An off-grid discharge system for an outdoor stand-alone battery

Abstract

This invention discloses an off-grid discharge system for an outdoor isolated battery, comprising the following modules: a main control board module; a bidirectional charge / discharge module for DC-DC conversion; a PCS converter module for energy exchange between the energy storage unit and the power grid, controlling the charging and discharging of the system and performing AC-DC conversion; an isolation transformer module; a DC contactor module for controlling the on / off state of the circuit; and charging guns for charging external electric vehicles. The main control board module is connected to the isolation transformer module, which is connected to both the PCS converter module and the bidirectional charge / discharge module. The output of the bidirectional charge / discharge module is connected to several charging guns, and a DC contactor module is provided between the charging guns and the bidirectional charge / discharge module. This invention features flexible layout, convenient installation, easy maintenance, and safe isolation. It can also communicate with the battery system's environmental control system and fire protection system to achieve comprehensive intelligent management functions.

Description

Technical Field

[0001] This invention belongs to the field of new energy battery swapping station technology, specifically relating to an off-grid discharge system for outdoor isolated batteries. Background Technology

[0002] In our daily work and life, we often use temporary electricity, which is usually supplied by traditional diesel generators. The main drawbacks of generators providing temporary electricity include high noise, environmental pollution, bulky and inconvenient equipment, many safety hazards, and complex management.

[0003] First, generators generate significant noise during operation, negatively impacting the surrounding environment and the hearing health of workers. Second, generators typically use fossil fuels such as gasoline, and their exhaust emissions pollute the environment. Furthermore, generator equipment is usually bulky and inconvenient to carry and move, limiting its use in certain situations. In terms of safety, providing temporary power via generators presents several hazards. Using untested or damaged electrical equipment can easily lead to electric shock accidents. Improperly installed temporary wiring can cause short circuits and leakage, increasing safety risks. Without leakage protection devices, power cannot be cut off promptly in the event of a leakage, increasing the probability of electric shock. At construction sites, multiple devices sharing a single power line can lead to overload, increasing fire risk. Regarding management, generator power supply requires complex operation and management processes, including adjusting the base load to avoid grid surges and special handling when there are no pre-reserved connection points in the distribution cabinet. These management complexities increase operating costs and operational difficulty. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An off-grid discharge system for an outdoor isolated battery includes the following modules:

[0006] Main control board module;

[0007] Bidirectional charge / discharge module: High-power non-isolated bidirectional DC-DC converter, used for DC-DC conversion in equipment;

[0008] PCS converter module: A device that enables energy exchange between the energy storage unit and the power grid, controls the charging and discharging of the system, and performs AC / DC conversion;

[0009] Isolation transformer module: used to change the current and voltage in a circuit;

[0010] DC contactor module: controls the on / off state of the control circuit;

[0011] Charging gun: Used to charge vehicles that use external electricity;

[0012] The main control board module is connected to the isolation transformer module, which is connected to the PCS converter module and the bidirectional charging and discharging module respectively. The output end of the bidirectional charging and discharging module is connected to several charging guns, and a DC contactor module is provided between the charging guns and the bidirectional charging and discharging module.

[0013] Furthermore, the charging gun is a national standard DC charging gun, wherein CC1 and CC2 lines are used for power connection confirmation, S + S - Communication lines used between off-board chargers and electric vehicles, DC + DC - The line is used to charge the battery pack, A + A - Connect to the off-board charger to provide low-voltage auxiliary power to the electric vehicle, with a ground wire connected in the middle.

[0014] Furthermore, it also includes a temperature and humidity system, a heat dissipation system, a three-phase electricity meter system, and a fire protection system, which are electrically connected to the main control board module.

[0015] Furthermore, the main control board module communicates with the bidirectional charging and discharging module and the PCS converter module via RS-485, and the main control board module communicates with the charging gun via CAN.

[0016] Furthermore, the main control board module communicates with the temperature and humidity system and the three-phase electricity meter system via 485 communication, and communicates with the heat dissipation system and the fire protection system via DO communication.

[0017] The beneficial effects of this invention are:

[0018] This invention comprises a highly integrated generator product consisting of a string-based centralized PCS power control module, DC-side power distribution protection, AC-side power distribution protection, intelligent monitoring, and a remote cloud platform. It can be used as a replacement for traditional diesel generators to address temporary power supply needs, such as for temporary power generation or mobile power supply. It features flexible deployment, convenient installation, easy maintenance, and secure isolation. The intelligent monitoring system can communicate with the EMS via wired connection or wirelessly with the cloud-based EMS system. Simultaneously, the intelligent monitoring system can monitor battery data in the battery system through communication with the BMS. It can also communicate with the battery system's environmental control system and fire protection system, achieving comprehensive intelligent management functions.

[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the system topology of the present invention;

[0021] Figure 2 This is a schematic diagram of the system architecture of the present invention;

[0022] Figure 3 This is a schematic diagram of the discharge process of the present invention;

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Main control board module; 2. Bidirectional charging and discharging module; 3. PCS converter module; 4. Isolation transformer module; 5. DC contactor module; 6. Charging gun; 7. Temperature and humidity system; 8. Heat dissipation system; 9. Three-phase meter system; 10. Fire protection system. Detailed Implementation

[0025] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention. Specific implementation examples:

[0027] like Figure 1-3 The off-grid discharge system for an outdoor isolated battery shown includes the following modules:

[0028] Main control board module 1;

[0029] Bidirectional charging and discharging module 2: High-power non-isolated bidirectional DC-DC converter, using advanced high-frequency PWM control, features fast response and high control accuracy, and can be used in equipment energy saving, energy storage, battery testing, microgrids and other fields requiring DC-DC conversion;

[0030] PCS Converter Module 3: The device that allows the energy storage unit to exchange energy with the power grid, controls the charging and discharging of the system, performs AC-DC conversion, and after the output voltage is raised to the level required by the power grid through the transformer, the converter can be connected to the power grid to achieve grid connection. In the absence of a power grid, it can directly supply power to AC loads.

[0031] Isolation transformer module 4: Used to change the current and voltage in the circuit;

[0032] DC contactor module 5: Controls the on / off state of the circuit;

[0033] Charging gun 6: Charges vehicles using external electricity; specifically, the charging gun 6 is a national standard DC charging gun, wherein CC1 and CC2 lines are used for power connection confirmation, S + S - Communication lines used between off-board chargers and electric vehicles, DC + DC- The line is used to charge the battery pack, A + A - Connect to the off-board charger to provide low-voltage auxiliary power to the electric vehicle, with a ground wire connected in the middle.

[0034] The main control board module 1 is connected to the isolation transformer module 4. The isolation transformer module 4 is connected to the PCS converter module 3 and the bidirectional charging and discharging module 2 respectively. The output end of the bidirectional charging and discharging module 2 is connected to several charging guns 6. A DC contactor module 5 is provided between the charging guns 6 and the bidirectional charging and discharging module 2.

[0035] Specifically, it also includes a temperature and humidity system 7, a heat dissipation system 8, a three-phase electricity meter system 9, and a fire protection system 10. These systems are electrically connected to the main control board module 1. The main control board module 1 communicates with the bidirectional charging and discharging module 2 and the PCS converter module 3 via RS-485, and with the charging gun 6 via CAN. The main control board module 1 communicates with the temperature and humidity system 7 and the three-phase electricity meter system 9 via RS-485, and with the heat dissipation system 8 and the fire protection system 10 via DO communication.

[0036] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An off-grid discharge system for an outdoor isolated battery, characterized in that... Includes the following modules: Main control board module (1); Bidirectional charge and discharge module (2): High-power non-isolated bidirectional DC-DC converter for device DC-DC conversion; PCS converter module (3): The device that enables energy exchange between the energy storage unit and the power grid, controls the charging and discharging of the system, and performs AC-DC conversion; Isolation transformer module (4): used to change the current and voltage in the circuit; DC contactor module (5): Control circuit on / off; Charging gun (6): used to charge external electric vehicles; The main control board module (1) is connected to the isolation transformer module (4), the isolation transformer module (4) is connected to the PCS converter module (3) and the bidirectional charging and discharging module (2) respectively, the output end of the bidirectional charging and discharging module (2) is connected to several charging guns (6), and a DC contactor module (5) is provided between the charging guns (6) and the bidirectional charging and discharging module (2).

2. The off-grid discharge system for an outdoor isolated battery according to claim 1, characterized in that: The charging gun (6) is a national standard DC charging gun, wherein the CC1 and CC2 lines are used for power connection confirmation, and S + S - Communication lines used between off-board chargers and electric vehicles, DC + DC - The line is used to charge the battery pack, A + A - Connect to the off-board charger to provide low-voltage auxiliary power to the electric vehicle, with a ground wire connected in the middle.

3. The off-grid discharge system for an outdoor isolated battery according to claim 1, characterized in that: It also includes a temperature and humidity system (7), a heat dissipation system (8), a three-phase electricity meter system (9), and a fire protection system (10), wherein the temperature and humidity system (7), the heat dissipation system (8), the three-phase electricity meter system (9), and the fire protection system (10) are electrically connected to the main control board module (1).

4. The off-grid discharge system for an outdoor isolated battery according to claim 1, characterized in that: The main control board module (1) communicates with the bidirectional charging and discharging module (2) and the PCS converter module (3) via 485 communication, and the main control board module (1) communicates with the charging gun (6) via CAN communication.

5. The off-grid discharge system for an outdoor isolated battery according to claim 1, characterized in that: The main control board module (1) communicates with the temperature and humidity system (7) and the three-phase meter system (9) via 485 communication, and communicates with the heat dissipation system (8) and the fire protection system (10) via DO communication.

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