CN204348801U - A kind of connecting sheet components of automatic spot tool - Google Patents

Abstract

The utility model discloses a kind of connecting sheet components of automatic spot tool, it is characterized in that, comprise at least 2 braces, in at least 2 braces, the brace of half quantity is located on the first tool baffle plate, the brace of second half quantity is located on the second tool baffle plate, first tool baffle plate and the second tool baffle plate are located at the both sides of the tool formed by tool upper cover plate and jig base plate respectively, on first tool baffle plate, the trend of the splitter box of brace is all in same direction, and on the second tool baffle plate, the trend of the splitter box of brace is all in same direction.The utility model can meet the requirement of main flow stitch welding machine automatic spot, there will not be again the situation that brace stitch welding, soldering high temperature wire are much mixed and disorderly, reduces the use of higher temperature line, and product is more succinct, and efficiency is high.Avoid simultaneously and carry out soldering in battery core end, reduce the impact on battery performance and useful life, simplify production technology, accomplish that comprehensive materials are economized most.

Description

Connecting sheet assembly of automatic spot welding fixture

technical field

The utility model relates to a connecting sheet assembly of an automatic spot welding jig, which belongs to the technical field of spot welding of lithium battery packs.

Background technique

The current situation of spot welding assembly of 18650 lithium battery packs: ①The connecting pieces are mostly strips with regular shapes. Although it saves materials, it is difficult to meet the requirements of automatic spot welding of mainstream automatic spot welding machines; In order to meet the requirements of the single-cell battery detection function, the connecting piece is laminated and welded in multiple layers, which affects the life of the battery pack; ③The spot welding connection between the connecting piece and the battery end is mostly manual spot welding, which is inefficient and difficult to ensure consistent welding quality ④ In order to realize the connection between the lithium battery management system and the positive and negative electrodes of the battery pack and meet the requirements of the lithium battery management system to realize the detection function of a single battery cell, there are too many soldering wires and the production process is complicated.

Contents of the invention

The technical problem to be solved by the utility model is: to provide a connecting piece assembly of an automatic spot welding fixture with low material consumption, long service life, simple production process and high efficiency, which solves the problem that the existing connecting pieces are difficult to meet the mainstream automatic Requirements for automatic spot welding of spot welding machines; multi-layer stack welding, which affects the life of the battery pack; low efficiency; too many soldering wires and complicated production processes.

In order to solve the above technical problems, the technical solution of the utility model is to provide a connecting piece assembly of an automatic spot welding fixture, which is characterized in that it includes at least 2 connecting pieces, and half of the connecting pieces in the at least 2 connecting pieces are set On the first jig baffle, the other half of the connecting pieces are set on the second jig baffle, and the first jig baffle and the second jig baffle are respectively set on the jig upper cover and the jig On both sides of the jig formed by the base plate, the flow distribution grooves of the connecting piece on the first jig baffle are all in the same direction, and the flow distribution grooves of the connecting piece on the second jig baffle are all in the same direction.

Preferably, pins are provided on the connecting pieces.

Preferably, notches are formed on both sides of the pins of all the connecting pieces that do not need to be directly matched with the PCB board, and small round holes are opened at the ends of the pins.

Preferably, at least 2 bends are provided on all the pins of the connecting piece that directly cooperate with the PCB board.

Preferably, the pins of the connecting sheet pass through corresponding holes on the PCB.

Preferably, each connecting piece is provided with a shunt groove and 4 convex hulls at a corresponding position corresponding to each battery end, the 4 convex hulls are arranged in a matrix, and 2 convex hulls are symmetrically distributed on both sides of the shunt groove.

Preferably, the center point of the line connecting the diagonal convex hulls of each of the four convex hulls coincides with the center of the battery end.

The utility model can not only meet the requirements of automatic spot welding of mainstream automatic spot welding machines, but also avoid many messy situations of overlapping welding of connecting pieces and soldering of high-temperature wires, reduce the use of high-temperature wires, and make the product more concise and efficient. At the same time, it avoids soldering at the end of the battery cell, reduces the impact on the performance and service life of the battery pack, simplifies the production process, and achieves the most economical comprehensive materials.

Description of drawings

Figure 1 is a connection mode of a typical battery pack arranged in a font of 3 strings;

Fig. 2 is the back view of Fig. 1;

Fig. 3 is an effect diagram after blurring the battery in Fig. 1;

Fig. 4 is an effect diagram of the virtualized battery in Fig. 2;

Fig. 5 is the structural schematic diagram of the 3rd connecting sheet;

Fig. 6 is a structural schematic diagram of the second connecting piece;

Figure 7 is a side view of Figure 6;

Figure 8 shows how the pins and the PCB board cooperate after the connecting piece is bent;

Fig. 9 is a schematic structural view of the second jig baffle;

Fig. 10 is a schematic structural view of the first jig baffle;

Fig. 11 is a schematic structural view of the upper cover plate of the jig and the base plate of the jig combined;

Figure 12 is a rear view of Figure 11;

Figure 13 is a rear view of Figure 9;

Figure 14 is a rear view of Figure 10;

Fig. 15 is a schematic structural view of the jig.

Among them: 1 is the first connecting piece; 2 is the second connecting piece; 3 is the first battery; 4 is the third connecting piece; 5 is the second battery; 6 is the fourth connecting piece; 7 is the third battery; 8- 1 is the first small round hole; 8-2 is the second small round hole; 9-1 is the first pin; 9-2 is the second pin; 9-3 is the third pin; 9-4 is the first pin Four pins; 10-1 is the first gap; 10-2 is the second gap; 11 is bending; 12 is the PCB board; 13 is the first fixture baffle, 14 is the second fixture baffle, 15 is Fixture upper cover plate, 16 is the fixture base plate, 17-1 is the first distribution channel, 17-2 is the second distribution channel, 17-3 is the third distribution channel, 17-4 is the fourth distribution channel, 18 is the convex hull.

Detailed ways

In order to make the utility model more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

Example 1

The utility model relates to a connecting piece of an automatic spot welding jig, which is tailored according to different battery pack structures, battery arrangements, series-parallel connection forms, etc., through pertinent design. The connecting sheet assembly can meet the requirements of automatic spot welding of mainstream automatic spot welding machines, and there will be no messy situations of overlapping welding of connecting sheets and soldering of high-temperature wires, which simplifies the production process and saves the most comprehensive materials at the same time.

Each connection piece has a shunt groove and 4 convex hulls 18 at the corresponding position corresponding to each battery end, and the 4 convex hulls 18 are arranged in a matrix, and 2 convex hulls 18 are symmetrically distributed on both sides of the shunt groove; 4 The center point of the line connecting the diagonal convex hulls 18 in the convex hull 18 coincides with the center of the circle at the end of the 18650 lithium battery, so as to ensure that the convex hull 18 will not be partially welded.

When performing spot welding on the battery pack, the direction of the shunt grooves of all the connecting pieces on the same side of the battery pack is in the same direction; the direction of the shunt grooves on both sides of the battery pack can be in the same direction or perpendicular to each other. The trend of the slots can also be at any angle, which is convenient for automatic spot welding, and the battery pack can be formed by spot welding automatically at one time; as long as the shunt grooves of the connecting pieces on the same side of the battery pack are in the same direction, the battery pack can be automatically spot welded and formed at one time.

Each connecting piece has a lead out, which avoids soldering at the end of the battery while ensuring that there will be no overlapping of nickel sheets, reducing the impact on the performance and service life of the battery pack.

Notches are designed on both sides of the position where the connecting piece pin needs to be bent, and there is a small round hole at the end of the connecting piece pin for soldering high-temperature wires. In terms of technology, first solder the high-temperature wire at the small round hole at the end of the connecting piece, and then bend it along the notch on the pin. Because if soldering is performed after bending, it is not easy to operate, and it is easy to burn the PVC coating on the surface of the 18650 battery.

After 2-3 bends, the pins of the connecting piece that need to cooperate with the PCB board 12 are directly passed through the corresponding holes on the PCB board 12 and soldered to the PCB board 12, reducing the use of high-temperature wires, simplifying the process, and improving the product quality. more concise.

The utility model is suitable for mainstream automatic spot welding machines. The mainstream automatic spot welding machine, that is, the automatic spot welding machine has two welding power sources, and each welding power source is connected to two welding rods, which are symmetrically distributed and located on both sides of the end of the 18650 lithium battery; during spot welding, the welding rods on both sides Simultaneous discharge, the two welding rods on the same side are symmetrically distributed with the center line of the shunt groove of the connecting piece as the axis of symmetry; the cross section of the welding rod is rectangular, and one welding rod simultaneously spot welds the two convex hulls 21 on the same side of the shunt groove.

Due to the wide variety of battery pack structures, battery arrangements, and series-parallel connections, a typical connection method of a battery pack arranged in a 3-series shape is used as an example (as shown in Figure 1-Figure 4), and the details are described in detail. The specific embodiment of the utility model. 3 Connecting pieces of a set of automatic spot welding fixtures for battery packs arranged in a font, including connecting pieces of four specifications: the first connecting piece 1, the second connecting piece 2, the third connecting piece 4, and the fourth connecting piece 6.

3 battery cells arranged in a font are placed in the automatic spot welding jig, and the connecting pieces of four specifications are respectively fixed on the two side baffles of the automatic spot welding jig (that is, the first jig baffle 13, the second jig baffle 14), that is, the first connecting piece 1 and the third connecting piece 4 are fixed on the first jig baffle 13, and the second connecting piece 2 and the fourth connecting piece 6 are fixed on the second jig baffle 14 , and then close the bezel. After the baffle is closed, the shunt slots of all the connecting pieces (that is, the first shunt slot 17, the second shunt slot 18, the third shunt slot 19, and the fourth shunt slot 20) are in the same direction, and each 18650 battery cell There are four convex hulls 21 corresponding to the ends, and the midpoint of the diagonal line of the convex hulls 21 of each connecting piece is on the centerline of the cylindrical surface of the 18650 cell.

As shown in Figures 3-7, one end of the first connecting piece 1 has a first pin 9-1, and the head of the first pin 9-1 has a first small round hole 8-1, and the first pin There is a first gap 10-1 on both sides of 9-1, and there is a first splitter groove 17-1 in the middle of the other end of the first connecting piece 1, and there are four evenly distributed on both sides of the first splitter groove 17-1. convex hull18.

The shape of the second connecting piece 2 is "Z" shape, and a second splitter groove 17-2 is opened at both ends of the second connecting piece 2, and there are four evenly distributed on both sides of each second splitter groove 17-2. The convex shell 18 has a second pin 9-2 on the inner side of one end of the second connecting piece 2 .

The shape of the third connecting piece 4 is earth-shaped, the top of the third connecting piece 4 has a third pin 9-3, both sides of the third pin 9-3 have a second gap 10-2, the third The head of pin 9-3 has second small round hole 8-2, and the bottom both sides of the 3rd connecting piece 4 all has a 3rd shunt groove 17-3, and the two sides of every 3rd shunt groove 17-3 Four convex hulls 18 are evenly distributed on the side.

The planar shape of the fourth connection piece 6 is rectangular, with a fourth pin 9-4 at one end, and a fourth shunt groove 17-4 at the other end, and four protrusions are evenly distributed on both sides of the fourth shunt groove 17-4. pack 18.

Put the automatic spot welding jig with the battery core and the connecting piece into the automatic spot welding machine, adjust the two welding rods at both ends to ensure that the welding rods on the same side are symmetrically distributed on both sides of the center line of the shunt slot of the corresponding connecting piece, At the same time, ensure that the two welding rods at both ends are symmetrically distributed, and each welding rod can completely cover the two convex hulls 21 on the same side of the shunt. Turn on the spot welding switch to form a fast automatic spot welding, which not only improves the welding efficiency, but also ensures the consistency of welding quality.

As shown in Figure 8, the spot-welded battery pack is on the pins (the second pin 9-2 and the fourth pin 9-2 and the fourth pin 6) of the two connecting pieces (the second connecting piece 2 and the fourth connecting piece 6) near the PCB board 12. The pins 9-4) have three bends, and the ends of the pins are directly inserted into the holes on the PCB board 12 to cooperate with the PCB board 12 for soldering connection, which not only reduces the use of high-temperature wires, saves production costs, but also simplifies production process, and at the same time, the three bends of the nickel sheet pin play a role in positioning and supporting the PCB board 12 .

The spot-welded battery pack is on the pins (the first pin 9-1 and the third pin 9-3) of the two connecting pieces (the first connecting piece 1 and the third connecting piece 4) away from the PCB board 12 The round holes at the end (the first small round hole 8-1 and the second small round hole 8-2) are first soldered with high-temperature wires, and then folded along the gap (the first gap 10-1 and the second gap 10-2). Bend to stick to the cylindrical surface of the 18650 battery cell, and the other end of the high-temperature wire is connected to the PCB board 12 for soldering.

Above-mentioned embodiment just describes preferred embodiment of the present utility model, is not the limitation of the conception and scope of the present utility model, under the premise of not departing from the design concept of the present utility model, engineering technicians in the field make the technical solution of the utility model Various deformations and improvements should belong to the protection scope of the present utility model.

Claims (7)

1. the connecting sheet components of an automatic spot tool, it is characterized in that, comprise at least 2 braces, in at least 2 braces, the brace of half quantity is located on the first tool baffle plate (13), the brace of second half quantity is located on the second tool baffle plate (14), first tool baffle plate (13) and the second tool baffle plate (14) are located at the both sides of the tool formed by tool upper cover plate (15) and jig base plate (16) respectively, the trend of the splitter box of the upper brace of the first tool baffle plate (13) is all in same direction, the trend of the splitter box of the upper brace of the second tool baffle plate (14) is all in same direction.

2. the connecting sheet components of a kind of automatic spot tool as claimed in claim 1, is characterized in that, described brace is equipped with pin.

3. the connecting sheet components of a kind of automatic spot tool as claimed in claim 1, is characterized in that, all pin both sides of the described brace directly coordinated with pcb board (12) that do not need all have gap, and the end of pin has small sircle hole.

4. the connecting sheet components of a kind of automatic spot tool as claimed in claim 1, is characterized in that, the pin of all described braces directly coordinated with pcb board is provided with at least 2 road bendings (11).

5. the connecting sheet components of a kind of automatic spot tool as claimed in claim 4, is characterized in that, the pin of described brace is through the upper corresponding hole of pcb board (12).

6. the connecting sheet components of a kind of automatic spot tool as claimed in claim 1, it is characterized in that, each described brace is equipped with splitter box and 4 convex closures (18) in the relevant position of each battery end of correspondence, 4 convex closures (18) become matrix arrangement, each 2 convex closures (18) of splitter box bilateral symmetry distribution.

7. the connecting sheet components of a kind of automatic spot tool as claimed in claim 6, is characterized in that, in each described 4 convex closures (18), the central point of diagonal angle convex closure (18) line overlaps with the center of circle of battery end.