JPH01151156A - Slice terminal of cell - Google Patents

Abstract

PURPOSE:To reduce the defective welding to a cell by making flat sections located on both ends of a terminal the specific same length when the slice terminal with a rib shape is cut vertically to the longitudinal direction. CONSTITUTION:In the A-A' cross section shape of the rib section of a slice terminal 2 welded end attached to a cell, flat sections on both ends are made equal in length and set to 50-20% of the whole slice terminal width. The stability is improved when the slice terminal 2 is pressed to a cell 3 according to this constitution, the terminal is closely stuck to the cell, and the defective welding can be eliminated.

Description

[Detailed description of the invention] Industrial applications The present invention relates to improvements in battery segment terminals.

Conventional technology Conventionally, when welding a segment terminal to a battery, the shape of the rib section is such that when the rib section is cut at right angles to the longitudinal direction, the length of the flat portions located at both ends of the segment terminal is approximately 5 times the width of the entire segment terminal width. It belonged to

Problems to be Solved by the Invention In such a conventional shape, the flat portions 21 at both ends of the rib.
Due to the short length of the press mold, both ends tend to lift up as shown in FIG. If this happens, if you use jig 1 to hold the segment terminal 2 onto the battery 3 for welding as shown in Figure 1, it will be unstable and there will be a gap between the battery 3 and the segment terminal 20, which will prevent it from attaching completely when welding. There was a problem.

The object of the present invention is to improve stability when pressing a segmented terminal against a battery before welding, thereby reducing welding defects.

Means for Solving the Problems In order to solve these problems, the present invention provides flat portions located at both ends of the section terminal in a cross section when the shape of the rib portion is cut at right angles to the longitudinal direction of the section terminal. According to this shape, when the section terminal is placed on the battery before welding, the section terminal is Since the terminal is stable and there is no gap between the terminal and the battery, welding defects can be reduced.

Example Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Figure 2a shows a sectioned terminal according to an embodiment of the present invention, @4 mm length 24#JF, and the cross-sectional shape of the rig part is such that the length of the flat part at both ends of the sectioned terminal is 0 mm and 5 mm on the left and right sides, respectively, so that the section terminal width is It should be 25% of the total (4 drunkenness). Figure 2 shows a sectioned terminal having a width of 4 mm and a length of 24 mm, with the lengths of the flat portions on both sides of the sectioned terminal being 0.1 mm on each side and 5% of the entire width of the sectioned terminal. Figure 2C shows a similar section terminal with a width of 4 cm and a length of 24 mm, with the length of the flat portions at both ends of the section terminal being 1.2 mm on each side and 6% of the entire width of the section terminal. . Also, Figure 2 d has a width of 4f.
This is a cut terminal with a length of 24 mackerel, and the lengths of the flat parts at both ends of the cut terminal are 1.0 mm on the left and 0.2 mm on the right.

Table 1 shows the results of spot welding 1000 pieces of each of these four types of terminals onto batteries and checking the number of welding defects.

Table 1 As can be seen from these results, if the length of the flat part of the rib part is less than 20% of the entire width of the segment terminal, the shape of the segment terminal will be unstable as shown in Figure 1, and both ends of the rig will be raised. A build-up is formed, which makes the disconnected terminal unstable when it is pressed against the battery, causing welding defects. On the other hand, if the length of the flat parts at both ends of the rib is more than 50% of the entire width of the segment terminal, as shown in Figure 3, the flat part of the part that comes into contact with the battery will be reduced, causing the battery to tilt and form the segment terminal. Gaps often form between batteries, causing welding defects. Also, if the flat parts at both ends of the rib are of different lengths on the left and right sides, as shown in Figure 4, the forces applied to the left and right sides will be different, resulting in poor contact between the section terminal and the battery, leaving a gap when welding. A defect has occurred.

Effects of the Invention As described above, according to the present invention, as shown in FIG. 5, when the piece terminal is pressed against the battery, stability is good, and since the terminal is in close contact with the battery, it is possible to eliminate welding defects.

[Brief explanation of the drawing]

FIG. 1a shows a conventionally shaped segmented terminal, FIG. The figure shows a sectioned terminal with a length of the flat part at both ends of the terminal that is 6% of the width of the sectioned terminal.
In Figure C, the length of the flat part at both ends of the segmented terminal is 60% of the width of the segmented terminal.
%. Figure 2 d shows a slice terminal with different lengths of the flat parts at both ends. Figure 3 shows the slice terminal shown in Figure 2 C pressed onto a battery using a jig. FIG. 4 shows the cut terminal of FIG. 2 d being pressed onto a battery with a jig, and FIG. 5 shows the cut terminal of the present invention being pressed onto a battery with a jig. 1... Jig, 2... Section terminal, 3...
·battery. Fig. 1 y- 2-'f: I) l, NI child α A-A' cutting weight = no b 3- 劃 2 - 11111 Fig. 2 C, d /- Jig 2 -Z7] Kata prostitute Figure 4

Claims (1)

[Claims] If the segment terminal welded to the battery has a rib-like shape and is cut at right angles to the longitudinal direction of the segment terminal,
A battery segment terminal, wherein the length of the flat portions located at both ends of the segment terminal is 50 to 20% of the entire width of the segment terminal, and the length is the same on both sides.