Sealed busbar and method for manufacturing sealed busbar

Abstract

The invention relates to a method for producing a sealed busbar (10), in which first a metal busbar (1) having a plurality of busbar connections (1a, 1b, 1c, 1d) is provided and then one or more individual sealing means (3) are arranged in predetermined positions (P) of the metal busbar (1); wherein, immediately after the arrangement, the metal busbar (1) is injection-molded with a plastic injection-molding section (2) around the region of the sealing means (3) by means of an injection-molding device, at least the sealing means (3) is completely injection-molded.

Description

[0001] Specification:

[0002] The present invention relates to a sealed busbar and a method for manufacturing a sealed busbar.

[0003] When manufacturing a sealed busbar, a sealing mechanism is arranged around the busbar and is usually encapsulated by plastic injection molding. However, before injection molding and encapsulating the sealing mechanism, the sealing mechanism must be conventionally fixed to the busbar to ensure the sealing function. For this purpose, the sealing mechanism is heated and / or cooled and / or bonded.

[0004] However, these especially continuous processing steps are very complex and time-consuming, and thus costly.

[0005] Therefore, the object of the present invention is to provide a sealed busbar and a method for manufacturing a sealed busbar, in which the complexity and number of manufacturing steps are reduced and the manufacturing method is optimized.

[0006] This object is solved by the combination of features described in claim 1 of the patent.

[0007] A method for manufacturing a sealed busbar is proposed according to the present invention, in which first a metal busbar, especially an electrically conductive busbar, having a plurality of busbar joints is provided, and then one or more individual sealing mechanisms are arranged at predetermined positions of the metal busbar. After the arrangement, the metal busbar is immediately injection molded and encapsulated with a plastic injection molding encapsulation part around the area of the sealing mechanism, and at least the sealing mechanism is completely injection molded and encapsulated.

[0008] Doing so is advantageous in that the manufacturing cycle is shortened due to the reduction of the method steps before injection molding and encapsulation. In particular, before injection molding and encapsulating the sealing mechanism with the plastic injection molding encapsulation part, it is not necessary to heat and cool the sealing mechanism, thereby reducing the required energy and the thermal load on the components. The plastic injection molding encapsulation part is preferably manufactured by means of insert molding.

[0009] In a preferred embodiment of the method, the sealing mechanism is a heat-shrinkable tube and / or a heat-shrinkable film. During the injection molding and encapsulation process, the heat-shrinkable tube is heated by the thermal energy of the plastic injection molding encapsulation part, especially by the melt of the plastic injection molding encapsulation part, so that the heat-shrinkable tube shrinks until it is tightly sealed against the metal busbar. In this way, a very strong sealing effect or an improved sealing effect is achieved. In addition, compared with a rubber sealing ring, there are no special requirements for the geometric structure or shape of the metal busbar.

[0010] In an advantageous embodiment variant, the heat-shrinkable tube is a double-walled heat-shrinkable tube, and a coating of hot-melt adhesive is arranged on the inner surface of the heat-shrinkable tube. Here, it is advantageous that the hot-melt adhesive can be melted during the shrinking process, so that the heat-shrinkable tube adheres to the metal. In addition, the outer layer of the double-walled heat-shrinkable tube can be combined with and embedded in the injection-molded part during the injection molding process. Thereby, the sealing effect is improved. In addition, the following embodiment can also be envisaged, in which the outer surface of the heat-shrinkable tube has a coating of adhesive, especially hot-melt adhesive. Thereby, adhesion is generated or increased between the outer surface of the heat-shrinkable tube and the plastic injection-molded encapsulation part.

[0011] In an embodiment of the method, it is stipulated that the heat-shrinkable tube is cut by means of a cutting device before being arranged at a predetermined position according to the metal busbar. In this way, the heat-shrinkable tube can be optimally matched to the metal busbar or the predetermined position of the metal busbar, and the heat-shrinkable tube is arranged at this predetermined position. Thereby, the material consumption is reduced and the sealing effect is optimized.

[0012] In addition, the following embodiment is advantageous, in which, during the injection molding encapsulation process, the metal busbar and the sealing mechanism are preheated first by means of an injection molding device. For this purpose, the injection molding device particularly has a heating device. It is advantageous to do so because the metal busbar and the sealing mechanism have reached the optimal temperature during the injection molding encapsulation process, and in this way, the fixing effect of the sealing mechanism is also improved.

[0013] According to another advantageous variant of the present invention, before the arrangement, marks for the predetermined position of the sealing mechanism on the metal busbar are created on the metal busbar by means of a marking device. In addition, when arranging according to the marks, it is advantageous to arrange the sealing mechanism so that it is simpler to arrange the sealing mechanism at the predetermined position.

[0014] In another preferred embodiment of the method, the sealing mechanism is arranged at the predetermined position of the metal busbar by means of an operating device or manually. Especially when using an operating device, the method can be automated thereby.

[0015] In an embodiment variant of the method according to the present invention, the metal busbar is cleaned by means of a cleaning device before the arrangement. It is advantageous to do so because the sealing effect and the adhesion of the sealing mechanism at the predetermined position are optimized.

[0016] In addition, it is advantageous that after the injection molding encapsulation, a leak test is carried out by means of a corresponding test device. In this way, it can be ensured that the sealed busbar achieves the expected sealing effect.

[0017] In an advantageous embodiment variant, the metal busbar is made of copper or aluminum and / or an alloy of copper or aluminum. In a further advantageous variant of the present invention, it is provided that the plastic injection-molded encapsulation part is made of polyolefin, polyvinylidene fluoride, fluororubber, polyvinyl chloride, polyamide (PA), polybutylene terephthalate (PBT), liquid crystal polymer (LCP), polyphthalamide (PPA), polyphenylene sulfide (PPS) and / or polytetrafluoroethylene. These materials are particularly suitable for sealing the busbar or have complementary positive properties in terms of the sealing effect.

[0018] According to the present invention, there is further provided a sealed busbar which is manufactured according to the method as disclosed above. The sealed busbar has a sealing mechanism and a plastic injection-molded encapsulation part. The sealing mechanism is arranged at a predetermined position of the metal busbar, and the plastic injection-molded encapsulation part is arranged around the area of the sealing mechanism, at least completely injection-molding and encapsulating the sealing mechanism.

[0019] As long as it is technically feasible and there is no contradiction, the features disclosed above can be combined as needed.

[0020] Other advantageous further aspects of the present invention are described in the dependent claims or are described in detail below together with the description of the preferred embodiments of the present invention with reference to the drawings. Among them:

[0021] Figure 1 A cross-sectional view showing the sealed busbar, and

[0022] Figure 2 A schematic diagram showing the manufacturing method of the sealed busbar.

[0023] The drawings are schematic examples. The same reference numerals in the figures represent the same functions and / or structural features.

[0024] Figure 1 A sealed busbar 10 is shown, wherein a sealing mechanism 3 is arranged at a predetermined position P of the metal busbar 1, and a plastic injection-molded encapsulation part 2 is provided around the area of the sealing mechanism 3, completely injection-molding and encapsulating the sealing mechanism 3. The metal busbar 1 has a plurality of busbar joints 1a, 1b, 1c, 1d. In addition, the metal busbar 1 is made of copper or aluminum and / or an alloy of copper or aluminum. In addition, the sealing mechanism 3 is a double-walled heat-shrinkable tube, and a coating of hot melt adhesive is arranged on its inner surface. In addition, the outer surface of the heat-shrinkable tube also has a coating of adhesive. In addition, the sealing mechanism 3 is in close contact with the metal busbar 1 in a sealed manner. In addition, a mark 6 for the predetermined position P of the sealing mechanism 3 on the metal busbar 1 is also constructed on the metal busbar 1. In addition, the plastic injection-molded encapsulation part 2 is made of polyolefin, polyvinylidene fluoride, fluororubber, polyvinyl chloride and / or polytetrafluoroethylene.

[0025] Figure 1The sealed busbar 10 shown is manufactured by the manufacturing method described below, and its schematic diagram is as shown in Figure 2 the figure.

[0026] The manufacturing method of the sealed busbar 10 includes first providing a metal busbar 1 having a plurality of busbar joints 1a, 1b, 1c, 1d (step a). Subsequently, one or more separate sealing mechanisms 3 are arranged at a predetermined position P of the metal busbar 1 (step b). After the arrangement, the metal busbar 1 is immediately injection-molded and encapsulated with a plastic injection-molded encapsulation part 2 around the area of the sealing mechanism 3 by an injection molding device, and at least the sealing mechanism 3 is completely injection-molded and encapsulated (step c).

[0027] Here, the sealing mechanism 3 is a double-walled heat-shrinkable tube, and a coating of hot melt adhesive is arranged on the inner surface of the heat-shrinkable tube. In addition, during the injection molding and encapsulation process, the heat-shrinkable tube is heated by the heat energy of the plastic injection-molded encapsulation part 2, particularly by the melt of the plastic injection-molded encapsulation part 2, so that the heat-shrinkable tube shrinks until it is tightly sealed against the metal busbar 1. Optionally, during the injection molding and encapsulation process, the metal busbar 1 and the sealing mechanism 3 are preheated by means of a heating device of the injection molding device.

[0028] In addition, in the manufacturing method, before the arrangement, the metal busbar 1 is cleaned by means of a cleaning device (step a0). Subsequently, before the arrangement, a mark 6 for the predetermined position P of the sealing mechanism 3 on the metal busbar 1 is created on the metal busbar 1 by means of a marking device (step a1). Then, when arranging according to the mark 6, the sealing mechanism 3 is arranged. In addition, the sealing mechanism 3 is arranged at the predetermined position P of the metal busbar 1 by means of an operating device.

[0029] In addition, after the injection molding and encapsulation, a leak test is carried out by means of a corresponding test device (step c0).

[0030] The present invention is not limited to the above-mentioned preferred embodiments in terms of its implementation. On the contrary, many variations can be envisaged, and the solutions shown can be used even in substantially different types of implementation schemes.

Claims

1. A method for manufacturing a sealed busbar (10), comprising the following steps: a. Providing a metal busbar (1) having a plurality of busbar joints (1a, 1b, 1c, 1d); b. Arranging one or more individual sealing mechanisms (3) at a predetermined position (P) of the metal busbar (1); Wherein, immediately after the arrangement, the following steps are performed: c. Injection-molding and encapsulating the metal busbar (1) with a plastic injection-molded encapsulation part (2) around the area of the sealing mechanism (3) by means of an injection-molding device, at least completely injection-molding and encapsulating the sealing mechanism (3).

2. The manufacturing method according to claim 1, wherein, The sealing mechanism (3) is a heat-shrinkable tube, wherein, during the injection-molding encapsulation process, the heat-shrinkable tube is heated by the heat energy of the plastic injection-molded encapsulation part (2), particularly by the melt of the plastic injection-molded encapsulation part (2), so that the heat-shrinkable tube shrinks until it is tightly sealed against the metal busbar (1).

3. The manufacturing method according to claim 2, wherein, The heat-shrinkable tube is a double-walled heat-shrinkable tube, and a coating of hot-melt adhesive is arranged on the inner surface of the heat-shrinkable tube.

4. The manufacturing method according to claim 2 or 3, wherein The heat-shrinkable tube is cut by means of a cutting device (10) before being arranged according to the predetermined position (P) of the metal busbar (1).

5. The manufacturing method according to any one of the preceding claims, wherein, During the injection-molding encapsulation process, the metal busbar (1) and the sealing mechanism (3) are preheated first by means of the injection-molding device.

6. The manufacturing method according to any one of the preceding claims, wherein, Before the arrangement, a mark (6) for the predetermined position (P) of the sealing mechanism (3) on the metal busbar (1) is created on the metal busbar (1) by means of a marking device, and during the arrangement process, the sealing mechanism (3) is arranged according to the mark (6).

7. The manufacturing method according to any one of the preceding claims, wherein, The sealing mechanism (3) is arranged at the predetermined position (P) of the metal busbar (1) by means of an operating device or manually.

8. The manufacturing method according to any one of the preceding claims, wherein, The metal busbar (1) is cleaned by means of a cleaning device before the arrangement.

9. The manufacturing method according to any one of the preceding claims, wherein, After the injection-molding encapsulation, a leak test is performed by means of a corresponding test device.

10. The manufacturing method according to any one of the preceding claims, wherein, The metal busbar (1) is made of copper or aluminum and / or an alloy of copper or aluminum.

11. The manufacturing method according to any one of the preceding claims, wherein, The plastic injection-molded encapsulation part (2) is made of polyolefin, polyvinylidene fluoride, fluororubber, polyvinyl chloride, polyamide, polybutylene terephthalate, liquid crystal polymer, polyphthalamide, polyphenylene sulfide and / or polytetrafluoroethylene.

12. A sealed busbar (10) manufactured by the method according to any one of the preceding claims, wherein, A sealing mechanism (3) is arranged at a predetermined position (P) of the metal busbar (1), and a plastic injection-molded encapsulation part (2) is provided around the area of the sealing mechanism (3), at least completely injection-molding and encapsulating the sealing mechanism (3).

Images