Light storage and charging integrated electric energy control system based on industrial park

Abstract

The utility model provides a light storage and charging integrated electric energy control system based on an industrial park, which is characterized in that a first-stage photovoltaic assembly is arranged on the roof of a building of the industrial park, a second-stage photovoltaic assembly is arranged on the top of a shed of a vehicle charging device, and a third-stage photovoltaic assembly is arranged on the top of an external building of an energy storage unit; the multi-stage photovoltaic assemblies are connected with the alternating current bus through the photovoltaic inverters, the vehicle charging device is connected with the alternating current bus, the energy storage unit comprises a plurality of fixed batteries and battery replacement batteries, the energy storage unit is connected with the alternating current bus through the energy storage converter, and the control cabinet is electrically connected with the photovoltaic assemblies, the energy storage unit and the vehicle charging device. The system is used for remotely controlling the operation modes of the photovoltaic module, the energy storage unit and the vehicle charging device and monitoring the operation states of the photovoltaic module, the energy storage unit and the vehicle charging device. According to the utility model, the utilization efficiency of solar energy resources can be effectively improved, and full consumption of clean electric energy can be realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to new energy power electronic control technical field especially relates to a kind of light storage and charging integrated electric energy control system based on industrial park. BACKGROUND

[0002] New energy carrier application and charging infrastructure construction are in the vigorous development stage, as the new charging facilities with new energy consumption, load fluctuation suppression and delay transmission line expansion function, namely the application of light storage and charging integrated electric energy system is more widely used.

[0003] In prior art, conventional light storage and charging integrated electric energy system is usually only composed of photovoltaic assembly, energy storage unit and charging pile, in the process of light storage and charging integrated electric energy system building, photovoltaic assembly is only laid on the top of carport, and the space utilization rate is low, the clean energy supply capacity is weak, and the energy storage unit is only used for charging pile direct energy supply, and the electric load is single, cannot realize the full consumption of clean energy, in addition, the control system function of photovoltaic assembly, energy storage unit and charging pile is single, cannot effectively guarantee the use safety and resource rationality of light storage and charging integrated electric energy system. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of light storage and charging integrated electric energy control system based on industrial park to solve the technical problems of weak power supply capacity, single electric load, poor safety and large power supply voltage fluctuation of conventional light storage and charging integrated electric energy system in prior art.

[0005] To solve the above problems, the technical scheme of the utility model is as follows: a kind of light storage and charging integrated electric energy control system based on industrial park, comprising: photovoltaic assembly, vehicle charging device, energy storage unit, control cabinet and AC bus;

[0006] The photovoltaic assembly includes a first photovoltaic assembly, a second photovoltaic assembly and a third photovoltaic assembly, the first photovoltaic assembly is arranged on the roof of the building in the industrial park, the second photovoltaic assembly is arranged on the top of the carport of the vehicle charging device, and the third photovoltaic assembly is arranged on the top of the external building of the energy storage unit, the first photovoltaic assembly, the second photovoltaic assembly and the third photovoltaic assembly are connected to the AC bus through photovoltaic inverters respectively.

[0007] The vehicle charging device is connected to the AC bus.

[0008] The energy storage unit includes a plurality of fixed batteries and replaceable batteries, the energy storage unit is connected with the AC bus through an energy storage converter, and the energy storage unit is configured to charge the fixed batteries and the replaceable batteries by the electric energy generated by the photovoltaic assembly; the fixed batteries charged completely are used to supply energy for the vehicle charging device; and the replaceable batteries charged completely are used to supply energy for the replaceable vehicle.

[0009] The control cabinet is electrically connected with the photovoltaic assembly, the energy storage unit and the vehicle charging device respectively, and is used for remotely controlling the operation mode of the photovoltaic assembly, the energy storage unit and the vehicle charging device, and monitoring the operation state of the photovoltaic assembly, the energy storage unit and the vehicle charging device.

[0010] Preferably, the first photovoltaic assembly, the second photovoltaic assembly and the third photovoltaic assembly are respectively provided with a plurality of monocrystalline solar cell panels, a plurality of the monocrystalline solar cell panels are connected in series and / or in parallel in the first photovoltaic assembly, the second photovoltaic assembly and the third photovoltaic assembly, and the inclination angle of the monocrystalline solar cell panel and the horizontal reference plane is limited to 20°-50°.

[0011] Preferably, the energy storage unit is externally provided with a movable container body, the fixed batteries and the replaceable batteries are stored in the battery racks in the movable container body in a regionally manner, the movable container body is provided with a mounting bracket at the bottom and a plurality of ventilation holes in the side wall.

[0012] Preferably, the movable container body is internally provided with an active cooling device, the active cooling device is electrically connected with the control cabinet, the active cooling device includes a liquid cooling plate, a liquid cooling pipeline, a cooling pump and a liquid cooling unit, the liquid cooling unit connects the liquid cooling plate and the cooling pump through the liquid cooling pipeline to establish a cooling liquid circulation loop, and the liquid cooling plate is laid in the battery rack and contacts the surfaces of the fixed batteries and the replaceable batteries to realize heat exchange.

[0013] Preferably, the movable container body is internally provided with a fire-fighting device, the fire-fighting device is electrically connected with the control cabinet, the fire-fighting device includes a temperature sensor, a smoke sensor, a flammable gas sensor and a buzzer, when the fire-fighting device sends an alarm, the control cabinet enables the energy storage converter to cut off the electric energy transmission between the energy storage unit and the AC bus.

[0014] Preferably, the energy storage unit is equipped with a battery management system (BMS), which includes a battery management unit (BMU), a battery cluster control unit (BCU), a battery array control unit (BAU), a high-voltage disconnect box (BDU), a high-voltage control board, an analog front-end (AFE), a microcontroller (MCU), a fuel gauge, a temperature protection and detection component, a communication module, and a battery active balancing module.

[0015] Preferably, the control cabinet is located in the electrical room, and the control cabinet includes a manual operation mode and an automatic operation mode.

[0016] Preferably, a photovoltaic-storage-charging integrated power control system based on an industrial park is provided with a central control screen, which is electrically connected to the control cabinet. The central control screen is used to realize the data visualization function of total system charging amount, total discharge amount, daily charging amount, daily discharge amount, photovoltaic power curve, charging and discharging power, SOH, SOC, PCS operating status, operating status of the active cooling device, operating status of the fire protection device, and usage status of the vehicle charging device.

[0017] Preferably, the AC bus is also connected to the mains power supply and is configured such that during off-peak hours, the control cabinet can control the AC bus to simultaneously use the mains power and the photovoltaic modules to charge the energy storage unit and supply power to the vehicle charging device; during peak hours, the control cabinet can control the AC bus to use only the photovoltaic modules to charge the energy storage unit and supply power to the vehicle charging device.

[0018] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art:

[0019] This invention provides an integrated photovoltaic, energy storage, and charging power control system for industrial parks. Multi-level photovoltaic modules are distributed and installed on the rooftops of industrial park buildings, the rooftops of vehicle charging sheds, and the exterior rooftops of the energy storage unit. This effectively improves the utilization rate of space and solar energy resources, thereby increasing the system's clean energy supply capacity. In this invention, the energy storage unit includes fixed batteries and swappable batteries. The fixed batteries directly power the vehicle charging devices, while the swappable batteries power battery-swapping vehicles, increasing the total capacity and load utilization of the energy storage unit and achieving full utilization of clean energy. Simultaneously, this invention includes a control cabinet electrically connected to the photovoltaic modules, energy storage unit, and vehicle charging devices, enabling integrated control and monitoring functions and optimizing system control efficiency. Furthermore, the energy storage unit is equipped with an active cooling device and a fire-fighting device to effectively ensure the safety of the energy storage unit during use. Attached Figure Description

[0020] Fig. 1The utility model provides a kind of structure schematic diagram of light storage and filling integrated electric energy control system based on industrial park;

[0021] Fig. 2 The utility model provides a kind of electric power system diagram of light storage and filling integrated electric energy control system based on industrial park.

[0022] Mark explanation:1:industrial park building;2:photovoltaic module;3:mounting bracket;4:energy storage unit;5:vehicle charging device;6:wall;7:electrical room;8:control cabinet;9:carport;10:photovoltaic inverter;11:AC bus. DETAILED DESCRIPTION

[0023] The light storage and filling integrated electric energy control system based on industrial park provided by the utility model is further described in detail in connection with the drawings and specific embodiments.According to the following description and claims, the advantages and features of the utility model will be more apparent.

[0024] Reference Figs. 1-2 The embodiment provides a kind of light storage and filling integrated electric energy control system based on industrial park, for converting solar energy into electric energy, for the high-efficiency energy supply of new energy carrier in industrial park.

[0025] Specifically, the light storage and filling integrated electric energy control system based on industrial park provided by the embodiment, main body includes photovoltaic module 2, vehicle charging device 5, energy storage unit 4, control cabinet 8 and AC bus 11.Photovoltaic module 2 includes primary photovoltaic module, secondary photovoltaic module and tertiary photovoltaic module, primary photovoltaic module is arranged on the roof of industrial park building 1, secondary photovoltaic module is arranged on the top of carport 9 of vehicle charging device 5, tertiary photovoltaic module is arranged on the top of external building of energy storage unit 4, primary photovoltaic module, secondary photovoltaic module and tertiary photovoltaic module are connected by photovoltaic inverter 10 and AC bus 11 respectively, and photovoltaic module 2 can convert solar energy into electric energy based on photoelectric effect, and electric energy is transmitted to AC bus 11.In the embodiment, multiple photovoltaic modules 2 are provided, which can effectively utilize existing space, increase clean power generation and supply capacity, and reduce roof direct sunlight, reduce building 1 internal temperature, reduce air conditioning use, thereby reducing urban heat island effect.

[0026] Vehicle charging device 5 is connected with AC bus 11, and vehicle charging device 5 includes charging pile or other device that can supply power to new energy carrier in real time, and battery cabinet that can provide battery replacement battery, wherein the charging pile can be flexibly hung on the wall 6 near the parking space.

[0027] The energy storage unit 4 includes fixed batteries and battery replacement batteries. The energy storage unit 4 is connected with the AC bus 11 through an energy storage converter. During the operation of the photovoltaic storage and charging integrated power control system, the electric energy generated by the photovoltaic module 2 is transmitted to the energy storage converter through the AC bus 11. The energy storage converter first converts the alternating current into direct current, and then charges the fixed batteries and the battery replacement batteries. The electric energy output by the charged fixed batteries can be transmitted to the energy storage converter again. The energy storage converter converts the direct current into alternating current, and then supplies energy to the charging pile in the vehicle charging device 5. The charged battery replacement batteries can be directly taken out from the battery cabinet and installed in the new energy carrier such as the electric forklift and the transport vehicle matched with the battery type, and then supply energy to the battery replacement carrier.

[0028] The control cabinet 8 is electrically connected with the photovoltaic module 2, the energy storage unit 4 and the vehicle charging device 5, respectively. The control cabinet 8 can be used to remotely control the operation mode of the photovoltaic module 2, the energy storage unit 4 and the vehicle charging device 5, and monitor the operation state of the photovoltaic module 2, the energy storage unit 4 and the vehicle charging device 5.

[0029] In summary, the embodiment provides a photovoltaic storage and charging integrated power control system based on an industrial park. Through the arrangement of the multi-stage photovoltaic module 2, the utilization rate of space and solar energy resources is effectively improved, and the supply capacity of clean power energy of the system is increased. The energy storage unit 4 is provided with fixed batteries and battery replacement batteries, which increases the total capacity of the energy storage unit 4 and the load use path, realizes the full consumption of clean energy, and at the same time, realizes the integrated control and monitoring of the photovoltaic module 2, the energy storage unit 4 and the vehicle charging device 5 by using the control cabinet 8, which effectively improves the management efficiency of the photovoltaic storage and charging integrated power control system.

[0030] Next, the structure and function of the photovoltaic storage and charging integrated power control system based on an industrial park provided by the embodiment will be described in further detail.

[0031] Preferably, in the embodiment, the first-stage photovoltaic module, the second-stage photovoltaic module and the third-stage photovoltaic module are respectively provided with a plurality of single-crystal solar cell panels and photovoltaic supports. In the first-stage photovoltaic module, the second-stage photovoltaic module and the third-stage photovoltaic module, the plurality of single-crystal solar cell panels are connected in series and / or in parallel. The installation angle of the photovoltaic support is adjusted to limit the inclination angle of the single-crystal solar cell panel to the horizontal reference surface to 20°-50°, thereby ensuring that the photovoltaic module 2 can fully absorb and utilize solar energy.

[0032] Preferably, in the embodiment, the energy storage unit 4 is externally provided with a movable container body, the movable container body carries the energy storage unit 4 and can be flexibly arranged in the surrounding area of the vehicle charging device 5, the fixed battery and the battery replacement battery are stored in the battery rack in the movable container body, in order to simplify the access operation of the battery replacement battery, the movable container body is divided into a fixed battery storage area and a battery replacement battery storage area, only the staff has access permission to the fixed battery storage area, all personnel can freely enter the battery replacement battery storage area, and the battery replacement battery can be taken out and stored. The movable container body is provided with a mounting bracket 3 at the bottom, so that the energy storage unit 4 has a certain gap with the ground, and the side wall of the movable container body is provided with a plurality of ventilation holes for assisting heat dissipation of the energy storage unit 4.

[0033] Preferably, in the embodiment, the movable container body is internally provided with an active cooling device, the active cooling device is electrically connected with the control cabinet 8, the active cooling device includes a liquid cooling plate, a liquid cooling pipeline, a cooling pump and a liquid cooling unit, the liquid cooling unit is internally provided with a condenser and an evaporator, the liquid outlet of the liquid cooling unit is connected with the cooling pump, the liquid cooling plate and the liquid inlet of the liquid cooling unit in sequence through the liquid cooling pipeline, to establish a cooling liquid circulation loop, the liquid cooling plate is laid in the battery rack and contacts the surfaces of the fixed battery and the battery replacement battery to realize heat exchange, the active cooling device can effectively manage the temperature of the heat storage unit, and ensure that the fixed battery and the battery replacement battery are stably in a safe temperature range during charging or discharging.

[0034] Preferably, in the embodiment, the movable container body is internally provided with a fire extinguishing device, the fire extinguishing device is electrically connected with the control cabinet 8, the fire extinguishing device includes a temperature sensor, a smoke sensor, a flammable gas sensor and a buzzer, when the fire extinguishing device detects temperature abnormalities, smoke or flammable gas in the movable container body, the buzzer sends an alarm, and the fire extinguishing device sends alarm information to the control cabinet 8, the control cabinet 8 can enable the energy storage converter to cut off the power transmission between the energy storage unit 4 and the AC bus 11, to ensure the safe use of the energy storage unit 4.

[0035] Preferably, in the present embodiment, the energy storage unit 4 is provided with a battery management system BMS, which includes a battery management unit BMU, a battery cluster control unit BCU, a battery array control unit BAU, a high-voltage disconnection box BDU, a high-voltage control board, an analog front end AFE, a microcontroller MCU, a coulometer, a temperature protection and detection assembly, a communication module, and a battery active balancing module. The battery management unit BMU is the core control unit of the energy storage unit 4, which is used to collect and aggregate various parameters of the energy storage unit 4, and adjust the charging and discharging process of the energy storage unit 4. The battery cluster control unit BCU is used to monitor each fixed battery and battery swap battery, and transmit the battery monitoring data to the battery management unit BMU. The battery array control unit BAU coordinates the work of multiple battery cluster control units BCU, to ensure the consistency and stability of the battery array of the energy storage unit 4. The high-voltage disconnection box BDU is used to disconnect the connection between the battery and the external circuit in emergency situations. The high-voltage control board is responsible for processing the control logic of the high-voltage circuit. The analog front end AFE connects the physical sensor and the microcontroller MCU, and is used to preprocess the detection data output by the physical sensor. The microcontroller MCU is used to perform complex algorithms to perform state estimation, fault detection, protection action judgment, and other tasks of the energy storage unit 4, and generates control instructions output to the battery cluster control unit BCU, the high-voltage disconnection box BDU, etc. The coulometer is used to accurately measure the state of charge of the battery, i.e. the proportion of the current remaining capacity to the total capacity. The temperature protection and detection assembly is used to monitor the temperature parameters of the battery and its surrounding environment. The communication module enables remote communication between the energy storage unit 4 and the control cabinet 8. The battery active balancing module can transfer the energy of high-energy batteries to low-energy batteries, reduce the differences between batteries, maintain the consistency of the state of charge and voltage of each battery in the battery cluster, thereby prolonging the service life of the battery and improving its performance, and reducing the subsequent operation and maintenance cost.

[0036] Preferably, in the present embodiment, the control cabinet 8 is arranged in the electrical room 7, which provides a physical barrier for the control cabinet 8, and can assist the control cabinet 8 to realize integrated management of the photovoltaic module 2, the energy storage unit 4, the vehicle charging device 5, the active cooling device, and the fire extinguishing device. The control cabinet 8 includes a manual operation mode and an automatic operation mode. In the manual operation mode, the operating personnel can directly intervene in the operation of the photovoltaic storage and charging integrated electric energy control system through the control cabinet 8, such as manually starting / stopping the equipment, manually setting parameters, etc., to ensure that the photovoltaic storage and charging integrated electric energy control system can be manually controlled in emergency situations. In the automatic operation mode, the system manages the operation of all equipment according to the preset logic and algorithm, without human intervention, such as automatic energy scheduling, automatic fault repair, charging and discharging strategy optimization, etc., to improve the automation level and intelligent degree of the photovoltaic storage and charging integrated electric energy control system.

[0037] Preferably, in the embodiment, a central control screen is further provided, which is electrically connected with the control cabinet 8, and can be used to display the total charging capacity, total discharging capacity, daily charging capacity, daily discharging capacity, photovoltaic power curve, charging and discharging power, SOH, SOC, PCS operating state, active cooling device operating state, fire-fighting device operating state, and vehicle charging device 5 usage state, so as to realize the visualization function of the operation data of the photovoltaic storage and charging integrated electric energy control system.

[0038] Preferably, in the embodiment, the AC bus 11 is further connected with the commercial power supply, and the control cabinet 8 can be used to control the connection and disconnection of the AC bus 11 and the commercial power supply. In the valley electricity stage, the sunlight energy is weak at night, and there are more vehicles that need to be charged, and the electricity fee is lower in the valley electricity stage. Therefore, the control cabinet 8 can control the AC bus 11 to simultaneously use the commercial power supply and the photovoltaic module 2 to charge the energy storage unit 4 and supply energy to the vehicle charging device 5, so as to ensure that the photovoltaic storage and charging integrated electric energy control system has sufficient energy supply. In the peak electricity stage, the sunlight energy is sufficient, and the control cabinet 8 can control the AC bus 11 to only use the photovoltaic module 2 to charge the energy storage unit 4 and supply energy to the vehicle charging device 5. Through the flexible switching of the circuit energy supply mode in the peak and valley electricity period, the electricity cost can be effectively reduced, and the stable power supply voltage can be ensured. The above describes the embodiments of the utility model in detail in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments. Even if various changes are made to the utility model, if the changes belong to the scope of the utility model claim and its equivalent technology, they still fall within the protection scope of the utility model.

Claims

1. A photovoltaic-storage-charging integrated power control system based on an industrial park, characterized in that, include: Photovoltaic modules, vehicle charging devices, energy storage units, control cabinets and AC busbars; The photovoltaic module includes a primary photovoltaic module, a secondary photovoltaic module, and a tertiary photovoltaic module. The primary photovoltaic module is installed on the roof of the industrial park building, the secondary photovoltaic module is installed on the top of the vehicle charging device's shed, and the tertiary photovoltaic module is installed on the top of the external building of the energy storage unit. The primary, secondary, and tertiary photovoltaic modules are respectively connected to the AC bus via photovoltaic inverters. The vehicle charging device is connected to the AC bus; The energy storage unit includes several fixed batteries and swappable batteries. The energy storage unit is connected to the AC bus via an energy storage converter. The energy storage unit is configured to charge the fixed batteries and the swappable batteries with electrical energy generated by photovoltaic modules. The charged fixed batteries are used to power the vehicle charging device, and the charged swappable batteries are used to power the swappable vehicle. The control cabinet is electrically connected to the photovoltaic module, the energy storage unit, and the vehicle charging device, respectively, and is used to remotely control the operating mode of the photovoltaic module, the energy storage unit, and the vehicle charging device, and to monitor the operating status of the photovoltaic module, the energy storage unit, and the vehicle charging device.

2. The photovoltaic-storage-charging integrated power control system based on an industrial park as described in claim 1, characterized in that, The primary photovoltaic module, the secondary photovoltaic module, and the tertiary photovoltaic module are each provided with a plurality of monocrystalline solar panels. In the primary photovoltaic module, the secondary photovoltaic module, and the tertiary photovoltaic module, the plurality of monocrystalline solar panels are connected in series and / or in parallel, and the tilt angle of the monocrystalline solar panels with respect to the horizontal reference plane is limited to 20°-50°.

3. The photovoltaic-storage-charging integrated power control system based on an industrial park as described in claim 1, characterized in that, The energy storage unit is equipped with a movable container body. The fixed battery and the swapping battery are stored in separate areas in the battery rack inside the movable container body. The bottom of the movable container body is equipped with a mounting bracket, and the side wall is provided with several ventilation holes.

4. The photovoltaic-storage-charging integrated power control system based on an industrial park as described in claim 3, characterized in that, The movable container is equipped with an active cooling device, which is electrically connected to the control cabinet. The active cooling device includes a liquid cooling plate, liquid cooling pipes, a cooling pump, and a liquid cooling unit. The liquid cooling unit is connected to the liquid cooling plate and the cooling pump through the liquid cooling pipes to establish a coolant circulation loop. The liquid cooling plate is laid in the battery rack and contacts the surfaces of the fixed battery and the battery swapping battery to achieve heat exchange.

5. The photovoltaic-storage-charging integrated power control system based on an industrial park as described in claim 4, characterized in that, The movable container is equipped with a fire-fighting device, which is electrically connected to the control cabinet. The fire-fighting device includes a temperature sensor, a smoke sensor, a combustible gas sensor, and a buzzer. When the fire-fighting device sounds an alarm, the control cabinet enables the energy storage converter to cut off the power transmission between the energy storage unit and the AC bus.

6. The photovoltaic-storage-charging integrated power control system based on an industrial park as described in claim 1, characterized in that, The energy storage unit is equipped with a battery management system (BMS), which includes a battery management unit (BMU), a battery cluster control unit (BCU), a battery array control unit (BAU), a high-voltage disconnect box (BDU), a high-voltage control board, an analog front-end (AFE), a microcontroller (MCU), a fuel gauge, a temperature protection and detection component, a communication module, and a battery active balancing module.

7. The photovoltaic-storage-charging integrated power control system based on an industrial park as described in claim 1, characterized in that, The control cabinet is located in the electrical room, and the control cabinet includes a manual operation mode and an automatic operation mode.

8. The photovoltaic-storage-charging integrated power control system based on an industrial park as described in claim 5, characterized in that, A central control screen is provided, which is electrically connected to the control cabinet. It is used to realize the data visualization function of total system charging amount, total discharging amount, daily charging amount, daily discharging amount, photovoltaic power curve, charging and discharging power, SOH, SOC, PCS operating status, operating status of the active cooling device, operating status of the fire protection device, and usage status of the vehicle charging device.

9. The photovoltaic-storage-charging integrated power control system based on an industrial park as described in claim 1, characterized in that, The AC bus is also connected to the mains power supply and is configured such that during off-peak hours, the control cabinet can control the AC bus to simultaneously use the mains power and the photovoltaic modules to charge the energy storage unit and supply power to the vehicle charging device. During peak hours, the control cabinet can control the AC bus to use only the photovoltaic modules to charge the energy storage unit and supply power to the vehicle charging device.

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