An integrated device for testing welding and pulling force of cylindrical battery cells

Abstract

The utility model discloses an integrated device for cylindrical battery welding and pull-out force testing, which relates to the technical field of lithium batteries, including a cylindrical battery limiting mechanism, a pole piece limiting mechanism and a limiting and pressing mechanism; the cylindrical battery limiting mechanism can provide bottom support and lateral limiting for the cylindrical battery; the pole piece limiting mechanism can provide limiting for the negative and positive pole pieces to be welded; the limiting and pressing mechanism has a first station and a second station, the first station can press the negative and positive pole pieces to be welded onto the cylindrical battery, and the second station can provide vertical limiting for the cylindrical battery after welding. The utility model has the advantages of: realizing the use of the same device for limiting the cylindrical battery in the welding and pull-out force testing processes, and high working efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to an integrated device for testing the welding and pulling force of a cylindrical battery core. Background Art

[0002] With the rapid development of my country's new energy vehicle industry, the demand for welding of cylindrical battery cell pole pieces is increasing, and at the same time, the requirements for pull-out force testing after pole piece welding are getting higher and higher. The patent document with announcement number CN220462777U discloses a pole piece welding tool for cylindrical battery cells. By setting a welding plate and a positioning column, the positioning column can be inserted into the gap between the cylindrical battery cells, thereby realizing the positioning between the positioning column and the battery module. The welding plate fixed with the positioning column is pressed down to complete the positioning between the welding plate and the cylindrical battery cell pole piece, thereby improving the welding accuracy. The existing pole piece welding tool can only be used for positioning the battery cell and pole piece during the welding process, and cannot be used for pull-out force testing after the pole piece welding is completed, and the work efficiency is low. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the cylindrical battery core is limited by using the same device during welding and pulling force testing.

[0004] The utility model solves the above-mentioned technical problems through the following technical means: a cylindrical battery cell welding and pull-out force testing integrated device, comprising a cylindrical battery cell limiting mechanism, a pole piece limiting mechanism and a limiting and clamping mechanism; the cylindrical battery cell limiting mechanism can provide bottom support and lateral limiting for the cylindrical battery cell; the pole piece limiting mechanism can provide limiting for the negative and positive pole pieces to be welded; the limiting and clamping mechanism has a first station and a second station, the first station can press the negative and positive pole pieces to be welded onto the cylindrical battery cell, and the second station can provide vertical limiting for the cylindrical battery cell after welding.

[0005] As an optimized technical solution, the cylindrical battery cell limiting mechanism includes a bottom plate, a side plate and a battery cell fixing block, the front and rear sides of the bottom plate are respectively fixedly connected with the side plates, the pole piece limiting mechanism and the limiting and pressing mechanism are both arranged on the side plates, and the left and right sides of the bottom plate are respectively provided with battery cell fixing blocks with adjustable mutual distances. It is suitable for various cylindrical battery cell sizes and has compatibility.

[0006] As an optimized technical solution, a first waist-shaped hole is opened on the battery cell fixing block, and the battery cell fixing block is fixedly connected to the base plate by a first bolt that passes through the first waist-shaped hole and is threadedly connected to the base plate.

[0007] As an optimized technical solution, the side panels are fixedly connected to the base plate by bolts.

[0008] As an optimized technical solution, the pole piece limiting mechanism includes a negative limit block, a first positive limit block and a second positive limit block, and each side panel is provided with a negative limit block with adjustable height, and the first positive limit block and the second positive limit block are respectively arranged on the left and right sides of the base plate and are respectively fixedly connected to the negative limit block.

[0009] As an optimized technical solution, a negative electrode sheet limiting groove is provided on the top of the negative limit block, and a positive electrode sheet limiting groove is provided on the top of the first positive limit block and the second positive limit block.

[0010] As an optimized technical solution, a second waist-shaped hole is opened on the negative limit block, and the negative limit block is fixedly connected to the side plate by a second bolt that passes through the second waist-shaped hole and is threadedly connected to the side plate.

[0011] As an optimized technical solution, the first positive limit block and the second positive limit block are respectively fixedly connected to the negative limit block by bolts.

[0012] As an optimized technical solution, the limiting and clamping mechanism includes a lower pressing plate and an upper pressing plate; one end of the lower pressing plate is hinged on one of the negative limit blocks, and the lower pressing plate is provided with a first avoidance opening for making room for the welding parts of the negative and positive electrodes; one end of the upper pressing plate is hinged on the second positive limit block, and the upper pressing plate is provided with a second avoidance opening for making room for the welding parts of the negative and positive electrodes; a barrier structure is provided at the bottom of the upper pressing plate, and the barrier structure can pass through the lower pressing plate. The first station is that the lower pressing plate is pressed downward, and the upper pressing plate is pressed tightly on top of the lower pressing plate. The upper pressing plate presses the lower pressing plate to press the negative and positive electrodes to be welded onto the cylindrical battery cell, and at the same time, the barrier structure contacts the cylindrical battery cell; the second station is that the lower pressing plate is opened, and the upper pressing plate is directly pressed on the welded cylindrical battery cell, and the barrier structure provides vertical limiting for the welded cylindrical battery cell.

[0013] As an optimized technical solution, the position limiting and clamping mechanism further includes a clamp block and a quick caliper, the first positive limit block is provided with a quick caliper, and the end of the upper pressure plate opposite to the hinged end is fixedly connected with a clamp block corresponding to the quick caliper. This can realize rapid positioning and clamping of the battery cell and the pole piece, and is easy to operate.

[0014] The advantages of the utility model are:

[0015] 1. The device effectively reduces the tediousness of welding and pull-out force testing of cylindrical battery cells, and realizes the use of the same device for limiting the cylindrical battery cells during welding and pull-out force testing, with high work efficiency.

[0016] 2. The device is suitable for a variety of cylindrical battery cell sizes and is compatible.

[0017] 3. The device can quickly locate and clamp the battery cells and pole pieces, and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a first-angle axonometric schematic diagram of the integrated device for cylindrical battery core welding and pull-out force testing according to an embodiment of the utility model.

[0019] Figure 2 This is a second angle axonometric schematic diagram of the integrated device for cylindrical battery core welding and pull-out force testing according to an embodiment of the utility model.

[0020] Figure 3 It is a schematic diagram of the welding structure of the battery core according to an embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described in combination with the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0022] like Figures 1 to 3 As shown, an embodiment of the utility model discloses an integrated device for cylindrical battery core welding and pull-out force testing, including a cylindrical battery core limiting mechanism, a pole piece limiting mechanism and a limiting pressing mechanism.

[0023] The cylindrical battery cell limiting mechanism can provide bottom support and lateral limiting for the cylindrical battery cell 13; the electrode sheet limiting mechanism can provide limiting for the negative electrode sheet 11 and the positive electrode sheet 12 to be welded; the limiting and clamping mechanism has a first station and a second station, the first station can press the negative electrode sheet 11 and the positive electrode sheet 12 to be welded onto the cylindrical battery cell 13, and the second station can provide vertical limiting for the cylindrical battery cell 13 after welding.

[0024] The cylindrical battery cell limiting mechanism comprises a bottom plate 1, a side plate 2 and a battery cell fixing block 4; the bottom plate 1 serves to provide bottom support for the cylindrical battery cell 13, the front and rear sides of the bottom plate 1 are respectively fixedly connected with the side plates 2 by bolts, the pole piece limiting mechanism and the limiting clamping mechanism are both arranged on the side plates 2, the side plates 2 provide support for the pole piece limiting mechanism and the limiting clamping mechanism, and the distance between the two side plates 2 is sufficient to accommodate cylindrical battery cells 13 of various diameters; the left and right sides of the bottom plate 1 are respectively provided with battery cell fixing blocks 4 with adjustable mutual distances, and the distance between the two battery cell fixing blocks 4 can provide lateral limitation for cylindrical battery cells 13 of different diameters by adjusting the distance between the two battery cell fixing blocks 4; the battery cell fixing block 4 is an L-shaped plate, and a first waist-shaped hole is provided on the bottom horizontal plate of the battery cell fixing block 4, the battery cell fixing block 4 is fixedly connected with the bottom plate 1 by a first bolt that passes through the first waist-shaped hole and is threadedly connected to the bottom plate 1, and the distance between the two battery cell fixing blocks 4 is adjusted by adjusting the fixed position of the first bolt in the first waist-shaped hole.

[0025] The electrode piece limiting mechanism includes a negative limit block 3, a first positive limit block 5 and a second positive limit block 6; each side plate 2 is respectively provided with a negative limit block 3 with an adjustable height, and a negative electrode piece limiting groove is provided on the top of the negative limit block 3. By adjusting the height of the negative limit block 3, the welding height requirements of the negative electrode pieces of cylindrical cells 13 of different heights can be adapted; a second waist-shaped hole is provided on the negative limit block 3, and the negative limit block 3 is fixedly connected to the side plate 2 by a second bolt that passes through the second waist-shaped hole and is threadedly connected to the side plate 2. The height of the negative limit block 3 is adjusted by adjusting the fixed position of the second bolt in the second waist-shaped hole; the first positive limit block 5 and the second positive limit block 6 are respectively arranged on the left and right sides of the base plate 1 and are respectively fixedly connected to the negative limit block 3 by bolts, and the tops of the first positive limit block 5 and the second positive limit block 6 are both provided with positive electrode sheet limiting grooves. When the height of the negative limit block 3 is adjusted, the first positive limit block 5 and the second positive limit block 6 move up and down synchronously with it, which can adapt to the positive electrode sheet welding height requirements of cylindrical battery cells 13 of different heights.

[0026] The limiting and clamping mechanism includes a lower pressing plate 7, an upper pressing plate 8, a clamping block 9 and a quick caliper 10; one end of the lower pressing plate 7 is hinged on one of the negative limit blocks 3, and the end of the lower pressing plate 7 opposite to the hinged end contacts the other negative limit block 3 when pressed down, and contacts the negative electrode sheet 11 and the positive electrode sheet 12 when pressed down, and the lower pressing plate 7 is provided with a first avoidance opening for making room for the welding parts of the negative electrode sheet 11 and the positive electrode sheet 12; the first positive limit block 5 is provided with a quick caliper 10, one end of the upper pressing plate 8 is hinged on the second positive limit block 6, and the other end of the upper pressing plate 8 is fixedly connected to a clamping block 9 corresponding to the quick caliper 10, and the upper pressing plate 8 is provided with a second avoidance opening for making room for the welding parts of the negative electrode sheet 11 and the positive electrode sheet 12; a partition structure is provided at the bottom of the upper pressing plate 8, and the partition structure can pass through the lower pressing plate 7 to contact the cylindrical battery cell 13.

[0027] The first working position of the limiting and clamping mechanism is that the lower pressing plate 7 is pressed downward, the upper pressing plate 8 is pressed on the top of the lower pressing plate 7 and the clamp block 9 is connected with the quick clamp 10, the upper pressing plate 8 presses the lower pressing plate 7 to press the negative electrode sheet 11 and the positive electrode sheet 12 to be welded on the cylindrical battery cell 13, and the barrier structure contacts the cylindrical battery cell 13; the second working position is that the lower pressing plate 7 is opened, the upper pressing plate 8 is directly pressed on the welded cylindrical battery cell 13 and the clamp block 9 is connected with the quick clamp 10, and the welded cylindrical battery cell 13 is provided with vertical limit through the barrier structure.

[0028] Working principle: During welding, first place the cylindrical battery cell 13 on the bottom plate 1, adjust the distance between the two battery cell fixing blocks 4, and provide lateral limit for the cylindrical battery cell 13; then adjust the height of the negative limit block 3, and provide limit for the negative electrode sheet 11 and the positive electrode sheet 12 through the negative limit block 3, the first positive limit block 5 and the second positive limit block 6; then press the lower pressure plate 7 downward, press the upper pressure plate 8 tightly on top of the lower pressure plate 7, and the clamping block 9 is connected with the quick caliper 10, and the upper pressure plate 8 presses the lower pressure plate 7 to press the negative electrode sheet 11 and the positive electrode sheet 12 to be welded onto the cylindrical battery cell 13. At this time, the negative electrode sheet 11 and the positive electrode sheet 12 can be welded to the cylindrical battery cell 13.

[0029] After welding is completed, the upper pressing plate 8 and the lower pressing plate 7 are opened, and the ends of the welded negative electrode sheet 11 and the positive electrode sheet 12 are bent; then the lower pressing plate 7 is kept open, and the upper pressing plate 8 is directly pressed on the welded cylindrical battery cell 13, and the clamping block 9 is connected with the quick caliper 10, and the vertical limit is provided for the welded cylindrical battery cell 13 through the barrier structure to ensure that the cylindrical battery cell 13 will not move during the pull-out force test of the negative electrode sheet 11 and the positive electrode sheet 12.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated device for welding and pulling force testing of cylindrical battery cells, characterized in that: It includes a cylindrical battery cell limiting mechanism, a pole piece limiting mechanism and a limiting and pressing mechanism; the cylindrical battery cell limiting mechanism can provide bottom support and lateral limiting for the cylindrical battery cell; the pole piece limiting mechanism can provide limiting for the negative and positive pole pieces to be welded; the limiting and pressing mechanism has a first station and a second station, the first station can press the negative and positive pole pieces to be welded onto the cylindrical battery cell, and the second station can provide vertical limiting for the cylindrical battery cell after welding.

2. The cylindrical battery core welding and pull-out force testing integrated device according to claim 1, characterized in that: The cylindrical battery cell limiting mechanism includes a bottom plate, a side plate and a battery cell fixing block. The front and rear sides of the bottom plate are respectively fixedly connected with the side plates. The pole piece limiting mechanism and the limiting and clamping mechanism are both arranged on the side plates. The left and right sides of the bottom plate are respectively provided with battery cell fixing blocks with adjustable mutual distances.

3. The cylindrical battery core welding and pull-out force testing integrated device as claimed in claim 2, characterized in that: The battery cell fixing block is provided with a first waist-shaped hole, and the battery cell fixing block is fixedly connected to the bottom plate by a first bolt that passes through the first waist-shaped hole and is threadedly connected to the bottom plate.

4. The cylindrical battery core welding and pull-out force testing integrated device as claimed in claim 2, characterized in that: The side plates are fixedly connected to the bottom plate by bolts.

5. The cylindrical battery core welding and pull-out force testing integrated device as claimed in claim 2, characterized in that: The pole piece limiting mechanism includes a negative limit block, a first positive limit block and a second positive limit block. Each side plate is provided with a negative limit block with adjustable height. The first positive limit block and the second positive limit block are respectively arranged on the left and right sides of the bottom plate and are respectively fixedly connected to the negative limit block.

6. The integrated device for welding and pulling force testing of cylindrical battery cells according to claim 5, characterized in that: A negative electrode plate limiting groove is provided on the top of the negative limit block, and a positive electrode plate limiting groove is provided on the top of both the first positive limit block and the second positive limit block.

7. The integrated device for testing welding and pulling force of cylindrical battery cells according to claim 5, characterized in that: A second waist-shaped hole is provided on the negative limit block, and the negative limit block is fixedly connected to the side plate by a second bolt that passes through the second waist-shaped hole and is threadedly connected to the side plate.

8. The integrated device for welding and pulling force testing of cylindrical battery cells according to claim 5, characterized in that: The first positive limit block and the second positive limit block are respectively fixedly connected to the negative limit block by bolts.

9. The cylindrical battery core welding and pull-out force testing integrated device as claimed in claim 5, characterized in that: The limiting and clamping mechanism includes a lower pressure plate and an upper pressure plate; one end of the lower pressure plate is hinged on one of the negative limit blocks, and the lower pressure plate is provided with a first avoidance opening for making room for the welding parts of the negative and positive electrodes; one end of the upper pressure plate is hinged on the second positive limit block, and the upper pressure plate is provided with a second avoidance opening for making room for the welding parts of the negative and positive electrodes; a partition structure is provided at the bottom of the upper pressure plate, and the partition structure can pass through the lower pressure plate.

10. The cylindrical battery core welding and pull-out force testing integrated device according to claim 9, characterized in that: The position limiting and clamping mechanism further comprises a clamping block and a quick caliper. The quick caliper is arranged on the first positive limit block, and a clamping block corresponding to the quick caliper is fixedly connected to the end of the upper pressure plate opposite to the hinged end.

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