Intelligent energy storage system in bus advertising board application scene

Abstract

The utility model relates to an intelligent energy storage system in a bus billboard application scene, which comprises a battery pack, a battery current sensor P, a UPS host NB1, a UPS host NB2, an STS host static switch, an audible and visual alarm, an AC / DC detection module, a human-computer interface, a GPRS module and an auxiliary power supply, 220V commercial power is divided into two paths, and one path is connected with the UPS host NB1 and the UPS host NB2. A lithium iron phosphate battery is adopted in the system, the system has the energy storage capacity of 40 kWh, the alternating current output voltage is 220 V and 50 Hz, and the rated power is 5 kW. The system design is used for outdoor cabinet installation and is equipped with an air conditioner and a fire extinguishing system so as to ensure stable operation and safety protection in various environments. According to the system, 24-hour uninterrupted scene playing of the bus advertising board is realized through an intelligent control strategy, and the advertising effect and the city image are improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to an intelligent energy storage system for the application scenario of bus advertising billboards. Background Technology

[0002] Some bus advertising billboards rely on streetlights for power. Streetlights are only powered at night, meaning the billboards cannot operate continuously 24 hours a day, impacting advertising effectiveness and the city's image. To address this issue, this invention proposes an intelligent energy storage system that provides continuous 24-hour power for bus advertising. Utility Model Content

[0003] This invention proposes an intelligent energy storage system for bus advertising billboard applications to solve the problems mentioned in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A smart energy storage system for a bus advertising billboard application scenario includes a battery pack, a battery current sensor P, UPS main units NB1 and NB2, an STS main unit static switch, an audible and visual alarm, an AC / DC detection module, a human-machine interface, a GPRS module, and an auxiliary power supply. The 220V AC mains power is divided into two paths: one path connects to UPS main units NB1 and NB2, and the other path connects to the STS main unit static switch via a bypass input switch S1. The STS main unit static switch connects to the STS maintenance switch S3, AC output switches S4 and S5, the auxiliary power supply, and a PDU power strip via the AC main output switch S2. The AC output switches S4 and S5 are connected to the PDU power strip. The STS main unit outputs 220V AC power. The STS main unit static switch is also connected to UPS main units NB1 and NB2 via UPS output switch S6. The STS maintenance switch S3 is also connected to UPS main units NB1 and NB2 respectively. The battery pack is connected to UPS main units NB1, NB2, the audible and visual alarm and the DC48V cabinet air conditioner in sequence via battery fuse FU, battery switch S7 and battery current sensor P. The audible and visual alarm is also connected to the AC / DC detection module, which is also connected to the human-machine interface. The human-machine interface is also connected to the GPRS module. The auxiliary power supply is connected to the audible and visual alarm, the AC / DC detection module, the human-machine interface, the GPRS module and the cabinet cooling fan respectively.

[0006] As a further technical solution of this utility model: the battery pack is composed of multiple 48V battery packs connected in series.

[0007] As a further technical solution of this utility model: the output voltage of the auxiliary power supply is 24V DC.

[0008] As a further technical solution of this utility model: the battery current sensor P is a Hall sensor.

[0009] As a further technical solution of this utility model: the UPS host NB1 and the UPS host NB2 are connected by a circulating line.

[0010] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0011] 1. Provide a stable power supply to ensure the bus advertising billboards operate normally around the clock.

[0012] 2. High-capacity lithium iron phosphate batteries are used to ensure the system's high energy storage capacity and long lifespan.

[0013] 3. Achieve intelligent control, including battery management, high-voltage power distribution, AC / DC charging and discharging, and static transfer switching.

[0014] 4. Equipped with air conditioning and fire protection systems to ensure stable operation and safety protection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall principle of this utility model.

[0016] Figure 2 This is a front view of the structure of this utility model.

[0017] Figure 3 This is a rear view of the structure of this utility model.

[0018] Figure 4 This is a side view of the structure of this utility model.

[0019] Figure 5 This is a schematic diagram of the secondary system of this utility model.

[0020] Figure 6 This is a schematic diagram of the power supply scheme for the energy storage system of this utility model.

[0021] Figure 7 This is a schematic diagram of the STS static changeover switch of this utility model. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides, for example Figures 1-7 The drawings shown depict a smart energy storage system for a bus advertising billboard application scenario, including:

[0024] 1. Energy storage system configuration: Lithium iron phosphate cells are used, with 1P6S cells forming a 5kWh energy storage battery module, and 4 battery modules forming a 40kWh energy storage system.

[0025] Cell selection: 200Ah lithium iron phosphate cells are selected as the energy storage unit because they have high energy density, good thermal stability and long cycle life.

[0026] Module configuration: Six 200Ah lithium iron phosphate cells are connected in series using a 1P6S (1 in parallel and 6 in series) configuration to form an energy storage battery module whose voltage and capacity meet the design requirements.

[0027] Module design: Each module is designed with a capacity of 5kWh and a nominal voltage of 48V to accommodate standard DC power supply systems.

[0028] Battery Management System (BMS) Integration: A BMS is integrated into each module to monitor battery parameters such as voltage, current, and temperature in real time, ensuring that the battery operates within a safe operating range and achieving balanced charging of the battery.

[0029] Thermal management design: Considering that lithium iron phosphate cells generate heat during charging and discharging, the module design includes effective thermal management measures, such as heat sinks, fans or liquid cooling systems, to keep the cell temperature within a suitable range.

[0030] Structural Design: The module's structural design takes into account mechanical stability and electrical safety, employing robust housing and insulation materials, as well as safety mechanisms to prevent short circuits and overheating.

[0031] Interface design: The module design includes standardized electrical interfaces, which facilitate connection with other modules or systems, enabling easy expansion and maintenance.

[0032] 2. High-voltage power distribution unit (PDU): Composed of fuses, circuit breakers, contactors, shunts, BMS main control, etc., it is responsible for the system's overload protection and current detection.

[0033] The main functions of each component are as follows:

[0034] Fuse (FU): Provides overload or short-circuit protection for the circuit;

[0035] Circuit breaker (QF): The main output switch of the battery system, which disconnects the circuit when the system encounters abnormal operating conditions;

[0036] Shunt (FL): Used for BMS current sensing and data acquisition;

[0037] Contactor (KM): Controls the charging and discharging circuit;

[0038] BMS Master Control: As the control center, it is responsible for monitoring the entire system's operation, data processing, control strategy implementation, and communication control.

[0039] 3. Battery Management System (BMS): It contains four 16S2P battery modules, with a total of eight slave controllers and one master controller. It is responsible for collecting the voltage and temperature of the battery modules and executing the equalization strategy.

[0040] The main functions of each part are as follows:

[0041] Slave control: It realizes the acquisition of individual cell voltage and temperature of battery module and is responsible for the execution of equalization strategy, etc.

[0042] Main controller: Acquisition of battery pack voltage, current, and insulation information; control of contactors for battery protection; and communication with external systems.

[0043] 4. AC / DC charging and discharging system: Equipped with a 5kW AC / DC converter to realize the conversion between AC and DC power.

[0044] The main functions of each part are as follows:

[0045] Input EMI and protection circuit: Used to effectively filter out electromagnetic interference from the input AC power, ensuring stable system operation. The protection circuit includes fuses, common-mode inductors, and X capacitors to prevent the circuit from being affected by voltage surges and electromagnetic interference.

[0046] Rectifier and filter circuits: The rectifier circuit converts alternating current (AC) into a pulsating direct current (DC) voltage, which is then smoothed by the filter circuit. The filter circuit includes a rectifier bridge and filter capacitors, used to eliminate the AC component and obtain a smoother DC voltage.

[0047] Power factor correction (PFC) circuit: Improves the power factor and reduces grid harmonic pollution. It controls the input grid current to prevent distortion while stabilizing the output high-voltage bus voltage.

[0048] DC-DC converter: As a downstream DC-DC circuit, it precisely controls the output voltage or current to meet different application requirements.

[0049] Control circuit: Controlled using a microcontroller or DSP (Digital Signal Processor). The PWM signal is adjusted by real-time monitoring of parameters such as output voltage and current to ensure stable and high-quality output.

[0050] Auxiliary power supply circuit: Provides necessary auxiliary power to the entire system to ensure the normal operation of each part of the circuit.

[0051] Voltage regulator circuit: It outputs a stable voltage and is usually composed of a voltage regulator. The output voltage can be adjusted through feedback.

[0052] Output protection circuit: Protects the load and power supply circuit. Common output protection circuits include overcurrent protection, overvoltage protection, and short circuit protection.

[0053] Communication interface: Supports communication and control with third-party devices, such as CAN / RS485 communication interface.

[0054] 5. Static Transfer Switch (STS): Designed using the high-speed static contactless switching principle, it enables safe and rapid switching of AC power supply, ensuring a switching time of ≤4ms under resistive, inductive, or capacitive loads. It achieves rapid switching between main power supply and backup power supply, ensuring uninterrupted power supply to the load.

[0055] 6. Secondary power distribution system: Provides independent control switches and 220V single-phase AC power for outdoor cabinet air conditioners, switching power supplies, fire protection equipment, sockets and other AC electrical equipment.

[0056] 7. Air conditioning system: An industrial air conditioning system is configured to regulate the temperature inside the outdoor cabinet, with four working modes: cooling, heating, air supply, and dehumidification.

[0057] 8. Fire protection system: Each battery pack is equipped with one aerosol automatic fire extinguishing device, and the cabinet is equipped with two gas-thermal aerosol automatic fire extinguishing devices, which have automatic sensing and active prevention functions.

[0058] 9. Waterproofing measures: By adding waterproofing technology and raising the installation position, the problem of the bottom of the energy storage equipment being submerged is solved.

[0059] The working principle is as follows:

[0060] 1. Energy Storage System Design: Design a 40kWh energy storage system to address daytime electricity needs. The energy storage system is configured with a voltage of 220V to match the power supply conditions.

[0061] 2. Power Usage Schedule: The billboard screen will be in use from 6:30 AM to 10:00 PM, for a total of 15.5 hours. The energy storage system will supply power from 6:00 AM to 10:00 PM, for a total of 16 hours. Streetlights will be used for the remaining hours.

[0062] 3. Power Load Analysis: The main electrical equipment at the project site is an LCD display screen, characterized by low power consumption, low heat dissipation, and small size. The LCD screen itself does not emit light; it relies on a backlight to display colors. Therefore, the power consumption varies depending on the image being displayed.

[0063] 4. Annual Electricity Consumption Forecast: According to statistics, the average daily electricity consumption of a bus advertising screen is 16 kWh, and the average daily electricity consumption of air conditioning is calculated at 6 kWh. Losses are considered at 2% of the total electricity consumption. Therefore, the annual electricity consumption of the two advertising screens is approximately 16,381 kWh.

[0064] 5. Energy Storage Capacity Configuration: Each panel has an average power output of 0.9kW, for a total power output of 1.8kW for both panels. The energy storage facility will provide power for 16 hours, requiring a daily electricity consumption of 28.8kWh. Considering system efficiency and capacity reserves, the designed energy storage capacity is 40kWh to meet project requirements, ensure stable operation, and extend the lifespan of the energy storage equipment. The energy storage capacity is designed at 5kW / 40kWh.

[0065] 6. Power Supply Line Assessment: The existing street light power supply line uses BV-6mm² conductors with a current carrying capacity of 43A, providing a power of 9.46kW. At night, the street light power supply line needs to power energy storage charging and advertising screens, requiring a total power of 6.8kW, which is less than the power that the existing conductor diameter can provide, thus meeting the power supply requirements.

[0066] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment have been appropriately combined to form other embodiments that are easy for those skilled in the art to understand.

Claims

1. An intelligent energy storage system in a bus advertising board application scenario, comprising a battery pack, a battery current sensor P, a UPS host NB1, a UPS host NB2, a STS host static switch, an audible and visual alarm, an AC / DC detection module, a human-machine interface, a GPRS module and an auxiliary power supply, characterized in that, 220V mains is divided into two ways, one way is connected with UPS host NB1 and UPS host NB2, the other way is connected with STS host static switch through bypass input switch S1, STS host static switch is connected with STS maintenance switch S3, AC output switch S4, AC output switch S5, auxiliary power supply and PDU socket respectively through AC total output switch S2, AC output switch S4, AC output switch S5 and PDU socket all output 220V AC, STS host static switch is also connected with UPS host NB1 and UPS host NB2 through UPS output switch S6, STS maintenance switch S3 is also connected with UPS host NB1 and UPS host NB2 respectively, battery group is connected with UPS host NB1, UPS host NB2, sound and light alarm and DC48V cabinet air conditioner in turn through battery fuse FU, battery switch S7 and battery current sensor P, sound and light alarm is also connected with AC / DC detection module, AC / DC detection module is also connected with man-machine interface, man-machine interface is also connected with GPRS module, auxiliary power supply is connected with sound and light alarm, AC / DC detection module, man-machine interface, GPRS module and cabinet cooling fan respectively. 2.The intelligent energy storage system in a bus advertising board application scenario according to claim 1, characterized in that: The battery group is a plurality of 48V battery groups connected in series. 3.The intelligent energy storage system in a bus advertising board application scenario according to claim 1, characterized in that: The output voltage of the auxiliary power supply is 24V DC. 4.The intelligent energy storage system in a bus advertising board application scenario according to claim 1, characterized in that: The battery current sensor P adopts a Hall sensor. 5.The intelligent energy storage system in a bus advertising board application scenario according to claim 1, characterized in that: The UPS host NB1 and the UPS host NB2 are connected through a circulating current line. The battery group is a plurality of 48V battery groups connected in series. The output voltage of the auxiliary power supply is 24V DC. The battery current sensor P adopts a Hall sensor. The UPS host NB1 and the UPS host NB2 are connected through a circulating current line.

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