A high-temperature resistant composite copper busbar for capacitors of new energy electric vehicles

Abstract

This invention discloses a high-temperature resistant composite copper busbar for capacitors in new energy electric vehicles, comprising an outer plate, an inner plate disposed on the upper surface of the inner wall of the outer plate, and several grooves formed on the lower surface of the outer plate. Several through holes are formed on the upper surface of the inner wall of each groove. The lower surface of the inner wall of the inner plate and the lower surface of the outer plate are welded to both ends of several capacitors. By configuring the outer plate, inner plate, welding section, first fin, second fin, and insulating sheet, this method effectively maintains the uniform temperature rise of the entire area due to temperature changes, facilitating heat dissipation. Furthermore, the area exhibits excellent flowability, greatly ensuring reasonable temperature control at the welding position. In the simultaneous connection of multiple capacitors to the outer and inner plates, the insulating sheet between the inner and outer plates forms a large capacitor, providing stable capacitor integration and better filtering performance.

Description

Technical Field

[0001] This invention relates to the field of automotive parts, and in particular to a high-temperature resistant composite copper busbar for capacitors in new energy electric vehicles. Background Technology

[0002] A busbar structure typically includes a busbar and multiple capacitor cores. The busbar consists of a conductive upper connecting plate and a lower connecting plate, with the capacitor cores electrically connected between the upper and lower connecting plates. The busbar also has several upper lead-out groups and one-side lead-out groups. The upper lead-out groups are used to connect to the IGBT module. Their main function is to absorb the high-amplitude pulsating current requested by the inverter from the "DC-Link," preventing the generation of high-amplitude pulsating voltage across the "DC-Link" impedance. This keeps the inverter's power supply voltage fluctuations within an acceptable range and prevents the impact of voltage overshoot and transient current from the "DC-Link" on the inverter. The side lead-out groups are used to connect to the power supply, primarily connecting to the busbar and transmitting large currents to downstream components.

[0003] In current busbar structures, copper is mostly used. However, in the current structure, copper plates are simply welded to the two ends of the capacitor. The temperature rise is more concentrated at the welding point. If the heat dissipation cannot alleviate the temperature rise, the welding point is easily damaged, resulting in poor contact. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a high-temperature resistant composite copper busbar for new energy electric vehicle capacitors. It uses a simple copper plate welded to both ends of the capacitor. The temperature rise is more concentrated at the welding position. If the heat dissipation cannot alleviate the temperature rise when using the welding method, it is very easy to damage the welding position and cause poor contact.

[0005] To solve the above technical problems, the present invention provides the following technical solution: a high-temperature resistant composite copper busbar for new energy electric vehicle capacitors, comprising an outer plate, the outer plate being configured as an inverted U-shaped plate, an inner plate being provided on the upper surface of the inner wall of the outer plate, a plurality of grooves being provided on the lower surface of the outer plate, a plurality of through holes being provided on the upper surface of the inner wall of the grooves, the lower surface of the inner plate and the lower surface of the inner wall of the outer plate being welded to the two ends of a plurality of capacitors respectively, a plurality of first fins and second fins being provided on the upper surface of the inner wall of the outer plate and the upper surface of the inner plate respectively, and the plurality of first fins and second fins being bonded to the surface of the same insulating sheet.

[0006] As a preferred embodiment of the present invention, a plurality of first fins and second fins are arranged in an alternating manner.

[0007] As a preferred embodiment of the present invention, the outer plate has two first terminals on its surface, and the inner plate has a plurality of second terminals on its surface, both the first terminals and the second terminals being tin-plated.

[0008] As a preferred embodiment of the present invention, the lower surface of the inner wall of the outer plate and the lower surface of the inner plate are provided with a plurality of welding parts, and two corresponding welding parts are located at the two ends of the same capacitor.

[0009] As a preferred embodiment of the present invention, the lower surfaces of both the inner and outer plates are provided with a plurality of heat dissipation holes, and the insulating sheet is made of polyimide film material.

[0010] As a preferred embodiment of the present invention, both the outer plate and the inner plate are made of either T-copper plate or tin-plated brass.

[0011] As a preferred embodiment of the present invention, the surface of the welded part is subjected to either nickel plating or silver plating.

[0012] Compared with the prior art, the beneficial effects that this invention can achieve are:

[0013] By configuring an outer plate, inner plate, welding section, first fin, second fin, and insulating sheet, the two ends of the capacitor are fixed to the welding section during welding. The through-type design of the welding section ensures that the welding anchor points are fully distributed within the welding section during the welding process. Subsequently, when energized, the welding section experiences a temperature rise and then directly contacts the air without any obstruction, maintaining its heat dissipation effect. Simultaneously, the lower part of the outer plate forms a mesh structure with the cooperation of through holes and grooves, which greatly improves its heat dissipation efficiency. Furthermore, under the action of the grooves, the welding section has a space distance from the bottom surface, and the heat dissipation holes connected to the welding section allow the temperature to converge inside, forming a hot chamber. The outer and inner plates are then heated evenly, and heat is dissipated through the alternating arrangement of the first and second fins. Simultaneously, the insulating sheet between the outer and inner plates interrupts the current during temperature conduction. This method effectively maintains the temperature change in the area, resulting in a uniform temperature rise and heat dissipation. Furthermore, the area has excellent flow properties, greatly ensuring reasonable temperature control at the welding position. In the simultaneous connection of multiple capacitors with the outer and inner plates, the insulating sheet between the inner and outer plates forms a large capacitor, providing stable capacitor integration and better filtering performance. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 This is a frontal structural diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of the insulating sheet of the present invention exploding;

[0017] Figure 4 This is a three-dimensional structural diagram of the outer panel of the present invention.

[0018] The components are: 1. Outer plate; 2. Inner plate; 3. Groove; 4. Through hole; 5. Welding part; 6. Capacitor; 7. Heat dissipation hole; 8. Insulating sheet; 9. First terminal; 10. Second terminal; 11. First fin; 12. Second fin. Detailed Implementation

[0019] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified. Example

[0020] like Figure 1-4 As shown, the present invention provides a high-temperature resistant composite copper busbar for capacitors in new energy electric vehicles, comprising an outer plate 1, an inner plate 2 disposed on the upper surface of the inner wall of the outer plate 1, a plurality of grooves 3 formed on the lower surface of the outer plate 1, a plurality of through holes 4 formed on the upper surface of the inner wall of the grooves 3, the lower surface of the inner wall of the inner plate 2 and the lower surface of the outer plate 1 being welded to the two ends of a plurality of capacitors 6, a plurality of first fins 11 and second fins 12 respectively disposed on the upper surface of the inner wall of the outer plate 1 and the upper surface of the inner plate 2, and the plurality of first fins 11 and second fins 12 being bonded to the surface of the same insulating sheet 8.

[0021] During welding, the two ends of capacitor 6 are fixed to the welding part 5. The through-type design of the welding part 5 ensures that the welding anchor points are fully distributed within the welding part 5 during the welding process. Then, when energized, the welding part 5 is heated and directly exposed to the air without any obstruction, maintaining its heat dissipation effect. Simultaneously, the lower part of the outer plate 1 forms a mesh structure with the cooperation of the through hole 4 and the groove 3, which greatly improves its heat dissipation efficiency. Under the action of the groove 3, the welding part 5 has a space between the model layer and the bottom surface. At the same time, the heat dissipation hole 7 connected to the welding part 5 allows the temperature to converge inside to form a hot chamber. Then, the outer plate 1 and the inner plate 2 are uniformly heated as a whole, and the heat is dissipated through the alternating heat dissipation between the first fin 11 and the second fin 12. The outer plate 1 and the inner plate 2 work together synchronously. The insulating sheet 8 between them keeps the current in a blocked state during the temperature conduction process. This method can maintain the temperature change of the area and make the overall temperature rise uniform for heat dissipation. Moreover, the area has good flow and greatly ensures the reasonable control of the temperature at the welding position. In the synchronous connection of multiple capacitors with the outer plate 1 and the inner plate 2, the insulating sheet 8 between the inner plate 2 and the outer plate 1 forms a large capacitor, which not only has stable capacitor integration, but also has a better processing effect for filtering.

[0022] In other embodiments, such as Figure 1 and Figure 2 As shown, the surface of the insulating sheet 8 is bonded to the upper surface of the inner wall of the outer plate 1 and the upper surface of the inner plate 2, respectively. Several first fins 11 and second fins 12 are arranged alternately. Several welding parts 5 are provided on the lower surface of the outer plate 1 and the lower surface of the inner plate 2. Corresponding welding parts 5 are located at both ends of the same capacitor 6. Several heat dissipation holes 7 are provided on the front of the inner plate 2 and the lower part of the front of the outer plate 1. The insulating sheet 8 is made of polyimide film material. Both the outer plate 1 and the inner plate 2 are made of T2 copper plate and tin-plated brass.

[0023] By setting the first fin 11 and the second fin 12, the first fin 11 and the second fin 12 cooperate to form a gap, which achieves a good temperature dissipation effect. At the same time, they support each other and have a good distance maintenance and strength enhancement effect. By setting the welding part 5, the welding part 5 can make full contact during the welding process, which achieves a good welding stability effect and simultaneously has a good heat dissipation effect.

[0024] In other embodiments, such as Figure 3 and Figure 4 As shown, the outer plate 1 has two first terminals 9 on its surface, and the inner plate 2 has several second terminals 10 on its surface. Both the first terminals 9 and the second terminals 10 are tin-plated, and the surface of the solder part 5 is treated with either nickel plating or silver plating.

[0025] By setting the first terminal 9 separately from the second terminal 10, it can be easily installed and fixed. At the same time, the surface is tin-plated to maintain a stable welding effect when heated during the welding process. By setting the welding part 5, the plating at the welding part 5 can improve the conductivity, reduce the resistance at the welding position, and reduce the temperature to a certain extent.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-temperature resistant composite copper busbar for capacitors in new energy electric vehicles, comprising an outer plate (1), wherein the outer plate (1) is configured as an inverted U-shaped plate, characterized in that: The upper surface of the inner wall of the outer plate (1) is provided with an inner plate (2). The lower surface of the outer plate (1) is provided with a number of grooves (3). The upper surface of the inner wall of the grooves (3) is provided with a number of through holes (4). The lower surface of the inner plate (2) and the lower surface of the inner wall of the outer plate (1) are respectively welded to the two ends of a number of capacitors (6). The upper surface of the inner wall of the outer plate (1) and the upper surface of the inner plate (2) are respectively provided with a number of first fins (11) and second fins (12). The number of first fins (11) and second fins (12) are bonded to the surface of the same insulating sheet (8).

2. The high-temperature resistant composite copper busbar for new energy electric vehicle capacitors according to claim 1, characterized in that: Several first fins (11) and second fins (12) are arranged alternately.

3. The high-temperature resistant composite copper busbar for new energy electric vehicle capacitors according to claim 1, characterized in that: The outer plate (1) has two first terminals (9) on its surface, and the inner plate (2) has several second terminals (10) on its surface. Both the first terminals (9) and the second terminals (10) are tin-plated.

4. The high-temperature resistant composite copper busbar for new energy electric vehicle capacitors according to claim 1, characterized in that: The lower surface of the inner wall of the outer plate (1) and the lower surface of the inner plate (2) are provided with several welding parts (5), and two welding parts (5) are located at the two ends of the same capacitor (6).

5. The high-temperature resistant composite copper busbar for new energy electric vehicle capacitors according to claim 1, characterized in that: The lower surfaces of the inner plate (2) and the outer plate (1) are provided with several heat dissipation holes (7), and the insulating sheet (8) is made of polyimide film.

6. The high-temperature resistant composite copper busbar for new energy electric vehicle capacitors according to claim 1, characterized in that: Both the outer plate (1) and the inner plate (2) are made of either T2 copper plate or tin-plated brass.

7. The high-temperature resistant composite copper busbar for new energy electric vehicle capacitors according to claim 4, characterized in that: The surface of the welded part (5) is treated with either nickel plating or silver plating.

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