Halogen-free fireproof extruded busbar

Abstract

The invention relates to the technical field of busbar structures, in particular to a halogen-free fire-resistant extruded busbar, which comprises an extruder, a cooling dryer, a detector, a bending machine, a peeler and a puncher, and is characterized in that the extruder penetrates through a busbar structure layer and extrudes a halogen-free fire-resistant insulating layer coating the surface of the busbar structure layer to form the halogen-free fire-resistant extruded busbar; and the halogen-free fire-resistant extruded busbar passes through a cooling dryer, a detector, a bending machine, a peeler and a perforating machine to finally obtain a halogen-free fire-resistant extruded busbar finished product. The halogen-free fireproof extruded busbar structure has the advantages of simple production process, easy control of processing precision, high automation degree, multi-dimensional molding, reasonable and compact structure, convenient installation, beautiful and elegant appearance and the like, and has good mechanical properties, environmental protection performance, fireproof performance and insulating performance; the safety of the busbar and the battery pack is greatly improved, and a powerful guarantee is provided for the safety of the whole vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of busbar structure, in particular to a halogen-free fireproof extruded busbar. BACKGROUND

[0002] The Ministry of Industry and Information Technology organizes the revision and upgrading of the standard of "Electric Vehicle Safety Requirements" as a mandatory standard. At the same time, "Safety Requirements for Power Accumulator for Electric Vehicles" also requires that the battery pack or system should provide a thermal event alarm signal 5 minutes before the heat diffusion caused by the thermal runaway of a single battery leads to a dangerous situation in the passenger compartment. Therefore, when the battery cell catches fire, the fireproof material has flame retardation, prevents the connection bus between modules from being punctured to cause electric leakage and flashover, delays the spread of fire, and increases the escape time. It is of great significance to provide professional thermal management solutions for battery cell level, module level and Pack level to meet a series of new challenges and requirements.

[0003] The prior art is to wrap mica or ceramic silicone tape on the inner surface or outer surface of the busbar insulation layer to ensure the halogen-free fireproof performance of the battery pack. This product has a complex production process, a large overall thickness, and is prone to interference, which increases the risk of electric leakage and other risks. It poses a serious challenge to the increasingly compact battery pack design. Therefore, we propose a halogen-free fireproof extruded busbar to solve the above problems. SUMMARY

[0004] The present application aims to provide a halogen-free fireproof extruded busbar to solve the problem of wrapping mica or ceramic silicone tape on the inner surface or outer surface of the busbar insulation layer to ensure the halogen-free fireproof performance of the battery pack, which has a complex production process, a large overall thickness, and is prone to interference, which increases the risk of electric leakage and other risks.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a halogen-free fireproof extruded busbar, comprising an extruder, a cooling dryer, a detector, a bending machine, a peeling machine and a puncher, the extruder passes through a busbar structure layer and extrudes a halogen-free fireproof insulation layer covering the surface of the busbar structure layer to form a halogen-free fireproof extruded busbar, and the halogen-free fireproof extruded busbar is further subjected to the cooling dryer, the detector, the bending machine, the peeling machine and the puncher to finally obtain a halogen-free fireproof extruded busbar product.

[0006] Preferably, the busbar structure layer is L-shaped and made of red copper profile with an electrical conductivity D of 58 S / m or more, and the surface of the copper profile is plated with a nickel layer with a thickness of 3-7 microns.

[0007] Preferably, the thickness of the busbar structure layer is 1-10 mm, and the thickness of the halogen-free fireproof insulation layer is 1-1.5 mm.

[0008] Preferably, the halogen-free fireproof insulation layer is a quartz fireproof polyolefin material.

[0009] Preferably, the single-sided gap between the busbar structure layer and the halogen-free fireproof insulation layer is no more than 0.15 mm.

[0010] Preferably, the halogen-free fireproof insulation layer has a halogen-free fireproof performance of 1200℃ high-temperature fire for 10 min, a long-term temperature resistance of 115℃, and a flame-retardant level of UL94-V0.

[0011] Preferably, the halogen-free fireproof insulation layer is coated on the outer surface of the busbar structure layer, and has a working voltage of 1500V-DC, a dielectric strength of ≥20MV / m, and a volume resistivity of ≥1.0×1012Ω.m at 20℃.

[0012] Preferably, the busbar structure layer and the halogen-free fireproof insulation layer material and product meet the halogen-free requirements of RoHS, REACH, and ELV.

[0013] Compared with the prior art, the present application has the following beneficial effects: 1. The present application uses a halogen-free fireproof extruded busbar structure, coats the halogen-free fireproof insulation layer on the busbar structure layer through an extruder, and then processes through the processes of water cooling, drying, online detection, automatic bending, peeling, and punching, to finally obtain a product with the advantages of simple production process, easy-to-control processing precision, high automation, multi-dimensional molding, reasonable and compact structure, easy installation, and beautiful appearance, and has good mechanical properties, environmental protection performance, fireproof performance, and insulation performance, greatly improving the safety of the busbar and the battery pack, and providing a strong guarantee for vehicle safety. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0015] Figure 1 The flowchart of the present application; Figure 2 The structure front view schematic diagram of the present application; Figure 3 The structure front view schematic diagram of the present application;

[0016] In the figure: 1, extruder; 2, cooling dryer; 3, detection machine; 4, bending machine; 5, peeling machine; 6, punching machine; 7, busbar structure layer; 8, halogen-free fireproof insulation layer. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-3 The present invention provides an embodiment of a halogen-free refractory extruded busbar, comprising an extruder 1, a cooling dryer 2, an inspection machine 3, a bending machine 4, a peeling machine 5, and a punching machine 6. The extruder 1 passes through the busbar structure layer 7 and extrudes a halogen-free refractory insulation layer 8 covering the surface of the busbar structure layer 7. The busbar structure layer 7 and the halogen-free refractory insulation layer 8 are naturally superimposed to form a halogen-free refractory extruded busbar semi-finished product. The halogen-free refractory extruded busbar semi-finished product is shaped, dried, inspected online, and automatically bent by the cooling dryer 2, the inspection machine 3, the bending machine 4, and the peeling machine 5. The end part of the busbar structure layer 7 is de-covered by the peeling machine 5 to remove the halogen-free refractory insulation layer 8, exposing the end part. Then, the end part is punched by the punching machine 6 to form a halogen-free refractory extruded busbar, and finally a halogen-free refractory extruded busbar finished product is obtained. This device, through the design of busbar structure layer 7 and halogen-free fire-resistant insulation layer 8, solves the problem of wrapping mica or ceramic silicone tape on the inner or outer surface of the busbar insulation layer to ensure the halogen-free fire-resistant performance of the battery pack. However, the product manufacturing process is relatively complex, the overall thickness of the product is large, and it is prone to interference, leakage and other risks.

[0019] Furthermore, the busbar structure layer 7 is L-shaped, made of copper profile with a conductivity D≥58 S / m, and the surface of the copper profile is plated with a nickel layer with a thickness of 3-7 μm. Alternatively, the busbar structure layer 7 can also be an aluminum profile conductor. Figure 2 As shown, this structure is used to ensure excellent electrical conductivity and surface hardness.

[0020] Furthermore, the thickness of the copper busbar structure layer 7 (1-10 mm) and the thickness of the halogen-free fire-resistant insulation layer 8 (1-1.5 mm) are both specified. Figure 3 As shown, this structure ensures processing feasibility and meets general usage requirements through the thickness of the busbar structure layer 7, while the thickness of the halogen-free refractory insulation layer 8 ensures excellent insulation, wear resistance, and halogen-free refractory properties.

[0021] Furthermore, the halogen-free refractory insulation layer 8 is made of quartz fire-resistant polyolefin material, mainly composed of polyolefin, vitrifying powder, filler, additives, and orange masterbatch. For example... Figure 2 As shown, this structure utilizes quartz fire-retardant polyolefin materials, which possess excellent insulation, halogen-free fire resistance, flame retardancy, aging resistance, impact resistance, and wear resistance.

[0022] Further, the single-sided gap between the busbar structure layer 7 and the halogen-free fireproof insulation layer 8 is not more than 0.15 mm. As shown in Figure 2 and Figure 3 , the structure is used to ensure the product surface quality and dimensional accuracy by the single-sided gap not more than 0.15 mm.

[0023] Further, the halogen-free fireproof insulation layer 8 can achieve the halogen-free fireproof performance of 1200℃ high temperature fire for 10 min, long-term temperature resistance of 115℃, and the flame retardant level can reach UL94-V0. As shown in the figure, the structure is used to ensure the excellent fire resistance and long-term working conditions of the busbar structure layer 7 by the halogen-free fireproof insulation layer 8.

[0024] Further, the halogen-free fireproof insulation layer 8 is coated on the outer surface of the busbar structure layer 7, which can achieve a working voltage of 1500V-DC, a dielectric strength of the halogen-free fireproof insulation layer 8 ≥20MV / m, and a volume resistivity ≥1.0×1012Ω.m at 20℃. As shown in Figure 2 , the structure is used to ensure the excellent insulation of the busbar by the halogen-free fireproof insulation layer 8.

[0025] Further, the materials and products of the busbar structure layer 7 and the halogen-free fireproof insulation layer 8 meet the halogen-free requirements of RoHS, REACH, and ELV. As shown in Figure 2 and Figure 3 , the structure is used to meet the import and export conditions by the materials and products meeting the halogen-free requirements of RoHS, REACH, and ELV.

[0026] Working principle: before use, as shown in Figure 1 and Figure 2 , the halogen-free fireproof insulation layer 8 is coated on the outer surface of the busbar structure layer 7 by the extruder 1, and the busbar structure layer 7 and the halogen-free fireproof insulation layer 8 are naturally superimposed to form a halogen-free fireproof extruded busbar semi-finished product. The halogen-free fireproof extruded busbar semi-finished product is then shaped and dried by the cooling dryer 2, detected by the detection machine 3, automatically bent by the bending machine 4, and the end part of the busbar structure layer 7 is removed by the peeling machine 5 to expose the end part of the busbar structure layer 7. Then, the punching machine 6 is used for punching to form a halogen-free fireproof extruded busbar, and finally a halogen-free fireproof extruded busbar finished product is obtained. When in use, as shown in Figure 2 and Figure 3 , the characteristics of the busbar structure layer 7 and the halogen-free fireproof insulation layer 8 can withstand 1200℃ temperature fire for 10 min and long-term temperature resistance of 115℃, ensuring the excellent halogen-free fire resistance and long-term working conditions of the busbar structure layer 7, and achieving a working voltage of 1500V-DC. The above is the entire working principle of the present application.

[0027] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims with respect to the figures of the patent document.

Claims

1. A halogen-free refractory extruded busbar, comprising an extruder (1), a cooling dryer (2), an inspection machine (3), a bending machine (4), a peeling machine (5), and a punching machine (6), characterized in that: The extruder (1) passes through the busbar structure layer (7) and extrudes a halogen-free refractory insulation layer (8) covering the surface of the busbar structure layer (7) to form a halogen-free refractory extruded busbar. The halogen-free refractory extruded busbar then passes through a cooling dryer (2), an inspection machine (3), a bending machine (4), a peeling machine (5), and a punching machine (6) to finally obtain the finished halogen-free refractory extruded busbar.

2. The halogen-free refractory extruded busbar according to claim 1, characterized in that: The busbar structure layer (7) is L-shaped and made of copper profile with a conductivity D≥58 S / m. The surface of the copper profile is plated with a nickel layer with a thickness of 3-7μm.

3. The halogen-free refractory extruded busbar according to claim 1, characterized in that: The thickness of the copper busbar in the busbar structure layer (7) is 1 to 10 mm, and the thickness of the halogen-free fire-resistant insulation layer (8) is 1 to 1.5 mm.

4. The halogen-free refractory extruded busbar according to claim 1, characterized in that: The halogen-free fire-resistant insulation layer (8) is a quartz fire-resistant polyolefin material.

5. The halogen-free refractory extruded busbar according to claim 1, characterized in that: The single-sided gap between the busbar structure layer (7) and the halogen-free fire-resistant insulation layer (8) shall not exceed 0.15 mm.

6. The halogen-free refractory extruded busbar according to claim 1, characterized in that: The halogen-free fire-resistant insulation layer (8) has a halogen-free fire-resistant performance that can withstand a high temperature of 1200℃ for 10 minutes and a long-term temperature resistance of 115℃. Its flame retardant rating can reach UL94-V0.

7. The halogen-free refractory extruded busbar according to claim 1, characterized in that: The halogen-free fire-resistant insulation layer (8) is wrapped on the outer surface of the busbar structure layer (7) and can reach a working voltage of 1500V-DC. The dielectric strength of the halogen-free fire-resistant insulation layer (8) is ≥20MV / m and the volume resistivity at 20℃ is ≥1.0×1012Ω.m.

8. The halogen-free refractory extruded busbar according to claim 1, characterized in that: The materials and products of the busbar structure layer (7) and the halogen-free fire-resistant insulation layer (8) comply with RoHS, REACH, and ELV halogen-free requirements.

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