Pressure head assembly and sheet alternate welding device

Abstract

The utility model belongs to the field of battery module assembly, and particularly relates to a pressure head assembly and a chip alternate welding device, according to the pressure head assembly, a plurality of welding copper nozzles are arranged on a carrying frame through a driving piece, in the welding process, the whole pressure head assembly is controlled to move to the position above a battery cell to be assembled into a battery module, and then the welding copper nozzles are arranged on the carrying frame through a driving piece; and then different welding copper nozzles are controlled to be driven by a driving part to alternately abut against the welding portions between electrode columns and chips on different battery cells, and laser welding is conducted on the welding portions corresponding to the welding copper nozzles in the abutting state through a laser welding gun. The pressure head assembly is matched with a laser welding gun to adopt an alternate welding mode, so that accumulated deviation can be reduced, and the welding effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery module assembly, and particularly relates to a pressure head assembly and a buss bar alternating welding device. Background Art

[0002] When assembling a battery module, it is necessary to first press a buss bar and a cell pole column together through a pressure head assembly (including a pressure plate and a plurality of welding copper nozzles arranged on the pressure plate) to fix the welding part between the buss bar and the cell pole column, and then weld the welding part through a laser welding gun.

[0003] When connecting multiple cells through buss bars, welding operations for multiple welding parts are involved. Currently, the following method is usually used for welding: the pressure head assembly presses the whole cell, and the laser welding gun welds row by row from front to back. Such welding operation has the following problems: after the front welding, if deviation occurs and the deviation accumulates and exceeds the threshold, it is easy to cause a large error in the subsequent welding, affecting the welding effect. Utility Model Content

[0004] The embodiments of the present application provide a pressure head assembly and a buss bar alternating welding device, aiming to reduce the deviation accumulation in the welding process and improve the welding effect.

[0005] To this end, according to one aspect of the present application, a pressure head assembly is provided, including:

[0006] A carrier;

[0007] A plurality of welding copper nozzles, arranged in pairs at intervals along a first direction on the carrier, and the two welding copper nozzles in each pair are arranged at intervals in a second direction perpendicular to the first direction; and

[0008] A plurality of driving members, respectively and correspondingly arranged between the plurality of welding copper nozzles and the carrier, and the driving member is used to drive the welding copper nozzle connected thereto to move relative to the carrier along a third direction to approach or move away from the welding part, and the third direction is perpendicular to the plane where the first direction and the second direction are located.

[0009] Optionally, the carrier has a rectangular hollow part, and each welding copper nozzle is located in the hollow part, and the driving member is installed on the carrier on both sides of the hollow part in the first direction.

[0010] Optionally, a guiding assembly is provided between each welding copper nozzle and the carrier, and the guiding assembly is used to guide the welding copper nozzle during the movement of the welding copper nozzle along the third direction.

[0011] Optionally, the guiding component includes a guiding member disposed on the carrier and extending along the third direction, and a sliding member disposed on the side surface of the welding copper nozzle and slidably connected to the guiding member.

[0012] Optionally, the indenter assembly further includes a dust suction hood covering the carrier. The interior of the dust suction hood is communicated with one end of the laser channels of the welding copper nozzles close to the laser incidence. An avoidance opening for the laser welding head to pass through is provided on the dust suction hood.

[0013] Optionally, the driving member includes a micro cylinder or a micro electric push rod.

[0014] Optionally, the indenter assembly further includes a plurality of pressure sensing members. One pressure sensing member is disposed at the connection between each welding copper nozzle and the driving member. When the driving member drives the welding copper nozzle to approach and press against the welding part, the pressure sensing member is triggered.

[0015] Optionally, the driving member is connected to one end of the welding copper nozzle close to the laser incidence of the laser channel through an adapter plate. The pressure sensing member is disposed at the connection between the adapter plate and the driving member or at the connection between the adapter plate and the welding copper nozzle.

[0016] According to another aspect of the present application, a bar piece alternate welding device is provided, including:

[0017] A lifting mechanism;

[0018] The indenter assembly as described above, the carrier is disposed on the lifting mechanism and can perform lifting movement under the drive of the lifting mechanism; and

[0019] A laser welding gun for laser welding the welding part pressed by the welding copper nozzle.

[0020] The beneficial effects of the indenter assembly and the bar piece alternate welding device provided by the present application are as follows: Compared with the prior art, in the indenter assembly of the present application, a plurality of welding copper nozzles are respectively disposed on the carrier through a driving member. During the welding process, first, the entire indenter assembly is controlled to move above the battery cells to be assembled into a battery module, and then different welding copper nozzles are controlled to alternately press against the welding parts between the electrode posts and the bar pieces on different battery cells under the drive of the driving member, and the laser welding gun performs laser welding on the welding parts corresponding to the welding copper nozzles in the pressing state. By adopting the alternate welding method with the cooperation of the indenter assembly and the laser welding gun, the cumulative deviation can be reduced and the welding effect can be improved. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0022] Among them:

[0023] Figure 1 is a schematic perspective view of a indenter assembly shown in an embodiment of the present application;

[0024] Figure 2 is a schematic perspective view of another angle of the indenter assembly shown in an embodiment of the present application;

[0025] Figure 3 is a schematic cross-sectional view of the indenter assembly shown in an embodiment of the present application;

[0026] Figure 4 is a connection schematic diagram of a driving member, a welding copper nozzle, a transfer plate and a pressure sensing member in the indenter assembly shown in an embodiment of the present application;

[0027] Figure 5 is a schematic structure diagram of an indenter assembly with a dust suction cover shown in an embodiment of the present application;

[0028] Figure 6 is a schematic structure diagram of the dust suction cover of the indenter assembly shown in an embodiment of the present application.

[0029] Main element symbol description:

[0030] 10, carrier; 101, hollow part;

[0031] 20, welding copper nozzle;

[0032] 30, driving member;

[0033] 40, guiding assembly; 41, guiding member; 42, sliding member;

[0034] 50, dust suction cover; 51, avoidance opening;

[0035] 60, pressure sensing member;

[0036] 70, transfer plate. Detailed implementation manners

[0037] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0039] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0040] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the description of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0042] It should also be noted that in the embodiments of the present application, the same reference numerals are used to represent the same components or the same parts. For the same parts in the embodiments of the present application, only one of the parts or components may be marked with the reference numeral in the drawings. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0043] As described in the background art, during the assembly process of the existing battery module, the pressing head assembly presses the entire battery cell. After welding at the front, if there is a deviation, and the deviation accumulates and exceeds the threshold, it is likely to cause errors in the subsequent welding and affect the welding effect.

[0044] To solve the above problems, according to one aspect of the present application, embodiments of the present application provide a pressing head assembly, such as Figures 1 - 3As shown in the figure, the indenter assembly includes a carrier 10, a plurality of welding copper nozzles 20, and a plurality of driving members 30. The plurality of welding copper nozzles 20 are arranged in pairs and spaced along a first direction on the carrier 10. The two welding copper nozzles 20 in each group are spaced in a second direction perpendicular to the first direction. It can be understood here that the spacing in the first direction between each two groups of welding copper nozzles 20 is adapted to the thickness of the square battery cell, and the spacing in the second direction between the two welding copper nozzles 20 in each group is adapted to the distance between the two electrode posts on the square battery cell. The plurality of driving members 30 are respectively arranged in one-to-one correspondence between the plurality of welding copper nozzles 20 and the carrier 10. The driving member 30 is used to drive the welding copper nozzle 20 connected thereto to move relative to the carrier 10 along a third direction to approach or move away from the welding part, and the third direction is perpendicular to the plane where the first direction and the second direction are located.

[0045] Among them, the welding copper nozzle 20 has a double-layer nested structure, and the gap between the inner and outer copper sleeves forms a gas flow channel. The welding copper nozzle 20 has a laser channel for the laser to pass through, and a protective gas such as nitrogen can be introduced into the gas flow channel to protect the welding.

[0046] It should be noted that, for the convenience of understanding the directions, an X-Y-Z space coordinate system is established in the figure. Among them, the direction where the X-axis is located is the first direction, the direction where the Y-axis is located is the second direction, and the direction where the Z-axis is located is the third direction. In actual use, the third direction is usually the vertical direction.

[0047] In the embodiment of the present application, the indenter assembly is arranged on the carrier 10 by respectively arranging a plurality of welding copper nozzles 20 through a driving member 30. During the welding process, first, control the entire indenter assembly to move above the battery cells to be assembled into the battery module, and each welding copper nozzle 20 corresponds to each welding part vertically one by one. Then, control different welding copper nozzles 20 to alternately press the welding parts between the electrode posts and the busbars on different battery cells under the drive of the driving member 30, and perform laser welding on the welding parts corresponding to the welding copper nozzles 20 in the pressed state through a laser welding gun. By using the indenter assembly in cooperation with the laser welding gun in an alternating welding manner, the accumulated deviation can be reduced and the welding effect can be improved.

[0048] In one embodiment, as Figures 2 - 3 shown, the carrier 10 has a rectangular hollow portion 101. Each welding copper nozzle 20 is located within the hollow portion 101, and the driving member 30 is installed on the carrier 10 on both sides of the hollow portion 101 in the first direction.

[0049] The hollow portion 101 provides an accommodation space for the welding copper nozzle 20. At the same time, it does not affect the laser passing through the laser channel on the welding copper nozzle 20.

[0050] Specifically, the carrier 10 includes a mounting vertical plate and a rectangular frame connected to the mounting vertical plate. The mounting vertical plate is used for external mounting to fix the entire indenter assembly externally. The internal of the rectangular frame forms the above-mentioned hollow part 101, and the welding copper nozzle 20 is located inside the rectangular frame.

[0051] In one embodiment, as Figure 3 shown, a guiding component 40 is provided between each welding copper nozzle 20 and the carrier 10. The guiding component 40 is used to guide the welding copper nozzle 20 during the movement of the welding copper nozzle 20 along the third direction, so as to improve the stability of the lifting movement of the welding copper nozzle 20.

[0052] Specifically, the guiding component 40 includes a guiding member 41 provided on the carrier 10 and extending along the third direction, and a sliding member 42 provided on the side surface of the welding copper nozzle 20 and slidably connected to the guiding member 41. It can be understood that the guiding member 41 can be a guide rail, and correspondingly, the sliding member 42 is a slider; of course, the guiding member 41 can also be a sliding rod, and correspondingly, the sliding member 42 is a sliding sleeve.

[0053] In one embodiment, as Figures 5 - 6 shown, the indenter assembly further includes a dust suction hood 50. The dust suction hood 50 covers the carrier 10. The interior of the dust suction hood 50 is communicated with one end of the laser channel of each welding copper nozzle 20 close to the laser incidence. An avoidance opening 51 for the laser welding head to pass through is provided on the dust suction hood 50.

[0054] By setting the dust suction hood 50 and connecting the negative pressure suction pipe to the interior of the dust suction hood 50, the dust generated during welding can be timely sucked away by negative pressure, so as to avoid the laser being blocked by dust during welding and affecting the welding effect.

[0055] In one embodiment, the driving member 30 includes a micro cylinder or a micro electric push rod. Taking the micro cylinder as an example, the cylinder body of the micro cylinder is installed on the carrier 10, the piston rod of the micro cylinder is directly or indirectly connected to the welding copper nozzle 20 through a connecting piece, and the axial direction of the piston rod is along the third direction.

[0056] In one embodiment, as Figures 2 - 4 shown, the indenter assembly further includes a plurality of pressure sensing members 60 (such as pressure sensors). A pressure sensing member 60 is provided at the connection part between each welding copper nozzle 20 and the driving member 30. When the driving member 30 drives the welding copper nozzle 20 to approach and press against the welding part, the pressure sensing member 60 is triggered.

[0057] It can be understood that the plurality of pressure sensing members 60 respectively correspond to the plurality of welding parts one by one. By monitoring whether the pressure sensing members 60 are triggered, the target welding parts to be welded can be located.

[0058] Specifically, the pressure sensor 60 is connected to the welding control system, facilitating the welding control system to locate the target welding position, and then controlling the movement of the laser welding torch to perform laser welding on the target welding position.

[0059] In a specific embodiment, as Figures 2 - 4 shown, the driving member 30 is connected to one end of the welding copper nozzle 20 close to the incident laser of the laser channel through an adapter plate 70, and the pressure sensor 60 is disposed at the connection between the adapter plate 70 and the driving member 30 or at the connection between the adapter plate 70 and the welding copper nozzle 20.

[0060] According to another aspect of the present application, an embodiment of the present application further provides a barium piece alternating welding device (not shown in the figure), which includes a lifting mechanism, a pressing head assembly in any of the above embodiments, and a laser welding torch. The carrier in the pressing head assembly is disposed on the lifting mechanism and can perform lifting movement under the drive of the lifting mechanism. The laser welding torch is used to perform laser welding on the welding position pressed by the welding copper nozzle.

[0061] Since the barium piece alternating welding device adopts the pressing head assembly in the above embodiment, it also has the advantages and benefits brought by the above pressing head assembly, and has a better welding effect.

[0062] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0063] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A indenter assembly, characterized in that, Comprising: A carrier; A plurality of welding copper nozzles, arranged in pairs and spaced along a first direction on the carrier, and the two welding copper nozzles of each pair are spaced in a second direction perpendicular to the first direction; And A plurality of driving members, respectively and correspondingly arranged between the plurality of welding copper nozzles and the carrier, and the driving member is used to drive the welding copper nozzle connected thereto to move relative to the carrier along a third direction to approach or move away from the welding part, and the third direction is perpendicular to the plane where the first direction and the second direction are located.

2. The indenter assembly according to claim 1, characterized in that, The carrier has a rectangular hollow portion, and each welding copper nozzle is located within the hollow portion, and the driving member is mounted on the carrier on both sides of the hollow portion in the first direction.

3. The indenter assembly according to claim 1, characterized in that, A guiding assembly is provided between each welding copper nozzle and the carrier, and the guiding assembly is used to guide the welding copper nozzle during the movement of the welding copper nozzle along the third direction.

4. The indenter assembly according to claim 3, wherein, The guiding assembly includes a guiding member provided on the carrier and extending along the third direction and a sliding member provided on the side surface of the welding copper nozzle and slidably connected to the guiding member.

5. The indenter assembly according to claim 1, wherein The indenter assembly further includes a dust suction hood, the dust suction hood covers the carrier, the interior of the dust suction hood is communicated with one end of the laser channels of each welding copper nozzle close to the laser incidence, and an avoidance opening for the laser welding head to pass through is provided on the dust suction hood.

6. The indenter assembly according to claim 1, characterized in that, The driving member includes a micro cylinder or a micro electric push rod.

7. The indenter assembly according to any one of claims 1-6, characterized in that, The indenter assembly further includes a plurality of pressure sensing members, and one pressure sensing member is provided at the connection between each welding copper nozzle and the driving member, and when the driving member drives the welding copper nozzle to approach and press against the welding part, the pressure sensing member is triggered.

8. The indenter assembly according to claim 7, characterized in that, The driving member is connected to one end of the welding copper nozzle close to the incident laser of the laser channel through an adapter plate, and the pressure sensing member is provided at the connection between the adapter plate and the driving member or at the connection between the adapter plate and the welding copper nozzle.

9. An alternating welding device for patch pieces, characterized in that, Comprising: A lifting mechanism; The indenter assembly according to any one of claims 1-8, the carrier is arranged on the lifting mechanism and can perform lifting movement under the drive of the lifting mechanism; And A laser welding gun for performing laser welding on the welding part pressed by the welding copper nozzle.

Images