Energy storage device and power utilization system

Abstract

The utility model relates to an energy storage device and a power utilization system, and the device comprises a box body which has a length direction and a height direction; the battery clusters are stacked in the box body in the height direction, each battery cluster extends in the length direction of the box body, and a total positive power line and a total negative power line of all the battery clusters are located on the assembling side of the box body in the length direction; the confluence control cabinet is arranged on the assembling side of the box body, and a switching power supply is arranged in the confluence control cabinet; and a plurality of switch control units, the plurality of switch control units are stacked in the confluence control cabinet along the height direction and are electrically connected with the switch power supply, and the switch control units and the battery clusters are arranged in a one-to-one correspondence manner. And the switch control units are electrically connected with the total positive power lines and the total negative power lines of the corresponding battery clusters.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage, and in particular to an energy storage device and an electricity system. Background Art

[0002] Energy storage equipment is currently widely used in all walks of life, providing great convenience for meeting the electricity needs of life and production. In the related technology, energy storage equipment generally includes multiple battery clusters, each battery cluster is provided with several battery modules and a high-voltage box. In addition, the energy storage equipment is also provided with a junction box and a control cabinet. After several battery modules are connected in series, the total positive and total negative enter the high-voltage box. The high-voltage box is provided with a switching power supply, a total negative relay, a total positive relay, a pre-charge relay, a BMS main control, etc., wherein the switching power supply (a component in the UPS three-piece set) is used to power the total positive relay, the total negative relay, the pre-charge relay, the BMS main control and other components to meet the normal working requirements. All the total positive and total negative drawn from the high-voltage box finally enter the junction cabinet and are merged through the junction cabinet. The control cabinet is also provided with a separate switching power supply to power the relays, EMS (energy management system), fire control panel, etc. in the control cabinet.

[0003] However, the structural design of the above energy storage device, on the one hand, has switching power supplies installed in the high-voltage box and the control cabinet respectively, resulting in a large number of switching power supplies used, low utilization rate, and high equipment cost; on the other hand, since the high-voltage boxes are arranged at the bottom of each battery cluster, all battery clusters of the energy storage system need to be connected in parallel in the end to achieve connection with the power grid through connection with the energy storage inverter, then the power lines led out from the high-voltage boxes need to be finally gathered at the confluence point, which will result in a huge amount of high-voltage cable length and low-voltage cable length in the energy storage device, high equipment cost, and since the high-voltage cables need to meet the overcurrent requirements, they are generally thicker copper cables, with large cable weight and high cost, and since the cables cross the border and are arranged side by side, the cables occupy a large space and need to be additionally fixed, and at the same time, since the cable length is long, the corresponding line resistance is also large, the power line generates a lot of heat, resulting in heat loss of electric energy, resulting in increased energy consumption of the energy storage device. Summary of the invention

[0004] Based on this, it is necessary to provide an energy storage device and power system to address the problems of high equipment cost, large space occupation, heat loss and high energy consumption.

[0005] In one aspect of the present application, an energy storage device is provided, comprising:

[0006] A box body, wherein the box body has a length direction and a height direction;

[0007] A plurality of battery clusters, wherein the plurality of battery clusters are stacked in the box along the height direction, each of the battery clusters is arranged extending along the length direction of the box, and the total positive power lines and the total negative power lines of all the battery clusters are located on the assembly side of the length direction of the box;

[0008] A confluence control cabinet, which is arranged on the assembly side of the box body and has a switch power supply arranged therein; and

[0009] A plurality of switch control units are stacked in the height direction in the convergence control cabinet and are electrically connected to the switch power supply. The switch control units are arranged one-to-one with the battery clusters, and the switch control units are electrically connected to the total positive power line and the total negative power line of the corresponding battery cluster.

[0010] Compared with the traditional energy storage equipment, the energy storage device of this scheme changes the battery clusters originally arranged along the height direction to be arranged along the length direction of the box, so that multiple battery clusters are stacked in the height direction of the box, so that the total positive power line and the total negative power line of each battery cluster can be located on the assembly side of the box. On this basis, the convergence control cabinet is installed on the assembly side at the same time, and the high-voltage box at the bottom of each battery cluster is removed, and the switch control unit composed of electrical components inside the high-voltage box is transferred to the convergence control cabinet, so that each switch control unit can be directly connected to the total positive power line and the total negative power line of the corresponding battery cluster. In this way, on the one hand, Multiple switch control units can share the switch power supply in the convergence control cabinet for power supply, and there is no need to configure a switch power supply for each high-voltage box (i.e., each switch control unit), thereby greatly reducing the number of switch power supplies used to reduce equipment costs and improve utilization; on the other hand, the total positive power line and the total negative power line of each battery cluster are directly electrically connected to the switch control unit in the convergence control cabinet, avoiding the need to use high-voltage cables and low-voltage cables for connection, saving cable usage costs, reducing cable space, and at the same time, avoiding the heat loss of electric energy caused by the long cable length, the corresponding large line resistance, and the large heat generated by the power line, resulting in increased energy consumption of the energy storage equipment.

[0011] The technical solution of this application is further described below:

[0012] In one embodiment, the battery cluster includes a plurality of series power lines and a plurality of battery packs, the plurality of battery packs are arranged in an even number of layers in the height direction of the box, and all the battery packs are connected in series through the series power lines;

[0013] The battery pack located at the top layer and closest to the convergence control cabinet is electrically connected to the corresponding switch control unit through the total positive power line, and the battery pack located at the bottom layer and closest to the convergence control cabinet is electrically connected to the corresponding switch control unit through the total negative power line. Multiple battery packs can be electrically connected in series through series power lines so that current can be output to the convergence control cabinet through the total positive power line and the total negative power line.

[0014] In one embodiment, in two adjacent layers of battery packs, the positive electrode of the battery pack located in the upper layer is arranged in alignment with the negative electrode of the battery pack located in the lower layer in the height direction of the box; and / or, the negative electrode of the battery pack located in the upper layer is arranged in alignment with the positive electrode of the battery pack located in the lower layer in the height direction of the box. The relative positions of the positive and negative electrodes of the two battery packs in the upper and lower adjacent layers can facilitate the use of series power lines to connect the adjacent battery packs in series.

[0015] In one embodiment, the energy storage device further includes a plurality of liquid cooling units, a plurality of liquid cooling pipeline water inlet assemblies and a plurality of liquid cooling pipeline water outlet assemblies. Each battery cluster includes a plurality of battery pack units arranged along the length direction of the box. The plurality of battery pack units of different battery clusters arranged in the height direction of the box are arranged in the same column. A liquid cooling unit is installed at the bottom of each column of battery pack units. The water inlet of the battery pack units in the same column is connected to the drain outlet of the liquid cooling unit through the liquid cooling pipeline water inlet assembly, and the water outlet of the battery pack units in the same column is connected to the return water outlet of the liquid cooling unit through the liquid cooling pipeline water outlet assembly. It can achieve thermal management of multiple battery packs in the same column with the help of the liquid cooling unit arranged at the bottom, ensuring that the battery packs work safely and reliably for a long time.

[0016] In one embodiment, the confluence control cabinet includes a cabinet body and multiple groups of positive connectors and negative connectors respectively arranged on the cabinet body, and the total positive power line of each battery cluster is electrically connected to the corresponding switch control unit through the corresponding positive connector, and the total negative power line of each battery cluster is electrically connected to the corresponding switch control unit through the corresponding negative connector. The positive connector and the negative connector can be used as transfer connection ports to connect the total positive power line and the total negative power line to the switch control unit respectively, thereby improving the connection reliability between the total positive power line and the total negative power line and the switch control unit.

[0017] In one embodiment, the switch control unit includes a first fuse, a second fuse, a fusion switch, a Hall sensor, a positive lead-out copper busbar, and a negative lead-out copper busbar, the two ends of the first fuse are electrically connected to the positive connector and the fusion switch, respectively, the two ends of the second fuse are electrically connected to the negative connector and the fusion switch, respectively, the positive lead-out copper busbar and the negative lead-out copper busbar are electrically connected to the fusion switch, respectively, and the Hall sensor is electrically connected to the positive lead-out copper busbar. The first fuse and the second fuse are used to provide fuse protection when the current rises abnormally. As a power monitoring component in the energy storage device, the Hall sensor provides accurate current measurement data to ensure that the energy storage device operates more safely and reliably.

[0018] In one embodiment, the bus control cabinet further includes a positive bus fixed bar, a negative bus fixed bar, a plurality of bus copper bars with total positive and a plurality of bus copper bars with total negative. The positive lead copper bar is electrically connected to the positive bus fixed bar through the corresponding bus copper bar with total positive, and the negative lead copper bar is electrically connected to the negative bus fixed bar through the corresponding bus copper bar with total negative. The positive lead copper bar and the negative lead copper bar are respectively led and converged to the positive bus fixed bar and the negative bus fixed bar of the bus device through the bus copper bar with total positive and bus copper bar with total negative, so as to achieve the purpose of convergence.

[0019] In one embodiment, the busbar control cabinet further includes a fixed bracket, which is arranged on the inner wall of the cabinet body, and includes a fixed seat and fixed teeth arranged on the fixed seat at intervals, and a fixed groove is formed between two adjacent fixed teeth, and the fixed teeth are arranged as an introduction part at the notch of the fixed groove. The busbar positive and the busbar negative are arranged separately to ensure the safety of the wiring. At the same time, the fixed bracket can also make all the busbar positive and busbar negative wiring regular and orderly, and the wiring is beautiful and neat.

[0020] In one embodiment, the positive busbar and the negative busbar are both provided with AC terminals, which are used to connect the high voltage after parallel busbar connection with the inverter on the AC side, thereby achieving grid connection.

[0021] In another aspect of the present application, there is also provided an electricity system, comprising:

[0022] Electricity users; and

[0023] The energy storage device as described above is electrically connected to the electricity-consuming entity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] FIG1 is a schematic structural diagram of an energy storage device according to an embodiment of the present application.

[0027] FIG. 2 is a partial enlarged structural diagram of point A in FIG. 1 .

[0028] Figure 3 It is a left-view structural schematic diagram of Figure 1.

[0029] Figure 4 Schematic diagram of the structure of the battery cluster in Figure 1.

[0030] Figure 5 The figure is a structural diagram of the assembly of a confluence control cabinet and a switch control unit according to an embodiment.

[0031] Figure 6 for Figure 5 A schematic diagram of the structure from another perspective.

[0032] Figure 7 The figure is a schematic structural diagram of a fixing bracket according to an embodiment.

[0033] Figure 8 for Figure 7 Front view structure diagram.

[0034] Fig. 9 for Figure 8 Cross-sectional structure diagram at BB in the middle.

[0035] Description of reference numerals:

[0036] 100, energy storage device; 10, box; 20, battery cluster; 21, total positive power line; 22, total negative power line; 23, series power line; 24, battery pack; 30, confluence control cabinet; 31, switching power supply; 32, cabinet; 33, positive connector; 34, negative connector; 35, first fuse; 36, second fuse; 37, fusion switch; 37a, fusion switch handle; 38, Hall sensor; 39, positive lead Outlet copper bus; 39a, negative electrode lead-out copper bus; 39b, positive bus fixed bus; 39c, negative bus fixed bus; 39d, bus copper bus total positive; 39e, bus copper bus total negative; 39f, fixed bracket; 391f, fixed seat; 392f, fixed tooth; 393f, fixed groove; 39g, AC wiring terminal; 40, switch control unit; 50, liquid cooling unit; 60, liquid cooling pipeline water inlet assembly; 70, liquid cooling pipeline water outlet assembly. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0043] See Figure 1 and Figure 3 , is an energy storage device 100 shown in an embodiment of the present application, which includes a box body 10, a plurality of battery clusters 20, a convergence control cabinet 30 and a plurality of switch control units 40.

[0044] The box body 10 is a rectangular box body structure, so the box body 10 has a length direction and a height direction. An installation cavity is formed inside the box body 10 and can be used to install electrical components such as the battery cluster 20.

[0045] Multiple battery clusters 20 are stacked in the box 10 along the height direction, each battery cluster 20 extends along the length direction of the box 10, and the total positive power line 21 and the total negative power line 22 of all the battery clusters 20 are located on the assembly side of the box 10 in the length direction.

[0046] It is necessary to explain that the assembly side is one of the two side surfaces in the length direction of the box body 10 , and is the position where the battery cluster 20 and the convergence control cabinet 30 are assembled and connected.

[0047] Please continue to refer to Figures 2 and Figure 4 The battery cluster 20 is composed of a battery cluster frame and a plurality of battery packs 24 . The battery cluster frame is mounted and fixed on the inner wall of the box body 10 so as to load and fix the battery packs 24 .

[0048] The confluence control cabinet 30 is arranged on the assembly side of the box body 10, and a switching power supply 31 is arranged in the confluence control cabinet 30; multiple switch control units 40 are stacked in the height direction in the confluence control cabinet 30 and are all electrically connected to the switching power supply 31. The switch control units 40 are arranged one by one corresponding to the battery clusters 20, and the switch control units 40 are electrically connected to the total positive power line 21 and the total negative power line 22 of the corresponding battery cluster 20.

[0049] In summary, the implementation of the technical solution of this embodiment will have the following beneficial effects: compared with traditional energy storage equipment, the energy storage device 100 of this solution changes the battery cluster 20 originally arranged along the height direction to an arrangement extending along the length direction of the box body 10, so that multiple battery clusters 20 are stacked in the height direction of the box body 10, so that the total positive power line 21 and the total negative power line 22 of each battery cluster 20 can be located on the assembly side of the box body 10. On this basis, the convergence control cabinet 30 is installed on the assembly side at the same time, and the high-voltage box at the bottom of each battery cluster 20 is removed, and the switch control unit 40 composed of electrical components inside the high-voltage box is transferred to the convergence control cabinet 30, so that each switch control unit 40 can be directly connected to the total positive power line 21 and the total negative power line 22 of a corresponding battery cluster 20.

[0050] In this way, on the one hand, multiple switch control units 40 can share the switch power supply 31 in the convergence control cabinet 30 for power supply, and there is no need to configure a switch power supply 31 for each high-voltage box (that is, each switch control unit 40), thereby greatly reducing the number of switch power supplies 31 used to reduce equipment costs and improve utilization; on the other hand, the total positive power line 21 and the total negative power line 22 of each battery cluster 20 are directly electrically connected to the switch control unit 40 in the convergence control cabinet 30, avoiding the need to use high-voltage cables and low-voltage cables for connection, saving cable usage costs, reducing cable space, and at the same time, avoiding the heat loss of electric energy caused by the long cable length, the corresponding large line resistance, and the large heat generation of the power line, resulting in increased energy consumption of the energy storage device.

[0051] Please continue reading Figure 4On the basis of the above embodiment, the battery cluster 20 includes a battery cluster frame, a plurality of series power lines 23 and a plurality of battery packs 24, and the plurality of battery packs 24 are arranged in an even number of layers in the height direction of the box 10, and all the battery packs 24 are connected in series through the series power lines 23. Therefore, the plurality of battery packs 24 can be electrically connected in series through the series power lines 23, so that the current can be output to the convergence control cabinet 30 through the total positive power line 21 and the total negative power line 22.

[0052] It can be understood that this embodiment uses an even number of layers of battery packs 24 arranged in the height direction, in order to facilitate the connection of the total positive power line 21 and the total negative power line 22 to the topmost and bottommost battery packs 24 respectively, so as to achieve busbar output.

[0053] For example, an even-numbered layer is set to n, and n is 2, 4, 6... This embodiment shows an implementation in which a single battery cluster 20 adopts a 2-layer battery pack 24 structure, and each layer of battery pack 24 includes 4 battery packs 24. Of course, other embodiments may also be other settings, which can be set according to actual needs.

[0054] A battery pack 24 located at the top and closest to the convergence control cabinet 30 is electrically connected to the corresponding switch control unit 40 through the total positive power line 21, and a battery pack 24 located at the bottom and closest to the convergence control cabinet 30 is electrically connected to the corresponding switch control unit 40 through the total negative power line 22. The current of all battery packs 24 of each battery cluster 20 can be transmitted to the switch control unit 40 through the total positive power line 21 and the total negative power line 22.

[0055] It is easy to understand that since the total positive power line 21 and the total negative power line 22 of each battery cluster 20 are arranged close to the convergence control cabinet 30, the distance to the corresponding switch control unit 40 in the convergence control cabinet 30 is also very close, so that fast and reliable electrical connection can be achieved without cable connection.

[0056] On the basis of the above embodiment, in two adjacent layers of battery packs 24, the positive electrode of the battery pack 24 located in the upper layer is aligned with the negative electrode of the battery pack 24 located in the lower layer in the height direction of the box 10; and / or, the negative electrode of the battery pack 24 located in the upper layer is aligned with the positive electrode of the battery pack 24 located in the lower layer in the height direction of the box 10. Such an arrangement enables the positive and negative electrodes of the two battery packs 24 in the upper and lower adjacent layers to be relatively positioned, and it is convenient to use the series power line 23 to connect the adjacent battery packs 24 in series.

[0057] Please continue to refer to FIG. 1. In addition, in some optional embodiments, the energy storage device 100 further includes a plurality of liquid cooling units 50, a plurality of liquid cooling pipeline water inlet assemblies 60 and a plurality of liquid cooling pipeline water outlet assemblies 70. Each battery cluster 20 includes a plurality of battery packs 24 arranged along the length direction of the box 10. The plurality of battery pack units of different battery clusters 20 arranged in the height direction of the box 10 are arranged in the same row. A liquid cooling unit 50 is installed at the bottom of each row of battery packs 24. The water inlet of the battery packs 24 in the same row is connected to the drain outlet of the liquid cooling unit 50 through the liquid cooling pipeline water inlet assembly 60. The water outlet of the battery pack units in the same row is connected to the return water outlet of the liquid cooling unit 50 through the liquid cooling pipeline water outlet assembly 70. In this way, the plurality of battery packs 24 in the same row can be thermally managed with the help of the liquid cooling unit 50 arranged at the bottom, ensuring that the battery packs 24 work safely and reliably for a long time. Compared with the traditional centralized liquid cooling unit 50 (i.e., only one liquid cooling unit 50 is installed on one side of the box body 10, and not all battery packs 24 are supplied with cooling medium), the multiple liquid cooling units 50 of this solution form a distributed structure, so that each liquid cooling unit 50 only needs to supply circulating cooling medium to a smaller number of battery packs 24 arranged in the same row, which can greatly improve the cooling efficiency, reduce flow resistance, and enhance the thermal management capability of the liquid cooling unit 50.

[0058] Specifically, each battery pack 24 is provided with a water inlet and a water outlet, and the liquid cooling pipeline water inlet assembly 60 and the liquid cooling pipeline water outlet assembly 70 are both composed of a main confluence pipe and a plurality of branch pipes, one end of the branch pipes is connected to the corresponding water inlet and water outlet, and the other end is connected to the main confluence pipe, which is then connected to the liquid cooling unit 50. A small number of pipelines are used, the structure is compactly arranged, and less space is occupied.

[0059] Please continue to refer to Figure 2. Figure 3 and Figure 6 In some optional embodiments, the confluence control cabinet 30 includes a cabinet 32 ​​and a plurality of groups of positive connectors 33 and negative connectors 34 respectively arranged on the cabinet 32. The total positive power line 21 of each battery cluster 20 is electrically connected to the corresponding switch control unit 40 through the corresponding positive connector 33, and the total negative power line 22 of each battery cluster 20 is electrically connected to the corresponding switch control unit 40 through the corresponding negative connector 34. The positive connector 33 and the negative connector 34 can be used as transfer connection ports to connect the total positive power line 21 and the total negative power line 22 to the switch control unit 40, respectively, to improve the connection reliability between the total positive power line 21 and the total negative power line 22 and the switch control unit 40.

[0060] For example, a combination structure of a quick-connect socket and a quick-connect plug may be used between the positive connector 33 and the total positive power line 21 and between the negative connector 34 and the total negative power line 22, which facilitates convenient and quick connection or separation.

[0061] Please continue reading Figure 5 On the basis of any of the above embodiments, specifically, the switch control unit 40 includes a first fuse 35, a second fuse 36, a fusion switch 37, a Hall sensor 38, a positive lead-out copper bus 39 and a negative lead-out copper bus 39a, the two ends of the first fuse 35 are electrically connected to the positive connector 33 and the fusion switch 37, respectively, the two ends of the second fuse 36 are electrically connected to the negative connector 34 and the fusion switch 37, the positive lead-out copper bus 39 and the negative lead-out copper bus 39a are electrically connected to the fusion switch 37, respectively, and the Hall sensor 38 is electrically connected to the positive lead-out copper bus 39.

[0062] The first fuse 35 and the second fuse 36 are used to provide fuse protection when the current rises abnormally. The fusion switch 37 transforms the current transmitted from the total positive power line 21 and the total negative power line 22, and then transmits it further downstream through the positive lead copper bus 39 and the negative lead copper bus 39a. The Hall sensor 38 can be used to measure the magnitude and direction of the current. As a power monitoring component in the energy storage device 100, it provides accurate current measurement data to ensure that the energy storage device 100 works more safely and reliably.

[0063] A fusion switch handle 37 a is also installed on the outer wall of the cabinet 32 ​​. The fusion switch handle 37 a is arranged close to the positive connector 33 and the negative connector 34 . The fusion switch handle 37 a is connected to the fusion switch 37 so as to operate the fusion switch 37 .

[0064] In addition, a status indicator light is installed on the cabinet body 32 to conveniently display the working status of the convergence control cabinet 30.

[0065] Further, on the basis of the above embodiment, the bus control cabinet 30 also includes a positive bus fixed bar 39b, a negative bus fixed bar 39c, a plurality of bus copper bars total positive 39d and a plurality of bus copper bars total negative 39e, the positive lead copper bar 39 is electrically connected to the positive bus fixed bar 39b through the corresponding bus copper bar total positive 39d, and the negative lead copper bar 39a is electrically connected to the negative bus fixed bar 39c through the corresponding bus copper bar total negative 39e. In this way, the positive lead copper bar 39 and the negative lead copper bar 39a are respectively led and converged to the positive bus fixed bar 39b and the negative bus fixed bar 39c of the bus device through the bus copper bar total positive 39d and the bus copper bar total negative 39e, so as to achieve the purpose of convergence.

[0066] Please continue reading Figures 7 to 9Furthermore, the confluence control cabinet 30 also includes a fixed bracket 39f, which is arranged on the inner wall of the cabinet body 32. The fixed bracket 39f includes a fixed seat 391f and fixed teeth 392f arranged at intervals on the fixed seat 391f. A fixed groove 393f is formed between two adjacent fixed teeth 392f, and the fixed tooth 392f is set as an inlet part located at the notch of the fixed groove 393f.

[0067] During installation, each two adjacent fixing grooves 393f are used to respectively clamp and fix a pair of busbar total positive 39d and busbar total negative 39e corresponding to a switch control unit 40, so as to separate the busbar total positive 39d and the busbar total negative 39e to ensure the wiring safety. At the same time, the fixing bracket 39f can also make all the busbar total positive 39d and the busbar total negative 39e be wired in an orderly manner, and the wiring is beautiful and tidy, and no additional fixing is required. The introduction part is used to make the busbar total positive 39d and the busbar total negative 39e easier to be clamped into the fixing groove 393f, while preventing the slot from being too narrow and scratching the busbar total positive 39d and the busbar total negative 39e.

[0068] In one embodiment, the positive bus fixing bar 39b and the negative bus fixing bar 39c are both provided with AC wiring terminals 39g, so that the high voltage after the bus parallel connection can be connected to the inverter on the AC side through the AC wiring terminals 39g, so as to achieve grid connection.

[0069] In addition to the above, the present application also provides an electricity consumption system, which includes an electricity consumption subject and an energy storage device 100 as described in any of the above embodiments, and the energy storage device 100 is electrically connected to the electricity consumption subject. The electricity consumption subject can be any type of electricity consumption equipment in the prior art, such as electric vehicles, electric tools, electric toys, etc.

[0070] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An energy storage device, characterized in that: include: A box body, wherein the box body has a length direction and a height direction; A plurality of battery clusters, wherein the plurality of battery clusters are stacked in the box along the height direction, each of the battery clusters is arranged extending along the length direction of the box, and the total positive power lines and the total negative power lines of all the battery clusters are located on the assembly side of the length direction of the box; A confluence control cabinet, which is arranged on the assembly side of the box body and has a switch power supply arranged therein; and A plurality of switch control units are stacked in the height direction in the convergence control cabinet and are electrically connected to the switch power supply. The switch control units are arranged one-to-one with the battery clusters, and the switch control units are electrically connected to the total positive power line and the total negative power line of the corresponding battery cluster.

2. The energy storage device according to claim 1, characterized in that: The battery cluster includes a plurality of series power lines and a plurality of battery packs, the plurality of battery packs are arranged in an even number of layers in the height direction of the box, and all the battery packs are connected in series through the series power lines; The battery pack located at the top layer and closest to the convergence control cabinet is electrically connected to the corresponding switch control unit through the total positive power line, and the battery pack located at the bottom layer and closest to the convergence control cabinet is electrically connected to the corresponding switch control unit through the total negative power line.

3. The energy storage device according to claim 2, characterized in that: In two adjacent layers of battery packs, the positive electrode of the battery pack located on the upper layer and the negative electrode of the battery pack located on the lower layer are arranged in alignment in the height direction of the box; and / or, the negative electrode of the battery pack located on the upper layer and the positive electrode of the battery pack located on the lower layer are arranged in alignment in the height direction of the box.

4. The energy storage device according to claim 1, characterized in that: The energy storage device also includes multiple liquid cooling units, multiple liquid cooling pipeline water inlet assemblies and multiple liquid cooling pipeline water outlet assemblies. Each of the battery clusters includes multiple battery pack units arranged along the length direction of the box body. The multiple battery pack units of different battery clusters arranged in the height direction of the box body are arranged in the same column. A liquid cooling unit is installed at the bottom of each column of battery pack units. The water inlets of the battery pack units in the same column are connected to the drain outlet of the liquid cooling unit through the liquid cooling pipeline water inlet assembly, and the water outlets of the battery pack units in the same column are connected to the return water outlet of the liquid cooling unit through the liquid cooling pipeline water outlet assembly.

5. The energy storage device according to any one of claims 1 to 4, characterized in that: The convergence control cabinet includes a cabinet body and multiple groups of positive connectors and negative connectors respectively arranged on the cabinet body. The total positive power line of each battery cluster is electrically connected to the corresponding switch control unit through the corresponding positive connector, and the total negative power line of each battery cluster is electrically connected to the corresponding switch control unit through the corresponding negative connector.

6. The energy storage device according to claim 5, characterized in that: The switch control unit includes a first fuse, a second fuse, a fusion switch, a Hall sensor, a positive lead-out copper busbar, and a negative lead-out copper busbar. Two ends of the first fuse are electrically connected to the positive connector and the fusion switch, respectively. Two ends of the second fuse are electrically connected to the negative connector and the fusion switch, respectively. The positive lead-out copper busbar and the negative lead-out copper busbar are electrically connected to the fusion switch, respectively. The Hall sensor is electrically connected to the positive lead-out copper busbar.

7. The energy storage device according to claim 6, characterized in that: The bus control cabinet also includes a positive bus fixed bar, a negative bus fixed bar, multiple bus copper bars with a total positive and multiple bus copper bars with a total negative. The positive lead-out copper bar is electrically connected to the positive bus fixed bar through the corresponding bus copper bar with a total positive, and the negative lead-out copper bar is electrically connected to the negative bus fixed bar through the corresponding bus copper bar with a total negative.

8. The energy storage device according to claim 7, characterized in that: The convergence control cabinet also includes a fixed bracket, which is arranged on the inner wall of the cabinet body. The fixed bracket includes a fixed seat and fixed teeth arranged on the fixed seat at intervals. A fixed groove is formed between two adjacent fixed teeth, and the fixed tooth is set as an inlet part located at the notch of the fixed groove.

9. The energy storage device according to claim 7, characterized in that: The positive bus fixing bar and the negative bus fixing bar are both provided with AC wiring terminals.

10. An electricity system, characterized in that: include: Electricity users; as well as, The energy storage device as described in any one of claims 1 to 9 above is characterized in that the energy storage device is electrically connected to the electricity-consuming entity.

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