Novel energy storage high-voltage convergence cabinet

Abstract

The utility model discloses a novel energy storage high-voltage confluence cabinet, a battery system circuit and a circuit power supply for providing electric energy for the battery system circuit are arranged in the high-voltage confluence cabinet, and the battery system circuit comprises a BMS master controller, a plurality of battery cluster loops, a plurality of BMS master controllers and a BMS slave controller; the BMS master controller controls all the BMS master controllers and communicates with an external system through the wiring terminals. Each BMS master controller is correspondingly connected with and controls one battery cluster loop; the battery cluster loop is connected with the positive electrode and the negative electrode of the battery cluster through the wiring terminal; the battery cluster loop is provided with a main relay, a fuse and a circuit breaker, the main relay controls the on-off of the battery cluster loop, the fuse protects the short circuit abnormity of the battery cluster loop, and the circuit breaker controls the on-off of the battery cluster loop; the battery system circuit is connected with the positive electrode and the negative electrode of the PCS through wiring terminals. According to the scheme of combining the energy storage high-voltage box and the conflux cabinet, the cost is reduced, the wiring efficiency is improved, and the safety of the energy storage system is improved.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage combiner cabinet technology for energy storage, and in particular to a novel high-voltage combiner cabinet for energy storage. Background Technology

[0002] With the rapid development of the energy storage industry, electrochemical energy storage is being installed more and more on the power grid and in industrial and commercial sectors, leading to increasingly fierce competition. How to effectively reduce the cost of the entire energy storage system has become a crucial issue for every manufacturer. This patent addresses this by combining a high-voltage energy storage box and a combiner cabinet, thereby reducing costs while simultaneously improving the safety of the energy storage system.

[0003] Existing technical solutions:

[0004] The high-voltage box for energy storage is designed as a separate box, containing the main control unit of the BMS. Similarly, the combiner cabinet is designed as a separate cabinet, containing the central control unit of the BMS.

[0005] Disadvantages of existing technology:

[0006] High cost, many components, complex design, and troublesome wiring. Utility Model Content

[0007] The purpose of this utility model is to provide a new type of high-voltage energy storage combiner cabinet to overcome the shortcomings of the existing technology.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] This application discloses a novel high-voltage combiner cabinet for energy storage. The high-voltage combiner cabinet is equipped with a battery system circuit and a circuit power supply that provides power to the battery system circuit. The battery system circuit includes a BMS master control, several battery cluster circuits, and several BMS master control and BMS slave control.

[0010] The BMS master controller controls all BMS main controllers and communicates with external systems through wiring terminals; each BMS main controller is connected to and controls a corresponding battery cluster circuit; the battery cluster circuit is connected to the positive and negative terminals of the battery cluster through wiring terminals.

[0011] The battery cluster circuit is equipped with a main relay, a fuse, and a circuit breaker. The main relay controls the on / off state of the battery cluster circuit, the fuse protects against short circuits in the battery cluster circuit, and the circuit breaker controls the on / off state of the battery cluster circuit.

[0012] The battery system circuit is connected to the positive and negative terminals of the PCS via terminals.

[0013] Preferably, the battery cluster circuit is provided with a pre-charge branch, and a pre-charge relay and a pre-charge resistor are connected in series on the pre-charge branch.

[0014] Preferably, the main relay includes a main positive relay and a main negative relay, located at the positive and negative terminals of the battery cluster circuit, respectively, and is used to control the on / off state of the positive and negative terminals of the battery cluster circuit.

[0015] Preferably, a shunt is provided on the battery cluster circuit, and the shunt is connected to the BMS main controller for current data acquisition by the BMS.

[0016] Preferably, the battery system circuit is equipped with a main circuit breaker, a power meter, and a surge protector; the main circuit breaker is connected to the BMS main control to control the on / off of the main circuit after all battery cluster circuits are combined; the power meter collects the power status of the entire battery system circuit; and the surge protector is used to protect the components of the entire high-voltage combiner cabinet.

[0017] Preferably, the battery system circuit is equipped with a meter fuse and a Hall sensor, the Hall sensor being used to reduce current; the meter fuse being used to prevent overcurrent in the meter.

[0018] Preferably, the system also includes several PACK fans, the number of which corresponds to the number of battery clusters; the battery system circuit is connected to the fan power supply via terminals to power the PACK fans.

[0019] Each PACK fan's power supply circuit is equipped with a small electromagnetic relay, which is connected to and controlled by the BMS main controller.

[0020] The beneficial effects of this utility model are:

[0021] This invention combines a high-voltage energy storage box and a combiner cabinet; it integrates the BMS's central control and main control into a single cabinet, along with related electrical control equipment and a communication system. This protects the entire battery system and energy storage system (preventing overcharging / over-discharging / over-temperature), and facilitates communication with external systems to ensure efficient and safe operation of the battery pack. It revolutionizes existing designs, reduces costs, improves wiring efficiency, and enhances the safety of the energy storage system.

[0022] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0023] Figure 1 This is an electrical schematic diagram of a novel high-voltage energy storage combiner cabinet according to this utility model. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0025] This utility model discloses a novel high-voltage combiner cabinet for energy storage. The high-voltage combiner cabinet is equipped with a battery system circuit and a power supply circuit that provides power to the battery system circuit. The battery system circuit includes a BMS master control, several battery cluster circuits, and several BMS master control and BMS slave control.

[0026] The BMS master controller controls all BMS main controllers and communicates with external systems through wiring terminals; each BMS main controller is connected to and controls a corresponding battery cluster circuit; the battery cluster circuit is connected to the positive and negative terminals of the battery cluster through wiring terminals.

[0027] The battery cluster circuit is equipped with a main relay, a fuse, and a circuit breaker. The main relay controls the on / off state of the battery cluster circuit, the fuse protects against short circuits in the battery cluster circuit, and the circuit breaker controls the on / off state of the battery cluster circuit.

[0028] The battery system circuit is connected to the positive and negative terminals of the PCS via terminals;

[0029] The battery cluster circuit includes a pre-charge branch, on which a pre-charge relay and a pre-charge resistor are connected in series. A shunt is also included in the battery cluster circuit, connected to the BMS main controller for current data acquisition. The battery system circuit includes a main circuit breaker, a meter, and a surge protector; the main circuit breaker, connected to the BMS main controller, controls the connection and disconnection of the main circuit after all battery cluster circuits have converged; the meter collects the power consumption of the entire battery system circuit; and the surge protector protects the components of the entire high-voltage combiner cabinet. The battery system circuit also includes a meter fuse and a Hall effect sensor; the Hall effect sensor reduces current, and the meter fuse prevents overcurrent. Several PACK fans are also included, the number corresponding to the number of battery clusters; the battery system circuit connects to the fan power supply via terminals to power the PACK fans. Each PACK fan's power supply circuit includes a small electromagnetic relay, which is connected to and controlled by the BMS main controller.

[0030] Example 1:

[0031] See Figure 1 This utility model provides a novel energy storage high-voltage combiner cabinet; its principle is as follows:

[0032] High-voltage combiner cabinets include: fuses, shunts, relays, pre-charge resistors, circuit breakers, Hall effect sensors, surge protectors, meters, BMS main controllers, BMS master controllers, terminal blocks, miniature electromagnetic relays, switching power supplies, housings, and other components and materials.

[0033] Terminal 1: Used to connect the positive terminal of the battery pack;

[0034] Terminal 2: Used to connect the negative terminal of the battery pack;

[0035] Fuse 1: Protects the positive circuit to prevent circuit abnormalities caused by short circuits;

[0036] Shunt: Diverts the current in the main circuit to facilitate current data acquisition by the BMS master controller;

[0037] Relay 1: This is a pre-charge relay, which is the switching element of the pre-charge circuit. During system startup, it closes before the main contactor (main relay), connecting the pre-charge resistor to the high-voltage circuit and limiting the initial charging current. After pre-charging is complete, the main relay closes, the pre-charge relay opens, and the system enters normal operating mode. This prevents the main relay from burning out its contacts due to arcing caused by high current when directly connected to high voltage.

[0038] Relay 2: Main positive relay, receives BMS main control, controls the on / off state of the positive terminal in a certain battery cluster circuit;

[0039] Relay 3: Main negative relay, receives BMS main control, controls the on / off of the negative terminal in a certain battery cluster circuit;

[0040] Pre-charge resistor: limits inrush current and stabilizes system voltage;

[0041] Circuit breaker 2: It receives BMS main control to control the on / off of a certain battery cluster circuit, and also has the ability to disconnect to protect the line;

[0042] Circuit breaker 3: It receives BMS master control and controls the opening and closing of the main circuit after the battery clusters are connected. It also has the ability to disconnect and protect the line.

[0043] Hall effect sensor: Reduces the current in the main circuit to facilitate data acquisition by DC meters;

[0044] Electricity meter: DC electricity meter, which collects and displays the electrical energy status of the entire system;

[0045] Fuse 2: Protects the electricity meter from damage due to overcurrent;

[0046] Surge protector: Protects the entire energy storage high-voltage combiner cabinet from damage to components caused by surge impact;

[0047] Terminal 3: Connect to the positive terminal of PCS;

[0048] Terminal 4: Connect to the negative terminal of PCS;

[0049] Terminal 5: Connect to the fan power supply on the battery pack;

[0050] Terminal 6: Connect to the BMS slave power supply;

[0051] Terminal 7: Connects to the BMS slave communication on the PACK;

[0052] Miniature electromagnetic relay: Controlled by the BMS master control, the coil closes when the battery temperature reaches the set value, providing power to the fan and thus achieving the battery cooling effect.

[0053] BMS main controller: Protects the safety of a battery cluster (prevents overcharging / over-discharging / over-temperature) and ensures efficient and safe operation of the battery pack;

[0054] BMS central control: Protects the safety of the entire battery system and the entire energy storage system (preventing overcharging / over-discharging / over-temperature), and communicates with external systems to ensure the efficient and safe operation of the battery pack;

[0055] Switching power supply 1: Converts AC power to DC power to supply power to the fan;

[0056] Switching power supply 2: Converts AC power to DC power, and the BMS provides power (including slave controller, master controller, and main controller).

[0057] Terminal 8: Connects to an external 220V AC power supply to provide power to the fan;

[0058] Terminal 9: Connects to an external AC 220V source to provide power to the BMS (including slave controllers, master controllers, and main controllers).

[0059] Terminal 10: Used for communication with external devices (PCS, EMS, etc.), receiving and sending corresponding DI and DO ports, and performing related linkage control.

[0060] Example 2: Replace the circuit breaker in Example 1 with a fuse + disconnector, while keeping the rest unchanged;

[0061] Example 3: Replace the shunt and Hall sensor in Example 1, leaving the rest unchanged;

[0062] This invention combines a high-voltage energy storage box and a combiner cabinet, which reduces costs, improves wiring efficiency, and enhances the safety of the energy storage system.

[0063] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel energy storage high-voltage combiner cabinet, characterized in that: The high-voltage combiner cabinet is equipped with a battery system circuit and a power supply circuit that provides power to the battery system circuit. The battery system circuit includes a BMS master control, several battery cluster circuits, and several BMS master control and BMS slave control. The BMS master controller controls all BMS main controllers and communicates with external systems through wiring terminals; each BMS main controller is connected to and controls a corresponding battery cluster circuit; the battery cluster circuit is connected to the positive and negative terminals of the battery cluster through wiring terminals. The battery cluster circuit is equipped with a main relay, a fuse, and a circuit breaker. The main relay controls the on / off state of the battery cluster circuit, the fuse protects against short circuits in the battery cluster circuit, and the circuit breaker controls the on / off state of the battery cluster circuit. The battery system circuit is connected to the positive and negative terminals of the PCS via terminals.

2. The novel energy storage high-voltage combiner cabinet as described in claim 1, characterized in that: The battery cluster circuit is provided with a pre-charge branch, and a pre-charge relay and a pre-charge resistor are connected in series on the pre-charge branch.

3. The novel energy storage high-voltage combiner cabinet as described in claim 1, characterized in that: The main relay includes a main positive relay and a main negative relay, which are located at the positive and negative terminals of the battery cluster circuit, respectively, and are used to control the on / off state of the positive and negative terminals of the battery cluster circuit.

4. The novel energy storage high-voltage combiner cabinet as described in claim 1, characterized in that: A shunt is provided on the battery cluster circuit, and the shunt is connected to the BMS main controller for the acquisition of current data by the BMS.

5. A novel energy storage high-voltage combiner cabinet as described in claim 1, characterized in that: The battery system circuit is equipped with a main circuit breaker, a power meter, and a surge protector; the main circuit breaker is connected to the BMS main control to control the on / off of the main circuit after all battery cluster circuits are combined; the power meter collects the power status of the entire battery system circuit; the surge protector is used to protect the components of the entire high-voltage combiner cabinet.

6. The novel energy storage high-voltage combiner cabinet as described in claim 5, characterized in that: The battery system circuit is equipped with a meter fuse and a Hall sensor. The Hall sensor is used to reduce current, and the meter fuse is used to prevent the meter from overcurrent.

7. A novel energy storage high-voltage combiner cabinet as described in claim 1, characterized in that: It also includes several PACK fans, the number of which corresponds to the number of battery clusters; the battery system circuit is connected to the fan power supply via terminals to power the PACK fans.

8. A novel energy storage high-voltage combiner cabinet as described in claim 7, characterized in that: Each PACK fan's power supply circuit is equipped with a small electromagnetic relay, which is connected to and controlled by the BMS main controller.

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