A battery thermal management system and method for a wind, solar, diesel, and sand and waste energy storage system

Abstract

The present invention discloses a battery thermal management system and method for a wind, solar, diesel and sand and wasteland energy storage system, which belongs to the technical field of thermal management of lithium batteries. The method specifically comprises: collecting real-time monitored ambient temperature data and lithium battery pack temperature data; when the wind power generation module, the photovoltaic power generation module and the diesel power generation module collect power and transmit it to the lithium battery pack, judging whether to enable the thermal management strategy according to the current temperature of the lithium battery pack; when the lithium battery pack is discharged to the outside, judging whether to enable the thermal management strategy according to the current temperature of the lithium battery pack; adjusting the temperature of the lithium battery pack in real time according to the thermal management strategy, so that the lithium battery pack is always at the optimal working temperature; the stable performance output of the battery under various environmental conditions can be guaranteed, and the battery can be ensured to operate within the optimal temperature range, thereby improving the efficiency of the entire energy storage system.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium battery thermal management, and specifically is a battery thermal management system and method for a wind-solar-diesel-storage-sandwich energy storage system. Background Art

[0002] The development of integrated wind, solar, diesel and storage projects is limited by resource conditions. The volatility, intermittency and randomness of renewable energy sources such as wind and solar energy make it difficult for them to provide continuous and stable energy output when operating independently. Therefore, energy storage systems are needed to smooth out the volatility of renewable energy generation and ensure stable operation of the power grid. At the same time, the technology and economy of energy storage systems are also constantly improving, providing better choices and support for the construction and operation of integrated wind, solar, diesel and storage projects.

[0003] For example, a Chinese patent with publication number CN114824584A discloses a battery thermal management method suitable for distributed energy storage systems, including a first control strategy executed by a master controller and a second control strategy executed by a slave controller, wherein: the first control strategy obtains the battery power and battery temperature of each battery cluster to obtain a power set value for each battery cluster; the second control strategy adjusts each bidirectional converter according to the power set value for each battery cluster obtained by the first control strategy. This invention adopts a control strategy of a master controller and a slave controller in parallel, and through low-bandwidth communication between the master controller and the slave controller, it realizes the thermal management of each battery cluster, the generation of power set values, and the current control of the battery cluster during the operation of the distributed energy storage system. The control is simple, the switching is flexible, and the slave controllers do not interfere with each other, so the distributed control of the slave controllers can be realized.

[0004] For example, a Chinese patent with publication number CN117913422A discloses a battery thermal management system for a containerized energy storage system, including a processing cabinet, a detection unit, a cooling and fire prevention unit, and a ventilation unit. The processing cabinet is equipped with thermal management software, and the thermal management software is internally provided with a heat control module and a battery control module. This invention can effectively solve the problem that the battery thermal management system of the existing containerized energy storage system can only process the battery according to the outer wall temperature of the battery, and the outer wall temperature of the battery cannot reflect the temperature inside the battery, and the accuracy is poor. At the same time, the battery thermal management system cannot perform different degrees of cooling treatment on the battery according to different battery temperatures, and the intelligence level is low.

[0005] The problem with the above patent is that it cannot provide stable and continuous electricity in complex environments. Special environments include: areas with unstable electricity consumption, border outposts, plateaus, Shago Desert, and uninhabited areas in Xinjiang and Tibet. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention proposes a battery thermal management system and method for a wind-solar-diesel-storage energy storage system, which adopts wind power generation, photovoltaic power generation and diesel power generation modes, can overcome the complex environment, provide safe and reliable continuous energy, and meet the needs of development.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A battery thermal management system for a wind, solar, diesel, and sand and waste energy storage system, comprising: a wind power generation module, a photovoltaic power generation module, a diesel power generation module, an energy storage battery module, and a thermal management module;

[0009] The wind power generation module is used to convert wind energy into electrical energy, and works in conjunction with the photovoltaic power generation module and the diesel power generation module to store the converted electrical energy in the energy storage battery module;

[0010] The photovoltaic power generation module is used to convert light energy into electrical energy, and works in conjunction with the wind power generation module and the diesel power generation module to store the converted electrical energy in the energy storage battery module;

[0011] The diesel power generation module is used to convert the mechanical energy generated by burning diesel into electrical energy, and provide stable power support when the wind power generation module and the photovoltaic power generation module are short of power or when the power demand is at a peak;

[0012] The energy storage battery module is used to store the electric energy converted by the wind power generation module, the photovoltaic power generation module and the diesel power generation module, and to release the electric energy intelligently, so as to balance the supply and demand of electric power and provide stable electric power support;

[0013] The thermal management module is used to collect temperature data of the lithium battery pack in real time, and automatically manage the temperature of the lithium batteries in the energy storage battery module during charging and discharging using a heating management strategy and a cooling management strategy.

[0014] Specifically, the heating management strategy in the thermal management module includes the following steps:

[0015] Step S1: Set the temperature data set of the lithium battery pack collected at time t as AT, AT={a1, a2, ..., a n}, where a n Represents the average temperature of the nth lithium battery in the lithium battery pack, a n The calculation formula is: , where m represents the number of sensors placed on the nth lithium battery in the lithium battery pack, C j Represents the temperature data of the jth sensor placed in the nth lithium battery in the lithium battery pack;

[0016] Step S2: Setting the optimal temperature range for lithium battery pack discharge to (Tzx ,T zd ), T zd Greater than T zx , establish a battery thermal balance model, and use the battery thermal balance model to calculate the heat required by the heater when the i-th lithium battery in the lithium battery pack is heated to the optimal temperature range at time t. The calculation formula is:

[0017] ,

[0018] Among them, Q jr represents the heat generated by the heater at time t, m d represents the mass of the battery, c represents the specific heat capacity of the battery, △T represents the temperature difference of the battery, △T=T jr -a i , a i represents the average temperature of the i-th lithium battery in the lithium battery pack at time t, T jr represents the temperature of the heater at time t, Q loss represents the heat dissipated by the i-th lithium battery in the lithium battery pack at time t, Q gen It represents the heat generated when the i-th lithium battery in the lithium battery pack is discharged at time t;

[0019] , where k mem Indicates the thermal conductivity of the foam extruded board, d mem Indicates the thickness of the foam extruded board, T env represents the ambient temperature of the lithium battery pack, h represents the convection heat transfer coefficient, A represents the surface area of ​​the i-th lithium battery in the lithium battery pack exposed to the air, represents the emissivity of the outer surface of the i-th lithium battery in the lithium battery pack, represents the Stefan-Boltzmann constant, Q gen =I 2 R int ×t jr , where I represents the discharge current of the i-th lithium battery in the lithium battery pack, R int represents the internal resistance of the ith lithium battery in the lithium battery pack, t jr Indicates the heating time of the heater;

[0020] Step S3: Heating time t of the heater jr For precise control, the specific formula is:

[0021] ,

[0022] in, Indicates the efficiency of the heater, less than 1, V heat Indicates the voltage of the heater, R heatrepresents the resistance of the heater, D represents the duty cycle of PWM, which is between 0 and 1. PWM is a pulse width modulation technology.

[0023] Specifically, the cooling management strategy in the thermal management module includes the following steps:

[0024] Step A1: Set the maximum charging efficiency temperature range of the lithium battery pack to (T cd1 ,T cd2 ), when the ambient temperature of the lithium battery pack is lower than T cd1 When the heating management strategy is enabled, the battery is heated to T cd1 When , stop heating;

[0025] Step A2: When the temperature of the i-th lithium battery in the lithium battery pack rises to T2 while charging, cd3 , enable the cooler to cool down, and the specific formula for controlling the cooler to cool down is:

[0026] P cool (t2)=g(T env (t2),I(t2),T cd3 ),

[0027] Among them, P cool (t2) represents the power of the cooler at time t2, T env (t2) represents the temperature of the environment at time t2, I(t2) represents the charging current of the i-th lithium battery in the lithium battery pack at time t2, and g() represents the cooling comprehensive function;

[0028] Step A3: According to the formula for controlling the cooling of the cooler, when charging all the lithium batteries in the lithium battery pack, the temperature is controlled within the maximum charging efficiency temperature range (T cd1 ,T cd2 )middle.

[0029] Specifically, the wind power generation module includes:

[0030] Wind turbines, which convert wind energy into electricity;

[0031] Wind control unit, used to adjust the angle of the wind wheel and the working state of the generator;

[0032] Power equipment for transmitting electric energy converted from wind power to energy storage battery modules;

[0033] Grid-connected equipment, used to convert the electricity generated by wind turbines into electricity synchronized with the grid, ensuring safe operation of the grid-connected process;

[0034] Auxiliary equipment, used to assist in protecting wind power generation equipment.

[0035] Specifically, the photovoltaic power generation module includes:

[0036] Photovoltaic module unit, used to convert light energy into electrical energy and transmit the converted electrical energy to the energy storage battery module;

[0037] Monitoring unit, used to monitor the operating data of solar panels, combiner boxes, distribution cabinets and inverters in real time through the communication network, and to perform fault diagnosis and performance analysis;

[0038] Grid-connected equipment is used to synchronize the electrical energy generated by the photovoltaic module units with the grid and connect it to the grid.

[0039] Specifically, the diesel generator module comprises:

[0040] Diesel generator sets, which convert the mechanical energy produced by burning diesel into electrical energy;

[0041] A fuel unit, used to deliver diesel fuel after filtering out impurities to the diesel generator set;

[0042] A cooling unit is used to dissipate heat and cool the diesel generator set;

[0043] An exhaust unit is used to discharge the exhaust gas generated by the diesel generator set burning diesel;

[0044] Diesel control unit, used to monitor and adjust the operating parameters of the diesel engine, control the start, run and stop of the generator, and monitor voltage, current and frequency parameters;

[0045] A power transmission and distribution unit for transmitting the electricity generated by the diesel generator set to the energy storage battery module;

[0046] Protection devices used to protect generators and distribution systems from short circuit damage and overload conditions.

[0047] Specifically, the energy storage battery module includes:

[0048] Lithium battery packs for storing and supplying electrical energy transmitted by wind power generation modules, photovoltaic power generation modules, and diesel power generation modules;

[0049] A monitoring unit, used to monitor the operating status of the lithium battery pack in real time through a communication network, and to perform fault diagnosis and performance analysis;

[0050] Safety protection unit, used to detect whether a fire occurs in the lithium battery pack;

[0051] Energy management unit for optimizing charging and discharging strategies based on power demand and battery status.

[0052] A battery thermal management method for a wind-solar-diesel-storage-sand-waste energy storage system is implemented based on a battery thermal management system for a wind-solar-diesel-storage-sand-waste energy storage system, comprising the following steps:

[0053] Step 1: Collect real-time monitored ambient temperature data and lithium battery pack temperature data;

[0054] Step 2: When the wind power generation module, the photovoltaic power generation module and the diesel power generation module collect electricity and transmit it to the lithium battery pack, it is determined whether to enable the thermal management strategy according to the current temperature of the lithium battery pack;

[0055] Step 3: When the lithium battery pack is discharging, determine whether to enable the thermal management strategy based on the current temperature of the lithium battery pack;

[0056] Step 4: Adjust the temperature of the lithium battery pack in real time according to the thermal management strategy to keep the lithium battery pack at the optimal operating temperature at all times.

[0057] Specifically, the specific steps of step 2 are:

[0058] Step 201: when the lithium battery pack is being charged and the current temperature of the lithium battery pack is lower than the optimal operating temperature, the heating management strategy is used to heat the lithium battery pack until the temperature reaches the optimal operating temperature, and then the heating is stopped;

[0059] Step 202: When the lithium battery pack is charging and the current temperature of the lithium battery pack is higher than the optimal operating temperature, a cooling management strategy is used to cool the lithium battery pack until the temperature reaches the optimal operating temperature, and then cooling is stopped.

[0060] Specifically, the specific steps of step 3 are:

[0061] Step 301: when the lithium battery pack is discharging, and when the current temperature of the lithium battery pack is lower than the optimal working temperature, the heating management strategy is used to heat the lithium battery pack until the temperature reaches the optimal working temperature, and then the heating is stopped;

[0062] Step 302: When the lithium battery pack is discharging, and when the current temperature of the lithium battery pack is higher than the optimal operating temperature, a cooling management strategy is used to cool the lithium battery pack until the temperature reaches the optimal operating temperature, and then cooling is stopped.

[0063] An electronic device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, steps of a battery thermal management method for a wind-solar-diesel-storage-sand-waste energy storage system are implemented.

[0064] A computer-readable storage medium stores computer instructions, which, when executed, execute the steps of a battery thermal management method for a wind-solar-diesel-storage-sand-waste energy storage system.

[0065] Compared with the prior art, the present invention has the following beneficial effects:

[0066] 1. The present invention proposes a battery thermal management system for a wind-solar-diesel-storage-Shago Desert energy storage system, which can ensure the stable performance output of the battery under various environmental conditions and avoid performance fluctuations caused by temperature changes. For example, it can provide safe, reliable and continuous energy in military fields, border outposts, uninhabited areas in Xinjiang and Tibet, and the Shago Desert, thereby creating huge social and economic benefits.

[0067] 2. The present invention proposes a battery thermal management system for a wind-solar-diesel-storage-sandwich energy storage system. Through an effective thermal management method, it can avoid overheating or overcooling of the battery, reduce the damage to the battery caused by thermal stress, and thus extend the battery life.

[0068] 3. The present invention proposes a battery thermal management system for a wind, solar, diesel and sand storage energy storage system. Stable temperature control can improve the working efficiency of the battery and ensure that the battery operates within the optimal temperature range, thereby improving the efficiency of the entire energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 A battery thermal management system architecture flow chart of a wind-solar-diesel-storage-sand-waste energy storage system provided by the present invention;

[0070] Figure 2 A flow chart of a battery thermal management method for a wind-solar-diesel-storage-sand-waste energy storage system provided by the present invention. DETAILED DESCRIPTION

[0071] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, in the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "No. 1", "No. 2" and "No. 3" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The present invention is further explained below in conjunction with specific embodiments.

[0072] Example 1

[0073] See also Figure 1 , an embodiment provided by the present invention: a battery thermal management system of a wind-solar-diesel-storage-sand-horizontal energy storage system, comprising: a wind power generation module, a photovoltaic power generation module, a diesel power generation module, an energy storage battery module and a thermal management module;

[0074] The wind power generation module is used to convert wind energy into electrical energy, and works in conjunction with the photovoltaic power generation module and the diesel power generation module to store the converted electrical energy in the energy storage battery module;

[0075] The photovoltaic power generation module is used to convert light energy into electrical energy, and works in conjunction with the wind power generation module and the diesel power generation module to store the converted electrical energy in the energy storage battery module;

[0076] The diesel power generation module is used to convert the mechanical energy generated by burning diesel into electrical energy, and provide stable power support when the wind power generation module and the photovoltaic power generation module are short of power or when the power demand is at a peak;

[0077] The energy storage battery module is used to store the electric energy converted by the wind power generation module, the photovoltaic power generation module and the diesel power generation module, and to release the electric energy intelligently, so as to balance the supply and demand of electric power and provide stable electric power support;

[0078] The thermal management module is used to collect temperature data of the lithium battery pack in real time, and automatically manage the temperature of the lithium batteries in the energy storage battery module during charging and discharging using a heating management strategy and a cooling management strategy.

[0079] The heating management strategy in the thermal management module specifically includes the following steps:

[0080] Step S1: Set the temperature data set of the lithium battery pack collected at time t as AT, AT={a1, a2, ..., a n}, where a n Represents the average temperature of the nth lithium battery in the lithium battery pack, a n The calculation formula is: , where m represents the number of sensors placed on the nth lithium battery in the lithium battery pack, C j Represents the temperature data of the jth sensor placed in the nth lithium battery in the lithium battery pack;

[0081] Step S2: Setting the optimal temperature range for lithium battery pack discharge to (T zx ,T zd ), T zd Greater than T zx , establish a battery thermal balance model, and calculate the heat heated by the heater when the i-th lithium battery in the lithium battery pack is heated to the optimal temperature range at time t through the battery thermal balance model. The calculation formula is:

[0082] ,

[0083] Among them, Q jr represents the heat generated by the heater at time t, m drepresents the mass of the battery, c represents the specific heat capacity of the battery, △T represents the temperature difference of the battery, △T=T jr -a i , a i represents the average temperature of the i-th lithium battery in the lithium battery pack at time t, T jr represents the temperature of the heater at time t, Q loss represents the heat dissipated by the i-th lithium battery in the lithium battery pack at time t, Q gen It represents the heat generated when the i-th lithium battery in the lithium battery pack is discharged at time t;

[0084] , where k mem Indicates the thermal conductivity of the foam extruded board, d mem Indicates the thickness of the foam extruded board, T env represents the ambient temperature of the lithium battery pack, h represents the convection heat transfer coefficient, A represents the surface area of ​​the i-th lithium battery in the lithium battery pack exposed to the air, represents the emissivity of the outer surface of the i-th lithium battery in the lithium battery pack, represents the Stefan-Boltzmann constant, which is approximately 5.67×10 −8 , Q gen =I 2 R int ×t jr , where I represents the discharge current of the i-th lithium battery in the lithium battery pack, R int represents the internal resistance of the ith lithium battery in the lithium battery pack, t jr Indicates the heating time of the heater;

[0085] Step S3: Heating time t of the heater jr For precise control, the specific formula is:

[0086] ,

[0087] in, Indicates the efficiency of the heater, less than 1, V heat Indicates the voltage of the heater, R heat represents the resistance of the heater, D represents the duty cycle of PWM, which is between 0 and 1. PWM is a pulse width modulation technology.

[0088] The main function of heating is: in harsh environments, such as border outposts, Shago Desert and uninhabited areas in Xinjiang and Tibet, where the temperature is extremely low, the battery temperature needs to be heated to a certain degree to enable the lithium battery pack to charge efficiently. When the lithium battery pack is discharging, the temperature also needs to be heated to a certain degree to enable the lithium battery pack to discharge efficiently, so that the temperature is within the optimal threshold.

[0089] The cooling management strategy in the thermal management module specifically includes the following steps:

[0090] Step A1: Set the maximum charging efficiency temperature range of the lithium battery pack to (T cd1 ,T cd2 ), when the ambient temperature of the lithium battery pack is lower than T cd1 When the heating management strategy is enabled, the battery is heated to T cd1 When , stop heating;

[0091] Step A2: When the temperature of the i-th lithium battery in the lithium battery pack rises to T2 while charging, cd3 , T cd3 >T cd2 , enable the cooler to cool down, and the specific formula for controlling the cooler to cool down is:

[0092] P cool (t2)=g(T env (t2),I(t2),T cd3 ),

[0093] Among them, P cool (t2) represents the power of the cooler at time t2, T env (t2) represents the temperature of the environment at time t2, I(t2) represents the charging current of the i-th lithium battery in the lithium battery pack at time t2, and g() represents the cooling comprehensive function;

[0094] ,

[0095] ,

[0096] in, represents the temperature difference adjustment coefficient, represents the ambient temperature adjustment coefficient, Indicates the charging current temperature regulation coefficient, Represents the temperature difference control term, that is, the direct impact of the difference between the current battery temperature and the optimal operating temperature on the cooling power, which is adjusted by the coefficient To control this effect and ensure that the battery temperature is as close to the optimal operating temperature range as possible, Indicates the influence of ambient temperature, that is, the influence of the difference between the current battery temperature and the ambient temperature on the cooling power. In a high temperature environment, the cooling demand increases, and the adjustment coefficient To control this influence, Indicates the charging current influence term, that is, the heat generated by the product of the charging current and the battery internal resistance, which directly affects the battery temperature. The larger the charging current, the higher the heat generation, and the adjustment coefficient Used to control this effect and avoid overheating of the battery.

[0097] Temperature difference adjustment factor Determined through experimental data, ensure that when the battery temperature is close to the optimal operating temperature, the cooling system can respond quickly and the ambient temperature adjustment coefficient Considering the impact of ambient temperature changes on the cooling system, the charging current temperature adjustment coefficient is determined through experimental data. Experiments were conducted to determine the effect of charging current on temperature to ensure that the battery does not overheat during high current charging.

[0098] The cooling comprehensive function g() is a range, that is, the working power of the cooler is also a range, ensuring operation at the optimal temperature and saving electricity.

[0099] Step A3: According to the formula for controlling the cooling of the cooler, when charging all the lithium batteries in the lithium battery pack, the temperature is controlled within the maximum charging efficiency temperature range (T cd1 ,T cd2 )middle.

[0100] The main function of cooling is: in harsh environments, such as border outposts, Shago Desert and uninhabited areas in Xinjiang and Tibet, where the temperature is extremely low, when the lithium battery pack is charging, the temperature of the lithium battery pack will gradually increase. The battery temperature needs to be cooled to a certain degree to enable the lithium battery pack to charge efficiently. When the lithium battery pack is charging, when the temperature exceeds the maximum charging efficiency temperature range, cooling treatment is required to keep the temperature within the optimal threshold.

[0101] The wind power generation module comprises:

[0102] A wind turbine, comprising a wind rotor and a generator, is used to convert wind energy into electrical energy;

[0103] Wind wheel: It is composed of multiple blades. When wind blows through the blades, it produces rotational motion. Generator: The rotation of the wind wheel drives the generator through the transmission system, converting mechanical energy into electrical energy.

[0104] Wind control unit, including wind speed sensor, wind direction sensor and controller, used to adjust the angle of the wind wheel and the working state of the generator;

[0105] Wind speed sensors and wind direction sensors are used to monitor wind speed and direction in real time and provide data to the wind control unit; the controller is used to adjust the angle of the wind wheel and the working state of the generator according to the sensor data to optimize the power generation efficiency.

[0106] Power equipment, including inverters and transformers, used to transmit wind-converted electricity to energy storage battery modules;

[0107] The inverter is used to convert the AC power output by the wind turbine into electrical energy that meets the requirements of the power grid; the transformer is used to increase the voltage to reduce transmission losses and transmit the electrical energy to the energy storage battery module.

[0108] Grid-connected equipment, including grid-connected inverters and protection equipment, is used to convert the electricity generated by wind turbines into electricity synchronized with the grid, ensuring safe operation of the grid-connected process;

[0109] Protection equipment also includes circuit breakers, relay protection devices, etc. to ensure safety and stability during the grid connection process.

[0110] Auxiliary equipment, including cooling equipment and lubrication units, used to assist in protecting wind power generation equipment;

[0111] The cooling equipment is used to provide cooling for the generator and electronic equipment to prevent overheating; the lubrication unit is used to keep the wind wheel and transmission system lubricated to reduce friction and wear.

[0112] The photovoltaic power generation module comprises:

[0113] Photovoltaic module units, including solar panels, combiner boxes, distribution cabinets and inverters, are used to convert light energy into electrical energy and transmit the converted electrical energy to energy storage battery modules;

[0114] The solar panel is used to directly convert sunlight into direct current electricity;

[0115] The combiner box is used to combine the direct current generated by multiple solar panels. The combiner box is also equipped with a fuse and a lightning protection device to protect the solar panels from current overload and lightning damage.

[0116] The power distribution cabinet includes a DC power distribution cabinet and an AC power distribution cabinet. The DC power distribution cabinet is used to distribute the DC power collected by the combiner box to the inverter, and the AC power distribution cabinet distributes the AC power output by the inverter to the energy storage battery module. The power distribution cabinet also includes a circuit breaker and an isolating switch for maintaining and protecting the circuit;

[0117] The inverter is used to convert the DC power in the DC distribution cabinet into AC power and transmit it to the AC distribution cabinet. The inverter contains a maximum power point tracking (MPPT) algorithm to optimize the output power of the photovoltaic module and ensure the efficient operation of the system under various lighting conditions.

[0118] Monitoring unit, used to monitor the operating data of solar panels, combiner boxes, distribution cabinets and inverters in real time through the communication network, and to perform fault diagnosis and performance analysis;

[0119] Grid-connected equipment is used to synchronize the electricity generated by photovoltaic module units with the power grid and connect them to the power grid. It also includes circuit breakers and relay protection devices to ensure safety and stability during the grid-connected process.

[0120] The diesel power generation module comprises:

[0121] Diesel generator sets, including diesel engines and generators, are used to convert mechanical energy generated by burning diesel into electrical energy;

[0122] As a power source, a diesel engine generates mechanical energy by burning diesel; a generator converts the mechanical energy generated by a diesel engine into electrical energy, usually alternating current;

[0123] The fuel unit includes a fuel tank, a fuel pump and a fuel filter, and is used to deliver the diesel fuel after filtering out impurities to the diesel generator set;

[0124] The fuel tank is used to store diesel to ensure the continuous operation of the generator; the fuel pump is used to transport diesel from the fuel tank to the diesel engine; the fuel filter is used to filter impurities in the diesel to ensure the purity of the fuel;

[0125] A cooling unit, including a radiator and a water pump, is used to dissipate heat and cool the diesel generator set;

[0126] Radiator, used to dissipate the heat of the engine to the environment through the radiator and fan; water pump, used to circulate the coolant to maintain the normal operating temperature of the diesel engine;

[0127] An exhaust unit is used to discharge the exhaust gas generated by the diesel generator set burning diesel;

[0128] Diesel control unit, used to monitor and adjust the operating parameters of the diesel engine, such as speed, fuel consumption and emissions, control the start, run and stop of the generator, and monitor parameters such as voltage, current and frequency;

[0129] A power transmission and distribution unit for transmitting the electricity generated by the diesel generator set to the energy storage battery module;

[0130] Protection devices used to protect generators and distribution systems from short circuit damage and overload conditions.

[0131] The energy storage battery module comprises:

[0132] Lithium battery packs for storing and supplying electrical energy transmitted by wind power generation modules, photovoltaic power generation modules, and diesel power generation modules;

[0133] The lithium battery pack adopts a grid-like structure of multiple lithium batteries, so that when any lithium battery fails, it will not affect the operation of other lithium batteries and the entire lithium battery pack;

[0134] A monitoring unit, used to monitor the operating status of the lithium battery pack in real time through a communication network, and to perform fault diagnosis and performance analysis;

[0135] Safety protection unit, including smoke detector, fire extinguisher or automatic fire extinguishing system, used to detect whether the lithium battery pack has a fire;

[0136] Energy management unit, which is used to optimize the charging and discharging strategy according to power demand and battery status, provide load forecasting, energy optimization and cost control, and maximize system benefits;

[0137] Example 2

[0138] See also Figure 2 Another embodiment provided by the present invention is a battery thermal management method for a wind-solar-diesel-storage-sand-waste energy storage system, comprising:

[0139] Step 1: Collect real-time monitored ambient temperature data and lithium battery pack temperature data;

[0140] Step 2: When the wind power generation module, photovoltaic power generation module and diesel power generation module collect electricity and transmit it to the lithium battery pack, determine whether to enable the thermal management strategy according to the current temperature of the lithium battery pack;

[0141] Step 3: When the lithium battery pack is discharging, determine whether to enable the thermal management strategy based on the current temperature of the lithium battery pack;

[0142] Step 4: Adjust the temperature of the lithium battery pack in real time according to the thermal management strategy to keep the lithium battery pack at the optimal operating temperature at all times.

[0143] The specific steps of step 2 are:

[0144] Step 201: when the lithium battery pack is being charged and the current temperature of the lithium battery pack is lower than the optimal operating temperature, the heating management strategy is used to heat the lithium battery pack until the temperature reaches the optimal operating temperature, and then the heating is stopped;

[0145] Step 202: When the lithium battery pack is charging and the current temperature of the lithium battery pack is higher than the optimal operating temperature, a cooling management strategy is used to cool the lithium battery pack until the temperature reaches the optimal operating temperature, and then cooling is stopped.

[0146] The specific steps of step 3 are:

[0147] Step 301: when the lithium battery pack is discharging, and when the current temperature of the lithium battery pack is lower than the optimal working temperature, the heating management strategy is used to heat the lithium battery pack until the temperature reaches the optimal working temperature, and then the heating is stopped;

[0148] Step 302: When the lithium battery pack is discharging, and when the current temperature of the lithium battery pack is higher than the optimal operating temperature, a cooling management strategy is used to cool the lithium battery pack until the temperature reaches the optimal operating temperature, and then cooling is stopped.

[0149] Here, “below the optimum operating temperature” refers to the lowest value below the optimum operating temperature, and “above the optimum operating temperature” refers to the highest value above the optimum operating temperature.

[0150] Example 3

[0151] A computer-readable storage medium stores computer instructions, which, when executed, execute a battery thermal management method for a wind-solar-diesel-storage-sand-waste energy storage system.

[0152] An electronic device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, a battery thermal management method for a wind-solar-diesel-storage-sand-corrosion energy storage system is implemented.

[0153] In addition, the parts of the above-mentioned technical solutions provided in the embodiments of the present application that are consistent with the implementation principles of the corresponding technical solutions in the prior art are not described in detail to avoid excessive redundancy.

[0154] The specific implementation modes as described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation mode of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery thermal management system for a wind, solar, diesel, and sand and waste energy storage system, characterized in that: include: Wind power generation module, photovoltaic power generation module, diesel power generation module, energy storage battery module and thermal management module; The thermal management module is used to collect temperature data of the lithium battery pack in real time, and automatically manage the temperature of the lithium batteries in the energy storage battery module during charging and discharging using a heating management strategy and a cooling management strategy; The heating management strategy in the thermal management module specifically includes the following steps: Step S1: Setting The temperature data set of the lithium battery pack collected at all times is , ,in, Indicates the number of lithium batteries in a pack The average temperature of each lithium battery; Step S2: Set the optimal temperature range for lithium battery pack discharge to , Greater than When the battery thermal balance model is established, the battery thermal balance model is used to calculate The heat of the heater when the i-th lithium battery in the lithium battery pack is heated to the optimal temperature range at any moment; Step S3: Heating time of heater Conduct precise control; The cooling management strategy in the thermal management module specifically includes the following steps: Step A1: Set the maximum efficiency temperature range of lithium battery pack charging to When the ambient temperature of the lithium battery pack is lower than When the heating management strategy is enabled, the battery is heated to When , stop heating; Step A2: When Lithium battery pack When a lithium battery is charged, the temperature rises to , enable the cooler to cool down, and the specific formula for controlling the cooler to cool down is: ， in, express The power of the cooler at the moment, express The temperature of the environment at the moment, express Lithium battery pack The charging current of a lithium battery, represents the cooling comprehensive function; Step A3: According to the formula for controlling the cooling of the cooler, when charging all the lithium batteries in the lithium battery pack, the temperature is controlled within the temperature range of maximum charging efficiency. middle.

2. A battery thermal management system for a wind-solar-diesel-storage-sand-waste energy storage system as claimed in claim 1, characterized in that: In step S1 The calculation formula is: , where m represents the number of sensors placed on the nth lithium battery in the lithium battery pack, C j Represents the temperature data of the jth sensor placed in the nth lithium battery in the lithium battery pack; The battery thermal balance model is used to calculate The heat generated by the heater when the i-th lithium battery in the lithium battery pack is heated to the optimal temperature range at the moment is calculated as: ， in, represents the heat generated by the heater at time t, Indicates the quality of the battery. represents the specific heat capacity of the battery, Indicates the temperature difference of the battery, , express Lithium battery pack The average temperature of a lithium battery, express The temperature of the heater at the moment, express Lithium battery pack The heat dissipated by a lithium battery, express Lithium battery pack The heat generated when a lithium battery is discharged; The calculation formula is: ， Among them, k mem Indicates the thermal conductivity of the foam extruded board, d mem Indicates the thickness of the foam extruded board, T env represents the ambient temperature of the lithium battery pack, h represents the convection heat transfer coefficient, A represents the surface area of ​​the i-th lithium battery in the lithium battery pack exposed to the air, represents the emissivity of the outer surface of the i-th lithium battery in the lithium battery pack, represents the Stefan-Boltzmann constant, Q gen =I 2 R int ×t jr , where I represents the discharge current of the i-th lithium battery in the lithium battery pack, R int represents the internal resistance of the ith lithium battery in the lithium battery pack, t jr Indicates the heating time of the heater; In step S3, the heating time of the heater is The specific formula for precise control is: ， in, Indicates the efficiency of the heater, which is less than 1. Indicates the voltage of the heater, represents the resistance of the heater, Indicates the duty cycle of PWM, between 0-1. PWM is a pulse width modulation technology.

3. A battery thermal management system for a wind-solar-diesel-storage-sand-waste energy storage system as claimed in claim 2, characterized in that: The wind power generation module is used to convert wind energy into electrical energy and work in conjunction with the photovoltaic power generation module and the diesel power generation module to store the converted electrical energy in the energy storage battery module, including: Wind turbines, which convert wind energy into electricity; Wind control unit, used to adjust the angle of the wind wheel and the working state of the generator; Power equipment for transmitting electric energy converted from wind power to energy storage battery modules; Grid-connected equipment, used to convert the electricity generated by wind turbines into electricity synchronized with the grid, ensuring safe operation of the grid-connected process; Auxiliary equipment, used to assist in protecting wind power generation equipment.

4. A battery thermal management system for a wind-solar-diesel-storage-sand-waste energy storage system as claimed in claim 3, characterized in that: The photovoltaic power generation module is used to convert light energy into electrical energy, and works in conjunction with the wind power generation module and the diesel power generation module to store the converted electrical energy in the energy storage battery module, including: Photovoltaic module unit, used to convert light energy into electrical energy and transmit the converted electrical energy to the energy storage battery module; Monitoring unit, used to monitor the operating data of solar panels, combiner boxes, distribution cabinets and inverters in real time through the communication network, and to perform fault diagnosis and performance analysis; Grid-connected equipment is used to synchronize the electrical energy generated by the photovoltaic module units with the grid and connect it to the grid.

5. A battery thermal management system for a wind-solar-diesel-storage-sand-waste energy storage system as claimed in claim 4, characterized in that: The diesel power generation module is used to convert the mechanical energy generated by burning diesel into electrical energy, and provide stable power support when the wind power generation module and the photovoltaic power generation module are short of power or when the power demand is at a peak, including: Diesel generator sets, which convert the mechanical energy produced by burning diesel into electrical energy; A fuel unit, used to deliver diesel fuel after filtering out impurities to the diesel generator set; A cooling unit is used to dissipate heat and cool the diesel generator set; An exhaust unit is used to discharge the exhaust gas generated by the diesel generator set burning diesel; Diesel control unit, used to monitor and adjust the operating parameters of the diesel engine, control the start, run and stop of the generator, and monitor voltage, current and frequency parameters; A power transmission and distribution unit for transmitting the electricity generated by the diesel generator set to the energy storage battery module; Protection devices used to protect generators and distribution systems from short circuit damage and overload conditions.

6. A battery thermal management system for a wind-solar-diesel-storage-sand-waste energy storage system as claimed in claim 5, characterized in that: The energy storage battery module is used to store the electric energy converted by the wind power generation module, the photovoltaic power generation module and the diesel power generation module, and to release the electric energy intelligently, balance the supply and demand of electric power, and provide stable electric power support, including: Lithium battery packs for storing and supplying electrical energy transmitted by wind power generation modules, photovoltaic power generation modules, and diesel power generation modules; A monitoring unit, used to monitor the operating status of the lithium battery pack in real time through a communication network, and to perform fault diagnosis and performance analysis; Safety protection unit, used to detect whether a fire occurs in the lithium battery pack; Energy management unit for optimizing charging and discharging strategies based on power demand and battery status.

7. A battery thermal management method for a wind-solar-diesel-storage-sandwich energy storage system, which is implemented based on a battery thermal management system for a wind-solar-diesel-storage-sandwich energy storage system according to any one of claims 1-6, characterized in that: The following steps are involved: Step 1: Collect real-time monitored ambient temperature data and lithium battery pack temperature data; Step 2: When the wind power generation module, photovoltaic power generation module and diesel power generation module collect electricity and transmit it to the lithium battery pack, determine whether to enable the thermal management strategy according to the current temperature of the lithium battery pack; Step 3: When the lithium battery pack is discharging, determine whether to enable the thermal management strategy based on the current temperature of the lithium battery pack; Step 4: Adjust the temperature of the lithium battery pack in real time according to the thermal management strategy to keep the lithium battery pack at the optimal operating temperature at all times.

8. The battery thermal management method of a wind-solar-diesel-storage-sand-waste energy storage system as claimed in claim 7, characterized in that: The specific steps of step 2 are: Step 201: when the lithium battery pack is being charged and the current temperature of the lithium battery pack is lower than the optimal operating temperature, the heating management strategy is used to heat the lithium battery pack until the temperature reaches the optimal operating temperature, and then the heating is stopped; Step 202: When the lithium battery pack is charging and the current temperature of the lithium battery pack is higher than the optimal operating temperature, a cooling management strategy is used to cool the lithium battery pack until the temperature reaches the optimal operating temperature, and then cooling is stopped.

9. The battery thermal management method of a wind-solar-diesel-storage-sand-waste energy storage system as claimed in claim 8, characterized in that: The specific steps of step 3 are: Step 301: when the lithium battery pack is discharging, and when the current temperature of the lithium battery pack is lower than the optimal working temperature, the heating management strategy is used to heat the lithium battery pack until the temperature reaches the optimal working temperature, and then the heating is stopped; Step 302: When the lithium battery pack is discharging, and when the current temperature of the lithium battery pack is higher than the optimal operating temperature, a cooling management strategy is used to cool the lithium battery pack until the temperature reaches the optimal operating temperature, and then cooling is stopped.

10. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of a battery thermal management method for a wind-solar-diesel-storage-storage energy storage system described in any one of claims 7 to 9 are implemented.

11. A computer-readable storage medium, characterized in that: Computer instructions are stored thereon, and when the computer instructions are executed, the steps of a battery thermal management method for a wind-solar-diesel-storage-storage-energy-storage system described in any one of claims 7-9 are executed.

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