Power battery high-voltage power supply connecting assembly

Abstract

A power battery high-voltage power supply connecting assembly comprises a plurality of wires 1, an ultrasonic welding part 2 fixedly connected with the end parts of the wires 1, and a metal bar 3 fixedly connected with the ultrasonic welding part 2, wherein an insulating rubber sleeve 4 is arranged on the outer side of the ultrasonic welding part 2 and the outer side of the end part of the metal bar 3 connected with the ultrasonic welding part 2. And a powder dipping layer 31 is arranged on the end surface of the middle part of the metal bar 3. One end of the metal bar 3 is fixedly connected with the ultrasonic welding part 2, and the other end of the metal bar 3 is provided with a metal bar lock hole 32. The two notches 33 are staggered with each other, and the staggered distance is 1-2 mm. Foam 5 is arranged among the multiple metal rows 3 on the same side. The beneficial effects of the utility model lie in that the connecting ends use the metal bars, and the connecting ends at the front and rear sides are connected through the wires, so that the product manufacturing cost is low, and the connection is stable and reliable; and the stress concentrated on the ultrasonic welding part during vibration is eliminated by slotting at the ultrasonic joint.

Description

Technical Field

[0001] The utility model relates to the technical field of parts, and in particular to a power battery high-voltage power supply connection component. Background Art

[0002] In recent years, the automotive industry, especially new energy vehicle technology, has developed rapidly, and the battery packs of new energy vehicles must use power connectors. However, there are many problems in the current power battery high-voltage power supply connection components: 1. The entire connection component uses metal bar materials, and some higher requirements require powder dipping on the metal bar, which leads to high costs; 2. The entire connection component uses wires. Since the wires need to be thicker, and due to space limitations, the wires are difficult to bend for installation in some places. The connection method of cutting terminals and crimping will increase the contact resistance due to vibration, and the connection is unstable.

[0003] Therefore, there is an urgent need to develop a power battery high-voltage power supply connection component with low manufacturing cost and stable and reliable connection. Utility Model Content

[0004] The utility model aims to solve one of the above technical problems at least to a certain extent.

[0005] To this end, the purpose of the utility model is to provide a power battery high-voltage power supply connection assembly, which has low manufacturing cost and stable and reliable connection.

[0006] To achieve the above-mentioned purpose, an embodiment of the utility model discloses a power battery high-voltage power supply connection assembly, comprising a plurality of wires 1, an ultrasonic welding portion 2 fixedly connected to the ends of the wires 1, and a metal bar 3 fixedly connected to the ultrasonic welding portion 2; wherein, an insulating rubber sleeve 4 is provided on the outer side of the ultrasonic welding portion 2 and the end of the metal bar 3 connected thereto.

[0007] In addition, the power battery high voltage power supply connection assembly according to the above technical solution of the utility model may also have the following additional technical features:

[0008] Optionally, a powder coating layer 31 is provided on the middle end surface of the metal bar 3 .

[0009] Optionally, one end of the metal bar 3 is fixedly connected to the ultrasonic welding part 2 , and the other end is provided with a metal bar locking hole 32 .

[0010] Optionally, notches 33 are provided on both sides of one end of the metal bar 3 fixedly connected to the ultrasonic welding part 2 .

[0011] Optionally, the two notches 33 are staggered with respect to each other, and the staggered distance is 1-2 mm.

[0012] Optionally, a plurality of the wires 1 are bundled together by a cable tie.

[0013] Optionally, foam 5 is arranged between the multiple metal rows 3 on the same side.

[0014] Optionally, foam 5 is provided on the outer end surface of the metal bar 3 .

[0015] The beneficial effects of the utility model are: 1. The connection end uses a metal bar, and the connection ends on the front and rear sides are connected by wires, which makes the product manufacturing cost low and the connection is stable and reliable; 2. The insulation of each part is reliable through insulating rubber sleeves, dip powder and instant noodles; 3. The grooves at the ultrasonic connection eliminate the stress concentrated on the ultrasonic welding part during vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a power battery high voltage power supply connection assembly provided by an embodiment of the utility model;

[0017] Figure 2 It is a partially enlarged exploded view I of a power battery high voltage power supply connection assembly provided by another embodiment of the utility model;

[0018] Figure 3 It is a partial enlarged view II of a power battery high-voltage power supply connection assembly provided by another embodiment of the utility model.

[0019] Reference numerals:

[0020] 1-rubber cap body, 2-boss, 3-threading hole, 4-reinforcement rib, 5-round hole boss, 6-wire, 7-connector. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or components / elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0022] The power battery high voltage power supply connection assembly according to an embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0023] Figure 1 This is a structural schematic diagram of a power battery high voltage power supply connection assembly provided by an embodiment of the utility model. Figure 2 FIG1 is a partially enlarged exploded view of a power battery high voltage power supply connection assembly provided by another embodiment of the present utility model. Figure 3FIG2 is a partial enlarged view II of a power battery high voltage power supply connection assembly provided by another embodiment of the present utility model. Figure 1-3 As shown, the power battery high-voltage power supply connection assembly includes a plurality of wires 1, an ultrasonic welding portion 2 fixedly connected to the ends of the wires 1, and a metal bar 3 fixedly connected to the ultrasonic welding portion 2; wherein, an insulating rubber sleeve 4 is provided on the outer side of the ultrasonic welding portion 2 and the end of the metal bar 3 connected thereto.

[0024] Specifically, the design of the present application uses a metal busbar 3 for connection at the end to ensure that the connection is stable and reliable; the wire 1 is used in the middle part as the middle extension connection component to reduce material costs; the insulating rubber sleeve 4 can use a heat shrink tubing. After the ultrasonic welding part 2 and the metal busbar 3 are welded, a hot air blower is used to heat it to shrink and cover the welding position to ensure product insulation; the metal busbar 3 is generally made of copper. Since this product is used at the high-voltage power supply end of the power battery, the use of copper with lower resistance can reduce the heat generation, making the product easier to manage heat. Similarly, silver or other low-resistance materials can also be used; when a copper busbar is selected, a nickel-plated copper busbar can be further selected to prevent the copper busbar from rusting.

[0025] According to the power battery high-voltage power supply connection component of the utility model, the connection end uses a metal bar, and the connection ends on the front and rear sides are connected using wires and wires, so that the product manufacturing cost is low and the connection is stable and reliable.

[0026] According to an embodiment of the present invention, a powder impregnation layer 31 is provided on the middle end surface of the metal bar 3 .

[0027] Specifically, a powder coating layer may be attached to the surface of the metal bus 3 through a powder coating process, so that the surface of the metal bus 3 is insulated.

[0028] According to an embodiment of the present invention, one end of the metal bar 3 is fixedly connected to the ultrasonic welding part 2 , and the other end is provided with a metal bar locking hole 32 .

[0029] Specifically, the metal bar lock hole 32 is used to connect the metal bar (connection component) and the battery pack power supply together using screws. It should be noted that after the metal bar 3 is dipped in powder, it is necessary to remove the powder on the surface to avoid poor contact caused by insulating powder.

[0030] According to an embodiment of the present invention, notches 33 are provided on both sides of one end of the metal bar 3 fixedly connected to the ultrasonic welding part 2 .

[0031] According to an embodiment of the present invention, the two notches 33 are staggered with respect to each other, and the staggered distance is 1-2 mm.

[0032] Specifically, the metal bar and wire are ultrasonically welded and then loaded into the battery pack. The car will vibrate while driving, and tension will be generated between the metal bar and the wire during the vibration (if the size is too long, the tension will be greater). The tension cannot be eliminated and will all be concentrated at the ultrasonic wave. Long-term stress at the ultrasonic welding point will cause insufficient ultrasonic pulling force and break. In order to solve this problem, the metal bar is designed with a groove at the ultrasonic welding point. The stress generated between the metal bar and the wire is concentrated at the groove, reducing the stress at the ultrasonic welding part 2 and improving durability.

[0033] It should be noted that if Figure 3 As shown, in the embodiment provided by the present application, the two grooves are split, and the offset distance D is 1 mm. The specific offset distance D can be 1-2 mm to facilitate stress concentration.

[0034] According to an embodiment of the present invention, a plurality of the wires 1 are bundled together by a cable tie.

[0035] Specifically, the cable tie can conveniently bind the wire 1 inside the battery pack.

[0036] According to an embodiment of the present invention, foam 5 is arranged between the multiple metal rows 3 on the same side.

[0037] According to an embodiment of the present invention, a foam 5 is provided on the outer end surface of the metal bar 3 .

[0038] Specifically, when the connection assembly is provided with multiple sets of wire-metal bars, the metal bars often need to be overlapped due to space limitations, and foam can be used to separate the metal bars 3 in pairs. In addition, since the outer side of the metal bar may be exposed and may cause a short circuit, foam can also be provided at the section of the outer side.

[0039] The above embodiments are preferred implementation schemes of the present application. In addition, the present application may also be implemented in other ways. Any obvious replacement without departing from the concept of the present application is within the protection scope of the present application.

Claims

1. A power battery high voltage power supply connection assembly, characterized in that: include: A plurality of conductive wires (1), an ultrasonic welding portion (2) fixedly connected to the ends of the conductive wires (1), and a metal bar (3) fixedly connected to the ultrasonic welding portion (2); Wherein, an insulating rubber sleeve (4) is provided on the outer side of the ultrasonic welding portion (2) and the end of the metal bar (3) connected thereto.

2. A power battery high voltage power supply connection assembly according to claim 1, characterized in that: A powder impregnation layer (31) is provided on the middle end surface of the metal bar (3).

3. A power battery high voltage power supply connection assembly according to claim 2, characterized in that: One end of the metal bar (3) is fixedly connected to the ultrasonic welding portion (2), and the other end is provided with a metal bar locking hole (32).

4. A power battery high voltage power supply connection assembly according to claim 1, characterized in that: Notches (33) are provided on both sides of one end of the metal bar (3) fixedly connected to the ultrasonic welding portion (2).

5. A power battery high voltage power supply connection assembly according to claim 4, characterized in that: The two notches (33) are staggered with respect to each other, and the staggered distance is 1 to 2 mm.

6. A power battery high voltage power supply connection assembly according to claim 1, characterized in that: A plurality of the wires (1) are bundled together by a cable tie.

7. A power battery high voltage power supply connection assembly according to claim 1, characterized in that: Foam (5) is arranged between the plurality of metal rows (3) on the same side.

8. A power battery high voltage power supply connection assembly according to claim 1, characterized in that: The end surface of the metal bar (3) facing outward is provided with foam (5).

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