Bus connection structure, battery power distribution unit, battery pack and electric device

Abstract

The utility model discloses a kind of bus connection structure, battery distribution unit, battery pack and electric device, it is related to electrical equipment technical field.Bus connection structure includes: electric appliance component electric connector, busbar and heat sink, electric connector is equipped with first combination part;Busbar is equipped with second combination part, and second combination part is connected with first combination part;Heat sink is arranged on busbar.The bus connection structure of the utility model embodiment is integrated heat sink, reduce the operating temperature of structure, ensure its reliability and stability in use process.

Description

Technical Field

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

[0002] In some existing technologies, relay contacts are made of pure copper or copper alloy, while busbars are made of aluminum. Due to the difference in the coefficients of thermal expansion between copper and aluminum, the joint between the two can loosen over long-term use, resulting in increased contact resistance, poor contact, and other adverse effects.

[0003] Therefore, there is room for improvement in the connection structure between the relay and the bus. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the first aspect of the present invention aims to provide a busbar connection structure that, by integrating heat dissipation components, reduces the operating temperature of the structure and ensures its reliability and stability during use.

[0005] The second aspect of this utility model is to provide a battery power distribution unit having the above-mentioned busbar connection 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 embodiment of the present invention, a busbar connection structure includes: an electrical connector for an electrical component, a busbar, and a heat sink; the electrical connector has a first connecting portion; the busbar has a second connecting portion connected to the first connecting portion; and the heat sink is disposed on the busbar.

[0009] According to the bus connection structure of this utility model embodiment, by setting heat dissipation components on the busbar, the heat dissipation efficiency of the entire structure is effectively improved, the operating temperature is reduced, and the loosening that may occur between different materials due to different expansion coefficients is reduced, thereby ensuring the stability and durability of the joint between the electrical connector and the busbar.

[0010] According to some optional embodiments of the present invention, the heat dissipation component includes: a heat dissipation shell, wherein a receiving cavity is provided inside the heat dissipation shell; and a heat conductor, wherein the heat conductor is located inside the receiving cavity.

[0011] Optionally, the heat sink further includes: a heat sink pipe having an encapsulated cavity; and a heat dissipation liquid filling the cavity.

[0012] Further optionally, the volume of the heat dissipation liquid accounts for less than 1% of the volume of the cavity.

[0013] In some alternative embodiments, the heat conductor includes at least a portion of thermally conductive silicone grease, thermally conductive silicone rubber, phase change material, and metal heat dissipation adhesive.

[0014] According to some optional embodiments of the present invention, one of the first joint portion and the second joint portion is a first protrusion and the other is a first groove, the first protrusion is inserted into the first groove, and the first protrusion is welded to the first groove.

[0015] Optionally, the heat sink and the electrical connector are located on opposite sides of the busbar.

[0016] Further optionally, the first joint portion is a first groove, and the second joint portion is a first protrusion; a second groove is formed on the side opposite to the first protrusion on the busbar, and the second groove extends into the first protrusion; the heat sink is provided with a second protrusion, and the second protrusion is inserted into the second groove.

[0017] Specifically, the second protrusion is interference-fitted into the second groove, and the second protrusion is welded to the second groove.

[0018] In some alternative embodiments, an intermediate layer is further included, which is located within the first groove and connected to the first protrusion; the chemical potential of the intermediate layer is located between the chemical potential of the electrical connector and the chemical potential of the busbar.

[0019] Specifically, the intermediate layer is an annular ring inserted into the first groove; or the intermediate layer is a plating layer.

[0020] Alternatively, the intermediate layer may be a plasma chemical vapor deposition layer; or, the intermediate layer may be a vacuum magnetron sputtering layer.

[0021] In some alternative embodiments, an internal thread is formed in the first groove, and a mating external thread is provided on the first protrusion.

[0022] The battery power distribution unit according to a second aspect of the present invention includes the bus connection structure described in the first aspect of the present invention, wherein the electrical components include at least one of a relay and a fuse.

[0023] The battery pack according to a third aspect of the present invention includes the battery power distribution unit according to a second aspect of the present invention.

[0024] The electrical device according to a fourth aspect of the present invention includes the battery pack according to a third aspect of the present invention.

[0025] 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

[0026] 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:

[0027] Figure 1 This is a simplified exploded view of the bus connection structure in some embodiments of this utility model;

[0028] Figure 2 This is a cross-sectional view of the bus connection structure in some embodiments of the present invention;

[0029] Figure 3 This is an exploded view of the bus connection structure in some embodiments of the present invention;

[0030] Figure 4 This is a schematic diagram of the heat sink structure in some embodiments of the present invention;

[0031] Figure 5 This is a schematic diagram of the heat dissipation pipe structure in some embodiments of this utility model;

[0032] Figure 6 This is another cross-sectional view of the bus connection structure in some embodiments of this utility model;

[0033] Figure 7 This is another exploded view of the bus connection structure in some embodiments of this utility model.

[0034] Figure label:

[0035] Busbar connection structure 100, electrical connector 10, first joint 12, busbar 30, second joint 31, second groove 33, heat sink 50, heat sink shell 51, accommodating cavity 510, heat conductor 52, heat sink pipe 54, heat dissipation liquid 56, second protrusion 58, intermediate layer 60, first groove 101, first protrusion 102. Detailed Implementation

[0036] 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.

[0037] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are 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.

[0038] 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.

[0039] The following is for reference. Figures 1-7 A bus connection structure 100 according to a first aspect embodiment of the present invention is described.

[0040] The bus connection structure 100 according to the embodiments of the present invention is intended to realize current distribution in an electrical system. Therefore, the bus connection structure 100 is applicable to a variety of application fields, and this application does not limit the application fields of such bus connection structure 100.

[0041] In the following description of this application, the application of the bus connection structure 100 in a battery pack is used as an example. After reading the following description, those skilled in the art can easily understand how the application of the bus connection structure 100 can be extended to other fields.

[0042] like Figure 1 As shown, the bus connection structure 100 according to an embodiment of the present utility model includes: an electrical connector 10 for electrical components, a busbar 30, and a heat sink 50.

[0043] Electrical connector 10 is used to realize the electrical connection between bus connection structure 100 and electrical components. Busbar 30 is used to concentrate and distribute current.

[0044] Combination Figure 2 and Figure 3 The electrical connector 10 is provided with a first connecting part 12. The busbar 30 is provided with a second connecting part 31, which is connected to the first connecting part 12.

[0045] The connection between the first joint 12 and the second joint 31 helps to achieve efficient current transmission.

[0046] In some alternative embodiments, the first coupling portion 12 and the second coupling portion 31 are configured with a matching structure. For example, a protrusion and groove mating form is used. This matching structure ensures the stability of the electrical connection. Specifically, the protrusion can be precisely embedded in the corresponding groove, which not only enhances the strength of the physical connection but also effectively reduces contact resistance and energy loss. In addition, this structure helps prevent loosening and poor contact, ensuring long-term stable performance even under some high vibration or dynamic load conditions.

[0047] In addition, the first and second connecting structures can be further reinforced by welding or other fixing methods to ensure the safe and reliable operation of the entire bus connection structure 100.

[0048] As mentioned in the background section, considering the actual application scenarios of the bus connection structure 100, the first connection structure will use copper components, and the second connection structure will use aluminum components. Due to the different coefficients of thermal expansion of copper and aluminum, the connection points may loosen over long-term use, leading to increased contact resistance. To ensure the stability and safety of the bus connection structure 100, such as... Figures 1-3 As shown, the bus connection structure 100 of this application also includes a heat sink 50.

[0049] The heat sink 50 helps dissipate heat from the busbar connection structure 100, reducing temperature rise in the connection area and thus reducing the risk of loosening due to the different coefficients of thermal expansion of materials such as copper and aluminum. This not only helps improve the stability of the busbar connection structure 100 and extend its service life, but also helps reduce the risk of damage to electrical components.

[0050] It is worth noting that in some optional embodiments, the first and second bonding structures may use metal components of the same material. For example, both the first and second bonding structures may use copper components. Under high current density conditions, by providing the heat sink 50, localized overheating can be reduced or even avoided, improving the connection stability of the bus and electrical components.

[0051] Specifically, the heat sink 50 is located on the busbar 30.

[0052] In some alternative embodiments, the heat sink 50 can be directly fixed to the surface of the busbar 30, and a thermally conductive adhesive layer or thermally conductive pad is provided between the heat sink 50 and the surface of the busbar 30. By providing a thermally conductive medium to fill the tiny gap between them, heat transfer efficiency is improved. This arrangement simplifies the installation process and ensures that heat can be rapidly transferred from the busbar 30 to the heat sink 50.

[0053] In some alternative embodiments, see [link to relevant documentation] Figure 2 The heat sink 50 can be partially or completely embedded within the busbar 30. For example, the busbar 30 can have pre-set channels or slots for inserting heat sinks or cooling pipes. This configuration enables effective heat dissipation of the system while also utilizing space and reducing the overall size.

[0054] Alternatively, in some alternative embodiments, the heat sink 50 is attached to at least one side of the busbar 30. This arrangement allows for quick assembly and disassembly of the heat sink 50 for easy maintenance and replacement without damaging the busbar 30 or other components. In this case, the heat sink 50 can be secured using clamps or pressure devices. The clamps or similar structures can employ known solutions in the prior art; however, the clamps or pressure devices themselves are not the core of this application and will not be described in detail here.

[0055] According to some embodiments of the present utility model, the bus connection structure 100, such as Figure 4 As shown, the heat sink 50 includes a heat sink housing 51 and a heat conductor 52. The heat sink housing 51 has a receiving cavity 510. The heat conductor 52 is located within the receiving cavity 510.

[0056] The heat conductor 52 is used to absorb and conduct the heat generated by the busbar 30. Optionally, the heat conductor 52 is made of a material with high thermal conductivity, such as graphite or other highly efficient thermally conductive materials. Because these materials have thermal conductivity, they can effectively reduce thermal resistance and ensure that heat is evenly distributed across the entire heat sink 50.

[0057] Combination Figure 2 The portion of the heat sink 51 that adheres to the busbar 30 absorbs the heat generated by the busbar 30 and transfers it to the heat-conducting component. Furthermore, this portion of the heat sink 51 can conduct the absorbed heat to areas of the heat sink 51 away from the busbar 30, thus distributing and dissipating it more widely into the environment. Therefore, the heat sink 51 optimizes the heat conduction path and ensures that heat is removed quickly and evenly from the busbar 30.

[0058] In this way, the heat sink 51 improves the heat dissipation efficiency of the bus 30, effectively reduces the operating temperature of the entire connection component, and prevents the electrical components and bus 30 from degrading or failing due to overheating.

[0059] Optionally, the heat sink 51 is made of a material with good thermal conductivity, such as aluminum alloy or copper alloy. This ensures that the heat transferred from the busbar 30 can be quickly diffused to the entire surface of the heat sink 51 and dissipated into the surrounding environment.

[0060] In some specific embodiments, such as Figure 4 As shown, the heat sink 50 also includes a heat sink 54 and a heat dissipation fluid 56, wherein the heat sink 54 has an encapsulated cavity. The heat dissipation fluid 56 fills the cavity.

[0061] In the above technical solution, the heat dissipation fluid 56 flows within the pipe cavity, which can evenly distribute the absorbed heat throughout the entire heat dissipation pipe 54, avoiding localized overheating. The flow of the heat dissipation fluid 56 allows heat to be transferred from the higher heat source area to the lower heat source area, and finally dissipated into the environment, improving the uniformity and efficiency of heat dissipation.

[0062] It is worth noting that the enclosed cavity is filled with a heat-dissipating liquid 56. This design ensures that the heat-dissipating liquid 56 will not leak or evaporate, thus providing long-term stable heat conduction performance. Heat is transferred to the heat-dissipating liquid 56 through the heat conductor 52, circulates within the enclosed cavity, is evenly distributed throughout the heat dissipation pipe 54, and is finally dissipated into the environment through the surface of the heat dissipation shell 51, achieving heat dissipation. At the same time, the enclosed cavity structure is simple and requires less maintenance, giving the manifold connection structure 100 greater flexibility in use.

[0063] Optionally, the heat dissipation fluid 56 is a liquid with a high specific heat capacity, which enables it to absorb a large amount of heat, further enhancing the heat exchange efficiency, ensuring that the manifold 30 and connecting components are maintained at a suitable operating temperature, improving the stability and reliability of the system, and extending the service life of the equipment.

[0064] Optionally, the heat pipe 54 is made of a thermally conductive material and is in direct contact with the heat conductor 52. When the busbar 30 generates heat, the heat is transferred through the heat conductor 52 to the heat dissipation fluid 56 inside the heat pipe 54. The heat dissipation fluid 56 absorbs the heat, thereby effectively removing the heat from the heat source.

[0065] Alternatively, the heat dissipation pipe 54 extends in at least one direction. This arrangement increases the contact area between the heat dissipation pipe 54 and the heat conductor 52 and the heat sink 51, allowing more heat to be transferred to the heat dissipation liquid 56, thereby improving heat dissipation efficiency.

[0066] More optimized, combined Figure 5 The heat dissipation pipe 54 is arranged in a meandering pattern along two different directions.

[0067] First, the meandering heat dissipation pipes 54 increase the contact area with the busbar 30, ensuring that heat is more effectively conducted to the cooling fluid 56. This not only improves heat transfer efficiency but also reduces thermal resistance, enabling the busbar connection structure 100 to operate stably.

[0068] Secondly, this design extends the flow path of the heat dissipation fluid 56 within the heat dissipation pipe 54, giving the heat dissipation fluid 56 more time and opportunity to absorb heat, thereby effectively preventing overheating.

[0069] In addition, the meandering arrangement allows for maximizing the length of the heat pipe 54 within a limited space, improving heat dissipation performance without increasing the external volume of the busbar connection structure 100. This satisfies the heat dissipation requirements for higher performance while maintaining the miniaturization and lightweight of the busbar connection structure 100.

[0070] According to some optional embodiments of the present invention, the volume of the heat dissipation liquid 56 accounts for less than 1% of the volume of the cavity.

[0071] As can be seen, the cavity is not completely filled with liquid. Reserving some space in the cavity helps improve the adaptability of the heat dissipation system. In practical applications, factors such as ambient temperature and workload may cause changes in the thermal expansion rate of the heat dissipation fluid 56. If the heat dissipation fluid 56 completely fills the cavity, the cavity structure may be damaged due to thermal expansion and contraction. The partial filling provides a buffer space, improving the reliability of the manifold connection structure 100.

[0072] Optionally, the heat dissipation fluid 56 may reach its boiling point during heat absorption and change from a liquid to a gaseous state, a process that causes its volume to increase. If the cavity is completely filled with liquid, there will not be enough space to accommodate the expanded volume when the liquid turns into gas, which may lead to a sharp increase in internal pressure, thereby damaging the structure of the heat dissipation system. Therefore, keeping the volume of the heat dissipation fluid 56 smaller than the volume of the cavity provides the necessary buffer space for thermal expansion and contraction, ensuring safety and stability in use.

[0073] In some alternative embodiments, the heat conductor 52 includes at least a portion of thermally conductive grease, thermally conductive silicone, phase change material, and metal heat dissipation adhesive.

[0074] In some technical solutions, the heat conductor 52 is a thermal grease. This is because thermal grease has a high thermal conductivity and good fluidity, which can fill tiny gaps and ensure the continuity of the heat conduction path.

[0075] In some technical solutions, the heat conductor 52 is a thermally conductive silicone component. This is because the thermally conductive silicone component has a certain degree of elasticity and flexibility, thus it can form a good thermal contact within the accommodating cavity 510 and provide a certain degree of mechanical buffering, ensuring heat dissipation while improving the reliability of the bus connection structure 100.

[0076] In some technical solutions, the heat conductor 52 is a phase change material component. This phase change material component undergoes a phase change at a specific temperature, such as changing from solid to liquid, solid to gas, or liquid to gas, thereby absorbing a large amount of heat and achieving a highly efficient heat dissipation effect.

[0077] In some technical solutions, the heat conductor 52 is a metal heat sink adhesive. It is known that metal heat sink adhesives typically contain highly thermally conductive metal particles such as silver and aluminum, thus possessing high thermal conductivity and good adhesive strength. It not only efficiently transfers heat but also provides a certain degree of fixation and sealing, thereby improving the reliability of the heat sink 50.

[0078] According to some optional embodiments of the present invention, one of the first joint portion 12 and the second joint portion 31 is a first protrusion 102 and the other is a first groove 101. The first protrusion 102 is inserted into the first groove 101 and the first protrusion 102 is welded to the first groove 101.

[0079] The cooperation between the first protrusion 102 and the first groove 101 ensures the reliability of the connection between the electrical components and the busbar 30, and improves the mechanical stability and shock resistance of the electrical system.

[0080] Optionally, the cross-section of the first protrusion 102 can be designed as a circle, or as a triangle. Alternatively, the cross-section of the first protrusion 102 can be designed as a trapezoid, rectangle, semicircle, or other regular or irregular shape. The first protrusion 102 in the above shapes can contact the corresponding first groove 101, thereby increasing the tightness of the connection between the two.

[0081] Optionally, at least one of the first protrusion 102 and the first groove 101 has chamfered edges. This makes it easier for the first protrusion 102 to be inserted into the first groove 101, reduces assembly resistance caused by sharp edges, helps improve assembly efficiency, and enhances the durability of the structure.

[0082] For further details, please refer to [link / reference]. Figure 2 The heat sink 50 and the electrical connector 10 are located on opposite sides of the busbar 30. Heat can be transferred directly from the electrical connector 10 to the heat sink 50 through the busbar 30. This arrangement ensures that heat can be quickly conducted to the heat sink 50 along the shortest path and further dissipated into the environment, improving heat transfer efficiency.

[0083] The arrangement of the two sides allows heat to be evenly diffused from the electrical connector 10 on one side of the busbar 30 to the heat sink 50 on the other side, and the heat sink shell 51 of the heat sink 50 is used for heat transfer and heat dissipation, so that the temperature distribution of the entire busbar 30 is more uniform and local overheating is avoided.

[0084] Furthermore, the layout on both sides can provide additional mechanical support, increasing the overall rigidity and seismic resistance of the busbar 30 and ensuring the long-term stable operation of the busbar connection structure 100.

[0085] Furthermore, the separate placement of the heat sink 50 and electrical connector 10 on opposite sides of the busbar 30 simplifies the installation and removal of these components. For example, maintenance personnel can more easily access the parts requiring maintenance without disassembling the entire system, reducing maintenance difficulty and costs.

[0086] Further, optionally, combined Figure 2 and Figure 3 The first joint 12 is a first groove 101, and the second joint 31 is a first protrusion 102. A second groove 33 is formed on the side opposite to the first protrusion 102 on the busbar 30, and the second groove 33 extends into the first protrusion 102. A second protrusion 58 is provided on the heat sink 50, and the second protrusion 58 is inserted into the second groove 33.

[0087] In the above technical solution, by providing a second groove 33 on the busbar 30 and a corresponding second protrusion 58 on the heat sink 50, the connection area between the heat sink 50 and the busbar 30 is increased, thereby increasing the heat conduction area between the two and improving the heat dissipation efficiency.

[0088] In addition, the second protrusion 58 is inserted into the second groove 33, forming a tight physical contact, reducing thermal resistance, so that heat can be quickly transferred from the busbar 30 to the heat sink 50 and efficiently dissipated through the heat sink 51.

[0089] Furthermore, this structure provides additional mechanical support to prevent loosening or damage caused by vibration or external stress, ensuring the stability and reliability of the bus connection structure 100.

[0090] In some optional embodiments, the cross-section of the second protrusion 58 is designed to be circular, or the cross-section of the second protrusion 58 is designed to be triangular, or the cross-section of the second protrusion 58 is designed to be trapezoidal, rectangular, semi-circular, or other regular or irregular shapes. The contact between the second protrusion 58 in the above shapes and the corresponding second groove 33 can increase the tightness of the connection between the two.

[0091] Optionally, at least one of the second protrusion 58 and the second groove 33 has chamfered corners. This makes it easier for the second protrusion 58 to be inserted into the second groove 33, reduces assembly resistance caused by sharp corners, and helps to improve assembly efficiency.

[0092] In some specific embodiments, the second protrusion 58 is interference-fitted within the second groove 33, and the second protrusion 58 is welded to the second groove 33.

[0093] The second protrusion 58 is slightly larger than the second groove 33, requiring a certain force to be applied during insertion. This tight fit reduces the gap between the second protrusion 58 and the second groove 33, thereby providing a stronger connection, reducing thermal resistance, and enhancing mechanical stability.

[0094] In addition to the interference fit, the second protrusion 58 is also fixed within the second groove 33 by welding. Welding further enhances the strength of the connection and can also resist thermal expansion and contraction caused by temperature changes, avoiding poor contact or loosening problems that may be caused by material deformation.

[0095] According to some optional embodiments, such as Figure 1 As shown, the busbar connection structure 100 also includes an intermediate layer 60, which is located within the first groove 101 and connected to the first protrusion 102. The chemical potential of the intermediate layer 60 is located between the chemical potential of the electrical connector 10 and the chemical potential of the busbar 30.

[0096] The intermediate layer 60 serves as a transition, connecting the electrical components and the busbar 30. Simultaneously, the intermediate layer 60 possesses a certain degree of conductivity, enabling continuous and efficient current transmission. This helps improve the electrical contact quality between the electrical connector 10 and the busbar 30, reduces contact resistance, and enhances the overall system efficiency.

[0097] Optionally, the intermediate layer 60 can be a metallic layer such as a silver layer, gold layer, indium layer, titanium layer, zinc layer, iron layer, cobalt layer, nickel layer, molybdenum layer, tin layer, beryllium layer, or manganese layer. Metallic layers help improve conductivity and structural strength.

[0098] Alternatively, the intermediate layer 60 is an annular ring inserted into the first groove 101. This provides mechanical support and electrochemical protection, ensuring tight contact.

[0099] Alternatively, the intermediate layer 60 may be a plating layer. The plating layer covers the inner surface of the first groove 101 or the outer peripheral surface of the first protrusion 102.

[0100] Alternatively, the intermediate layer 60 may be a plasma chemical vapor deposition layer with high electrical properties.

[0101] Alternatively, the intermediate layer 60 may be a vacuum magnetron sputtering layer, which enhances conductivity and mechanical strength by forming a more uniform and dense intermediate layer 60.

[0102] In some specific embodiments, such as Figure 6 and Figure 7 As shown, an internal thread is formed in the first groove 101, and a matching external thread is provided on the first protrusion 102.

[0103] The threaded connection enhances the mechanical connection strength and stability between the electrical connector 10 and the busbar 30, ensuring tight contact, reducing the risk of loosening, and strengthening the reliability of the conductive path. Furthermore, the additional surface area provided by the threaded connection further improves current transmission efficiency.

[0104] The battery power distribution unit according to a second aspect of the present invention includes a bus connection structure 100 according to a first aspect of the present invention, and the electrical components include at least one of a relay and a fuse.

[0105] It's worth noting that battery distribution units 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, and integrate relays and fuses to provide overload and short-circuit protection. Alternatively, battery distribution units can be used in home or industrial energy storage systems, where they control and distribute the electrical energy stored in the battery, supporting energy flow between the grid connection and other loads, thereby ensuring the safe operation of the system. Battery distribution units can also be used in other scenarios such as battery packs.

[0106] The improved busbar connection structure 100 reduces the temperature of the connection area between the electrical components and the busbar 30, effectively preventing overheating and high-temperature failure. The improved busbar connection structure 100 enhances the stability and reliability of the electrical components, extends their service life, and ensures the safety and reliability of the power system. Simultaneously, it reduces energy loss due to temperature increases, contributing to improved energy efficiency.

[0107] When the electrical component is a relay, the optimized bus connection structure 100 is used to connect the relay and the bus 30, which enhances the mechanical connection strength and stability between the two, ensures tight contact, reduces the risk of loosening, helps to improve current transmission efficiency, reduces contact resistance, and achieves more reliable power distribution and control.

[0108] When the electrical component is a fuse, the improved bus connection structure 100 helps to improve the thermal stability between the fuse and the busbar 30, reduce overheating, and ensure the reliability of the circuit protection function.

[0109] 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.

[0110] By adopting an improved battery power distribution unit, the performance and safety of the battery pack can be enhanced, ensuring efficient and stable current distribution.

[0111] 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.

[0112] It is worth noting that the electrical device can be a new energy vehicle, etc. By adopting the battery pack of the third aspect embodiment of this utility model, the safety of the electrical device is improved.

[0113] The following is for reference. Figure 1 - Figure 7 The bus connection structure 100 according to an embodiment of the present invention is described in detail with reference to 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.

[0114] Reference Figure 1 The bus connection structure 100 includes: electrical connectors 10 for electrical components, busbars 30, heat sinks 50, and an intermediate layer 60.

[0115] Reference Figures 2-3 , Figures 6-7 The electrical connector 10 is provided with a first joint portion 12. The first joint portion 12 is a first groove 101.

[0116] The busbar 30 is provided with a second joint 31, which is a first protrusion 102. An internal thread is formed in the first groove 101, and an external thread is provided on the first protrusion 102.

[0117] The first protrusion 102 is connected to the first groove 101.

[0118] A second groove 33 is formed on the side of the busbar 30 opposite to the first protrusion 102, and the second groove 33 extends into the first protrusion 102.

[0119] Heat sink 50 is located on busbar 30.

[0120] The heat sink 50 and the electrical connector 10 are located on opposite sides of the busbar 30.

[0121] Reference Figure 4 The heat sink 50 includes: a heat sink shell 51, a heat conductor 52, a heat pipe 54, a heat dissipation liquid 56, and a second protrusion 58.

[0122] The heat sink 51 has a cavity 510 inside. The heat conductor 52 is located inside the cavity 510.

[0123] The heat sink 54 is disposed within the accommodating cavity 510, and the heat sink 54 has an encapsulated cavity.

[0124] Reference Figure 5 The heat dissipation fluid 56 fills the cavity. The volume of the heat dissipation fluid 56 accounts for less than 1% of the cavity volume.

[0125] The second protrusion 58 is interference-fitted within the second groove 33, and the second protrusion 58 is welded to the second groove 33.

[0126] The intermediate layer 60 is an annular ring inserted into the first groove 101, and is also connected to the first protrusion 102. The chemical potential of the intermediate layer 60 is located between the chemical potential of the electrical connector 10 and the chemical potential of the busbar 30.

[0127] Other components of the bus connection structure 100 according to the embodiments of the present invention, such as battery power distribution units, battery packs, and power-consuming devices, as well as their operation, are known to those skilled in the art and will not be described in detail here.

[0128] 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.

[0129] 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 bus connection structure, characterized in that, include: An electrical connector for an electrical component, wherein the electrical connector is provided with a first connecting portion; A busbar, wherein the busbar is provided with a second connecting portion, the second connecting portion being connected to the first connecting portion; A heat sink is disposed on the busbar.

2. The bus connection structure according to claim 1, characterized in that, The heat sink includes: A heat dissipation shell, wherein a receiving cavity is provided inside the heat dissipation shell; A heat conductor, which is located within the accommodating cavity.

3. The bus connection structure according to claim 2, characterized in that, The heat sink also includes: A heat dissipation pipe having an encapsulated cavity inside; A heat-dissipating liquid, which fills the cavity.

4. The bus connection structure according to claim 3, characterized in that, The volume of the heat dissipation fluid accounts for less than 1% of the volume of the cavity.

5. The bus connection structure according to claim 2, characterized in that, The heat conductor includes at least a portion of thermally conductive silicone grease, thermally conductive silicone, phase change material, and metal heat dissipation adhesive.

6. The bus connection structure according to any one of claims 1-5, characterized in that, One of the first joint and the second joint is a first protrusion and the other is a first groove. The first protrusion is inserted into the first groove and is welded to the first groove.

7. The bus connection structure according to claim 6, characterized in that, The heat sink and the electrical connector are located on opposite sides of the busbar.

8. The bus connection structure according to claim 7, characterized in that, The first joint portion is a first groove, and the second joint portion is a first protrusion; A second groove is formed on the side of the busbar opposite to the first protrusion, and the second groove extends into the first protrusion; The heat sink is provided with a second protrusion, which is inserted into the second groove.

9. The bus connection structure according to claim 8, characterized in that, The second protrusion is interference-fitted into the second groove, and the second protrusion is welded to the second groove.

10. The bus connection structure according to claim 6, characterized in that, It also includes an intermediate layer, which is located within the first groove and connected to the first protrusion; The chemical potential of the intermediate layer lies between the chemical potential of the electrical connector and the chemical potential of the busbar.

11. The bus connection structure according to claim 10, characterized in that, The intermediate layer is an annular ring and is inserted into the first groove; Or the intermediate layer may be a plating layer; Alternatively, the intermediate layer may be a plasma chemical vapor deposition layer; Alternatively, the intermediate layer may be a vacuum magnetron sputtering layer.

12. The bus connection structure according to claim 6, characterized in that, An internal thread is formed in the first groove, and a matching external thread is provided on the first protrusion.

13. A battery power distribution unit, characterized in that, The bus connection structure includes any one of claims 1-12, wherein the electrical component includes at least one of a relay and a fuse.

14. A battery pack, characterized in that, Includes the battery power distribution unit according to claim 13.

15. An electrical appliance, characterized in that, Includes the battery pack according to claim 14.

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