Power battery integrated busbar signal acquisition branch connection structure

Abstract

The utility model discloses a power battery integrated busbar signal acquisition branch connection structure, which comprises an FFC body and a signal acquisition branch, the signal acquisition branch is provided with a copper foil bonding pad, the signal acquisition branch is welded with the FFC body through the copper foil bonding pad, and the copper foil bonding pad on the signal acquisition branch is provided with a slit. According to the power battery integrated busbar signal acquisition branch connection structure provided by the utility model, the bonding pad of the signal acquisition branch adopts a laser cutting slotting process, so that the processing is simple, and the waste discharge difficulty in welding is eliminated; when the slotted signal acquisition branch and the FFC body are subjected to thermocompression welding, heat loss in the welding process can be prevented, the welding time is shortened, and the welding efficiency is improved. Tin is separated out from the slit after welding, the tin overflow amount is detected through a common CCD, the welding strength is judged, and the product quality is easier to monitor.

Description

Technical Field

[0001] The utility model relates to the field of vehicle integrated busbars, in particular to a power battery integrated busbar signal acquisition branch connection structure. Background Art

[0002] The signal acquisition branch of the FFC integrated busbar (CCS) is usually connected to the FFC body by laser soldering. The signal acquisition branch is made of copper foil and PI film through laser cutting, die cutting, hot pressing and other processes. The traditional signal acquisition branch has the following disadvantages:

[0003] 1. The traditional signal acquisition branch and the FFC body are connected by laser soldering process to facilitate tin melting. Figure 1 , 2 As shown, microholes are opened at the welding place of the signal acquisition branch, and the acquisition branch is processed by laser. The waste in the microholes cannot be discharged smoothly, making the processing difficult.

[0004] 2. After the traditional signal acquisition branch is welded to the FFC body, the welding quality can only be inspected by AOI. Since the signal acquisition sheet is thin, it is difficult to inspect the welding effect.

[0005] 3. The traditional signal acquisition branch welding piece is large, the heat transfer area is large, the welding heat loss is large, and the welding time is long. Utility Model Content

[0006] The purpose of the utility model is to provide a power battery integrated busbar signal acquisition branch connection structure, reduce the processing difficulty of the signal acquisition branch, shorten the welding time, solve the problem of detection difficulties, so as to improve product yield and efficiency.

[0007] The technical solution of the utility model is:

[0008] The power battery integrated busbar signal acquisition branch connection structure includes an FFC body and a signal acquisition branch, wherein the signal acquisition branch is provided with a copper foil pad, the signal acquisition branch is welded to the FFC body through the copper foil pad, and a slit is provided on the copper foil pad on the signal acquisition branch.

[0009] Preferably, the copper foil pad is in the shape of an elongated strip.

[0010] Preferably, the copper foil pad is in the shape of multiple long strips, and each of the long strips is provided with a slit.

[0011] Preferably, the slit is cut along the length direction of the copper foil pad.

[0012] Preferably, the slit is a single continuous slit or a plurality of intermittent slits.

[0013] Preferably, the slits are cut along the width direction of the copper foil pad, and there are multiple slits arranged along the length direction of the copper foil pad.

[0014] Preferably, the slits on the copper foil pad are laser cut slits.

[0015] Preferably, the copper foil pads on the signal acquisition branch are arranged in multiple rows, and each row of copper foil pads is welded one-to-one with multiple wires on the FFC body.

[0016] Preferably, the welding of the copper foil pad on the signal acquisition branch and the FFC body is thermocompression welding.

[0017] Preferably, it further includes a CCD detection system for detecting the amount of solder deposited at the slits after the copper foil pad is welded to the FFC body to judge the welding strength.

[0018] The advantages of the present utility model are as follows:

[0019] 1. For the signal acquisition branch connection structure of the power battery integrated busbar proposed by the present utility model, the pads of the signal acquisition branch adopt the laser cutting slit process, which is simple in processing and eliminates the waste discharge difficulty during welding.

[0020] 2. When the signal acquisition branch after slitting is thermocompression welded to the FFC body in the present utility model, heat loss during the welding process can be prevented, the welding time can be shortened, and the welding efficiency can be improved.

[0021] 3. After welding in the present utility model, solder precipitates from the slits, and the overflowing solder amount is detected by a common CCD to judge the welding strength, making it easier to monitor the product quality. Description of the Drawings

[0022] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0023] Figure 1 is a schematic structural diagram of the existing signal acquisition branch;

[0024] Figure 2 is a schematic diagram of the welding of the existing signal acquisition branch and the FFC body;

[0025] Figure 3 is a schematic structural diagram of the signal acquisition branch of the present utility model;

[0026] Figure 4 is a schematic diagram of the welding of the signal acquisition branch of the present utility model and the FFC body.

[0027] Figure 5 is the first schematic structural diagram of the pad of the present utility model;

[0028] Figure 6It is the second structural schematic diagram of the pad of the present utility model;

[0029] Figure 7 It is the third structural schematic diagram of the pad of the present utility model;

[0030] Figure 8 It is the fourth structural schematic diagram of the pad of the present utility model. Specific embodiments

[0031] As Figure 3 、 4 shown, the integrated busbar signal acquisition branch connection structure of the power battery of the present utility model includes an FFC body 4 and a signal acquisition branch 1. The signal acquisition branch 1 is provided with copper foil pads 2. The signal acquisition branch 1 is welded to multiple wires of the FFC body 1 through multiple rows of copper foil pads 2. A slit 3 is provided on the copper foil pad on the signal acquisition branch.

[0032] Specifically, as Figure 5 shown, the copper foil pad 2 is strip-shaped, and the slit 3 is cut along the length direction of the copper foil pad 2. Figure 3 、 4 also adopt this cutting method. The slit 3 is a laser slit. The process of laser cutting the slit is simple in processing and easy to clean up waste.

[0033] The copper foil pad and the slit can also be arranged as Figures 6 - 8 shown.

[0034] As Figure 6 shown, the copper foil pad can be multiple strip-shaped segments, and each strip-shaped segment is provided with a slit. Figure 6 Two strip-shaped segments are arranged in

[0035] As Figure 7 shown, the slit on the copper foil pad is multiple intermittent slits.

[0036] As Figure 8 shown, the slit is cut along the width direction of the copper foil pad, and there are multiple slits. The multiple slits are evenly arranged along the length direction of the copper foil pad.

[0037] During specific operation, the welding of the copper foil pad 2 on the signal acquisition branch 1 to the FFC body 4 is thermocompression welding. When the signal acquisition branch after slitting is thermocompression welded to the FFC body, it can prevent heat loss during the welding process, shorten the welding time, and improve the welding efficiency.

[0038] After welding is completed, a CCD detection system is used to detect the amount of solder deposited at the slit 3 of the copper foil pad to judge the welding strength, so as to meet the requirements of quality and efficiency.

[0039] The above embodiments are only used to illustrate the technical concept and features of the present utility model. The purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it accordingly, and it should not be used to limit the protection scope of the present utility model. All modifications made according to the spirit and essence of the main technical solution of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A power battery integrated busbar signal acquisition branch connection structure, comprising an FFC body and a signal acquisition branch, wherein the signal acquisition branch has a copper foil pad, and the signal acquisition branch is welded to the FFC body through the copper foil pad, characterized in that: The copper foil pad on the signal collection branch is provided with a slit.

2. The power battery integrated busbar signal acquisition branch connection structure according to claim 1, characterized in that: The copper foil pad is in the shape of a long strip.

3. The power battery integrated busbar signal acquisition branch connection structure according to claim 2 is characterized in that: The copper foil pad is in the shape of multiple long strips, and each of the long strips is provided with a slit.

4. The power battery integrated busbar signal acquisition branch connection structure according to claim 2, characterized in that: The slit is cut along the length direction of the copper foil pad.

5. The power battery integrated busbar signal acquisition branch connection structure according to claim 4, characterized in that: The slit is a single continuous slit or a plurality of intermittent slits.

6. The power battery integrated busbar signal acquisition branch connection structure according to claim 2, characterized in that: The slits are cut along the width direction of the copper foil pad, and there are multiple slits, which are arranged along the length direction of the copper foil pad.

7. The power battery integrated busbar signal acquisition branch connection structure according to claim 1, characterized in that: The slits on the copper foil pad are laser cut.

8. The power battery integrated busbar signal acquisition branch connection structure according to claim 1, characterized in that: The copper foil pads on the signal collection branch are arranged in multiple rows, and each row of copper foil pads is welded one-to-one with multiple wires on the FFC body.

9. The power battery integrated busbar signal acquisition branch connection structure according to claim 8, characterized in that: The copper foil pad on the signal collection branch and the FFC body are welded by hot pressing.

10. The power battery integrated busbar signal acquisition branch connection structure according to claim 9, characterized in that: It also includes a CCD detection system for detecting the amount of solder precipitated at the seam after the copper foil pad is welded to the FFC body, and judging the welding strength.

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