High-voltage household energy storage box

Abstract

The utility model relates to the field of energy storage, and particularly discloses a high-voltage household energy storage box which is characterized in that a bottom plate is provided with a plug-in connector used for plugging a battery pack and at least one positioning column used for positioning, a box body is internally provided with a battery pack controller and a battery pack control circuit, and a side panel of the box body is provided with a converter connector used for plugging an energy storage converter; the input end of the battery pack control circuit is connected with the converter connector to access the input current of the energy storage converter, the output end is connected with the plug-in connector to be connected to the positive and negative electrodes of the battery pack, the control end is connected with the battery pack controller, and the battery pack controller controls power-on and power-off of the system through the battery pack control circuit and collects battery pack data. A standardized interface is arranged to facilitate battery replacement and installation, and the installation and maintenance efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage, specifically to a high-voltage household energy storage box. Background Technology

[0002] High-voltage residential energy storage boxes typically refer to high-voltage energy storage devices installed on the household user side. They are generally integrated with photovoltaic (PV) power generation systems, using high-voltage technology to store and release electrical energy. These devices can release electricity during peak household electricity consumption periods to reduce grid load, and recharge the grid or the user's own PV panels during off-peak periods, thus achieving efficient energy utilization. Traditional high-voltage residential energy storage boxes suffer from a lack of standardized interfaces, making battery pack replacement and installation inconvenient and causing numerous problems for users. Summary of the Invention

[0003] To address the aforementioned issues, this utility model provides a high-voltage household energy storage box with standardized interfaces for easy battery replacement and installation, thereby improving installation and maintenance efficiency.

[0004] The technical solution of this utility model is: a high-voltage household energy storage box, including a box body (1) and a bottom plate (7), a plug-in connector (8) for inserting a battery pack and at least one positioning post (9) for positioning, a battery pack controller (10) and a battery pack control circuit are provided inside the box body (1), and a converter connector (5) for inserting an energy storage converter is provided on the side plate of the box body (1).

[0005] The input terminal of the battery pack control circuit is connected to the inverter connector (5) to receive the input current of the energy storage inverter, and the output terminal is connected to the plug connector (8) to connect to the positive and negative terminals of the battery pack. The control terminal is connected to the battery pack controller (10). The battery pack controller (10) controls the power-on and power-off of the system and collects battery pack data through the battery pack control circuit.

[0006] In an alternative implementation, the battery pack control circuit includes a main positive relay (15), a main negative relay (16), a precharge relay (17), a precharge resistor (18), and a current sensor (19).

[0007] The high voltage input terminal of the main positive relay (15) is connected to the positive output terminal of the energy storage converter, the high voltage output terminal is connected to the positive terminal of the battery pack, and the low voltage terminal is connected to the first control interface of the battery pack controller (10).

[0008] The high voltage input terminal of the pre-charge relay (17) is connected to the high voltage input terminal of the main positive relay (15), the high voltage output terminal is connected to the first terminal of the pre-charge resistor (18), and the low voltage terminal is connected to the second control interface of the battery pack controller (10); the second terminal of the pre-charge resistor (18) is connected to the positive terminal of the battery pack.

[0009] The high voltage input terminal of the main negative relay (16) is connected to the negative output terminal of the energy storage converter via the detection terminal of the current sensor (19), the high voltage output terminal is connected to the negative terminal of the battery pack, and the low voltage terminal is connected to the third control interface of the battery pack controller (10).

[0010] The output of the current sensor (19) is connected to the current detection interface of the battery pack controller (10).

[0011] In an optional implementation, the high voltage input terminal of the main positive relay (15), the second terminal of the pre-charge resistor (18), and the negative terminal of the battery pack are also connected to the voltage detection interface of the battery pack controller (10).

[0012] In an optional implementation, a positive circuit breaker (13) is provided between the positive output terminal of the energy storage converter and the high-voltage input terminal of the main positive relay (15), and a negative circuit breaker (14) is provided between the negative output terminal of the energy storage converter and the circuit sensor; a first fuse (20) is provided between the high-voltage output terminal of the main negative relay (16) and the negative terminal of the battery pack.

[0013] In an optional embodiment, a DC-DC power supply (11) is also provided inside the housing (1). The negative input terminal of the DC-DC power supply (11) is connected to the negative terminal of the battery pack via a fuse, and the positive input terminal is connected to the positive terminal of the battery pack via a second fuse (12). The output terminal is connected to the power interface of the battery pack controller (10) via a power switch button (2). The power switch button (2) is located on the front panel of the housing (1).

[0014] In an optional embodiment, a display screen (3) is provided on the front panel of the housing (1), and the display screen (3) is connected to the display interface of the battery pack controller (10).

[0015] In an optional embodiment, a network port (4) is also provided on the side panel of the housing (1), which is connected to the communication interface of the battery pack controller (10).

[0016] In an optional embodiment, a fixed support plate (6) is provided on the housing (1).

[0017] In an alternative implementation, the battery pack controller (10) is a BMU controller.

[0018] This utility model provides a high-voltage residential energy storage box, which, compared to existing technologies, offers the following advantages: The base plate features plug-in connectors and positioning posts, providing standardized interfaces for easy and quick battery pack placement and connection, simplifying the installation process, reducing maintenance costs, and allowing users to easily replace or expand the battery pack according to actual needs, thus improving the flexibility and scalability of the energy storage system. The battery pack controller and control circuitry are integrated into the box, reducing external wiring, decreasing the box size, and facilitating installation. Furthermore, the converter connector on the side panel facilitates connection to the energy storage converter, further improving installation and maintenance efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a high-voltage household energy storage box structure provided by an embodiment of the present invention. Figure 1 .

[0021] Figure 2 This is a schematic diagram of a high-voltage household energy storage box structure provided by an embodiment of the present invention. Figure 2 .

[0022] Figure 3 This is a schematic diagram of the internal component layout structure of a high-voltage household energy storage box (1) provided in an embodiment of this utility model.

[0023] Figure 4 This is a schematic diagram of the battery pack control circuit of a high-voltage household energy storage box provided in this embodiment of the utility model.

[0024] Figure 5 This is a circuit diagram of a high-voltage household energy storage box provided in an embodiment of the present invention.

[0025] In the diagram, 1-box, 2-power switch button, 3-display screen, 4-network port, 5-inverter connector, 6-fixed support plate, 7-base plate, 8-plug connector, 9-positioning post, 10-battery pack controller, 11-DC-CDC power supply, 12-second fuse, 13-positive circuit breaker, 14-negative circuit breaker, 15-main positive relay, 16-main negative relay, 17-pre-charge relay, 18-pre-charge resistor, 19-current sensor, 20-first fuse. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following implementation methods.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] This embodiment provides a high-voltage residential energy storage box, which is a high-voltage power circuit management unit specifically designed for residential energy storage systems. It serves as an intermediate unit connecting the battery pack and the energy storage converter. The energy storage box has functions such as battery pack voltage and charging / discharging current acquisition, battery pack circuit contactor control, and protection. The energy storage box is equipped with circuit breakers, contactors, fuses, current sensors, a battery cluster control and management module, and a switching power supply.

[0029] like Figures 1-3 As shown, the high-voltage residential energy storage box in this embodiment includes a box body 1 and a base plate 7. A mating connector 8 and at least one positioning post 9 are provided on the base plate 7. A battery pack controller 10 and a battery pack control circuit are provided inside the box body 1. A converter connector 5 is provided on the side panel of the box body 1.

[0030] The mating connectors 8 on the base plate 7 are used to connect the battery pack for electrical and communication connections. To facilitate mating between the mating connectors 8 and the battery pack, positioning posts 9 are provided on the base plate 7. For example, one positioning post 9 is provided at each of the four corners of the base plate 7, which can be used for mating and positioning with the corresponding battery pack.

[0031] The converter connector 5 is used to connect to the energy storage converter to receive the input current of the energy storage converter. For example, the converter connector 5 is located on the left side panel of the housing 1 and includes a positive plug, a positive socket, a negative plug, and a negative socket.

[0032] The input terminal of the battery pack control circuit is connected to the inverter connector 5 to receive the input current of the energy storage inverter, and the output terminal is connected to the plug-in connector 8 to connect to the positive and negative terminals of the battery pack. The control terminal is connected to the battery pack controller 10. The battery pack controller 10 controls the power supply and shutdown of the system and collects battery pack data through the battery pack control circuit. It should be noted that all components of the battery pack control circuit are housed inside the enclosure 1.

[0033] like Figures 4-5As shown, the battery pack control circuit of this embodiment includes a main positive relay 15, a main negative relay 16, a pre-charge relay 17, a pre-charge resistor 18, and a current sensor 19. The high-voltage input terminal of the main positive relay 15 is connected to the positive output terminal of the energy storage converter, the high-voltage output terminal is connected to the positive terminal of the battery pack, and the low-voltage terminal is connected to the first control interface of the battery pack controller 10. The high-voltage input terminal of the pre-charge relay 17 is connected to the high-voltage input terminal of the main positive relay 15, the high-voltage output terminal is connected to the first terminal of the pre-charge resistor 18, and the low-voltage terminal is connected to the second control interface of the battery pack controller 10; the second terminal of the pre-charge resistor 18 is connected to the positive terminal of the battery pack. The high-voltage input terminal of the main negative relay 16 is connected to the negative output terminal of the energy storage converter via the detection terminal of the current sensor 19, the high-voltage output terminal is connected to the negative terminal of the battery pack, and the low-voltage terminal is connected to the third control interface of the battery pack controller 10. The output terminal of the current sensor 19 is connected to the current detection interface of the battery pack controller 10.

[0034] In this embodiment, the current sensor 19 is a Hall sensor. The battery pack controller 10 obtains the battery pack charging and discharging current from the current sensor 19 through the current detection interface, thereby realizing the acquisition of the battery pack charging and discharging current. In this embodiment, the battery pack controller 10 can also acquire the battery pack voltage. Specifically, the high-voltage input terminal of the main positive relay 15, the second terminal of the pre-charge resistor 18, and the negative terminal of the battery pack are respectively connected to the voltage detection interface of the battery pack controller 10, and the battery pack controller 10 acquires the battery pack voltage through the voltage detection interface. The battery pack status is detected by acquiring the battery pack charging and discharging current and voltage.

[0035] To achieve circuit protection, in this embodiment, a positive circuit breaker 13 is provided between the positive output terminal of the energy storage converter and the high-voltage input terminal of the main positive relay 15, and a negative circuit breaker 14 is provided between the negative output terminal of the energy storage converter and the circuit sensor; a first fuse 20 is provided between the high-voltage output terminal of the main negative relay 16 and the negative terminal of the battery pack.

[0036] In this embodiment, the battery pack controller 10 is powered by a DC-DC power supply 11, which draws power from the battery pack. The negative input terminal of the DC-DC power supply 11 is connected to the negative terminal of the battery pack via a fuse, and the positive input terminal is connected to the positive terminal of the battery pack via a second fuse 12. The output terminal is connected to the power interface of the battery pack controller 10 via the power switch button 2. It should be noted that the fuse between the negative input terminal of the DC-DC power supply 11 and the negative terminal of the battery pack can be implemented using a first fuse 20. The power switch button 2 is located on the front panel of the housing 1. When the user turns on the power switch button 2, the DC-DC power supply 11 draws power from the battery pack to power the battery pack controller 10, and the battery pack controller 10 operates.

[0037] In this embodiment, a display screen 3 is provided on the front panel of the housing 1. The display screen 3 is connected to the display interface of the battery pack controller 10, and the battery pack controller 10 displays the detected battery pack charging and discharging current, voltage, and other signals on the display screen 3. Simultaneously, a network port 4 is provided on the side panel of the housing 1, which is connected to the communication interface of the battery pack controller 10. The battery pack controller 10 can transmit the collected battery pack charging and discharging current, voltage, and other signals to a remote location via the network port 4. For example, the network port 4 is located on the left side panel of the housing 1. Test ports, etc., can also be provided next to the network port 4. For ease of installation, this embodiment provides a fixing support plate 6 on the housing 1. For example, two L-shaped support plates are provided on each of the left and right side panels, and through holes are provided on the L-shaped support plates for fixing the energy storage box with bolts.

[0038] In this embodiment, the battery pack controller 10 is a BMU (Battery Monitoring Unit) controller. The BMU controller can be set on the main control board of the BMS (Battery Management System). The following logic is realized through the components in the energy storage box and their connection relationship: (1) Power supply of the BMS main control board: powered by the DCDC power supply 11. The input source of the DCDC power supply 11 is the battery pack B+ and B-, and the output is 24V DC power. (2) Internal communication of BMS: The BMS main control board and the acquisition board in the battery pack communicate through the plug-in connector 8 using a daisy-chain twisted pair cable with redundancy design. The BMS main control board communicates with the display screen 3 through the CAN bus. (3) External communication of BMS: The BMS main control board communicates with the energy storage converter through the CAN bus or RS485 bus. (4) System power-on: After the user presses the power button 2, the BMS main control board is powered on, and the main negative relay 16 and the pre-charge relay 17 are closed to provide soft start for the energy storage converter. After a successful soft start, the main positive relay 15 is closed, and the pre-charge relay 17 is opened. The high-voltage power-on of the system is now complete. (5) Power off the system: When the user presses the power button 2, the BMS main control board disconnects all high-voltage relays and the system is powered off. (6) Current acquisition: The BMS main control board acquires the charging and discharging current of the battery pack through the Hall sensor.

[0039] The above-disclosed embodiments are merely preferred embodiments of the present utility model, but the present utility model is not limited thereto. Any non-creative changes that can be conceived by those skilled in the art, as well as any improvements and modifications made without departing from the principle of the present utility model, should fall within the protection scope of the present utility model.

Claims

1. A high-voltage household energy storage box, characterized in that, Includes a housing (1) and a base plate (7). The base plate (7) has a plug-in connector (8) for inserting the battery pack and at least one positioning post (9) for positioning. The housing (1) is equipped with a battery pack controller (10) and a battery pack control circuit. The side panel of the housing (1) is equipped with a converter connector (5) for inserting the energy storage converter. The input terminal of the battery pack control circuit is connected to the inverter connector (5) to receive the input current of the energy storage inverter, and the output terminal is connected to the plug connector (8) to connect to the positive and negative terminals of the battery pack. The control terminal is connected to the battery pack controller (10). The battery pack controller (10) controls the power-on and power-off of the system and collects battery pack data through the battery pack control circuit.

2. The high-voltage household energy storage box according to claim 1, characterized in that, The battery pack control circuit includes a main positive relay (15), a main negative relay (16), a precharge relay (17), a precharge resistor (18), and a current sensor (19). The high voltage input terminal of the main positive relay (15) is connected to the positive output terminal of the energy storage converter, the high voltage output terminal is connected to the positive terminal of the battery pack, and the low voltage terminal is connected to the first control interface of the battery pack controller (10). The high voltage input terminal of the pre-charge relay (17) is connected to the high voltage input terminal of the main positive relay (15), the high voltage output terminal is connected to the first terminal of the pre-charge resistor (18), and the low voltage terminal is connected to the second control interface of the battery pack controller (10); the second terminal of the pre-charge resistor (18) is connected to the positive terminal of the battery pack. The high voltage input terminal of the main negative relay (16) is connected to the negative output terminal of the energy storage converter via the detection terminal of the current sensor (19), the high voltage output terminal is connected to the negative terminal of the battery pack, and the low voltage terminal is connected to the third control interface of the battery pack controller (10). The output of the current sensor (19) is connected to the current detection interface of the battery pack controller (10).

3. The high-voltage household energy storage box according to claim 2, characterized in that, The high voltage input terminal of the main positive relay (15), the second terminal of the pre-charge resistor (18), and the negative terminal of the battery pack are also connected to the voltage detection interface of the battery pack controller (10).

4. The high-voltage household energy storage box according to claim 2 or 3, characterized in that, A positive circuit breaker (13) is provided between the positive output terminal of the energy storage converter and the high voltage input terminal of the main positive relay (15), and a negative circuit breaker (14) is provided between the negative output terminal of the energy storage converter and the circuit sensor; a first fuse (20) is provided between the high voltage output terminal of the main negative relay (16) and the negative terminal of the battery pack.

5. The high-voltage household energy storage box according to claim 2 or 3, characterized in that, The enclosure (1) is also equipped with a DC-DC power supply (11). The negative input terminal of the DC-DC power supply (11) is connected to the negative terminal of the battery pack via a fuse, and the positive input terminal is connected to the positive terminal of the battery pack via a second fuse (12). The output terminal is connected to the power interface of the battery pack controller (10) via a power switch button (2). The power switch button (2) is located on the front panel of the enclosure (1).

6. The high-voltage household energy storage box according to claim 1, 2 or 3, characterized in that, The front panel of the housing (1) is equipped with a display screen (3), which is connected to the display interface of the battery pack controller (10).

7. The high-voltage household energy storage box according to claim 1, 2 or 3, characterized in that, The side panel of the enclosure (1) is also equipped with a network port (4), which is connected to the communication interface of the battery pack controller (10).

8. The high-voltage household energy storage box according to claim 1, 2 or 3, characterized in that, A fixed support plate (6) is provided on the box body (1).

9. The high-voltage household energy storage box according to claim 1, 2 or 3, characterized in that, The battery pack controller (10) is a BMU controller.

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