Valley electrochemical heat storage and energy supply system based on photo-thermal coupling

Abstract

The invention discloses a valley electrochemical heat storage and energy supply system based on photo-thermal coupling, and relates to the technical field of energy storage and supply, and the system comprises a photo-thermal module, an electrochemical energy storage module, an intelligent control module and a heat exchange and energy supply module. Efficient conversion and intelligent complementation of energy are achieved, the photo-thermal module can efficiently collect solar energy and convert the solar energy into heat energy to be stored, a stable heat source is provided for the electrochemical energy storage module, electrochemical reaction is assisted, the energy storage efficiency is improved, and meanwhile the intelligent control module controls the intelligent control module according to the temperature state and the electric energy requirement of the electrochemical energy storage module. The heat output and light condensation parameters of the photo-thermal module are dynamically adjusted, intelligent distribution and adjustment of energy are achieved, and due to the synergistic effect, the utilization efficiency of the energy is improved, and the stability and reliability of the system are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage and supply, and in particular to a valley electrochemical heat storage and energy supply system based on photothermal coupling. Background Art

[0002] In today's society, energy demand continues to rise with economic development and population growth. Whether it is high-temperature smelting and chemical synthesis in industrial production, or heating, cooling and hot water supply in residents' daily lives, dependence on energy is everywhere. The traditional energy supply system mainly relies on fossil fuel power generation and direct heating. This model not only faces the crisis of increasingly depleted fossil energy, but also brings a heavy burden to the ecological environment due to large amounts of greenhouse gas emissions during the combustion process. It is urgent to transform to clean and sustainable energy utilization methods.

[0003] Although there are currently a variety of solar energy conversion and storage technologies, such as photovoltaic power generation, solar thermal power generation, and electrochemical energy storage, these technologies still have many shortcomings in practical applications. Although photovoltaic power generation technology has high conversion efficiency, it is greatly affected by environmental factors such as light intensity and temperature, and the cost of electric energy storage is relatively high. Although solar thermal power generation technology can provide stable energy, the heat storage efficiency and the secondary conversion efficiency of thermal energy need to be improved. Although electrochemical energy storage technology has the advantages of high energy density and long cycle life, battery performance is easily affected in high temperature environments, resulting in a decrease in energy storage efficiency, and battery thermal management is complex and costly. In addition, in the existing technology, the synergistic effect of solar thermal and electrochemical energy storage has not been fully utilized, making it difficult to achieve efficient energy conversion and intelligent complementarity.

[0004] In summary, a new heat storage energy supply system is developed that can effectively integrate the advantages of solar thermal energy and valley electricity and overcome their respective shortcomings to improve the comprehensive benefits of energy utilization. Summary of the invention

[0005] The purpose of the present invention is to make up for the shortcomings of the prior art and provide a valley electrochemical heat storage energy supply system based on photothermal coupling. It can significantly improve the stability and reliability of energy supply through the photothermal coupling and valley electricity synergy mechanism. On the one hand, the photothermal module collects solar energy and converts it into thermal energy storage, laying the foundation for system energy supply. Even in periods of poor lighting, the electrochemical energy storage module can be replenished at any time to ensure uninterrupted energy supply. On the other hand, the intelligent control module accurately regulates the distribution of photothermal and valley electricity energy according to the real-time working conditions to avoid energy supply interruptions and ensure the stability of energy supply.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a valley electrochemical heat storage and energy supply system based on photothermal coupling, the components of which include: a photothermal module, an electrochemical energy storage module, an intelligent control module, and a heat exchange and energy supply module;

[0007] The photothermal module includes a light-collecting unit, a heat conversion unit and a heat storage unit, which are used to collect solar energy and convert it into heat energy for storage;

[0008] The electrochemical energy storage module includes a battery pack, a battery management unit and a thermal management unit, which are responsible for the storage and release of electrical energy, and also monitor and regulate the battery temperature;

[0009] The intelligent control module includes a thermal control electric unit and an electrically controlled heat-assisted power generation unit, and uses a thermal-electric bidirectional feedback regulation algorithm to dynamically adjust the heat output and focusing parameters of the photothermal module according to the temperature state and power demand of the electrochemical energy storage module.

[0010] The thermal-electric bidirectional feedback regulation algorithm uses the real-time temperature T es , set the lower limit of the suitable working temperature range to T min , the upper limit is T max ;

[0011] When T es >T max When the light-thermal module is controlled to reduce the heat output, the focusing area S of the focusing unit is adjusted to Focusing is performed, where S0 is the initial focusing area, by reducing the focusing area and setting the focusing area reduction safety value S aq And S≤S aq When maintaining the focusing area S aq , reduce the heat transferred from the solar thermal module to the electrochemical energy storage module to prevent the battery from overheating;

[0012] When T es <T min And the power demand is E d When the electric control thermal auxiliary power generation mode is started, according to the thermal energy Q stored in the solar thermal module th , when Q th ≥E d ×k, k is the heat-electricity conversion coefficient. The intelligent control module controls the photothermal module to supply heat to the electrochemical energy storage module to assist in power generation. At the same time, the focusing unit is adjusted to increase the focusing area S. Concentrate light to capture more solar energy and convert it into thermal energy to meet the demand for additional electricity.

[0013] The heat exchange and energy supply module includes a heat exchanger and an energy buffer unit, has an energy buffer function, and provides adaptive energy according to different load requirements.

[0014] Furthermore, the photothermal module includes a light collecting unit, a heat conversion unit and a heat storage unit, wherein:

[0015] The focusing unit is composed of a focusing lens array, which adjusts the angle in real time according to the control instructions transmitted by the intelligent control module to focus the scattered sunlight onto the heat conversion unit;

[0016] The heat conversion unit collects and focuses solar energy, converts the light energy into heat energy, and transmits the heat energy to the heat storage unit in real time;

[0017] The heat storage unit temporarily stores the heat energy generated by the heat conversion unit, on the one hand waiting for instructions from the intelligent control module to supply heat to the electrochemical energy storage module as needed to assist the electrochemical reaction; on the other hand continuously providing basic heat energy for the heat exchange and energy supply module.

[0018] Furthermore, the electrochemical energy storage module comprises a battery pack, a battery management unit and a thermal management unit, wherein:

[0019] The battery pack is charged according to the current and voltage parameters regulated by the battery management unit, stores electric energy, and discharges according to instructions when supplying energy;

[0020] The battery management unit monitors the battery pack power, voltage, and current parameters in real time, communicates bidirectionally with the intelligent control module, receives control instructions to optimize the charging and discharging strategy, and feeds back the battery status information;

[0021] The thermal management unit has a built-in temperature sensor. When the temperature of the battery pack deviates from the suitable operating temperature range {T min , T max}, a temperature warning is sent to the intelligent control module in real time, and cooling and heating measures are started according to instructions to adjust the battery temperature, and heat exchange is carried out with the photothermal module for collaborative temperature control.

[0022] Furthermore, the thermal management unit of the electrochemical energy storage module uses the heat Q transferred to the battery pack by the photothermal module when cooperating with the photothermal module to control the temperature. p , when the battery pack temperature T es When the temperature deviates from the suitable range, according to the formula Calculate the battery pack temperature change ΔT to accurately control the heat dissipation and heating measures to ensure that the battery pack temperature is stable in an appropriate range, where P s is the heat dissipation power of the thermal management unit itself, c b is the specific heat capacity of the battery pack, m b is the mass of the battery pack, and t1 is the regulation time of the battery pack.

[0023] Furthermore, the battery management unit of the electrochemical energy storage module uses the electricity price C during the valley electricity period when regulating the charging of the battery pack. g and the current remaining battery charge E r , according to the formula Calculate the charging current I, where t is the valley time, Ec The rated capacity of the battery pack is used to optimize the charging cost and give priority to fully charging the battery during the valley power stage. r ≈E c When the battery is in good condition, Adjust the charging current, where I0 is the initially set charging current, to avoid damage to the battery due to overcharging.

[0024] Furthermore, the heat exchange and functional module includes a heat exchanger and an energy buffer unit, wherein:

[0025] One end of the heat exchanger is connected to the thermal storage unit of the photothermal module and the electrochemical energy storage module. When facing different load requirements, the heat exchanger converts input energy into output heat energy according to the instructions of the intelligent control module;

[0026] During the system energy supply process, when the energy output of the photothermal module and the electrochemical energy storage module fluctuates, the energy buffer unit maintains the stability of power supply, that is, it absorbs and stores when there is excess thermal energy, and releases and supplements when there is insufficient thermal energy, thereby ensuring the stability of the heat exchanger's output of thermal energy.

[0027] Furthermore, the heat exchange and function module uses a heat exchanger, according to the real-time temperature demand T fed back by the load end. r and the required energy power P r To control the output, the heat exchange efficiency of the heat exchanger is η, when the heat energy provided by the photothermal module is Q th , the electric energy provided by the electrochemical energy storage module is E es , satisfying Q th ×η+E es ≥P r When the energy is not satisfied, the intelligent control module coordinates the module to increase the energy output to ensure stable energy supply. In the energy supply process, the energy buffer unit Energy storage, where E b Reserve energy for the buffer unit, E max It is the maximum energy storage capacity of the buffer unit to cope with energy supply fluctuations.

[0028] Furthermore, the intelligent control module includes a thermal control electric unit and an electric control heat-assisted power generation unit, wherein:

[0029] When the temperature of the electrochemical energy storage module is high and affects the energy storage performance, the intelligent control module starts the thermal control unit to reduce the battery temperature and protect the battery performance by adjusting the heat output of the photothermal module;

[0030] When the demand for electricity is at a peak and the electrochemical energy storage is insufficient, the electrically controlled thermal auxiliary power generation unit utilizes the thermal energy stored in the photothermal module to perform auxiliary power generation, thereby realizing intelligent complementarity between thermal energy and electrical energy.

[0031] Compared with the existing technology, this valley electrochemical heat storage energy supply system based on photothermal coupling has the following beneficial effects:

[0032] 1. The present invention realizes efficient energy conversion and intelligent complementarity through the synergistic effect of the photothermal module and the electrochemical energy storage module; the photothermal module can efficiently collect solar energy and convert it into thermal energy storage, provide a stable heat source for the electrochemical energy storage module, assist the electrochemical reaction, and improve the energy storage efficiency. At the same time, the intelligent control module dynamically adjusts the heat output and focusing parameters of the photothermal module according to the temperature state and power demand of the electrochemical energy storage module, realizing intelligent distribution and regulation of energy. This synergistic effect not only improves the energy utilization efficiency, but also enhances the stability and reliability of the system.

[0033] Second, the thermal-electric bidirectional feedback regulation mechanism of the present invention solves the problem of performance degradation of electrochemical energy storage modules in high temperature environments. By real-time monitoring of battery temperature, the intelligent control module can timely adjust the heat output of the photothermal module, reduce battery temperature, and protect battery performance. At the same time, when the demand for electricity is at a peak or the electrochemical energy storage is insufficient, part of the heat energy stored in the photothermal module is used for auxiliary power generation, thus realizing the intelligent complementarity of heat energy and electric energy. This regulation mechanism not only improves the service life and energy storage efficiency of the battery, but also enhances the flexibility and adaptability of the system.

[0034] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 The operating flow chart of a valley electrochemical thermal storage energy supply system based on photothermal coupling is as follows;

[0037] Figure 2 This is a block diagram of the composition of a valley electrochemical heat storage energy supply system based on photothermal coupling. DETAILED DESCRIPTION

[0038] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0039] Embodiment 1

[0040] This embodiment demonstrates in detail the application process of a valley electrochemical heat storage energy supply system based on photothermal coupling. The system is mainly composed of a photothermal module, an electrochemical energy storage module, an intelligent control module and a heat exchange and energy supply module. Through the close collaboration between the modules and the precise regulation of the intelligent control module, efficient utilization of solar energy and valley electricity, intelligent conversion and storage of energy, and stable and reliable energy supply are achieved.

[0041] At the beginning of system startup, the intelligent control module first performs a comprehensive self-check on the system to ensure that each module and unit functions normally. At the same time, it sets the initial parameters for the focusing unit, heat conversion unit and heat storage unit of the photothermal module, the battery pack, battery management unit and thermal management unit of the electrochemical energy storage module, and the heat exchanger and energy buffer unit of the heat exchange and energy supply module, and determines the rated capacity E of the battery management unit in the electrochemical energy storage module. c , charging current I0 and other key parameters, the thermal management unit sets the appropriate lower limit of the operating temperature range T min and upper limit T max , and its own heat dissipation power P s , specific heat capacity of the battery pack c b and mass m b These parameters will be used for subsequent temperature monitoring and control calculations.

[0042] During the daytime operation of the solar thermal module, the focusing unit monitors the changes in the intensity of sunlight in real time. The focusing mirror array accurately adjusts the angle according to the real-time monitoring data pre-transmitted by the intelligent control module to ensure that the scattered sunlight is efficiently focused on the heat conversion unit, providing sufficient energy for the light-to-heat conversion. The heat conversion unit quickly converts light energy into heat energy, which is transmitted to the heat storage unit in real time by heat conduction after generation. During the whole process, the temperature of the heat conversion unit will gradually increase, and its temperature change will be monitored in real time by the built-in temperature sensor, and the data will be fed back to the intelligent control module. Based on these data, the intelligent control module can determine whether the light-to-heat conversion process is operating normally, and can indirectly evaluate the focusing effect of the focusing unit according to the temperature change trend. If the temperature rise is found to be abnormally slow, it may indicate that the focusing unit has a focusing problem and needs further inspection and adjustment. After receiving the heat energy transmitted by the heat conversion unit, the heat storage unit absorbs heat and its own temperature rises. During this process, the heat storage unit continuously monitors its own heat storage capacity Q thand temperature changes. Once the intelligent control module issues a heating instruction according to the state of the electrochemical energy storage module, the thermal storage unit will supply heat to the electrochemical energy storage module to assist the electrochemical reaction according to the instruction. For example, when the battery temperature T es Below the lower limit of the suitable working temperature range T min And the system has power demand E d When the intelligent control module first determines the thermal energy Q stored in the solar thermal module th Does it meet the condition Q? th ≥E d ×k, k is the heat-electricity conversion coefficient. If the conditions are met, the intelligent control module starts the heat supply auxiliary power generation process, and the thermal storage unit converts thermal energy into electrical energy to supplement the electrochemical energy storage module. At the same time, it sends an instruction to increase the focusing area to the focusing unit. The focusing area S is calculated according to the formula Adjustments are made to capture more solar energy and convert it into thermal energy to meet the demand for additional electricity.

[0043] During the off-peak period, the battery management unit of the electrochemical energy storage module starts the charging process according to the instructions of the intelligent control module. Calculate the charging current I, where C g is the electricity price during off-peak hours, E r is the current remaining capacity of the battery pack, and t is the valley power duration. In this way, the system can reasonably adjust the charging current according to the remaining capacity of the battery during the valley power stage when the electricity price is low, thereby optimizing the charging cost. When the battery pack capacity is close to the rated capacity, that is, E r ≈E c When the battery management unit further adjusts the battery pack according to the health status of the battery pack according to the formula Adjust the charging current to ensure that the battery is in good working condition at the end of charging and extend the battery's cycle life. During the energy supply period, the battery pack discharges according to the instructions of the intelligent control module. When the external load demand increases and the system determines that the electrochemical energy storage module needs to provide power, the battery pack outputs power according to the discharge strategy. The discharge current and voltage are dynamically adjusted by the battery management unit according to the load demand and the current state of the battery to ensure a stable supply of power. At the same time, the battery management unit monitors the battery pack's power, voltage, current and other parameters in real time, and feeds this information back to the intelligent control module so that the intelligent control module can make real-time adjustments to the energy balance and power supply strategy of the entire system.

[0044] The temperature sensor of the thermal management unit monitors the battery pack temperature T in real time. es When the battery pack temperature is detected to deviate from the appropriate operating temperature range [T min ,T max], the thermal management unit immediately sends a temperature warning message to the intelligent control module, and simultaneously starts the heat dissipation or heating measures to adjust the temperature. During the heat dissipation process, the thermal management unit dissipates the excess heat generated by the battery pack; during the heating process, it provides stable heat for the battery pack and determines the heat dissipation and heating heat according to the temperature change of the battery pack ΔT. ΔT is calculated by the formula Calculated, where Q p is the heat transferred from the solar thermal module to the battery pack, and t1 is the regulation time of the battery pack. For example, when the temperature of the battery pack is too high, that is, T es >T max When the temperature of the battery pack is too low, that is, T es <T min When the temperature of the battery pack is stable, the intelligent control module will control the solar thermal module to supply heat to the battery pack, and the thermal management unit will reduce the heat dissipation measures or start the heating element accordingly to ensure that the temperature of the battery pack is stable in an appropriate range and maintain the optimal performance of the battery.

[0045] The intelligent control module continuously collects a large amount of data such as light intensity, ambient temperature, grid electricity price, power and temperature of the electrochemical energy storage module, thermal energy storage capacity of the photothermal module and the concentration status. For example, the light intensity sensor monitors the solar radiation intensity in real time, providing a direct basis for the adjustment of the concentration unit; the power and temperature sensors of the electrochemical energy storage module feed back the real-time status information of the battery pack to the intelligent control module so that it can adjust the charging and discharging strategy and thermal management measures in time. The intelligent control module uses the built-in thermal-electric bidirectional feedback regulation algorithm to process and analyze these data in real time, accurately grasp the operating status and energy flow of each module of the system, and through the study and analysis of historical data, the intelligent control module can also predict the energy demand and supply trend of the system in the future, formulate an optimized energy management strategy in advance, and improve the operating efficiency and stability of the system. In addition, when the real-time temperature T of the electrochemical energy storage module es Higher than the upper limit of the suitable working temperature range T max When the temperature is high, the intelligent control module immediately starts the thermal control unit, controls the photothermal module to reduce the heat output, and adjusts the focusing area S of the focusing unit. The focusing area is calculated according to the formula Adjustment is made, where S0 is the initial focusing area. By gradually reducing the focusing area, the heat transferred from the photothermal module to the electrochemical energy storage module is reduced, and a safety value S for reducing the focusing area is set. aq And S≤S aq When maintaining the focusing area S aq , to prevent the battery from overheating. In actual operation, when T es More than T maxWhen the temperature of the battery pack drops to a suitable range as soon as possible, the intelligent control module responds quickly, calculates the adjustment value of the focusing area according to the formula, drives the motor of the focusing unit to adjust the angle of the focusing lens array, reduces the focusing area, and controls the heat storage unit to reduce the heat supply to the electrochemical energy storage module, ensuring that the battery pack temperature drops to a suitable range as soon as possible to protect the battery performance. es <T min And the system has power demand E d When the intelligent control module starts the electric control heat-assisted power generation mode, it first determines the thermal energy Q stored in the solar thermal module. th Whether the auxiliary power generation conditions are met, if Q th ≥E d ×k, the solar thermal module is controlled to supply heat to the electrochemical energy storage module to assist in power generation, and the focusing unit is adjusted to increase the focusing area S. According to the formula Concentrate light when T es <T min And the power demand is E d When the intelligent control module detects that the solar thermal module has stored enough heat energy during the day to meet the auxiliary power generation conditions, it starts the heat supply auxiliary power generation process, and the electric energy generated by the heat storage unit is supplemented to the electrochemical energy storage module or directly supplied to the load. At the same time, the thermal energy reserve is further supplemented to achieve intelligent complementarity between thermal energy and electric energy and maintain the stable energy supply of the system. In addition to the thermal-electric bidirectional feedback regulation, the intelligent control module is also responsible for coordinating the collaborative work between the modules of the system. In terms of energy distribution, the intelligent control module formulates the optimal energy distribution strategy based on the real-time energy demand and the energy storage status of each module. For example, in the industrial production process, if the industrial equipment has a large demand for high-temperature thermal energy, the intelligent control module will give priority to the energy of the solar thermal module and the electrochemical energy storage module, and convert the energy into the high-temperature and high-pressure thermal energy required by the equipment through the heat exchanger of the heat exchange and energy supply module, and ensure the stability and continuity of the energy supply. At the same time, the intelligent control module will pay close attention to the focusing state and thermal conversion efficiency of the solar thermal module and the battery health status and charging and discharging status of the electrochemical energy storage module, and adjust the working parameters of each module in time to ensure that the overall system operates in the best state and ensure the reliability of energy supply.

[0046] like Figure 1 As shown, the present embodiment provides a valley electrochemical heat storage energy supply system based on photothermal coupling, and the specific steps of performing heat storage energy supply are:

[0047] During the day, the solar thermal module operates: the light sensor of the concentrating unit monitors the changes in the sun's position and intensity, and adjusts the concentrating mirror array to make the sunlight incident on the thermal conversion unit at the best angle to ensure the light intensity density;

[0048] The heat conversion unit absorbs the focused solar energy and converts it into heat energy. Its built-in temperature sensor monitors the temperature change and feeds back to the intelligent control module to determine whether the light-to-heat conversion process is stable and efficient and the focusing effect is good.

[0049] The heat storage unit receives the heat energy transmitted by the heat conversion unit, absorbs heat to store the heat energy, and continuously monitors the heat energy storage amount and temperature changes. When the intelligent control module issues a heating instruction, the heat storage unit supplies heat to the electrochemical energy storage module to assist the electrochemical reaction, and provides basic heat energy for the heat exchange and energy supply module.

[0050] During off-peak hours, the battery management unit of the electrochemical energy storage module starts the charging process according to the instructions of the intelligent control module, calculates the charging current based on the off-peak electricity price, the current remaining power of the battery pack, and the off-peak duration, and adjusts the charging current as the charging process progresses. When it approaches the rated capacity, it is further adjusted according to the health status of the battery pack to avoid overcharging.

[0051] During the energy supply period, the battery pack discharges according to the instructions of the intelligent control module. The discharge current and voltage are dynamically adjusted by the battery management unit according to the load demand and the current state of the battery. The battery pack's power, voltage, current and other parameters are monitored in real time and fed back to the intelligent control module.

[0052] The temperature sensor of the thermal management unit monitors the battery pack temperature in real time. When it deviates from the appropriate operating temperature range, it initiates cooling or heating measures to adjust the temperature to ensure that the battery pack temperature is stable within the appropriate range.

[0053] The intelligent control module coordinates the various modules of the system to work together, formulates energy allocation strategies based on energy demand and the energy storage status of each module, and ensures that the overall system operates in the best state. By executing the thermal-electric bidirectional feedback regulation algorithm, when the temperature of the electrochemical energy storage module is higher than the appropriate upper limit, the photothermal module is controlled to reduce heat output and adjust the focusing area of ​​the focusing unit; when the temperature is lower than the appropriate lower limit and there is a demand for electrical energy, if the thermal energy of the photothermal module meets the conditions, the electrically controlled thermal assisted power generation mode is started, the photothermal module is controlled to provide heat to assist power generation and the focusing unit is adjusted to increase the focusing area;

[0054] The heat exchanger receives energy from the photothermal module and the electrochemical energy storage module, converts the input energy into output heat energy according to different load requirements, and provides adaptive energy;

[0055] When the energy output of the photothermal module and the electrochemical energy storage module fluctuates during the system energy supply process, the energy buffer unit absorbs and stores excess thermal energy and releases and supplements it when thermal energy is insufficient, thereby ensuring the smooth output of thermal energy by the heat exchanger and maintaining power supply stability.

[0056] In summary, this embodiment describes in detail the operation process of a valley electrochemical heat storage energy supply system based on photothermal coupling, fully demonstrates the close synergy between the modules and the key regulation function of the intelligent control module, and realizes stable and reliable energy supply under different working conditions.

[0057] Embodiment 2

[0058] This example focuses on the application practice of the solar-thermal coupled valley electrochemical heat storage energy supply system in the industrial field, and elaborates on the operating mechanism and synergy of each module of the system in an industrial production environment, demonstrating how to effectively integrate solar-thermal and valley electricity energy to meet the complex and changeable energy needs of industry.

[0059] In industrial applications, the focusing unit of the photothermal module will accurately focus the scattered sunlight onto the heat conversion unit to ensure the high efficiency of the photothermal conversion. The heat conversion unit quickly converts the absorbed light energy into heat energy and transmits it to the heat storage unit in real time. The heat storage unit stores heat on the one hand, and on the other hand, according to the instructions of the intelligent control module, when industrial production needs it, such as chemical reaction heating, metal processing preheating and other links, it stably outputs heat energy to the heat exchange and energy supply module, providing a basic heat source for industrial production and ensuring that the temperature of the production process meets the requirements.

[0060] During off-peak hours, the battery management unit of the electrochemical energy storage module accurately calculates the charging current and voltage based on the scheduling of the intelligent control module, the off-peak electricity price and the real-time power status of the battery pack, to achieve efficient charging and store electrical energy for backup. During peak industrial production electricity consumption or when the solar thermal module is insufficient, the battery pack discharges according to instructions to power the production equipment and maintain production continuity. The thermal management unit monitors the battery temperature in real time. When the temperature deviates from the appropriate range, it quickly takes heat dissipation or heating measures to prevent the battery performance from being affected by temperature, ensure that the battery is always in good working condition, and guarantee the stable supply and storage of electricity.

[0061] The intelligent control module comprehensively collects energy demand information on the industrial production line, thermal energy storage and conversion data of the photothermal module, power and temperature conditions of the electrochemical energy storage module, etc. Through the built-in thermal-electric bidirectional feedback regulation algorithm, during the production process, the energy output of the photothermal module and the electrochemical energy storage module are dynamically allocated according to real-time energy demand. When the demand for thermal energy in the production link increases, the intelligent control module instructs the photothermal module to increase the heat output. If the photothermal energy is insufficient, the electrochemical energy storage module is coordinated to supplement the electrical-thermal energy conversion. When the demand for electrical energy is urgent, the battery pack is given priority to be discharged reasonably, and the energy allocation strategy of the photothermal module is adjusted at the same time to ensure the accurate, stable and efficient energy supply in all links of industrial production.

[0062] The heat exchange and energy supply module uses a heat exchanger to accurately convert the energy from the photothermal module and the electrochemical energy storage module into an appropriate form of thermal energy for output according to the temperature and energy requirements of different industrial production processes. The energy buffer unit quickly releases or stores energy when the energy supply fluctuates to ensure the stability of the heat energy output of the heat exchanger, avoid interference with industrial production due to energy fluctuations, and maintain efficient and stable production operations.

[0063] This embodiment fully demonstrates the performance of the valley electrochemical heat storage energy supply system based on photothermal coupling in the industrial field. The modules work closely together to achieve the deep integration and efficient utilization of photothermal and valley electricity energy in industrial production, effectively respond to the complex energy needs of industry, and significantly improve the stability and reliability of energy supply.

[0064] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A valley electrochemical heat storage energy supply system based on photothermal coupling, characterized in that: The components of the system include: photothermal module, electrochemical energy storage module, intelligent control module, heat exchange and energy supply module; The photothermal module includes a light-collecting unit, a heat conversion unit and a heat storage unit, which are used to collect solar energy and convert it into heat energy for storage; The electrochemical energy storage module includes a battery pack, a battery management unit and a thermal management unit, which are responsible for the storage and release of electrical energy, and also monitor and regulate the battery temperature; The intelligent control module includes a thermal control electric unit and an electrically controlled heat-assisted power generation unit, and uses a thermal-electric bidirectional feedback regulation algorithm to dynamically adjust the heat output and focusing parameters of the photothermal module according to the temperature state and power demand of the electrochemical energy storage module; The thermal-electric bidirectional feedback regulation algorithm uses the real-time temperature T es , set the lower limit of the suitable working temperature range to T min , the upper limit is T max ; When T es >T max When the light-thermal module is controlled to reduce the heat output, the focusing area S of the focusing unit is adjusted to Focusing is performed, where S0 is the initial focusing area, by reducing the focusing area and setting the focusing area reduction safety value S aq And S≤S aq When maintaining the focusing area S aq , reduce the heat transferred from the solar thermal module to the electrochemical energy storage module to prevent the battery from overheating; When T es <T min And the power demand is E d When the electric control thermal auxiliary power generation mode is started, according to the thermal energy Q stored in the solar thermal module th , when Q th ≥E d ×k, k is the heat-electricity conversion coefficient. The intelligent control module controls the photothermal module to supply heat to the electrochemical energy storage module to assist in power generation. At the same time, the focusing unit is adjusted to increase the focusing area S. Concentrate light to obtain more solar energy and convert it into thermal energy to meet the demand for additional electricity; The heat exchange and energy supply module includes a heat exchanger and an energy buffer unit, has an energy buffer function, and provides adaptive energy according to different load requirements.

2. According to claim 1, a valley electrochemical heat storage energy supply system based on photothermal coupling is characterized in that: The photothermal module includes a light collecting unit, a heat conversion unit and a heat storage unit, wherein: The focusing unit is composed of a focusing lens array, which adjusts the angle in real time according to the control instructions transmitted by the intelligent control module to focus the scattered sunlight onto the heat conversion unit; The heat conversion unit collects and focuses solar energy, converts the light energy into heat energy, and transmits the heat energy to the heat storage unit in real time; The heat storage unit temporarily stores the heat energy generated by the heat conversion unit, on the one hand waiting for instructions from the intelligent control module to supply heat to the electrochemical energy storage module as needed to assist the electrochemical reaction; on the other hand continuously providing basic heat energy for the heat exchange and energy supply module.

3. According to claim 1, a valley electrochemical heat storage energy supply system based on photothermal coupling is characterized in that: The electrochemical energy storage module comprises a battery pack, a battery management unit and a thermal management unit, wherein: The battery pack is charged according to the current and voltage parameters regulated by the battery management unit, stores electric energy, and discharges according to instructions when supplying energy; The battery management unit monitors the battery pack power, voltage, and current parameters in real time, communicates bidirectionally with the intelligent control module, receives control instructions to optimize the charging and discharging strategy, and feeds back the battery status information; The thermal management unit has a built-in temperature sensor. When the temperature of the battery pack deviates from the suitable operating temperature range {T min , T max }, a temperature warning is sent to the intelligent control module in real time, and cooling and heating measures are started according to instructions to adjust the battery temperature, and heat exchange is carried out with the photothermal module for collaborative temperature control.

4. The valley electrochemical heat storage energy supply system based on photothermal coupling according to claim 3 is characterized in that: The thermal management unit of the electrochemical energy storage module uses the heat Q transferred to the battery pack by the photothermal module when cooperating with the photothermal module to control the temperature. p , when the battery pack temperature T es When the temperature deviates from the suitable range, according to the formula Calculate the battery pack temperature change ΔT to accurately control the heat dissipation and heating measures to ensure that the battery pack temperature is stable in an appropriate range, where P s is the heat dissipation power of the thermal management unit itself, c b is the specific heat capacity of the battery pack, m b is the mass of the battery pack, and t1 is the regulation time of the battery pack.

5. The valley electrochemical heat storage energy supply system based on photothermal coupling according to claim 3 is characterized in that: The battery management unit of the electrochemical energy storage module uses the electricity price C during the off-peak period when regulating the charging of the battery pack. g and the current remaining battery charge E r , according to the formula Calculate the charging current I, where t is the valley time, E c The rated capacity of the battery pack is used to optimize the charging cost and give priority to fully charging the battery during the valley power stage. r ≈E c When the battery is in good condition, Adjust the charging current, where I0 is the initially set charging current, to avoid damage to the battery due to overcharging.

6. The valley electrochemical heat storage energy supply system based on photothermal coupling according to claim 1 is characterized in that: The heat exchange and functional module includes a heat exchanger and an energy buffer unit, wherein: One end of the heat exchanger is connected to the thermal storage unit of the photothermal module and the electrochemical energy storage module. When facing different load requirements, the heat exchanger converts input energy into output heat energy according to the instructions of the intelligent control module; During the system energy supply process, when the energy output of the photothermal module and the electrochemical energy storage module fluctuates, the energy buffer unit maintains the stability of power supply, that is, it absorbs and stores when there is excess thermal energy, and releases and supplements when there is insufficient thermal energy, thereby ensuring the stability of the heat exchanger's output of thermal energy.

7. The valley electrochemical heat storage energy supply system based on photothermal coupling according to claim 6 is characterized in that: The heat exchange and function module adopts a heat exchanger, according to the real-time temperature demand T fed back by the load end r and the required energy power P r To control the output, the heat exchange efficiency of the heat exchanger is η, when the heat energy provided by the photothermal module is Q th , the electric energy provided by the electrochemical energy storage module is E es , satisfying Q th ×η+E es ≥P r When the energy is not satisfied, the intelligent control module coordinates the module to increase the energy output to ensure stable energy supply. In the energy supply process, the energy buffer unit Energy storage, where E b Reserve energy for the buffer unit, E max It is the maximum energy storage capacity of the buffer unit to cope with energy supply fluctuations.

8. The valley electrochemical heat storage energy supply system based on photothermal coupling according to claim 1 is characterized in that: The intelligent control module includes a thermal control electric unit and an electric control thermal auxiliary power generation unit, wherein: When the temperature of the electrochemical energy storage module is high and affects the energy storage performance, the intelligent control module starts the thermal control unit to reduce the battery temperature and protect the battery performance by adjusting the heat output of the photothermal module; When the demand for electricity is at a peak and the electrochemical energy storage is insufficient, the electrically controlled thermal auxiliary power generation unit utilizes the thermal energy stored in the photothermal module to perform auxiliary power generation, thereby realizing intelligent complementarity between thermal energy and electrical energy.

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