Control box, energy storage apparatus and electrical system

Abstract

The present application relates to a control box, an energy storage apparatus and an electrical system. The control box comprises at least two control modules and wiring assemblies, wherein each of the control modules is used for controlling the battery state of a battery cluster, the control module comprises a switch assembly and a connecting end that is electrically connected to the switch assembly, and the switch assembly is configured to control the connection / disconnection of the connecting end; and the wiring assemblies are used for connecting the control modules to the battery cluster, the wiring assemblies are arranged corresponding to the control modules, each of the wiring assemblies comprises terminals, which are electrically connected to the connecting end, respectively. According to the control box, the energy storage apparatus and an electrical device provided in the embodiments of the present application, the control box can control a plurality of battery clusters at the same time, such that the volume of an applied energy storage apparatus is reduced, thereby improving the energy density of the energy storage apparatus.

Description

Control box, energy storage device and power system Technical Field

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

[0002] Energy storage devices are devices that store energy temporarily or permanently. In recent years, new energy vehicles have experienced rapid growth. In the electric vehicle sector, power batteries, as the power source, play an irreplaceable and important role. Common energy storage devices utilize power batteries to store electrical energy. These devices include a control box that controls the battery pack.

[0003] The control box in the related art has limited control capabilities. When used in an energy storage device, multiple control boxes need to be set up to meet the control of multiple battery clusters, which increases the volume of the energy storage device and is not conducive to improving the energy density of the energy storage device.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a control box, an energy storage device, and an electricity consumption system. The control box can control multiple battery clusters simultaneously, reduce the volume of the energy storage device used, and improve the energy density of the energy storage device.

[0006] On the one hand, according to an embodiment of the present application, a control box is provided, comprising at least two control modules and a wiring assembly, wherein the control module is used to control the battery status of a battery cluster, the control module comprises a switch assembly and a connection end electrically connected to the switch assembly, and the switch assembly is configured to control the on and off of the connection end; the wiring assembly is used to connect the control module to the battery cluster, the wiring assembly is arranged corresponding to the control module, and the wiring assembly comprises terminals, which are respectively electrically connected to the connection ends.

[0007] In the technical solution of the embodiment of the present application, its control module includes a switch component and a connection end electrically connected to the switch component. The connection end can be connected to the battery cluster through the connected terminal to achieve control of the battery status of the battery cluster. Since the control box includes at least two control modules, when it is used in an energy storage device, it can be connected to multiple battery clusters in the energy storage device through different control modules at the same time. There is no need to set up a corresponding control box for each battery cluster, which can reduce the number of control boxes used in the energy storage device, thereby reducing the volume of the energy storage device and improving its energy density.

[0008] In some embodiments, the control box further includes a box body, the control module is disposed in the box body, and the wiring assembly is disposed on a wall of the box body.

[0009] The control box provided by one embodiment of the present application can protect the plurality of control modules by the box body, ensure the safety and compactness of the control box, and arrange the wiring assembly on the wall of the box body, so as to facilitate the fixation of the wiring assembly and the connection between the terminals of the wiring assembly and the battery cluster.

[0010] In some embodiments, the wall of the box body has a first wall surface, and the terminals of each wiring assembly are arranged on the first wall surface.

[0011] The control box provided by one embodiment of the present application can make the terminals of each control module face the side of the door body or the like, which is convenient for operating any wiring, when the control box is installed on the energy storage device, so as to reduce the connection and maintenance difficulty of the wiring.

[0012] In some embodiments, the connection end includes a first connection port, a second connection port, a third connection port and a fourth connection port connected with the switch assembly, the switch assembly is configured to control the on-off of the first connection port and the second connection port and control the on-off between the third connection port and the fourth connection port, the first connection port and the third connection port are used to be connected with the battery cluster, and the second connection port and the fourth connection port are used to be connected with external devices.

[0013] The control box provided by one embodiment of the present application can connect the control module with the battery cluster and the external devices through the connection end, control the on-off of the first connection port, the second connection port, the third connection port and the fourth connection port through the switch assembly, and then realize the connection or disconnection between the battery cluster and the external devices, so as to ensure the power supply and power-off demand of the external devices.

[0014] In some embodiments, the terminal includes a first terminal part and a second terminal part, the first terminal part is used to connect the control module with the battery cluster, and the second terminal part is used to connect the control module with the external devices.

[0015] The control box provided by one embodiment of the present application can connect the control module with the battery cluster and the external devices through the connection end, control the on-off of the first connection port, the second connection port, the third connection port and the fourth connection port through the switch assembly, and then realize the connection or disconnection between the battery cluster and the external devices, so as to ensure the power supply and power-off demand of the external devices.

[0016] In some embodiments, the first terminal part of each wiring assembly is arranged on the same side of the box body along a first direction and is spaced along a second direction, and the first direction intersects the second direction.

[0017] The control box provided by one embodiment of the present application is connected with the plurality of battery clusters, and the wires connected with the battery clusters are all accessed from the side of the control box in the first direction, which is beneficial to the layout of the battery clusters connected with the same control box and can ensure the regularity of the wires.

[0018] In some embodiments, the box body has oppositely arranged first and second side walls in the first direction, the interface of each first terminal part is arranged towards the first side wall, and the minimum vertical distance of each first terminal part to the second side wall gradually decreases from one side to the other side in the second direction.

[0019] The control box provided by one embodiment of the present application is connected with the plurality of battery clusters, and the wires connected with the battery clusters are all accessed from the side of the control box in the first direction, which is beneficial to the layout of the battery clusters connected with the same control box and can ensure the regularity of the wires.

[0020] In some embodiments, the first and third connection ports of each control module are respectively connected with first terminal parts, and the first terminal parts connected with the first connection ports and the first terminal parts connected with the third connection ports are alternately arranged in the second direction.

[0021] The control box provided by one embodiment of the present application is connected with the plurality of battery clusters, and the wires connected with the battery clusters are all accessed from the side of the control box in the first direction, which is beneficial to the layout of the battery clusters connected with the same control box and can ensure the regularity of the wires.

[0022] In some embodiments, the second terminal parts of each wiring assembly are arranged on the side of the box body opposite to the first terminal parts in the first direction, the second terminal parts are spaced apart in the first direction, and the adjacent two second terminal parts are arranged in a staggered manner in the second direction.

[0023] The control box provided by one embodiment of the present application is connected with the plurality of battery clusters, and the wires connected with the battery clusters are all accessed from the side of the control box in the first direction, which is beneficial to the layout of the battery clusters connected with the same control box and can ensure the regularity of the wires.

[0024] In some embodiments, the second and fourth connection ports of each control module are respectively connected with second terminal parts, the box body has oppositely arranged third and fourth side walls in the second direction, the interface of each second terminal part is arranged towards the fourth side wall, the minimum vertical distance of the second terminal part connected with the second connection port to the third side wall is H1, the minimum vertical distance of the second terminal part connected with the fourth connection port to the third side wall is H2, and the absolute value of the difference between H1 and H2 is greater than zero.

[0025] The control box provided by one embodiment of the present application is beneficial to the layout of the second terminal part connected with the second connection port and the second terminal part connected with the fourth connection port on the first wall surface, and is beneficial to the arrangement of the external line connected with each second terminal part, thereby ensuring the electrical connection requirement between the control box and the external device.

[0026] In some embodiments, the switch assembly includes a first switch connected with the first connection port and the second connection port, and a second switch connected with the third connection port and the fourth connection port.

[0027] The control box provided by one embodiment of the present application can control the on-off between the first connection port and the second connection port through the first switch, and control the on-off between the third connection port and the fourth connection port through the second switch, thereby ensuring the electrical connection requirement between the battery cluster and the external device through the control module, and further ensuring the monitoring and charging / discharging requirement of the battery cluster.

[0028] In some embodiments, each control module further includes a pre-charging branch and a third switch, the third switch is connected in parallel with the first switch, and the pre-charging branch is connected in parallel with the second switch, the pre-charging branch includes a pre-charging resistor and a fourth switch connected in series.

[0029] The control box provided by one embodiment of the present application can close the third switch and the fourth switch before the switch assembly is closed to make the first connection port and the second connection port conductive and the third connection port and the fourth connection port conductive, so that the pre-charging resistor is first connected into the loop for pre-charging.

[0030] In some embodiments, each control module further includes a current detector for detecting the current information of the loop in which the control module is located.

[0031] The control box provided by one embodiment of the present application is provided with a current detector, which can be used to monitor the current value of the loop in which the control module is located, and the safety of the control box can be judged according to the change of the current value.

[0032] In some embodiments, each control module further includes a first relay for controlling the on-off of the loop in which the control module is located.

[0033] The control box provided by one embodiment of the present application is provided with a first relay, which is beneficial to ensuring the on-off of the loop in which the control module is located.

[0034] In another aspect, the application provides an energy storage device, comprising a cabinet, a plurality of battery clusters and a control box, the cabinet has a receiving cavity, and the plurality of battery clusters are arranged in the receiving cavity, each battery cluster comprises an interface end; each battery cluster is arranged in correspondence with a control module, and the interface end of the battery cluster is electrically connected with a connection end of the control module arranged in correspondence.

[0035] In the technical scheme of the application, the energy storage device comprises the control box and the plurality of battery clusters, the plurality of control modules are arranged in the cavity of the control box, and the plurality of battery clusters can be connected with the plurality of control modules one by one through different control modules, without arranging one control box for each battery cluster, and in the case of the same number of battery clusters, the energy storage device provided by the application can reduce the number of control boxes, thereby reducing the volume of the energy storage device and improving the energy density of the energy storage device.

[0036] In some embodiments, the number of control boxes is a plurality, and each battery cluster electrically connected with at least two control modules of the same control box is arranged in the same direction.

[0037] The energy storage device provided by the application can improve the energy storage capacity of the energy storage device and further improve the energy density of the energy storage device under the condition of the same cabinet size.

[0038] In some embodiments, the plurality of battery clusters and the control box are arranged in the height direction.

[0039] The energy storage device provided by the application can facilitate the arrangement of each battery cluster connected with each control module of the same control box and the connection and wiring requirement between the terminals of the corresponding control box, while effectively reducing the size of the cabinet and ensuring the energy density of the energy storage device.

[0040] In some embodiments, the control box is arranged above, in the middle or below the plurality of battery clusters in the height direction.

[0041] The energy storage device provided by the application can make the arrangement of the battery clusters and the control box in the energy storage device compact and shorten the length of the connection line between the battery clusters and the terminals of the control box.

[0042] In another aspect, the application provides an energy consumption system, comprising the energy storage device. BRIEF DESCRIPTION OF DRAWINGS

[0043] The features, advantages and technical effects of the exemplary embodiments of the application will be described below with reference to the accompanying drawings.

[0044] FIG. 1 is a structural schematic diagram of a vehicle according to some embodiments of the application.

[0045] Fig. 2 is a structural schematic diagram of an energy storage device according to some embodiments of the present application;

[0046] Fig. 3 is a circuit schematic diagram of a control box according to some embodiments of the present application;

[0047] Fig. 4 is a circuit schematic diagram of a control box according to some other embodiments of the present application;

[0048] Fig. 5 is a structural schematic diagram of a control box according to some embodiments of the present application;

[0049] Fig. 6 is a structural schematic diagram of a control box according to some other embodiments of the present application;

[0050] Fig. 7 is a structural schematic diagram of an energy storage device according to some other embodiments of the present application.

[0051] Wherein:

[0052] 100 - energy storage device; 200 - controller; 300 - motor;

[0053] 10 - control box;

[0054] 11 - box body; 111 - first wall surface; 1111 - first side wall; 1112 - second side wall; 1113 - third side wall; 1114 - fourth side wall;

[0055] 12 - control module;

[0056] 121 - switch assembly; 1211 - first switch; 1212 - second switch;

[0057] 122 - connection end; 1221 - first connection port; 1222 - second connection port; 1223 - third connection port; 1224 - fourth connection port;

[0058] 123 - pre-charge branch; 1231 - pre-charge resistor; 1232 - fourth switch;

[0059] 124 - third switch;

[0060] 125 - current detector;

[0061] 126 - first relay;

[0062] 127 - first electrode bus; 128 - second electrode bus;

[0063] 13 - wiring assembly; 131 - terminal; 131a - first terminal part; 131b - second terminal part;

[0064] 20 - cabinet body; 201 - accommodating cavity; 202 - base; 203 - top part;

[0065] 30 - battery cluster; 31 - battery;

[0066] X - first direction; Y - second direction.

[0067] In the drawings, the same components have the same reference numerals, and the drawings are not drawn to scale. DETAILED DESCRIPTION

[0068] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0069] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be understood as the usual meaning understood by the skilled person in the field to which the embodiments of the present application belong.

[0070] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0071] In addition, the technical terms "first", "second", and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0072] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0073] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature can be "above", "over" and "on" the second feature, which can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature can be "below", "under" and "under" the second feature, which can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0074] The energy storage device refers to a device for temporarily or permanently storing energy. In recent years, new energy vehicles have developed rapidly. In the field of electric vehicles, the energy storage device plays an irreplaceable important role as the power source of electric vehicles.

[0075] The energy storage device can include a control box and a battery cluster. The battery cluster can include at least one battery. The control box included can be connected with the battery cluster. The control box is used to control and manage the battery of the battery cluster, for example, to control the on-off state of the battery cluster.

[0076] The energy storage device in the related art has difficulty in improving the energy density, and has problems such as low energy density. Further research has found that with the continuous development and innovation of the energy storage device technology, the battery capacity of the battery cluster is also continuously improved, and the system grouping efficiency of the battery cluster is required to be higher. Correspondingly, due to the limited control ability of the control box in the related art, when used in the energy storage device, multiple control boxes need to be set to one-to-one connect and control multiple battery clusters, which increases the volume of the energy storage device. Not only is not conducive to the standardization of the energy storage device and the reduction of transportation costs, but also the occupation of multiple control boxes is not conducive to the improvement of the energy density of the energy storage device.

[0077] In order to alleviate the difficulty of improving the energy density of the energy storage device, it is found that the occupied volume of the battery box for controlling each battery cluster can be reduced on the basis of meeting the control requirements of the battery cluster. Based on the above consideration, a control box is designed, which includes at least two control modules and a wiring assembly. The control module is used to control the battery state of the battery cluster, and the control module includes a switch assembly and a connection end electrically connected to the switch assembly. The switch assembly is configured to control the on-off of the connection end. The wiring assembly is used to connect the connection end of the control module with the battery cluster. The wiring assembly is correspondingly arranged with the control module, and the wiring assembly includes a terminal electrically connected with the connection end. In such a control box, since the control box includes at least two control modules, it can be connected with multiple battery clusters in the energy storage device through different control modules when used in the energy storage device. It is not necessary to arrange one control box for each battery cluster, which can reduce the number of control boxes used in the energy storage device, thereby reducing the volume of the energy storage device, so that the overall size of the energy storage device can be limited within a certain range, reducing the transportation cost and improving the energy density.

[0078] The control box disclosed in the embodiments of the present application can be used in an energy storage device. The energy storage device provided can be used in, but not limited to, an electric system of a vehicle, a ship or an aircraft, etc. The embodiments of the present application provide an electric system using an energy storage device as a power source. The electric system can be, but is not limited to, a power tool, an electric vehicle, an electric automobile, a ship, a spacecraft, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0079] The following embodiments are described taking a vehicle as an example for convenience of description.

[0080] Please refer to FIG. 1, which is a structural schematic diagram of a vehicle provided by some embodiments of the present application. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The vehicle is internally provided with an energy storage device 100, which is arranged at the bottom, the head or the tail of the vehicle. The energy storage device 100 can be used for power supply of the vehicle, for example, the energy storage device 100 can be used as an operating power source of the vehicle. The vehicle can further include a controller 200 and a motor 300. The controller 200 is used to control the energy storage device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle during starting, navigation and driving.

[0081] In some embodiments of the present application, the energy storage device 100 can not only be used as an operating power source of the vehicle, but also be used as a driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0082] Please refer to FIG. 2, which is a structural schematic diagram of the energy storage device 100 according to some embodiments of the present application.

[0083] The energy storage device 100 provided by one embodiment of the present application comprises a cabinet 20, at least two battery clusters 30 and a control box 10, the at least two battery clusters 30 are arranged in the cabinet 20, and the battery clusters 30 are connected with the control box 10.

[0084] Please refer to FIG. 3 to FIG. 5, FIG. 3 is a circuit principle diagram of the control box according to some embodiments of the present application, FIG. 4 is a circuit principle diagram of the control box according to some other embodiments of the present application, and FIG. 5 is a structural schematic diagram of the control box according to some embodiments of the present application.

[0085] The control box 10 provided by one embodiment of the present application comprises at least two control modules 12 and a wiring assembly 13, the control modules 12 are used to control the battery state of the battery clusters 30, the control modules 12 comprise a switch assembly 121 and a connection end 122 electrically connected with the switch assembly 121, the switch assembly 121 is configured to control the on-off of the connection end 122, the wiring assembly 13 is used to connect the control modules 12 with the battery clusters 30, the wiring assembly 13 is arranged correspondingly with the control modules 12, and the wiring assembly 13 comprises a terminal 131, which is electrically connected with the connection end 122 respectively.

[0086] As shown in FIG. 3, the number of the control modules 12 comprised by the control box 10 can be two, of course, this is an optional embodiment. As shown in FIG. 4, the number of the control modules 12 comprised by the control box 10 can be three. It can be understood that the control modules 12 comprised by the control box 10 can also comprise more, which can be determined according to the number of the battery clusters 30 to be connected.

[0087] The connection end 122 can be a general term of a plurality of connection ports of the control module 12, and the switch assembly 121 configured to control the on-off of the connection end 122 can be understood as: the switch assembly 121 is configured to control the on-off between different connection ports of the connection end 122. For example, the connection end 122 can comprise a plurality of connection ports, each two connection ports can form a group, and the switch assembly 121 can control the on-off between the two connection ports of each group.

[0088] The wiring assembly 13 is used for the role of connection, and can be used to connect between the connection end 122 of the control module 12 and the interface of the battery cluster 30. The number of the terminals can be no less than the number of the connection ports comprised by the connection end 122, and the terminal 131 can be electrically connected at each connection port of the connection end 122.

[0089] The corresponding arrangement of the wiring assembly 13 with the control module 12 can be understood as: the number of the wiring assembly 13 can be equal to the number of the control module 12 and arranged one by one.

[0090] The battery states mentioned include, but are not limited to, at least one of a battery switch state of the battery cluster, a battery power state, reading voltage, current, temperature information and the like of the battery of the battery cluster.

[0091] An embodiment of the present application provides a control box 10, wherein the control module 12 comprises a switch assembly 121 and a connection end 122 electrically connected with the switch assembly 121, and the connection end 122 can be connected with the battery cluster 30 through the connected terminal 131 to control the switch state of the battery cluster 30. Since the control box 10 comprises at least two control modules 12, when used in the energy storage device 100, the control box 10 can be connected with multiple battery clusters 30 in the energy storage device 100 through different control modules 12 at the same time, and it is not necessary to set one control box 10 for each battery cluster 30, which can reduce the number of control boxes 10 used by the energy storage device 100, and further reduce the volume of the energy storage device 100 and improve the energy density thereof.

[0092] As shown in FIGS. 3-5, according to some embodiments of the present application, the control box 10 optionally further comprises a box body 11, the control module 12 is arranged in the box body 11, and the wiring assembly 13 is arranged on the box wall.

[0093] The box body 11 comprised by the control box 10 can be a polyhedral structure, which can be a regular polyhedral structure or an irregular polyhedral structure.

[0094] The box body 11 can have a cavity, and the box wall can be a wall part enclosing the cavity, for example, when the box body 11 is a hexahedron, the box wall can be the side wall of the box body 11 on each face.

[0095] The wiring assembly 13 can be located on the inner side of the box wall facing the internal cavity of the box body, or on the outer side of the box wall away from the internal cavity of the box body, and can be optionally located on the outer side of the box wall.

[0096] The wiring assembly 13 and the box wall can be connected by a fastener such as a bolt, or can be connected by adhesion.

[0097] An embodiment of the present application provides a control box 10, which can protect multiple control modules 12 by the box body 11, ensure the safety and compactness of the control box 10, and arrange the wiring assembly 13 on the box wall to facilitate the fixation of the wiring assembly 13 and the connection between the terminal 131 of the wiring assembly 13 and the battery cluster 30.

[0098] As shown in FIG. 5, according to some embodiments of the present application, the box wall has a first wall surface 111, and the terminal 131 of each wiring assembly 13 is arranged on the first wall surface 111.

[0099] The first wall surface 111 can be a surface facing away from the internal cavity of the cabinet 11, and can be one of the plurality of wall surfaces of the cabinet 11.

[0100] The terminals of each wiring assembly 13 are arranged on the first wall surface 111, and it can be understood that the terminals 131 of all wiring assemblies 13 corresponding to each control module 12 can be located on the same wall surface of the cabinet wall.

[0101] According to an embodiment of the present application, the control cabinet 10 is provided, by arranging the terminals 131 of the wiring assemblies 13 corresponding to each control module 12 on the first wall surface 111, so that when the control cabinet 10 is installed on the energy storage device 100, each terminal 131 faces the side of the door body or the like, which is convenient for operating any wiring, thereby reducing the connection and maintenance difficulty of the line.

[0102] As shown in FIGS. 3-5, according to some embodiments of the present application, the connection end 122 of each control module 12 includes a first connection port 1221, a second connection port 1222, a third connection port 1223, and a fourth connection port 1224 connected with the switch assembly 121, the switch assembly 121 is configured to control the on-off of the first connection port 1221 and the second connection port 1222 and control the on-off between the third connection port 1223 and the fourth connection port 1224, the first connection port 1221 and the third connection port 1223 are used to connect with the battery cluster 30, and the second connection port 1222 and the fourth connection port 1224 are used to connect with external devices.

[0103] The first connection port 1221 and the second connection port 1222 can be oppositely arranged and connected through the switch assembly 121, and the on-off of the first connection port 1221 and the second connection port 1222 can be realized by opening or closing the switch assembly 121.

[0104] The third connection port 1223 and the fourth connection port 1224 can be oppositely arranged and connected through the switch assembly 121, and the on-off of the third connection port 1223 and the fourth connection port 1224 can be realized by opening or closing the switch assembly 121.

[0105] The external devices include but are not limited to the busbar of the container, the electrical components of the vehicle, and the like.

[0106] The first connection port 1221 and the third connection port 1223 can be used to connect with the interface end of the corresponding arranged battery cluster 30.

[0107] The control box 10 provided by one embodiment of the present application can connect the control module 12 with the battery cluster 30 and the external device through the connection end, control the on-off of the first connection port 1221 and the second connection port 1222 and the on-off of the third connection port 1223 and the fourth connection port 1224 by using the switch assembly 121, and then realize the connection or disconnection between the battery cluster 30 and the external device, thereby ensuring the power supply and power-off demand of the external device.

[0108] As shown in FIGS. 3-5, according to some embodiments of the present application, optionally, the terminal 131 includes a first terminal part 131a and a second terminal part 131b, the first terminal part 131a is used to connect the control module 12 with the battery cluster 30, and the second terminal part 131b is used to connect the control module 12 with the external device.

[0109] The number of the first terminal part 131a included in the terminal 131 can be one or at least two, and optionally at least two. Correspondingly, the number of the second terminal part 131b included in the terminal 131 can be one or at least two, and optionally at least two. The number can be determined according to the number of the connection ports included in the connection end 122 of each control module 12.

[0110] When the connection end 122 includes the first connection port 1221, the second connection port 1222, the third connection port 1223 and the fourth connection port 1224 connected with the switch assembly 121, the first terminal part 131a can be connected to the first connection port 1221 and the third connection port 1223, and the second terminal part 131b can be connected to the second connection port 1222 and the fourth connection port 1224. In operation, the first terminal part 131a and the second terminal part 131b are opposite to the polarity of the interface end of the connected battery cluster 30.

[0111] The control box 10 provided by one embodiment of the present application can connect the control module 12 with the battery cluster 30 and the external device through the connection end, control the on-off of the first connection port 1221 and the second connection port 1222 and the on-off of the third connection port 1223 and the fourth connection port 1224 by using the switch assembly 121, and then realize the connection or disconnection between the battery cluster 30 and the external device, thereby ensuring the power supply and power-off demand of the external device.

[0112] As shown in FIG. 5, according to some embodiments of the present application, optionally, the first terminal part 131a of each wiring assembly 13 is arranged on the same side of the box body 11 along the first direction X and is spaced along the second direction Y, and the first direction X intersects with the second direction Y.

[0113] The included angle between the first direction X and the second direction Y can be any value between 85° and 95°, and optionally 90°, that is, the first direction X and the second direction Y can be perpendicular to each other.

[0114] The box 11 can have opposite two sides and a center surface in the first direction X, and the distance from the two side walls to the center surface of the box 11 in the first direction X can be equal. The first terminal portion 131a of each wiring assembly 13 can be located on one side of the box 11 in the first direction X, which can be understood as: each first terminal portion 131a is located in the region between one side wall and the center surface of the box 11 in the first direction X, and each first terminal portion 131a does not cross the center surface.

[0115] The control box 10 provided by an embodiment of the present application can make the wires connected with the battery cluster 30 all enter from one side of the control box 10 in the first direction X when the control box 10 is connected with the battery cluster 30, which is beneficial to the layout of the battery clusters 30 connected with the same control box 10 and can ensure the regularity of the wires.

[0116] As shown in FIG. 6, FIG. 6 is a structural schematic diagram of a control box according to another embodiment of the present application.

[0117] According to some embodiments of the present application, the box 11 has a first side wall 1111 and a second side wall 1112 arranged oppositely in the first direction X, and the first terminal portions 131a are spaced apart along the second direction Y. The interface of each first terminal portion 131a is arranged towards the first side wall 1111 and extends along the second direction Y from one side to the other side. The minimum vertical distance between each first terminal portion 131a and the second side wall 1112 gradually decreases.

[0118] Each first terminal portion 131a is arranged closer to the first side wall 1111 than the second terminal portion 131b.

[0119] The one side along the second direction Y and extending from one side to the other side can be from top to bottom or from bottom to top. Specifically, the layout can be set according to the installation of the control box 10 to the energy storage device 100. When installed to the energy storage device 100, the first terminal portion 131a farthest from the second side wall 1112 can be arranged closer to the bottom of the cabinet 20 of the energy storage device 100.

[0120] The one side along the second direction Y and extending from one side to the other side, and the minimum vertical distance between each first terminal portion 131a and the second side wall 1112 gradually decreases, which can make the plurality of first terminal portions 131a arranged in a stepped manner along the second direction Y.

[0121] The control box 10 provided by one embodiment of the present application is arranged as above, so that the first terminal portions 131a gradually move away from the second side wall 1112 along the second direction Y from one side to the other side, and further so that the wires connected to the upper first terminal portions 131a along the second direction Y can avoid the wires connected to the lower first terminal portions 131a, thereby reducing the probability of overlapping between the wires connected to the first terminal portions 131a.

[0122] According to some embodiments of the present application, the first connection port 1221 and the third connection port 1223 of each control module 12 are respectively connected with the first terminal portions 131a, and the first terminal portions 131a connected to the first connection port 1221 and the first terminal portions 131a connected to the third connection port 1223 are arranged alternately along the second direction Y.

[0123] Since the control module 12 included in the control box 10 is at least two, correspondingly, the number of the wiring assemblies 13 is at least two, and the first connection port 1221 and the third connection port 1223 of each control module 12 are connected with the first terminal portions 131a included in the corresponding wiring assembly 13.

[0124] The first terminal portions 131a connected to the first connection port 1221 and the first terminal portions 131a connected to the third connection port 1223 are arranged alternately along the second direction Y, which can make the first terminal portions 131a connected to the first connection port 1221 and the third connection port 1223 of the same control module 12 adjacent and staggered along the second direction Y.

[0125] The control box 10 provided by one embodiment of the present application is arranged as above, so that the two first terminal portions 131a connected to each battery cluster 30 are arranged adjacent along the second direction Y, which is beneficial to the layout of the multiple battery clusters 30 connected to the same control box 10 and the electrical connection requirement between the corresponding control modules 12.

[0126] As shown in FIG. 5 and FIG. 6, according to some embodiments of the present application, the second terminal portions 131b of each wiring assembly 13 are arranged on the side of the box body 11 opposite to the first terminal portions 131a along the first direction X, the second terminal portions 131b are arranged spaced along the first direction X, and adjacent two second terminal portions 131b are arranged staggered along the second direction Y.

[0127] The second terminal portions 131b of each wiring assembly 13 are arranged closer to the second side wall 1112 relative to the first terminal portions 131a along the first direction X.

[0128] The two adjacent second terminal portions 131b are arranged staggered in the second direction Y, which means that one of the two adjacent second terminal portions 131b is partially protruded relative to the other one in the second direction Y.

[0129] The control box 10 provided by an embodiment of the present application is beneficial for the connection between the control module 12 and the external device, and guarantees the on-off requirement between the battery cluster 30 and the external device.

[0130] As shown in FIG. 6, according to some embodiments of the present application, the second connection port 1222 and the fourth connection port 1224 of each control module 12 are respectively connected with the second terminal portion 131b, the box body 11 has the third side wall 1113 and the fourth side wall 1114 arranged oppositely in the second direction Y, the interface of each second terminal portion 131b is arranged towards the fourth side wall 1114, the minimum vertical distance between the second terminal portion 131b connected with the second connection port 1222 and the third side wall 1113 is H1, the minimum vertical distance between the second terminal portion 131b connected with the fourth connection port 1224 and the third side wall 1113 is H2, and the absolute value of the difference between H1 and H2 is greater than zero.

[0131] Since the number of the control modules 12 included in the control box 10 is at least two, the number of the second terminal portions 131b connected with the second connection port 1222 and the number of the second terminal portions 131b connected with the fourth connection port 1224 are both at least two. The second terminal portions 131b connected with the second connection port 1222 of each control module 12 can be arranged along the first direction X, and the second terminal portions 131b connected with the fourth connection port 1224 of each control module 12 can be arranged along the first direction X.

[0132] The absolute value of the difference between H1 and H2 being greater than zero can mean that H1 is greater than H2, and of course, H1 can also be less than H2.

[0133] The control box 10 provided by an embodiment of the present application is beneficial for the layout of the second terminal portions 131b connected with the second connection port 1222 and the second terminal portions 131b connected with the fourth connection port 1224 on the box body 11, and is also beneficial for the arrangement of the external lines connected with each second terminal portion 131b, and guarantees the electrical connection requirement between the external device.

[0134] As shown in FIG. 3 and FIG. 4, according to some embodiments of the present application, the switch assembly 121 includes the first switch 1211 and the second switch 1212, the first switch 1211 is connected with the first connection port 1221 and the second connection port 1222, and the second switch 1212 is connected with the third connection port 1223 and the fourth connection port 1224.

[0135] The first switch 1211 and the second switch 1212 can be independently set from each other, and can be controlled to be turned on or turned off respectively. Of course, the first switch 1211 and the second switch 1212 can also be double-pole switches and can be controlled to be turned on or turned off synchronously.

[0136] Each control module 12 can include a first electrode bus 127 and a second electrode bus 128. The two ends of the first electrode bus 127 can form a first connection port 1221 and a second connection port 1222. The two ends of the second electrode bus 128 can form a third connection port 1223 and a fourth connection port 1224. The first switch 1211 can control the on-off of the first electrode bus 127, thereby controlling the on-off of the first connection port 1221 and the second connection port 1222. The second switch 1212 can control the on-off of the second electrode bus 128, thereby controlling the on-off of the third connection port 1223 and the fourth connection port 1224. One of the first electrode bus 127 and the second electrode bus 128 is a positive electrode bus, and the other is a negative electrode bus.

[0137] The control box 10 provided in an embodiment of the present application can control the on-off between the first connection port 1221 and the second connection port 1222 through the first switch 1211, and control the on-off between the third connection port 1223 and the fourth connection port 1224 through the second switch 1212, thereby ensuring the electrical connection between the battery cluster 30 and external devices through the control module 12, and ensuring the monitoring of the battery cluster 30 and the charging and discharging requirements.

[0138] As shown in FIG. 3 and FIG. 4, according to some embodiments of the present application, optionally, in some embodiments, each control module 12 further includes a pre-charging branch 123 and a third switch 124. The third switch 124 is connected in parallel with the first switch 1211, and the pre-charging branch 123 is connected in parallel with the second switch 1212. The pre-charging branch 123 includes a pre-charging resistor 1231 and a fourth switch 1232 connected in series.

[0139] The third switch 124 can be electrically connected with the connection end 122, and can be electrically connected with the first connection port 1221 and the second connection port 1222.

[0140] The pre-charging branch 123 can be electrically connected with the connection end 122, and can be electrically connected with the third connection port 1223 and the fourth connection port 1224.

[0141] The control box 10 provided by one embodiment of the present application, through the above setting, before the switch assembly 121 is closed to make the first connection port 1221 and the second connection port 1222 conductive and the third connection port 1223 and the fourth connection port 1224 conductive, the third switch 124 and the fourth switch 1232 can be closed first, so that the pre-charging resistor 1231 is connected into the loop first for pre-charging.

[0142] According to some embodiments of the present application, optionally, each control module 12 further comprises a current detector 125, which is configured to detect current information of the loop in which the control module 12 is located.

[0143] The current detector 125 can be a current sensor, an ammeter or any other instrument capable of detecting current information.

[0144] The current detector 125 can be electrically connected with the switch assembly 121 and the connection end 122.

[0145] The control box 10 provided by one embodiment of the present application, through the setting of the current detector 125, can be used to monitor the current value of the loop in which the control module 12 is located, and the safety of the control box 10 can be judged according to the change of the current value, so that the control module 12 can also be used to read the current and the like of the battery cluster 30 during operation.

[0146] As shown in FIG. 3 and FIG. 4, according to some embodiments of the present application, optionally, each control module 12 further comprises a first relay 126, which is configured to control the on-off of the loop in which the control module 12 is located.

[0147] The first relay 126 can be connected between the switch assembly 121 and the connection end 122.

[0148] The control box 10 provided by one embodiment of the present application, through the setting of the first relay 126, is conducive to ensuring the on-off of the loop in which the control module 12 is located.

[0149] As shown in FIG. 7, FIG. 7 is a structural schematic diagram of an energy storage device according to some embodiments of the present application.

[0150] According to some embodiments of the present application, one embodiment of the present application further provides an energy storage device 100, comprising a cabinet 20, a battery cluster 30 and the control box 10 provided by the above embodiments, the cabinet 20 has a receiving cavity 201, and at least two battery clusters 30 are arranged in the receiving cavity 201. Each battery cluster 30 comprises an interface end, each battery cluster 30 is arranged correspondingly with one control module 12, and the interface end of the battery cluster 30 is electrically connected with the connection end 122 of the control module 12 arranged correspondingly.

[0151] The shape of the cabinet 20 is not limited, and can be cylindrical, elliptical cylindrical or polygonal cylindrical. The accommodating cavity 201 can be a whole cavity, and the control box 10 and the battery cluster 30 can be located in the same cavity. Of course, the accommodating cavity 201 can also be divided into multiple separate cavities by a partition. The control box 10 and the battery cluster 30 can be located in the same separate cavity or different separate cavities.

[0152] As shown in FIG. 2, the number of the battery clusters 30 included in the energy storage device 100 can be two. Of course, as shown in FIG. 7, the number of the battery clusters 30 included in the energy storage device 100 can be four. In some embodiments, the number of the battery clusters 30 included in the energy storage device 100 can also be three or more, which can be determined according to the energy density of the energy storage device 100.

[0153] Each battery cluster 30 can include one battery 31 or at least two batteries 31. When the battery cluster 30 includes at least two batteries 31, the batteries 31 can be connected in series, in parallel or in a mixed connection of series and parallel.

[0154] When the battery cluster 30 includes at least two batteries 31, the number of the batteries 31 can be two, three or more, which can be determined according to the capacity of the battery 31 and the required energy density of the energy storage device 100.

[0155] The interface of the battery cluster 30 can include a total positive interface and a total negative interface. When the battery cluster 30 includes one battery 31, the interface of the battery cluster 30 can be the positive and negative interfaces of the battery 31. When the battery cluster 30 includes at least two batteries 31, the interface of the battery cluster 30 can be a total positive interface and a total negative interface formed by the electrical connection of the batteries 31 of the battery cluster 30.

[0156] The number of the control boxes 10 included in the energy storage device 100 can be one as shown in FIG. 2. In this way, the number of the control modules 12 included in the control box 10 can be greater than or equal to the number of the battery clusters 30. Each battery cluster 30 can be electrically connected to the connection end 122 of one control module 12 to control the on-off of the battery cluster 30.

[0157] Of course, as shown in FIG. 7, the number of the control boxes 10 included in the energy storage device 100 can also be n, n is greater than or equal to 2, for example, n = 4. In this case, the number of the control modules 12 included in each control box 10 can be two, three or more, and each battery cluster 30 can be electrically connected to the connection end 122 of one control module 12.

[0158] The control box 10 and the battery cluster 30 can be stacked or separated. The control box 10 can be arranged at one end of the connected battery cluster 30 or clamped between two adjacent battery clusters 30.

[0159] The energy storage device 100 provided by one embodiment of the present application includes the control box 10 and the at least two battery clusters 30 provided by the above embodiments. The cavity of the control box 10 is provided with a plurality of control modules 12, which can be connected to the at least two battery clusters 30 in the energy storage device 100 one by one through different control modules 12. Therefore, it is not necessary to arrange one control box 10 for each battery cluster 30. In the case of the same number of battery clusters 30, the energy storage device 100 provided by one embodiment of the present application can reduce the number of control boxes 10, thereby reducing the volume of the energy storage device 100 and improving the energy density.

[0160] According to some embodiments of the present application, the number of control boxes 10 is multiple, and each battery cluster 30 connected to the at least two control modules 12 of the same control box 10 is stacked in the same direction.

[0161] The number of control boxes 10 can be two, three or more.

[0162] Each battery cluster 30 connected to the at least two control modules 12 of the same control box 10 can be stacked in one of the height direction, width direction or length direction of the cabinet 20.

[0163] Each battery cluster 30 connected to the at least two control modules 12 of the same control box 10 can be understood as at least two battery clusters 30 or all battery clusters 30 connected to all control modules 12 of the same control box 10 are stacked in the same direction.

[0164] The energy storage device 100 provided by one embodiment of the present application can improve the power of the energy storage device 100 and further improve the energy density of the energy storage device 100 under the condition of the same size of the cabinet 20.

[0165] According to some embodiments of the present application, the at least two battery clusters 30 and the control box 10 are stacked in the height direction.

[0166] The height direction can be the same as the second direction Y. The height direction can be the arrangement direction of the base 202 and the top 203 of the energy storage device 100. In use, the base 202 can be used to connect with a support platform to support the energy storage device 100.

[0167] The control box 10 can be located on one side of the battery clusters 30 in the height direction, or can be clamped between any two battery clusters 30.

[0168] The energy storage device 100 provided by one embodiment of the present application is beneficial for the arrangement of the battery clusters 30 connected to each control module 12 of the same control box 10 and the connection and wiring requirements between the battery clusters 30 and the terminals 131 of the corresponding control box 10, while effectively reducing the size of the cabinet 20 and ensuring the energy density of the energy storage device 100.

[0169] According to some embodiments of the present application, the control box 10 is optionally arranged above, in the middle of, or below the at least two battery clusters 30 in the height direction.

[0170] The battery clusters 30 connected to the control box 10 can be two, three, or more.

[0171] The upper side of the at least two battery clusters 30 can be understood as the side of the at least two battery clusters 30 facing the top 203 of the cabinet 20.

[0172] The lower side of the at least two battery clusters 30 can be understood as the side of the at least two battery clusters 30 facing the base 202 of the cabinet 20.

[0173] The middle of the at least two battery clusters 30 can be understood as the control box 10 being clamped between any two battery clusters 30.

[0174] The energy storage device 100 provided by one embodiment of the present application is compact in layout of the battery clusters 30 and the control box 10 in the energy storage device 100, and can shorten the length of the connection lines between the battery clusters 30 and the terminals 131 of the control box 10.

[0175] According to some embodiments of the present application, a power utilization system is also provided, which includes the above-mentioned energy storage device 100. The power utilization system can be, for example, a device or system of a power station.

[0176] According to some embodiments of the present application, referring to FIG. 3 and FIG. 6, one embodiment of the present application provides a control box 10, which includes a square box body 11, two control modules 12 and a wiring assembly 13 arranged one-to-one with the two control modules 12. Each control module 12 is arranged in the box body 11, and the wiring assembly 13 can be arranged on the box wall. Each control module 12 includes a switch assembly 121, a connection end 122 electrically connected with the switch assembly 121, a third switch 124, a pre-charge branch 123, a current detector 125 and a first relay 126. The switch assembly 121 includes a first switch 1211 and a second switch 1212. The connection end 122 includes a first connection port 1221 connected with the first switch 1211, a second connection port 1222 and a third connection port 1223 connected with the second switch 1212, and a fourth connection port 1224. The first switch 1211 is used to control the on-off of the first connection port 1221 and the second connection port 1222. The second switch 1212 is used to control the on-off of the third connection port 1223 and the fourth connection port 1224. The third switch 124 is connected in parallel with the first switch 1211. The pre-charge branch 123 is connected in parallel with the second switch 1212. The pre-charge branch 123 includes a pre-charge resistor 1231 and a fourth switch 1232 arranged in series. The current detector 125 is connected with the first switch 1211 and the first relay 126. The first relay 126 is connected with the second connection port 1222. The box wall can be in a square shell shape as a whole. The box wall includes a first wall surface 111, which can be one of the wall surfaces of the square shell-shaped box wall and can be a plane. The terminals 131 of the wiring assembly 13 are located on the first wall surface 111 and at least partially extend into the box 11 to be connected with the connection end 122. Each terminal 131 includes two first terminal portions 131a and two second terminal portions 131b. One of the two first terminal portions 131a is connected with the first connection port 1221, and the other is connected with the third connection port 1223. One of the two second terminal portions 131b is connected with the second connection port 1222, and the other is connected with the fourth connection port 1224. The two first terminal portions 131a are used to be connected with the interface end of the battery cluster 30. The two second terminal portions 131b are connected with external devices.The first terminal portion 131a of each wiring assembly 13 is arranged on the same side of the box 11 along the first direction X and is spaced apart along the second direction Y, the first direction X is perpendicular to the second direction Y, the box 11 has a first side wall 1111 and a second side wall 1112 arranged oppositely along the first direction X, the first terminal portions 131a are spaced apart along the second direction Y, the interface of each first terminal portion 131a is arranged towards the first side wall 1111 and points from one side to the other side along the second direction Y, the minimum vertical distance of each first terminal portion 131a to the second side wall 1112 gradually decreases along the second direction Y, and the first terminal portion 131a connected to the first connection port 1221 and the first terminal portion 131a connected to the third connection port 1223 are arranged alternately along the second direction Y. The second terminal portion 131b of each wiring assembly 13 is arranged on the side of the box 11 opposite to the first terminal portion 131a along the first direction X, the second terminal portions 131b are spaced apart along the first direction X, and two adjacent second terminal portions 131b are arranged staggered along the second direction Y, the box 11 has a third side wall 1113 and a fourth side wall 1114 arranged oppositely along the second direction Y, the interface of each second terminal portion 131b is arranged towards the fourth side wall 1114, the minimum vertical distance of the second terminal portion 131b connected to the second connection port 1222 to the third side wall 1113 is H1, the minimum vertical distance of the second terminal portion 131b connected to the fourth connection port 1224 to the third side wall 1113 is H2, and the absolute value of the difference between H1 and H2 is greater than zero.

[0177] According to some embodiments of the present application, referring to FIG. 7, one embodiment of the present application provides an energy storage device 100, which includes a square cabinet 20, four battery clusters 30 and two control boxes 10. The control boxes 10 can be the control boxes 10 provided in the above embodiments, which will not be described here again. The cabinet 20 includes a base 202 and a top 203 along the height direction thereof. Each two of the four battery clusters 30 form a group. Each control box 10 includes two control modules 12 and is connected to two battery clusters 30 of the same group in a one-to-one manner. The two battery clusters 30 of the same group are stacked in the height direction of the cabinet 20 with the control boxes 10 connected thereto. The control boxes 10 can be located at one end of the two battery clusters 30 connected thereto in the height direction. Each battery cluster 30 can include four batteries 31, which are stacked in the height direction. The four batteries 31 of the same battery cluster 30 can be connected to one control module 12 of the corresponding control box 10 in series. The two control boxes 10 can be located on the same side of the battery clusters 30 connected thereto. Through the above arrangement, it is not necessary to provide one control box 10 for each battery cluster 30, which reduces the number of control boxes 10 used by the energy storage device 100, effectively reduces the size of the energy storage device 100 in the height direction of the cabinet 20, thereby reducing the volume of the energy storage device 100, improving the energy density thereof, and facilitating the standardized design of the size of the energy storage device 100.

[0178] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to the present application without departing from the scope thereof, and equivalent components can be substituted therefor. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A control box comprising: at least two control modules, each of which is used to control the battery status of the battery cluster, and each of which includes a switch component and a connection terminal electrically connected to the switch component, wherein the switch component is configured to control the connection terminal to be on or off; and A wiring assembly is used to connect the control module with the battery cluster. The wiring assembly is arranged corresponding to the control module. The wiring assembly includes terminals, and the terminals are electrically connected to the connection ends respectively.

2. The control box according to claim 1, wherein: The control box further comprises a box body, the control module is arranged in the box body, and the wiring assembly is arranged on the box body wall.

3. The control box according to claim 2, wherein: The box wall has a first wall surface, and the terminals of each wiring assembly are arranged on the first wall surface.

4. The control box according to claim 2 or 3, wherein: The connection end includes a first connection port, a second connection port, a third connection port, and a fourth connection port connected to the switch component. The switch component is configured to control the on / off of the first connection port and the second connection port and to control the on / off between the third connection port and the fourth connection port. The first connection port and the third connection port are used to connect to the battery cluster, and the second connection port and the fourth connection port are used to connect to an external device.

5. The control box according to claim 4, wherein: The terminal includes a first terminal portion and a second terminal portion. The first terminal portion is used to connect the control module to the battery cluster, and the second terminal portion is used to connect the control module to an external device.

6. The control box according to claim 5, wherein: The first terminal portions of the wiring assemblies are arranged on the same side of the box along a first direction and are spaced apart along a second direction, and the first direction intersects with the second direction.

7. The control box according to claim 6, wherein: The box body has a first side wall and a second side wall arranged opposite to each other in the first direction. The interface of each first terminal part is arranged toward the first side wall. Along the second direction and pointing from one side to the other side, the minimum vertical distance from each first terminal part to the second side wall gradually decreases.

8. The control box according to claim 6 or 7, wherein: The first connection port and the third connection port of each control module are respectively connected to the first terminal portion. Along the second direction, the first terminal portion connected to the first connection port and the first terminal portion connected to the third connection port are alternately arranged.

9. The control box according to any one of claims 6 to 8, wherein: The second terminal portion of each wiring assembly is arranged on a side of the box body opposite to each first terminal portion along the first direction, each second terminal portion is spaced apart along the first direction, and two adjacent second terminal portions are staggered in the second direction.

10. The control box according to claim 9, wherein: The second connection port and the fourth connection port of each control module are respectively connected to the second terminal part, and the box body has a third side wall and a fourth side wall arranged opposite to each other in the second direction. The interface of each second terminal part is arranged toward the fourth side wall. The minimum vertical distance from the second terminal part connected to the second connection port to the third side wall is H1, and the minimum vertical distance from the second terminal part connected to the fourth connection port to the third side wall is H2. The absolute value of the difference between H1 and H2 is greater than zero.

11. The control box according to any one of claims 4 to 10, wherein: The switch assembly includes a first switch and a second switch. The first switch is connected to the first connection port and the second connection port. The second switch is connected to the third connection port and the fourth connection port.

12. The control box according to claim 11, wherein: Each of the control modules further includes a pre-charge branch and a third switch, the third switch is connected in parallel with the first switch, the pre-charge branch is connected in parallel with the second switch, and the pre-charge branch includes a pre-charge resistor and a fourth switch arranged in series.

13. The control box according to any one of claims 1 to 12, wherein: Each of the control modules further includes a current detector, which is used to detect current information of the circuit where the control module is located; And / or, each of the control modules further includes a first relay, and the first relay is used to control the on / off of the circuit where the control module is located.

14. An energy storage device, wherein: include: The cabinet body has a receiving cavity; Battery clusters, at least two of which are disposed in the accommodating cavity, each of which includes an interface terminal; as well as According to the control box according to any one of claims 1 to 13, each battery cluster is correspondingly arranged with one control module, and the interface end of the battery cluster is electrically connected to the connection end of the corresponding control module.

15. The energy storage device according to claim 14, wherein: There are multiple control boxes, and the battery clusters electrically connected to at least two control modules of the same control box are stacked in the same direction.

16. The energy storage device according to claim 14 or 15, wherein: The at least two battery clusters and the control box are stacked in a height direction.

17. The energy storage device according to any one of claims 14 to 16, wherein: The control box is arranged above, in the middle or below the at least two battery clusters in the height direction.

18. An electricity system, wherein: Comprising the energy storage device according to any one of claims 14 to 17.

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