Large cylindrical battery pack laser welding fixing device

Abstract

The utility model discloses a large cylinder battery pack laser welding fixing device which comprises a positioning mechanism and a pressing mechanism, the positioning mechanism comprises a bottom plate and a positioning jig, the bottom plate is provided with a welding positioning area, the positioning jig is arranged on the bottom plate in a sliding mode, and the positioning jig is used for moving a battery pack to the welding positioning area; the pressing mechanism comprises a pressing plate and a plurality of pressing pieces, the pressing plate is arranged above the welding positioning area in a liftable mode, the pressing pieces are arranged on the pressing plate, and when the positioning jig moves to the welding positioning area, the pressing plate is used for driving the pressing pieces to move in the direction of the welding positioning area so that the pressing pieces can press and fix the welding positions on the battery pack; therefore, the welding fixing device can press the welding positions on the same face of the battery pack tightly by pressing downwards at a time, the problem that in the prior art, a pressing piece needs to ascend and descend many times to position and press different welding positions is solved, welding efficiency is improved, and production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery laser welding fixing device, in particular to a big cylindrical battery group laser welding fixing device. BACKGROUND

[0002] In the production of big cylindrical battery group, the busbar on the battery group support and the cell pole need to be welded, in the existing welding processing equipment, usually adopts a pressure head to press and fix a welding position to carry out the welding operation, the pressure head is fixedly connected with the air cylinder, and the positioning and pressing of the welding position are completed by the air cylinder driving to ascend and descend, after the welding of one welding position is completed, the battery module position is moved through the displacement mechanism on the equipment to enter the positioning and pressing of the next welding position.

[0003] As above, in the existing welding operation process, one position is welded each time, the pressure head is driven by the air cylinder to ascend and descend once, and the displacement mechanism also needs to move correspondingly, so the welding efficiency is not high, and the same pressure head is pressed multiple times, which is easy to damage and increase the production cost. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the insufficient in prior art, and provides a big cylindrical battery group laser welding device, through setting up the pressing mechanism with multiple pressure pieces, the pressing of the welding position on the same face of the battery group is completed once, the welding efficiency is improved, and the production cost is reduced.

[0005] The utility model aims at overcoming the insufficient in prior art, and provides a big cylindrical battery group laser welding device, through setting up the pressing mechanism with multiple pressure pieces, the pressing of the welding position on the same face of the battery group is completed once, the welding efficiency is improved, and the production cost is reduced.

[0006] A big cylindrical battery group laser welding fixing device, comprising

[0007] A positioning mechanism, the positioning mechanism comprises a bottom plate and a positioning jig, the bottom plate is provided with a welding positioning area, the positioning jig is slidably arranged on the bottom plate, and the positioning jig is used for moving the battery group to the welding positioning area.

[0008] A pressing mechanism, the pressing mechanism comprises a pressing plate and multiple pressure pieces, the pressing plate is arranged above the welding positioning area in a lifting mode, each pressure piece is arranged on the pressing plate, when the positioning jig moves to the welding positioning area, the pressing plate is used for driving each pressure piece to move to the welding positioning area, so that each pressure piece presses and fixes the welding position on the battery group.

[0009] Further, the positioning jig comprises a sliding assembly and a placing plate, the placing plate is used for placing the battery pack, the sliding assembly comprises a moving tray, a limiting block and a guide rail, the guide rail is arranged on the bottom plate, the moving tray is arranged on the guide rail, the moving tray is used for placing the placing plate, and the limiting block is arranged at the front and rear ends of the guide rail and is used for limiting the sliding range of the moving tray along the guide rail.

[0010] Further, corresponding positioning connection structures are arranged between the moving tray and the placing plate and between the placing plate and the battery pack.

[0011] Further, a plurality of convex columns are arranged on the placing plate, the top of the convex column is high, and the convex column one-to-one supports the cell pole column of the battery pack.

[0012] Further, the pressing mechanism further comprises a support, the support is arranged on the left and right sides of the pressing plate, the bottom of the support is connected with the bottom plate, the support comprises a support column and a support block, the support block is used for erecting the pressing plate, and the support block is arranged above the support column in a lifting mode.

[0013] Further, the support block is provided with a first positioning piece, which is used for transversely positioning and fastening the pressing plate, and the top of the support column is provided with a second positioning piece, which faces the support block and is used for vertically positioning and fastening the support block.

[0014] Further, a pressing piece is connected above the left and right ends of the pressing plate, the pressing piece is connected with the support block, and the pressing piece is used for providing pressure for the pressing piece on the pressing plate.

[0015] Further, a first buffer piece is arranged between the pressing piece and the pressing plate, and a second buffer piece is arranged between the support column and the support block, and the first buffer piece and the second buffer piece are used for providing buffer when the pressing piece is pressed to the welding position of the battery pack.

[0016] Further, the pressing piece comprises a pressing block part and a pressing head part, the pressing block part is detachably connected with the pressing plate, the pressing head part is connected with the pressing block part, when the positioning jig moves to the welding positioning area, the pressing block part is used for pressing the bus bar of the battery pack, and the pressing head part is used for pressing the cell pole column of the battery pack.

[0017] Further, the pressing head part is uniformly provided with heat dissipation holes around the pressing head part.

[0018] The utility model discloses beneficial effects:

[0019] The utility model discloses a big cylindrical battery group laser welding fixing device, through setting up positioning mechanism and pressure mechanism cooperation, pressure mechanism sets up the pressing plate, is provided with a plurality of pressure spare on the pressing plate, when the battery group with the positioning fixture of positioning mechanism moves to the welding positioning area, the pressing plate drives the pressure spare to move to the direction of welding positioning area to make each pressure spare to the welding position on the battery group pressure fixed, thereby once pressing can complete the pressure of the welding position on the same face of battery group, solve the positioning of the pressure spare of prior art and need to go up, drop to complete different welding position, thereby improve the welding efficiency, reduce production cost, further, the pressing plate and the pressure spare on it can replace, like this, can compatible assembly, improve the versatility. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, below will to the drawing needed in the embodiment of using simple introduction, should understand, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the range, for the ordinary skill in the art person, under the premise of not paying the creative labor, can also obtain other related drawings according to these drawings.

[0021] Figure 1 It is the schematic diagram of the utility model big cylindrical battery group laser welding device;

[0022] Figure 2 It is the schematic diagram before the utility model device assembly placement plate and battery group;

[0023] Figure 3 It is Figure 2 The schematic diagram of assembly upper placement plate and battery group;

[0024] Figure 4 It is Figure 3 The schematic diagram of assembly pressing plate and pressure battery group;

[0025] Figure 5 It is Figure 2 The schematic diagram of assembly lower placement plate and battery group. DETAILED DESCRIPTION

[0026] In order to facilitate understanding the utility model, below will refer to relevant drawings and carry out more comprehensive description to the utility model. The preferred embodiment of the utility model is given in the drawing. However, the utility model can be realized in many different forms, and is not limited to the embodiment described in this paper. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein the terms "s", "above", "below", "left", "right", "first", "second", and similar terms are used for description only and not meant to be limiting.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0029] Referring to Figures 1 to 5 a large cylindrical battery pack laser welding device embodiment, the device comprises:

[0030] A positioning mechanism, the positioning mechanism comprises a base plate 1 and a positioning jig, the base plate is provided with a welding positioning area, the positioning jig is slidingly arranged on the base plate 1, and the positioning jig is used to move the battery pack to the welding positioning area; and

[0031] A pressing mechanism, the pressing mechanism comprises a pressing plate 2 and a plurality of pressing pieces 21, the pressing plate 2 is arranged above the welding positioning area in a lifting manner, each pressing piece 21 is arranged on the pressing plate, and when the positioning jig moves to the welding positioning area, the pressing plate 2 is used to drive each pressing piece 21 to move in the direction of the welding positioning area, so that each pressing piece 21 presses and fixes the welding position on the battery pack.

[0032] The device is matched by the positioning mechanism and the pressing mechanism, the pressing mechanism is provided with the pressing plate 2, the pressing plate 2 is provided with a plurality of pressing pieces 21, when the battery pack moves to the welding positioning area with the positioning jig of the positioning mechanism, the pressing plate 2 drives the pressing pieces 21 to move in the direction of the welding positioning area, so that each pressing piece 21 presses and fixes the welding position on the battery pack, thereby completing the pressing of the welding position on the same surface of the battery pack by one-time pressing.

[0033] In one embodiment of the embodiment, the positioning jig comprises a sliding assembly and a placement plate 11 for placing the battery pack, the sliding assembly comprises a moving tray 12, a limiting block 13 and a guide rail 14, the guide rail 14 is arranged on the bottom plate, the moving tray 12 is arranged on the guide rail 14, and the limiting block 13 is arranged at the front and rear ends of the guide rail 14 to limit the sliding range of the moving tray 12 along the guide rail 14. Before welding, the moving tray 12 is moved to the front end of the guide rail 14, the placement plate 11 is placed on the moving tray 12, then the battery pack is placed on the placement plate 11, and then the moving tray 12 is moved to the welding positioning area at the rear end of the guide rail 14.

[0034] In order to enable the moving tray 12 to be stably parked when moving to the front end of the guide rail 14 to install the placement plate 11 and the battery pack or moving to the rear end of the guide rail 14 together with the battery pack, corresponding magnetic attraction members 15 can be arranged between the front and rear ends of the moving tray 12 and the limiting block 13.

[0035] In one embodiment of the embodiment, corresponding positioning connection structures are arranged between the moving tray 12 and the placement plate 11 and between the placement plate 11 and the battery pack. In this way, after the placement plate 11 is assembled on the moving tray 12 through the positioning connection structure, the battery pack is assembled on the placement plate 11 through the positioning connection structure. After assembly, the moving tray 12 is moved to the welding positioning area for compression and fixation and welding of the battery pack. During operation, the connection between the battery pack and the placement plate 11 and between the placement plate 11 and the moving tray 12 is stable, and the battery pack will not be offset due to shaking to affect the compression and fixation and welding effect.

[0036] In a specific implementation, the corresponding positioning connection structure between the moving tray 12 and the placement plate 11 is arranged as follows: the moving tray 12 is provided with a positioning pin 121, and the placement plate 11 is provided with a bushing 122. When the placement plate 11 is placed on the moving tray 12, the bushing 122 is correspondingly inserted with the positioning pin 121.

[0037] In a specific implementation, the placement plate 11 comprises an upper placement plate 112 and a lower placement plate 113. When the lower support 41 of the battery pack is welded, the upper placement plate 112 is used to connect the lower support 41 of the battery pack. When the upper support 42 of the battery pack is welded, the lower placement plate 113 is used to connect the upper support 42 of the battery pack. The corresponding positioning connection structure between the placement plate and the battery pack is arranged as follows: the upper placement plate 112 is provided with a first positioning pin 51, and the first positioning pin 51 is connected with a first positioning hole 52 arranged on the surface of the lower support 41 of the battery pack. The lower placement plate 113 is provided with a second positioning hole 53, and the second positioning hole 53 is connected with a second positioning pin 54 arranged on the surface of the upper support 42 of the battery pack.

[0038] It should be noted that the positioning and connecting structure in the above embodiment does not constitute a substantial limitation on the present application. The corresponding positioning and connecting structure can be an existing structure design scheme or a deformation of the existing structure design scheme.

[0039] In an embodiment of the embodiment, a plurality of convex columns 114 are arranged on the placement plate 11, the top of each convex column 114 is at the same height, and each convex column 114 corresponds to support the cell pole of the battery pack. By arranging the convex columns 114 on the placement plate 11 to correspond to support the cell pole of the battery pack, the deformation of the battery pack support caused by the excessive height difference between the cells is prevented, so that the laser welding equipment does not need to have a welding distance measuring function, and the height difference between the cells can be ensured by the device, and the welding of the battery pack in the same direction can be reliably and quickly completed at one time.

[0040] In an embodiment of the embodiment, the pressing mechanism further includes a support 22 arranged on the left and right sides of the pressing plate 2, the bottom of the support 22 is connected with the bottom plate 1, the support 22 includes a support column 221 and a support block 222, the support block 222 is used to support the pressing plate 2, the support block 222 is arranged above the support column 221 in a lifting manner, the support block 222 is provided with a first positioning member 223 for transversely positioning and fastening the pressing plate 2, the top of the support column 221 is provided with a second positioning member 224 facing the support block 222 for vertically positioning and fastening the support block 222. In a specific embodiment, the first and second positioning members 223 and 224 are positioned by screws.

[0041] The pressing plate 2 is connected with a pressing member 3 above the left and right ends of the pressing plate 2, the pressing member 3 is connected with the support block 222, and is used to provide pressure for the pressing member 21 on the pressing plate 2.

[0042] In this way, during use, the pressing plate 2 connected with the pressing member 3 is installed between the two support blocks 222, the pressing plate 2 is adjusted to ensure that the pressing member 21 can correspond to the welding position of the battery pack moved to the welding positioning area, the first positioning member 223 is used to keep the pressing plate 2 in this position and transversely lock, then the pressing plate 2 is pressed to the required position by the pressing member 3, to ensure that the pressing member 21 is in contact with the welding position of the battery pack, and the second positioning member 223 is used to vertically lock at this position, so that the position of the pressing plate 2 used each time is the same, and the pressure provided is also the same.

[0043] In order to buffer the stress of the pressing member 21 pressing the welding position of the battery pack, a first buffer member 201 is arranged between the pressing member 21 and the pressing plate 2, and a second buffer member 202 is arranged between the support column 221 and the support block 222, and the first and second buffer members 201 and 202 are buffer springs.

[0044] In the preferred embodiment of the embodiment, the pressing piece 21 comprises a pressing block part 211 and a pressing head part 212, the pressing block part 211 is detachably connected with the pressing plate 2, the pressing head part 212 is connected with the pressing block part 211, when the positioning jig moves to the welding positioning area, the pressing block part 211 is used for pressing the bus bar of the battery pack, the pressing head part 212 is used for pressing the cell pole of the battery pack, the pressing head part 212 is uniformly provided with heat dissipation holes 213, in this way, the pressing head part 211 provided on the pressing piece 31 is in contact with the cell pole of the battery pack and the pressing head part 211 is provided with the heat dissipation holes 213, which is convenient for better alignment with the cell pole and providing uniform pressure, and better heat dissipation, the pressing head part 211 and the pressing block part 212 are detachable, which is convenient for replacement and maintenance.

[0045] The above-mentioned embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A large cylindrical battery pack laser welding fixture, characterized by, Comprising A positioning mechanism comprising a base plate and a positioning jig, the base plate is provided with a welding positioning area, the positioning jig is slidingly arranged on the base plate, and the positioning jig is used to move the battery pack to the welding positioning area; and A pressing mechanism comprising a pressing plate and a plurality of pressing pieces, the pressing plate is arranged above the welding positioning area, each pressing piece is arranged on the pressing plate, and when the positioning jig moves to the welding positioning area, the pressing plate is used to drive each pressing piece to move towards the welding positioning area, so that each pressing piece presses and fixes the welding position on the battery pack.

2. The large cylindrical battery pack laser welding fixture of claim 1, wherein, The positioning jig comprises a sliding assembly and a placing plate, the placing plate is used to place the battery pack, the sliding assembly comprises a moving tray, a limiting block and a guide rail, the guide rail is arranged on the base plate, the moving tray is arranged on the guide rail, the moving tray is used to place the placing plate, and the limiting block is arranged at the front and rear ends of the guide rail to limit the sliding range of the moving tray along the guide rail.

3. The large cylindrical battery pack laser welding fixture of claim 2, wherein, Corresponding positioning connection structures are arranged between the moving tray and the placing plate, and between the placing plate and the battery pack.

4. The large cylindrical battery pack laser welding fixture of claim 3, wherein, A plurality of convex columns are arranged on the placing plate, the top of the convex column is high, and the convex column one-to-one supports the cell pole column of the battery pack.

5. The large cylindrical battery pack laser welding fixture of claim 1, wherein, The pressing mechanism further comprises a support, the support is arranged on the left and right sides of the pressing plate, the bottom of the support is connected with the base plate, the support comprises a support column and a support block, the support block is used to support the pressing plate, and the support block is arranged above the support column in a lifting manner.

6. The large cylindrical battery pack laser welding fixture of claim 5, wherein, The support block is provided with a first positioning piece for transversely positioning and fastening the pressing plate, and the top of the support column is provided with a second positioning piece facing the support block for vertically positioning and fastening the support block.

7. The large cylindrical battery pack laser welding fixture of claim 6, wherein, A pressing piece is connected above the left and right ends of the pressing plate, the pressing piece is connected with the support block, and is used to provide pressure for the pressing piece on the pressing plate.

8. The large cylindrical battery pack laser welding fixture of claim 7, wherein, First buffer pieces are arranged between the pressing pieces and the pressing plate, and second buffer pieces are arranged between the support column and the support block.

9. The large cylindrical battery pack laser welding fixture of claim 1, wherein, The pressing piece comprises a pressing block part and a pressing head part, the pressing block part is connected with the pressing plate, the pressing head part is connected with the pressing block part, when the positioning jig moves to the welding positioning area, the pressing block part is used to press the bus bar of the battery pack, and the pressing head part is used to press the cell pole column of the battery pack.

10. The large cylindrical battery pack laser welding fixture of claim 9, wherein, The pressing head part is uniformly provided with heat dissipation holes around.

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