Positioning device for battery pack nickel sheet welding

Abstract

The utility model provides a positioning device for welding a nickel sheet of a battery pack. The positioning device comprises a positioning seat, a positioning cover, a locking bolt and a positioning block, a clamping groove for placing the battery pack is formed in the top of the positioning seat, the inner wall of the clamping groove is attached to the peripheral wall of the battery pack, and a plurality of nickel sheets connected in series with battery cells are placed at the top of the battery pack; the positioning cover is placed at the top of the battery pack, and a strip-shaped positioning hole is formed in the positioning cover and right above the nickel sheet; one end of each positioning block is mounted on the positioning cover, and the other end of each positioning block extends into the positioning hole to press and limit the nickel sheet; the multiple locking bolts are installed on the outer edge of the positioning cover, and the lower ends of the locking bolts are provided with external threads and connected to the top of the positioning base in a threaded mode after penetrating through the positioning cover. According to the nickel sheet welding device, the time for halfway suspension of the welding machine to place the nickel sheets is saved, the utilization efficiency and the machining efficiency of the welding machine are improved, meanwhile, the nickel sheets are accurately and stably clamped by using the positioning device, and the welding qualification rate of the nickel sheets is effectively improved.

Description

Technical Field

[0001] The utility model relates to welding technology, in particular to a positioning device for welding nickel sheets of a battery pack. Background Art

[0002] The nickel sheet welding process is an important step in the lithium iron phosphate battery PACK process, which directly affects the quality of the battery pack. The existing nickel sheet welding process of lithium iron phosphate batteries is to manually lift the battery pack on the operating table under the welding machine by skilled workers to perform manual welding of the nickel sheet. During manual welding, the worker first manually places the nickel sheet on the welding position of the battery pack under the spot welding machine, and then starts the welding machine to weld the nickel sheet to the battery, and then repeats the above process until the welding of the nickel sheet of the entire battery pack is completed; because it takes a certain amount of time to continuously adjust the position of the nickel sheet during the placement process, and the placement process is carried out under the welding machine, the welding machine cannot be started before the nickel sheet is placed. During the entire welding process, the placement of the nickel sheet alone will occupy more time of the welding machine, which in turn increases the vacancy rate of the welding machine, resulting in a decrease in the utilization efficiency and processing efficiency of the welding machine. In addition, due to certain differences in the operating level of manual welders, the welding process cannot completely and accurately realize the placement and positioning of the nickel sheet, thereby making the nickel sheet welding pass rate low. Utility Model Content

[0003] In order to solve the above problems, the purpose of the utility model is to provide a nickel sheet welding positioning device which can place and position the nickel sheet on the battery pack in advance before welding, and then move it to the welding machine for welding. Through this device, the nickel sheet can be placed and positioned accurately and stably, thereby improving the utilization efficiency and processing efficiency of the welding machine, and at the same time effectively improving the welding qualification rate of the nickel sheet.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A positioning device for welding nickel sheets of a battery pack comprises a positioning seat, a positioning cover, a locking bolt and a positioning block; a slot for placing the battery pack is provided on the top of the positioning seat, the inner wall of the slot is in contact with the outer wall of the battery pack, and a plurality of nickel sheets for connecting the battery cells in series are placed on the top of the battery pack; the positioning cover is placed on the top of the battery pack, and a strip-shaped positioning hole is opened on the positioning cover just above the nickel sheet; there are a plurality of positioning blocks, one end of the positioning block is mounted on the positioning cover, and the other end extends into the positioning hole to press and limit the nickel sheet; there are a plurality of locking bolts which are mounted on the outer edge of the positioning cover, the lower end of the locking bolt has an external thread and penetrates the positioning cover and is threadedly connected to a preset threaded hole on the top of the positioning seat.

[0006] The positioning blocks correspond to the nickel plates one by one. Each positioning block includes a mounting plate, a first limiting plate, a second limiting plate and a pressing plate. The mounting plate is fixed on the positioning cover. One ends of the first limiting plate and the second limiting plate are both fixed on the mounting plate, and the other ends of both extend into the positioning holes and are attached to both sides of the corresponding nickel plate. The pressing plate is arranged between the first limiting plate and the second limiting plate. One end of the pressing plate is fixed on the mounting plate, and the other end extends into the positioning hole and presses on the area between the top of the nickel plate to be welded.

[0007] The beneficial effects of the utility model are as follows:

[0008] Before moving the battery pack under the welding machine for nickel plate welding, the battery pack is clamped and positioned in advance, and the nickel plates are clamped at the parts of the battery pack to be welded in advance. During welding, only need to place the battery pack under the welding machine and start the welding machine for rapid welding, which saves the time for placing the nickel plates by pausing the welding machine midway, improves the utilization efficiency and processing efficiency of the welding machine. At the same time, the use of the positioning device realizes accurate and stable clamping of the nickel plates, effectively improving the welding qualification rate of the nickel plates. Description of the Drawings

[0009] The structure of the utility model will be further described in detail below with reference to the drawings.

[0010] Figure 1 It is a schematic structural diagram of the use state of the positioning device for nickel plate welding of the battery pack described in the utility model.

[0011] Figure 2 is Figure 1 top view of.

[0012] Figure 3 It is a schematic structural diagram of the utility model when welding is completed and the positioning cover is opened.

[0013] Figure 4 It is a schematic structural diagram of the positioning block described in the utility model.

[0014] Figure 5 It is a schematic structural diagram of the positioning block described in the utility model from another perspective.

[0015] As shown in the figure: 1 - positioning seat, 2 - positioning cover, 21 - positioning hole, 22 - limiting baffle, 3 - locking bolt, 4 - positioning block, 41 - mounting plate, 42 - first limiting plate, 43 - second limiting plate, 44 - pressing plate, 45 - limiting groove, 46 - screw, 5 - battery pack, 6 - nickel plate. Detailed Embodiment

[0016] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope protected by the present utility model.

[0017] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope in which the present utility model can be implemented.

[0018] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. It should be noted that the terms "including", "comprising" or any other variant are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not clearly listed, or further includes elements inherent to such process, method, article or device. Embodiment 1

[0019] As Figures 1-3 shown, this embodiment provides a positioning device for nickel sheet welding of a battery pack, including a positioning base 1, a positioning cover 2, a locking bolt 3 and a positioning block 4.

[0020] The positioning seat 1 is a square box with an internal opening. A clamping groove is formed by concave-convex on the top of the positioning seat 1. The inner wall of the clamping groove fits with the outer peripheral wall of the battery pack 5. The lower part of the battery pack 5 is placed in the clamping groove, and the battery pack 5 is limited by the clamping groove to restrict the relative displacement between the battery cells. Multiple nickel sheets 6 for connecting the battery cells in series are placed on the top of the battery pack 5. To prevent the battery pack 5 from being difficult to take out of the positioning seat 1, one side of the positioning seat 1 is open, and a side plate is detachably connected to the open side by bolts. When the battery pack 5 is difficult to take out of the positioning seat 1, the side plate is disassembled, and the battery pack 5 is slid out of the clamping groove.

[0021] The positioning cover 2 is a square plate body, which is placed on the top of the battery pack 5. A strip-shaped positioning hole 21 is opened at a position directly above the nickel sheet 6 on the positioning cover 2. The width and length of the positioning hole 21 are both larger than those of the nickel sheet. As Figures 1 to 3 shown, three horizontal positioning holes 21 are provided in this embodiment, and multiple nickel sheets 6 are provided in each positioning hole 21.

[0022] The number of the positioning blocks 4 is multiple (the same as the number of nickel sheets and corresponding to the nickel sheets one by one). One end of the positioning block 4 is installed on the positioning cover 2, and the other end extends into the positioning hole 21 to press and limit the nickel sheet 6.

[0023] As Figure 4 shown in Figure 5 figures, each positioning block 4 is composed of a mounting plate 41, a first limiting plate 42, a second limiting plate 43 and a pressing plate 44, and the positioning block 4 as a whole has a mountain-shaped structure.

[0024] The mounting plate 41 is fixed on the positioning cover 2. The mounting plate 41 is in an L shape as a whole. The horizontal part of the mounting plate 41 is fixed on the positioning cover 2, and the vertical part of the mounting plate 41 extends into the positioning hole 21 and is arranged parallel to the side of the corresponding nickel sheet 6, parallel to the long side of the nickel sheet 6. The outer wall of the vertical part of the mounting plate 41 fits with the hole wall of the positioning hole 21.

[0025] The first limiting plate 42 and the second limiting plate 43 are located on both sides of the vertical part of the mounting plate 41. One end of the first limiting plate 42 and the second limiting plate 43 is vertically fixed on the vertical part of the mounting plate 41, and the other ends of both extend into the positioning hole 21 and are attached to both sides (short sides) of the corresponding nickel sheet 6 to limit the nickel sheet 6 between them. A limiting groove 45 is provided on the side of the first limiting plate 42 and the second limiting plate 43 in contact with the nickel sheet, and the end of the nickel sheet 6 is located in the limiting groove 45 to effectively limit the displacement of the nickel sheet 6.

[0026] The pressing plate 44 is a spring piece vertically fixed in the middle of the vertical part of the mounting plate 41. The spring piece provides a continuous pressing force to the nickel sheet 6, and at the same time can adapt to nickel sheets 6 of different thicknesses. The pressing plate 44 is arranged in parallel between the first limiting plate 42 and the second limiting plate 43. One end of the pressing plate 44 is vertically fixed on the vertical part of the mounting plate 41, and the other end extends into the positioning hole 21 and extends from the middle of the long side of the nickel sheet 6 to the top of the nickel sheet 6, and then presses on the area between the two sides to be welded on the top of the nickel sheet 6 (the middle of the top of the nickel sheet 6). There are bumps on the bottom of the pressing plate 44 for better pressing of the nickel sheet 6.

[0027] The number of the locking bolts 3 is four and they are evenly installed on the outer edge of the positioning cover 2. The lower end of the locking bolt 3 has an external thread. After the lower end of the locking bolt 3 penetrates the positioning cover 2, it is threadedly connected to the threaded hole preset on the top of the positioning seat 1, locking the positioning cover 2 on the top of the battery pack 5, and using the positioning cover 2 and the positioning block 4 to press and position the nickel sheet 6.

[0028] The steps of clamping and positioning the battery pack 5 and the nickel sheet 6 by using the positioning device for welding the nickel sheet of the battery pack described in this embodiment are as follows:

[0029] (1) Place the battery cells with the electrodes facing up (the battery cells used are cuboid flat battery cells, and the positive and negative electrodes on the top of the battery cells are arranged on the top) and stack them in the positioning box 1 according to the designed layout to form the battery pack 5.

[0030] (2) Place the nickel sheets 6 on the top of the battery pack 5 in series to preliminarily connect the battery cells in series.

[0031] (3) Move the positioning cover 2 downwards and cover it on the top of the battery pack 5, and insert the lower ends of the locking bolts 3 around the positioning cover 2 into the corresponding screw holes on the top of the positioning box 1 respectively.

[0032] (4) Adjust the positions of the nickel sheets 6 so that they are stuck between the first limiting plate 42 and the second limiting plate 43 of the positioning block 4 directly above them.

[0033] (5) Continuously turn the locking bolts 3 until each nickel sheet 6 is pressed by the pressing plate 44 of the positioning block 4 at the corresponding position on the top of the battery pack 3, completing the clamping and positioning of the nickel sheet 6.

[0034] After that, the battery pack 5 with the nickel sheet 6 clamped can be placed on the conveyor and transported under the welding machine for welding. During the welding process of the welding machine, there is no need to interrupt for placing and positioning the nickel sheet 6 again, improving the utilization rate and efficiency of the welding machine.

[0035] After welding is completed, loosen the locking bolts 3 and lift the positioning cover 2 upwards. Embodiment 2

[0036] To improve the placement speed of the nickel sheet 6, the following settings are made in this embodiment based on Embodiment 1:

[0037] The bump at the bottom of the pressing plate 44 is a permanent magnet.

[0038] The steps of clamping and positioning the battery pack 5 and the nickel strip 6 by using the positioning device for welding nickel strips of the battery pack described in this embodiment are as follows:

[0039] (1) Place the battery cells with the electrodes facing upward (the battery cells used are cuboid flat battery cells, and the positive and negative electrodes at the top of the battery cells are arranged at the top), and stack them in the positioning box 1 according to the designed layout to form the battery pack 5.

[0040] (2) Turn the positioning cover 2 over so that the permanent magnet at the bottom of the pressing plate 44 faces upward. Then, place a nickel strip 6 to be welded between the first limiting plate 42 and the second limiting plate 43 of each positioning block 4. The two ends of the nickel strip 6 are stuck in the limiting grooves 45 of the first limiting plate 42 and the second limiting plate 43, and the middle part of the nickel strip 6 contacts the permanent magnet and is adsorbed on the permanent magnet.

[0041] (3) After all the nickel strips 6 are placed, turn the positioning cover 2 over so that the permanent magnet and the nickel strips 6 face the welding position of the battery pack 5 and cover the battery pack 5. At the same time, insert the lower ends of the locking bolts 3 around the positioning cover 2 into the corresponding screw holes at the top of the positioning box 1 respectively, and continuously turn the locking bolts 3 until each nickel strip 6 is accurately aligned and pressed on the corresponding position at the top of the battery pack 5, completing the clamping and positioning of the nickel strips 6.

[0042] Then, the battery pack 5 with the nickel strips 6 clamped can be placed on the conveyor and transported under the welding machine for welding. During the welding process of the welding machine, there is no need to interrupt to place and position the nickel strips 6 again, improving the utilization rate and efficiency of the welding machine.

[0043] After welding is completed, loosen the locking bolts 3 and lift the positioning cover 2 upward. Embodiment 3

[0044] The difference between this embodiment and Embodiment 1 or 2 is that:

[0045] The horizontal part of the mounting plate 41 is fixed to the positioning cover 2 by screws 46 and is detachable, so as to select different specifications of positioning blocks 4 according to the size of the nickel strip 6. Embodiment 4

[0046] To further position the battery pack 6; the following settings are added in this embodiment on the basis of Embodiment 1 or 2:

[0047] Limit baffles 22 that fit on the side walls of the battery pack 6 are respectively provided around the bottom of the positioning cover 2. Other details not elaborated in this utility model are all conventional techniques well known to those skilled in the art.

[0048] It should be noted that the term "comprising", "including" or any other variant is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0049] The protection scope of the present utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modification, equivalent replacement, improvement, etc. made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A positioning device for nickel sheet welding of a battery pack, characterized in that: It includes a positioning base, a positioning cover, locking bolts and positioning blocks; a card slot for placing a battery pack is provided at the top of the positioning base, the inner wall of the card slot fits the outer peripheral wall of the battery pack, and multiple nickel sheets connecting each battery cell in series are placed on the top of the battery pack; the positioning cover is placed on the top of the battery pack, and a strip-shaped positioning hole is opened at a position directly above the nickel sheet on the positioning cover; the number of the positioning blocks is multiple, one end of each positioning block is installed on the positioning cover, and the other end extends into the positioning hole to press and limit the nickel sheet; the number of the locking bolts is multiple and they are installed on the outer edge of the positioning cover, the lower end of the locking bolt has an external thread and penetrates the positioning cover and is threadedly connected to a preset threaded hole at the top of the positioning base.

2. The positioning device for nickel sheet welding of the battery pack according to claim 1, wherein: The positioning blocks correspond to the nickel sheets one by one. Each positioning block includes a mounting plate, a first limiting plate, a second limiting plate and a pressing plate; the mounting plate is fixed on the positioning cover; one ends of the first limiting plate and the second limiting plate are both fixed on the mounting plate, and the other ends of them respectively extend into the positioning hole and fit on both sides of the corresponding nickel sheet; the pressing plate is arranged between the first limiting plate and the second limiting plate, one end of the pressing plate is fixed on the mounting plate, and the other end extends into the positioning hole and presses on the area between the top welding positions of the nickel sheet.

3. The positioning device for nickel sheet welding of the battery pack according to claim 2, wherein: The mounting plate is L-shaped; the horizontal part of the mounting plate is fixed on the positioning cover, and the vertical part of the mounting plate extends into the positioning hole and is arranged parallel to the side of the corresponding nickel sheet; the first limiting plate and the second limiting plate are vertically fixed on both sides of the vertical part of the mounting plate and limit the corresponding nickel sheet between them.

4. The positioning device for nickel sheet welding of the battery pack according to claim 3, characterized in that: Limiting grooves are provided on the sides of the first limiting plate and the second limiting plate in contact with the nickel sheet, and the end of the nickel sheet is located in the limiting grooves.

5. The positioning device for nickel sheet welding of the battery pack according to claim 3, wherein: The pressing plate is a spring piece vertically fixed in the middle of the vertical part of the mounting plate and arranged parallel between the first limiting plate and the second limiting plate.

6. The positioning device for nickel sheet welding of the battery pack according to claim 5, wherein: A convex block pressing on the nickel sheet is provided at the bottom of the pressing plate.

7. The positioning device for nickel sheet welding of the battery pack according to claim 6, characterized in that: The convex block is a permanent magnet.

8. The positioning device for nickel sheet welding of the battery pack according to claim 3, characterized in that: The horizontal part of the mounting plate is fixed on the positioning cover by screws.

9. The positioning device for nickel sheet welding of the battery pack according to any one of claims 1-8, characterized in that: Limit baffles fitting on the side walls of the battery pack are respectively provided around the bottom of the positioning cover.

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