CN117996803B - Multi-energy complementary energy storage system and method based on power grid - Google Patents

Abstract

The application discloses a power grid-based multi-energy complementary energy storage system and a method, and relates to the technical field of energy storage systems, wherein the system comprises an energy output module, an energy storage module, a conversion management module and an output module; the energy output module comprises a photovoltaic power generation unit, a wind power generation unit, a thermal power generation unit and a complementary unit; the photovoltaic power generation unit, the wind power generation unit and the thermal power generation unit are respectively connected with the input end of the complementary unit, and the output end of the complementary unit is connected with the input end of the energy storage module; the output end of the energy storage module is connected with the conversion management module; the intelligent sensing and decision making module is also included; the intelligent sensing and decision-making module dynamically adjusts and controls the working modes of each energy output unit according to the multiple information of real-time weather, energy demand and local real-time electricity price so as to realize the efficient utilization and optimal configuration of energy; the energy storage mode can be switched according to the local real-time electricity price, so that the technical effect of economic benefit is achieved.

Description

Multi-energy complementary energy storage system and method based on power grid

Technical Field

The invention relates to the technical field of energy storage systems, in particular to a power grid-based multi-energy complementary energy storage system and method.

Background

The production and living energy of human beings currently mainly depends on fossil energy sources including natural-formed and non-renewable resources such as petroleum, natural gas, coal and the like. Humans are facing the crisis of exhaustion of fossil energy, and the problem of energy shortage is one of the problems that humans are urgent to solve at present. Therefore, renewable energy sources are being developed vigorously in countries around the world. The solar energy and the wind energy have strong complementarity in time and region, and are mainly represented by strong sunlight intensity in daytime and weak wind intensity at night, but the wind energy is reinforced due to large temperature difference change of the ground surface. In summer, the sunlight intensity is high and the wind is small; in winter, the sunlight intensity is weak and the wind is strong. Therefore, the wind-solar complementary power generation has better matching property on resources due to the time complementarity of solar energy and wind energy.

However, the outdoor weather and summer temperatures are very high and the winter temperatures are very low, the energy storage battery in the existing wind-solar complementary power generation system cannot cope with severe weather conditions, the use requirements of the battery at high and low temperatures cannot be met, the battery is easy to lose efficacy when the battery is used at high temperature or low temperature, and the energy storage mode cannot be switched according to the local real-time electricity price so as to realize economic benefit, so that a multifunctional complementary energy storage system based on a power grid is required to solve the problems.

Disclosure of Invention

The application solves the technical problem that the existing multi-energy complementary energy storage system in the prior art is difficult to switch the energy storage mode according to the local real-time electricity price so as to realize economic benefit by providing the multi-energy complementary energy storage system and the method based on the power grid; the technical effect of energy storage mode switching according to local real-time electricity price to realize economic benefit is realized.

The application provides a power grid-based multi-energy complementary energy storage system, which comprises an energy output module, an energy storage module, a conversion management module and an output module; the energy output module comprises a photovoltaic power generation unit, a wind power generation unit, a thermal power generation unit and a complementary unit; the photovoltaic power generation unit, the wind power generation unit and the thermal power generation unit are respectively connected with the input end of the complementary unit, and the output end of the complementary unit is connected with the input end of the energy storage module; the output end of the energy storage module is connected with the conversion management module; the conversion management module comprises a power conversion system and an energy management system, wherein the power conversion system converts electric energy from different sources into a form suitable for storage or integration into a power grid, and the energy management system monitors, controls and optimally schedules the multi-energy complementary system;

The intelligent sensing and decision making module is also included; the intelligent sensing and decision-making module dynamically adjusts and controls the working modes of each energy output unit according to the multiple information of real-time weather, energy demand and local real-time electricity price so as to realize efficient utilization and optimal configuration of energy.

Further, the photovoltaic power generation unit and the wind power generation unit receive real-time weather information including illumination intensity and wind speed through the intelligent sensing and decision module, and adjust the working state of the photovoltaic power generation unit and the wind power generation unit according to the information; the thermal power generation unit is used as a stable energy source to supply supplement when the photovoltaic power generation and the wind power generation cannot meet the requirements; the complementary unit can dynamically adjust the energy proportion received from each power generation unit according to the control signal of the intelligent sensing and decision module, and the energy is integrated and then is transmitted to the energy storage module for storage; the energy storage module flexibly stores and releases electric energy according to the real-time requirement of the power grid and the electricity price information;

And when the wind speed sensed by the intelligent sensing and decision making module is between 5 and 25m/s, controlling the wind power generation unit to operate and output energy.

Further, the energy storage module comprises a main body and a getter device, wherein the main body comprises a shell, an upper cover and an electrode assembly; the whole shell is a hollow cuboid with an upper opening, and the upper cover covers and seals the opening of the shell; an electrode assembly is stored inside the case; the electrode assembly is provided with a through cylindrical opening along the height direction, and a suction device is arranged in the cylindrical opening.

Further, the air suction device comprises an outer air suction structure and an inner air suction structure, and the inner air suction structure is positioned inside the outer air suction structure; the outer suction structure comprises an outer separation tube, the whole outer separation tube is a hollow round table body with a large upper end and a small lower end, the lower end of the outer separation tube is fixed at the center position of the inner wall of the bottom surface of the shell, and a gap exists between the outer wall of the outer separation tube and the electrode assembly; the outer partition tube is uniformly provided with a plurality of outer air suction ports, and the outer air suction ports are used for communicating the inner space of the outer partition tube with the outside of the outer partition tube; the number of the outer air suction ports is 8 to 15; the inside of the outer air suction port is blocked by a solid-phase inert blocking agent, and the melting point of the solid-phase inert blocking agent in the inside of the outer air suction port is 48-55 ℃; a plurality of annular getters are fixed in the outer partition tube along the height direction, and the annular getters are sleeved outside the inner gettering structure.

Further, the inner air suction structure comprises an inner separation tube, the whole inner separation tube is in a circular tube shape, the inner separation tube is fixed inside the outer separation tube, the top end of the inner separation tube is fixedly connected with the inner wall of the top end of the outer separation tube, and the bottom end of the inner separation tube is fixedly connected with the inner wall of the bottom end of the outer separation tube; an inner air suction port is uniformly formed in the inner partition pipe, a solid-phase inert plugging agent is plugged in the inner air suction port, and the melting point of the solid-phase inert plugging agent in the inner air suction port is 50-65 ℃; the number of the inner air inlets is 10 to 20; the inner partition tube is filled with powdery getter; a blocking net is fixed in the outer air suction port, and the diameter of a mesh of the blocking net is smaller than the diameter of particles in the powdery getter and is used for blocking the powdery getter; the diameter of the inner air suction port is 5 to 8 times of the particle diameter of the powdery getter.

Further, the inner air inlets are divided into a plurality of groups, the number of the inner air inlets in each group is two, and the two inner air inlets in the same group are symmetrically arranged; the number of groups of the inner air inlets is 5 to 10 after the inner air inlets are grouped, and the inner air inlets of each group are uniformly distributed along the axis of the inner partition pipe; the inner partition tube is horizontally fixed with a plurality of round partition plates, the inner partition tube is divided into a plurality of small spaces by the plurality of partition plates, the number of the partition plates is 1 less than the number of the groups of the inner air suction openings, the number of the small spaces in the inner partition tube is the same as the number of the groups of the inner air suction openings, a group of the inner air suction openings corresponds to each small space, and the group of the inner air suction openings are positioned at the bottom end positions in the corresponding small spaces.

Further, the inner side and the outer side of the inner air suction port are respectively and fixedly sealed with a pressure sensitive film, and a solid-phase inert plugging agent in the inner air suction port is positioned between the two pressure sensitive films; the melting point of the solid-phase inert plugging agent in the inner air suction opening close to the upper cover is larger than that of the solid-phase inert plugging agent in the inner air suction opening far away from the upper cover, and the pressure threshold value of the pressure sensitive film in the inner air suction opening close to the upper cover is larger than that of the pressure sensitive film in the inner air suction opening far away from the upper cover, so that after the temperature in the shell is increased and the air pressure value is increased, each small space in the inner partition tube is gradually communicated with the external environment from bottom to top, and the powdery getter in the small space flows out step by step.

Further, the air suction device further comprises a plurality of carrying-out assemblies, and the carrying-out assemblies are the same in number and in one-to-one correspondence with the inner air suction openings; the take-out assembly comprises an inner pull rope and a falling ball, the falling ball is positioned outside the inner partition pipe, one end of the inner pull rope is fixedly connected with the falling ball, the other end of the inner pull rope penetrates through the corresponding inner air suction port to enter the corresponding small space and is fixed on the inner wall of the corresponding small space, and the inner pull rope penetrates through the two pressure sensitive films in the corresponding inner air suction port in a sealing mode in an initial state.

Further, the carrying-out assembly further comprises a plurality of carrying-out bodies, the whole inner pull rope is spirally coiled in the corresponding small space in the initial state, and one end of the inner pull rope, which is far away from the falling ball, is fixed in the middle position of the inner wall of the top end in the small space; the two inner pull ropes in the same small space are not interfered with each other; the inner pull rope is fixedly provided with a plurality of carrying-out bodies, the whole carrying-out bodies are ellipsoids, the long axes of the carrying-out bodies are overlapped with the inner pull rope, and the diameter of the short axes of the carrying-out bodies is not larger than the opening radius of the inner air suction port; the number of the carrying-out bodies on the same inner pull rope is 5 to 10, and the volumes of the carrying-out bodies are different.

A power grid-based multi-energy complementary energy storage method, which is matched with the power grid-based multi-energy complementary energy storage system, comprising:

S1: ensuring that the energy output module, the energy storage module, the conversion management module, the output module and the intelligent perception and decision module are correctly connected and in a standby state;

S2: the intelligent sensing and decision-making module starts to work and collects weather information, energy demand data of the power grid and electricity price information in real time; these data are continuously monitored and updated to ensure that the system always makes decisions based on the most up-to-date information;

S3: according to the collected illumination intensity data, the intelligent sensing and decision module judges the running state of the photovoltaic power generation unit; when the illumination intensity is more than 600W/m, controlling the photovoltaic power generation unit to operate at full power; meanwhile, according to the wind speed data, when the wind speed is between 5m/s and 25m/s, the wind power generation unit is controlled to start and operate; the thermal power generation unit is used as a backup energy source, and when the photovoltaic power generation and the wind power generation cannot meet the power grid demand, the output power is increased according to the control of the energy management system;

S4: the complementary unit receives electric energy from the photovoltaic power generation unit, the wind power generation unit and the thermal power generation unit and dynamically adjusts the proportion of energy received from each power generation unit according to the control signals of the intelligent sensing and decision module; the complementary unit integrates the electric energy from different sources and then transmits the integrated electric energy to the energy storage module for storage or directly integrates the integrated electric energy into a power grid through the conversion management module;

S5: the energy storage module decides whether to store electric energy or release electric energy according to the real-time requirement of the power grid and the electricity price information; in a period of low electricity price and low energy demand, the surplus electric energy is stored; during periods of high electricity prices or large energy demands, the stored electrical energy is released to meet grid demands;

S6: the energy management system continuously monitors the running state of the whole multi-energy complementary energy storage system, including the output power of each power generation unit, the charge and discharge states of the energy storage modules and the real-time requirements of the power grid; according to the monitoring data and the electricity price information, the energy management system performs optimal scheduling, and adjusts the working mode of each power generation unit and the charging and discharging strategy of the energy storage module so as to realize efficient utilization of energy and economic operation of the system.

One or more technical schemes provided by the application have at least the following technical effects or advantages:

by providing a grid-based multi-energy complementary energy storage system comprising intelligent sensing and decision modules; the intelligent sensing and decision-making module dynamically adjusts and controls the working modes of each energy output unit according to the multiple information of real-time weather, energy demand and local real-time electricity price so as to realize the efficient utilization and optimal configuration of energy; the technical problem that the existing multi-energy complementary energy storage system in the prior art is difficult to switch the energy storage modes according to the local real-time electricity price so as to realize economic benefits is effectively solved; and further, the technical effect that the energy storage mode can be switched according to the local real-time electricity price so as to realize economic benefit is realized.

Drawings

FIG. 1 is a system schematic diagram of a grid-based multi-energy complementary energy storage system and method of the present invention;

FIG. 2 is a schematic diagram of an energy output module of the grid-based multi-energy complementary energy storage system and method of the present invention;

FIG. 3 is a schematic diagram of a conversion management module of the grid-based multi-energy complementary energy storage system and method of the present invention;

FIG. 4 is a schematic diagram of an energy storage module of the grid-based multi-energy complementary energy storage system and method of the present invention;

FIG. 5 is a block diagram of an energy storage module of the grid-based multi-energy complementary energy storage system and method of the present invention;

FIG. 6 is a schematic diagram of the external suction structure of the grid-based multi-energy complementary energy storage system and method of the present invention;

FIG. 7 is a schematic diagram of the internal gettering structure of the grid-based multi-energy complementary energy storage system and method of the present invention;

FIG. 8 is a schematic diagram of a powdered getter outflow for the grid-based multi-energy complementary energy storage system and method of the present invention;

FIG. 9 is a schematic diagram of divider plate positions of the grid-based multi-energy complementary energy storage system and method of the present invention;

FIG. 10 is a schematic diagram of the internal suction port structure of the grid-based multi-energy complementary energy storage system and method of the present invention;

FIG. 11 is a schematic diagram illustrating a graded outflow of a powdered getter from a grid-based multi-energy complementary energy storage system and method of the present invention;

FIG. 12 is a schematic diagram of the position of a take-out assembly of the grid-based multi-energy complementary energy storage system and method of the present invention;

FIG. 13 is a schematic diagram of a carry-out assembly of the grid-based multi-energy complementary energy storage system and method of the present invention;

FIG. 14 is a schematic diagram of the internal rope distribution of the grid-based multi-energy complementary energy storage system and method of the present invention.

In the figure:

The main body 100, the case 110, the upper cover 120, the electrode assembly 130, the getter device 200, the outer getter structure 210, the outer separator 211, the outer suction port 212, the annular getter 213, the inner getter structure 220, the inner separator 221, the inner suction port 222, the powdery getter 223, the partition plate 224, the pressure sensitive film 225, the take-out assembly 230, the inner string 231, the dropping ball 232, and the take-out body 233.

Detailed Description

In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings; the preferred embodiments of the present application are illustrated in the drawings, but the present application can be embodied in many different forms and is not limited to the embodiments described herein; rather, these embodiments are provided so that this disclosure will be thorough and complete.

It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right", and the like are used herein for illustrative purposes only and do not represent the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Embodiment one: as shown in fig. 1, 2 and 3, the power grid-based multi-energy complementary energy storage system of the application comprises an energy output module, an energy storage module, a conversion management module and an output module; the energy output module comprises a photovoltaic power generation unit, a wind power generation unit, a thermal power generation unit and a complementary unit; the photovoltaic power generation unit, the wind power generation unit and the thermal power generation unit are respectively connected with the input end of the complementary unit, and the output end of the complementary unit is connected with the input end of the energy storage module; the output end of the energy storage module is connected with the management module in a conversion way; the conversion management module comprises a power conversion system and an energy management system, wherein the power conversion system converts electric energy from different sources into a form suitable for storage or incorporation into a power grid, and the energy management system monitors, controls and optimally schedules the multi-energy complementary system.

The power grid-based multi-energy complementary energy storage system also comprises an intelligent sensing and decision module; the intelligent sensing and decision-making module can dynamically adjust and control the working modes of each energy output unit according to the multiple information of real-time weather, energy demand and local real-time electricity price so as to realize the efficient utilization and optimal configuration of energy; the photovoltaic power generation unit and the wind power generation unit are greatly influenced by weather conditions, so that the photovoltaic power generation unit and the wind power generation unit receive real-time weather information including illumination intensity and wind speed through the intelligent sensing and decision-making module and adjust the working state of the photovoltaic power generation unit and the wind power generation unit according to the information. For example, under the condition of sufficient illumination and moderate wind speed, the photovoltaic power generation unit and the wind power generation unit are operated in full power so as to meet the energy requirement of a power grid; in the case of severe weather, insufficient illumination, too low or too high wind speeds, they will reduce the output power or temporarily stop operation to avoid wasting energy and damaging the equipment. The thermal power generation unit is used as a stable energy source to supply supplement when the photovoltaic power generation and the wind power generation cannot meet the requirements; specifically, when the illumination intensity perceived by the intelligent perception and decision module is more than 600W/m, the photovoltaic power generation unit is controlled to operate and output energy, and when the wind speed perceived by the intelligent perception and decision module is between 5m/s and 25m/s, the wind power generation unit is controlled to operate and output energy; the complementary unit can dynamically adjust the energy proportion received from each power generation unit according to the control signal of the intelligent sensing and decision module, and the energy is integrated and then is transmitted to the energy storage module for storage; the energy storage module can flexibly store and release electric energy according to the real-time requirement of the power grid and the electricity price information. For example, during periods of low electricity prices and low energy demands, the energy storage module stores excess electrical energy; and in the period of high electricity price or the period of high energy demand, the energy storage module releases the stored electric energy so as to meet the demand of the power grid and reduce the running cost.

Illustrating: it is assumed that at noon of a certain day, the illumination is sufficient and the wind speed is moderate, at which time both the photovoltaic power generation unit and the wind power generation unit are in an optimal working state and are operated at full power. However, the energy demand of the grid is still large due to the positive electricity peak hours at this time. Under the condition, the intelligent sensing and decision-making module judges that the thermal power generation unit needs to increase the output power to meet the requirement according to the real-time weather information and the power grid requirement data. Meanwhile, the energy storage module releases part of stored electric energy under the condition of higher electricity price so as to lighten the load of the power grid and reduce the running cost. The whole process is carried out under the monitoring and optimized scheduling of the energy management system so as to ensure the efficient utilization of energy and the stable operation of the system.

The steps of the multi-energy complementary energy storage system based on the power grid in the embodiment of the application are as follows when in actual operation:

S1: ensuring that all modules (energy output module, energy storage module, conversion management module, output module and intelligent sensing and decision module) are correctly connected and in standby state.

S2: the intelligent sensing and decision-making module starts to work and collects weather information (including illumination intensity and wind speed), energy demand data of the power grid and electricity price information in real time; these data are continuously monitored and updated to ensure that the system always makes decisions based on the most up-to-date information.

S3: according to the collected illumination intensity data, the intelligent sensing and decision module judges the running state of the photovoltaic power generation unit; when the illumination intensity is more than 600W/m, controlling the photovoltaic power generation unit to operate at full power; meanwhile, according to the wind speed data, when the wind speed is between 5m/s and 25m/s, the wind power generation unit is controlled to start and operate; when the photovoltaic power generation and the wind power generation cannot meet the power grid demand, the thermal power generation unit is used as a backup energy source, and the output power is increased according to the control of the energy management system.

S4: the complementary unit receives electric energy from the photovoltaic power generation unit, the wind power generation unit and the thermal power generation unit and dynamically adjusts the proportion of energy received from each power generation unit according to the control signals of the intelligent sensing and decision module; the complementary unit integrates the electric energy from different sources and then transmits the integrated electric energy to the energy storage module for storage or directly integrates the integrated electric energy into the power grid through the conversion management module.

S5: the energy storage module decides whether to store electric energy or release electric energy according to the real-time requirement of the power grid and the electricity price information; in a period of low electricity price and low energy demand, the surplus electric energy is stored; during periods of high electricity prices or high energy demands, the stored electrical energy is released to meet grid demands.

S6: the energy management system continuously monitors the running state of the whole multi-energy complementary energy storage system, including the output power of each power generation unit, the charge and discharge states of the energy storage modules, the real-time requirements of the power grid and the like; according to the monitoring data and the electricity price information, the energy management system performs optimal scheduling, and adjusts the working mode of each power generation unit and the charging and discharging strategy of the energy storage module so as to realize efficient utilization of energy and economic operation of the system.

The technical scheme provided by the embodiment of the application at least has the following technical effects or advantages:

1. through intelligent perception and decision-making module, the system can adjust the working state of each energy output unit according to weather, energy demand and electricity price information in real time, thereby ensuring that energy can be efficiently utilized under various conditions.

2. The thermal power generation unit is used as a stable energy source, and is used for supplying power when the requirements of photovoltaic power generation and wind power generation cannot be met, so that the stable operation of the power grid is ensured.

3. The energy storage module can flexibly store and release electric energy according to the real-time requirement and electricity price information of the power grid, which is not only beneficial to balancing the load of the power grid, but also reduces the running cost and realizes higher economic benefit.

4. The energy management system continuously monitors the running state of the whole multi-energy complementary energy storage system, and performs optimized scheduling according to the monitoring data and the electricity price information, so that the running efficiency and the economy of the system are further improved.

Embodiment two: in the process of recycling the energy storage module, gas is generated due to various reasons such as decomposition of electrolyte, exceeding of internal moisture and the like, so that the cycle life and the multiplying power performance are deteriorated, for example, chinese patent publication No. CN116387641B discloses an energy storage device, the gas generated by the energy storage device can be absorbed along a first gas outlet through a getter filled in a cavity of a gas suction structure, the problem that the energy storage device expands due to the generation of the gas is reduced, but the generated gas is firstly contacted with the surface of the getter and is difficult to contact with the internal getter, so that the utilization rate of the getter is poor; the embodiment of the application is optimized to a certain extent on the basis of the embodiment and the prior art.

As shown in fig. 4 and 5, the energy storage module includes a body 100 and a getter device 200, the body 100 including a case 110, an upper cover 120, and an electrode assembly 130; the whole shell 110 is a hollow cuboid with an upper opening, and the upper cover 120 covers and seals the opening of the shell 110; the case 110 stores therein an electrode assembly 130; the electrode assembly 130 includes a positive plate, a negative plate, and a separator that are stacked together, and the separator is located between the positive plate and the negative plate, and the ends of the positive plate and the negative plate each have a tab to form a positive tab and a negative tab of the energy storage module. The positive electrode lug and the negative electrode lug can be positioned at the same end of the electrode assembly 130 or at different ends of the electrode assembly 130, and when the positive electrode lug and the negative electrode lug are positioned at the same end of the electrode assembly 130, the positive electrode lug and the negative electrode lug are respectively connected with a positive electrode terminal and a negative electrode terminal on the upper cover 120 so as to realize the output of electric energy of the electrode assembly 130 through the positive electrode terminal and the negative electrode terminal; when the positive electrode tab and the negative electrode tab are positioned at two ends of the electrode assembly 130, one of the positive electrode tab and the negative electrode tab is connected with the electrode terminal included in the upper cover 120, and the other is connected with the electrode terminal on the bottom of the housing 110, so that the output of the electric energy of the electrode assembly 130 is realized through the electrode terminal of the upper cover 120 and the electrode terminal on the bottom of the housing 110, which is not described in detail herein; the electrode assembly 130 is provided with a through cylindrical opening along the height direction, the cylindrical opening is internally provided with a getter device 200, and the cylindrical opening of the electrode assembly 130 is formed when the electrode assembly 130 comprises a pole piece and a separator which are laminated and then wound.

Preferably, the upper cover 120 is provided with an explosion-proof valve for exhausting the gas in the housing 110 to improve the safety of the energy storage module during use, and a liquid injection hole for injecting the electrolyte into the housing 110 of the energy storage module.

As shown in fig. 5 and 6, the getter device 200 includes an outer getter structure 210 and an inner getter structure 220, and the inner getter structure 220 is positioned inside the outer getter structure 210; the outer suction structure 210 comprises an outer separation tube 211, wherein the whole outer separation tube 211 is a hollow truncated cone with a large upper end and a small lower end, the lower end of the outer separation tube 211 is fixed at the center position of the inner wall of the bottom surface of the shell 110, and a gap exists between the outer wall of the outer separation tube 211 and the electrode assembly 130; the outer partition tube 211 is uniformly provided with a plurality of outer air inlets 212, and the outer air inlets 212 are used for communicating the inner space of the outer partition tube 211 with the outside of the outer partition tube 211; the number of the outer air inlets 212 is 8 to 15; the inside of the outer air suction port 212 is blocked with a solid-phase inert blocking agent, and the melting point of the solid-phase inert blocking agent in the inside of the outer air suction port 212 is 48-55 ℃; a plurality of annular getters 213 are fixed in the outer separator 211 in the height direction, and the annular getters 213 are sleeved outside the inner getter structure 220.

As shown in fig. 7, the inner air suction structure 220 includes an inner partition tube 221, the inner partition tube 221 is integrally formed in a circular tube shape, the inner partition tube 221 is fixed inside the outer partition tube 211, the top end of the inner partition tube 221 is fixedly connected with the top end inner wall of the outer partition tube 211, and the bottom end of the inner partition tube 221 is fixedly connected with the bottom end inner wall of the outer partition tube 211; an inner air suction port 222 is uniformly formed on the inner partition pipe 221, a solid-phase inert plugging agent is plugged in the inner air suction port 222, and the melting point of the solid-phase inert plugging agent in the inner air suction port 222 is 50-65 ℃; the number of the inner air inlets 222 is 10 to 20; the inner separator 221 is filled with a powdery getter 223; a blocking net is fixed in the outer air suction port 212, and the diameter of the net hole of the blocking net is smaller than the diameter of the particles in the powdery getter 223, so as to block the powdery getter 223; the diameter of the inner suction port 222 is 5 to 8 times the diameter of the particles in the powdery getter 223.

Preferably, the annular getter 213 and the powdered getter 223 are each comprised of activated carbon particles.

As shown in fig. 7 and 8, the temperature of the energy storage module is abnormal during use, so that after the solid-phase inert plugging agent in the outer air suction port 212 melts and flows out, the annular getter 213 performs the gettering operation, if the temperature continues to rise at this time, the amount of gas generated in the housing 110 will increase, after the temperature rises, the solid-phase inert plugging agent in the inner air suction port 222 melts and flows out, and after the solid-phase inert plugging agent melts and flows out, the powder getter 223 in the inner partition tube 221 flows out under the action of gravity and performs the gettering operation, so that the service life of the energy storage module is prolonged.

Through setting up getter device 200, including outer getter structure 210 and interior getter structure 220, realized the hierarchical function of breathing in, when the temperature is unusual to rise, the solid phase inert plugging agent in outer induction port 212 and the interior induction port 222 melts in proper order, releases annular getter 213 and likepowder getter 223 and carries out the operation of breathing in for the efficiency of breathing in is showing and promotes, can handle the inside gas pressure that produces of energy storage module under the high temperature environment better.

In the operation process, through carrying out simulation to the energy storage module many times, the internal short circuit risk of the energy storage module is obviously increased when 60 ℃ under the conventional environment, and the service life is shortened. In the life simulation of the energy storage module (the lithium battery is selected as the experimental object) in the prior art and the energy storage module in the embodiment, wherein the number of charge-discharge cycles is set to be two thousand times, the depth of discharge is controlled to be between 60% and 80%, the working environment temperature is 25 ℃, the simulation experiment is performed by using the established battery model and the set use conditions, in the simulation process, the change of key performance parameters such as capacity attenuation, internal resistance increase and the like of the battery needs to be recorded, due to the action of the air suction device 200, the annular air suction agent 213 can be released to perform air suction operation when the temperature reaches 50 ℃, and when the temperature continues to rise to 65 ℃, the solid-phase inert blocking agent in the inner air suction port 222 is melted, and the powdery air suction agent 223 is released to perform further air suction. In this way, the energy storage module of the present embodiment can maintain a low internal gas pressure even in a high temperature environment, thereby significantly reducing the risk of short circuits and prolonging the service life. Experimental data shows that under the same use conditions, the service life of the energy storage module in the embodiment is prolonged by 15% to 20% compared with the prior scheme.

It should be noted that the measurement of the usage time provided herein is based only on the process under the set conditions in the embodiment, and the usage time in the actual process may be affected by other factors, such as the ambient temperature, the model and the batch of the energy storage module, etc.

The technical scheme provided by the embodiment of the application at least has the following technical effects or advantages:

1. by providing an explosion-proof valve in the upper cover 120, gas can be timely discharged when the internal pressure of the energy storage module is too high, thereby reducing explosion risk.

2. Through the design of the air suction device 200, the air generated in the energy storage module can be timely absorbed when the temperature is abnormal, and the risk of internal short circuit is reduced, so that the service life of the energy storage module is prolonged.

3. By arranging solid-phase inert plugging agents with different melting points in the outer air suction port 212 and the inner air suction port 222, the graded air suction function at different temperatures is realized, and the design ensures that the energy storage module can better adapt to temperature changes in different working environments, and the application range of the energy storage module is widened.

4. The powder getter 223 can flow out of the inner air suction port 222 to perform air suction, so that the contact area between the powder getter 223 and the air is larger, the air suction efficiency is higher, and the air pressure generated in the energy storage module in a high-temperature environment is better reduced.

Embodiment III: in the above embodiment, if the solid inert blocking agent in the inner air inlet 222 is melted, the powder getter 223 is communicated with the external environment, so that the utilization rate of the powder getter 223 is low; the embodiment of the application is optimized to a certain extent on the basis of the embodiment.

As shown in fig. 9, the internal air inlets 222 are divided into a plurality of groups, and the number of the internal air inlets 222 in each group is two, and the two internal air inlets 222 in the same group are symmetrically arranged; the number of groups of the inner air inlets 222 is 5 to 10, and the inner air inlets 222 of each group are uniformly distributed along the axis of the inner partition pipe 221; a plurality of circular partition plates 224 are horizontally fixed inside the inner partition pipe 221, the plurality of partition plates 224 partition the inner partition pipe 221 into a plurality of small spaces, the number of the partition plates 224 is 1 less than the number of the groups of the inner air inlets 222, so that the number of the small spaces inside the inner partition pipe 221 is the same as the number of the groups of the inner air inlets 222, a group of inner air inlets 222 corresponds to each small space, and the group of inner air inlets 222 are positioned at the bottom end positions inside the corresponding small spaces.

As shown in fig. 10 and 11, the inner side and the outer side of the inner air suction port 222 are respectively and hermetically fixed with a pressure sensitive film 225, and the solid-phase inert plugging agent in the inner air suction port 222 is positioned between the two pressure sensitive films 225; the pressure sensitive membrane 225 is designed to rupture or break upon reaching a pressure threshold to release pressure or trigger a response, as is known in the art; the pressure threshold value of the pressure sensitive film 225 is not greater than the instruction information about the rated air pressure threshold value provided in the specification of the energy storage module product, and the rated air pressure threshold value is determined according to the actual use condition; the melting point of the solid-phase inert plugging agent in the inner air suction port 222 close to the upper cover 120 is greater than that of the solid-phase inert plugging agent in the inner air suction port 222 far away from the upper cover 120, the pressure threshold of the pressure sensitive film 225 in the inner air suction port 222 close to the upper cover 120 is greater than that of the pressure sensitive film 225 in the inner air suction port 222 far away from the upper cover 120, so that after the temperature in the shell 110 rises and the air pressure value increases, each small space in the inner partition tube 221 is gradually communicated with the external environment from bottom to top, and the powdery getter 223 in the small space flows out step by step; through the same cooperation of pressure sensitive membrane 225 and solid phase inert plugging agent, only reach the threshold value at temperature and atmospheric pressure value and just trigger interior suction structure 220 and breathe in, the interior suction structure 220 can not be triggered under the lower circumstances of energy storage module temperature but inside atmospheric pressure, realizes that temperature and atmospheric pressure dual threshold value limit, uses more accurately, has improved the utilization ratio of likepowder getter 223.

Through grouping the internal air suction ports 222 and setting solid-phase inert plugging agents and pressure sensitive films 225 with different melting points and pressure thresholds, the function of step-by-step air suction is realized, when the internal temperature and pressure of the energy storage module are gradually increased, small spaces in the internal partition pipes 221 are opened one by one, the powdery getter 223 flows out step by step to perform air suction operation, the generation speed of internal gas is effectively slowed down by the aid of a step response mechanism, the thermal runaway phenomenon of a battery is lightened, the service life of the energy storage module is remarkably prolonged, the utilization rate of the powdery getter 223 is improved, and the whole air suction device 200 can be used in multiple steps.

Further simulation verification is performed on the basis of simulation conditions in the second embodiment, life simulation is performed on the energy storage module in the second embodiment and the energy storage module in the second embodiment, wherein the number of charge and discharge cycles is set to be two thousand times, the discharge depth is controlled to be 60% -80%, the initial temperature of the working environment is set to be 25 ℃, the temperature of the working environment rises to be 5 ℃ after 500 charge and discharge cycles of the energy storage module each time, the maximum temperature of the working environment is set to be 40 ℃, the established battery model and the set use conditions are used for simulation experiments, in the simulation process, the change of key performance parameters such as capacity attenuation and internal resistance increase of a battery is recorded, and experimental data show that under the same use conditions, the life of the energy storage module in the second embodiment is prolonged by 20% -30% compared with the scheme of the second embodiment.

The technical scheme provided by the embodiment of the application at least has the following technical effects or advantages:

1. By arranging the pressure sensitive films 225 on the inner side and the outer side of the inner air suction port 222, the pressure sensitive films can respond in time before the internal pressure of the energy storage module reaches the safety limit, and when the pressure reaches the pressure threshold value of the sensitive films, the films can be broken to release the internal pressure, so that the risk of explosion or short circuit is reduced, and the safety of the energy storage module in the use process is obviously enhanced.

2. Through the design of the inner air suction port 222 with different melting points and pressure thresholds, the energy storage module can adapt to a wider working temperature and pressure range, in addition, the inner partition pipe 221 is divided into a plurality of small spaces by the partition plate 224, and each small space corresponds to one group of inner air suction port 222, so that the air suction efficiency and reliability are further improved.

3. By grouping the inner suction ports 222, the graded response mechanism effectively slows down the generation speed of the inner gas, and alleviates the thermal runaway phenomenon of the battery, thereby remarkably prolonging the service life of the energy storage module, improving the utilization rate of the powdery getter 223, and the whole getter device 200 can be used for multiple times and multiple stages.

4. By the same cooperation of the pressure sensitive film 225 and the solid-phase inert plugging agent, the internal air suction structure 220 can be triggered to suck air only when the temperature and the air pressure reach the threshold value, so that the use is more accurate and effective, and the utilization rate of the powdery air suction agent 223 is improved.

Embodiment four: in the above embodiment, when the humidity inside the housing 110 is high, the powder getter 223 at the inner air inlet 222 may be stuck, so that the inner air inlet 222 is blocked, or the powder getter 223 is mutually pressed and blocked, so that the powder getter 223 inside the inner separator 221 cannot flow out effectively, and the air suction effect is still further improved; the embodiment of the application is optimized to a certain extent on the basis of the embodiment.

As shown in fig. 12 and 13, the air suction device 200 further includes a plurality of carrying-out assemblies 230, and the carrying-out assemblies 230 are the same as the inner air suction openings 222 in number and in one-to-one correspondence; the carrying-out assembly 230 comprises an inner pull rope 231 and a falling ball 232, the falling ball 232 is positioned outside the inner partition pipe 221, one end of the inner pull rope 231 is fixedly connected with the falling ball 232, the other end of the inner pull rope 231 passes through the corresponding inner air suction port 222 to enter the corresponding small space and is fixed on the inner wall of the corresponding small space, and the inner pull rope 231 passes through the two pressure sensitive films 225 in the corresponding inner air suction port 222 in a sealing mode in the initial state.

Preferably, the inner pull rope 231 is made of nylon.

Further, as shown in fig. 14, the carrying-out assembly 230 further includes a plurality of carrying-out bodies 233, the inner pull rope 231 is spirally wound in the corresponding small space in the initial state, and one end of the inner pull rope 231 far from the falling ball 232 is fixed in the middle position of the inner wall of the top end in the small space; the two inner pull ropes 231 in the same small space are not interfered with each other (the positions of the inner pull ropes are opposite and staggered); a plurality of carrying-out bodies 233 are fixed on the inner pull rope 231, the carrying-out bodies 233 are ellipsoidal as a whole, the long axes of the carrying-out bodies 233 are overlapped with the inner pull rope 231, and the short axis diameter of the carrying-out bodies 233 is not larger than the opening radius of the inner air suction port 222; the number of the carrying-out bodies 233 on the same inner pull rope 231 is 5 to 10, and the volumes of the carrying-out bodies 233 are different from each other; after the corresponding inner air suction port 222 is in an opened state, the inner pull rope 231 is driven to extend out of the inner partition pipe 221 under the action of gravity of the falling ball 232, and the powdery getter 223 in the corresponding small space can flow out more smoothly under the driving of the inner pull rope 231, so that the gas absorption efficiency is improved.

Further simulation verification is performed on the basis of simulation conditions in the third embodiment, life simulation is performed on the energy storage module in the third embodiment and the energy storage module in the third embodiment, wherein the number of charge and discharge cycles is set to be two thousand times, the discharge depth is controlled to be 60% -80%, the initial temperature of the working environment is set to be 25 ℃, the temperature of the working environment rises to be 5 ℃ after 500 charge and discharge cycles of the energy storage module each time, the maximum temperature of the working environment is set to be 40 ℃, the established battery model and the set use conditions are used for simulation experiments, in the simulation process, the change of key performance parameters such as capacity attenuation and internal resistance increase of a battery is recorded, and experimental data show that under the same use conditions, the life of the energy storage module in the third embodiment is prolonged by 8% -10% compared with the scheme of the third embodiment.

The technical scheme provided by the embodiment of the application at least has the following technical effects or advantages:

1. Through setting up interior stay cord 231 and take out body 233, when interior induction port 222 opens the back, the gravity effect of drop ball 232 can drive interior stay cord 231 and stretch out interior separate tube 221, and the take out body 233 on the interior stay cord 231 can disturb and take out the likepowder getter 223 in the little space in the removal process, makes it flow out more smoothly and react with the harmful gas that probably produces, and likepowder getter 223 utilization ratio is higher to gas absorption efficiency has been improved.

2. Due to the presence of the carry-over assembly 230, the flow and distribution of the powdered getter 223 becomes more rapid and uniform, which means that the getter device 200 can respond more rapidly, absorbing harmful gases in time, reducing the risk of internal short circuits or thermal runaway, when the internal temperature and pressure of the energy storage module change; by increasing the gas absorption efficiency and response speed, the rate of decay in cell performance is further slowed down.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The power grid-based multi-energy complementary energy storage system is characterized by comprising an energy output module, an energy storage module, a conversion management module and an output module; the energy output module comprises a photovoltaic power generation unit, a wind power generation unit, a thermal power generation unit and a complementary unit; the photovoltaic power generation unit, the wind power generation unit and the thermal power generation unit are respectively connected with the input end of the complementary unit, and the output end of the complementary unit is connected with the input end of the energy storage module; the output end of the energy storage module is connected with the conversion management module; the conversion management module comprises a power conversion system and an energy management system, wherein the power conversion system converts electric energy from different sources into a form suitable for storage or integration into a power grid, and the energy management system monitors, controls and optimally schedules the multi-energy complementary system;

The intelligent sensing and decision making module is also included; the intelligent sensing and decision module dynamically adjusts and controls the working modes of each energy output unit according to the multiple information of real-time weather, energy demand and local real-time electricity price so as to realize the efficient utilization and optimal configuration of energy;

The photovoltaic power generation unit and the wind power generation unit receive real-time weather information including illumination intensity and wind speed through the intelligent sensing and decision module, and adjust the working state of the photovoltaic power generation unit and the wind power generation unit according to the information; the thermal power generation unit is used as a stable energy source to supply supplement when the photovoltaic power generation and the wind power generation cannot meet the requirements; the complementary unit can dynamically adjust the energy proportion received from each power generation unit according to the control signal of the intelligent sensing and decision module, and the energy is integrated and then is transmitted to the energy storage module for storage; the energy storage module flexibly stores and releases electric energy according to the real-time requirement of the power grid and the electricity price information;

And when the wind speed sensed by the intelligent sensing and decision making module is between 5 and 25m/s, controlling the wind power generation unit to operate and output energy.

2. The grid-based multi-energy complementary energy storage system of claim 1, wherein the energy storage module comprises a body (100) and a getter device (200), the body (100) comprising a housing (110), an upper cover (120), and an electrode assembly (130); the whole shell (110) is a hollow cuboid with an upper opening, and the upper cover (120) covers and seals the opening of the shell (110); an electrode assembly (130) is stored inside the case (110); the electrode assembly (130) is provided with a through cylindrical opening along the height direction, and a suction device (200) is arranged in the cylindrical opening.

3. The grid-based multi-energy complementary energy storage system of claim 2, wherein the getter device (200) comprises an outer getter structure (210) and an inner getter structure (220), the inner getter structure (220) being located inside the outer getter structure (210); the outer suction structure (210) comprises an outer separation tube (211), the whole outer separation tube (211) is a hollow round table with a large upper end and a small lower end, the lower end of the outer separation tube (211) is fixed at the center position of the inner wall of the bottom surface of the shell (110), and a gap exists between the outer wall of the outer separation tube (211) and the electrode assembly (130); a plurality of outer air inlets (212) are uniformly formed in the outer partition tube (211), and the outer air inlets (212) are used for communicating the inner space of the outer partition tube (211) with the outside of the outer partition tube (211); the number of the outer air inlets (212) is 8 to 15; the inside of the outer air suction port (212) is blocked by a solid-phase inert blocking agent, and the melting point of the solid-phase inert blocking agent in the inside of the outer air suction port (212) is 48-55 ℃; a plurality of annular getters (213) are fixed in the outer partition tube (211) along the height direction, and the annular getters (213) are sleeved outside the inner gettering structure (220).

4. The grid-based multi-energy complementary energy storage system according to claim 3, wherein the inner air suction structure (220) comprises an inner partition tube (221), the inner partition tube (221) is integrally circular tube-shaped, the inner partition tube (221) is fixed inside the outer partition tube (211), the top end of the inner partition tube (221) is fixedly connected with the inner wall of the top end of the outer partition tube (211), and the bottom end of the inner partition tube (221) is fixedly connected with the inner wall of the bottom end of the outer partition tube (211); an inner air suction port (222) is uniformly formed in the inner partition pipe (221), a solid-phase inert plugging agent is plugged in the inner air suction port (222), and the melting point of the solid-phase inert plugging agent in the inner air suction port (222) is 50-65 ℃; the number of the inner air inlets (222) is 10 to 20; the inner separator tube (221) is internally filled with a powdery getter (223); a blocking net is fixed in the outer air suction port (212), and the diameter of a mesh of the blocking net is smaller than the diameter of particles in the powdery getter (223) and is used for blocking the powdery getter (223); the diameter of the inner suction opening (222) is 5 to 8 times the diameter of the particles in the powdery getter (223).

5. The grid-based multi-energy complementary energy storage system according to claim 4, wherein the internal air inlets (222) are divided into a plurality of groups, and the number of the internal air inlets (222) in each group is two, and the two internal air inlets (222) in the same group are symmetrically arranged; the number of groups of the inner air inlets (222) is 5 to 10, and the inner air inlets (222) in each group are uniformly distributed along the axis of the inner partition pipe (221); a plurality of round partition plates (224) are horizontally fixed inside the inner partition tube (221), the inner partition tube (221) is divided into a plurality of small spaces by the plurality of partition plates (224), the number of the partition plates (224) is 1 less than the number of the groups of the inner air suction openings (222), the number of the small spaces inside the inner partition tube (221) is the same as the number of the groups of the inner air suction openings (222), one group of inner air suction openings (222) corresponds to each small space, and one group of inner air suction openings (222) are positioned at the bottom end positions inside the corresponding small spaces.

6. The grid-based multi-energy complementary energy storage system of claim 5, wherein the pressure sensitive membrane (225) is sealingly fixed to both the inside and outside of the inner suction opening (222), and the solid phase inert blocking agent in the inner suction opening (222) is located between the two pressure sensitive membranes (225); the melting point of the solid-phase inert plugging agent in the inner air suction opening (222) close to the upper cover (120) is larger than that of the solid-phase inert plugging agent in the inner air suction opening (222) far away from the upper cover (120), the pressure threshold value of the pressure sensitive film (225) in the inner air suction opening (222) close to the upper cover (120) is larger than that of the pressure sensitive film (225) in the inner air suction opening (222) far away from the upper cover (120), so that after the temperature in the shell (110) is increased and the air pressure value is increased, each small space in the inner partition tube (221) is gradually communicated with the external environment from bottom to top, and the powdery getter (223) in the small space flows out step by step.

7. The grid-based multi-energy complementary energy storage system of claim 6, wherein said air intake device (200) further comprises a plurality of carry-out assemblies (230), said carry-out assemblies (230) being the same number and one-to-one correspondence with said inner air intake openings (222); the take-out assembly (230) comprises an inner pull rope (231) and a falling ball (232), the falling ball (232) is positioned outside the inner partition pipe (221), one end of the inner pull rope (231) is fixedly connected with the falling ball (232), the other end of the inner pull rope (231) penetrates through the corresponding inner air suction port (222) to enter a corresponding small space and is fixed on the inner wall of the corresponding small space, and the inner pull rope (231) penetrates through two layers of pressure sensitive films (225) in the corresponding inner air suction port (222) in a sealing mode in an initial state.

8. The grid-based multi-energy complementary energy storage system of claim 7, wherein the carry-out assembly (230) further comprises a plurality of carry-out bodies (233), the inner pull rope (231) is spirally wound in a corresponding small space in an initial state, and one end of the inner pull rope (231) far away from the falling ball (232) is fixed at a position in the middle of the inner wall of the top end in the small space; the two inner pull ropes (231) in the same small space are not interfered with each other; a plurality of carrying-out bodies (233) are fixed on the inner pull rope (231), the carrying-out bodies (233) are integrally in an ellipsoid, the long axis of each carrying-out body (233) is overlapped with the inner pull rope (231), and the diameter of the short axis of each carrying-out body (233) is not larger than the opening radius of the inner air suction port (222); the number of the carrying-out bodies (233) on the same inner pull rope (231) is 5 to 10, and the volumes of the carrying-out bodies (233) are different.

9. The power grid-based multi-energy complementary energy storage method, matched with the power grid-based multi-energy complementary energy storage system as claimed in claim 1, comprising:

S1: ensuring that the energy output module, the energy storage module, the conversion management module, the output module and the intelligent perception and decision module are correctly connected and in a standby state;

S2: the intelligent sensing and decision-making module starts to work and collects weather information, energy demand data of the power grid and electricity price information in real time; these data are continuously monitored and updated to ensure that the system always makes decisions based on the most up-to-date information;

S3: according to the collected illumination intensity data, the intelligent sensing and decision module judges the running state of the photovoltaic power generation unit; when the illumination intensity is more than 600W/m, controlling the photovoltaic power generation unit to operate at full power; meanwhile, according to the wind speed data, when the wind speed is between 5m/s and 25m/s, the wind power generation unit is controlled to start and operate; the thermal power generation unit is used as a backup energy source, and when the photovoltaic power generation and the wind power generation cannot meet the power grid demand, the output power is increased according to the control of the energy management system;

S4: the complementary unit receives electric energy from the photovoltaic power generation unit, the wind power generation unit and the thermal power generation unit and dynamically adjusts the proportion of energy received from each power generation unit according to the control signals of the intelligent sensing and decision module; the complementary unit integrates the electric energy from different sources and then transmits the integrated electric energy to the energy storage module for storage or directly integrates the integrated electric energy into a power grid through the conversion management module;

S5: the energy storage module decides whether to store electric energy or release electric energy according to the real-time requirement of the power grid and the electricity price information; in a period of low electricity price and low energy demand, the surplus electric energy is stored; during periods of high electricity prices or large energy demands, the stored electrical energy is released to meet grid demands;

S6: the energy management system continuously monitors the running state of the whole multi-energy complementary energy storage system, including the output power of each power generation unit, the charge and discharge states of the energy storage modules and the real-time requirements of the power grid; according to the monitoring data and the electricity price information, the energy management system performs optimal scheduling, and adjusts the working mode of each power generation unit and the charging and discharging strategy of the energy storage module so as to realize efficient utilization of energy and economic operation of the system.