Contact structure, battery power distribution unit, battery pack and power utilization device

Abstract

The utility model discloses a contact structure, a battery power distribution unit, a battery pack and an electric device, and relates to the field of relays. The contact structure comprises a composite cover, a contact column and an insulating supporting piece. The composite cover comprises a first conducting strip and a second conducting strip, a matching hole is formed in the first conducting strip, at least part of the second conducting strip is located in the matching hole, and the first conducting strip is used for being welded to the busbar; two opposite surfaces of the contact column are a connecting surface and a static contact surface, the connecting surface is in welded connection with the second conductive sheet, and the static contact surface is used for being in contact conduction with a contact of an electrical apparatus element; a through supporting hole is formed in the supporting piece, one end, provided with the static contact face, of the contact column is located in the supporting hole, and the contact column is connected with the supporting piece. The contact structure provided by the embodiment of the utility model has the advantages of excellent connection effect and high reliability.

Description

Contact structure, battery distribution unit, battery pack and electrical device Technical Field

[0001] This utility model relates to the field of relays, specifically to a contact structure, a battery power distribution unit, a battery pack, and an electrical device. Background Technology

[0002] Currently, high-voltage relays used in distribution boxes connect to components such as fuses and charging resistors via copper busbars and bolts to achieve circuit state switching. However, this connection method carries risks such as loose screws and low residual torque, and is also costly. To reduce costs, some existing technologies have adopted aluminum busbars instead of traditional copper busbars. However, this introduces the problem of copper-aluminum welding.

[0003] Therefore, there is room for improvement in the contact structure of relays. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, the first aspect of the present invention aims to provide a contact structure that has excellent connection performance and high reliability.

[0005] The second aspect of this utility model aims to provide a battery power distribution unit having the above-mentioned contact structure.

[0006] The objective of the third aspect of this utility model is to provide a battery pack having the aforementioned battery power distribution unit.

[0007] The fourth aspect of this utility model aims to provide an electrical device having the aforementioned battery pack.

[0008] According to a first aspect of the present invention, a contact structure includes: a composite cover, a contact post, and an insulating support member. The composite cover includes a first conductive sheet and a second conductive sheet. The first conductive sheet has a mating hole, and at least a portion of the second conductive sheet is located within the mating hole. The first conductive sheet is used for welding to a busbar. The two opposite sides of the contact post are a connecting surface and a stationary contact surface. The connecting surface is welded to the second conductive sheet, and the stationary contact surface is used for contact and conduction with the contacts of an electrical component. The support member has a through support hole, and one end of the contact post with the stationary contact surface is located within the support hole. The contact post is connected to the support member.

[0009] According to the contact structure of this utility model embodiment, by setting the composite cover to include a first conductive sheet and a second conductive sheet, and opening a mating hole on the first conductive sheet so that the second conductive sheet is at least partially located within the mating hole, a stable connection structure is formed, improving the overall stability of the composite cover. This design not only enhances the structural strength of the composite cover but also improves the reliability of the electrical connection. The first conductive sheet is particularly beneficial for achieving a good welded connection with the busbar. Furthermore, a stable connection is established between the second conductive sheet and the contact post, ensuring efficient power transmission. Simultaneously, by providing a support hole in the support member to accommodate one end of the contact post, additional mechanical support is provided to the contact post, further improving its structural stability and durability.

[0010] According to some optional embodiments of the contact structure of the present invention, one of the second conductive sheet and the connecting surface is provided with a connecting protrusion, and the other is provided with a connecting hole, wherein the connecting protrusion is inserted into the connecting hole.

[0011] Furthermore, an internal thread is formed on the inner wall of the connecting hole, and a matching external thread is provided on the outer periphery of the connecting protrusion.

[0012] Further optionally, when the connecting hole is located on the second conductive sheet, the connecting hole is a through hole or a blind hole; when the connecting hole is located on the contact post, the connecting hole is a through hole or a blind hole.

[0013] In some alternative embodiments, the mating hole is a through hole or a blind hole, and the second conductive sheet is welded to the first conductive sheet.

[0014] According to some optional embodiments of the present invention, the contact post includes: a first column segment, the end face of the first column segment being the connecting surface; a second column segment, the second column segment being connected to the first column segment, the end face of the second column segment away from the first column segment being the stationary contact surface; and the outer periphery of the first column segment being an annular platform extending beyond the outer periphery of the second column segment, the annular platform being connected to the support member.

[0015] Specifically, the annular platform has a slot on the side facing the second column segment.

[0016] According to some optional embodiments of the present invention, the contact post is glued or welded to the support member.

[0017] According to some optional embodiments of the contact structure of this utility model, the first conductive sheet is an aluminum sheet, the second conductive sheet is a copper sheet, and the contact post is a copper post.

[0018] In some specific embodiments, the support member is a plastic or ceramic component.

[0019] A battery power distribution unit according to a second aspect of the present invention includes: a contact structure according to a first aspect of the present invention; and an electrical element, wherein the contacts of the electrical element are in contact with the stationary contact surface for conduction.

[0020] The battery pack according to a third aspect of the present invention includes a battery power distribution unit according to a second aspect of the present invention.

[0021] The electrical device according to a fourth aspect of the present invention includes a battery pack according to a third aspect of the present invention.

[0022] Additional aspects and advantages of this invention 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 the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 is a schematic diagram of the contact structure in some embodiments of this utility model;

[0025] Figure 2 is a cross-sectional view of the contact structure in some embodiments of this utility model;

[0026] Figure 3 is a perspective view of the contact structure in some embodiments of this utility model;

[0027] Figure 4 is a cross-sectional view of the composite cover in some embodiments of this utility model;

[0028] Figure 5 is a cross-sectional view of the contact post in some embodiments of this utility model;

[0029] Figure 6 is a schematic diagram of the contact structure in some embodiments of the present invention;

[0030] Figure 7 is a side view of the contact structure in some embodiments of the present invention;

[0031] Figure 8 is a cross-sectional view of the contact post in some embodiments of this utility model.

[0032] Figure label:

[0033] Contact structure 100

[0034] Composite cover 10, first conductive sheet 12, mating hole 121, second conductive sheet 14, mating hole 141

[0035] Contact post 30, first post segment 31, connecting surface 311, connecting protrusion 3111, annular platform 312, slot 3121, second post segment 33, stationary contact surface 331.

[0036] Support component 50, support hole 51. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown 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 utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] It should be noted that, in the description of this application, "and / or" means that there are three parallel options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0041] The contact structure according to a first aspect embodiment of the present invention is described below with reference to Figures 1-8. The contact structure of this application forms a complete circuit path by connecting to a busbar on one hand and contacting an electrical component on the other.

[0042] As shown in Figure 1, this contact structure 100 includes: a composite cover 10, a contact post 30, and an insulating support 50.

[0043] The composite cover 10 is suitable for connection with the manifold. The connection method can be welding, etc.

[0044] Specifically, as shown in Figures 2-4, the composite cover 10 includes a first conductive sheet 12 and a second conductive sheet 14. The first conductive sheet 12 has a mating hole 121, and a portion of the second conductive sheet 14 is embedded within the mating hole 121. This nested structure achieves a reliable and tight connection between the different conductive sheets, helping to reduce resistance and ensure efficient conductivity. Furthermore, this nested structure not only enhances the contact stability between the first conductive sheet 12 and the second conductive sheet 14 but also improves the mechanical strength of the composite cover 10 to a certain extent, enabling the contact structure 100 to maintain excellent electrical performance and reliability even under high vibration or high load environments. In addition, the nested structure of the first conductive sheet 12 and the second conductive sheet 14 is simple to design and easy to manufacture, resulting in a low-cost yet highly reliable contact structure.

[0045] In some optional embodiments, the cross-sectional shape of the mating hole 121 of the first conductive sheet 12 can be a rectangle, square, triangle, trapezoid, or other polygonal or irregular shapes. Correspondingly, a portion of the shape of the second conductive sheet 14 is adapted to the shape of the mating hole 121 of the first conductive sheet 12, allowing a portion of the second conductive sheet 14 to be perfectly embedded in the mating hole 121. By tightly contacting the second conductive sheet 14 of the aforementioned shape with the mating hole 121 of the first conductive sheet 12, not only can the surface area of ​​the mating hole 121 be fully utilized, but the contact between the two can also be ensured to be more stable and tight, thereby effectively reducing contact resistance, improving conductivity, and enhancing the mechanical stability of the overall structure.

[0046] Optionally, the first conductive sheet 12 is made of aluminum. By utilizing the connection structure between the first conductive sheet 12 and the second conductive sheet 14 in this application, a reliable and stable connection is ensured for the contact structure 100. Therefore, using an aluminum sheet as the first conductive sheet 12 not only ensures the stability and efficiency of the electrical connection but also helps to reduce costs.

[0047] To facilitate the connection between the first conductive sheet 12 and the busbar, in some embodiments shown in Figures 6 and 7, the cross-section of the first conductive sheet 12 is L-shaped.

[0048] The contact post 30 in the contact structure 100 is adapted to be connected to an electrical component.

[0049] Specifically, referring to Figures 2 and 5, the two opposite sides of the contact post 30 are the connecting surface 311 and the stationary contact surface 331. The connecting surface 311 is welded to the second conductive sheet 14, and the stationary contact surface 331 is used to make contact with the electrical components to conduct electricity.

[0050] Optionally, the connecting surface 311 and the second conductive piece 14 in the composite cover 10 are welded together. Welding helps ensure a robust electrical connection and reduces resistance, improving conductivity and enhancing the overall stability and reliability of the contact structure 100. This arrangement not only improves conductivity but also enhances the stability of the overall structure. Furthermore, this configuration simplifies the installation process while ensuring long-term reliability.

[0051] Specifically, the welding method between the connecting surface 311 of the contact post 30 and the second conductive sheet 14 can be brazing, diffusion welding or other welding methods, without any specific restrictions.

[0052] Alternatively, the shape of the stationary contact surface 331 of the contact post 30 is very flexible and can be circular, rectangular or other easily processed shapes.

[0053] To further improve the structural stability of the contact post 30, the contact structure 100 of this application also includes a support member 50. The support member 50 is an insulating component. On the one hand, the insulating support member 50 can effectively prevent current leakage and ensure electrical safety; on the other hand, the insulating support member 50 can avoid unnecessary short-circuit risks, ensure the normal operation of the contact structure 100, and improve the reliability of the contact structure 100.

[0054] Specifically, referring to Figures 1 and 2, the support member 50 is provided with a through support hole 51. One end of the contact post 30, which has a stationary contact surface 331, is located inside the support hole 51, and the contact post 30 is connected to the support member 50. The support hole 51 provides additional mechanical support to the contact post 30, ensuring that the contact post 30 remains in a stable position during use, reducing or even avoiding positional displacement of the contact post 30 caused by external vibration or mechanical impact, and further improving the overall stability of the contact structure 100.

[0055] Optionally, the support 50 may be made of insulating materials such as high-strength plastic or ceramic components. These materials have high mechanical strength and dimensional stability, enabling them to maintain their shape and performance over long-term use, thereby improving the stability of the contact post 30 and enhancing the reliability of the contact structure 100.

[0056] Furthermore, the support member 50 is made of ceramic. Utilizing the low coefficient of thermal expansion and high stability of ceramic, structural stresses caused by temperature changes are reduced, ensuring the stable position of the support member 50 and the contact post 30 it is fixed to. This design avoids positional shifts due to temperature fluctuations, further enhancing the stability and reliability of the contact structure 100 under various operating environments. In addition, the excellent insulation properties of ceramic help prevent current leakage and improve electrical safety.

[0057] Alternatively, the connection between the contact post 30 and the support member 50 may be achieved by interference fit, welding, bonding or other fixing methods to further ensure the stability of the connection between the two.

[0058] In summary, the contact structure 100 of this utility model embodiment has excellent connection effect and high reliability, and also promotes stable connection between the busbar and electrical components.

[0059] According to some optional embodiments of the present invention, one of the second conductive sheet 14 and the connecting surface 311 is provided with a connecting protrusion 3111, and the other is provided with a connecting hole 141, with the connecting protrusion 3111 inserted into the connecting hole 141.

[0060] Specifically, the connecting post 3111 can be precisely embedded into the corresponding connecting hole 141, which not only enhances the strength of the physical connection but also effectively reduces contact resistance and energy loss. The mating structure of the connecting post 3111 and the connecting hole 141 ensures the stability of the connection between the composite cover 10 and the contact post 30. Furthermore, this mating structure helps prevent loosening and poor contact, ensuring the stable use of the contact structure 100 even under some vibration conditions. Especially when the contact structure is applied to vehicles, it can effectively cope with vibrations and impacts generated during driving, ensuring the continuous and reliable operation of the electrical system.

[0061] Referring to Figures 1-2 and 4-5, in some specific embodiments, the second conductive sheet 14 is provided with a connecting hole 141, and the connecting surface 311 is provided with a connecting protrusion 3111.

[0062] Optionally, in this application, the cross-sectional shape of the connecting protrusion 3111 can be flexibly selected. For example, the cross-sectional shape of the connecting protrusion 3111 can be constructed as a circle, or as a triangle, or as a trapezoid, rectangle, semicircle, or other regular or irregular shape. Correspondingly, the cross-sectional shape of the connecting hole 141 is the same as that of the connecting protrusion 3111. By placing the connecting protrusion 3111 of the above shape into contact with the corresponding connecting hole 141, the tightness of the connection between the two can be increased.

[0063] Optionally, at least one of the engagement protrusion 3111 and the engagement hole 141 has chamfered edges. This makes the engagement protrusion 3111 easier to insert into the engagement hole 141, reduces assembly resistance caused by sharp edges, and helps to improve assembly efficiency.

[0064] In some optional embodiments, the second conductive piece 14 is welded to the contact post 30. In this case, the combination of the protrusion 3111 and the mating hole 141 increases the welding area, making the weld joint more robust and reducing the risk of connection failure due to vibration or impact, thereby improving welding strength. This arrangement not only enhances the reliability of the electrical connection but also improves mechanical stability, ensuring safety and durability for long-term use.

[0065] Further optionally, the sidewall of at least one of the connecting hole 141 and the connecting protrusion 3111 is flat, or it is corrugated, threaded, or other forms. Specifically, complex surface structures such as corrugated or threaded surfaces can provide more welding material adhesion points, increase the welding area, and enhance the strength and mechanical stability of the weld.

[0066] In some specific embodiments, an internal thread is formed on the inner wall of the mating hole 141, and a mating external thread is provided on the outer periphery of the mating protrusion. The mating protrusion and the mating hole 141 are connected by a threaded structure, which enhances the mechanical connection strength and stability between the two, ensures tight contact, reduces the risk of loosening, and improves the overall structural stability. At the same time, the connection is simple and easy to assemble.

[0067] In some alternative embodiments, when the bonding hole 141 is located on the second conductive sheet 14, the bonding hole 141 is a through hole or a blind hole.

[0068] In some technical solutions, as shown in Figure 1, the connecting hole 141 is a through hole. The through hole allows the connecting protrusion 3111 to completely pass through the second conductive sheet 14 from one side. Using a through hole facilitates observation and quick alignment by operators during installation, simplifying the assembly process and reducing operational difficulty during manufacturing. By allowing the connecting protrusion 3111 to completely penetrate the second conductive sheet 14, workers can more intuitively inspect the connection status, ensuring that each component is accurately installed, thereby improving the assembly efficiency and reliability of the contact structure 100.

[0069] In some other technical solutions, the connecting hole 141 is a blind hole. Specifically, by setting the contact post 30 or the second conductive sheet 14 as a blind hole, the integrity of the corresponding components can be preserved, thereby improving the mechanical strength and durability of the components and ensuring their stability and reliability during long-term use. In addition, the construction of the blind hole also helps to simplify the sealing requirements, reduce the risk of external contaminants entering the connection area, and further enhance the reliability and service life of the contact structure 100.

[0070] According to some optional embodiments of the present invention, the mating hole 121 is a through hole or a blind hole, and the second conductive sheet 14 is welded to the first conductive sheet 12.

[0071] In some alternative technical solutions, the mating hole 121 is a through hole. The through hole allows the second conductive sheet 14 to pass completely through the first conductive sheet 12 from one side. The through hole design facilitates direct observation and quick alignment by the operator during installation, simplifying the assembly process, reducing operational difficulty in the manufacturing process, and thus improving the assembly efficiency and reliability of the composite cover 10.

[0072] Optionally, the second conductive sheet 14 is welded to the inner wall of the through hole through its outer peripheral wall to ensure the reliability of the connection between the first conductive sheet 12 and the second conductive sheet 14.

[0073] In some alternative technical solutions, the mating hole 121 is a blind hole. By setting the mating hole 121 in the first conductive sheet 12 as a blind hole, the integrity of the first conductive sheet 12 is preserved, thereby improving the mechanical strength and durability of the first conductive sheet 12 and ensuring the stability and reliability of the first conductive sheet 12 in long-term use. In addition, the blind hole construction also helps to simplify the sealing requirements, reduce the risk of external contaminants entering the connection area, and further enhance the reliability and service life of the contact structure 100.

[0074] According to some optional embodiments of the present invention, and referring to Figures 2 and 5-7, the contact post 30 includes: a first post segment 31 and a second post segment 33. The end face of the first post segment 31 is a connecting surface 311. The second post segment 33 is connected to the first post segment 31, and the end face of the second post segment 33 away from the first post segment 31 is a stationary contact surface 331. The outer periphery of the first post segment 31 is an annular platform 312 extending beyond the outer periphery of the second post segment 33, and the annular platform 312 is connected to the support member 50.

[0075] In the above technical solution, the structure of the annular platform 312 allows the contact post 30 to be directly connected to the support member 50 through its outer periphery, increasing the contact area and thus providing additional mechanical support.

[0076] By setting the annular platform 312, the contact post 30 can evenly distribute stress across the entire annular contact surface when subjected to external forces (such as vibration or impact), avoiding stress concentration at a single point and reducing the risk of localized deformation or damage. This uniform stress distribution ensures that the contact post 30 maintains stable performance during long-term use.

[0077] The through hole on the support 50 can fit tightly with the annular platform 312, further enhancing the stability of the contact post 30 and preventing it from loosening or shifting during use.

[0078] Alternatively, as shown in Figures 2-3, 5, and 8, the annular platform 312 has a slot 3121 on the side facing the second column segment 33. This arrangement provides a buffer space during welding, preventing stress concentration at the connection between the annular platform 312 and the first column segment 31. Furthermore, the slot 3121 can absorb thermal and mechanical stresses generated during welding, reducing the risk of deformation and cracking, thereby improving the stability and reliability of the overall structure.

[0079] According to some optional embodiments of the present invention, the contact post 30 is glued or welded to the support member 50.

[0080] In some technical solutions, the contact post 30 is bonded to the support member 50 by adhesive. The adhesive layer has a certain degree of elasticity, which can absorb vibration and impact to a certain extent and avoid stress concentration. At the same time, the adhesive can fill tiny gaps, providing a good sealing effect and preventing external contaminants such as dust and moisture from entering. In addition, the adhesive bonding method is simple and reduces manufacturing costs.

[0081] In some alternative technical solutions, the contact post 30 is welded to the support member 50. Welding ensures a stable connection between the contact post 30 and the support member 50. At the same time, the welded area typically has high corrosion resistance and fatigue resistance, which helps to improve the reliability of the contact structure 100.

[0082] According to some optional embodiments of the present invention, the first conductive sheet 12 is an aluminum sheet, the second conductive sheet 14 is a copper sheet, and the contact post 30 is a copper post.

[0083] The first conductive sheet 12 (aluminum sheet) is connected to the busbar by welding to ensure the continuity and stability of the electrical path.

[0084] Both the second conductive sheet 14 and the contact post 30 are made of copper, which helps to improve the conductivity between them. In addition, the use of copper posts facilitates brazing with the ceramic support 50, thereby further enhancing the stability and reliability of the overall structure.

[0085] Optionally, the first conductive sheet 12 and the second conductive sheet 14 are connected by welding. The welding method can be friction welding, explosive welding, etc. These methods ensure a high-strength bond between the copper and aluminum sheets. Friction welding uses high-speed rotation and pressure to generate heat at the contact surface and achieve fusion, while explosive welding utilizes the impact force generated by an explosion to tightly bond the two metals. These two welding techniques not only provide a certain level of mechanical strength and electrical conductivity but also effectively reduce contact resistance, ensuring the reliability and stability of the electrical connection.

[0086] Optionally, the second conductive sheet 14 and the contact post 30 are connected by welding methods such as brazing or diffusion welding. Brazing uses a filler metal with a melting point lower than that of the base material to achieve the connection, while diffusion welding uses high temperature and high pressure to cause the atoms on the contact surface to diffuse into each other, forming a strong bond. These two welding methods ensure high conductivity and mechanical strength between the copper sheet and the copper post, reduce contact resistance, and improve the reliability and electrical performance of the contact structure 100.

[0087] According to some optional embodiments of the present invention, the support member 50 is a plastic part or a ceramic part.

[0088] When the support member 50 is made of plastic, it offers excellent insulation and lightweight advantages. When the support member 50 is made of ceramic, it provides higher heat resistance and mechanical strength. Both materials effectively isolate electrical paths, prevent short circuits, and provide stable support for the contact post 30.

[0089] A battery power distribution unit according to a second aspect embodiment of the present invention includes: a contact structure 100 and an electrical component, wherein the contacts of the electrical component are in contact with a stationary contact surface 331 for electrical conduction. The contact structure 100 is the same as the contact structure 100 of the first aspect embodiment of the present invention.

[0090] It is worth noting that the battery power distribution unit can be used in vehicles to manage the distribution of current from the battery pack to various electrical devices, such as drive motors and air conditioning systems. It also integrates relays and fuses to provide overload and short circuit protection. The relays and fuses have a contact structure 100.

[0091] By adopting the improved contact structure 100, the reliability of the battery power distribution unit is improved, while ensuring long-term stability.

[0092] The battery pack according to a third aspect of the present invention includes a battery power distribution unit according to a second aspect of the present invention.

[0093] By adopting an improved battery power distribution unit, the reliability and stability of the battery pack can be enhanced, ensuring efficient and stable current distribution.

[0094] The electrical device according to a fourth aspect embodiment of the present invention includes a battery pack according to a third aspect embodiment of the present invention. By employing the improved battery pack, the reliability of the electrical device in use is improved.

[0095] The contact structure 100 according to an embodiment of the present invention will now be described in detail with reference to Figures 1-5, using a specific example. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0096] Referring to Figure 1, the contact structure 100 includes: a composite cover 10, a contact post 30, and a support member 50.

[0097] Referring to Figures 2-4, the composite cover 10 includes a first conductive sheet 12 and a second conductive sheet 14. The first conductive sheet 12 has a mating hole 121, which is a blind hole. At least a portion of the second conductive sheet 14 is located within the mating hole 121. The first conductive sheet 12 is used for welding to a busbar.

[0098] Referring to Figure 5, the second conductive sheet 14 is provided with a connecting hole 141. The connecting hole 141 is a through hole.

[0099] Referring to Figures 3 and 5, the contact post 30 includes: a first post segment 31 and a second post segment 33.

[0100] The end face of the first column segment 31 is a connecting surface 311. A connecting protrusion 3111 is provided on the connecting surface 311. The connecting protrusion 3111 is inserted into the connecting hole 141 on the second conductive sheet 14. The outer periphery of the first column segment 31 is an annular platform 312 extending beyond the outer periphery of the second column segment 33. The annular platform 312 is connected to the support member 50. The annular platform 312 has a slot 3121 on the side facing the second column segment 33.

[0101] The second column segment 33 is connected to the first column segment 31, and the end face of the second column segment 33 away from the first column segment 31 is a stationary contact surface 331. The stationary contact surface 331 is used to make contact with the contacts of electrical components to conduct electricity.

[0102] The support member 50 is a ceramic part, and the support member 50 has a through support hole 51. One end of the contact post 30 with a stationary contact surface 331 is located in the support hole 51, and the contact post 30 is connected to the support member 50.

[0103] The first conductive sheet 12 is an aluminum sheet, the second conductive sheet 14 is a copper sheet, and the contact post 30 is a copper post.

[0104] Other components of the contact structure 100 according to the embodiments of the present invention, such as battery distribution unit, battery pack and power supply device, as well as their operation, are known to those skilled in the art and will not be described in detail here.

[0105] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. 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.

[0106] Although embodiments of the present invention 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 the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A contact structure, characterized in that, include: A composite cover includes a first conductive sheet and a second conductive sheet. The first conductive sheet has a mating hole, and at least a portion of the second conductive sheet is located within the mating hole. The first conductive sheet is used for welding to a busbar. A contact post has a connecting surface and a stationary contact surface on opposite sides. The connecting surface is welded to the second conductive sheet, and the stationary contact surface is used for contact and conduction with the contacts of an electrical component. An insulating support member has a through support hole, and one end of the contact post with the stationary contact surface is located within the support hole. The contact post is connected to the support member.

2. The contact structure according to claim 1, characterized in that, The second conductive sheet and one of the connecting surfaces are provided with a connecting protrusion, and the other is provided with a connecting hole, and the connecting protrusion is inserted into the connecting hole.

3. The contact structure according to claim 2, characterized in that, An internal thread is formed on the inner wall of the connecting hole, and a matching external thread is provided on the outer periphery of the connecting protrusion.

4. The contact structure according to claim 2, characterized in that, When the connecting hole is located on the second conductive sheet, the connecting hole is a through hole or a blind hole; when the connecting hole is located on the contact post, the connecting hole is a through hole or a blind hole.

5. The contact structure according to claim 1, characterized in that, The mating hole is either a through hole or a blind hole, and the second conductive sheet is welded to the first conductive sheet.

6. The contact structure according to any one of claims 1-5, characterized in that, The contact post includes: a first column segment, the end face of which is the connecting surface; a second column segment, which is connected to the first column segment, the end face of the second column segment away from the first column segment being the stationary contact surface; and an outer peripheral portion of the first column segment being an annular platform extending beyond the outer periphery of the second column segment, the annular platform being connected to the support member.

7. The contact structure according to claim 6, characterized in that, The annular platform has a slot on the side facing the second column segment.

8. The contact structure according to any one of claims 1-5, characterized in that, The contact posts are glued or welded to the support.

9. The contact structure according to any one of claims 1-5, characterized in that, The first conductive sheet is an aluminum sheet, the second conductive sheet is a copper sheet, and the contact post is a copper post.

10. The contact structure according to any one of claims 1-5, characterized in that, The support component is made of plastic or ceramic.

11. A battery power distribution unit, characterized in that, include: The contact structure according to any one of claims 1-10; an electrical component, wherein the contacts of the electrical component are in contact with the stationary contact surface for conduction.

12. A battery pack, characterized in that, Includes the battery power distribution unit according to claim 11.

13. An electrical appliance, characterized in that, Includes the battery pack according to claim 12.

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