Double battery cluster combination high voltage box

Abstract

The utility model discloses a double battery cluster combination high -voltage box, including the box, be provided with one way high -voltage main circuit, two battery cluster master units and one way voltage conversion circuit in the box, and high -voltage main circuit is connected with first battery cluster interface, second battery cluster interface and energy storage converter interface respectively, and the detection end of two battery cluster master units is connected with high -voltage main circuit respectively, and the first communication end of two battery cluster master units is connected with first battery cluster BMU interface and second battery cluster BMU interface correspondingly, and the second communication end of two battery cluster master units is connected with first battery cluster interface and second battery cluster interface respectively, the utility model discloses the advantage is: directly the positive pole circuit, negative pole circuit of two battery clusters are parallelly connected respectively, then are connected with external charge -discharge equipment through circuit breaker, make double battery cluster integration degree height, and control is convenient, and one battery cluster master unit is set up to each battery cluster, and two battery clusters can be collected and controlled respectively.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage box technology, and in particular to a dual-battery cluster combined high-voltage box. Background Technology

[0002] As a key component connecting battery clusters to the power grid in an energy storage system, the high-voltage box's design rationality and advancement directly affect the performance and lifespan of the entire energy storage system. In existing technologies, the high-voltage box of outdoor energy storage cabinets primarily only performs signal acquisition and high / low voltage control for single battery clusters, failing to acquire and control signals from multiple battery clusters. Multiple battery clusters require a separate high-voltage box for each cluster for acquisition and control, and a combiner cabinet is needed to combine the outputs from each high-voltage box, resulting in significant space requirements, cumbersome operation, and high costs. Summary of the Invention

[0003] This invention mainly solves the above-mentioned problems and provides a dual-battery cluster combined high-voltage box that is highly integrated, easy to control, and capable of separately collecting and controlling two battery clusters.

[0004] The technical solution adopted by this utility model to solve its technical problem is a dual-battery cluster combined high-voltage box for power management of the first and second battery clusters. The box includes a housing, which houses a high-voltage main circuit, two battery cluster main control units, and a voltage conversion circuit. The side wall of the housing is provided with interfaces for the first and second battery clusters, an energy storage converter, a first battery cluster BMU, a second battery cluster BMU, a first battery cluster communication interface, a second battery cluster communication interface, and an AC power interface. The high-voltage main circuit is connected to the first, second, and energy storage converter interfaces respectively. The detection terminals of the two battery cluster main control units are connected to the high-voltage main circuit. The first communication terminals of the two battery cluster main control units are respectively connected to the first and second battery cluster BMU interfaces. The second communication terminals of the two battery cluster main control units are respectively connected to the first and second battery cluster interfaces. The voltage conversion circuit is connected to the AC power interface to supply power to the two battery cluster main control units, the first battery cluster BMU, and the second battery cluster BMU.

[0005] As a preferred embodiment of the above scheme, the high-voltage main circuit includes a first battery cluster side circuit, a second battery cluster side circuit, and a circuit breaker. The first battery cluster side circuit is connected to the first battery cluster interface, and the second battery cluster side circuit is connected to the second battery cluster interface. Both the first battery cluster side circuit and the second battery cluster side circuit are connected to the energy storage converter interface through the circuit breaker.

[0006] As a preferred embodiment of the above scheme, both the first battery cluster circuit and the second battery cluster circuit include a positive branch and a negative branch. The positive branch includes a fuse and a main positive relay connected in series, and a pre-charge branch is connected in parallel across the two ends of the main positive relay. The negative branch includes a shunt and a main negative relay connected in series, and the main positive relay and the main negative relay are controlled by the battery cluster main control unit.

[0007] As a preferred embodiment of the above scheme, the pre-charge branch includes a pre-charge resistor and a pre-charge relay connected in series, and the pre-charge relay is controlled by the battery cluster main control unit.

[0008] As a preferred embodiment of the above scheme, the detection terminals of the two battery cluster main control units are respectively connected to the first battery cluster side circuit and the second battery cluster side circuit. The detection terminals of the battery cluster main control units include a current detection terminal, a voltage detection terminal and an insulation detection terminal.

[0009] As a preferred embodiment of the above scheme, the first communication terminal of the battery cluster main control unit is a CAN interface.

[0010] As a preferred embodiment of the above scheme, the second communication terminal of the battery cluster main control unit includes a CAN interface and a 485 interface, and the second communication terminals of the two battery cluster main control units are connected to each other.

[0011] As a preferred embodiment of the above scheme, the voltage conversion circuit includes a circuit breaker and an AC / DC conversion module connected in series, and the circuit breaker is connected to an AC power interface.

[0012] The advantages of this utility model are: the positive and negative circuits of the two battery clusters are directly connected in parallel inside the high-voltage box, and then connected to the external charging and discharging equipment through a circuit breaker, which makes the dual battery clusters more integrated and easier to control, and is suitable for use in distributed battery energy storage systems; each battery cluster is equipped with a corresponding battery cluster main control unit, which can collect and control the two battery clusters respectively. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the internal structure of the dual-battery cluster combined high-voltage box in the embodiment.

[0014] Figure 2 This is a side view of the high-voltage box with dual battery clusters in the embodiment.

[0015] Figure 3 This is an electrical schematic diagram of the dual-battery cluster combined high-voltage box in the embodiment.

[0016] 1-First battery cluster interface; 2-Energy storage converter interface; 3-Fuse; 4-Main positive relay; 5-Pre-charge relay; 6-Pre-charge resistor; 7-Circuit breaker; 8-Shunt unit; 9-Main negative relay; 10-Battery cluster main control unit; 11-AC power interface; 12-First battery cluster BMU interface; 13-First battery cluster communication interface; 14-Second battery cluster BMU interface; 15-Second battery cluster communication interface. Detailed Implementation

[0017] The technical solution of this utility model will be further described below through embodiments and in conjunction with the accompanying drawings.

[0018] Example: This embodiment provides a dual-battery cluster combined high-voltage box for power management of the first and second battery clusters, such as... Figures 1 to 3 As shown, the device includes a housing containing a high-voltage main circuit, two battery cluster main control units 10, and a voltage conversion circuit. The side wall of the housing has a first battery cluster interface 1, a second battery cluster interface, an energy storage converter interface 2, a first battery cluster BMU interface 12, a second battery cluster BMU interface 14, a first battery cluster communication interface 13, a second battery cluster communication interface 15, and an AC power interface 11. The high-voltage main circuit is connected to the first battery cluster interface 1, the second battery cluster interface, and the energy storage converter interface 2. The detection terminals of the two battery cluster main control units 10 are connected to the high-voltage main circuit. The first communication terminals of the two battery cluster main control units 10 are connected to the first battery cluster BMU interface 12 and the second battery cluster BMU interface 14, respectively. The second communication terminals of the two battery cluster main control units 10 are connected to the first battery cluster interface 13 and the second battery cluster interface 15, respectively. The voltage conversion circuit is connected to the AC power interface 15 to supply power to the two battery cluster main control units 10, the first battery cluster BMU, and the second battery cluster BMU. The voltage conversion circuit includes a circuit breaker and an AC / DC conversion module connected in series, with the circuit breaker connected to the AC power interface.

[0019] The high-voltage main circuit includes a first battery cluster side circuit, a second battery cluster side circuit, and a circuit breaker 7. The first battery cluster side circuit is connected to the first battery cluster interface 1, and the second battery cluster side circuit is connected to the second battery cluster interface. Both the first and second battery cluster side circuits are connected to the energy storage converter interface 2 through the circuit breaker 7. Specifically, both the first and second battery cluster circuits include a positive branch and a negative branch. The positive branch includes a fuse 3 and a main positive relay 4 connected in series. A pre-charge branch is connected in parallel across the main positive relay 4. The pre-charge branch includes a pre-charge resistor 6 and a pre-charge relay 5 connected in series. The negative branch includes a shunt 8 and a main negative relay 9 connected in series. The main positive relay, the main negative relay, and the prediction relay are all controlled by the battery cluster main control unit and powered by the voltage conversion circuit.

[0020] In this embodiment, the detection terminals of the two battery cluster main control units are respectively connected to the first battery cluster side circuit and the second battery cluster side circuit. The detection terminals of the battery cluster main control units include a current detection terminal, a voltage detection terminal, and an insulation detection terminal. The positive and negative terminals of the current detection terminal are respectively connected to the two ends of the shunt, the positive and negative terminals of the voltage detection terminal are respectively connected to the positive and negative terminals of the battery cluster, and the insulation detection terminal is connected to the chassis.

[0021] The first communication terminal of the battery cluster master control unit is a CAN interface. The battery cluster master control unit communicates with the battery cluster BMU through the CAN interface. The second communication terminal of the battery cluster master control unit includes a CAN interface and a 485 interface. The second communication terminals of the two battery cluster master control units are connected to each other. The battery cluster master control unit communicates with the battery cluster EMS through the CAN interface and with the energy storage converter through the 485 interface.

[0022] In this embodiment, the dual-battery cluster combined high-voltage box directly connects the positive and negative circuits of the two battery clusters in parallel inside the high-voltage box, and then connects to external charging and discharging equipment through a circuit breaker. This results in higher integration of the dual battery clusters, convenient control, and suitability for distributed battery energy storage systems. Each battery cluster is equipped with a corresponding battery cluster master control unit, which can collect and control data from both battery clusters separately. In addition, a main controller unit (BAMS) is provided, which is connected to both battery cluster master control units and accesses the network via a LAN interface, enabling remote data collection and control of the high-voltage box.

[0023] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A dual-battery cluster combined high-voltage box for power management of a first battery cluster and a second battery cluster, characterized in that: The device includes a housing containing a high-voltage main circuit, two battery cluster main control units, and a voltage conversion circuit. The side wall of the housing is equipped with a first battery cluster interface, a second battery cluster interface, an energy storage converter interface, a first battery cluster BMU interface, a second battery cluster BMU interface, a first battery cluster communication interface, a second battery cluster communication interface, and an AC power interface. The high-voltage main circuit is connected to the first battery cluster interface, the second battery cluster interface, and the energy storage converter interface. The detection terminals of the two battery cluster main control units are connected to the high-voltage main circuit. The first communication terminals of the two battery cluster main control units are connected to the first and second battery cluster BMU interfaces, respectively. The second communication terminals of the two battery cluster main control units are connected to the first and second battery cluster interfaces, respectively. The voltage conversion circuit is connected to the AC power interface to supply power to the two battery cluster main control units, the first battery cluster BMU, and the second battery cluster BMU.

2. The dual-cell cluster combined high-voltage box according to claim 1, characterized in that: The high-voltage main circuit includes a first battery cluster side circuit, a second battery cluster side circuit, and a circuit breaker. The first battery cluster side circuit is connected to the first battery cluster interface, and the second battery cluster side circuit is connected to the second battery cluster interface. Both the first battery cluster side circuit and the second battery cluster side circuit are connected to the energy storage converter interface through the circuit breaker.

3. The dual-cell cluster combined high-voltage box according to claim 2, characterized in that: Both the first battery cluster circuit and the second battery cluster circuit include a positive branch and a negative branch. The positive branch includes a fuse and a main positive relay connected in series, and a pre-charge branch is connected in parallel across the two ends of the main positive relay. The negative branch includes a shunt and a main negative relay connected in series, and the main positive relay and the main negative relay are controlled by the battery cluster main control unit.

4. The dual-cell cluster combined high-voltage box according to claim 3, characterized in that: The pre-charge branch includes a pre-charge resistor and a pre-charge relay connected in series, and the pre-charge relay is controlled by the battery cluster main control unit.

5. The dual-cell cluster combined high-voltage box according to claim 2, characterized in that: The detection terminals of the two battery cluster main control units are respectively connected to the first battery cluster side circuit and the second battery cluster side circuit. The detection terminals of the battery cluster main control units include a current detection terminal, a voltage detection terminal and an insulation detection terminal.

6. The dual-cell cluster combined high-voltage box according to claim 1, characterized in that: The first communication terminal of the battery cluster main control unit is a CAN interface.

7. The dual-cell cluster combined high-voltage box according to claim 1, characterized in that: The second communication terminal of the battery cluster main control unit includes a CAN interface and a 485 interface, and the second communication terminals of the two battery cluster main control units are connected to each other.

8. The dual-cell cluster combined high-voltage box according to claim 1, characterized in that: The voltage conversion circuit includes a circuit breaker and an AC / DC conversion module connected in series, and the circuit breaker is connected to an AC power interface.

Images