Relay, distribution box and battery pack

Abstract

The utility model discloses a relay, a power distribution box and a battery pack. The relay comprises a first shell, an isolation plate, a first static contact terminal and a second static contact terminal. The first static contact terminal penetrates through the first shell and is provided with a first section exposed out of the first shell; the second static contact terminal penetrates through the first shell and is provided with a second section exposed out of the first shell; the isolation plate and the first shell are integrally formed, and the isolation plate is arranged between the first section and the second section. The creepage distance and the electric gap between the first section and the second section are increased through the isolation plate, so that the risk of electric leakage between the first static contact terminal and the second static contact terminal is reduced, and the insulation requirement of the high-voltage battery pack is met. Meanwhile, the isolation plate and the first shell are arranged to be of an integrally-formed structure, the connection strength of the isolation plate and the first shell can be improved, the isolation plate and the first shell are prevented from falling off in the use process, and the relay is convenient to assemble and use.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a relay, a power distribution box, and a battery pack. Background Technology

[0002] With the rapid development of the new energy vehicle industry, in order to meet users' needs for fast charging and long driving range, the voltage of battery packs is being set higher and higher.

[0003] In related technologies, relays are incorporated into the battery pack to control the connection and disconnection of the circuit. However, the relays in these technologies have poor insulation performance and cannot meet the insulation requirements of high-voltage battery packs. Utility Model Content

[0004] This application aims to provide a relay, a distribution box, and a battery pack that can solve the problem of poor insulation performance of relays in related technologies.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a relay, comprising: a first housing, an isolation plate, a first stationary contact terminal, and a second stationary contact terminal;

[0007] The first stationary contact terminal passes through the first housing and has a first section exposed outside the first housing; the second stationary contact terminal passes through the first housing and has a second section exposed outside the first housing.

[0008] The isolation plate is integrally formed with the first housing and is disposed between the first section and the second section.

[0009] Optionally, the isolation plate includes a first end and a second end disposed opposite to each other, the first end being connected to the first housing, the second end extending toward an end away from the first housing, and the thickness of the isolation plate gradually decreasing from the first end to the second end.

[0010] Optionally, the side of the partition plate facing away from the first housing is higher than the side of the first segment facing away from the first housing;

[0011] And / or, the side of the partition plate opposite to the first housing is higher than the side of the second section opposite to the first housing.

[0012] Optionally, the first housing has a first mounting hole and a second mounting hole arranged at intervals on the side facing the isolation plate, the first stationary contact terminal passes through the first mounting hole, the second stationary contact terminal passes through the second mounting hole, and the first housing has a first boss on the side facing the isolation plate, the first boss surrounding the first mounting hole.

[0013] And / or, the first housing has a second protrusion on the side facing the isolation plate, and the second protrusion is arranged around the second mounting hole.

[0014] Optionally, the first housing includes a main body and a protrusion; the protrusion is connected to the main body, and the isolation plate is disposed on the side of the protrusion away from the main body; the first stationary contact terminal and the second stationary contact terminal both pass through the protrusion;

[0015] The height direction of the relay is a first direction, and a second direction intersects the first direction. Along the first direction, the projected area of ​​the protrusion is smaller than the projected area of ​​the main body. The isolation plate extends from one side of the protrusion to the other side along the second direction.

[0016] Optionally, the first housing is a ceramic housing, and the isolation plate is a ceramic isolation plate.

[0017] Optionally, the relay further includes an electromagnetic component, which is located on the side of the first housing away from the isolation plate. The electromagnetic component is connected to the first housing, and a connecting portion is provided on the outer surface of the electromagnetic component.

[0018] Optionally, the electromagnetic component includes a second housing and a coil;

[0019] The second housing is connected to the first housing. The second housing has a receiving cavity inside, the coil is disposed in the receiving cavity, and the connecting part protrudes from the outer surface of the second housing.

[0020] Secondly, embodiments of this application provide a power distribution box, including connection terminals and a relay as described in any of the above claims, wherein the connection terminals are electrically connected to the first segment and the second segment respectively.

[0021] Thirdly, embodiments of this application propose a battery pack including the power distribution box described above.

[0022] In the embodiments of this application, an isolation plate is provided between the first segment of the first stationary contact terminal and the second segment of the second stationary contact terminal to form an isolation between the first and second stationary contact terminals. This isolation plate increases the creepage distance and electrical clearance between the first and second segments of the first and second stationary contact terminals, reducing the risk of leakage between them and thus improving the insulation performance of the relay to meet the insulation requirements of the high-voltage battery pack. Furthermore, by making the isolation plate and the first housing an integrally formed structure, this application not only enhances the connection strength between the isolation plate and the first housing, preventing them from detaching during use and ensuring the isolation plate provides insulation between the first and second stationary contact terminals, but also facilitates the assembly and use of the relay.

[0023] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a schematic diagram of a first structure of a relay according to an embodiment of this application;

[0026] Figure 2 yes Figure 1 An enlarged view of part A, shown in the center circle;

[0027] Figure 3 This is a top view of a first structure of a relay according to an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the connection structure between the relay and the copper busbar according to an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of a second structure of a relay according to an embodiment of this application.

[0030] Figure label:

[0031] 10: First housing; 11: Main body; 12: Protrusion; 13: First mounting hole; 14: Second mounting hole; 20: Isolation plate; 21: First end; 22: Second end; 23: First boss; 24: Second boss; 30: First stationary contact terminal; 31: First segment; 40: Second stationary contact terminal; 41: Second segment; 50: Electromagnetic assembly; 51: Second housing; 511: Connecting part; 512: Receiving cavity; 52: Coil; 60: Copper busbar; 70: Bolt; X: First direction; Y: Second direction. Detailed Implementation

[0032] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0034] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] The relays, distribution boxes, and battery packs provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0037] With the development and progress of the new energy vehicle industry, users are demanding not only higher driving range but also faster charging capabilities from vehicle batteries. Therefore, to meet these demands, it is necessary to further increase the voltage of battery packs. Currently, the voltage of new energy vehicle battery packs is upgrading to 800V or even 1000V, posing increasingly stringent challenges to the insulation design of high-voltage systems, especially for relays. Insufficient creepage distance or clearance in relays can lead to insulation breakdown, causing internal short circuits or leakage within the battery pack, thus creating safety hazards.

[0038] like Figure 1 As shown, a relay provided according to some embodiments of this application includes a first housing 10, an isolation plate 20, a first stationary contact terminal 30, and a second stationary contact terminal 40; the first stationary contact terminal 30 passes through the first housing 10 and has a first segment 31 exposed outside the first housing 10; the second stationary contact terminal 40 passes through the first housing 10 and has a second segment 41 exposed outside the first housing 10; wherein, the isolation plate 20 is integrally formed with the first housing 10, and the isolation plate 20 is disposed between the first segment 31 and the second segment 41.

[0039] In the embodiments of this application, an isolation plate 20 is provided between the first segment 31 of the first stationary contact terminal 30 and the second segment 41 of the second stationary contact terminal 40 to form an isolation between the first stationary contact terminal 30 and the second stationary contact terminal 40. This isolation plate 20 increases the creepage distance and electrical clearance between the first segment 31 of the first stationary contact terminal 30 and the second segment 41 of the second stationary contact terminal 40, thereby reducing the risk of leakage between the first stationary contact terminal 30 and the second stationary contact terminal 40. This improves the insulation performance of the relay, enabling it to meet the insulation requirements of the high-voltage battery pack. Furthermore, by making the isolation plate 20 and the first housing 10 an integrally formed structure, this not only enhances the connection strength between the isolation plate 20 and the first housing 10, preventing them from detaching during use, but also ensures that the isolation plate 20 provides insulation between the first stationary contact terminal 30 and the second stationary contact terminal 40, facilitating the assembly and use of the relay.

[0040] It should be noted that electrical clearance refers to the shortest straight-line distance between two conductive components in the air, that is, the physical distance separated by the air medium; creepage distance refers to the shortest distance between two conductive components along the surface of an insulating component. For example, conductive components may refer to the first stationary contact terminal 30 and the second stationary contact terminal 40 in the embodiments of this application, and insulating components may refer to the isolation plate 20 in the embodiments of this application.

[0041] Optionally, such as Figure 2As shown, the isolation plate 20 includes a first end 21 and a second end 22 disposed opposite to each other. The first end 21 is connected to the first housing 10, and the second end 22 extends toward the end away from the first housing 10. The thickness of the isolation plate 20 gradually decreases from the first end 21 to the second end 22.

[0042] In this embodiment of the application, by setting the thickness of the isolation plate 20 to gradually decrease from the first end 21 to the second end 22, the connection strength between the isolation plate 20 and the first housing 10 can be improved, while also saving the material of the isolation plate 20, reducing the weight of the relay and reducing production costs.

[0043] In other embodiments, the thickness of the partition plate 20 can be set to be uniform from the first end 21 to the second end 22, which facilitates production and processing.

[0044] In one embodiment, the side of the partition plate 20 facing away from the first housing 10 is higher than the side of the first segment 31 facing away from the first housing 10.

[0045] In this embodiment, by setting the side of the isolation plate 20 away from the first housing 10 to be higher than the side of the first segment 31 away from the first housing 10, the creepage distance of the electric arc between the first segment 31 and the second segment 41 can be increased. This causes the electric arc to have to take a longer detour when it encounters the isolation plate 20, thereby producing the effect of arc reduction and arc extinguishing, thus preventing a short circuit between the first stationary contact terminal 30 and the second stationary contact terminal 40, thereby improving the insulation performance and safety of the relay.

[0046] In one embodiment, the side of the partition plate 20 facing away from the first housing 10 is higher than the side of the second segment 41 facing away from the first housing 10.

[0047] In this embodiment, by setting the side of the isolation plate 20 away from the first housing 10 to be higher than the side of the second segment 41 of the second stationary contact terminal 40 away from the first housing 10, the creepage distance of the electric arc between the first segment 31 and the second segment 41 can be increased, so that the electric arc needs to take a longer detour when it encounters the isolation plate 20, thereby producing the effect of arc reduction and arc extinguishing, thereby preventing a short circuit between the first stationary contact terminal 30 and the second stationary contact terminal 40, and improving the insulation performance and safety of the relay.

[0048] In another embodiment, such as Figure 2 As shown, the side of the isolation plate 20 facing away from the first housing 10 is higher than the side of the first segment 31 facing away from the first housing 10, and the side of the isolation plate 20 facing away from the first housing 10 is higher than the side of the second segment 41 facing away from the first housing 10.

[0049] In this embodiment, by setting the side of the isolation plate 20 away from the first housing 10 to be higher than the side of the first segment 31 away from the first housing 10, and the side of the isolation plate 20 away from the first housing 10 being higher than the side of the second segment 41 away from the first housing 10, the creepage distance between the first segment 31 of the first stationary contact terminal 30 and the second segment 41 of the second stationary contact terminal 40 is further increased. In this way, when the arc between the first stationary contact terminal 30 and the second stationary contact terminal 40 encounters the isolation plate 20, it needs to take a longer detour, thereby producing the effect of arc reduction and arc extinguishing, thus preventing the formation of a short circuit between the first stationary contact terminal 30 and the second stationary contact terminal 40, thereby improving the insulation performance and safety of the relay.

[0050] In some embodiments, such as Figure 4 As shown, copper busbars 60 and bolts 70 are connected to the first stationary contact terminal 30 and the second stationary contact terminal 40. The copper busbars 60 are fixedly connected to the first stationary contact terminal 30 and the second stationary contact terminal 40 by the bolts 70, so as to make an electrical connection with the connection terminals of the distribution box using the copper busbars 60.

[0051] It should be noted that, as Figure 5 As shown, the height of the isolation plate 20 along the first direction X is H1, and the height of the first segment 31 and the second segment 41 along the first direction X is H2. The height H1 needs to be greater than the height H2 so that the electrical clearance and creepage distance between the first stationary contact terminal 30 and the second stationary contact terminal 40 meet the requirements of GB / T16935 or UL2580. Sufficient electrical clearance can prevent air breakdown caused by high voltage, and sufficient creepage distance can suppress leakage.

[0052] In one embodiment, such as Figure 2 and Figure 3 As shown, the first housing 10 has a first mounting hole 13 and a second mounting hole 14 arranged at intervals on the side facing the isolation plate 20. The first stationary contact terminal 30 passes through the first mounting hole 13, and the second stationary contact terminal 40 passes through the second mounting hole 14. The first housing 10 has a first boss 23 on the side facing the isolation plate 20, and the first boss 23 is arranged around the first mounting hole 13.

[0053] In this embodiment of the application, by providing a first mounting hole 13 on the side of the first housing 10 facing the isolation plate 20, and providing a first boss 23 around the first mounting hole 13, when the first stationary contact terminal 30 passes through the first mounting hole 13, the first boss 23 can be used to improve the connection stability between the first stationary contact terminal 30 and the first housing 10, thereby improving the operating stability of the relay.

[0054] In one embodiment, such as Figure 2 and Figure 3As shown, the first housing 10 has a first mounting hole 13 and a second mounting hole 14 arranged at intervals on the side facing the isolation plate 20. The first stationary contact terminal 30 passes through the first mounting hole 13, and the second stationary contact terminal 40 passes through the second mounting hole 14. The first housing 10 has a second boss 24 on the side facing the isolation plate 20, and the second boss 24 is arranged around the second mounting hole 14.

[0055] In this embodiment, by providing a second mounting hole 14 on the side of the first housing 10 facing the isolation plate 20, and providing a second boss 24 around the second mounting hole 14, when the second stationary contact terminal 40 passes through the second mounting hole 14, the second boss 24 can be used to improve the connection stability between the second stationary contact terminal 40 and the first housing 10, thereby improving the operating stability of the relay.

[0056] In another embodiment, such as Figure 2 and Figure 3 As shown, the first housing 10 has a first mounting hole 13 and a second mounting hole 14 arranged at intervals on the side facing the isolation plate 20. The first stationary contact terminal 30 passes through the first mounting hole 13, and the second stationary contact terminal 40 passes through the second mounting hole 14. The first housing 10 has a first boss 23 on the side facing the isolation plate 20, which surrounds the first mounting hole 13. The first housing 10 also has a second boss 24 on the side facing the isolation plate 20, which surrounds the second mounting hole 14.

[0057] In this embodiment, by providing a first mounting hole 13 on the side of the first housing 10 facing the isolation plate 20, and providing a first boss 23 around the first mounting hole 13, and providing a second mounting hole 14 on the side of the first housing 10 facing the isolation plate 20, and providing a second boss 24 around the second mounting hole 14, when the first stationary contact terminal 30 and the second stationary contact terminal 40 are respectively passed through the first mounting hole 13 and the second mounting hole 14, the first boss 23 and the second boss 24 can be used to improve the connection stability between the first stationary contact terminal 30 and the second stationary contact terminal 40 and the first housing 10, thereby improving the operating stability of the relay.

[0058] Optionally, such as Figure 5 As shown, the first housing 10 includes a main body 11 and a protrusion 12; the protrusion 12 is connected to the main body 11, and the isolation plate 20 is disposed on the side of the protrusion 12 away from the main body 11; the first stationary contact terminal 30 and the second stationary contact terminal 40 are both disposed through the protrusion 12; the height direction of the relay is the first direction X, and the second direction Y intersects the first direction X. Along the first direction X, the projected area of ​​the protrusion 12 is smaller than the projected area of ​​the main body 11, and the isolation plate 20 extends from one side of the protrusion 12 to the other side along the second direction Y.

[0059] In this embodiment, by providing a protrusion 12 on the main body 11, and placing the isolation plate 20 on the side of the protrusion 12 away from the main body 11, the isolation plate 20 extends from one side of the protrusion 12 to the other side along the second direction Y. Furthermore, the projected area of ​​the protrusion 12 is smaller than the projected area of ​​the main body 11. This reduces the amount of isolation plate 20 required, saving production costs and reducing the weight of the relay, thus providing convenience for users.

[0060] It should be noted that the length of the isolation plate 20 along the second direction Y must meet the electrical clearance and creepage distance between the first stationary contact terminal 30 and the second stationary contact terminal 40. The electrical clearance and creepage distance must meet the requirements of GB / T 16935 or UL2580.

[0061] Optionally, the first housing 10 is a ceramic housing, and the isolation plate 20 is a ceramic isolation plate 20.

[0062] In this embodiment of the application, by setting the first housing 10 as a ceramic housing and the isolation plate 20 as a ceramic isolation plate 20, ceramics can not only achieve insulation, but also have the advantages of good high temperature resistance, easy production and processing, and long service life.

[0063] Optionally, such as Figure 5 As shown, the relay also includes an electromagnetic component 50, which is located on the side of the first housing 10 away from the isolation plate 20. The electromagnetic component 50 is connected to the first housing 10, and a connecting part 511 is provided on the outer surface of the electromagnetic component 50.

[0064] In this embodiment of the application, an electromagnetic component 50 is provided on the side of the first housing 10 away from the isolation plate 20, and a connecting part 511 is provided on the outer surface of the electromagnetic component 50. The connecting part 511 is used to connect the relay to other external devices, such as a power distribution box. This connection method has a simple structure and is easy to install.

[0065] Specifically, a plurality of connecting portions 511 are provided on the outer surface of the electromagnetic component 50. The plurality of connecting portions 511 are arranged at intervals. For example, the connecting portion 511 can be a boss, and a groove is provided at the corresponding position of the distribution box. The boss and the groove are engaged to realize the connection and fixation between the relay and the distribution box. Of course, the specific number and setting position of the connecting portions 511 can be flexibly set according to actual needs, and the embodiments of this application do not limit them.

[0066] It should be noted that relays in related technologies are typically equipped with a housing, which serves as insulation protection and a connection to the distribution box. However, the housing can affect the relay's heat dissipation. The relay provided in this application, however, integrates the ceramic isolation plate 20 and the ceramic first housing 10 into a single unit. This eliminates the need for an additional housing, achieving both insulation and improved heat dissipation. This enhances the reliability and stability of the relay's operation, prevents excessive relay temperature rise that could pose environmental safety risks, and improves the overall safety performance of the battery pack.

[0067] Optionally, such as Figure 4 As shown, the electromagnetic component 50 includes a second housing 51 and a coil 52; the second housing 51 is connected to the first housing 10, and the second housing 51 has a receiving cavity 512, the coil 52 is disposed in the receiving cavity 512, and the connecting part 511 protrudes from the outer surface of the second housing 51.

[0068] In this embodiment, a coil 52 is provided in the receiving cavity 512 of the second housing 51. When the coil 52 is energized, it generates a magnetic field to drive the mechanical movement of the moving contact in the relay, thereby realizing the on / off control of the circuit.

[0069] Specifically, the relay also includes a moving contact and an iron core. The coil 52 is wound around the iron core, and the coil 52 is provided with a power supply terminal, which is connected to an external power source. When the coil 52 is energized, it generates a magnetic field. The electromagnetic force generated by the iron core and the coil 52 drives the moving contact to move, so that the moving contact makes contact with or breaks contact with the stationary contact, thereby realizing the on / off control of the relay.

[0070] Optionally, this application also proposes a power distribution box, including a connection terminal and a relay as described in the above embodiments, wherein the connection terminal is electrically connected to the first segment 31 and the second segment 41 respectively.

[0071] In the embodiments of this application, the relay is used to control the on / off state of the circuit in the distribution box by electrically connecting the connection terminal to the first segment 31 and the second segment 41 of the relay. In the embodiments of this application, an isolation plate 20 is provided between the first segment 31 of the first stationary contact terminal 30 and the second segment 41 of the second stationary contact terminal 40 to form an isolation between the first stationary contact terminal 30 and the second stationary contact terminal 40. The isolation plate 20 increases the creepage distance and electrical clearance between the first segment 31 of the first stationary contact terminal 30 and the second segment 41 of the second stationary contact terminal 40, thereby reducing the risk of leakage between the first stationary contact terminal 30 and the second stationary contact terminal 40 and improving the insulation performance of the relay to meet the insulation requirements of the high-voltage battery pack. Meanwhile, by setting the isolation plate 20 and the first housing 10 as an integrally formed structure, this application can not only improve the connection strength between the isolation plate 20 and the first housing 10 and prevent the isolation plate 20 and the first housing 10 from falling off during use, thereby ensuring that the isolation plate 20 forms an insulating isolation effect between the first stationary contact terminal 30 and the second stationary contact terminal 40, but also facilitate the assembly and use of the relay.

[0072] Optionally, embodiments of this application also propose a battery pack, including the power distribution box described in the above embodiments.

[0073] In the embodiments of this application, an isolation plate 20 is provided between the first segment 31 of the first stationary contact terminal 30 and the second segment 41 of the second stationary contact terminal 40 to form an isolation between the first stationary contact terminal 30 and the second stationary contact terminal 40. This isolation plate 20 increases the creepage distance and electrical clearance between the first segment 31 of the first stationary contact terminal 30 and the second segment 41 of the second stationary contact terminal 40, thereby reducing the risk of leakage between the first stationary contact terminal 30 and the second stationary contact terminal 40. This improves the insulation performance of the relay, enabling it to meet the insulation requirements of the high-voltage battery pack. Furthermore, by making the isolation plate 20 and the first housing 10 an integrally formed structure, this not only enhances the connection strength between the isolation plate 20 and the first housing 10, preventing them from detaching during use, but also ensures that the isolation plate 20 provides insulation between the first stationary contact terminal 30 and the second stationary contact terminal 40, facilitating the assembly and use of the relay.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do 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 one or more embodiments or examples.

[0075] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A relay, characterized in that, include: First housing (10), isolation plate (20), first stationary contact terminal (30), and second stationary contact terminal (40); The first stationary contact terminal (30) passes through the first housing (10) and has a first section (31) exposed outside the first housing (10); the second stationary contact terminal (40) passes through the first housing (10) and has a second section (41) exposed outside the first housing (10). The isolation plate (20) is integrally formed with the first housing (10), and the isolation plate (20) is disposed between the first section (31) and the second section (41).

2. The relay according to claim 1, characterized in that, The isolation plate (20) includes a first end (21) and a second end (22) disposed opposite to each other. The first end (21) is connected to the first housing (10), and the second end (22) extends toward the end away from the first housing (10). The thickness of the isolation plate (20) gradually decreases from the first end (21) to the second end (22).

3. The relay according to claim 1, characterized in that, The side of the isolation plate (20) facing away from the first housing (10) is higher than the side of the first segment (31) facing away from the first housing (10); And / or, the side of the partition plate (20) facing away from the first housing (10) is higher than the side of the second segment (41) facing away from the first housing (10).

4. The relay according to claim 1, characterized in that, The first housing (10) has a first mounting hole (13) and a second mounting hole (14) arranged at intervals on the side facing the isolation plate (20). The first stationary contact terminal (30) passes through the first mounting hole (13), and the second stationary contact terminal (40) passes through the second mounting hole (14). The first housing (10) has a first boss (23) on the side facing the isolation plate (20), and the first boss (23) surrounds the first mounting hole (13). And / or, the first housing (10) is provided with a second boss (24) on the side facing the isolation plate (20), and the second boss (24) is arranged around the second mounting hole (14).

5. The relay according to claim 1, characterized in that, The first housing (10) includes a main body (11) and a protrusion (12); the protrusion (12) is connected to the main body (11), and the isolation plate (20) is disposed on the side of the protrusion (12) away from the main body (11); the first stationary contact terminal (30) and the second stationary contact terminal (40) are both disposed through the protrusion (12); The height direction of the relay is the first direction (X), and the second direction (Y) intersects the first direction (X). Along the first direction (X), the projected area of ​​the protrusion (12) is smaller than the projected area of ​​the main body (11). The isolation plate (20) extends from one side of the protrusion (12) to the other side along the second direction (Y).

6. The relay according to any one of claims 1-5, characterized in that, The first housing (10) is a ceramic housing, and the isolation plate (20) is a ceramic isolation plate.

7. The relay according to any one of claims 1-5, characterized in that, The relay also includes an electromagnetic component (50), which is located on the side of the first housing (10) away from the isolation plate (20). The electromagnetic component (50) is connected to the first housing (10), and a connecting portion (511) is provided on the outer surface of the electromagnetic component (50).

8. The relay according to claim 7, characterized in that, The electromagnetic component (50) includes a second housing (51) and a coil (52); The second housing (51) is connected to the first housing (10). The second housing (51) has a receiving cavity (512) inside, the coil (52) is disposed in the receiving cavity (512), and the connecting part (511) protrudes from the outer surface of the second housing (51).

9. A power distribution box, characterized in that, It includes a connection terminal and a relay as described in any one of claims 1-8, wherein the connection terminal is electrically connected to the first segment (31) and the second segment (41), respectively.

10. A battery pack, characterized in that, Includes the power distribution box as described in claim 9.

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