A lithium battery based energy system

Abstract

This application discloses a lithium battery-based energy system, which includes a lithium battery pack, a power distribution unit, a battery management unit, and a control panel. The lithium battery pack is used to manage the DC bus voltage during discharge and control the current during charging. The power distribution unit is used to manage the power distribution of the lithium battery pack. The battery management unit is used for constant voltage DC remote power supply from the bidirectional DC-DC converter circuit. The control panel is used to display battery parameter information and adjust parameter information. This solution enables the lithium battery energy system to have the ability to output constant current or constant voltage in both charging and discharging modes.

Description

Technical Field

[0001] This application relates to artificial intelligence, and to, but is not limited to, a lithium battery-based energy system. Background Technology

[0002] Currently, in scenarios where high-power batteries are used for power supply, the main energy systems consist of traditional lead-acid batteries and conventional lithium batteries. Among them, lead-acid batteries have a long history of development, mature and stable technology, and are widely used in communication base stations.

[0003] Existing technology can only output a constant current at a fixed value in charging mode, and cannot output a constant current or constant voltage in discharging mode. Summary of the Invention

[0004] In view of this, embodiments of this application provide an energy system based on lithium batteries.

[0005] The technical solution of this application embodiment is implemented as follows: This application provides a lithium battery-based energy system, comprising: a lithium battery pack, a power distribution unit, a battery management unit, and a control panel; the lithium battery pack is used to manage the DC bus voltage during discharge and control the current during charging; the power distribution unit is used to manage the power distribution of the lithium battery pack; the battery management unit is used for constant voltage DC remote power supply from a bidirectional DC-DC converter circuit; and the control panel is used to display battery parameter information and adjust the parameter information.

[0006] Optionally, the battery management unit includes: a battery control module and a conversion module; the battery control module is used for monitoring the voltage and temperature of the battery cells, and calculating the state of charge of the battery; the conversion module is used for constant voltage DC remote supply from the bidirectional DC-DC converter circuit.

[0007] Optionally, the lithium battery pack includes: a priority module; the priority module is used to set priorities for the connected battery strings and specify the discharge stage.

[0008] Optionally, the power distribution unit includes: an energy management module; the energy management module is used to formulate charging and discharging strategies based on usage scenarios.

[0009] Optionally, the power distribution unit further includes: a 4G wireless module and a fault alarm module; the 4G wireless module is used to transmit battery status and operating data to external communication devices; the fault alarm module is used to detect system faults and issue alarms.

[0010] Optionally, the system includes: a GPS module; the GPS module is used to acquire location information and operating parameters in real time.

[0011] Optionally, the GPS module includes: a 4G communication submodule and an external antenna interface; the 4G communication module is used for data transmission, reception, and verification; the external antenna interface is used to set preset antenna gain, preset impedance, preset carrier frequency, and preset bandwidth center point.

[0012] Optionally, the external antenna interface includes: a preset antenna gain of 30dB, a preset impedance of 50Ω, a preset carrier frequency of 10MHz, and a preset bandwidth center point of 0dBW.

[0013] Optionally, the system includes: an intelligent fire-fighting module; the intelligent fire-fighting module is used for temperature detection, and triggers a fire extinguishing operation when the temperature reaches a preset value.

[0014] Optionally, the system includes: a quick interface module; the quick interface module is used for splicing multiple devices to expand capacity.

[0015] This application provides a lithium battery-based energy system, which includes a lithium battery pack, a power distribution unit, a battery management unit, and a control panel. The lithium battery pack is used to manage the DC bus voltage during discharge and control the current during charging. The power distribution unit is used to manage the power distribution of the lithium battery pack. The battery management unit is used for constant voltage DC remote power supply from the bidirectional DC-DC converter circuit. The control panel is used to display battery parameter information and adjust parameter information. This solution enables the lithium battery energy system to have the ability to output constant current or constant voltage in both charging and discharging modes. Attached Figure Description

[0016] Figure 1 A schematic diagram of a lithium battery-based energy system provided for an embodiment of this application; Figure 2 Another schematic diagram of a lithium battery-based energy system provided for an embodiment of this application; Figure 3 Another schematic diagram of a lithium battery-based energy system provided in an embodiment of this application. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] like Figure 1 , Figure 2 , Figure 3As shown, this application embodiment provides a lithium battery-based energy system, including: a lithium battery pack, a power distribution unit, a battery management unit, and a control panel; the lithium battery pack is used to manage the DC bus voltage during discharge and control the current during charging; the power distribution unit is used to manage the power distribution of the lithium battery pack; the battery management unit is used for constant voltage DC remote power supply of the bidirectional DC-DC converter circuit; the control panel is used to display battery parameter information and adjust parameter information, solving the problem that traditional technology only outputs a constant current at a fixed value in charging mode, while this solution has the ability to output constant current or constant voltage in both charging and discharging modes.

[0019] Specifically, this system includes: an S1 pull-out lithium battery energy system main body, which is equipped with S2 intelligent lithium battery pack, S3 power distribution unit, S4 battery management system (BMS+DCDC), S5 quick interface, S6 GPS module, S7 control display panel, S8 intelligent fire protection module, etc.

[0020] 1. S1 pull-box type lithium battery energy system main body: The intelligent trolley case portable lithium battery energy system consists of 16 series S2 single-cell lithium battery packs, S3 power distribution unit, S4 battery management system (BMS), S5 quick interface, S6 GPS module, S7 control display panel, S8 intelligent fire protection system, and chassis shell, etc. It has good charging and discharging characteristics, cycle characteristics, longer service life, and a relatively intelligent self-management mode. It is simple and convenient to operate and easy to maintain.

[0021] The suitcase-style design facilitates transportation between different stations and allows for quick access to stations.

[0022] 2. S2 battery pack: Employing intelligent lithium batteries, a single intelligent trolley case portable lithium battery pack can be used as an independent 48V module, or multiple packs can be used in parallel. It also supports parallel use with conventional 48V lithium battery packs and 48V lead-acid battery packs. It provides overcharge, over-discharge, overcurrent, over-temperature, under-temperature, short circuit, and reverse connection protection for the battery pack. It also provides voltage balancing during charging. Reliable parallel connection of multiple packs can be achieved via CAN bus, and communication with a host computer or background monitoring system is possible via RS485 bus, with a maximum of 32 parallel packs. Parameter configuration, data monitoring, and software upgrades are performed on the host computer software or background monitoring platform. The intelligent lithium battery can be used in combination with ordinary batteries of different types, batches, capacities, and service ages. It controls other batteries by managing the DC bus voltage during discharge and controlling the current during charging. During discharge, the intelligent lithium battery prioritizes the connected battery strings and sets these batteries to discharge at designated stages.

[0023] Note: Any type of battery string that meets the operating voltage range of 40Vdc~54Vdc (lithium) or 43Vdc~54Vdc (VRLA) can be used in combination with smart lithium batteries.

[0024] (1) Series + Smart Lithium Battery Hybrid (2) A series + intelligent lithium battery hybrid (3) Parallel application of conventional lithium battery + smart lithium battery Manufacturing process technology The positive and negative terminals of the battery cell are separated by an insulating partition to prevent short circuits from occurring when the positive and negative terminals come into contact. Voltage and temperature sampling cables are routed through fixed cable trays; The positive and negative terminals of the module are isolated by a PC protective cover to avoid the risk of electric shock upon contact. The battery cells are connected in series using laser welding, which allows for the transmission of large currents and is more secure than screw connections, preventing poor contact caused by thermal expansion and contraction.

[0025] 3. S3 Power Distribution Unit: The intelligent power distribution unit enables battery monitoring and subsequent function expansion. It is primarily used to manage and optimize the power distribution of the lithium battery pack, ensuring safe and efficient system operation. Its main functions include: 1) Battery Management Status monitoring: Real-time monitoring of battery parameters such as voltage, current, and temperature.

[0026] Balanced management: The equalization circuit maintains the voltage of each individual cell in the battery pack at the same level, thus extending battery life.

[0027] 2) Power distribution Dynamic allocation: Power is intelligently allocated according to load demand to ensure stable system operation.

[0028] Priority management: Power is supplied to different loads according to preset priorities to ensure power supply for critical equipment.

[0029] 3) Protection functions Overcharge / over-discharge protection: Prevents the battery from being overcharged or over-discharged, thus avoiding damage.

[0030] Overcurrent / short circuit protection: Cuts off the circuit in case of overcurrent or short circuit to protect the battery and load.

[0031] Temperature protection: Monitors temperature to prevent overheating and potential hazards.

[0032] 4) Communication and Monitoring Data communication: Through the built-in 4G wireless module of the smart energy gateway, it communicates with external systems to transmit battery status and operating data. It can also access the smart energy cloud platform via 4G wireless to achieve peak shaving and valley filling, realizing intelligent energy conservation and emission reduction.

[0033] Remote monitoring: Supports remote monitoring and control, facilitating real-time management and troubleshooting.

[0034] 5) Energy Management Optimize charging and discharging: Optimize charging and discharging strategies based on usage scenarios to improve efficiency.

[0035] 6) Fault diagnosis and alarm Fault diagnosis: Automatically detects and diagnoses system faults and provides solutions.

[0036] Alarm function: Issues an alarm in abnormal situations to remind users to take timely action.

[0037] 7) User Interface Display and Operation: Provides a display screen for users to view status and perform operations.

[0038] 4. S4 Battery Management System (BMS): Internally divided into two parts: BMU (Battery Management Unit) and BDC (Brain DC-DC converter). The BMU monitors the voltage and temperature of individual battery cells, calculates SOC, controls operational logic strategies, sets parameters, and performs external communication. The BDC is a bidirectional DC-DC converter between the battery pack and the main backup power circuit, used to perform constant current and constant voltage charging and discharging, standby, and protection functions, achieving low-loss DC remote power supply.

[0039] The intelligent lithium battery has an adjustable operating voltage, and transmission loss is significantly reduced even when DC remote power supply is required. Rated capacity is 100Ah, with a constant output voltage of -57VDC (adjustable from -40V to -57V).

[0040] 5. S6 GPS module: Figure 1 The S6 GPS module is installed in the internal compartment of the case, providing real-time location information and operating parameters for the smart portable lithium battery trolley case, and enabling anti-theft functionality.

[0041] The GPS module motherboard adopts a hardware design integrating a 4G communication module and an external antenna interface. Typically, the G4 female connector of the GPS module and the G5 male connector of the external antenna are connected via a threaded connector. Power is supplied by a button-type zinc-plated battery, which is easy to replace. Data transmission, reception, and verification are performed through the communication module. The antenna requirements for the GPS module are as follows: (1) The antenna gain should be 30dB and the impedance should be 50Ω.

[0042] (2) Requirements for wireless frequency signal environment: the carrier frequency of RF input L1 should be 10MHz and the center point of bandwidth should be 0dBW.

[0043] 6. S7 Control Display Panel: The intelligent trolley-style portable lithium battery energy system display panel shows information such as battery voltage, current, and alarms. It can be used for parameter configuration and monitoring settings, and realizes a human-machine interface.

[0044] 7. S8 Intelligent Firefighting: Modular intelligent firefighting, rapid detection + green agents, clean extinguishing agent perfluorohexanone, combined with pulse start to achieve efficient fire extinguishing.

[0045] Detection scheme: Temperature detection, automatically triggered when it reaches 190℃±15℃, requiring no human intervention; Extinguishing agent: Perfluorohexanone, a clean extinguishing agent, combined with pulse ignition for highly efficient fire suppression.

[0046] Compared with the prior art, the advantages of this application are: 1. Smart lithium batteries control other mixed-use batteries by managing the DC bus voltage during discharge and controlling the current during charging. During discharge, the smart lithium battery sets priorities for connected battery strings and sets different batteries to discharge at designated stages. The collected bus voltage is compared with the set priority voltage, and the higher-priority battery cell discharges first. This solves the problem of high production costs associated with configuring a mixed-use management module within the battery pack for existing mixed-use lithium and lead-acid batteries. Furthermore, the bus voltage acquisition and monitoring method eliminates the need to modify the internal cell arrangement of new and old batteries; the bus and monitoring module are directly configured externally to the battery cell, greatly reducing the difficulty and cost of connecting mixed batteries. This is a key technology for mixed-use batteries and an important means of revitalizing existing battery resources, and it must be protected.

[0047] 2. This solution utilizes a BDC (Bidirectional Direct Current Converter) circuit to regulate the output voltage of the intelligent lithium battery to a constant -57VDC (adjustable range -40V to -57V), achieving low-loss DC remote power supply. Using this proposal, transmission loss is reduced by 12.4% under DC remote power supply conditions. Reducing transmission loss under DC remote power supply conditions is a technical means to ensure power supply for remote base stations, offering advantages in reducing energy consumption and saving costs, and should be protected.

[0048] 3. The GPS positioning anti-theft function of the lithium battery power system, through technological improvements such as integrating a 4G communication module and an external antenna, enhances satellite signal sensitivity and real-time location information reporting, ensuring the effectiveness of the GPS anti-theft function. Compared to existing solutions, the automatic fire safety triggering function using perfluorohexanone offers significant improvements in both GPS positioning anti-theft and automatic fire safety triggering. It has advantages in ensuring the normal operation and safety of all functions of the portable lithium battery power system and should be protected.

[0049] Furthermore, the battery management unit includes: a battery control module and a conversion module; the battery control module is used for monitoring the voltage and temperature of the battery cells, as well as calculating the state of charge of the battery; the conversion module is used for constant voltage DC remote supply to the bidirectional DC-DC converter circuit.

[0050] Furthermore, the lithium battery pack includes: a priority module; the priority module is used to set priorities for the connected battery strings and specify the discharge stage.

[0051] Furthermore, the power distribution unit includes: an energy management module; the energy management module is used to formulate charging and discharging strategies based on usage scenarios.

[0052] Furthermore, the power distribution unit also includes: a 4G wireless module and a fault alarm module; the 4G wireless module is used to transmit battery status and operating data to external communication devices; the fault alarm module is used to detect system faults and issue alarms.

[0053] Furthermore, the system includes: a GPS module; the GPS module is used to acquire location information and operating parameters in real time.

[0054] Furthermore, the GPS module includes: a 4G communication submodule and an external antenna interface; the 4G communication module is used for data transmission, reception, and verification; the external antenna interface is used to set the preset antenna gain, preset impedance, preset carrier frequency, and preset bandwidth center point.

[0055] Furthermore, the external antenna interface includes: a preset antenna gain of 30dB, a preset impedance of 50Ω, a preset carrier frequency of 10MHz, and a preset bandwidth center point of 0dBW.

[0056] Furthermore, the system includes: an intelligent fire protection module; the intelligent fire protection module is used for temperature detection, and when the temperature reaches a preset value, it triggers a fire extinguishing operation.

[0057] Furthermore, the system includes: a quick interface module; the quick interface module is used for splicing multiple devices to expand capacity.

[0058] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A lithium battery based energy system, characterized in that, The system includes: a lithium battery pack, a power distribution unit, a battery management unit, and a control panel; The lithium battery pack is used to manage the DC bus voltage during discharge and control the current during charging; The power distribution unit is used to manage the power distribution of the lithium battery pack; The battery management unit is used for constant voltage DC remote power supply to the bidirectional DC-DC converter circuit; The control panel is used to display battery parameter information and to adjust those parameters.

2. The system of claim 1, wherein, The battery management unit includes: a battery control module and a conversion module; The battery management module is used for monitoring the voltage and temperature of the battery cells, as well as calculating the state of charge of the battery. The conversion module is used for constant voltage DC remote power supply of the bidirectional DC-DC converter circuit.

3. The system of claim 2, wherein, The lithium battery pack includes: a priority module; The priority module is used to set the priority for the connected battery string and specify the discharge stage.

4. The system of claim 3, wherein, The power distribution unit includes: an energy management module; The energy management module is used to formulate charging and discharging strategies based on usage scenarios.

5. The system of claim 4, wherein, The power distribution unit also includes: a 4G wireless module and a fault alarm module; The 4G wireless module is used to transmit battery status and operating data to external communication devices; The fault alarm module is used to detect system faults and issue alarms.

6. The system of claim 5, wherein, The system includes: a GPS module; The GPS module is used to acquire location information and operating parameters in real time.

7. The system according to claim 6, characterized in that, The GPS module includes: a 4G communication submodule and an external antenna interface; The 4G communication module is used for data transmission, reception, and verification; The external antenna interface is used to set the preset antenna gain, preset impedance, preset carrier frequency, and preset bandwidth center point.

8. The system according to claim 7, characterized in that, The external antenna interface includes: a preset antenna gain of 30dB, a preset impedance of 50Ω, a preset carrier frequency of 10MHz, and a preset bandwidth center point of 0dBW.

9. The system according to claim 8, characterized in that, The system includes: an intelligent fire protection module; The intelligent fire protection module is used for temperature detection. When the temperature reaches a preset value, it triggers a fire extinguishing operation.

10. The system according to claim 9, characterized in that, The system includes: a fast interface module; The fast interface module is used to connect multiple devices to expand capacity.

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