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CN119154355A - A dual energy storage method and system for solar energy electricity storage and heat storage - Google Patents

A dual energy storage method and system for solar energy electricity storage and heat storage Download PDF

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Publication number
CN119154355A
CN119154355A CN202411629189.0A CN202411629189A CN119154355A CN 119154355 A CN119154355 A CN 119154355A CN 202411629189 A CN202411629189 A CN 202411629189A CN 119154355 A CN119154355 A CN 119154355A
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China
Prior art keywords
heat
battery
heat preservation
module
storage
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Pending
Application number
CN202411629189.0A
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Chinese (zh)
Inventor
张世军
于增强
刘永峰
张锁
付纬
黄宝凤
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Xiangjiang Technology Group Co ltd
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Xiangjiang Technology Group Co ltd
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Priority to CN202411629189.0A priority Critical patent/CN119154355A/en
Publication of CN119154355A publication Critical patent/CN119154355A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S50/00—Arrangements for controlling solar heat collectors
    • F24S50/40—Arrangements for controlling solar heat collectors responsive to temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S60/00—Arrangements for storing heat collected by solar heat collectors
    • F24S60/10—Arrangements for storing heat collected by solar heat collectors using latent heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • F24S80/60—Thermal insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/635—Control systems based on ambient temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
    • H02S10/20—Systems characterised by their energy storage means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/40—Thermal components
    • H02S40/44—Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Electromagnetism (AREA)
  • Secondary Cells (AREA)

Abstract

The application discloses a double energy storage method and a double energy storage system for solar energy electricity storage and heat storage, which relate to the technical field of solar photovoltaic and lithium electricity energy storage collaborative power supply, and can reasonably control the charging and heating of a battery module and control the heat preservation or heat dissipation operation mode of the battery module by comprehensively judging the temperature of a built-in temperature sensor of the lithium battery module, the output voltage of a photovoltaic module and other relevant conditions, so that the double energy storage effects of charging and heating are achieved during photovoltaic power generation peak, the problem that the power supply time is shortened due to the fact that the lithium battery module cannot be used or precious electricity storage is consumed for heating in the solar power supply system power generation peak and night low-temperature environments in the prior art is solved, and the beneficial effects of fully utilizing the photovoltaic power generation energy of the power generation peak and utilizing green energy to the maximum are achieved.

Description

Dual-energy storage method and system for solar energy electricity storage and heat storage
Technical Field
The application relates to the technical field of solar photovoltaic and lithium battery energy storage and power supply, in particular to a solar energy electricity storage and heat storage double-energy storage method and system.
Background
At present, a plurality of communication base stations built in remote mountain areas have no mains supply condition, and the continuous power supply problem of the communication base stations can be solved by adopting a solar energy and lithium electricity energy storage cooperative power supply mode. Because of the timeliness of solar energy, the energy storage battery needs to be charged and discharged every day to ensure the continuous operation of the base station, so the lithium battery module is the first choice of the base station and has the service life of more than 3 years. However, the lithium battery is usually required to be normally operated at a temperature above 0 ℃ in the application process, and the discharge capacity is reduced or even the lithium precipitation phenomenon is generated below the temperature, so that the battery is irreversibly damaged. The common solution is to build a heating device in the lithium battery module and heat the battery module to above 0 ℃ in a low-temperature environment so as to ensure the normal discharge use of the battery module. However, the low-temperature environment is usually under the condition of no illumination at night, precious energy storage is wasted by heating the battery, and the normal power supply time is greatly shortened. The scheme also adopts an immersed liquid cooling mode, an energy storage battery is placed in a heat-preserving liquid cooling sleeve, the solar heating liquid cooling sleeve is used for heating and preserving heat for the battery, and heat conduction liquid is led to a cooling fin for heat dissipation in a high-temperature environment by a circulating pump. In some existing schemes, when the temperature of the battery module is detected to be too low, the battery module is heated, for example, patent document with the authorized publication number of CN215266459U discloses a scheme disclosed by a battery pack and a photovoltaic tracking bracket, the external environment temperature of the lithium battery pack is monitored in real time, when the protection board monitors that the external environment temperature of the lithium battery pack is lower than a set charge-discharge allowable temperature value, an internal heating control circuit starts a heating film to start heating, and the scheme is used for discharging and preserving heat under the condition that the battery temperature is already low and the charge-discharge performance is reduced, so that the service life of the battery is influenced, and if the battery is loaded at the moment, the heating module cannot be guaranteed to obtain the heating power, and solar energy is wasted.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides a solar electricity storage and heat storage double-energy storage method and system, which are used for solving the problems that in the prior art, electricity rejection occurs at a solar electricity generation peak under the condition of no commercial power, a low-temperature environment battery is required to be additionally consumed to heat the battery to maintain continuous power supply to equipment, the power supply time is shortened, or the battery is damaged due to low-temperature power supply and the like.
In order to achieve the above purpose, the application is realized by the following technical scheme:
a solar energy electricity and heat storage double energy storage method comprises the following steps:
The electricity storage is started by adopting the following steps:
When the line voltage output by the photovoltaic module is larger than the charging starting voltage of the battery module, starting the charging function of the battery module;
the heat storage is started by adopting the following steps:
S11, recording a temperature change curve of a built-in temperature sensor of the battery module for the last 24 hours, and taking the minimum value of the temperature change curve as t 1;
s12, calculating a heating temperature target set value T 0,t0=T-t1 of the battery electric heating module according to a calculation frequency, wherein T is a heating temperature constant, the heating temperature constant is 35 ℃ plus or minus 3 ℃, and the calculation frequency is between 0.6 times/hour and 12 times/hour;
S13, comparing the current temperature of the battery module with a heating temperature target set value t 0, and starting a battery electric heating module when t 0 is greater than the current temperature of the battery module and the line voltage output by the photovoltaic module is greater than the charging rated voltage of the battery module;
The heat preservation and heat dissipation modes of the heat preservation sleeve of the battery module are switched by adopting the following steps:
s21, determining the working mode of the heat preservation sleeve of the battery module according to the running condition of the battery electric heating module within the last 24 hours, wherein the heat preservation sleeve is operated in a heat preservation mode by controlling the opening and closing mechanism to close the heat preservation sleeve cover if the battery electric heating module is started, and is operated in a heat dissipation mode by controlling the opening and closing mechanism to open the heat preservation sleeve cover if the battery electric heating module is not started.
Preferably, the heating temperature constant takes a value of 35 ℃.
Preferably, the calculated frequency is used once per hour.
Based on the same conception, the application also discloses a solar energy electricity storage and heat storage double-energy storage system, which comprises a photovoltaic module, a voltage conversion module and a battery module, wherein the photovoltaic module charges the battery module through the voltage conversion module, the battery module comprises an inner shell, a battery cell group, a battery management system and a battery electric heating module, the battery management system acquires a charge and discharge state of a battery, battery electric quantity and line voltage output by the photovoltaic module, the solar energy double-energy storage system further comprises a heating control device, an ambient temperature acquisition device, a heat preservation sleeve cover oppositely arranged and an opening and closing mechanism, the heat preservation sleeve is sleeved outside the battery module and forms a space cavity between the heat preservation sleeve and the heat preservation sleeve cover, the heat preservation sleeve cover is respectively arranged at an opposite opening of the heat preservation sleeve and is controlled by the opening and closing mechanism, the heat preservation sleeve cover and the heat preservation sleeve are closed or opened by the opening mechanism through the solar energy double-energy storage method, and the heating control device starts the battery electric heating module through the solar energy double-energy storage method.
Preferably, the opening and closing mechanism uses an electric automatic control opening and closing mechanism.
Preferably, the electric automatic control opening and closing mechanism comprises a motor, a brace, a pull rod, a door plate and a door plate shaft fixing block, wherein the motor is fixedly arranged at the center of the inner side of the thermal insulation sleeve cover, the center of the brace is fixed on a motor shaft and rotates in a plane parallel to the thermal insulation sleeve cover around the motor, the door plate is fixed in the door plate shaft fixing block through a door plate shaft at the edge of the door plate, the door plate rotates around the door plate shaft, the door plate shaft fixing block is fixed at the position corresponding to the edge of the thermal insulation sleeve cover and the inner wall of the thermal insulation sleeve, one end of the pull rod is fixed at the far end of the brace, the other end of the pull rod is fixed at the far end of the door plate, and the motor drives the door plate to seal or open the thermal insulation sleeve cover and the thermal insulation sleeve when rotating.
Preferably, the thermal insulation sleeve comprises an inner thermal insulation layer, and the phase change material is filled in the thermal insulation layer.
Compared with the prior art, the intelligent solar energy storage and heat storage system has the beneficial effects that the heating module of the battery module is comprehensively judged and controlled to heat and store heat for the battery by using the control system according to the conditions of the current environment temperature, the night temperature before the current time, the current capacity of the battery and the like, so that a double energy storage mode of electricity storage and heat storage is formed, the heat preservation sleeve of the battery module is used for automatically switching the heat preservation and heat dissipation modes by adopting an intelligent control method, heat storage is realized by fully utilizing the 'abandoned electricity' of a power generation peak, the green energy is utilized to the maximum extent, and the double energy storage of the electricity storage and the heat storage of the photovoltaic system in the power generation peak is realized.
Drawings
FIG. 1 is a schematic diagram of a three-dimensional connection of an embodiment of a dual energy storage system for solar energy storage and heat storage according to the present application;
FIG. 2 is a schematic side view of the inside of an opening and closing mechanism of an embodiment of a thermal insulation sleeve according to the present application in a ventilated state;
FIG. 3 is a schematic side view of the inside of an insulating sleeve according to an embodiment of the present application with the opening and closing mechanism in a sealed state;
FIG. 4 is a schematic side view of the interior of an embodiment of the insulating sleeve of the present application with the opening and closing mechanism in a process state;
the solar energy power generation device comprises a 1-photovoltaic module, a 2-voltage conversion module, a 3-heat insulation sleeve, a 4-battery module, a 5-hood, a 6-baffle, a 71-motor, a 72-brace, a 73-pull rod, a 74-door plate, a 741-door plate shaft and a 75-door plate shaft fixing block.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments.
The embodiment provides a technical scheme that the solar electricity and heat storage double-energy storage method is disclosed in the scheme,
The electricity storage is started by adopting the following steps:
When the line voltage output by the photovoltaic module 1 is larger than the charging starting voltage of the battery module 4, the charging function of the battery module is started, and the generated power of the photovoltaic module 1 is larger than the equipment load power but is insufficient for fully charging the battery module 4;
the heat storage is started by adopting the following steps:
S11, recording a temperature change curve of a built-in temperature sensor of the battery module 4 for the last 24 hours, wherein the curve covers the process of heating and cooling the battery module, and takes the minimum value of the curve as t 1 and the maximum value of the curve as t 2, wherein t 1 is the lowest temperature of the battery module 4 after full heat dissipation at night, usually the temperature of the battery module 4 in the early morning, and t 2 is the highest temperature obtained by heating or natural heating in the daytime, usually the temperature of the battery module 4 in the afternoon;
S12 confirms a heating temperature target value T 0 of the lithium battery module 4, and because the normal working temperature range of the lithium battery module 4 is 0-40 ℃, and the higher the temperature is, the stronger the discharge capability is, the temperature curve in the heat release process is basically consistent, therefore, the heating temperature target set value T 0 of the battery electric heating module can be calculated according to a calculation frequency, and the calculation formula T 0=T-t1 is used for calculating T 0, wherein T is a heating temperature constant, the heating temperature constant takes a value range of 35 ℃ +/-3 ℃, and the calculation frequency takes a value range of 0.6 times/hour to 12 times/hour, and in the embodiment, the heating temperature constant takes a value of 35 ℃, the value is a temperature central line of the temperature upper limit in summer in most areas, and the calculation frequency is suitable, and is used once per hour.
S13, comparing the current temperature of the battery module with a target set value t 0 of the heating temperature, when t 0 is larger than the current temperature of the battery module and the line voltage output by the photovoltaic module 1 is larger than the rated charging voltage of the battery module 4, starting the battery electric heating module, wherein the generating capacity of the photovoltaic module 1 is higher than the power requirements of actual equipment electricity utilization and battery charging, redundant electric energy is wasted as waste in a traditional system in the prior art, heat energy converted into the battery module is utilized and stored in the system, and if the conditions are not met, the battery electric heating module is not started, namely the redundant generating capacity of the photovoltaic module is used in the heat storage process. Under the sunlight-sufficient scene in the daytime, the solar energy is sufficient, the electric power is sufficient, the battery module 4 is charged according to the design capacity, the energy consumption of equipment loads is insufficient to consume all the power generation capacity, the phenomenon of power discarding often occurs, and the partial electric power can be just used for heating the battery body by using the battery electric heating module;
The heat preservation and heat dissipation steps are adopted:
S21, determining the working mode of the heat preservation sleeve 3 of the battery module 4 according to the running condition of the battery electric heating module within the last 24 hours, wherein the heat preservation sleeve 3 runs in the heat preservation mode by controlling the opening and closing mechanism to close the heat preservation sleeve cover if the battery electric heating module is started, and the heat preservation sleeve 3 runs in the heat dissipation mode by controlling the opening and closing mechanism to open the heat preservation sleeve cover if the battery electric heating module is not started.
Based on the same conception, the application also discloses a solar energy electricity and heat storage double-energy storage system, which comprises a photovoltaic module 1, a voltage conversion module 2, a heating control device, an environment acquisition device, a heat preservation sleeve 3, a battery module 4, a heat preservation sleeve cover arranged oppositely and an opening and closing mechanism, wherein the battery module 4, the voltage conversion module 2 and the like can be directly or indirectly vertically arranged on a holding pole, the photovoltaic module 1 charges the battery module 4 through the voltage conversion module 2, the voltage conversion module 2 can be a photovoltaic controller, the battery module 4 comprises a battery management system and a battery electric heating module, the battery management system acquires the charge and discharge state of a battery, the battery electric quantity and the line voltage output by the photovoltaic module 1, the battery electric heating module uses a heating plate or a heating film formed by heating resistance wires, or a heating module formed by an electric heating mode of a PTC heater, a semiconductor heater and the like, and the battery electric heating module is arranged on one side with the largest area of the whole battery module to heat the battery module when needed; the heat preservation sleeve 3 is sleeved outside the battery module 4, a space cavity is arranged between the heat preservation sleeve 3 and the outer shell of the battery module 4 to form a convection channel, the heat preservation sleeve covers are respectively arranged at opposite openings of the heat preservation sleeve 3 and controlled by an opening and closing mechanism, the heat preservation sleeve covers and the heat preservation sleeve 3 are closed or opened by the solar energy double-energy storage method, the heating control device starts a battery electric heating module by the solar energy electricity storage and heat storage double-energy storage method, the heating control device can be an independent device, comprises an external memory, an operation internal memory and a processor of a computer program, can also be integrated into the voltage conversion module 2 or a battery management system of the battery module 4, therefore, the intelligent control function of the solar electricity storage and heat storage double-energy storage method can be realized in the lithium battery, external equipment and sensor support are not needed, each battery pack is self-made into a system, communication and assistance are not needed, and extremely simple control is achieved.
In this embodiment, the insulation cover 3 includes shell and inboard heat preservation, and an opposite side at shell top exceeds the heat preservation, and the shell bottom four sides all are less than the heat preservation, the insulation cover lid includes the hood 5 outside the insulation cover 3 top and the baffle 6 in the insulation cover bottom, hood 5 has the cap peak lid outside the insulation cover 3, baffle 6 is located the shell but outside the heat preservation, baffle 6 hood 5 and baffle 6 are in a set of opposite side and the direct close connection of insulation cover 3, and another set of opposite side leaves open and supplies door plant 74 to seal or open, for the reliability and the intelligent controllability of opening and shutting, this embodiment open and shut mechanism uses electric automatic control open and shut mechanism, electric automatic control open and shut mechanism includes motor 71, brace 72, pull rod 73, door plant 74, door plant axle fixed block 75, motor 71 fixed mounting is in hood 5 and baffle 6 inboard center, the brace center is fixed on the motor 71 epaxial and is being parallel to the motor in the plane rotation of hood 5 and baffle 6, door plant 74 is fixed at door plant 74 and the inner wall of door plant axis 741 through a set of rotation of door plant 71, door plant 74 is fixed at door plant 74, the door plant 74 is fixed at the inner wall 741 fixed at the opposite side of door plant 75, the door plant end of door plant 74 is fixed to the inner wall of door plant 71, and the door plant end of the door plant is fixed at the inner wall of door plant 74. In this embodiment, the motor 71 drives the pull rod 72 and the pull rod 73 to enable the door 74 to be at a sealing position, i.e. a sealing position of the thermal insulation cover and the thermal insulation cover 3, and a ventilation position, i.e. a process position of opening and middle of the thermal insulation cover and the thermal insulation cover 3, as shown in the drawings.
The opening and closing mechanism can use an electric automatic control opening and closing mechanism, and can also use a natural control mode without control, such as a thermal bimetallic strip bracket, which has low cost, no power consumption, unreliability and no manual control. Besides the control mode of the motor pull rod air door disclosed by the embodiment, other control schemes such as bistable electromagnet, electric push rod and the like can also be used for the electric automatic control opening and closing mechanism.
When the battery electric heating module is started in the last 24 hours, the hood 5 and the baffle 6 are closed to form a closed cavity, and the effective heat preservation of the battery module 4 can be realized by utilizing the heat preservation layer of the heat preservation sleeve. The phase change material is filled in the inner side of the heat preservation layer, so that more heat energy can be stored, and heat can be released to the inside to achieve a heating effect during temperature reduction and phase change. The phase change material can store more heat energy, but the heat conductivity of the phase change material is larger, and the heat insulation layer can be realized by adopting a plurality of layers of materials, for example, the inner side adopts the phase change material, and the outer side adopts the conventional materials such as polystyrene foam or heat insulation cotton. According to the embodiment, under the condition of the night environment temperature reduction, the night environment temperature is reduced, the battery module 4 utilizes the heat stored by the battery module and the good heat preservation performance of the heat preservation sleeve 3, and the battery module 4 can be kept above 0 ℃ at the whole night, so that the normal discharge of the battery and the cycle life of the battery can be ensured.
When the battery electric heating module is not started in the last 24 hours, the hood 5 and the baffle 6 are opened, the cavity is communicated up and down to form a chimney effect, heat of the battery module 4 body can be taken away by flowing air, and meanwhile, the existence of the shell of the heat preservation sleeve 3 also shields solar radiation, which is equivalent to a sun-proof cover, so that the battery module 4 is further prevented from being overtemperature. When the upper opening and the lower opening of the heat preservation sleeve are not in the vertical direction, a fan can be added in the heat preservation sleeve to help heat dissipation.
In the description of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above description is only a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art should be able to substitute or change the technical solution and the inventive concept according to the present application within the scope of the present application.

Claims (7)

1. A solar energy electricity and heat storage double energy storage method is characterized in that:
The electricity storage is started by adopting the following steps:
when the line voltage output by the photovoltaic module (1) is larger than the charging starting voltage of the battery module (4), starting the charging function of the battery module;
the heat storage is started by adopting the following steps:
S11, recording a temperature change curve of a built-in temperature sensor of the battery module (4) for the last 24 hours, and taking the minimum value of the temperature change curve as t 1;
s12, calculating a heating temperature target set value T 0,t0=T-t1 of the battery electric heating module according to a calculation frequency, wherein T is a heating temperature constant, the heating temperature constant is 35 ℃ plus or minus 3 ℃, and the calculation frequency is between 0.6 times/hour and 12 times/hour;
S13, comparing the current temperature of the battery module (4) with a heating temperature target set value t 0, and starting a battery electric heating module when t 0 is greater than the current temperature of the battery module (4) and the line voltage output by the photovoltaic module (1) is greater than the charging rated voltage of the battery module (4);
The heat preservation and heat dissipation modes of the heat preservation sleeve (3) of the battery module (4) are switched by adopting the following steps:
S21, determining the working mode of the heat preservation sleeve (3) of the battery module (4) according to the running condition of the battery electric heating module within the last 24 hours, wherein if the battery electric heating module is started, the heat preservation sleeve (3) runs in the heat preservation mode by controlling the opening and closing mechanism to close the heat preservation sleeve cover, and if the battery electric heating module is not started, the heat preservation sleeve (3) runs in the heat dissipation mode by controlling the opening and closing mechanism to open the heat preservation sleeve cover.
2. The method for storing and storing energy by solar energy according to claim 1, wherein the heating temperature constant is 35 ℃.
3. The method of storing energy and heat using solar energy according to claim 1, wherein the calculated frequency is used once per hour.
4. The solar energy electricity storage and heat storage double-energy storage system comprises a photovoltaic assembly (1), a voltage conversion module (2) and a battery module (4), wherein the photovoltaic assembly (1) supplies power to electric equipment through the voltage conversion module (2) and charges the battery module (4), the battery module (4) comprises an inner shell, a battery cell group, a battery management system and a battery electric heating module, the battery management system obtains the charge and discharge state of a battery, the battery electric quantity and the line voltage output by the photovoltaic assembly (1), and the solar energy electricity storage and heat storage double-energy storage system is characterized by further comprising a heating control device, an environment temperature acquisition device, a heat preservation sleeve (3), a heat preservation sleeve cover oppositely arranged, and an opening and closing mechanism, wherein the heat preservation sleeve (3) is sleeved outside the battery module (4) to form a space cavity therebetween, and is respectively arranged at an opposite opening of the heat preservation sleeve (3) and controlled by the opening and closing mechanism, and the heat preservation sleeve (3) are closed or opened by the double-energy storage method of solar energy storage and heat storage according to any one of claims 1 to 3, and the heat storage double-energy storage method of the solar energy storage and the heat storage device is used for heating the solar energy storage and the solar energy storage device.
5. The solar energy storage and thermal storage dual energy storage system of claim 4 wherein said opening and closing mechanism is an electrically automated control opening and closing mechanism.
6. The solar energy electricity and heat storage double-energy storage system according to claim 5, wherein the automatic electric control opening and closing mechanism comprises a motor (71), a brace (72), a pull rod (73), a door plate (74) and a door plate shaft fixing block (75), the motor (71) is fixedly arranged at the center of the inner side of the heat preservation cover, the brace center is fixed on the motor (71) shaft and rotates around the motor in a plane parallel to the heat preservation cover, the door plate (74) is fixed in the door plate shaft fixing block (75) through a door plate shaft (741) at the edge of the door plate (74), the door plate (74) rotates around the door plate shaft (741), the door plate shaft fixing block (75) is fixed at a position corresponding to the inner wall of the heat preservation cover, one end of the pull rod (73) is fixed at the far shaft end of the brace (72), and the other end of the pull rod (73) is fixed at the far door plate shaft (741) end of the door plate (74), and the door plate (74) is driven to seal or open the heat preservation cover (3) when the motor (71) rotates.
7. The solar electricity and heat storage double energy storage system according to claim 4, wherein the heat insulation sleeve (3) comprises an inner heat insulation layer, and the heat insulation layer is internally filled with phase change materials.
CN202411629189.0A 2024-11-15 2024-11-15 A dual energy storage method and system for solar energy electricity storage and heat storage Pending CN119154355A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201207578Y (en) * 2008-04-18 2009-03-11 耿华 Wind light complementary type mobile electric power
CN114696440A (en) * 2020-12-30 2022-07-01 青岛双益信息科技有限公司 Control method of solar power supply energy storage battery constant temperature device
CN217984543U (en) * 2022-08-04 2022-12-06 湖北合迅电气有限公司 Capacitance compensation cabinet with automatic ventilation adjusting device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201207578Y (en) * 2008-04-18 2009-03-11 耿华 Wind light complementary type mobile electric power
CN114696440A (en) * 2020-12-30 2022-07-01 青岛双益信息科技有限公司 Control method of solar power supply energy storage battery constant temperature device
CN217984543U (en) * 2022-08-04 2022-12-06 湖北合迅电气有限公司 Capacitance compensation cabinet with automatic ventilation adjusting device

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