Busbar connecting piece

Abstract

The utility model discloses a busbar connecting piece which comprises a conductive busbar, a braid layer and an outer sheath layer. The design of the braid layer allows the cable to adapt to conductive busbars with different outer diameters, and provides good versatility and protection effect. And the outer sheath layer is made of a ceramic silicone rubber material, so that a hard protection layer can be formed in a fire condition, the conductive busbar is prevented from being broken or short-circuited, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical connectors, in particular to a busbar connector. Background Art

[0002] In existing electric vehicle power supply connection systems, busbars are typically used for power transmission connections. This busbar structure generally includes a conductor and an insulating layer covering the conductor to achieve an insulating and sealing effect. The safety of electric vehicles, especially fire safety, is becoming increasingly important. The insulation layer in existing busbar structures has poor fire resistance. If the busbar thermal runaway temperature reaches 1100°C, without the protection of the insulation layer, the busbar will melt and overflow. When the external temperature is low, the melted busbar will splash onto the positive and negative poles of the battery cell, causing accidents such as short circuits. Therefore, it is necessary to provide a busbar connector to further improve fire safety. Utility Model Content

[0003] Aiming at the technical problem that the insulation layer in the existing busbar structure has poor fire resistance, the utility model provides a busbar connector.

[0004] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0005] A busbar connector, comprising:

[0006] A conductive busbar, comprising a busbar body and connection terminals provided at both ends of the busbar body for conductive connection;

[0007] A braided layer is sleeved on the outside of the conductive busbar;

[0008] The outer sheath layer is formed by extruding a material including ceramic silicone rubber and coating the outer portion of the braided layer.

[0009] Optionally, the conductive busbar is made of copper, aluminum or aluminum alloy.

[0010] Optionally, the conductive busbar is formed by stacking a single layer of metal foil or multiple layers of metal foil, and the cross section of the busbar body is rectangular.

[0011] Optionally, the conductive busbar is formed by twisting a plurality of conductive cores, and the cross-section of the busbar body is circular.

[0012] Optionally, the conductive busbar is cylindrical or hollow cylindrical, and the cross-section of the busbar body is circular or annular.

[0013] Optionally, the braided layer is formed by braiding nylon or polyethylene terephthalate material.

[0014] Optionally, the busbar connector further includes a heat shrink layer, which is provided between the braided layer and the outer sheath layer, and the heat shrink layer is formed by heating and shrinking at least one layer of heat shrink tubing.

[0015] Optionally, the busbar connector further includes a fireproof layer, which is formed by a ceramic silicone rubber composite tape wrapped around the outside of the conductive busbar.

[0016] Optionally, the busbar connector further includes a fireproof layer, which is formed by winding a ceramic silicone rubber composite tape around the outside of the braided layer.

[0017] Optionally, the connecting end is provided with at least one through hole.

[0018] This busbar connector includes a conductive busbar, a braided layer, and an outer sheath. The braided layer design allows it to accommodate busbars of varying outer diameters, providing excellent versatility and protection. The outer sheath, made of ceramic silicone rubber, forms a hard protective layer in fire conditions, preventing the busbar from breaking or shorting, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of a busbar connector of the present utility model;

[0021] Figure 2 This is a cross-sectional view of an embodiment of a busbar connector of the present utility model;

[0022] Figure 3 This is a cross-sectional view of another embodiment of the busbar connector of the present utility model;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of another embodiment of the busbar connector of the present utility model;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of another embodiment of the busbar connector of the present invention.

[0025] Description of Figure Numbers:

[0026]

[0027]

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or solutions that meet both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] See also Figure 1-5One embodiment of the present invention provides a busbar connector 100 comprising a conductive busbar 10, a braided layer 20, and an outer sheath 30. Specifically, the conductive busbar 10 comprises a busbar body 11 and connecting terminals 12 disposed at both ends of the busbar body 11 for conductive connection. The braided layer 20 is sheathed over the conductive busbar 10. The outer sheath 30 is formed by extruding a material comprising ceramic silicone rubber and coating the braided layer 20.

[0034] It can be understood that the braided layer 20 is sleeved on the outside of the conductive busbar 10. Since the inner diameter of the braided layer 20 will change when the braided layer 20 is axially stretched and squeezed to change the braiding angle, the braided layer 20 will also change accordingly. Therefore, the braided layer 20 of the same structure can pass through the conductive busbars 10 with different outer diameters, and has strong universal applicability, protecting the conductive busbar 10 from damage.

[0035] As can be understood, the outer sheath layer 30 is an important component of the busbar connector and is made of materials including ceramic silicone rubber. Ceramic silicone rubber is a new type of material prepared by adding special fillers (such as ceramic powder), flux, cross-linking agents and other additives to a silicone rubber matrix and then undergoing vulcanization and cross-linking. It not only has the high temperature resistance, aging resistance, and excellent electrical properties of ordinary silicone rubber, but is also flame-retardant, halogen-free, and low-smoke. It produces no corrosive or toxic gases during combustion and does not cause secondary harm to people. Moreover, when burned by flames, it can sinter into a hard ceramic shell that does not fall off, protecting the internal conductive busbar 10 from damage and ensuring normal power transmission.

[0036] Specifically, the outer sheath layer 30 is made of a material containing ceramic silicone rubber, which is vulcanized and cross-linked. The outer sheath layer 30 is extruded and coated on the outer surface of the braided layer 20, thereby protecting the conductive busbar 10 inside the outer sheath layer 30 from damage and ensuring normal power transmission of the conductive busbar 10. Using an extruder, the ceramic silicone rubber material is preheated and melted by a rotating screw. The resulting semi-finished conductive busbar 10, covered with the braided layer 20, is then passed into the extruder. Using a cold extrusion method with staged temperature control, the extruder is continuously extruded through a die head, where the ceramic silicone rubber is coated on the braided layer 20 and vulcanized and cross-linked to form the outer sheath layer 30.

[0037] Specifically, the outer jacket layer 30 comprises, in addition to the ceramic silicone rubber material, an expandable halogen-free flame retardant or thermoplastic polyurethane. This forms a dense, porous carbon foam layer on the surface of the braided layer 20, firmly adhering to the braided layer 20 and providing excellent thermal insulation, oxygen isolation, smoke suppression, and droplet prevention. It is understood that other materials, such as aramid fiber or polyvinyl chloride, may be added to the outer jacket layer 30.

[0038] In this embodiment, the busbar connector 100 comprises a conductive busbar 10, a braided layer 20, and an outer sheath 30. The design of the braided layer 20 allows it to accommodate busbars 10 of varying outer diameters, providing excellent versatility and protection. The outer sheath 30, made of ceramic silicone rubber, forms a hard protective layer in fire conditions, preventing the busbar 10 from breaking or shorting, thereby extending its service life.

[0039] In one embodiment, the conductive busbar 10 is made of copper, aluminum, or aluminum alloy, which can be selected according to actual needs.

[0040] In one embodiment, please refer to Figure 1 The conductive busbar 10 is formed by a single layer of metal foil or multiple layers of metal foil. The busbar body 11 has a rectangular cross-section, and the capacitance can be optimized by varying the layer stack. Specifically, the conductive busbar 10 can be formed by stacking copper foil, aluminum foil, or aluminum alloy foil. The conductive busbar 10 is flexible, allowing the entire structure to be easily bent in the thickness direction, facilitating installation and wiring.

[0041] It can be understood that the braided layer 20 is sleeved on the outside of the conductive busbar 10 formed by stacking multiple metal foil layers, which not only provides physical protection, but also improves electrical performance and heat dissipation performance, and is an important part of improving the overall performance of the busbar.

[0042] In one embodiment, please refer to Figure 2 The conductive busbar 10 is formed by twisting a number of conductive cores, that is, the conductive busbar 10 can be a stranded wire structure, and the cross section of the busbar body 11 is circular.

[0043] It can be understood that the twisted wire method can reduce the volume, simplify the structure and increase the transmission capacity. The conductive busbar 10 can be a steel core aluminum stranded wire, an aluminum core aluminum stranded wire or an aluminum alloy core aluminum stranded wire, and the specific selection can be made according to needs.

[0044] In one embodiment, please refer to Figure 3 The conductive busbar 10 is cylindrical or hollow cylindrical, and the cross section of the busbar body 11 is circular or annular.

[0045] As will be appreciated, the conductive busbar 10 is hollow cylindrical, and the busbar body 11 has a circular cross-section. Due to the skin effect of cylindrical conductors, hollow cylindrical conductors are lighter and more efficient. Of course, in other embodiments, the conductive busbar 10 may also be cylindrical, with the busbar body 11 having a circular cross-section, such as when the conductive busbar 10 has a solid conductor structure.

[0046] In one embodiment, the braided layer is formed from nylon or polyethylene terephthalate. Nylon has high tensile strength, high surface hardness, good creep resistance, high bending and impact strength, good ductility, and high wear resistance. Polyethylene terephthalate has excellent tensile strength, impact resistance, wear resistance, and toughness, and both have electrical insulation properties. Through process control of the braiding process, the braided layer can evenly cover the conductive busbar 10, protecting it from damage.

[0047] In one embodiment, please refer to Figure 4 The busbar connector 10 further includes a heat shrink layer 40 , which is disposed between the braided layer 20 and the outer sheath layer 30 . The heat shrink layer 40 is formed by heating and shrinking at least one layer of heat shrink tubing.

[0048] It can be understood that a heat shrink layer 30 is provided between the braided layer 20 and the outer sheath layer 30 to play the role of insulation, sealing and waterproofing, and at the same time can effectively fix the braided layer 20 to ensure the service life of the busbar connector 100.

[0049] In one embodiment, please refer to Figure 5 The busbar connector 10 further includes a fireproof layer 50 , which is formed by a ceramic silicone rubber composite tape wrapped around the outside of the conductive busbar 10 .

[0050] It is understood that the fireproof layer 50 can be wrapped in a wrapping manner, with the ceramic silicone rubber composite tape spirally wrapped around the outer wall of the busbar body 11. It can also be wrapped in a longitudinal wrapping manner, with the ceramic silicone rubber composite tape having an overlap arranged along the longitudinal direction of the busbar body 11 after wrapping.

[0051] In one embodiment, the busbar connector 10 further includes a fireproof layer 50, which is formed by wrapping a ceramic silicone rubber composite tape around the outside of the braided layer 20. The ceramic silicone rubber composite tape of the fireproof layer 50 can further achieve a fireproof effect.

[0052] In one embodiment, the busbar connector 10 further includes a fireproof layer 50 and a heat-shrinkable layer 40. The fireproof layer 50 is formed by wrapping a ceramic silicone rubber composite tape around the exterior of the conductive busbar 10. The heat-shrinkable layer 40 is disposed between the braided layer 20 and the outer sheath 30 and is formed by heating and shrinking at least one layer of heat-shrinkable tubing.

[0053] In one embodiment, the busbar connector 10 further includes a fireproof layer 50 and a heat-shrinkable layer 40. The fireproof layer 50 is formed by wrapping a ceramic silicone rubber composite tape around the braided layer 20. The heat-shrinkable layer 40 is disposed between the fireproof layer 50 and the outer sheath 30 and is formed by heating and shrinking at least one layer of heat-shrinkable tubing.

[0054] As will be appreciated, the fireproof layer 50 can be wrapped in a wrapping manner, with the ceramic silicone rubber composite tape spirally wrapped around the outer wall of the busbar body 11 or the braided layer 20. Alternatively, the wrapping can be performed longitudinally, with the ceramic silicone rubber composite tape having overlaps longitudinally along the busbar body 11 or the braided layer 20. A heat shrink layer 30 is provided between the braided layer 20 and the outer sheath layer 30, or between the fireproof layer 50 and the outer sheath layer 30, to provide insulation, sealing, and waterproofing, while also effectively securing the braided layer 20 to ensure the service life of the busbar connector 100.

[0055] In one embodiment, please refer to Figure 1-3 The connection end 12 of the conductive busbar 10 is provided with at least one through hole for easy connection with other structures.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A busbar connector, characterized in that: include: A conductive busbar, comprising a busbar body and connection terminals provided at both ends of the busbar body for conductive connection; A braided layer is sleeved on the outside of the conductive busbar; The outer sheath layer is formed by extruding a material including ceramic silicone rubber and coating the outer portion of the braided layer.

2. The busbar connector according to claim 1, characterized in that: The conductive busbar is made of copper, aluminum or aluminum alloy.

3. The busbar connector according to claim 1, characterized in that: The conductive busbar is formed by stacking a single layer of metal foil or multiple layers of metal foil, and the cross section of the busbar body is rectangular.

4. The busbar connector according to claim 1, characterized in that: The conductive busbar is formed by twisting a plurality of conductive cores, and the cross section of the busbar body is circular.

5. The busbar connector according to claim 1, characterized in that: The conductive busbar is cylindrical or hollow cylindrical, and the cross section of the busbar body is circular or annular.

6. The busbar connector according to claim 1, characterized in that: The braided layer is formed by braiding nylon or polyethylene terephthalate material.

7. The busbar connector according to claim 1, characterized in that: The busbar connector further includes a heat shrink layer, which is provided between the braided layer and the outer sheath layer. The heat shrink layer is formed by heating and shrinking at least one layer of heat shrink tubing.

8. The busbar connector according to claim 1, characterized in that: The busbar connector also includes a fireproof layer, which is formed by wrapping a ceramic silicone rubber composite tape around the outside of the conductive busbar.

9. The busbar connector according to claim 1, characterized in that: The busbar connector also includes a fireproof layer, which is formed by wrapping a ceramic silicone rubber composite tape around the outside of the braided layer.

10. The busbar connector according to claim 1, characterized in that: The connecting end is provided with at least one through hole.

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