Relay assembly, battery pack assembly, and electrical device

Abstract

The utility model discloses a relay assembly, battery pack assembly and electrical equipment relates to electrical equipment technical field, aims at solving how improves the stability and accuracy of the problem of the installation of relay body and battery pack body. The relay assembly is used for battery pack assembly, and the battery pack assembly includes battery pack body, and the relay assembly includes relay body, base and electric connecting piece, and the base is suitable for connecting battery pack body, and the relay body is connected in the base, and the electric connecting piece is connected between the relay body and the base, and is suitable for the electric connection with battery pack body.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and more particularly to relay assemblies, battery pack assemblies, and electrical equipment. Background Technology

[0002] With the rapid development of new energy technologies, electrical equipment such as electric vehicles has been widely used. These devices typically require a battery pack assembly for power. The battery pack assembly includes the battery pack body and relay assemblies connected to it. These relay assemblies provide stable power to the electrical equipment and ensure its safe operation.

[0003] In the existing technology, the stability and accuracy of the assembly of relay components and battery pack body are poor, which affects the assembly efficiency of relay components and battery pack body. Utility Model Content

[0004] The purpose of this application is to provide a relay assembly, a battery pack assembly, and an electrical device, aiming to solve the problem of how to improve the assembly efficiency of the relay body and the battery pack body.

[0005] In a first aspect, a relay assembly is provided for use in a battery pack assembly, the battery pack assembly including a battery pack body, the relay assembly including a relay body, a base and an electrical connector, the base being adapted to connect to the battery pack body, the relay body being connected to the base; the electrical connector being connected between the relay body and the base and adapted to be electrically connected to the battery pack body.

[0006] This allows the relay body, base, and electrical connectors to be assembled into a single unit, which is then connected to the battery pack body in the battery pack assembly. This facilitates the assembly of the relay body and the battery pack body, improving assembly efficiency. It also reduces the blind spot during the assembly of the relay body and the battery pack body, ensuring the stability and accuracy of the installation. This reduces the time required to adjust the stability and accuracy when connecting the relay body and the battery pack body, further improving assembly efficiency.

[0007] In some embodiments, the electrical connectors surround the base.

[0008] In some embodiments, the base is provided with a receiving cavity having an opening, and at least a portion of the relay body is disposed within the receiving cavity.

[0009] In some embodiments, the accommodating cavity further includes a first inner wall surface opposite to the opening; at least a portion of the electrical connector is disposed on the side of the opening opposite to the first inner wall surface.

[0010] In some embodiments, the base is provided with a first connection hole, which extends from the first inner wall surface in a direction opposite to the opening, and the first connection hole is adapted to connect the battery pack body.

[0011] In some embodiments, the relay assembly further includes a first bushing disposed within a first connection hole and extending circumferentially along the first connection hole.

[0012] In some embodiments, the relay body passes through the opening so that a portion of the relay body is located outside the receiving cavity.

[0013] In some embodiments, the portion of the relay body located outside the accommodating cavity includes a first surface facing away from the opening; a portion of the electrical connector is located on the side of the first surface facing away from the opening and is connected to the first surface.

[0014] In some embodiments, the electrical connector includes a first electrical connector and a second electrical connector. The first electrical connector is connected between the relay body and the base, and at least a portion of the first electrical connector is located on the side of the opening facing away from the first inner wall surface. The second electrical connector surrounds the base and is electrically connected to the first electrical connector. The second electrical connector is adapted to be electrically connected to the battery pack body.

[0015] In some embodiments, the base includes a second surface with an opening on the second surface; a first electrical connector is connected between the second surface and the first surface.

[0016] In some embodiments, the first electrical connector includes a first plate portion, a second plate portion, and a third plate portion, wherein the first plate portion is connected to a first surface, the second plate portion is connected to a second surface, and the third plate portion is connected between the first plate portion and the second plate portion.

[0017] In some embodiments, the third plate is a flexible structure.

[0018] In some embodiments, the first surface is provided with a first mounting hole, and the first plate portion is provided with a second mounting hole; the relay assembly further includes a first fastener, which passes through the first mounting hole and the second mounting hole.

[0019] In some embodiments, the relay assembly further includes a second bushing disposed in the second mounting hole and / or the first mounting hole, and extending circumferentially along the second mounting hole.

[0020] In some embodiments, the second surface is provided with a third mounting hole, and the second plate portion is provided with a fourth mounting hole; the relay assembly further includes a second fastener, which passes through the third mounting hole and the fourth mounting hole.

[0021] In some embodiments, the relay assembly further includes a third bushing disposed in and / or in the fourth mounting hole and extending circumferentially along the fourth mounting hole.

[0022] In some embodiments, the first electrical connection is a first copper busbar.

[0023] In some embodiments, the base includes a base bottom and a protective portion disposed on the base bottom. The base bottom is adapted to be connected to the battery pack body, and the protective portion has a receiving cavity, the opening of which is oriented perpendicular to the arrangement direction of the base bottom and the protective portion.

[0024] In some embodiments, the substrate is provided with a second connection hole, which is adapted to connect the battery pack body.

[0025] In some embodiments, the relay assembly further includes a fourth bushing disposed within the second connection hole and extending circumferentially along the second connection hole.

[0026] In some embodiments, a portion of the fourth bushing is located on the side of the base facing the protective portion.

[0027] In some embodiments, the substrate is further provided with a third connection hole, the third connection hole and the second connection hole are arranged along a first direction, the first direction being perpendicular to the plane where the opening is located; at least one of the second connection hole and the third connection hole extends into an elongated shape along the first direction.

[0028] In some embodiments, the base further includes a third surface, which is the surface of the protective portion facing away from the base bottom; the second electrical connector is connected between the first electrical connector and the third surface.

[0029] In some embodiments, the second electrical connector includes a fourth plate portion, a fifth plate portion, and a sixth plate portion. The fourth plate portion is connected to the first electrical connector, the fifth plate portion is connected to the third surface, and is adapted to be electrically connected to the battery pack body; the sixth plate portion is connected between the fourth plate portion and the fifth plate portion.

[0030] In some embodiments, the base includes a second surface, and an opening is provided on the second surface; the first electrical connector includes a second plate portion connected to the second surface; and a fourth plate portion is connected to the second surface and to the second plate portion.

[0031] In some embodiments, the second surface is provided with a third mounting hole, the second plate portion is provided with a fourth mounting hole, and the fourth plate portion is provided with a fifth mounting hole; the relay assembly further includes a second fastener, which passes through the third mounting hole, the fourth mounting hole, and the fifth mounting hole.

[0032] In some embodiments, the third surface is provided with a sixth mounting hole, and the fifth plate portion is provided with a seventh mounting hole; the relay assembly further includes a third fastener, which passes through the sixth mounting hole and the seventh mounting hole.

[0033] In some embodiments, the protective portion further includes a fourth surface, which is connected between the third surface and the base and is adjacent to the surface where the opening is located; a sixth plate portion is disposed on the side facing the fourth surface.

[0034] In some embodiments, the electrical connector further includes a third electrical connector and a fourth electrical connector, the third electrical connector being connected between the relay body and the base, and at least a portion of the third electrical connector being located on the side of the opening facing away from the first inner wall surface; the fourth electrical connector surrounding the base and being electrically connected to the third electrical connector, the fourth electrical connector being adapted to be electrically connected to the battery pack body.

[0035] The first electrical connector and the second electrical connector form a first assembly, and the third electrical connector and the fourth electrical connector form a second assembly. One of the first assembly and the second assembly is connected to the positive terminal of the relay body, and the other of the first assembly and the second assembly is connected to the negative terminal of the relay body.

[0036] In some embodiments, the second electrical connector includes an aluminum busbar portion and a copper busbar portion, the copper busbar portion being electrically connected to the first electrical connector. The aluminum busbar portion is electrically connected to the copper busbar portion and is adapted to be electrically connected to the battery pack body.

[0037] In some embodiments, the relay assembly further includes a protective cover connected to the base and defining a protective space between the cover and the base, wherein the protective portion and the electrical connector are disposed within the protective space.

[0038] In some embodiments, the base further includes a third surface, which is the surface of the protective portion facing away from the base bottom; the second electrical connector includes a fifth plate portion connected to the third surface and adapted to be electrically connected to the battery pack body; the protective cover includes a cover body and a folding portion, the cover body and the base bottom defining a protective space; the cover body has a notch located on the side of the fifth plate portion facing away from the third surface, and the folding portion is located at the notch and folds along the direction of the fifth plate portion facing away from the third surface.

[0039] In some embodiments, one of the protective cover and the base is provided with a snap-fit ​​hole, and the other of the protective cover and the base is provided with a snap-fit ​​protrusion, which snaps into the snap-fit ​​hole.

[0040] Secondly, a battery pack assembly including a relay assembly is also provided.

[0041] In some embodiments, the battery pack assembly further includes a battery pack body, to which a relay assembly is connected.

[0042] Thirdly, an electrical device is provided, including a relay assembly or a battery pack assembly. Attached Figure Description

[0043] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0045] Figure 2 This application provides a schematic diagram of the structure of a relay assembly according to some embodiments;

[0046] Figure 3 for Figure 2 The diagram shows the structure of the base in the relay assembly.

[0047] Figure 4 for Figure 2 A partial structural schematic diagram of the relay assembly shown;

[0048] Figure 5 for Figure 2 A schematic diagram showing the relationship between the first and third electrical connectors in the relay assembly shown.

[0049] Figure 6 for Figure 5 A top view showing the relationship between the first and third electrical connectors;

[0050] Figure 7 for Figure 3 Top view of the base shown;

[0051] Figure 8 for Figure 2 A schematic diagram showing the relationship between the second and fourth electrical connectors in the relay assembly shown.

[0052] Figure 9 for Figure 8 A top view showing the relationship between the second and fourth electrical connectors;

[0053] Figure 10 for Figure 2 A schematic diagram of one structure of the protective cover in the relay assembly shown;

[0054] Figure 11 for Figure 2 This is a schematic diagram of another structure of the protective cover in the relay assembly shown.

[0055] Figure label:

[0056] 1000. Electrical equipment; 100. Relay assembly;

[0057] 1. Relay body; 11. First surface; 111. First mounting hole;

[0058] 2. Base; 21. Receiving cavity; 211. Opening; 212. First inner wall surface; 22. First connecting hole; 23. Second surface; 231. Third mounting hole; 24. Bottom of base; 241. Second connecting hole; 242. Third connecting hole; 25. Protective part; 251. Fourth surface; 26. Third surface; 261. Sixth mounting hole;

[0059] 3. Electrical connector; 31. First electrical connector; 311. First plate; 311A. Second mounting hole; 312. Second plate; 312A. Fourth mounting hole; 313. Third plate; 32. Second electrical connector; 32A. Aluminum busbar adapter; 32B. Copper busbar adapter; 321. Fourth plate; 321A. Fifth mounting hole; 322. Fifth plate; 322A. Seventh mounting hole; 323. Sixth plate; 33. Third electrical connector; 34. Fourth electrical connector;

[0060] 4. First bushing;

[0061] 5. Fourth bushing;

[0062] 6. Protective cover; 61. Cover body; 62. Folding part; 63. Snap-fit ​​hole; 64. Snap-fit ​​boss. Detailed Implementation

[0063] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.

[0064] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0065] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0066] In the embodiments of this application, "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, said acceptable deviation range being determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range for approximate parallelism may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range for approximate perpendicularity may also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0067] This application provides an electrical appliance 1000, which can be a ship, aircraft, vehicle, etc. This application uses a vehicle as an example to illustrate the electrical appliance 1000. The vehicle can be a hybrid electric vehicle, a pure electric vehicle, etc. The vehicle can also be a sedan, bus, truck, etc.

[0068] like Figure 1 As shown, Figure 1 The diagram illustrates the structure of a vehicle according to some embodiments of this application. The vehicle may include a body, wheels, and a drive assembly. The body is used to carry people or goods, and the wheels are connected to the underside of the body and are capable of rolling on a road surface to move the body. The drive assembly is connected to the body and is used to drive the wheels to rotate, thereby causing the wheels to roll on the road surface. For example, the drive assembly may be a drive motor, or it may include a drive motor and an engine, or it may include a drive motor, an engine, and a generator.

[0069] The drive assembly may also include a battery pack assembly connected to the vehicle body and to a drive motor for supplying electrical energy to the drive motor to drive the wheels. The battery pack assembly may also be connected to a generator to charge the battery pack assembly by generating electricity from the generator.

[0070] The battery pack assembly is the core device for storing electrical energy in new energy vehicles. It consists of multiple battery modules, a battery management system (BMS), a housing and thermal management system, and an electrical system. Its main function is to provide stable power to the equipment and ensure safe operation.

[0071] In some embodiments, the battery pack assembly may include a relay assembly 100. After a relay failure occurs in the battery pack assembly, the faulty relay can be replaced through a repair port on the pack body. Design requirements ensure that the assembly of the pack body on the vehicle does not affect the overall vehicle structure; therefore, the repair port cannot be located on the top cover, but rather on the pack body frame beam. When an emergency fault such as a collision, short circuit, or thermal runaway is detected, the battery management system (BMS) immediately disconnects the positive and negative terminals of the relay, completely cutting off the high-voltage output to prevent the battery pack assembly from continuing to supply power and causing safety hazards. By monitoring the battery status in real time, the relay automatically cuts off the charging and discharging circuit when the voltage or current exceeds a threshold, preventing performance degradation or thermal runaway due to overcharging or over-discharging.

[0072] In some embodiments, the battery pack assembly further includes a battery pack body, to which the relay assembly 100 is connected.

[0073] In this way, the battery pack body can support the relay assembly 100, ensuring the stability of the relay assembly 100 installed within the battery pack body.

[0074] Based on this, please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a relay assembly 100 provided in some embodiments of this application. The relay assembly 100 is used in a battery pack assembly, which includes a battery pack body. The relay assembly 100 may include a relay body 1, a base 2, and an electrical connector 3. The base 2 is adapted to connect to the battery pack body, and the relay body 1 is connected to the base 2. The electrical connector 3 is connected between the relay body 1 and the base 2 and is adapted to be electrically connected to the battery pack body.

[0075] In this way, the relay body 1, base 2, and electrical connector 3 can be assembled into a whole, and then this whole can be connected to the battery pack body in the battery pack assembly. This facilitates the assembly of the relay body 1 and the battery pack body, thereby improving assembly efficiency. It also reduces the blind spot during the assembly of the relay body 1 and the battery pack body, ensuring the stability and accuracy of the installation of the relay body 1 and the battery pack body. This reduces the time required to adjust the stability and accuracy when connecting the relay body 1 and the battery pack body, further improving assembly efficiency.

[0076] In some embodiments, the electrical connector 3 surrounds the base 2 to improve the stability of the connection between the electrical connector 3 and the base 2, and to increase the length of the electrical connector 3 to improve the heat dissipation effect of the electrical connector 3.

[0077] In some other implementations, the electrical connector may also be connected to one side of the base 2.

[0078] In some embodiments, please refer to Figure 3 , Figure 3for Figure 2 The diagram shows the structure of the base 2 in the relay assembly 100. The base 2 is provided with a receiving cavity 21, which has an opening 211, and at least a portion of the relay body 1 is disposed within the receiving cavity 21.

[0079] In this way, the relay body 1 can be protected by the base 2, and the relay body 1 can be taken out and installed into the receiving cavity 21 through the opening 211, which facilitates the maintenance and replacement of the relay body 1.

[0080] In some other embodiments, the relay body 1 can also be mounted on one side surface of the base 2, which also facilitates the maintenance and replacement of the relay body 1.

[0081] In some embodiments, the accommodating cavity 21 further includes a first inner wall surface 212 opposite to the opening 211; at least a portion of the electrical connector 3 is disposed on the side of the opening 211 opposite to the first inner wall surface 212.

[0082] In this way, connecting the electrical connector 3 to the relay at the opening 211 facilitates the connection between the electrical connector 3 and the relay body 1, improving connection efficiency.

[0083] In some other embodiments, the electrical connector 3 may also be located at other positions on the base 2, such as on one side of the opening 211, and electrically connected to the relay body 1 via wires or the like.

[0084] In some embodiments, the base 2 is provided with a first connection hole 22, which extends from the first inner wall surface 212 in a direction opposite to the opening 211, and the first connection hole 22 is adapted to connect the relay body 1.

[0085] By extending the first connection hole 22 from the first inner wall surface 212 in a direction opposite to the opening 211, the base 2 and the relay body 1 are connected through the first connection hole 22, so that the battery pack body will not affect the maintenance and replacement of the relay body 1, thereby further facilitating the maintenance and replacement of the relay body 1.

[0086] In some examples, the base 2 and the battery pack body can be fixed together by fasteners passing through the first connection hole 22 and the hole on the battery pack body. For example, the fasteners can be bolts, screws, etc.

[0087] In some examples, the number of first connecting holes 22 can be one, while in other examples, the number of first connecting holes 22 can be multiple, such as two, three, four, etc. This application does not make a specific limitation on this.

[0088] In some embodiments, the relay assembly 100 further includes a first bushing 4 disposed within the first connection hole 22 and extending circumferentially along the first connection hole 22.

[0089] In this way, the first bushing 4 can make the fastener and the base 2 more tightly connected after the fastener passes through the first connection hole 22, so as to prevent the fastener from loosening and affecting the connection effect between the base 2 and the relay body 1. In addition, it can also provide insulation protection.

[0090] In some examples, the first bushing 4 can be a carbon steel bushing, such as a zinc-nickel plated steel bushing, etc.

[0091] In some other embodiments, the base 2 and the battery pack body can also be connected by snap-fitting, welding, riveting, etc., and this application does not make specific limitations in this regard.

[0092] In some embodiments, please refer to Figure 4 , Figure 4 for Figure 2 The diagram shows a partial structural schematic of the relay assembly 100. The relay body 1 passes through the opening 211, so that a portion of the relay body 1 is located outside the receiving cavity 21.

[0093] In this way, it is easier to remove the relay body 1 and install it into the receiving cavity 21, thus making it easier to repair and replace the relay body 1.

[0094] In some other embodiments, the relay body 1 may also be completely housed within the receiving cavity 21. This allows the relay body 1 to be removed and installed through the opening 211.

[0095] In some embodiments, the portion of the relay body 1 located outside the accommodating cavity 21 includes a first surface 11 facing away from the opening 211; a portion of the electrical connector 3 is located on the side of the first surface 11 facing away from the opening 211 and is connected to the first surface 11.

[0096] In this way, when the electrical connector 3 and the first surface 11 of the relay body 1 are connected, they are outside the accommodating cavity 21, which is less restricted by space, making it easier to connect the electrical connector 3 and the first surface 11 of the relay body 1 and improving the connection efficiency.

[0097] In other embodiments, the electrical connector 3 may also be connected to other locations on the relay body 1, such as to a surface adjacent to the first surface 11, etc.

[0098] In some embodiments, please continue reading Figures 2 to 4The electrical connector 3 includes a first electrical connector 31 and a second electrical connector 32. The first electrical connector 31 is connected between the relay body 1 and the base 2, and at least a portion of the first electrical connector 31 is located on the side of the opening 211 facing away from the first inner wall surface 212. The second electrical connector 32 surrounds the base 2 and is electrically connected to the first electrical connector 31. The second electrical connector 32 is adapted to be electrically connected to the battery pack body.

[0099] This facilitates the installation of the electrical connector 3 on the base 2 and improves the connection efficiency between the electrical connector 3 and the base 2.

[0100] In some other embodiments, the electrical connector 3 may also be an integral structure.

[0101] In some embodiments, the base 2 includes a second surface 23, and an opening 211 is provided on the second surface 23; a first electrical connector 31 is connected between the second surface 23 and the first surface 11.

[0102] In this way, the space on the side facing the first surface 11 and the second surface 23 is larger, and the first electrical connector 31 is connected between the second surface 23 and the first surface 11, which makes it easier to connect the first electrical connector 31.

[0103] In some other embodiments, the first electrical connector 31 may also be connected between the first surface 11 and other surfaces of the base 2, which is not specifically limited in this application.

[0104] In some embodiments, please refer to Figures 2 to 5 , Figure 5 for Figure 2 The diagram shows the relationship between the first electrical connector 31 and the third electrical connector 33 in the relay assembly 100. The first electrical connector 31 includes a first plate portion 311, a second plate portion 312, and a third plate portion 313. The first plate portion 311 is connected to the first surface 11, the second plate portion 312 is connected to the second surface 23, and the third plate portion 313 is connected between the first plate portion 311 and the second plate portion 312.

[0105] In this way, the structure of the first electrical connector 31 can be made more compact, thereby reducing the space occupied by the first electrical connector 31 on the relay assembly 100.

[0106] In some examples, the first electrical connector 31 can be an arc-shaped structure, a wave-shaped structure, etc. In other examples, the first electrical connector 31 can also be a rod-shaped structure, etc.

[0107] In some embodiments, the third plate portion 313 is a flexible structure. For example, the third plate portion 313 is a copper busbar structure made of soft copper material. The first plate portion 311 and the second plate portion 312 can be copper busbar structures made of hard copper material to improve the structural strength of the first electrical connector 31.

[0108] In this way, when the first plate portion 311 is connected to the first surface 11, and the second plate portion 312 is connected to the second surface 23, the third plate portion 313 can easily deform to absorb the connection error, so as to make the connection between the first plate portion 311 and the first surface 11, and the connection between the second plate portion 312 and the second surface 23 more stable.

[0109] In some embodiments, please refer to Figures 2 to 6 , Figure 6 for Figure 5 The diagram shows a top view of the relationship between the first electrical connector 31 and the third electrical connector 33. The first surface 11 is provided with a first mounting hole 111, and the first plate portion 311 is provided with a second mounting hole 311A. The relay assembly 100 also includes a first fastener, which passes through the first mounting hole 111 and the second mounting hole 311A.

[0110] In this way, the connection between the relay body 1 and the first electrical connector 31 is simple and convenient, which improves the connection efficiency. In addition, it is easy to disassemble, thus facilitating the assembly and disassembly of the relay body 1.

[0111] In some examples, the number of first mounting holes 111 and second mounting holes 311A ​​can be one or more.

[0112] In some examples, the first fastener can be a bolt, threaded rod, screw, pin, etc.

[0113] In other embodiments, the connection between the first surface 11 and the first plate portion 311 can also be welding, snap-fitting, riveting, etc.

[0114] In some embodiments, the relay assembly 100 further includes a second bushing disposed within the second mounting hole 311A ​​and / or the first mounting hole 111, and extending circumferentially along the second mounting hole 311A. That is, the second bushing may be disposed within the second mounting hole 311A, or the second bushing may be disposed within the first mounting hole 111, or the second bushing may be disposed within both the first mounting hole 111 and the second mounting hole 311A.

[0115] In this way, the second bushing can make the connection between the fastener and the first electrical connector 31 tighter after the fastener passes through the second mounting hole 311A ​​and / or the first mounting hole 111, so as to prevent the fastener from loosening and affecting the connection effect between the first electrical connector 31 and the relay body 1.

[0116] In some examples, the second bushing can be a carbon steel bushing, such as a zinc-nickel plated steel bushing, etc.

[0117] In some embodiments, the second surface 23 is provided with a third mounting hole 231, and the second plate portion 312 is provided with a fourth mounting hole 312A; the relay assembly 100 also includes a second fastener, which passes through the third mounting hole 231 and the fourth mounting hole 312A.

[0118] In this way, the connection between the base 2 and the first electrical connector 31 is simple and convenient, which improves the connection efficiency. In addition, it is easy to disassemble, thus facilitating the assembly and disassembly of the relay body 1.

[0119] In some examples, the number of third mounting holes 231 and fourth mounting holes 312A can be one or more.

[0120] In some examples, the second fastener can be a bolt, threaded rod, screw, pin, etc.

[0121] In some embodiments, the relay assembly 100 further includes a third bushing disposed in the fourth mounting hole 312A and / or the third mounting hole 231, and extending circumferentially along the fourth mounting hole 312A. That is, the third bushing may be disposed within the third mounting hole 231, or the third bushing may be disposed within the fourth mounting hole 312A, or the third bushing may be disposed within both the third mounting hole 231 and the fourth mounting hole 312A.

[0122] In this way, the third bushing can make the connection between the fastener and the first electrical connector 31 tighter after the fastener passes through the fourth mounting hole 312A and / or the third mounting hole 231, so as to prevent the fastener from loosening and affecting the connection between the first electrical connector 31 and the base 2.

[0123] In some examples, the third bushing can be a carbon steel bushing, such as a zinc-nickel plated steel bushing, etc.

[0124] In some embodiments, the first electrical connector 31 is a first copper busbar, wherein the first copper busbar has good conductivity and can improve conductivity efficiency.

[0125] In some other embodiments, the first electrical connector 31 may also be an aluminum busbar, a silver busbar, etc.

[0126] In some embodiments, please refer to Figures 2 to 7 , Figure 7 for Figure 3 The diagram shows a top view of the base 2. The base 2 includes a base 24 and a protective portion 25 disposed on the base 24. The base 24 is adapted to be connected to the battery pack body. The protective portion 25 is provided with a receiving cavity 21. The opening 211 of the receiving cavity 21 is oriented perpendicular to the arrangement direction of the base 24 and the protective portion 25.

[0127] This arrangement further improves the connection stability between the base 2 and the battery pack body. Furthermore, this arrangement transforms the horizontal mounting of the relay body 1 within the battery pack body into a vertical mounting relative to the base 2, further facilitating installation and reducing blind spots, among other benefits.

[0128] In some examples, the base 24 can be a plate-like structure, a block-like structure, etc.

[0129] In some examples, the protective part 25 can be a block structure, a square structure, a cylindrical structure, an irregular structure, etc.

[0130] In some embodiments, a second connection hole 241 is provided on the base 24, which is adapted to connect the battery pack body.

[0131] In this way, after the base 2 is connected to the battery pack body through the second connection hole 241, the battery pack body will not affect the maintenance and replacement of the relay body 1, so as to further facilitate the maintenance and replacement of the relay body 1.

[0132] In some examples, the base 2 and the battery pack body can be fixed together by fasteners passing through the second connection hole 241 and the hole on the battery pack body. For example, the fasteners can be bolts, screws, etc.

[0133] In some embodiments, the relay assembly 100 further includes a fourth bushing 5 disposed within the second connection hole 241 and extending circumferentially along the second connection hole 241.

[0134] In this way, the fourth bushing 5 can make the fastener and the base 2 more tightly connected after the fastener passes through the second connection hole 241, so as to prevent the fastener from loosening and affecting the connection between the base 2 and the battery pack body. In addition, it can also provide insulation protection.

[0135] In some examples, the fourth bushing 5 can be a carbon steel bushing, such as a zinc-nickel plated steel bushing, etc.

[0136] In some other embodiments, the base 2 and the battery pack body can also be connected by snap-fitting, welding, riveting, etc., and this application does not make specific limitations in this regard.

[0137] In some embodiments, a portion of the fourth bushing 5 is located on the side of the base 24 facing the protective portion 25.

[0138] In this way, after the fixing bolt is assembled into the second connecting hole 241, the mating surface presses against the upper surface of the fourth bushing 5 to prevent torque attenuation during use.

[0139] In some examples, the distance between the side surface of the fourth bushing 5 facing the protective part 25 and the side surface of the base 24 facing the protective part 25 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. For example, this distance can be 0.1 mm, 0.2 mm, 0.3 mm, etc.

[0140] In some embodiments, a third connecting hole 242 is further provided on the base 24, and the third connecting hole 242 and the second connecting hole 241 are along a first direction (e.g., Figure 3 The orientations shown (A) are arranged such that the first direction is perpendicular to the plane where the opening 211 is located; at least one of the second connecting hole 241 and the third connecting hole 242 extends into an elongated shape along the first direction. That is, the second connecting hole 241 can extend into an elongated shape along the first direction, or the third connecting hole 242 can extend into an elongated shape along the first direction, or both the second connecting hole 241 and the third connecting hole 242 can extend into an elongated shape along the first direction.

[0141] In this way, once one of the second connecting hole 241 and the third connecting hole 242 is aligned and fixed with the hole on the battery pack body, even if the other hole deviates from the hole on the battery pack body, the other hole 241 and the third connecting hole 242 can still be connected with the hole on the battery pack body. This can absorb installation tolerances and ensure the smooth installation of the base 2 and the battery pack body.

[0142] In some examples, the number of second connecting holes 241 can be one, or the number of first connecting holes 22 can be multiple, such as two, three, four, etc. This application does not make specific limitations on this.

[0143] In some examples, the third connecting hole 242 and the second connecting hole 241 may be arranged perpendicular to the first direction.

[0144] This application is illustrated by way of example with the third connecting hole 242 extending in a strip shape along the first direction.

[0145] In some embodiments, the base 2 further includes a third surface 26, which is the surface of the protective part 25 facing away from the base 24; the second electrical connector 32 is connected between the first electrical connector 31 and the third surface 26.

[0146] In this way, the third surface 26 is relatively close to the lead-out aluminum busbar of the battery pack body and is less affected by the battery pack body, which facilitates the connection between the second connector and the lead-out aluminum busbar of the battery pack body.

[0147] In some other embodiments, the second electrical connector 32 may also be connected to other surfaces of the base 2, which is not specifically limited in this application.

[0148] In some embodiments, please refer to Figures 2 to 8 , Figure 8 for Figure 2 The diagram shows the relationship between the second electrical connector 32 and the fourth electrical connector 34 in the relay assembly 100. The second electrical connector 32 includes a fourth plate portion 321, a fifth plate portion 322, and a sixth plate portion 323. The fourth plate portion 321 is connected to the first electrical connector 31, the fifth plate portion 322 is connected to the third surface 26, and is adapted to be electrically connected to the battery pack body; the sixth plate portion 323 is connected between the fourth plate portion 321 and the fifth plate portion 322.

[0149] In this way, the structure of the second electrical connector 32 can be made more compact, thereby reducing the space occupied by the second electrical connector 32 on the relay assembly 100.

[0150] In some examples, the second electrical connector 32 can be an arc-shaped structure, a wave-shaped structure, etc. In other examples, the first electrical connector 31 can also be a rod-shaped structure, etc.

[0151] In some embodiments, the base 2 includes a second surface 23, and an opening 211 is provided on the second surface 23; the first electrical connector 31 includes a second plate portion 312, which is connected to the second surface 23; and a fourth plate portion 321 is connected to the second surface 23 and to the second plate portion 312.

[0152] In this way, the structure of the first electrical connector 31 and the second electrical connector 32 can be made more compact, thereby reducing the volume of the relay assembly 100 and further reducing the space occupied by the relay assembly 100 in the battery pack assembly.

[0153] In some embodiments, please refer to Figures 2 to 9 , Figure 9 for Figure 8 The diagram shows a top view illustrating the relationship between the second electrical connector 32 and the fourth electrical connector 34. The second surface 23 has a third mounting hole 231, the second plate portion 312 has a fourth mounting hole 312A, and the fourth plate portion 321 has a fifth mounting hole 321A. The relay assembly 100 also includes a second fastener, which passes through the third mounting hole 231, the fourth mounting hole 312A, and the fifth mounting hole 321A.

[0154] In this way, the connection between the base 2, the first electrical connector 31 and the second electrical connector 32 is simple and convenient, which improves the connection efficiency. In addition, it is easy to disassemble, thus facilitating the assembly and disassembly of the relay body 1.

[0155] In some examples, the number of fifth mounting holes 321A can be one or more.

[0156] In some examples, the second fastener can be a bolt, threaded rod, screw, pin, etc.

[0157] In some embodiments, the third surface 26 is provided with a sixth mounting hole 261, and the fifth plate portion 322 is provided with a seventh mounting hole 322A; the relay assembly 100 also includes a third fastener, which passes through the sixth mounting hole 261 and the seventh mounting hole 322A.

[0158] In this way, the connection between the base 2 and the second electrical connector 32 is simple and convenient, which improves the connection efficiency. In addition, it is easy to disassemble, thus facilitating the assembly and disassembly of the relay body 1.

[0159] In some examples, the sixth mounting hole 261 can be a rivet bolt hole.

[0160] In some examples, the fifth plate 322 is also connected to the aluminum busbar extending from the battery pack body via laser welding.

[0161] In some examples, the fifth plate portion 322 is located at the end of the third surface 26 away from the plane where the opening 211 is located (i.e., the second surface 23). This allows the fifth plate portion 322 to be closer to the lead-out aluminum busbar of the battery pack body, facilitating the connection between the fifth plate portion 322 and the lead-out aluminum busbar of the battery pack body.

[0162] In some embodiments, the protective portion 25 further includes a fourth surface 251, which is connected between the third surface 26 and the base 24 and is adjacent to the surface where the opening 211 is located; a sixth plate portion 323 is provided on the side facing the fourth surface 251.

[0163] This increases the length of the second electrical connector 32, further enhancing heat dissipation and conductivity.

[0164] In some embodiments, the electrical connector 3 further includes a third electrical connector 33 and a fourth electrical connector 34. The third electrical connector 33 is connected between the relay body 1 and the base 2, and at least a portion of the third electrical connector 33 is located on the side of the opening 211 facing away from the first inner wall surface 212. The fourth electrical connector 34 surrounds the base 2 and is electrically connected to the third electrical connector 33. The fourth electrical connector 34 is adapted to be electrically connected to the battery pack body.

[0165] The first electrical connector 31 and the second electrical connector 32 form a first assembly, and the third electrical connector 33 and the fourth electrical connector 34 form a second assembly. One of the first assembly and the second assembly is connected to the positive terminal of the relay body 1, and the other of the first assembly and the second assembly is connected to the negative terminal of the relay body 1.

[0166] In some embodiments, the second electrical connector 32 includes an aluminum busbar portion 32A and a copper busbar portion 32B, the copper busbar portion 32B being electrically connected to the first electrical connector 31. The aluminum busbar portion 32A and the copper busbar portion 32B are electrically connected and adapted to be electrically connected to the battery pack body.

[0167] Both aluminum and copper have good electrical conductivity, and aluminum is cheaper than copper. Therefore, the second electrical connector 32 includes an aluminum busbar adapter 32A and a copper busbar adapter 32B, which can ensure the electrical conductivity of the second electrical connector 32, the first electrical connector 31, and the battery pack body, while also reducing costs.

[0168] In some embodiments, please refer to Figures 2 to 10 , Figure 10 for Figure 2 The diagram shows a structural schematic of the protective cover 6 in the relay assembly 100. The relay assembly 100 also includes the protective cover 6, which is connected to the base 24 and defines a protective space between itself and the base 24. The protective part 25 and the electrical connector 3 are disposed within the protective space.

[0169] In this way, by placing the protective part 25 and the electrical connector 3 within the protective space, damage to the protective part 25 and the electrical connector 3 is prevented.

[0170] In some embodiments, please refer to Figures 2 to 11 , Figure 11 for Figure 2 The diagram shows another structural schematic of the protective cover 6 in the relay assembly 100. The base 2 also includes a third surface 26, which is the surface of the protective part 25 facing away from the base bottom 24; the second electrical connector 32 includes a fifth plate part 322, which is connected to the third surface 26 and is adapted to be electrically connected to the battery pack body; the protective cover 6 includes a cover body 61 and a folding part 62, which defines a protective space with the base bottom 24; the cover body 61 has a notch located on the side of the fifth plate part 322 facing away from the third surface 26, and the folding part 62 is provided at the notch and folds along the direction of the fifth plate part 322 facing away from the third surface 26.

[0171] In this way, a larger space can be reserved for the connection between the fifth plate 322 and the battery pack body, which facilitates the installation of the second electrical connector 32 and the battery pack body. Furthermore, the folding part 62 can also protect the fifth plate 322 and prevent it from being damaged.

[0172] In some embodiments, one of the protective cover 6 and the base 2 is provided with a snap-fit ​​hole 63, and the other of the protective cover 6 and the base 2 is provided with a snap-fit ​​protrusion 64, which snaps into the snap-fit ​​hole 63. That is, the protective cover 6 may be provided with a snap-fit ​​hole 63 and the base 2 may be provided with a snap-fit ​​protrusion 64, or the base 2 may be provided with a snap-fit ​​hole 63 and the protective cover 6 may be provided with a snap-fit ​​protrusion 64.

[0173] This makes it easier to connect the protective cover 6 and the base 2.

[0174] In some examples, the axial direction of the snap-fit ​​hole 63 is perpendicular to the fourth surface 251.

[0175] In other examples, the axial direction of the snap-fit ​​hole 63 may also be parallel to the fourth surface 251.

[0176] In some examples, the number of snap-fit ​​holes 63 and snap-fit ​​protrusions 64 can be one, or the number of snap-fit ​​holes 63 and snap-fit ​​protrusions 64 can be multiple, such as two, three, four, etc. This application does not make a specific limitation in this regard.

[0177] In some examples, multiple snap-fit ​​holes 63 and snap-fit ​​bosses 64 may be arranged along a first direction. In the description of the embodiments of this application, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0178] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A relay assembly, characterized in that, For a battery pack assembly, the battery pack assembly including a battery pack body, the relay assembly including: Relay body (1); Base (2), the base (2) being adapted to connect the battery pack body, the relay body (1) being connected to the base (2); Electrical connector (3) is connected between the relay body (1) and the base (2) and is adapted to be electrically connected to the battery pack body.

2. The relay assembly according to claim 1, characterized in that, The electrical connector (3) surrounds the base (2).

3. The relay assembly according to claim 1, characterized in that, The base (2) is provided with a receiving cavity (21) having an opening (211), and at least a portion of the relay body (1) is disposed within the receiving cavity (21).

4. The relay assembly according to claim 3, characterized in that, The accommodating cavity (21) also includes a first inner wall surface (212) opposite to the opening (211); At least a portion of the electrical connector (3) is located on the side of the opening (211) opposite to the first inner wall surface (212).

5. The relay assembly according to claim 4, characterized in that, The base (2) is provided with a first connection hole (22), which extends from the first inner wall surface (212) in a direction opposite to the opening (211) and is adapted to connect the battery pack body.

6. The relay assembly according to claim 5, characterized in that, It also includes a first bushing (4), which is disposed in the first connecting hole (22) and extends circumferentially along the first connecting hole (22).

7. The relay assembly according to any one of claims 3-6, characterized in that, The relay body (1) passes through the opening (211) so that a portion of the relay body (1) is located outside the accommodating cavity (21).

8. The relay assembly according to claim 7, characterized in that, The portion of the relay body (1) located outside the accommodating cavity (21) includes a first surface (11) facing away from the opening (211); A portion of the electrical connector (3) is located on the side of the first surface (11) opposite to the opening (211) and is connected to the first surface (11).

9. The relay assembly according to claim 8, characterized in that, The electrical connector (3) includes: A first electrical connector (31) is connected between the relay body (1) and the base (2), and at least a portion of the first electrical connector (31) is located on the side of the opening (211) facing away from the first inner wall surface (212). A second electrical connector (32) surrounds the base (2) and is electrically connected to the first electrical connector (31), and is adapted to be electrically connected to the battery pack body.

10. The relay assembly according to claim 9, characterized in that, The base (2) includes a second surface (23), and the opening (211) is provided on the second surface (23); The first electrical connector (31) is connected between the second surface (23) and the first surface (11).

11. The relay assembly according to claim 10, characterized in that, The first electrical connector (31) includes: A first plate portion (311) is connected to the first surface (11); The second plate portion (312) is connected to the second surface (23); A third plate portion (313) is connected between the first plate portion (311) and the second plate portion (312).

12. The relay assembly according to claim 11, characterized in that, The third plate (313) is a flexible structure.

13. The relay assembly according to claim 11, characterized in that, The first surface (11) is provided with a first mounting hole (111), and the first plate portion (311) is provided with a second mounting hole (311A); The relay assembly also includes a first fastener that passes through the first mounting hole (111) and the second mounting hole (311A).

14. The relay assembly according to claim 13, characterized in that, It also includes a second bushing disposed in the second mounting hole (311A) and / or the first mounting hole (111), and extending circumferentially along the second mounting hole (311A).

15. The relay assembly according to claim 11, characterized in that, The second surface (23) is provided with a third mounting hole (231), and the second plate portion (312) is provided with a fourth mounting hole (312A); The relay assembly also includes a second fastener that passes through the third mounting hole (231) and the fourth mounting hole (312A).

16. The relay assembly according to claim 15, characterized in that, It also includes a third bushing, which is disposed in the fourth mounting hole (312A) and / or the third mounting hole (231) and extends circumferentially along the fourth mounting hole (312A).

17. The relay assembly according to any one of claims 9-16, characterized in that, The first electrical connector (31) is the first copper busbar.

18. The relay assembly according to any one of claims 9-16, characterized in that, The base (2) includes a base (24) and a protective part (25) disposed on the base (24). The base (24) is adapted to be connected to the battery pack body. The protective part (25) is provided with the receiving cavity (21). The opening (211) of the receiving cavity (21) is perpendicular to the arrangement direction of the base (24) and the protective part (25).

19. The relay assembly according to claim 18, characterized in that, The base (24) is provided with a second connection hole (241), which is suitable for connecting the battery pack body.

20. The relay assembly according to claim 19, characterized in that, It also includes a fourth bushing (5), which is disposed in the second connecting hole (241) and extends circumferentially along the second connecting hole (241).

21. The relay assembly according to claim 20, characterized in that, A portion of the fourth bushing (5) is located on the side of the base (24) facing the protective part (25).

22. The relay assembly according to claim 19, characterized in that, The base (24) is also provided with a third connecting hole (242), the third connecting hole (242) and the second connecting hole (241) are arranged along a first direction, the first direction being perpendicular to the plane where the opening (211) is located; At least one of the second connecting hole (241) and the third connecting hole (242) extends in a strip shape along the first direction.

23. The relay assembly according to claim 18, characterized in that, The base (2) further includes a third surface (26), which is the surface of the protective part (25) facing away from the base bottom (24); the second electrical connector (32) is connected between the first electrical connector (31) and the third surface (26).

24. The relay assembly according to claim 23, characterized in that, The second electrical connector (32) includes: The fourth plate (321) is connected to the first electrical connector (31); The fifth plate (322) is connected to the third surface (26) and is adapted to be electrically connected to the battery pack body; The sixth plate (323) is connected between the fourth plate (321) and the fifth plate (322).

25. The relay assembly according to claim 24, characterized in that, The base (2) includes a second surface (23), and the opening (211) is provided on the second surface (23); the first electrical connector (31) includes a second plate portion (312), and the second plate portion (312) is connected to the second surface (23); The fourth plate (321) is connected to the second surface (23) and to the second plate (312).

26. The relay assembly according to claim 24, characterized in that, The second surface (23) is provided with a third mounting hole (231), the second plate portion (312) is provided with a fourth mounting hole (312A), and the fourth plate portion (321) is provided with a fifth mounting hole (321A); The relay assembly also includes a second fastener that passes through the third mounting hole (231), the fourth mounting hole (312A), and the fifth mounting hole (321A).

27. The relay assembly according to claim 24, characterized in that, The third surface (26) is provided with a sixth mounting hole (261), and the fifth plate portion (322) is provided with a seventh mounting hole (322A); The relay assembly also includes a third fastener that passes through the sixth mounting hole (261) and the seventh mounting hole (322A).

28. The relay assembly according to claim 24, characterized in that, The protective part (25) further includes a fourth surface (251), which is connected between the third surface (26) and the base (24) and is adjacent to the surface where the opening (211) is located; The sixth plate (323) is located on the side facing the fourth surface (251).

29. The relay assembly according to any one of claims 9-16, characterized in that, The electrical connector (3) also includes: A third electrical connector (33) is connected between the relay body (1) and the base (2), and at least a portion of the third electrical connector (33) is located on the side of the opening (211) facing away from the first inner wall surface (212). A fourth electrical connector (34) surrounds the base (2) and is electrically connected to the third electrical connector (33), and the fourth electrical connector (34) is adapted to be electrically connected to the battery pack body; The first electrical connector (31) and the second electrical connector (32) form a first component, and the third electrical connector (33) and the fourth electrical connector (34) form a second component. One of the first component and the second component is connected to the positive terminal of the relay body (1), and the other of the first component and the second component is connected to the negative terminal of the relay body (1).

30. The relay assembly according to any one of claims 9-16, characterized in that, The second electrical connector (32) includes an aluminum busbar section (32A) and a copper busbar section (32B). The copper busbar section (32B) is electrically connected to the first electrical connector (31). The aluminum busbar section (32A) is electrically connected to the copper busbar section (32B) and is adapted to be electrically connected to the battery pack body.

31. The relay assembly according to claim 18, characterized in that, It also includes a protective cover (6), which is connected to the base (24) and defines a protective space between itself and the base (24), wherein the protective part (25) and the electrical connector (3) are disposed within the protective space.

32. The relay assembly according to claim 31, characterized in that, The base (2) further includes a third surface (26), which is the surface of the protective part (25) facing away from the base bottom (24); the second electrical connector (32) includes a fifth plate (322), which is connected to the third surface (26) and is adapted to be electrically connected to the battery pack body; The protective cover (6) includes a cover body (61) and a folding portion (62), wherein the cover body (61) and the base (24) define the protective space; The cover body (61) has a notch located on the side of the fifth plate (322) opposite to the third surface (26). The folding part (62) is located at the notch and folds in the direction of the fifth plate (322) opposite to the third surface (26).

33. The relay assembly according to claim 32, characterized in that, One of the protective cover (6) and the base (2) is provided with a snap-fit ​​hole (63), and the other of the protective cover (6) and the base (2) is provided with a snap-fit ​​boss (64), which snaps into the snap-fit ​​hole (63).

34. A battery pack assembly, characterized in that, The relay assembly includes any one of claims 1-33.

35. The battery pack assembly according to claim 34, characterized in that, It also includes a battery pack body, to which the relay assembly is connected.

36. An electrical appliance, characterized in that, It includes the relay assembly according to any one of claims 1-33, or the battery pack assembly according to any one of claims 34-35.

Images