High-voltage box of battery cabinet and battery cabinet

Abstract

The invention discloses a high-voltage box of a battery cabinet and the battery cabinet, the high-voltage box comprises a shell, and the shell is provided with an accommodating cavity; the first input terminal and the second input terminal are arranged in the shell; the first output terminal and the second output terminal are arranged on the shell; the first conductive piece and the second conductive piece are arranged in the accommodating cavity, the first conductive piece is connected with the first input terminal and the first output terminal, and the second conductive piece is connected with the second input terminal and the second output terminal; the leakage current sensor is arranged in the containing cavity and provided with a through hole, the first conductive part and the second conductive part both penetrate through the through hole, the first conductive part and the second conductive part are arranged in the through hole in the first direction, the first direction is perpendicular to the axis of the through hole, and the leakage current sensor is provided with a reference face. The distance between the part, contained in the through hole, of the first conductive part and the reference surface in the first direction is d1, the distance between the part, contained in the through hole, of the second conductive part and the reference surface in the first direction is d2, and d1 / d2 is larger than or equal to 0.95 and smaller than or equal to 1.05.

Description

Technical Field

[0001] This application relates to the field of energy storage, and in particular to a high-voltage box and a battery cabinet for a battery cabinet. Background Technology

[0002] Against the backdrop of increased global support for the development of new energy technologies, various energy storage-related technologies have been widely applied. The development of energy storage equipment requires simultaneous consideration of multiple design factors, such as heat dissipation performance, cycle life, and cost, as well as the safety performance of the energy storage equipment.

[0003] After the battery modules and high-voltage boxes of the energy storage battery cabinet are assembled, leakage current in the battery modules will affect the safety performance of the energy storage battery cabinet. Summary of the Invention

[0004] This application provides a high-voltage box and a battery cabinet for a battery cabinet, which helps to improve the safety performance of the battery cabinet.

[0005] In a first aspect, this application provides a high-voltage box for a battery cabinet. The high-voltage box includes a housing, a first input terminal and a second input terminal, a first output terminal and a second output terminal, a first conductive element and a second conductive element, and a leakage current sensor. The housing has a receiving cavity. The first input terminal and the second input terminal are disposed in the housing, one of which is used to connect to the positive terminal of the battery module in the battery cabinet, and the other is used to connect to the negative terminal of the battery module. The first output terminal and the second output terminal are disposed in the housing. The first conductive element and the second conductive element are disposed in the receiving cavity, the first conductive element connecting the first input terminal and the first output terminal, and the second conductive element connecting the second input terminal and the second output terminal. A leakage current sensor is disposed in the receiving cavity. The leakage current sensor has a through hole. A first conductive element and a second conductive element are both disposed in the through hole. The first conductive element and the second conductive element are arranged along a first direction in the through hole. The first direction is perpendicular to the axis of the through hole. The leakage current sensor has a reference surface perpendicular to the first direction and passing through the axis. The distance between the portion of the first conductive element housed in the through hole and the reference surface along the first direction is d1. The distance between the portion of the second conductive element housed in the through hole and the reference surface along the first direction is d2. 0.95≤d1 / d2≤1.05.

[0006] The high-voltage box of this application incorporates a leakage current sensor installed within its housing. This sensor monitors the current in the battery cabinet circuit in real time and takes timely measures when the leakage current exceeds a set threshold. The built-in leakage current sensor is physically protected by the housing, reducing external environmental corrosion and interference, thus improving its accuracy and extending its lifespan. Setting d1 / d2 ensures that the first and second conductive elements within the through-hole are located on opposite sides of the through-hole's center and are approximately symmetrically positioned, reducing structural interference and improving the sensitivity and accuracy of leakage current detection.

[0007] In one or more of the above optional embodiments, the portion of the first conductive element housed in the through-hole and the portion of the second conductive element housed in the through-hole are symmetrical about a reference plane. The portions of the first conductive element housed in the through-hole and the portions of the second conductive element housed in the through-hole are parallel within the through-hole to improve the detection accuracy of the leakage current sensor.

[0008] In one or more of the above optional embodiments, the minimum distance d3 between the first conductive element and the wall of the through hole is greater than or equal to 7 mm. This can increase the electrical clearance between the first conductive element and the wall of the through hole, reduce the risk of discharge, and improve safety and reliability.

[0009] In one or more of the above optional embodiments, the minimum distance d4 between the second conductive element and the wall of the through hole is greater than or equal to 7 mm. This can increase the electrical clearance between the second conductive element and the wall of the through hole, reduce the risk of discharge, and improve safety and reliability.

[0010] In one or more of the above optional embodiments, the first conductive element includes a first main body and a first bent portion. The first main body is disposed through a through hole, and the first bent portion is connected to the first main body and bent relative to the first main body. In a second direction, the minimum distance L1 between the first bent portion and the leakage current sensor is greater than or equal to 15 mm, and the second direction is parallel to the axis. The magnetic field generated when current flows through the first bent portion may cause additional interference to the magnetic field generated when current flows through the first main body and the leakage current sensor. By limiting the minimum distance L1 between the first bent portion and the leakage current sensor, the impact of the first bent portion on the leakage current detection accuracy is reduced.

[0011] In one or more of the above optional embodiments, the first bent portion is connected to the end of the first main body portion along a third direction and bends toward the side of the first main body portion away from the second conductive member, with the third direction perpendicular to the first direction and the axis. Bending the first bent portion to a plane perpendicular to the first main body portion adjusts the connection end face of the first conductive member and the first output terminal to a horizontal direction, facilitating their assembly connection. The first bent portion bends away from the second conductive member, reducing spatial interference with the second conductive member.

[0012] In one or more of the above optional embodiments, the first conductive element includes a first connecting portion, a first bending portion connecting the first main body portion and the first connecting portion, the angle between the first connecting portion and the first main body portion being 85° to 95°, and the first connecting portion being connected to the first output terminal. By providing the first connecting portion and the first bending portion, the overall structure of the first conductive element can be better adapted to the first output terminal, increasing the connection stability between the first conductive element and the first output terminal and reducing the risk of deformation or damage during assembly of the first output terminal.

[0013] In one or more of the above optional embodiments, the housing includes a first mounting plate. The first output terminal includes a first conductive portion and a second conductive portion. The first conductive portion and a first connecting portion are stacked and connected along a third direction. The first conductive portion passes through the first mounting plate. The second conductive portion is connected to the first conductive portion and located on the side of the first mounting plate away from the leakage current sensor. The second conductive portion is bent relative to the first conductive portion, and the third direction is perpendicular to the first direction and the axis. The bending of the second conductive portion relative to the first conductive portion, and the two portions respectively connected to the first mounting plate and the first conductive element, allow the second conductive portion and the first conductive portion to support each other and jointly distribute stress.

[0014] In one or more of the above optional embodiments, the second conductive element includes a second main body and a second bent portion. The second main body is disposed through a through hole, and the second bent portion is connected to the end of the second main body along a second direction and bends towards the side of the second main body away from the first conductive element. The second direction is parallel to the axis. In the second direction, the minimum distance L2 between the second bent portion and the leakage current sensor is greater than or equal to 15 mm. The magnetic field generated when current flows through the second bent portion may cause additional interference to the magnetic field generated when current flows through the second main body and the leakage current sensor. By limiting the minimum distance L2 between the second bent portion and the leakage current sensor, the impact of the second bent portion on the leakage current detection accuracy is reduced.

[0015] In one or more of the above optional embodiments, the housing includes a second mounting plate and a third mounting plate. The second mounting plate is disposed on one side of the leakage current sensor along the first direction, and the third mounting plate is disposed on one side of the leakage current sensor along a third direction, which is perpendicular to the first direction and the axis. The leakage current sensor includes a bracket and a detection element housed within the bracket. The bracket has a through hole. The bracket includes a first fixing part and a second fixing part. The first fixing part is fixed to the second mounting plate, and the second fixing part is fixed to the third mounting plate. By fixing the leakage current sensor to the bracket in multiple directions and at multiple points, the overall anti-shake capability of the leakage current sensor is improved, and problems such as loosening and locking failure are mitigated.

[0016] In one or more of the above optional embodiments, the bracket includes a plurality of second fixing parts, which are respectively disposed on both sides of the bracket along the second direction. The second fixing part located on one side of the bracket along the first direction has an oblong hole, and the second fixing part located on the other side of the bracket along the first direction has a circular hole. The oblong hole and the circular hole cooperate to enable the bracket and the third mounting plate to have high assembly accuracy. The oblong hole can absorb assembly tolerances and improve assembly efficiency.

[0017] In one or more of the above optional embodiments, the first fixing part is disposed on one side of the bracket along a third direction. The high-voltage box includes a connector, which is connected to the first fixing part and the second mounting plate. The first fixing part and the second mounting plate are connected by a connector, which simplifies the connection method; at the same time, the connection between the bracket and the second mounting plate is also more stable.

[0018] In one or more of the above optional embodiments, the high-voltage box includes at least one electrical component, which is connected to the first conductive element and the first input terminal. The electrical component is located upstream of the leakage current sensor and is capable of monitoring leakage current caused by a fault in the electrical component in the circuit, thereby covering a larger range of leakage current monitoring.

[0019] Secondly, this application provides a battery cabinet, which includes a battery module and the aforementioned high-voltage box. The high-voltage box is electrically connected to the positive and negative terminals of the battery module via a first input terminal and a second input terminal. It is used to monitor the leakage current of the battery module and to take timely measures to improve the safety performance and service life of the battery cabinet. Attached Figure Description

[0020] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the high-voltage box provided in some embodiments of this application;

[0022] Figure 2 This is a partial structural schematic diagram of a high-voltage box provided in some embodiments of this application;

[0023] Figure 3 A partial cross-sectional view of a high-voltage box provided in some embodiments of this application;

[0024] Figure 4 A partial structural schematic diagram of a high-voltage box from another angle, provided for some embodiments of this application;

[0025] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure at point AA;

[0026] Figure 6 A top view of a high-voltage box provided in some embodiments of this application;

[0027] Figure 7 A schematic diagram of the structure of the first conductive element, the second conductive element, and the leakage current sensor of the high-voltage box provided in some embodiments of this application;

[0028] Figure 8 A partial top view of a high-voltage box provided in some embodiments of this application;

[0029] Figure 9 A schematic diagram of the structure of the first output terminal of the high-voltage box provided in some embodiments of this application;

[0030] Figure 10 This is a partial structural schematic diagram of a battery cabinet provided in some embodiments of this application.

[0031] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0032] 1. High-voltage box; 10. Housing; 11. Receiving cavity; 12. First mounting plate; 13. Second mounting plate; 14. Third mounting plate; 15. Top wall; 16. Bottom wall; 17. First wall; 18. Second wall; 20. First input terminal; 30. Second input terminal; 40. First output terminal; 41. First conductive part; 411. First hole; 42. Second conductive part; 421. Second hole; 43. Third conductive part; 50. Second output terminal; 60. First conductive element; 61. First main body; 62. 63. First bending part; 70. First connecting part; 71. Second conductive part; 72. Second main body part; 73. Second bending part; 74. Third bending part; 75. Third connecting part; 80. Leakage current sensor; 81. Through hole; 82. Bracket; 83. Detection element; 84. First fixing part; 85. Second fixing part; 86. Waist-shaped hole; 87. Circular hole; 90. Connector; 100. Electrical component; 2. Battery module; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0034] The terms "first," "second," "third," etc., used in the specification, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments.

[0035] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0036] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In the embodiments of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 85°-95°, the two directions can be considered perpendicular; if the angle between two directions is 0°-10°, the two directions can be considered parallel.

[0038] The energy storage device of this application is described below with reference to the accompanying drawings.

[0039] Reference Figures 1 to 5 As shown, this application embodiment provides a high-voltage box 1 for a battery cabinet. The high-voltage box 1 includes a housing 10, and the housing 10 has a receiving cavity 11.

[0040] The housing 10 is a component that forms the internal cavity 11 of the high-pressure box 1.

[0041] The structure of the shell 10 includes cylinders, cuboids, prisms, or other relatively regular structures.

[0042] The material of the housing 10 includes, but is not limited to, copper, iron, aluminum, steel, aluminum alloy or plastic.

[0043] In some examples, the housing 10 is generally rectangular, with a predetermined length and width. The width direction of the housing 10 is parallel to the first direction X.

[0044] For example, the housing 10 includes a top wall 15 and a bottom wall 16, with a receiving cavity 11 located between the top wall 15 and the bottom wall 16.

[0045] The accommodating cavity 11 is a relatively enclosed space.

[0046] Reference Figure 2 and Figure 5 As shown, the high-voltage box 1 includes a first input terminal 20 and a second input terminal 30. The first input terminal 20 and the second input terminal 30 are disposed in the housing 10. One of the first input terminal 20 and the second input terminal 30 is used to connect to the positive terminal of the battery module of the battery cabinet, and the other is used to connect to the negative terminal of the battery module.

[0047] As an example, the first input terminal 20 is connected to the positive terminal of the battery module and serves as the positive input terminal; the second input terminal 30 is connected to the negative terminal of the battery module and serves as the negative input terminal.

[0048] In some examples, the first input terminal 20 and the second input terminal 30 are located on the same side of the housing 10; alternatively, the first input terminal 20 and the second input terminal 30 are located on opposite sides of the housing 10.

[0049] At least a portion of the first input terminal 20 and at least a portion of the second input terminal 30 are exposed on the outside of the housing 10, which facilitates the connection of the first input terminal 20 and the second input terminal 30 to the positive and negative terminals of the battery module, and also facilitates the operation of the first input terminal 20 and the second input terminal 30.

[0050] In some examples, housing 10 includes a top wall 15 and a bottom wall 16, with the first input terminal 20 located within housing 10, and the top wall 15 exposing a portion of the first input terminal 20 and a portion of the second input terminal 30.

[0051] Optionally, the first input terminal 20 and the second input terminal 30 are arranged in a vertical direction, with the top wall 15 exposing a portion of the first input terminal 20 and the bottom wall 16 exposing a portion of the second input terminal 30.

[0052] Reference Figure 2 and Figure 3 As shown, the high-voltage box 1 includes a first output terminal 40 and a second output terminal 50, both of which are disposed in the housing 10.

[0053] In some examples, the first output terminal 40 and the second output terminal 50 are located on the same side of the housing 10; alternatively, the first output terminal 40 and the second output terminal 50 are located on opposite sides of the housing 10.

[0054] In some examples, housing 10 includes a top wall 15 and a bottom wall 16, with the first output terminal 40 located within housing 10 and the top wall 15 exposing a portion of the first output terminal 40.

[0055] In some examples, housing 10 includes a top wall 15 and a bottom wall 16, the second output terminal 50 is located within housing 10, and a portion of the second output terminal 50 is exposed by the top wall 15.

[0056] For example, the first output terminal 40 and the second output terminal 50, the first input terminal 20 and the second input terminal 30 are disposed on the same side of the housing 10 for easy installation and operation.

[0057] Optionally, the first output terminal 40 and the second output terminal 50 are arranged along a first direction X, which is parallel to the horizontal direction.

[0058] Reference Figure 2 and Figure 5 As shown, the high-voltage box 1 includes a first conductive element 60 and a second conductive element 70, which are disposed in the receiving cavity 11. The first conductive element 60 is connected to the first input terminal 20 and the first output terminal 40, and the second conductive element 70 is connected to the second input terminal 30 and the second output terminal 50.

[0059] The first conductive element 60 connects the first input terminal 20 and the first output terminal 40, and the second conductive element 70 connects the second input terminal 30 and the second output terminal 50 to form two circuits inside the high-voltage box 1.

[0060] In some examples, the structure of the first conductive element 60 is different from the structure of the second conductive element 70.

[0061] In some examples, the extension paths of the first conductive element 60 and the second conductive element 70 are different within the receiving cavity 11.

[0062] Reference Figure 3 As shown, the high-voltage box 1 includes a leakage current sensor 80, which is disposed in the receiving cavity 11. The leakage current sensor 80 has a through hole 81. A first conductive element 60 and a second conductive element 70 are both disposed through the through hole 81. The first conductive element 60 and the second conductive element 70 are arranged along a first direction X within the through hole 81. The first direction X is perpendicular to the axis of the through hole 81. The leakage current sensor 80 has a reference surface perpendicular to the first direction X and passing through the axis. The distance between the portion of the first conductive element 60 housed in the through hole 81 and the reference surface along the first direction X is d1, and the distance between the portion of the second conductive element 70 housed in the through hole 81 and the reference surface along the first direction X is d2, where 0.95≤d1 / d2≤1.05.

[0063] like Figure 3 As shown in the figure, the dashed line represents a reference plane that is perpendicular to the first direction X and passes through the axis.

[0064] The leakage current sensor 80 works by generating a magnetic field when current flows through the first conductive element 60 and the second conductive element 70 within the through hole 81. The leakage current sensor 80 monitors the current by detecting changes in the magnetic field. When a fault occurs in the battery module or other electrical components within the high-voltage box 1, the leakage current value may increase. When the leakage current value exceeds a set threshold, the battery cabinet can issue an early warning, helping staff to take timely measures and reduce safety risks.

[0065] For example, the leakage current sensor 80 employs a Hall sensor.

[0066] The first direction X is the direction from the first conductive element 60 to the second conductive element 70 within the through hole 81. The first direction X is perpendicular to the axis of the through hole 81.

[0067] The reference surface of the leakage current sensor 80 is perpendicular to the first direction X and passes through the axis. The first conductive element 60 and the second conductive element 70 are located on both sides of the reference surface along the first direction X.

[0068] For example, the reference plane is parallel to the direction of gravity.

[0069] The first conductive element 60 is made of conductive material.

[0070] For example, the first conductive element 60 is made of a metallic material, such as aluminum or copper.

[0071] The second conductive element 70 is made of a conductive material.

[0072] For example, the second conductive element 70 is made of a metallic material, such as aluminum or copper.

[0073] The ratio of the distance d1 between the portion of the first conductive element 60 housed in the through hole 81 and the reference surface along the first direction X to the distance d2 between the portion of the second conductive element 70 housed in the through hole 81 and the reference surface along the first direction X is 0.95, 0.96, 0.97, 0.98, 0.99, 1.00, 1.01, 1.02, 1.03, 1.04, 1.05 or other ranges formed by any two of the above endpoints.

[0074] The high-voltage box 1 of this application has a leakage current sensor 80 installed inside the housing 10, which can monitor the current status of the battery cabinet circuit in real time. When the leakage current value exceeds the set threshold, timely measures are taken. The built-in leakage current sensor 80 is physically protected by the housing 10, reducing the corrosion and interference of the external environment on the leakage current sensor 80, thereby improving its accuracy and extending its service life. Setting d1 / d2 to 0.95-1.05 ensures that the first conductive element 60 and the second conductive element 70 in the through hole 81 are located on both sides of the center of the through hole 81 and are arranged approximately symmetrically, reducing structural interference and improving the sensitivity and accuracy of leakage current detection.

[0075] Reference Figure 3 and 6 As shown, the portion of the first conductive element 60 housed in the through hole 81 and the portion of the second conductive element 70 housed in the through hole 81 are symmetrical about the reference plane.

[0076] The distance d1 between the portion of the first conductive element 60 housed in the through hole 81 and the reference surface along the first direction X is equal to the distance d2 between the portion of the second conductive element 70 housed in the through hole 81 and the reference surface along the first direction X.

[0077] In some examples, the structure of the portion of the first conductive element 60 housed in the through hole 81 is the same as the structure of the portion of the second conductive element 70 housed in the through hole 81.

[0078] For example, the portion of the first conductive element 60 housed in the through hole 81 is rectangular. The portion of the second conductive element 70 housed in the through hole 81 is also rectangular.

[0079] In some examples, the first conductive element 60 is spaced apart from the wall of the through hole 81. This reduces the risk of insulation breakdown and short circuits caused by creepage.

[0080] In some examples, the second conductive element 70 is spaced apart from the wall of the through hole 81. This reduces the risk of insulation breakdown and short circuits caused by creepage.

[0081] In some examples, the first conductive element 60 is covered with an insulating film. The second conductive element 70 is covered with an insulating film.

[0082] The portion of the first conductive element 60 housed in the through hole 81 and the portion of the second conductive element 70 housed in the through hole 81 are parallel within the through hole 81 to improve the detection accuracy of the leakage current sensor 80.

[0083] Reference Figure 3 and 6 As shown, in some embodiments, the minimum distance d3 between the first conductive element 60 and the wall of the through hole 81 is greater than or equal to 7 mm. This embodiment can increase the electrical clearance between the first conductive element 60 and the wall of the through hole 81, reduce the risk of discharge, and improve safety and reliability.

[0084] As an example, d3 is 7mm, 8mm, 10mm, 12mm, or 15mm, or any value within the range of the two values ​​mentioned above.

[0085] In some embodiments, the minimum distance d4 between the second conductive element 70 and the wall of the through hole 81 is greater than or equal to 7 mm. This embodiment can increase the electrical clearance between the second conductive element 70 and the wall of the through hole 81, reduce the risk of discharge, and improve safety and reliability.

[0086] As an example, d4 is 7mm, 8mm, 10mm, 12mm, or 15mm, or any value within the range of the two values ​​mentioned above.

[0087] In some examples, the through-hole 81 is circular.

[0088] Reference Figures 6 to 8The first conductive element 60 includes a first main body portion 61 and a first bent portion 62. The first main body portion 61 passes through the through hole 81, and the first bent portion 62 is connected to the first main body portion 61 and bent relative to the first main body portion 61. In the second direction Y, the minimum distance L1 between the first bent portion 62 and the leakage current sensor 80 is greater than or equal to 15mm, and the second direction Y is parallel to the axis.

[0089] When subjected to external forces, such as vibration of the upstream circuit or tensile force during assembly, the first bending part 62 can buffer the stress through its own deformation, so that the first conductive part 60 has high structural stability.

[0090] In some examples, the first bend 62 is connected to the first main body 61 and the first input terminal 20, and the first main body 61 is connected to the first output terminal 40. The first bend 62 is located upstream of the first main body 61. In the compact internal structure of the high-voltage box 1, the bend design of the first conductive element 60 can avoid other electrical components, reducing the risk of assembly interference.

[0091] In some examples, the first bend 62 is connected to the first main body 61 and the first output terminal 40, and the first main body 61 is connected to the first input terminal 20. The first bend 62 is located downstream of the first main body 61. The first bend 62, through a preset bending angle, can achieve a connection direction consistent with the first output terminal 40, making it easy to connect the first conductive element 60 to the first output terminal 40.

[0092] For example, at least a portion of the first main body 61 is a straight segment.

[0093] Optionally, the first main body 61 extends along the second direction Y, which is perpendicular to the first direction X and parallel to the axis of the through hole 81.

[0094] The number of the first bend 62 is one or more.

[0095] Optionally, a plurality of first bends 62 are located on both sides of the first main body 61.

[0096] In the second direction Y, the minimum distance L1 between the first bent portion 62 and the leakage current sensor 80 refers to the minimum distance between the end face of the first bent portion 62 facing the first main body portion 61 and the end face of the leakage current sensor 80 facing the first bent portion 62 in the second direction Y.

[0097] In some examples, in the second direction Y, the minimum distance L1 between the first bend 62 and the leakage current sensor 80 is greater than or equal to 20 mm.

[0098] The magnetic field generated when current flows through the first bend 62 may cause additional interference to the magnetic field generated when current flows through the first main body 61 and the leakage current sensor 80. By limiting the minimum distance L1 between the first bend 62 and the leakage current sensor 80, the impact of the first bend 62 on the leakage current detection accuracy can be reduced.

[0099] Reference Figure 6 and Figure 7 As shown, the first bent portion 62 is connected to the end of the first main body portion 61 along the third direction Z, and bends toward the side of the first main body portion 61 away from the second conductive member 70, with the third direction Z perpendicular to the first direction X and the axis.

[0100] Optionally, the direction opposite to the third direction Z is the direction of gravity.

[0101] In some examples, the first bent portion 62 and the first main body portion 61 are integrally formed.

[0102] In some examples, the first bend 62 is connected to the first output terminal 40. The first bend 62 may be directly connected to the first output terminal 40, or it may be connected to the first output terminal 40 via other components.

[0103] Optionally, the minimum distance L1 between the first bend 62 and the leakage current sensor 80 is greater than or equal to 25 mm.

[0104] The first bending portion 62 is bent to a plane perpendicular to the first main body portion 61, thereby adjusting the connection end face between the first conductive member 60 and the first output terminal 40 to a horizontal direction, facilitating their assembly and connection. The first bending portion 62 is bent away from the second conductive member 70 to reduce spatial interference with the second conductive member 70.

[0105] Reference Figure 6 and Figure 7 As shown, the first conductive element 60 includes a first connecting portion 63, a first bending portion 62 connecting the first main body portion 61 and the first connecting portion 63, the angle between the first connecting portion 63 and the first main body portion 61 is 85° to 95°, and the first connecting portion 63 is connected to the first output terminal 40.

[0106] Optionally, the first bending portion 62, the first main body portion 61, and the first connecting portion 63 are integrally formed. Integral forming simplifies the production process and reduces assembly steps. The integrally formed structure reduces contact resistance between components at the interface, improving the conductivity and safety of the first conductive component 60.

[0107] The angle between the first connecting portion 63 and the first main body portion 61 is 85°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93°, 94°, 95°, or any other range formed by any two of the above endpoints. The first connecting portion 63 is perpendicular to the first main body portion 61.

[0108] In some embodiments, the first connecting part 63 is connected to the first output terminal 40, and the connection method includes, but is not limited to, screw connection, snap-fit, welding, and connection of connecting parts.

[0109] For example, the first connection portion 63 is stacked and connected to a portion of the first output terminal 40 along the third direction Z.

[0110] In some examples, the first connection portion 63 extends along the second direction Y, which can increase the connection area with the first output terminal 40 and improve connection stability.

[0111] By providing the first connecting part 63 and the first bending part 62, the overall structure of the first conductive element 60 can be better adapted to the first output terminal 40, increasing the connection stability between the first conductive element 60 and the first output terminal 40, and reducing the risk of deformation or damage to the first output terminal 40 during assembly.

[0112] Reference Figure 4 , Figure 8 and Figure 9 As shown, the housing 10 includes a first mounting plate 12. The first output terminal 40 includes a first conductive part 41 and a second conductive part 42. The first conductive part 41 and the first connecting part 63 are stacked and connected along the third direction Z. The first conductive part 41 passes through the first mounting plate 12. The second conductive part 42 is connected to the first conductive part 41 and is located on the side of the first mounting plate 12 away from the leakage current sensor 80. The second conductive part 42 is bent relative to the first conductive part 41. The third direction Z is perpendicular to the first direction X and the axis.

[0113] The first mounting plate 12 is located on one side of the leakage current sensor 80 along the second direction Y. The direction in which the leakage current sensor 80 points towards the first mounting plate 12 is the second direction Y.

[0114] As an example, the housing 10 includes a second wall 18 and a first wall 17 spaced apart in the second direction Y, and a first mounting plate 12 is disposed between the second wall 18 and the first wall 17.

[0115] Optionally, the housing 10 includes a top wall 15 and a bottom wall 16, with a first mounting plate 12 located between the top wall 15 and the bottom wall 16, and the top wall 15 exposing a first wall 17.

[0116] The first output terminal 40 is fixed to the first mounting plate 12. The fixing method includes, but is not limited to, welding, bolting, hinge, snap-fitting, gluing, and connection of connecting parts.

[0117] Optionally, the second output terminal 50 is fixed to the first mounting plate 12.

[0118] Alternatively, the first input terminal 20 and the second input terminal 30 are fixed to the first mounting plate 12.

[0119] For example, the first output terminal 40 and the second output terminal 50 are disposed at one end of the first mounting plate 12 along the second direction Y, and the first input terminal 20 and the second input terminal 30 are disposed at the other end of the first mounting plate 12 along the second direction Y.

[0120] In some examples, the first output terminal 40 includes an insulating bracket fixed to the first mounting plate 12, with a portion of the insulating bracket protruding from the first mounting plate 12. At least one of the first conductive portion 41 and the second conductive portion 42 is connected to the insulating bracket. The insulating bracket has an opening that exposes the second conductive portion 42.

[0121] For example, the first conductive part 41 includes a first hole 411, which is configured to engage with a screw to connect the first conductive part 41 to the first connecting part 63.

[0122] The number of first holes 411 is one or more.

[0123] For example, the second conductive part 42 includes a second hole 421, which is configured to engage with a screw to connect the second conductive part 42 to the first mounting plate 12.

[0124] The number of second holes 421 is one or more.

[0125] Optionally, a plurality of second holes 421 are spaced apart along the third direction Z. The plurality of second holes 421 enable multi-point fixation of the second conductive part 42 to the first mounting plate 12, so that the second conductive part 42 is firmly connected to the first mounting plate 12.

[0126] In some examples, the angle between the second conductive part 42 and the first conductive part 41 is 85° to 95°.

[0127] For example, the second conductive portion 42 and the first conductive portion 41 are L-shaped.

[0128] As an example, the first output terminal 40 includes a third conductive portion 43, which is connected to the second conductive portion 42 and protrudes from the first conductive portion 41 in a third direction Z.

[0129] Optionally, along the third direction Z, the portion of the third conductive part 43 that protrudes from the first conductive part 41 is annular. The second conductive part 42 is bent relative to the first conductive part 41, and both are connected to the first mounting plate 12 and the first conductive member 60 respectively, so that the second conductive part 42 and the first conductive part 41 can support each other and jointly distribute stress.

[0130] Reference Figure 7 and Figure 8 As shown, the second conductive element 70 includes a second main body portion 71 and a second bent portion 72. The second main body portion 71 passes through the through hole 81, and the second bent portion 72 is connected to the end of the second main body portion 71 along the second direction Y, and bends towards the side of the second main body portion 71 away from the first conductive element 60. The second direction Y is parallel to the axis. In the second direction Y, the minimum distance L2 between the second bent portion 72 and the leakage current sensor 80 is greater than or equal to 15mm.

[0131] In some examples, the second bend 72 is connected to the second body 71 and the second input terminal 30, and the second body 71 is connected to the second output terminal 50.

[0132] In some examples, the second bend 72 is connected to the second body 71 and the second output terminal 50, and the second body 71 is connected to the second input terminal 30.

[0133] For example, at least a portion of the second main body 71 is a straight section.

[0134] Optionally, the second main body 71 extends along the second direction Y, which is perpendicular to the first direction X and parallel to the axis of the through hole 81.

[0135] The number of the second bend 72 is one or more.

[0136] In some examples, the second conductive member 70 includes a second connecting portion 73 and a third bending portion 74, the second connecting portion 73 being connected to the third bending portion 74 and the second bending portion 72, and the third bending portion 74 being connected to one end of the second connecting portion 73 along a third direction Z and bent toward the side of the second connecting portion 73 closer to the first conductive member 60.

[0137] Optionally, the second conductive element 70 includes a third connecting portion 75, a third bending portion 74 connected to the second connecting portion 73 and the third connecting portion 75, and the angle between the third connecting portion 75 and the first main body portion 61 is 85° to 95°.

[0138] Optionally, a portion of the second output terminal 50 is stacked and connected to the third connection portion 75 along the third direction Z.

[0139] In some examples, in the second direction Y, the minimum distance L2 between the second bend 72 and the leakage current sensor 80 is greater than or equal to 20 mm.

[0140] Optionally, the minimum distance L2 between the second bend 72 and the leakage current sensor 80 is greater than or equal to 25 mm.

[0141] The magnetic field generated when current flows through the second bend 72 may cause additional interference to the magnetic field generated when current flows through the second main body 71 and the leakage current sensor 80. By limiting the minimum distance L2 between the second bend 72 and the leakage current sensor 80, the impact of the second bend 72 on the leakage current detection accuracy can be reduced.

[0142] Reference Figure 3 , Figure 4 and Figure 7 As shown, the housing 10 includes a second mounting plate 13 and a third mounting plate 14. The second mounting plate 13 is disposed on one side of the leakage current sensor 80 along the first direction X, and the third mounting plate 14 is disposed on one side of the leakage current sensor 80 along the third direction Z, which is perpendicular to the first direction X and the axis. The leakage current sensor 80 includes a bracket 82 and a detection element 83 housed within the bracket 82. The bracket 82 has a through hole 81. The bracket 82 includes a first fixing part 84 and a second fixing part 85. The first fixing part 84 is fixed to the second mounting plate 13, and the second fixing part 85 is fixed to the third mounting plate 14.

[0143] The first mounting plate 12 is connected to the second mounting plate 13.

[0144] Optionally, the first mounting plate 12 is also connected to the third mounting plate 14.

[0145] The leakage current sensor 80 includes a detection element 83, which is electrically connected to the controller to transmit a detection signal to the controller.

[0146] In some examples, the bracket 82 includes a bracket body having a receiving space, in which the detection element 83 is disposed. The bracket 82 body has a through hole 81 along the second direction Y. A first fixing part 84 fixes the bracket body and the second mounting plate 13. A second fixing part 85 fixes the bracket body and the third mounting plate 14.

[0147] The number of the first fixed part 84 is one or more.

[0148] The first fixing part 84 is fixed to the second mounting plate 13. The fixing method includes, but is not limited to, welding, bolt connection, hinge, snap-fit, adhesive bonding, and connection of connecting parts.

[0149] The number of the second fixing part 85 is one or more.

[0150] The second fixing part 85 is fixed to the third mounting plate 14. The fixing method includes, but is not limited to, welding, bolt connection, hinge, snap-fit, adhesive bonding, and connection of connecting parts.

[0151] The leakage current sensor 80 is fixed to the bracket 82 in multiple directions and at multiple points, which improves the overall anti-shaking ability of the leakage current sensor 80 and improves problems such as loosening and locking failure.

[0152] Reference Figure 6 and Figure 7 As shown, the bracket 82 includes a plurality of second fixing parts 85, which are respectively disposed on both sides of the bracket 82 along the second direction Y. The second fixing part 85 located on one side of the bracket 82 along the first direction X is provided with a waist-shaped hole 86, and the second fixing part 85 located on the other side of the bracket 82 along the first direction X is provided with a circular hole 87.

[0153] For example, the bracket 82 is provided with at least two second fixing parts 85 on both sides along the second direction Y.

[0154] In some examples, multiple second fixing parts 85 located on the side of the bracket 82 along the second direction Y are spaced apart along the first direction X. This improves the connection stability between the bracket 82 and the third mounting plate 14.

[0155] In some examples, multiple second fixing parts 85 located on both sides of the bracket 82 along the second direction Y are provided in a one-to-one correspondence.

[0156] For example, the high-voltage box 1 includes a first bolt that engages with a slotted hole 86 to secure the bracket 82 to the third mounting plate 14.

[0157] For example, the high-voltage box 1 includes a second bolt that engages with a circular hole 87 to secure the bracket 82 to the third mounting plate 14.

[0158] The oblong hole 86 and the circular hole 87 work together to ensure that the bracket 82 and the third mounting plate 14 have high assembly accuracy. The oblong hole 86 can absorb assembly tolerances and improve assembly efficiency.

[0159] Reference Figure 4 and Figure 7 As shown, the first fixing part 84 is disposed on one side of the bracket 82 along the third direction Z. The high-voltage box 1 includes a connector 90, which is connected to the first fixing part 84 and the second mounting plate 13.

[0160] In some examples, the connector 90 includes a first part and a second part, the first part being fixed to the second mounting plate 13 and the second part being fixed to the first fixing part 84.

[0161] For example, the second part is bent relative to the first part. The bent structure can absorb energy loads through deformation, thus giving the bracket 82 and the second mounting plate 13 a high degree of connection stability.

[0162] Optionally, the first part and the second part are L-shaped.

[0163] For example, the first fixing part 84 is provided with a connecting hole along the third direction Z, and the second part is provided with a bolt hole communicating with the connecting hole. The screw passes through the connecting hole and the bolt hole to fix the bracket 82 to the connector 90.

[0164] The first fixing part 84 and the second mounting plate 13 are connected by a connector 90, which simplifies the connection method; at the same time, the connection between the bracket 82 and the second mounting plate 13 is also more stable.

[0165] The high-voltage box 1 includes at least one electrical component 100, which is connected to a first conductive element 60 and a first input terminal 20.

[0166] The high-voltage box 1 includes multiple electrical components 100, which are connected to the first conductive element 60 and the first input terminal 20.

[0167] Optionally, multiple electrical components 100 are connected in series to the first conductive element 60 and the first input terminal 20.

[0168] Electrical component 100 includes, but is not limited to, shunts, fuses, circuit breakers, and main relays.

[0169] For example, the circuit breaker is connected to the first conductive element 60 and the first input terminal 20, and is located upstream of the leakage current sensor 80. When the detected leakage current value exceeds a threshold, the circuit breaker is tripped to protect other electrical components 100.

[0170] In some examples, at least one electrical component 100 is connected to the second conductive element 70 and the second input terminal 30. The electrical component 100 is positioned upstream of the leakage current sensor 80 and is capable of monitoring leakage current caused by a fault in the electrical component 100 in the circuit, thereby covering a wider range of leakage current monitoring.

[0171] Secondly, referring to Figure 10 As shown, this application provides a battery cabinet, which includes a battery module 2 and the aforementioned high-voltage box 1.

[0172] The high-voltage box 1 is electrically connected to the positive and negative terminals of the battery module 2 via the first input terminal 20 and the second input terminal 30. This is used to monitor the leakage current of the battery module 2 and to take timely measures to improve the safety performance and lifespan of the battery cabinet.

[0173] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This 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 high-voltage box for a battery cabinet, characterized in that, include: The shell has a receiving cavity; A first input terminal and a second input terminal are disposed on the housing. One of the first input terminal and the second input terminal is used to connect to the positive terminal of the battery module of the battery cabinet, and the other is used to connect to the negative terminal of the battery module. The first output terminal and the second output terminal are disposed in the housing; A first conductive element and a second conductive element are disposed in the receiving cavity. The first conductive element is connected to the first input terminal and the first output terminal, and the second conductive element is connected to the second input terminal and the second output terminal. A leakage current sensor is disposed in the receiving cavity. The leakage current sensor has a through hole. A first conductive element and a second conductive element are both disposed through the through hole. The first conductive element and the second conductive element are arranged along a first direction within the through hole. The first direction is perpendicular to the axis of the through hole. The leakage current sensor has a reference surface perpendicular to the first direction and passing through the axis. The distance between the portion of the first conductive element housed in the through hole and the reference surface along the first direction is d1. The distance between the portion of the second conductive element housed in the through hole and the reference surface along the first direction is d2. 0.95≤d1 / d2≤1.

05.

2. The high-voltage box according to claim 1, characterized in that, The portion of the first conductive element housed in the through hole and the portion of the second conductive element housed in the through hole are symmetrical about the reference plane.

3. The high-voltage box according to claim 1 or 2, characterized in that, The minimum distance d3 between the first conductive element and the wall of the through hole is greater than or equal to 7 mm; The minimum distance d4 between the second conductive element and the wall of the through hole is greater than or equal to 7 mm.

4. The high-voltage box according to any one of claims 1-3, characterized in that, The first conductive element includes a first main body portion and a first bent portion. The first main body portion passes through the through hole, and the first bent portion is connected to the first main body portion and bent relative to the first main body portion. In the second direction, the minimum distance L1 between the first bend and the leakage current sensor is greater than or equal to 15 mm, and the second direction is parallel to the axis.

5. The high-voltage box according to claim 4, characterized in that, The first bent portion is connected to the end of the first main body portion along a third direction and bends toward the side of the first main body portion away from the second conductive element, wherein the third direction is perpendicular to the first direction and the axis.

6. The high-voltage box according to claim 4, characterized in that, The first conductive element includes a first connecting portion, a first bent portion connecting the first main body portion and the first connecting portion, the angle between the first connecting portion and the first main body portion being 85° to 95°, and the first connecting portion being connected to the first output terminal.

7. The high-voltage box according to claim 6, characterized in that, The housing includes a first mounting plate; The first output terminal includes a first conductive part and a second conductive part. The first conductive part and the first connecting part are stacked and connected along a third direction. The first conductive part passes through the first mounting plate. The second conductive part is connected to the first conductive part and is located on the side of the first mounting plate away from the leakage current sensor. The second conductive part is bent relative to the first conductive part. The third direction is perpendicular to the first direction and the axis.

8. The high-voltage box according to any one of claims 1-7, characterized in that, The second conductive element includes a second main body portion and a second bent portion. The second main body portion passes through the through hole, and the second bent portion is connected to the end of the second main body portion along a second direction and bends toward the side of the second main body portion away from the first conductive element. The second direction is parallel to the axis. In the second direction, the minimum distance L2 between the second bend and the leakage current sensor is greater than or equal to 15 mm.

9. The high-voltage box according to any one of claims 1-8, characterized in that, The housing includes a second mounting plate and a third mounting plate. The second mounting plate is disposed on one side of the leakage current sensor along the first direction, and the third mounting plate is disposed on one side of the leakage current sensor along a third direction, which is perpendicular to the first direction and the axis. The leakage current sensor includes a bracket and a detection element housed within the bracket, the bracket being provided with the through hole; The bracket includes a first fixing part and a second fixing part, the first fixing part being fixed to the second mounting plate, and the second fixing part being fixed to the third mounting plate.

10. The high-voltage box according to claim 9, characterized in that, The bracket includes a plurality of second fixing parts, which are respectively disposed on both sides of the bracket along the second direction. The second fixing part located on one side of the bracket along the first direction has a waist-shaped hole, and the second fixing part located on the other side of the bracket along the first direction has a circular hole.

11. The high-voltage box according to claim 9, characterized in that, The first fixing part is disposed on one side of the bracket along the third direction; The high-voltage box includes a connector that is connected to the first fixing part and the second mounting plate.

12. The high-voltage box according to claim 1, characterized in that, The high-voltage box includes at least one electrical component, which is connected to the first conductive element and the first input terminal.

13. A battery cabinet, characterized in that, The battery cabinet includes a battery module and a high-voltage box according to any one of claims 1 to 12.

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