Two-way integrated high-voltage box suitable for energy storage outdoor cabinet

Abstract

The utility model discloses a two-way integrated high-voltage box suitable for an energy storage outdoor cabinet, which comprises a box body, two battery circuit structures are arranged in the box body, an intermediate relay, an AC / DC converter and a battery management unit are further arranged in the box body, and each battery circuit structure comprises a fuse, a main positive relay, a shunt, a main negative relay and a circuit breaker. According to the technical scheme provided by the utility model, the design scheme that two paths of integrated high-voltage boxes adopt two-cluster battery pack input and one path of current output after confluence is adopted is adopted, so that on the premise of meeting basic function requirements, charge and discharge control is provided for battery clusters, information such as voltage and temperature of batteries in the battery clusters is acquired and real-time communication is carried out; the functions of high-voltage sampling and low-voltage control are achieved, operation of a high-voltage system is protected and monitored, the two-way integrated high-voltage box is beneficial to saving space, and the area unit energy density of the energy storage outdoor cabinet is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of integrated high-voltage boxes, and in particular to a two-way integrated high-voltage box suitable for an outdoor energy storage cabinet. Background Art

[0002] In the existing technology, the high-voltage box of the outdoor energy storage cabinet basically only collects signals and controls high and low voltages for a single cluster of batteries, and is unable to collect and control signals for multiple clusters of batteries; multiple clusters of batteries require a high-voltage box for each cluster to collect and control signals, and a junction cabinet is used for junction after the output of each high-voltage box, which takes up a large space, is cumbersome to operate, and is costly. Utility Model Content

[0003] Technical problems to be solved by utility models

[0004] The technical problem to be solved by the utility model is to provide a two-way integrated high-voltage box suitable for an outdoor energy storage cabinet, which solves the problem that the existing outdoor energy storage cabinet only controls and outputs a single cluster of batteries.

[0005] Technical Solution

[0006] In order to solve the above problems, the technical solution provided by the present invention is as follows:

[0007] A two-way integrated high-voltage box suitable for outdoor energy storage cabinets includes a box body, two battery circuit structures are arranged inside the box body, an intermediate relay, an AC-DC converter, a battery cluster management unit, and a battery management unit are also arranged inside the box body.

[0008] Furthermore, the battery circuit structure includes a fuse, a main positive relay, a shunt, a main negative relay and a circuit breaker.

[0009] Furthermore, the fuse and the main positive relay are installed on one copper busbar, the shunt and the main negative relay are installed on another copper busbar, the copper busbar on which the fuse and the main positive relay are installed, the other copper busbar on which the shunt and the main negative relay are installed, and one end of the circuit breaker is installed and fixed on the box, and the other end is connected in parallel and connected to the isolating switch.

[0010] Furthermore, a pre-charge relay and a pre-charge resistor are provided in the box corresponding to each battery circuit structure. The pre-charge relay is connected in series with the pre-charge resistor and is electrically connected to the battery circuit of each cluster.

[0011] Furthermore, the intermediate relay is electrically connected to the circuit breaker in each battery circuit structure.

[0012] Furthermore, the battery management unit is electrically connected to the battery cluster management unit.

[0013] Furthermore, the box body is composed of a panel, side panels, a floor and a cover panel.

[0014] Furthermore, the box body is provided with a panel connector, and the panel connector includes a high and low voltage connector, an isolating switch, a signal indicator light, and a handle.

[0015] Beneficial effects

[0016] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0017] This utility model provides a two-way integrated high-voltage box design that uses two battery clusters for input and a single current output after converging. While meeting basic functional requirements, it provides charge and discharge control for the battery cluster, collects information such as voltage and temperature within the battery cluster, and communicates in real time. This enables high-voltage sampling and low-voltage control, protecting and monitoring the operation of the high-voltage system. The two-way integrated high-voltage box saves space and improves the energy density per unit area of ​​the outdoor energy storage cabinet. Furthermore, the two-way integrated high-voltage box simplifies its design, eliminates ancillary equipment such as a combiner cabinet, reduces costs, and facilitates operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the internal layout diagram of the two-way integrated high-voltage box proposed in the embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the two-way integrated high-voltage box proposed in an embodiment of the utility model. DETAILED DESCRIPTION

[0020] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0021] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are intended solely to illustrate the relevant utility model and are not intended to limit the utility model. It should also be noted that, for ease of description, only the relevant portions of the utility model are shown in the accompanying drawings. Terms such as "first," "second," and so on, used in the present utility model are provided for the convenience of describing the technical solution of the present utility model and do not have a specific limiting effect. They are general references and do not constitute a limitation on the technical solution of the present utility model. It should be noted that, unless conflicting, the embodiments and features within the embodiments of the present application may be combined with one another. In the description of the present utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or locations, are based on the positions or locations shown in the accompanying drawings and are intended solely to facilitate the description of the present utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contain contradictions or conflicts, and all of these are within the scope of protection claimed by this utility model.

[0022] Example

[0023] Combined with attachment Figure 1-2 , a two-way integrated high-voltage box suitable for outdoor energy storage cabinets. The two-way integrated high-voltage box is suitable for outdoor energy storage cabinets and can meet the integration requirements of two battery group current inputs and one current output.

[0024] It includes a box 13, in which are arranged a fuse 1, a shunt 2, a main positive relay 3, a main negative relay 4, a pre-charge relay 5, a pre-charge resistor 6, a circuit breaker 7, an intermediate relay 8, an AC-DC converter 9, a battery cluster management unit 10, an isolating switch 11, a copper bus 12, a panel connector 14, and a battery management unit 15.

[0025] The fuse 1 forms a battery circuit structure with the shunt 2, main positive relay 3, main negative relay 4 and circuit breaker 7. The above components are connected through an internal high-voltage line. The copper busbar 11 directly serves as a carrier of the internal high-voltage line, and the above components are connected through the copper busbar 11.

[0026] The circuit structure of each battery cluster is the same. The fuse 1 and the main positive relay 3 are installed on one copper busbar, and the shunt 2 and the main negative relay 4 are installed on another copper busbar. The copper busbar on which the fuse 1 and the main positive relay 3 are installed, the other copper busbar on which the shunt 2 and the main negative relay 4 are installed, and one end of the circuit breaker 7 is fixed to the box 13, and the other end is connected in parallel to the isolating switch 11.

[0027] The above two battery cluster circuit structures have exactly the same structural composition, and the functions of the components in the battery circuit structure are also the same.

[0028] The fuse 1 is a current protector on the input side of each battery pack in the two-way integrated high-voltage box.

[0029] The shunt 2 is a low-resistance resistor for detecting current at the input side of each battery pack in the two-way integrated high-voltage box.

[0030] The main positive relay 3 and the main negative relay 4 are the positive and negative electrode protection and control elements on the input side of each battery pack of the two integrated high-voltage boxes, and they work after the two copper bars are connected in parallel.

[0031] The circuit breaker 7 is a switch device for closing, carrying and breaking the loop current on the input side of each battery group of the two-way integrated high-voltage box.

[0032] Each cluster of battery circuit structures is provided with a corresponding pre-charging relay 5 and a pre-charging resistor 6. The corresponding pre-charging relay 5 is connected in series with the pre-charging resistor 6 and is electrically connected to the corresponding battery circuit structure. The pre-charging relay 5 and the pre-charging resistor 6 constitute a protection circuit on the input side of each cluster of battery packs in the two-way integrated high-voltage box. When the voltage difference between the two sides exceeds the set value, the control is started and the voltage difference is adjusted to a normal range.

[0033] The intermediate relay 8 is electrically connected to the circuit breakers 7 in the two battery cluster circuit structures respectively. The intermediate relay 8 is a control element that controls the on and off of the two circuit breakers 7 simultaneously through signal transmission.

[0034] The box 13 is connected to high voltage electricity. In daily life, the electricity used is 220V AC, so the box 13 is connected to 220V AC in most cases. Since some components in the box 13 require DC input, an AC-DC converter 9 is provided in the box 13.

[0035] The AC-DC converter 9 is an AC-DC converter that converts the 220V AC power input from the high-voltage box into a 24V DC power supply. The AC-DC converter 9 is electrically connected to the circuit breaker 7, the intermediate relay 8, the battery cluster management unit 10, and the battery management unit 15, and provides 24V power input for the above components.

[0036] The battery cluster management unit 10 is a battery cluster management unit. The battery cluster management unit 10 equipped with the two-way integrated high-voltage box can be divided into a main board battery cluster management unit and a slave board battery cluster management unit. The main board or slave board battery cluster management unit 10 has the same function in its corresponding battery circuit structure. Each battery cluster management unit 10 controls the communication of a cluster of battery packs and the voltage, current, temperature acquisition and high and low voltage control of one input side in the high-voltage box. During installation, the main board battery cluster management unit and the slave board battery cluster management unit can be installed as an integrated structure or as a separate structure with electrical connection. Figure 1 The main board battery cluster management unit and the slave board battery cluster management unit are directly abutted and electrically connected together.

[0037] Compared with the slave board battery cluster management unit, the main board battery cluster management unit also needs to control the circuit breaker 7, the main negative relay 4, the pre-charge relay 5, and the intermediate relay 8. The main board battery cluster management unit can also communicate with the slave board battery cluster management unit and the high-voltage box.

[0038] The battery management unit 15 is a battery management unit and is electrically connected to the mainboard battery cluster management unit 101 . The battery management unit 15 collects voltage and temperature signals of the battery pack and communicates with the battery cluster management unit 10 .

[0039] The isolating switch 11 is a switch device for isolating, connecting, and cutting off the power supply at the output side of the two integrated high-voltage boxes. Both battery cluster circuit structures need to be electrically connected to the isolating switch 11.

[0040] The box body 13 is a high-voltage box outer shell, including a panel, side panels, a bottom plate and a cover plate.

[0041] The panel connector 14 includes high and low voltage connectors, an isolating switch, a signal indicator light, a handle, etc.

[0042] Figure 2 This is a schematic diagram of a two-way integrated high-voltage box suitable for an outdoor energy storage cabinet in this application.

[0043] After the high-voltage current of the two battery packs is input into the two integrated high-voltage boxes, it passes through the overcurrent protection of the fuse 1, the current detection of the shunt 2, the main positive relay 3 and the main negative relay 4, as well as the pre-charge relay 5 and the pre-charge resistor 6 that form the pre-charge circuit. The convergence is completed after the circuit breaker 7 is closed or opened, and the output side is connected to the power supply through the isolation switch 11 and then output to the PCS equipment in a single channel.

[0044] After the low-voltage signals of the two battery packs are input into the two integrated high-voltage boxes, they are collected and communicated via the main BCMU 101 (BCMUMASTER) and the slave BCMU 102 (BCMU SLAVE). Each BCMU 10 controls the communication of one battery pack and the voltage, current, temperature collection and high and low voltage control on one input side of the high-voltage box. The main BCMU 101 controls the circuit breaker 7 and relays 4 / 5 / 8. The main BCMU 101 can communicate with the slave BCMU 102 and the high-voltage box to the outside. The ACDC 9 converts the 220V AC power input from the outside of the high-voltage box into a 24V DC power supply. The ACDC 9 provides 24V power input for the circuit breaker 7, the intermediate relay 8, the BCMU 10, and the BMU 15.

[0045] This patent uses a two-way integrated high-voltage box, which is suitable for outdoor energy storage cabinets with two battery groups, meeting the signal collection and high and low voltage control requirements of the two battery clusters; the two-way integrated high-voltage box completes the integration of two currents inside, and after the convergence is completed, it directly outputs a single channel to the PCS, and no longer needs to go through the convergence processing of equipment such as the convergence cabinet.

[0046] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A two-way integrated high-voltage box suitable for outdoor energy storage cabinets, including a box body, characterized in that: There are two battery cluster circuit structures in the box, as well as an intermediate relay, an AC-DC converter, a battery cluster management unit, and a battery management unit. The battery circuit structure includes a fuse, a main positive relay, a shunt, a main negative relay and a circuit breaker; The fuse and the main positive relay are installed on one copper busbar, the shunt and the main negative relay are installed on another copper busbar, the copper busbar on which the fuse and the main positive relay are installed, the copper busbar on which the shunt and the main negative relay are installed, and one end of the circuit breaker is fixed to the box, and the other end is connected in parallel to the isolating switch; A pre-charge relay and a pre-charge resistor are provided in the box corresponding to each battery circuit structure. The pre-charge relay is connected in series with the pre-charge resistor and is electrically connected to the battery circuit of each cluster.

2. A two-way integrated high-voltage box suitable for an outdoor energy storage cabinet according to claim 1, characterized in that: The intermediate relay is electrically connected to the circuit breaker in each cluster of the battery circuit structure.

3. The two-way integrated high-voltage box suitable for an outdoor energy storage cabinet according to claim 1, characterized in that: The battery management unit is electrically connected to the battery cluster management unit.

4. The two-way integrated high-voltage box suitable for an outdoor energy storage cabinet according to claim 1, characterized in that: The box body consists of a panel, side panels, a floor and a cover.

5. The two-way integrated high-voltage box suitable for an outdoor energy storage cabinet according to claim 1, characterized in that: The box body is provided with a panel connector, which includes a high and low voltage connector, an isolating switch, a signal indicator light, and a handle.

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