Energy storage system two-in-one high-voltage box and energy storage equipment

Abstract

The utility model belongs to the technical field of battery energy storage, and particularly relates to a two-in-one high-voltage box of an energy storage system and energy storage equipment. The total positive relay is connected with the input positive ends of the two battery clusters at the same time, and the total positive relay is connected with the input positive ends of the two PCSs at the same time; the total negative relay is connected with the input negative ends of the two battery clusters at the same time, and the total negative relay is connected with the input negative ends of the two PCSs at the same time; the battery clusters are connected with the input positive end and the input negative end corresponding to the same PCS; two high-voltage boxes are combined into one high-voltage box, the space, occupied by the high-voltage box, of a container is reduced, the relays in the high-voltage box are integrated, two lines share the same relay, cost is reduced, and compared with an original structure, the high-voltage box is more convenient to mount, dismount and replace.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery energy storage, and specifically relates to a two-in-one high-voltage box and energy storage equipment of an energy storage system. Background Art

[0002] At present, battery energy storage technology is widely used in various links such as power generation, transmission, distribution, and power consumption, and is also used in various fields such as frequency regulation, peak regulation, microgrids, and user-side energy storage. The main function of the high-voltage box of the energy storage battery system is to control the connection or disconnection of the main electrical circuit of the battery system, realize pre-charging, charging and discharging according to demand, and monitor the status of battery voltage, current, switches, contactors, etc. in real time. The existing high-voltage box has main positive contactors, main negative contactors, pre-charging contactors, pre-charging resistors, etc.

[0003] The energy storage battery high-voltage box is a device used to store electrical energy. Its working principle is to convert electrical energy into chemical energy, and then convert chemical energy into electrical energy output when needed. The main components of the energy storage battery high-voltage box include battery packs, control systems, battery management systems, etc. At present, each cluster of the energy storage system needs to be equipped with a high-voltage box. The size of the energy storage battery high-voltage box needs to match the energy storage battery pack, occupying a larger space in the container. The installation, maintenance and maintenance operations of the high-voltage box also need to be considered so that operators can complete related work conveniently and effectively.

[0004] Therefore, based on the technical problem that each battery cluster needs to correspond to a high-voltage box, which takes up a lot of space and makes maintenance difficult, it is necessary to design a new energy storage system with a two-in-one high-voltage box and energy storage equipment. Utility Model Content

[0005] The purpose of the utility model is to provide a two-in-one high-voltage box and energy storage equipment for an energy storage system to solve the above technical problems.

[0006] In order to solve the above technical problems, the utility model provides a two-in-one high-voltage box for an energy storage system, comprising:

[0007] Total positive relay and total negative relay;

[0008] The total positive relay is connected to the positive input terminals of two battery clusters at the same time, and the total positive relay is connected to the positive input terminals of two PCSs at the same time;

[0009] The total negative relay is connected to the input negative terminals of two battery clusters at the same time, and the total negative relay is connected to the input negative terminals of two PCSs at the same time;

[0010] The battery cluster is connected to the corresponding positive input terminal and negative input terminal of the same PCS.

[0011] Furthermore, fuses are connected between the main positive relay and the input positive terminals of the two battery clusters.

[0012] Furthermore, fuses are connected between the total negative relay and the input negative terminals of the two battery clusters.

[0013] Furthermore, the input positive terminal and the input negative terminal of the same PCS are connected to the same circuit breaker, and the circuit breaker is connected to both the total negative relay and the total positive relay.

[0014] Furthermore, the total positive relay and the total negative relay are arranged in the box.

[0015] Furthermore, connectors corresponding to the positive input terminal of the battery cluster, the negative input terminal of the battery cluster, the positive input terminal of the PCS, and the negative input terminal of the PCS are arranged on the surface of the box.

[0016] Furthermore, a pre-charging resistor is connected between the two ends of the total positive relay.

[0017] Furthermore, a pre-charging relay is connected between the two ends of the total positive relay, and the pre-charging relay is connected to the pre-charging resistor.

[0018] On the other hand, the utility model also provides an energy storage device using the above-mentioned two-in-one high-voltage box of the energy storage system, comprising:

[0019] at least one battery pack, and a high-voltage box corresponding to the battery pack;

[0020] The two battery clusters in the battery pack are connected to the same high-voltage box.

[0021] Furthermore, the high voltage box is arranged below the battery pack.

[0022] The beneficial effects of the utility model are as follows: the utility model uses a total positive relay and a total negative relay; the total positive relay is connected to the input positive terminals of two battery clusters at the same time, and the total positive relay is connected to the input positive terminals of two PCSs at the same time; the total negative relay is connected to the input negative terminals of two battery clusters at the same time, and the total negative relay is connected to the input negative terminals of two PCSs at the same time; the battery clusters are connected to the input positive terminal and input negative terminal corresponding to the same PCS; the two high-voltage boxes are combined into one high-voltage box, reducing the space occupied by the high-voltage box in the container, and the relays in the high-voltage box are combined into two-in-one, and the two lines share the same relay, which reduces the cost and is easier to install, disassemble and replace than the original structure.

[0023] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a circuit diagram of a two-in-one high-voltage box of an energy storage system of the utility model;

[0027] Figure 2 yes Figure 1 A magnified schematic diagram of part A;

[0028] Figure 3 yes Figure 1 A magnified schematic diagram of part B;

[0029] Figure 4 yes Figure 1 A magnified schematic diagram of part C;

[0030] Figure 5 yes Figure 1 The enlarged schematic diagram of the D part;

[0031] Figure 6 It is a structural schematic diagram of the energy storage device of the utility model.

[0032] In the figure:

[0033] 1 battery cluster, 2 high voltage box. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] like Figures 1 to 6As shown, in at least one embodiment, a two-in-one high-voltage box 2 of an energy storage system is provided, including: a total positive relay and a total negative relay; the total positive relay is simultaneously connected to the input positive terminals of two battery clusters 1, and the total positive relay is simultaneously connected to the input positive terminals of two PCSs; the total negative relay is simultaneously connected to the input negative terminals of two battery clusters 1, and the total negative relay is simultaneously connected to the input negative terminals of two PCSs; the battery cluster 1 is connected to the input positive terminal and input negative terminal corresponding to the same PCS; the two high-voltage boxes 2 are combined into one high-voltage box 2, reducing the space occupied by the high-voltage box 2 in the container, and the relays in the high-voltage box 2 are combined into one, and the two lines share the same relay, which reduces the cost and is easier to install, disassemble and replace than the original structure, reducing the design cost, reducing the design difficulty, and making the installation more convenient; the high-voltage box 2 is more convenient to maintain, and the high-voltage boxes 2 corresponding to the two battery clusters 1 can be repaired in an emergency, reducing the maintenance and repair time

[0036] The two high-voltage boxes 2 corresponding to the two battery clusters 1 are combined into one, that is, the two battery clusters 1 share one high-voltage box 2, the internal layout is more compact, the volume of the high-voltage box 2 and the floor space of the high-voltage box 2 are reduced, and the high-voltage boxes 2 of the two battery clusters 1 can be repaired at the same time during maintenance, which provides convenience for the maintenance of the high-voltage box 2 and reduces the maintenance time. In the original circuit, each main positive circuit and each main negative circuit are controlled by a main positive contactor and a main negative contactor respectively. The two main positive circuits share one main positive contactor, that is, the total positive relay, and the two main negative circuits share one main negative contactor, that is, the total negative relay, which saves space inside the high-voltage box 2, reduces costs, and is more convenient to install.

[0037] Normally, each battery cluster of the battery energy storage system is equipped with a high-voltage box 2. This solution occupies a large space in the container, and during maintenance, the high-voltage boxes 2 need to be pulled out one by one for maintenance. This workload is large and cumbersome. Now the two high-voltage boxes 2 are combined into one, and the baffles in the middle of the two high-voltage boxes 2 are removed to form a large high-voltage box 2. The lateral space inside the high-voltage box 2 is fully utilized and installed directly below the two battery clusters 1. When repairing the first cluster or the second cluster, only one high-voltage box 2 needs to be pulled out, which reduces the tediousness of maintenance, shortens the maintenance time, and reduces the production cost. The arrangement of the components inside the two-in-one high-voltage box 2 is still smaller than that of a single high-voltage box 2 under the condition of meeting the creepage distance and electrical clearance, which greatly reduces the footprint. In the original circuit, each main positive circuit and each main negative circuit are controlled by a main positive contactor and a main negative contactor, respectively.

[0038] A fuse is connected between the total positive relay and the input positive terminals of the two battery clusters 1; a fuse is connected between the total negative relay and the input negative terminals of the two battery clusters 1; the input positive terminal and the input negative terminal of the same PCS are connected to the same circuit breaker, and the circuit breaker is connected to both the total negative relay and the total positive relay; the two main positive circuits of the two battery clusters 1 originally share a total positive relay, and the two main negative circuits share a main negative relay; specifically, P1+ in the first circuit is connected to the first end of QF1, the second end of QF1 is connected to A2 of the total positive relay, A1 of the total positive relay is connected to the first end of FU1, and the second end of FU1 is connected to B1 +; P1- in the second circuit is connected to the third end of QF1, the fourth end of QF1 is connected to A2 of the total negative relay, A1 of the total negative relay is connected to the first end of FU2, and the second end of FU2 is connected to B1-; P2+ in the third circuit is connected to the first end of QF2, the second end of QF2 is connected to A2 of the total positive relay, A1 of the total positive relay is connected to the first end of FU3, and the second end of FU3 is connected to B2+; P2- in the fourth circuit is connected to the third end of QF2, the fourth end of QF2 is connected to A2 of the total negative relay, A1 of the total negative relay is connected to the first end of FU4, and the second end of FU4 is connected to B2-. The layout space inside the high-voltage box 2 is saved, the cost is reduced, and the installation time is greatly saved when the assembly line is installed. QF: circuit breaker, FU: fuse, B+: positive input terminal of battery cluster 1, B-: negative input terminal of battery cluster 1, P+: positive input terminal of PCS, P-: negative input terminal of PCS; the two main positive circuits share one main positive contactor, i.e., the total positive relay, and the two main negative circuits share one main negative contactor, i.e., the total negative relay, which saves space inside the high-voltage box 2, reduces costs, and is more convenient for installation.

[0039] The total positive relay and the total negative relay are arranged in the box body; an upper cover is arranged on the top surface of the box body, and the box body can be opened through the upper cover, so as to facilitate the maintenance and repair of the circuit in the box body; the box body and the upper cover are connected together by bolts to achieve a tight connection. Combined with the sealing effect of the sealing gasket, there is a good waterproof and dustproof sealing effect between the box body and the upper cover. A multi-layer partition is arranged in the high-voltage box 2 to separate the upper and lower spaces of the high-voltage box 2 into multiple areas, which makes full use of the longitudinal space inside the high-voltage box 2, facilitates the arrangement of high-voltage components, has the advantages of clear structure and easy use, and solves the problem of electrical insulation.

[0040] Connectors corresponding to the positive input terminal of the battery cluster 1, the negative input terminal of the battery cluster 1, the positive input terminal of the PCS and the negative input terminal of the PCS are arranged on the surface of the box, so as to facilitate connecting the battery cluster 1 and the PCS through the corresponding connectors.

[0041] A pre-charging resistor is connected between the two ends of the total positive relay; a pre-charging relay is connected between the two ends of the total positive relay, and the pre-charging relay is connected to the pre-charging resistor to realize the pre-charging function.

[0042] In at least one other embodiment, there is also provided an energy storage device using the two-in-one high-voltage box 2 of the energy storage system, comprising: at least one battery pack, and a high-voltage box 2 corresponding to the battery pack; two battery clusters 1 in the battery pack are connected to the same high-voltage box 2. The high-voltage box 2 is arranged below the battery pack, so that the high-voltage box 2 can be pulled out for maintenance.

[0043] In summary, the utility model uses a total positive relay and a total negative relay; the total positive relay is simultaneously connected to the input positive terminals of two battery clusters 1, and the total positive relay is simultaneously connected to the input positive terminals of two PCSs; the total negative relay is simultaneously connected to the input negative terminals of two battery clusters 1, and the total negative relay is simultaneously connected to the input negative terminals of two PCSs; the battery cluster 1 is connected to the input positive terminal and input negative terminal corresponding to the same PCS; the two high-voltage boxes 2 are combined into one high-voltage box 2, reducing the space occupied by the high-voltage box 2 in the container, and the relays in the high-voltage box 2 are combined into two-in-one, and the two lines share the same relay, which reduces the cost and is easier to install, disassemble and replace than the original structure.

[0044] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0045] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0046] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0047] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A two-in-one high-voltage box for an energy storage system, characterized in that: include: Total positive relay and total negative relay; The total positive relay is connected to the positive input terminals of two battery clusters at the same time, and the total positive relay is connected to the positive input terminals of two PCSs at the same time; The total negative relay is connected to the input negative terminals of two battery clusters at the same time, and the total negative relay is connected to the input negative terminals of two PCSs at the same time; The battery cluster is connected to the corresponding positive input terminal and negative input terminal of the same PCS.

2. The two-in-one high-voltage box of the energy storage system according to claim 1, characterized in that: Fuses are connected between the total positive relay and the input positive terminals of the two battery clusters.

3. The two-in-one high-voltage box of the energy storage system according to claim 1, characterized in that: Fuses are connected between the total negative relay and the input negative terminals of the two battery clusters.

4. The two-in-one high-voltage box of the energy storage system according to claim 1, characterized in that: The input positive terminal and the input negative terminal of the same PCS are connected to the same circuit breaker, and the circuit breaker is connected to both the total negative relay and the total positive relay.

5. The two-in-one high-voltage box of the energy storage system according to claim 1, characterized in that: The total positive relay and the total negative relay are arranged in the box.

6. The two-in-one high-voltage box of the energy storage system according to claim 5, characterized in that: Connectors corresponding to the positive input terminal of the battery cluster, the negative input terminal of the battery cluster, the positive input terminal of the PCS and the negative input terminal of the PCS are arranged on the surface of the box.

7. The two-in-one high-voltage box of the energy storage system according to claim 1, characterized in that: A pre-charging resistor is connected between the two ends of the total positive relay.

8. The two-in-one high-voltage box of the energy storage system according to claim 7, characterized in that: A pre-charging relay is connected between the two ends of the total positive relay, and the pre-charging relay is connected to the pre-charging resistor.

9. An energy storage device using a two-in-one high-voltage box of the energy storage system according to any one of claims 1 to 8, characterized in that: include: at least one battery pack, and a high-voltage box corresponding to the battery pack; The two battery clusters in the battery pack are connected to the same high-voltage box.

10. The energy storage device according to claim 9, characterized in that: The high voltage box is arranged below the battery pack.

Images