Control box and energy storage device

Abstract

The utility model discloses a control box and an energy storage device, and relates to the technical field of control boxes, and the control box comprises a box body, a weak current loop and a strong current loop. The box body is provided with a containing cavity, and the containing cavity comprises a first containing cavity and a second containing cavity which are separated. The weak-current loop is located in the first accommodating cavity, and the strong-current loop is located in the second accommodating cavity. According to the control box, signal interference between the strong current loop and the weak current loop can be reduced, and the space utilization rate in the containing cavity can be improved.

Description

Technical Field

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

[0002] Existing control boxes usually stack the high-voltage circuit and the low-voltage circuit in the same cavity. To ensure electrical safety, a certain safety distance needs to be set between the components of the high-voltage circuit and the low-voltage circuit. Increasing the distance between components will result in low space utilization of the control box, and compressing the spacing will lead to poor electrical safety. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a control box that can reduce signal interference between a strong current circuit and a weak current circuit while improving space utilization within a receiving cavity.

[0004] The utility model also provides an energy storage device having the control box.

[0005] According to an embodiment of the present invention, the control box includes: a box body having a accommodating cavity, the accommodating cavity including a first accommodating cavity and a second accommodating cavity separated from each other; a weak current circuit, the weak current circuit is located in the first accommodating cavity; and a strong current circuit, the strong current circuit is located in the second accommodating cavity.

[0006] The control box according to the embodiment of the present invention arranges the weak current circuit and the strong current circuit in two separate chambers, thereby isolating the weak current circuit from the strong current circuit, thereby reducing signal interference between the strong current circuit and the weak current circuit. With this reduction in signal interference, the distance between the weak current circuit and the strong current circuit can be conveniently reduced, thereby improving the space utilization within the chamber and facilitating the miniaturization of the control box.

[0007] In some embodiments, the high-voltage circuit includes: a positive circuit, the positive circuit includes a plurality of positive elements arranged along a first direction; a negative circuit, the negative circuit includes a plurality of negative elements arranged along the first direction; wherein the positive circuit and the negative circuit are arranged at intervals along a second direction, and the first direction intersects with the second direction.

[0008] Furthermore, the high-voltage circuit further includes: a pre-charging circuit, which is arranged between the positive circuit and the negative circuit.

[0009] In some embodiments, the plurality of positive electrode components and the plurality of negative electrode components are located on the same mounting surface and correspond one to one, and the corresponding positive electrode components and the negative electrode components are centrally symmetrically arranged on the mounting surface.

[0010] In some embodiments, the box body is provided with an air inlet and an air outlet connected to the second accommodating cavity, and at least one of the air inlet and the air outlet is provided with a driving fan.

[0011] Furthermore, at least one of the air inlet and the air outlet is provided with a dustproof structure, and the dustproof structure includes a grille structure and / or a filter.

[0012] In some embodiments, the control box also includes an air guide baffle, which is arranged in the second accommodating cavity. An air passage is formed between the air guide baffle and the inner wall of the second accommodating cavity. The high-voltage circuit is located in the air passage, and at least one of the air inlet and the air outlet is arranged corresponding to the air passage.

[0013] In some embodiments, the control box further includes: a partition, which separates the accommodating cavity into a first accommodating cavity and a second accommodating cavity, the partition having a first surface and a second surface opposite to each other, the first surface facing the first accommodating cavity, and the second surface facing the second accommodating cavity; the low-current circuit is arranged on the first surface, and the high-current circuit is arranged on the second surface.

[0014] In some embodiments, the control box also includes: an insulation sensor arranged on the second surface, the low-voltage circuit includes an insulation detector arranged on the first surface, the insulation sensor is electrically connected to the insulation detector, and the projection of the insulation sensor on the first surface is located within the projection range of the insulation detector on the first surface.

[0015] In some embodiments, the box body and the partition are insulating members.

[0016] Optionally, the box body and the partition are an integral piece.

[0017] The energy storage device according to the embodiment of the present invention includes a battery module and the control box described in the above embodiment, and the battery module and the control box are electrically connected.

[0018] According to the energy storage device of the embodiment of the present invention, by adopting the control box of the above embodiment, by connecting the weak current circuit and the strong current circuit respectively on both sides of the thickness direction of the partition, the weak current circuit and the strong current circuit are spaced apart, which can reduce the signal interference between the strong current circuit and the weak current circuit, and at the same time reduce the distance between the weak current circuit and the strong current circuit, thereby improving the space utilization rate in the accommodating cavity and facilitating the miniaturization of the control box.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 This is an exploded structural diagram of a control box according to an embodiment of the present utility model;

[0022] Figure 2 for Figure 1 A schematic structural diagram of a control box of the illustrated embodiment;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the control box on one side of the first accommodating cavity according to an embodiment of the present utility model;

[0024] Figure 4 This is a structural diagram of the control box on one side of the first accommodating cavity according to an embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the control box on one side of the second accommodating cavity according to an embodiment of the present utility model;

[0026] Figure 6 This is a schematic structural diagram of the control box on one side of the second accommodating cavity according to an embodiment of the present utility model;

[0027] Figure 7 Schematic diagram of the air guide plate and heat dissipation direction of the control box according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] Control box 100,

[0030] Box 10,

[0031] Accommodation chamber 11, first accommodation chamber 111, second accommodation chamber 112,

[0032] Air inlet 12, air outlet 13, grille structure 14,

[0033] Partition 20, first surface 21, second surface 22, wiring hole 23,

[0034] Weak current circuit 30, insulation detector 31, insulation sensor 32, high voltage sampler 33, control unit 34,

[0035] Strong current circuit 40,

[0036] Positive circuit 41, positive main contactor 411, positive current detector 412, positive fuse 413, positive copper bus 414, positive plug 415,

[0037] Negative electrode circuit 42, negative electrode main contactor 421, negative electrode current detector 422, negative electrode fuse 423, negative electrode copper bus 424, negative electrode plug 425,

[0038] Pre-charge circuit 43,

[0039] Wind guide baffle 50, wind passage 51, wind outlet 52,

[0040] Magnetic ring 60 , first cover plate 71 , second cover plate 72 . DETAILED DESCRIPTION

[0041] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "width", "thickness", "up", "down", "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0044] The control box 100 and the energy storage device according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0045] like Figures 1-6As shown, a control box 100 according to an embodiment of the present invention includes: a box body 10, a weak current circuit 30, and a strong current circuit 40. The box body 10 has a receiving chamber 11, which includes a first receiving chamber 111 and a second receiving chamber 112. The weak current circuit 30 is located in the first receiving chamber 111, and the strong current circuit 40 is located in the second receiving chamber 112.

[0046] It is understandable that the high-current circuit 40 is likely to generate an electromagnetic field in the surrounding area when energized, and this electromagnetic field is likely to cause signal interference to the weak-current circuit 30 and its connecting wiring harness, affecting the operating stability of the weak-current circuit 30. In order to reduce the signal interference of the high-current circuit 40 on the weak-current circuit 30, it is necessary to increase the distance between the weak-current circuit 30 and the high-current circuit 40, resulting in a decrease in the space utilization within the control box 100 and an increase in the volume of the control box 100.

[0047] By placing the weak-current circuit 30 and the strong-current circuit 40 in separate first and second accommodating cavities 111, 112, the strong-current circuit 40 is separated from the weak-current circuit 30. The partition wall between the first and second accommodating cavities 111, 112 can isolate the electromagnetic field, thereby reducing or preventing electromagnetic interference from the strong-current circuit 40 on the weak-current circuit 30. At the same time, the intersection of the connecting wire harnesses of the weak-current circuit 30 and the connecting wire harnesses of the strong-current circuit 40 is reduced or avoided, further reducing or preventing electromagnetic interference from the strong-current circuit 40 on the weak-current circuit 30, and improving the operating stability of the strong-current circuit 40 and the weak-current circuit 30.

[0048] In addition, since the electromagnetic fields between the weak-current circuit 30 and the strong-current circuit 40 can be separated after they are distributed in this way, even if the weak-current circuit 30 and the strong-current circuit 40 are arranged close to each other, their respective functions will not be affected. Therefore, the weak-current circuit 30 and the strong-current circuit 40 can be arranged closely, that is, the distance between the weak-current circuit 30 and the strong-current circuit 40 can be appropriately reduced, which is beneficial to improving the space utilization in the accommodating cavity 11 and is beneficial to the miniaturization of the control box 100.

[0049] In addition, the weak current circuit 30 and the strong current circuit 40 are placed in different cavities, which reduces the amount of wiring harness crossover between the two, making it easier to install or repair the weak current circuit 30 or the strong current circuit 40 separately.

[0050] Therefore, the control box 100 of the present application arranges the weak-current circuit 30 and the strong-current circuit 40 in different cavities respectively, so that the weak-current circuit 30 and the strong-current circuit 40 are spaced apart, which can reduce the signal interference between the strong-current circuit 40 and the weak-current circuit 30, and at the same time reduce the distance between the weak-current circuit 30 and the strong-current circuit 40, thereby improving the space utilization in the accommodating cavity 11, which is conducive to the miniaturization of the control box 100.

[0051] Here, the control box 100 can be a common electric control box or a high-voltage control box.

[0052] In some embodiments, the control box 100 further includes a partition 20, which divides the accommodating chamber 11 into a first accommodating chamber 111 and a second accommodating chamber 112. In this way, the first accommodating chamber 111 and the second accommodating chamber 112 are obtained in a very simple manner.

[0053] Specifically, the partition 20 has a first surface 21 and a second surface 22 facing each other. The first surface 21 faces the first accommodating cavity 111, and the second surface 22 faces the second accommodating cavity 112. The weak current circuit 30 is provided on the first surface 21, and the strong current circuit 40 is provided on the second surface 22. In other words, the strong current circuit 40 and the weak current circuit 30 are spaced apart and arranged on both sides of the thickness direction of the partition 20. In this way, the distance between the strong current circuit 40 and the weak current circuit 30 is almost only the thickness of the partition 20. The small distance is more conducive to improving the space utilization within the accommodating cavity 11 and facilitating the miniaturization of the control box 100.

[0054] In this application, there is no limitation on the materials of the housing 10 and the partition 20. For example, the housing 10 and the partition 20 may be made of plastic insulation, which can improve their insulation performance, enhance the electrical safety of the control box 100, and contribute to the lightweighting of the control box 100. For another example, the housing 10 may be made of metal, which can enhance the structural strength of the housing 10.

[0055] Preferably, the partition 20 is a magnetic shielding member, which can further reduce signal interference between the high-voltage circuit 40 and the low-voltage circuit 30 .

[0056] Preferably, the volume of the first accommodating chamber 111 is larger than the volume of the second accommodating chamber 112. It is understandable that the heat generated by the weak current circuit 30 is lower than the heat generated by the strong current circuit 40. The larger volume of the second accommodating chamber 112 can improve the heat dissipation efficiency of the strong current circuit 40, while the smaller volume of the first accommodating chamber 111 can improve the space utilization of the accommodating chamber 11.

[0057] In some embodiments, as Figure 4 、 Figure 7 As shown, the partition plate 20 is provided with a wiring hole 23 penetrating along the thickness direction.

[0058] Therefore, when wiring electrical connection is required between the components of the weak current circuit 30 and the components of the strong current circuit 40, the conductive wire bundle can pass through the wiring hole 23 to be electrically connected to the weak current circuit 30 and the strong current circuit 40, thereby meeting the electrical connection requirements between the weak current circuit 30 and the strong current circuit 40.

[0059] It should be noted that the wiring holes 23 can be set at different positions of the partition 20 according to the layout of the weak current circuit 30 on the first surface 21, the layout of the strong current circuit 40 on the second surface 22, and the electrical connection requirements between the weak current circuit 30 and the strong current circuit 40.

[0060] In some embodiments, as Figure 6 As shown, the high-voltage circuit 40 includes a positive circuit 41 and a negative circuit 42. The positive circuit 41 includes a plurality of positive components arranged along a first direction, and the negative circuit 42 includes a plurality of negative components arranged along the first direction.

[0061] The positive and negative electrode loops 41 and 42 are arranged in a spaced relationship along the second direction, and the first and second directions intersect. In other words, the direction in which the positive and negative electrode loops 41 and 42 are arranged is not parallel to the direction in which the plurality of positive electrode components are arranged. The direction in which the positive and negative electrode loops 41 and 42 are arranged is not parallel to the direction in which the plurality of negative electrode components are arranged.

[0062] For example, Figure 6 In the illustrated example, the first direction is the length of the control box 100, and the second direction is the width of the control box 100. The positive circuit 41 includes a plurality of positive electrode components arranged along the length of the control box 100, and the negative circuit 42 includes a plurality of negative electrode components arranged along the length of the control box 100. The positive circuit 41 and the negative circuit 42 are arranged in a spaced relationship along the width of the control box 100.

[0063] It is understandable that electrical connectors need to be provided between the positive electrode components or between the negative electrode components to achieve electrical conduction between the positive electrode components or between the negative electrode components.

[0064] Thus, the positive electrode elements and the negative electrode elements are arranged along the first direction, which can simplify the layout of the positive electrode loop 41 and the negative electrode loop 42, and the positive electrode copper busbar 414 between multiple positive electrode elements and the negative electrode copper busbar 424 between multiple negative electrode elements can also be arranged along the first direction, which can simplify the structure of the positive electrode copper busbar 414 and the negative electrode copper busbar 424, reduce the installation difficulty and reduce the manufacturing cost of the positive electrode copper busbar 414 and the negative electrode copper busbar 424.

[0065] At the same time, the positive electrode loop 41 and the negative electrode loop 42 are arranged at intervals along the second direction, which can reduce or avoid the intersection of the positive electrode loop 41 and the negative electrode loop 42, simplify the layout of the high-voltage circuit 40 and reduce the crosstalk between the positive electrode loop 41 and the negative electrode loop 42, thereby improving the electrical safety of the high-voltage circuit 40.

[0066] In addition, when a ventilation device is provided in the second accommodating cavity 112, the positive electrode loop 41 and the negative electrode loop 42 can block the airflow in the second accommodating cavity 112, so that the airflow can flow along the first direction under the obstruction of the positive electrode loop 41 and the negative electrode loop 42, that is, a heat dissipation duct is formed between the positive electrode loop 41 and the negative electrode loop 42, thereby achieving heat dissipation of the positive electrode loop 41 and the negative electrode loop 42.

[0067] In this application, there is no limitation on the types and connection relationships of the positive and negative electrode components. Figure 6 In the example, the multiple positive electrode elements include a positive electrode main contactor 411, a positive electrode current detector 412 and a positive electrode fuse 413 arranged in sequence along the first direction; the multiple negative electrode elements include a negative electrode fuse 423, a negative electrode current detector 422 and a negative electrode main contactor 421 arranged in sequence along the first direction.

[0068] Preferably, the positive copper busbar 414 and the negative copper busbar 424 are in the shape of long strips extending along the first direction.

[0069] Preferably, the first direction is perpendicular to the second direction, so that the distance between each position of the positive circuit 41 and the negative circuit 42 remains stable, further simplifying the layout of the positive circuit 41 and the negative circuit 42, and facilitating the installation or maintenance of the positive circuit 41 and the negative circuit 42.

[0070] Furthermore, the positive circuit 41 also includes a positive plug 415, which is located at both ends of the positive circuit 41 along the first direction. One end of the positive plug 415 extends to the outside of the box 10, and the other end is electrically connected to the positive element inside the box 10, so that the positive circuit 41 is electrically connected to the external circuit of the box 10 through the positive plug 415.

[0071] At the same time, the negative electrode loop 42 also includes a negative electrode plug 425, which is located at both ends of the negative electrode loop 42 along the first direction. One end of the negative electrode plug 425 extends to the outside of the box 10, and the other end is electrically connected to the positive electrode element inside the box 10, so that the negative electrode loop 42 is electrically connected to the external circuit of the box 10 through the negative electrode plug 425.

[0072] Furthermore, if Figure 6 As shown, the high-voltage circuit 40 further includes a pre-filling circuit 43, which is arranged between the positive circuit 41 and the negative circuit 42. This increases the distance between the positive circuit 41 and the negative circuit 42, further improving the electrical safety of the high-voltage circuit 40. At the same time, the pre-filling circuit 43 is arranged in the gap between the positive circuit 41 and the negative circuit 42, which can improve the space utilization rate within the second accommodating chamber 112.

[0073] In the present application, there is no limitation on the structure of the pre-charge circuit 43. For example, the pre-charge circuit 43 includes a pre-charge resistor.

[0074] In some embodiments, multiple positive electrode components and multiple negative electrode components are located on the same mounting surface and correspond one-to-one, and the corresponding positive electrode components and negative electrode components are arranged centrally and symmetrically on the mounting surface. For example, the mounting surface is second surface 22, and the number of positive electrode components and negative electrode components is equal, and each positive electrode component has a negative electrode component at a centrally and symmetrical position on second surface 22.

[0075] It is understandable that different types of positive electrode components or negative electrode components generate different amounts of heat.

[0076] Therefore, by arranging the corresponding positive electrode elements and negative electrode elements in a centrally symmetrical manner on the second surface 22, the positive electrode elements and negative electrode elements with higher heat generation are arranged in a centrally symmetrical manner on the second surface 22, and the distance between the positive electrode elements and the negative electrode elements with higher heat generation can be increased, thereby reducing or avoiding the local excessive temperature of the high-voltage circuit 40 on the second surface 22, and making the heat distribution in the high-voltage circuit 40 more uniform.

[0077] Preferably, the positive electrode element with high heat generation is arranged at one end of the positive electrode loop 41 along the first direction, and the negative electrode element with high heat generation in the negative electrode loop 42 is arranged symmetrically with the center of the above-mentioned positive electrode element on the second surface 22, so as to increase the distance between the positive electrode element with high heat generation and the negative electrode element, thereby avoiding reducing the heat concentration in the high-voltage circuit 40.

[0078] In this application, the type and arrangement order of the positive electrode components or negative electrode components are not limited. Figure 6 In the example, multiple positive electrode components are sequentially arranged from right to left along the first direction, namely, a positive electrode main contactor 411, a positive electrode current detector 412, and a positive electrode fuse 413; multiple negative electrode components are sequentially arranged from right to left along the first direction, namely, a negative electrode fuse 423, a negative electrode current detector 422, and a negative electrode main contactor 421.

[0079] In some embodiments, the box body 10 is provided with an air inlet 12 and an air outlet 13 communicating with the second accommodating cavity 112 , and at least one of the air inlet 12 and the air outlet 13 is provided with a driving fan.

[0080] Thus, the fan can be driven to drive air into and through the second accommodating chamber 112 and then out of the second accommodating chamber 112 , so as to achieve heat dissipation for the high-voltage circuit 40 .

[0081] Furthermore, at least one of the air inlet 12 and the air outlet 13 is provided with a dustproof structure, and the dustproof structure includes a grille structure 14 or a filter, or both the grille structure 14 and the filter are provided.

[0082] In this way, the grille structure 14 and the filter can reduce or avoid blocking impurities (such as larger stones) from entering the second accommodating chamber 112 through the air inlet 12 or the air outlet 13, thereby avoiding or reducing the risk of impurities entering the second accommodating chamber 112 and causing damage to the high-voltage circuit 40, or causing a short circuit in the high-voltage circuit 40, thereby improving the electrical safety of the high-voltage circuit 40.

[0083] In some embodiments, the control box 100 also includes an air guide baffle 50, which is arranged in the second accommodating cavity 112. An air passage 51 is formed between the air guide baffle 50 and the inner wall of the second accommodating cavity 112. The high-voltage circuit 40 is located in the air passage 51, and at least one of the air inlet 12 and the air outlet 13 is arranged corresponding to the air passage 51.

[0084] Therefore, the wind guide baffle 50 can limit the flow direction of the airflow in the second accommodating chamber 112, so that the airflow flows in the air passage 51, the flow of the airflow is more concentrated, and the flow efficiency of the airflow in the second accommodating chamber 112 is improved, reducing or avoiding the generation of air flow loops, improving the heat dissipation effect of the high-voltage circuit 40, reducing the temperature of the high-voltage circuit 40, and making the temperature between the various components of the high-voltage circuit 40 more uniform.

[0085] exist Figure 7 The example in FIG. 5 shows an air passage 51 defined by an air guide baffle 50 in the second accommodating chamber 112 and the direction of airflow. The air guide baffle 50 is provided with an air outlet 52, through which air flows through the air guide baffle 50. After entering the second accommodating chamber 112 through the air inlet 12, the airflow follows the air passage 51, sequentially passing through the air outlets 52 of the air guide baffle 50, and ultimately exiting the second accommodating chamber 112 through the air outlet 13.

[0086] In some embodiments, as Figure 4 、 Figure 6 As shown, the control box 100 further includes: an insulation sensor 32 provided on the second surface 22 , the weak current circuit 30 includes an insulation detector 31 provided on the first surface 21 , and the insulation sensor 32 is electrically connected to the insulation detector 31 .

[0087] Therefore, the insulation sensor 32 is used to detect whether leakage occurs in the high-voltage circuit 40 , so as to improve the electrical safety of the control box 100 .

[0088] At the same time, the projection of the insulation sensor 32 on the first surface 21 is located within the projection range of the insulation detector 31 on the first surface 21, so that the insulation sensor 32 can be directly electrically connected to the insulation detector 31 through the through partition 20, which can shorten the electrical connection distance between the insulation sensor 32 and the insulation detector 31.

[0089] In this application, there is no limitation on the type and arrangement of components in the weak current circuit 30. For example, Figure 4 In the example, the weak current circuit 30 includes an insulation detector 31, a high voltage sampler 33 and a control unit 3434.

[0090] In some embodiments, the box body 10 and the partition 20 are insulating parts, for example, the box body 10 and the partition 20 are plastic parts.

[0091] Thus, the connection firmness between the partition 20 and the box body 10 can be improved, thereby improving the stability of the strong current circuit 40 and the weak current circuit 30 connected to the partition 20, and further improving the electrical safety of the strong current circuit 40 and the weak current circuit 30.

[0092] Optionally, the box body 10 and the partition 20 are integrated, thereby improving the positional stability of the partition 20 on the box body 10 and further ensuring the electrical safety of the high-voltage circuit 40 and the low-voltage circuit 30.

[0093] In some embodiments, as Figure 4 As shown, the control box 100 further includes a magnetic ring 60 disposed on the first surface 21 . The magnetic ring 60 can be used to improve the anti-signal interference capability of the wiring harness in the weak current circuit 30 , thereby improving the signal stability of the weak current circuit 30 .

[0094] In some embodiments, as Figure 1 、 Figure 3 As shown, the control box 100 further includes a first cover plate 71 and a second cover plate 72. The first cover plate 71, the box body 10 and the partition plate 20 enclose a first accommodating cavity 111, and the second cover plate 72, the box body 10 and the partition plate 20 enclose a second accommodating cavity 112.

[0095] In this application, the materials of the first and second cover plates 71, 72 are not limited. For example, the first and second cover plates 71, 72 may be insulating components, which can improve their insulation performance, enhance the electrical safety of the control box 100, and contribute to the lightweighting of the control box 100. Alternatively, the first and second cover plates 71, 72 may be plastic. For another example, the first and second cover plates 71, 72 may be metal components, which can further enhance the structural strength of the box body 10.

[0096] Furthermore, seals are provided between the first cover plate 71 and the box body 10 and between the second cover plate 72 and the box body 10, thereby improving the sealing between the first cover plate 71 and the box body 10 and between the second cover plate 72 and the box body 10, reducing or preventing liquid from entering the accommodating cavity 11, and improving the electrical safety of the control box 100.

[0097] In the present application, there is no limitation on the manner in which the first cover plate 71 and the second cover plate 72 are connected to the box body 10 .

[0098] In some implementations, a bracket mounting position is provided on the outer circumference of the box body 10 , and the bracket mounting position is used to connect to an external fixing structure so that the box body 10 can be fixed in different installation environments.

[0099] The energy storage device according to the embodiment of the present invention includes a battery module and the control box 100 of the above embodiment, and the battery module and the control box 100 are electrically connected.

[0100] The energy storage device of the present application adopts the control box 100 of the above-mentioned embodiment, and connects the weak-current circuit 30 and the strong-current circuit 40 to the two sides of the thickness direction of the partition 20 respectively, so that the weak-current circuit 30 and the strong-current circuit 40 are spaced apart. This can reduce the signal interference between the strong-current circuit 40 and the weak-current circuit 30, and at the same time reduce the distance between the weak-current circuit 30 and the strong-current circuit 40, thereby improving the space utilization rate in the accommodating cavity 11, which is conducive to the miniaturization of the control box 100.

[0101] Other structures and operations of the control box 100 and the energy storage device according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0102] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0103] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A control box, characterized in that: include: A box body, the box body having a accommodating cavity, the accommodating cavity including a first accommodating cavity and a second accommodating cavity separated from each other; A weak current circuit, the weak current circuit being located in the first accommodating cavity; A strong electric circuit is located in the second accommodating cavity.

2. The control box according to claim 1, characterized in that: The strong electric circuit includes: A positive electrode circuit, the positive electrode circuit comprising a plurality of positive electrode elements arranged along a first direction; a negative electrode circuit, the negative electrode circuit comprising a plurality of negative electrode elements arranged along the first direction; The positive electrode loop and the negative electrode loop are arranged at intervals along a second direction, and the first direction intersects with the second direction.

3. The control box according to claim 2, characterized in that: The high-voltage circuit further includes a pre-charging circuit, which is arranged between the positive electrode circuit and the negative electrode circuit.

4. The control box according to claim 2, characterized in that: The plurality of positive electrode components and the plurality of negative electrode components are located on the same mounting surface and correspond one to one, and the corresponding positive electrode components and the negative electrode components are centrally symmetrically arranged on the mounting surface.

5. The control box according to claim 1, characterized in that: The box body is provided with an air inlet and an air outlet communicating with the second accommodating cavity, and at least one of the air inlet and the air outlet is provided with a driving fan.

6. The control box according to claim 5, characterized in that: At least one of the air inlet and the air outlet is provided with a dustproof structure, and the dustproof structure includes a grille structure and / or a filter.

7. The control box according to claim 5, characterized in that: It also includes an air guide baffle, which is arranged in the second accommodating cavity. An air passage is formed between the air guide baffle and the inner wall of the second accommodating cavity. The high-voltage circuit is located in the air passage, and at least one of the air inlet and the air outlet is arranged corresponding to the air passage.

8. The control box according to any one of claims 1 to 7, characterized in that: Also includes: a partition, the partition dividing the accommodating chamber into a first accommodating chamber and a second accommodating chamber, the partition having a first surface and a second surface facing each other, the first surface facing the first accommodating chamber, and the second surface facing the second accommodating chamber; The weak current circuit is arranged on the first surface, and the strong current circuit is arranged on the second surface.

9. The control box according to claim 8, characterized in that: Also includes: An insulation sensor is arranged on the second surface, the weak current circuit includes an insulation detector arranged on the first surface, the insulation sensor is electrically connected to the insulation detector, and the projection of the insulation sensor on the first surface is located within the projection range of the insulation detector on the first surface.

10. The control box according to claim 8, characterized in that: The box body and the partition are insulating parts.

11. The control box according to claim 8, characterized in that: The box body and the partition are an integral part.

12. An energy storage device, characterized in that: It comprises a battery module and a control box as described in any one of claims 1 to 11, wherein the battery module and the control box are electrically connected.

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