Battery module busbar welding device

Abstract

The utility model relates to the technical field of welding positioning devices, in particular to a battery module busbar welding device which comprises a pressing assembly used for pressing a busbar, and the pressing assembly is provided with a laser channel allowing laser to irradiate the welding portion of the busbar. A positioning matching structure for a laser welding device to identify is arranged at the position of the laser channel, the same laser channel is provided with a space for exposing at least two busbar welding portions, when the busbar is welded, after the busbar is pressed by the pressing assembly, the different busbar welding portions can be welded through the same laser channel, and the welding efficiency is improved. When the laser welding equipment recognizes the positioning matching structure at the laser channel for positioning, positioning of all busbar welding parts corresponding to the laser channel can be achieved through one-time positioning recognition operation of the laser channel, the positioning recognition time can be saved, and the welding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding positioning devices, in particular to a battery module busbar welding device. Background Art

[0002] At present, the connection between the busbar and the battery cell of the battery module adopts laser welding technology. In order to ensure the welding quality, a welding device is usually used to fix the position of the busbar and the battery cell. The existing welding device authorization announcement number CN219616964U discloses a tool for fixing the busbar aluminum busbar during module laser welding. The tool includes a workbench, a module tray assembly, a pressure plate, a cylinder and a lifting mechanism. The workbench is fixed with parallel guide rails along its width direction. The module tray assembly is slidably connected to the parallel guide rails. A cylinder is fixed under the workbench surface. The cylinder is connected to the lifting mechanism placed on the workbench. A pressure plate is connected above the lifting mechanism. The corresponding module on the pressure plate The busbar aluminum busbar is provided with a number of laser vias, and pin holes are provided on both sides of the laser vias. The pin holes are slidably connected to the limit pins, and the limit pins are provided with springs. The limit pins are threadedly connected to the sliding pressure block. During welding, the module tray is first pulled out, and the module to be welded is placed in the tray support limit plate for positioning, and the module tray is pushed in and the workpiece clamping quick-release handle of the tray limit fixing mechanism is pressed to limit and fix. After the module is limited, the air valve is opened, and the pressure plate slowly descends and presses the aluminum busbar on the battery cell pole through the sliding pressure block, and the welding robot is started for welding. The pressure plate and the sliding pressure block together constitute a clamping assembly for clamping the busbar on the battery cell. The laser vias on the pressure plate and the center hole of the sliding pressure block form a corresponding laser channel for the laser to illuminate the busbar, and the part of the busbar welded to the battery cell pole constitutes the busbar welding part.

[0003] In the above-mentioned commonly used battery module busbar welding device, one laser channel corresponds to one busbar welding part. During the laser welding process, after one busbar welding part is welded by one laser channel, the welding head of the laser welding robot moves to the next laser channel to weld the next busbar welding part. Since the cross-sectional size of the laser channel is often much larger than the size of the weld point or weld formed by the busbar welding part, and is affected by the error of the tooling installation, after the battery module is fixed to the welding device, the position of the busbar welding part will change, which may cause the actual position to deviate from the position set in advance by the laser welding robot, and then cause the position of the laser robot welding head to deviate from the busbar welding part to be welded. In order to improve the welding position accuracy, a visual component for photographing and positioning is provided at the welding head, and a positioning and matching structure for identification after photographing is provided at the laser channel. Before the welding operation, the laser channel is photographed and positioned by the visual component, and the welding position is corrected by the position of the positioning and matching structure. In this way, when welding each busbar welding part, a photographing and positioning operation is required, which affects the welding efficiency. Utility Model Content

[0004] The utility model aims to provide a battery module busbar welding device to solve the problem that each busbar welding position of the current battery module busbar welding device needs to be identified and positioned one by one, which affects the welding efficiency.

[0005] The technical solution of the battery module busbar welding device of the utility model is:

[0006] A battery module busbar welding device includes a clamping assembly for clamping the busbar, the clamping assembly has a laser channel for laser irradiation to the busbar welding position, a positioning and matching structure for identification by the laser welding equipment is provided at the laser channel, and the same laser channel has space for exposing at least two busbar welding positions.

[0007] Furthermore, a shielding portion for shielding a portion between two adjacent busbar welding locations of the busbar is provided in the laser channel.

[0008] Furthermore, the laser channel has an inner channel opening close to the bus bar when in use, and the shielding portion is flush with the inner channel opening.

[0009] Furthermore, the shielding portion has a pressing surface for pressing the busbar.

[0010] Furthermore, the positioning and matching structure is arranged on the shielding portion.

[0011] Further, the positioning and matching structure is an identification hole, and the identification hole has a circular opening.

[0012] Further, the identification hole is a conical hole.

[0013] Furthermore, the clamping assembly includes a pressing plate and a sliding sleeve movably arranged on the pressing plate, the pressing plate is provided with a limiting through hole for the sliding sleeve to pass through and to limit the sliding sleeve, and the laser channel is arranged on the sliding sleeve.

[0014] Furthermore, the sliding sleeve comprises an upper barrel section and a lower barrel section, and the upper barrel section is anti-rotationally arranged in the limiting through hole.

[0015] Furthermore, the cross-sectional area of ​​the inner cavity of the lower barrel section gradually decreases in the direction away from the upper barrel section.

[0016] Beneficial effects: The utility model improves on the battery module bus welding device in the prior art, by allowing the same laser channel to have space for exposing at least two bus welding parts. In this way, when the bus is welded, after the clamping assembly clamps the bus, different bus welding parts can be welded using the same laser channel. When the laser welding equipment identifies the positioning and matching structure at the laser channel for positioning, the positioning of all bus welding parts corresponding to the laser channel can be achieved with a single positioning and recognition operation of the laser channel, which can save time for positioning and recognition and is beneficial to welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the welding relationship between the busbar and the conductive sheet to be assisted in welding by the tooling in the embodiment of the battery module busbar welding device of the utility model;

[0018] Figure 2 It is a top view schematic diagram of the battery module busbar welding device during welding in an embodiment of the utility model;

[0019] Figure 3 for Figure 2 A three-dimensional schematic diagram of the sliding sleeve in FIG.

[0020] Figure 4 for Figure 3 A schematic diagram of the upper side view of the sliding sleeve;

[0021] Figure 5 for Figure 3 A side view of the sliding sleeve from one perspective;

[0022] Figure 6 for Figure 3 A side view of the sleeve from another perspective;

[0023] Figure 7 for Figure 3 Schematic diagram of the bottom side view of the sliding sleeve.

[0024] In the figure: 100, bus; 101, bus welding part; 200, conductive sheet; 201, conductive sheet welding part; 1, pressure plate; 2, sliding sleeve; 20, laser channel; 21, upper cylinder section; 22, connecting ear; 221, connecting hole; 23, lower cylinder section; 24, protective beam; 25, positioning identification hole. DETAILED DESCRIPTION

[0025] The battery module busbar welding device of the utility model enables the same laser channel to have space for exposing at least two busbar welding parts. In this way, when the busbar is welded, after the clamping assembly clamps the busbar, different busbar welding parts can be welded using the same laser channel. When the laser welding equipment identifies the positioning and matching structure at the laser channel for positioning, the positioning of all busbar welding parts corresponding to the laser channel can be achieved with a single positioning and recognition operation of the laser channel, which can save the time of positioning and recognition and is beneficial to welding efficiency.

[0026] Embodiment of the battery module busbar welding device of the utility model:

[0027] like Figure 1 As shown, the battery module busbar welding device in this embodiment is used for laser welding operation of the busbar 100 and the conductive sheet 200 of the battery module. The battery module is a soft-pack battery module. The busbar 100 is a flat structure and is arranged horizontally. The conductive sheet 200 is an L-shaped structure. The conductive sheet 200 has a vertical section and a horizontal section. The vertical section is used to connect with the battery cell tab of the battery module. The battery cell is a single battery of the battery module. The horizontal section of the conductive sheet 200 is welded to the busbar 100. The conductive sheet 200 is located on the lower side of the busbar 100. The same busbar 100 can be welded to multiple conductive sheets 200. In this embodiment, the same busbar 100 is welded to four conductive sheets 200. The horizontal section of the conductive sheet 200 has a conductive sheet welding portion 201. The busbar 100 has a busbar welding portion 101. The busbar welding portion 101 corresponds to the conductive sheet welding portion 201 one by one and is laser welded together. When the busbar 100 is welded to the conductive sheet 200, the welding head of the laser welding device is located above the busbar 100, and the laser can illuminate the busbar welding part 101. In order to position the battery module during welding, a battery module busbar welding device is used.

[0028] like Figure 1 , Figure 2 , Figure 3As shown, the battery module busbar welding device includes a support assembly for supporting the battery module and a clamping assembly for pressing the busbar 100 onto the conductive sheet 200. The support assembly can be referred to the prior art and will not be described here. A fixed support structure is provided on the upper part of the battery module to fix and support the conductive sheet 200 after the conductive sheet 200 is welded to the battery cell tab. The busbar 100 can be pressed onto the conductive sheet 200 to achieve welding with the battery cell. The clamping assembly includes a pressing plate 1 and a sleeve 2 movably arranged on the pressing plate 1. The pressing plate 1 is provided with a driving mechanism for driving it to move up and down. When the pressing plate 1 moves up and down, it can drive the sleeve 2 to move up and down. When the sleeve 2 moves downward, it can press the busbar 100 onto the conductive bar to ensure the welding quality between the busbar 100 and the conductive sheet 200.

[0029] In order to allow the laser to illuminate the busbar welding part 101, the clamping assembly has a laser channel 20, and the laser channel 20 is arranged in the sliding sleeve 2, and the laser channel 20 is connected from top to bottom. In order to ensure the accuracy of the welding position, a positioning and matching structure for the laser welding equipment to identify is provided at the laser channel 20, and the visual component of the laser welding equipment can identify the positioning and matching structure, and then identify the welding position. In this embodiment, the same laser channel 20 has a space for exposing two busbar welding parts 101, that is, the two busbar welding parts 101 are welded using the same laser channel 20, so that a single positioning and recognition operation of the laser channel 20 can realize the positioning of all busbar welding parts 101 corresponding to the laser channel 20, confirm the specific position of the weld, save the time of positioning and recognition, and is beneficial to welding efficiency.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the sleeve 2 includes an upper barrel section 21 and a lower barrel section 23. The inner cavities of the upper barrel section 21 and the lower barrel section 23 are used to form a laser channel 20. In this embodiment, the weld formed by welding the bus bar 100 and the conductive sheet 200 is a long strip weld, so the laser channel 20 is generally a rectangular channel. Accordingly, the upper barrel section 21 is a rectangular barrel, the lower barrel section 23 is a pyramidal barrel, the horizontal cross-section of the inner cavity of the lower barrel section 23 is rectangular, and the cross-sectional area of ​​the inner cavity of the lower barrel section 23 in the direction away from the upper barrel section 21 is Gradually becomes smaller, that is, the size of the lower barrel section 23 gradually becomes smaller from top to bottom, the four side surfaces of the outer circumference of the lower barrel section 23 are all inclined surfaces, the inner cavity of the upper barrel section 21 and the inner cavity of the lower barrel section 23 are connected up and down, the upward barrel mouth of the upper barrel section 21 constitutes the outer channel opening of the laser channel 20, and the downward barrel mouth of the lower barrel section 23 is provided with the inner channel opening of the laser channel 20, so that the size of the lower barrel section 23 gradually becomes smaller from top to bottom, saving space and avoiding interference with the structure near the bus 100 when the sliding sleeve 2 presses the bus 100.

[0031] The two adjacent conductive sheets 200 are arranged at intervals, and the bus 100 has a portion corresponding to the gap between the two adjacent conductive sheets 200. In order to prevent the laser from accidentally welding through the portion and burning the battery core, a shielding portion for shielding the portion between the two adjacent bus welding parts 101 of the bus 100 is provided in the laser channel 20. The shielding portion is a protective beam 24, and the protective beam 24 forms the shielding portion, which is easy to manufacture. In this embodiment, the protective beam 24 is horizontal in the middle of the laser channel 20, and the protective beam 24 extends in the left and right directions. The left and right ends of the protective beam 24 are respectively connected to the left and right inner walls of the lower barrel section 23. The laser channel 20 includes the space located on the front and rear sides of the protective beam 24 in the inner cavity of the lower barrel section 23 and the space located above the protective beam 24. The space located on the front and rear sides of the protective beam 24 at the lower end opening of the inner cavity of the lower barrel section 23 constitutes the inner channel opening of the laser channel 20. The protective beam 24 is used to protect the welding blind area formed by the interval between the two conductive sheets 200 to prevent poor welding from causing product welding to be scrapped.

[0032] A positioning identification hole 25 is provided at the center of the protection beam 24. The positioning identification hole 25 constitutes a positioning matching structure. The positioning matching structure is set on the protection beam 24, which has a wide field of view and is convenient for the visual component recognition of the laser welding equipment. The positioning identification hole 25 has a circular opening, which is convenient for the adaptation of the visual component for shape recognition. The positioning identification hole 25 is a conical hole, which has an upward circular opening and a pointed bottom. The use of the apex of the cone helps to determine the center position of the positioning hole, which is conducive to accurate position recognition.

[0033] The space in front and rear of the protection beam 24 in the laser channel 20 meets the welding requirements of the bus welding part 101. When the sleeve 2 is pressed against the bus 100, the inner channel opening of the laser channel 20 is close to the bus 100. The protection beam 24 is flush with the inner channel opening of the laser channel 20, that is, the lower side of the protection beam 24 is flush with the lower end surface of the lower barrel section 23, which is convenient for processing. The lower side of the protection beam 24 constitutes the pressing surface of the shielding part for pressing the bus 100, so that the lower side of the protection beam 24 can press the bus 100, which is conducive to reliable pressing.

[0034] The busbar welding positions 101 in the same laser channel 20 can be welded synchronously by different laser beams of the laser welding equipment, which is beneficial to improving the welding efficiency.

[0035] The number of the sleeves 2 is set according to the welding requirements. The pressing plate 1 is provided with a limiting through hole for the sleeve 2 to pass through and limit the position of the sleeve 2. The upper barrel section 21 of the sleeve 2 is inserted into the limiting through hole of the pressing plate 1, and the upper barrel section 21 is set in the limiting through hole to prevent rotation, which is conducive to ensuring the position of the laser channel 20 relative to the bus welding part 101. The lower end of the upper barrel section 21 is provided with connecting ears 22 on both sides, and the connecting ears 22 are provided with connecting holes 221. The connecting holes 221 are threaded holes. The pressing plate 1 is provided with through holes corresponding to the connecting holes 221. Bolts are used to pass through the through holes on the pressing plate 1 and are threadedly connected in the connecting holes 221. A spring is set on the part of the bolt located between the pressing plate 1 and the connecting ears 22, so that the spring plays a buffering role when the bus 100 is pressed.

[0036] In other embodiments, the same laser channel may also have space for exposing more than three busbar welding locations.

[0037] In other implementations, it is also possible to choose not to provide the shielding portion according to the circumstances.

[0038] In other implementations, the protection beam may not be flush with the inner channel opening, and the protection beam may be disposed at an upper position of the lower barrel section to play a shielding role.

[0039] In other implementations, the positioning and matching structure may also be a positioning column arranged on the protection beam.

[0040] In other implementations, the positioning and matching structure may also be a convex column arranged on the inner wall of the laser channel.

[0041] In other implementations, the positioning and matching structure may also be a circular hole whose inner wall surface is a cylindrical surface, and the circular hole is a hole of equal diameter.

[0042] In other implementations, the sliding sleeve and the pressing plate may also be configured as an integral structure.

[0043] In other embodiments, the battery module busbar welding device can also be used for welding the battery cell poles and the busbars of the battery module, and accordingly, the laser channel can be a circular hole channel.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery module busbar welding device, comprising a clamping assembly for clamping the busbar, the clamping assembly having a laser channel for laser irradiation to the busbar welding part, and a positioning matching structure for laser welding equipment to identify is provided at the laser channel, wherein: The same laser channel has spaces for exposing at least two busbar welding locations.

2. The battery module busbar welding device according to claim 1, characterized in that: A shielding portion for shielding a portion between two adjacent busbar welding locations of the busbar is arranged in the laser channel.

3. The battery module busbar welding device according to claim 2, characterized in that: The laser channel has an inner channel opening close to the bus bar when in use, and the shielding portion is flush with the inner channel opening.

4. The battery module busbar welding device according to claim 3, characterized in that: The shield has a pressing surface for pressing the busbar.

5. The battery module busbar welding device according to any one of claims 2 to 4, characterized in that: The positioning and matching structure is arranged on the shielding part.

6. The battery module busbar welding device according to claim 5, characterized in that: The positioning and matching structure is an identification hole, and the identification hole has a circular opening.

7. The battery module busbar welding device according to claim 6, characterized in that: Identify the hole as a conical hole.

8. The battery module busbar welding device according to any one of claims 1 to 4, characterized in that: The clamping assembly comprises a pressing plate and a sliding sleeve movably arranged on the pressing plate. The pressing plate is provided with a limiting through hole for the sliding sleeve to pass through and to limit the sliding sleeve. The laser channel is arranged on the sliding sleeve.

9. The battery module busbar welding device according to claim 8, characterized in that: The sliding sleeve comprises an upper cylinder section and a lower cylinder section, and the upper cylinder section is anti-rotationally arranged in the limiting through hole.

10. The battery module busbar welding device according to claim 9, characterized in that: The cross-sectional area of ​​the inner cavity of the lower barrel section gradually decreases in the direction away from the upper barrel section.

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