Energy storage master control box and energy storage box

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to an energy storage master control box and an energy storage box, which comprise a box body with an accommodating space formed inside and a master control circuit accommodated in the accommodating space, the branch control circuit is connected to the main control circuit in parallel, the fusing unit is connected to the branch control circuit, the lightning protection unit is installed in the containing space and electrically connected to the fusing unit, and the lightning protection unit is configured to clamp transient overvoltage of the main control circuit within a safety range and is grounded through a cable. The fusing unit can be used as backup protection of the lightning protection unit, so that short circuit of a loop of the lightning protection unit is avoided, and damage to equipment caused by overvoltage, large current and the like during lightning can be effectively prevented; the insulation space gap and the wire climbing distance are ensured, the structure arrangement and the wiring harness wiring are easier, and the integration requirement of energy storage equipment can be met; the lightning protection unit is located on the main control panel, a visual window is exposed, detection and maintenance by workers are facilitated, and on-site working hours and manpower waste are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, in particular to an energy storage main control box and an energy storage box. Background Art

[0002] A surge protector, also called a lightning arrester, abbreviated as SPD in English, is an electronic device that provides safety protection for various electronic equipment, instruments and meters, and communication lines. When a spike current or voltage suddenly occurs in an electrical circuit or communication line due to external interference, the surge protector can conduct and shunt in a very short time, thereby preventing the surge from damaging other equipment in the circuit.

[0003] In energy storage equipment, the installation of SPD is inevitable from the perspective of lightning protection design and overvoltage design; for single-cluster battery cabinets and other PCS battery containers that match module machines, SPDs are usually installed in electrical cabinets. With the development of the energy storage market, the battery capacity demand of battery containers is getting higher and higher, and the volume of the container occupied by the battery is also getting larger and larger. However, the size of the container needs to be strictly controlled within a 20-foot standard container, so the space left for the electrical cabinet is correspondingly reduced.

[0004] For PCS battery containers that match multiple module machines, when the lightning protector is installed in the electrical cabinet, the primary compartment space of the electrical cabinet needs to arrange multiple lightning protector fuses and lightning protectors, and also needs to take into account the copper bus wiring and primary inlet and outlet lines. Therefore, it is difficult to arrange all the string-type lightning protectors and their fuses in the electrical cabinet compartment, and the structural layout and wiring harness routing are relatively inconvenient, making it difficult to ensure the insulating air gap and creepage distance, and unable to meet the integration requirements of energy storage equipment. Utility Model Content

[0005] The utility model provides an energy storage main control box and an energy storage box, aiming to solve the technical problems that it is difficult to arrange all string-type lightning protectors and their fuses in existing electrical cabinets, the structural arrangement and wiring harness routing are inconvenient, and it is difficult to ensure the insulating air gap and creepage distance.

[0006] The utility model is implemented as follows: the energy storage main control box comprises: a box body with an accommodation space formed inside and a main control circuit accommodated in the accommodation space, and also comprises:

[0007] A sub-control circuit connected in parallel to the main control circuit;

[0008] A fuse unit connected to the sub-control circuit;

[0009] A lightning protection unit is installed in the accommodating space and electrically connected to the fuse unit, and is configured to clamp the transient overvoltage of the main control circuit within a safe range. The lightning protection unit is grounded through a cable.

[0010] Preferably, it also includes:

[0011] A main control panel is arranged outside the box body and has a through opening penetrating the accommodating space along the thickness direction;

[0012] The visible window is provided in the lightning protection unit and is configured to at least partially penetrate into the through opening and have an end surface exposed from the outside of the through opening.

[0013] Preferably, one side of the box body is provided with an opening, the main control panel covers the opening to form the accommodating space inside the box body, and the lightning protection unit is installed inside the main control panel.

[0014] Preferably, the lightning protection unit is fixedly connected to the main control panel, or the lightning protection unit is detachably connected to the main control panel.

[0015] Preferably, a crimping piece is provided on the outside of the lightning protection unit, and the crimping piece is provided with at least two crimping ends distributed on both sides of the lightning protection unit along the length direction and / or width direction of the lightning protection unit, each of the crimping ends is provided with a mounting hole, and a fastener for connecting to the main control panel is passed through the mounting hole.

[0016] Preferably, either the lightning protection unit or the main control panel is formed with a convex end, and the other of the lightning protection unit and the main control panel is formed with a concave end, and the connection between the lightning protection unit and the main control panel is achieved by inserting the convex end into the concave end.

[0017] Preferably, the lightning protection unit is configured as an SPD and is provided with a PE interface, and the PE interface is connected to the PE point of the box body through a cable.

[0018] Preferably, the fuse unit comprises:

[0019] A third fuse, a first end of which is connected to the sub-control circuit; a second end of which is connected to the first port of the lightning protection unit;

[0020] A fourth fuse, a first end of which is connected to the sub-control circuit; a second end of which is connected to the second port of the lightning protection unit;

[0021] The third fuse, the lightning protection unit and the fourth fuse are connected to the sub-control circuit in sequence.

[0022] Preferably, the main control circuit includes: a contactor, a protection unit, a monitoring unit configured to monitor the battery status and parameters in real time, a DC-DC connector configured to connect to the outside world and perform voltage conversion, and at least two battery interfaces configured to connect to the power battery.

[0023] Preferably, the protection unit includes at least one or more of a fuse, a shunt, and a circuit breaker, and the monitoring unit includes at least two BMUs connected in series.

[0024] Preferably, the main control circuit includes: multiple BMUs connected in series, a first battery interface, a first fuse, a first contactor, a first circuit breaker, a DC-DC connector, a second fuse, a second circuit breaker, a second contactor, a shunt, and a second battery interface; the input end of the sub-control circuit is connected to the node between the first contactor and the first circuit breaker, and the output end is connected to the node between the second contactor and the second circuit breaker.

[0025] The utility model also provides an energy storage box, comprising: a box body, a battery cluster arranged on a battery rack of the box body, an electrical cabinet and the energy storage main control box as described above.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] 1. By setting the lightning protection unit inside the main control box, there is no need to install the lightning protection unit in the electrical cabinet, which reduces the space occupied in the electrical cabinet. In addition, by using the fuse unit and the lightning protection unit with grounding, when a transient overvoltage occurs in the circuit, the lightning protection unit is used to clamp the overvoltage within a safe range. The fuse unit can be used as a backup protection for the lightning protection unit to avoid short circuit of the lightning protection unit circuit, which can effectively prevent damage to the equipment caused by overvoltage and high current during lightning. By setting the lightning protection unit and the fuse unit inside the main control box, the remaining space in the electrical cabinet is larger, which can effectively ensure the insulation space gap and creeping distance, and make the structural arrangement and wiring harness routing easier. It can meet the integration requirements of energy storage equipment.

[0028] 2. The lightning protection unit is directly located on the main control panel and exposes the visible window, which is convenient for workers to observe and repair, reducing the waste of on-site working hours and manpower, and effectively improving the efficiency of later maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The electrical schematic diagram of the energy storage main control box provided by the utility model;

[0030] Figure 2 A three-dimensional structural diagram of the energy storage main control box provided by the utility model;

[0031] Figure 3 A three-dimensional structural diagram of the main control panel of the energy storage main control box provided by the utility model;

[0032] Figure 4 for Figure 3 A partial enlarged view of the middle part;

[0033] Figure 5 A partial view of the connection between the lightning protection unit and the main control panel of the energy storage main control box provided by the utility model.

[0034] In the attached drawings: 1 box body, 2 main control panel, 21 access port, 3 main control circuit, 4 sub-control circuit, 5 fuse unit, 6 lightning protection unit, 61 visual window, 7 crimping part. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0036] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0037] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0038] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0039] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0040] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0041] Referring to the prior art, in energy storage containers, SPDs are usually installed in electrical cabinets, which compresses the internal space of the electrical cabinets. When in use, SPDs need to be equipped with corresponding fuses so as to protect the circuits in case of overvoltage or overcurrent. With the need for integration of energy storage equipment, the space of electrical cabinets is gradually reduced. If SPDs and their accessories continue to be installed in electrical cabinets, it will bring more inconveniences.

[0042] Specifically, the size of the container needs to be strictly limited to a 20-foot standard container. Since the battery is as high as 5MWH, the volume of the battery in the container becomes larger, and the space of the electrical cabinet is correspondingly reduced; while meeting the secondary auxiliary power distribution, the space of the primary warehouse is also compressed. For a battery container that needs to match 12 module machine PCS, the primary warehouse needs to arrange 24 SPD fuses and 12 SPDs, and also needs to take into account the copper bus wiring and primary inlet and outlet lines. Therefore, wiring is difficult and it is difficult to ensure the insulation space gap and creepage distance. In actual operation, the complicated wiring will seriously waste workers' working hours and manpower, so the need for structural optimization of the electrical cabinet is very urgent.

[0043] In this embodiment, reference Figure 1 The electrical schematic diagram of the energy storage main control box provided by the utility model, Figure 2-Figure 5 The schematic diagram of the structure of the energy storage main control box provided by the utility model includes a box body 1 with an accommodating space formed inside and a main control circuit 3 accommodated in the accommodating space, and also includes: a sub-control circuit 4 connected in parallel to the main control circuit 3, a fuse unit 5 connected to the sub-control circuit 4, and a lightning protection unit 6 installed in the accommodating space and electrically connected to the fuse unit 5. The lightning protection unit 6 is configured to clamp the transient overvoltage of the main control circuit 3 within a safe range and ground it through a cable.

[0044] In actual application of this embodiment, the lightning protection unit 6 is arranged inside the main control box, and there is no need to install the lightning protection unit 6 in the electrical cabinet, so that the electrical cabinet can leave more space for installing other devices; in addition, by using the fuse unit 5 and the lightning protection unit 6 with a grounding setting, when a transient overvoltage occurs in the circuit, the overvoltage can be clamped within a safe range; and the fuse unit 5 can be used as a backup protection for the lightning protection unit 6 to avoid a short circuit in the lightning protection unit 6 circuit, thereby effectively preventing damage to the equipment caused by overvoltage, high current, etc. during lightning; the lightning protection unit 6 and the fuse unit 5 are arranged inside the main control box, and the remaining space in the compartment of the electrical cabinet is larger, which can effectively ensure the insulation space gap and the creeping distance, and the structural arrangement and wiring harness routing are easier, which can meet the integration requirements of the energy storage equipment.

[0045] In this embodiment, Figure 2 As shown, it also includes: a main control panel 2 arranged on the outside of the box body 1, and a visible window 61 arranged on the lightning protection unit 6, the main control panel 2 is provided with a through opening 21 that passes through the accommodating space along the thickness direction, and the visible window 61 is configured to at least partially penetrate the through opening 21 and the end face is exposed from the outside of the through opening 21.

[0046] It can be known that since the lightning protection unit 6 is provided with a visible window 61, the lightning protection unit 6 is installed in the accommodating space, and the visible window 61 is exposed only through the opening 21. The worker can observe the lightning protection unit 6 by opening the container door. Therefore, it is more convenient for maintenance workers to observe the failure condition of the lightning protection unit 6 and replace the lightning protection unit 6 in time, which effectively improves the efficiency of later maintenance personnel.

[0047] Furthermore, an opening is provided on one side of the box body 1 , and the main control panel 2 covers the opening to form an accommodating space inside the box body 1 , and the lightning protection unit 6 is installed on the inner side of the main control panel 2 .

[0048] In actual operation of this embodiment, since the lightning protection unit 6 is arranged on the main control panel 2 of the control box, and the main control panel 2 is located on the outside of the box body 1, the maintenance personnel only need to open the container door to realize the maintenance of the lightning protection unit 6, and observe the working condition of the lightning protection unit 6 more intuitively, with excellent visual effect, and no need to open the electrical cabinet door, on-site operation is more convenient, and the absence of complicated wiring harness wiring is also convenient for workers to perform maintenance, effectively ensuring the personal safety of maintenance workers.

[0049] In addition, the connection between the visible window 61 and the through-port 21 also makes the connection between the main control panel 2 and the lightning protection unit 6 tighter. The main body of the lightning protection unit 6 is built into the accommodating space of the box body 1, which can also ensure the stable operation of the lightning protection unit 6. The visible window 61 of the lightning protection unit 6 is placed in front of the main control panel 2 to facilitate observation of the status of the visible window 61. When the window is green, it indicates normal operation, and when the window is red, it indicates failure, so that timely maintenance and replacement can be carried out.

[0050] In one case of this embodiment, the visible window 61 is set as a square three-dimensional structure, and the opening is set as a square hole with a shape and size matching it, so that the visible window 61 is inserted into the opening, and the visible end face is exposed from the opening for easy observation and detection by personnel.

[0051] In another situation of this embodiment, not limited to this, the visible window 61 can also be other shapes, such as cylindrical, triangular prism, pentagonal prism, hexagonal prism, etc., and the shape of the opening can also be set at will; correspondingly, for example, the opening can be set to a circular hole, a triangular hole, a pentagonal hole, a hexagonal hole, etc., as long as the visible window 61 and the main control panel 2 can be connected for personnel to observe, this embodiment does not make specific limitations here.

[0052] It should be noted that in addition to using the main control panel 2 to construct the accommodating space of the box body 1, the main control panel 2 can also be directly fixed to the outer wall of the box body 1. In this case, the lightning protection unit 6 is fixed to the main control panel 2. Therefore, the specific structure of the box body 1 and the specific installation position of the lightning protection unit 6 are not restrictive provisions of this embodiment.

[0053] Furthermore, the lightning protection unit 6 is fixedly connected to the main control panel 2, or the lightning protection unit 6 is detachably connected to the main control panel 2. It is not difficult to see that the lightning protection unit 6 can be installed on the main control panel 2 by fixed connection or detachable connection. The built-in structure blocks the entry of foreign substances and effectively ensures the stable operation of its functions.

[0054] In one case of this embodiment, if Figure 5 As shown, a crimping piece 7 is provided on the outside of the lightning protection unit 6, and the crimping piece 7 is provided with at least two crimping ends distributed on both sides of the lightning protection unit 6 along the length direction and / or width direction of the lightning protection unit 6, and each crimping end is provided with a mounting hole, and a fastener for crimping on the inner wall of the main control panel 2 is passed through the mounting hole.

[0055] It can be known that, referring to Figure 5The lightning protection unit 6 is located on the inner side of the main control panel 2, and a crimping piece 7 is sleeved on the outside of the lightning protection unit 6, and crimping ends are arranged at both ends in the length or width direction, so that the crimping ends can be fixed to the main control panel 2 through fasteners, and then the lightning protection unit 6 sleeved therein is fixed on the inner side of the main control panel 2.

[0056] In this embodiment, when the crimping end and the main control panel 2 are connected by bolt connection, a threaded hole can be opened in one of the crimping end and the main control panel 2, and a light hole can be opened in the other, and the bolt is screwed into the threaded hole through the through hole to connect the crimping end to the main control panel 2; or light holes can be opened on both the crimping end and the main control panel 2, the bolt is passed through the light hole of the relatively set frame crimping end and the light hole of the main control panel 2, and then a nut is screwed into the bolt, and the crimping end is connected to the main control panel 2 by locking the bolt and the nut. The bolt connection method makes the connection stability between the crimping end and the main control panel 2 stronger.

[0057] In this embodiment, when the crimping end is connected to the main control panel 2 by magnetic connection, the mounting hole can also be a through hole, and the fastener is set as a magnetic member, so that the crimping end is magnetically attracted and fixed to the inner wall of the main control panel 2 by magnetism.

[0058] Exemplarily, the fastener may be a bolt or a screw; the crimping piece 7 may be a U-shaped plate, and two crimping ends are symmetrically provided at both ends along the width direction; the crimping piece 7 may also be a square crimping sleeve mounted on the outside of the lightning protection unit 6, and crimping ends are provided along the length, square and width directions of the lightning protection unit 6, so that the lightning protection unit 6 can be fixed to the inner wall of the main control panel 2 by utilizing the crimping ends at the four corners. Of course, the crimping piece 7 may also be other shapes, and this embodiment is not specifically limited here.

[0059] In another situation of this embodiment, a convex end is formed on either side of the lightning protection unit 6 and the main control panel 2, and a concave end is formed on the other side of the U-shaped fixing member and the main control panel 2. The connection between the lightning protection unit 6 and the main control panel 2 is achieved by inserting the convex end into the concave end.

[0060] Specifically, a convex end portion can be provided on the side of the lightning protection unit 6 close to the main control panel 2, and a concave end portion can be provided on the inner wall of the main control panel 2, so that the convex end portion is inserted into the concave end portion to achieve plug-in fixation of the two. Of course, a concave end portion can also be provided on the side of the lightning protection unit 6 close to the main control panel 2, and a convex end portion can be provided on the inner wall of the main control panel 2; both methods can achieve a detachable connection between the lightning protection unit 6 and the main control panel 2. Of course, the above-mentioned lightning protection unit 6 and the main control panel 2 can also be installed by welding, snap-fit ​​connection, etc., and the above-mentioned installation method of this embodiment is not a restrictive provision.

[0061] In an example of the present invention, the lightning protection unit 6 is configured as an SPD and is provided with a PE interface, and the PE interface is connected to the PE point of the box body 1 through a cable.

[0062] It is not difficult to see that by setting the lightning protection unit 6 as an SPD, the PE interface of the SPD can be used to connect the PE point of the box body 1 through a cable, so as to ground the lightning protection unit 6. By using the nonlinear elements inside the SPD, it will be in a high-impedance state under normal working conditions, and will not affect the power supply and signal.

[0063] In actual application of this embodiment, when a transient overvoltage occurs in the circuit, the nonlinear element of the SPD quickly changes to a low-resistance state, clamps the overvoltage within a certain safety range, and conducts the surge current to the ground through the cable, thereby effectively protecting the electrical equipment from damage; when the transient overvoltage disappears, the nonlinear element returns to a high-resistance state, allowing the circuit to resume normal operation, thereby achieving lightning protection for the entire equipment.

[0064] It should be noted that, in addition to the SPD, the lightning protection unit 6 may also be other overvoltage protection devices, so the specific implementation of the lightning protection unit 6 is not a restrictive provision of this embodiment.

[0065] In this embodiment, reference Figure 1 The fuse unit 5 includes: a third fuse whose first end is connected to the sub-control circuit 4 and whose second end is connected to the first port of the lightning protection unit 6, and a fourth fuse whose first end is connected to the sub-control circuit 4 and whose second end is connected to the second port of the lightning protection unit 6; the third fuse, the lightning protection unit 6, and the fourth fuse are connected to the sub-control circuit 4 in sequence.

[0066] Specifically, the third fuse and the fourth fuse can be used as backup protection for the lightning protection unit 6. When the lightning protection unit 6 fails or short-circuits, the two fuses can detect overcurrent and quickly disconnect the circuit, thereby avoiding a short circuit in the lightning protection unit 6.

[0067] In this embodiment, reference Figure 1 The main control circuit 3 includes: a contactor, a protection unit, a monitoring unit configured to monitor the battery status and parameters in real time, a DC-DC connector configured to connect to the outside and perform voltage conversion, and at least two battery interfaces configured to connect to the power battery.

[0068] It can be known that the power battery interface is used to connect to the battery, and the monitoring unit is used to monitor the battery status in real time. Specifically, the voltage of all single cells in the battery pack, the total current of the battery pack, the total voltage, the ambient temperature and other parameters can be detected in real time, while the DC-DC connector can be connected to the outside world to realize the charging and discharging of the battery; in addition, by setting a protection unit in the main control circuit 3, it is convenient to provide the battery cluster with overcurrent, overload and overvoltage protection and other functions.

[0069] In actual application, this embodiment can be powered by main power introduced into the main control box, and the main control panel 2 can be used for secondary power distribution to the components inside the box body 1, including but not limited to: insulation detection board, fan, current detection board, shunt release, contactor coil, and power supply to the distribution elements of the lower-level PACK, thereby realizing the secondary power distribution function.

[0070] In one case of this embodiment, the protection unit includes at least one or more of a fuse, a shunt, and a circuit breaker, and the monitoring unit includes at least two BMUs connected in series; the main control circuit 3 specifically includes: multiple BMUs connected in series, a first battery interface, a first fuse, a first contactor, a first circuit breaker, a DC-DC connector, a second fuse, a second circuit breaker, a second contactor, a shunt, and a second battery interface; the input end of the sub-control circuit 4 is connected to the node between the first contactor and the first circuit breaker, and the output end is connected to the node between the second contactor and the second circuit breaker.

[0071] It is not difficult to see that by using the BMU to monitor the battery connected to the main control panel 2, the battery charging and discharging process can be managed according to the status and demand to ensure that the battery operates under safe, efficient and long-life conditions; in addition, multiple fuses, circuit breakers, and shunts provided in the main control circuit can be combined with the lightning protection unit 6 to achieve a protection function, providing current flow, detection, overcurrent, overvoltage and overload protection for the battery cluster. The third fuse and the fourth fuse provided in the sub-control circuit 4 can also provide backup protection for the lightning protection unit 6 circuit, thereby disconnecting the circuit in the event of overcurrent to ensure the smooth operation of the lightning protection unit 6.

[0072] It should be noted that the protection units in the main control circuit include but are not limited to fuses, shunts, circuit breakers and other devices. Their specific number and connection method can be adjusted according to actual needs to meet the needs of circuit protection. This embodiment does not make specific limitations here.

[0073] In summary, the energy storage main control box in this embodiment can realize the integrated functions of primary protection + secondary power distribution + battery management and control, and integrate the lightning protection unit 6 into the main control panel 2, eliminating the step of opening the electrical cabinet door for inspection. Only the container door needs to be opened to observe the failure condition of the lightning protection unit 6 in real time, thereby improving the visibility of the lightning protection unit 6 and the convenience of on-site operation, and also effectively protecting the personal safety of workers and improving the work efficiency of later maintenance personnel. Therefore, it has strong practicality.

[0074] In the present embodiment, an energy storage box is also provided, comprising: a box body, a battery cluster arranged on a battery rack of the box body, an electrical cabinet, and the energy storage main control box as described above.

[0075] It can be known that by applying the above-mentioned energy storage main control box in the energy storage container, the lightning protection unit 6 is set on the main control panel 2 of the main control box. There is no need to install the above-mentioned lightning protection unit 6 in the electrical cabinet, which saves the space for electrical integration in the cabinet and makes the layout in the cabinet more concise and clear. It can effectively ensure the insulation space gap and creepage distance, and make it more convenient for workers to detect and maintain the electrical cabinet. The specific structure of the lightning protection unit 6 can be observed by opening the container door, thereby effectively reducing the difficulty of maintenance and meeting the integration requirements of energy storage equipment.

[0076] The energy storage main control box in the above embodiment of the present application can also be used in battery containers of large-capacity industrial and commercial energy storage battery packs. It can effectively ensure the electrical insulation design, overvoltage protection of the battery compartment, and simple wiring of the wiring harness without increasing the size of the container body. At the same time, on-site operation and subsequent maintenance are more convenient, and there are many application scenarios that can be adapted. Therefore, the actual application scenarios of the above energy storage main control box are not restrictive provisions of this embodiment.

[0077] The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. Energy storage main control box, including: A box body having an accommodation space formed therein and a main control circuit accommodated in the accommodation space, characterized in that it also includes: A sub-control circuit connected in parallel to the main control circuit; A fuse unit connected to the sub-control circuit; A lightning protection unit is installed in the accommodating space and electrically connected to the fuse unit, and is configured to clamp the transient overvoltage of the main control circuit within a safe range. The lightning protection unit is grounded through a cable.

2. The energy storage main control box according to claim 1, characterized in that: Also includes: A main control panel is arranged outside the box body and has a through opening penetrating the accommodating space along the thickness direction; The visible window is provided in the lightning protection unit and is configured to at least partially penetrate into the through opening and have an end surface exposed from the outside of the through opening.

3. The energy storage main control box according to claim 2, characterized in that: One side of the box body is provided with an opening, the main control panel covers the opening to form the accommodating space inside the box body, and the lightning protection unit is installed inside the main control panel.

4. The energy storage main control box according to claim 3 is characterized in that: The lightning protection unit is fixedly connected to the main control panel, or the lightning protection unit is detachably connected to the main control panel.

5. The energy storage main control box according to claim 4, characterized in that: The lightning protection unit is externally sleeved with a crimping piece, and the crimping piece is provided with at least two crimping ends distributed on both sides of the lightning protection unit along the length direction and / or width direction of the lightning protection unit, each of the crimping ends is provided with a mounting hole, and a fastener for connecting to the main control panel is passed through the mounting hole.

6. The energy storage main control box according to claim 4, characterized in that: Either one of the lightning protection unit and the main control panel is formed with a convex end, and the other one of the lightning protection unit and the main control panel is formed with a concave end, and the connection between the lightning protection unit and the main control panel is achieved by inserting the convex end into the concave end.

7. The energy storage main control box according to claim 1, characterized in that: The lightning protection unit is configured as an SPD and is provided with a PE interface, and the PE interface is connected to the PE point of the box body through a cable.

8. The energy storage main control box according to claim 1, characterized in that: The fuse unit comprises: A third fuse, a first end of which is connected to the sub-control circuit; a second end of which is connected to the first port of the lightning protection unit; A fourth fuse, a first end of which is connected to the sub-control circuit; a second end of which is connected to the second port of the lightning protection unit; The third fuse, the lightning protection unit and the fourth fuse are connected to the sub-control circuit in sequence.

9. The energy storage main control box according to any one of claims 1 to 8, characterized in that: The main control circuit includes: a contactor, a protection unit, a monitoring unit configured to monitor the battery status and parameters in real time, a DC-DC connector configured to connect to the outside world and perform voltage conversion, and at least two battery interfaces configured to connect to the power battery.

10. The energy storage main control box according to claim 9, characterized in that: The protection unit includes at least one or more of a fuse, a shunt, and a circuit breaker, and the monitoring unit includes at least two BMUs connected in series.

11. The energy storage main control box according to claim 9, characterized in that: The main control circuit includes: multiple BMUs connected in series, a first battery interface, a first fuse, a first contactor, a first circuit breaker, a DC-DC connector, a second fuse, a second circuit breaker, a second contactor, a shunt, and a second battery interface. The input end of the sub-control circuit is connected to the node between the first contactor and the first circuit breaker, and the output end is connected to the node between the second contactor and the second circuit breaker.

12. An energy storage box, characterized in that: include: A box body, a battery cluster arranged on the box body battery rack, an electrical cabinet and an energy storage main control box as described in any one of claims 1-11.

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