Module welding pressure head

Abstract

The utility model belongs to the technical field of welding tools, and discloses a module welding pressure head which comprises a driving connecting plate and a pressure head assembly, a first welding through hole is formed in the driving connecting plate and used for being connected with upstream force application equipment, the pressure head assembly comprises a pressure head body and a pressing piece, and the pressure head body is in sliding connection with the driving connecting plate. And the pressing piece is detachably connected to the side, away from the driving connecting plate, of the pressing head body, is provided with an avoiding hole communicating with the second welding through hole, and is used for being connected with a to-be-welded piece in an abutting mode. According to the pressure head, the detachably-connected pressing piece is arranged on the pressure head body, only the pressing piece needs to be replaced during replacement, the pressure head body does not need to be integrally replaced, the replacement work is faster, the replacement cost is reduced, the driving connecting plate in sliding connection with the pressure head body is arranged, buffering is carried out during pressing, and the pressure head is more convenient to replace. And the damage to the to-be-welded part caused by overlarge pressure during starting is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of welding tooling, in particular to a module welding pressure head. Background Art

[0002] In order to better meet the power demand, a battery module with high energy supply capacity is usually used, wherein the battery module is composed of a number of connected battery cells, and the connection of the several battery cells is achieved by using an adapter.

[0003] When the adapter is connected to the battery cell, the adapter is usually welded to the battery cell pole. During welding, the adapter is usually pressed onto the battery cell pole through a welding press to make the adapter fit the pole to avoid cold welding.

[0004] However, after frequent use, the part where the welding pressure head abuts against the adapter is prone to wear. The worn pressure head has a problem of poor abutment, which affects the quality of welding. Therefore, the welding pressure head needs to be replaced. However, when replacing the welding pressure head, it needs to be replaced as a whole, which not only makes the replacement work very cumbersome but also makes the replacement cost high. Utility Model Content

[0005] The utility model aims to provide a module welding pressure head, which is easy to disassemble and replace and has low replacement cost.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A module welding pressure head is provided, the module welding pressure head comprising:

[0008] A driving connecting plate, wherein a first welding through hole is formed on the driving connecting plate, and the driving connecting plate is used to connect to an upstream force-applying device;

[0009] A pressure head assembly, the pressure head assembly includes a pressure head body and a pressing piece, the pressure head body is slidably connected to the drive connecting plate, and is provided with a second welding through hole corresponding to the first welding through hole, the pressing piece is detachably connected to the side of the pressure head body away from the drive connecting plate, and is provided with an avoidance hole connected to the second welding through hole, and the pressing piece is used to abut against the workpiece to be welded.

[0010] Optionally, the module welding pressure head also includes a connecting component, which includes a sliding rod and a stopper, and the sliding rod includes a first end and a second end, the first end of the sliding rod is fixedly connected to either the pressure head body or the driving connecting plate, and the second end of the sliding rod passes through and is slidably connected to the remaining one of the pressure head body or the driving connecting plate, and then is connected to the stopper.

[0011] Optionally, one of the indenter body or the driving connection plate through which the second end of the sliding rod passes is provided with a sliding through hole corresponding to the sliding rod one by one, and the sliding rod is in sliding fit with the sliding through hole.

[0012] Optionally, the connection assembly further includes an elastic member, and two ends of the elastic member are respectively connected to the driving connection plate and the indenter body, and are sleeved outside the sliding rod.

[0013] Optionally, the indenter body includes a main body portion and a pressing portion. The sliding through hole is provided on the main body portion. After the second end of the sliding rod passes through and is slidably connected to the main body portion, it is connected to the stopper located on the side of the main body portion facing the workpiece to be welded. The pressing portion is provided on the side of the main body portion facing the workpiece to be welded, and the pressing member is detachably connected to the side of the pressing portion facing the workpiece to be welded. The second welding through hole penetrates through the main body portion and the pressing portion.

[0014] Optionally, the pressing portion is a conical structure with a diameter dimension gradually decreasing in the direction close to the workpiece to be welded, and the pressing member is detachably connected to the small-diameter end of the pressing portion.

[0015] Optionally, the indenter body further includes a docking portion, the docking portion is provided on the side of the main body portion facing the driving connection plate and is penetrated by the second welding through hole, and the docking portion is used for abutting against the driving connection plate.

[0016] Optionally, the second welding through hole includes a first hole section and a second hole section that communicate with each other. The first hole section penetrates through the main body portion and the pressing portion, the second hole section penetrates through the docking portion, and the inner diameter dimension of the second hole section is larger than the inner diameter dimensions of the first hole section and the first welding through hole.

[0017] Optionally, an air vent hole intersecting with the second welding through hole is further provided on the indenter body, and the air vent hole is used for communicating the outside with the second welding through hole.

[0018] Optionally, an internal thread is provided on the inner wall of the second welding through hole, and a threaded portion is provided on the pressing member, and the threaded portion is in threaded connection with the internal thread; or

[0019] A countersunk hole is provided on the pressing member, and a fastener penetrates through the countersunk hole and is connected to the indenter body; or

[0020] Among the indenter body and the pressing member, a buckle is provided on one of them, and a clamping groove is provided on the other, and the buckle is in clamping fit with the clamping groove.

[0021] Advantages of the utility model:

[0022] The utility model provides a module welding press head. By arranging a pressing piece on one side of the press head body facing the workpiece to be welded, when pressing the workpiece to be welded, contact is made through the pressing piece. When the pressing piece is worn, since the pressing piece and the press head body are detachably connected, only the pressing piece needs to be replaced, and there is no need to replace the entire press head body. This not only makes the replacement work faster but also reduces the replacement cost. In addition, a driving connecting plate slidably connected to the press head body is arranged between the force applying device and the press head body, so that when pressing the workpiece to be welded, through the relative sliding of the press head body and the driving connecting plate, the pressing process is buffered to avoid excessive pressure during startup and damage to the workpiece to be welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the front view of the module welding press head provided by the utility model;

[0024] Figure 2 is the structural schematic diagram of the press head assembly in the module welding press head provided by the utility model;

[0025] Figure 3 is the schematic diagram of the connection between the counterbore opened on the pressing piece in the press head assembly of the module welding press head of the utility model and the press head body.

[0026] In the figure:

[0027] 1. Driving connecting plate; 11. First welding through hole;

[0028] 2. Press head assembly; 21. Press head body; 211. Second welding through hole; 212. Sliding through hole; 213. Main body part; 214. Vent hole; 215. Thickening protrusion; 216. Docking part; 217. Pressing part; 218. Reinforcing rib; 22. Pressing piece; 221. Avoidance hole;

[0029] 3. Connecting component; 31. Slide bar; 32. Elastic part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following further elaborates on the utility model in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely for explaining the utility model and not for limiting the utility model. Additionally, it should be noted that for the sake of description, only parts related to the utility model are shown in the drawings rather than all the structures.

[0031] In the description of the present utility model, unless otherwise clearly specified and defined, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. 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 circumstances.

[0032] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0033] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0034] To better meet the power consumption requirements, battery modules with high energy supply capabilities are usually adopted. The battery module is composed of a plurality of battery cells connected together, and the connection of the plurality of battery cells is achieved by using adapter plates.

[0035] When the adapter plate is connected to the battery cell, the adapter plate is usually welded to the pole of the battery cell. During welding, the adapter plate is usually pressed on the pole of the battery cell by a welding head to make the adapter plate fit with the pole and avoid false soldering.

[0036] However, after frequent use, the part of the welding head in contact with the adapter plate is prone to wear. The worn welding head has a problem of poor contact, which affects the welding quality. Therefore, it is necessary to replace the welding head. However, when replacing the welding head, since the whole welding head needs to be replaced, not only does the replacement work become very cumbersome, but also the replacement cost is high.

[0037] Therefore, in order to make the replacement work faster and reduce the replacement cost, this embodiment provides a module welding head.

[0038] As shown Figures 1 to 3 in the figure, the module welding press head includes a driving connection plate 1 and a press head assembly 2. A first welding through hole 11 is formed in the driving connection plate 1, and the driving connection plate 1 is used to connect to the upstream force-applying device. The press head assembly 2 includes a press head body 21 and a pressing member 22. The press head body 21 is slidably connected to the driving connection plate 1 and is provided with a second welding through hole 211 corresponding to the first welding through hole 11. The pressing member 22 is detachably connected to the side of the press head body 21 facing away from the driving connection plate 1 and is provided with an avoidance hole 221 communicating with the second welding through hole 211. The pressing member 22 is used to abut against the workpiece to be welded.

[0039] By arranging the pressing member 22 on the side of the press head body 21 facing the workpiece to be welded, when pressing the workpiece to be welded, contact is made through the pressing member 22. When the pressing member 22 is worn, since the pressing member 22 and the press head body 21 are detachably connected, only the pressing member 22 needs to be replaced, and there is no need to replace the entire press head body 21. This not only makes the replacement work faster but also reduces the replacement cost. In addition, a driving connection plate 1 slidably connected to the press head body 21 is arranged between the force-applying device and the press head body 21. When pressing the workpiece to be welded, through the relative sliding of the press head body 21 and the driving connection plate 1, the pressing process is buffered to avoid excessive pressure during startup and damage to the workpiece to be welded.

[0040] Among them, the module welding press head can be used in working conditions that require pressing during welding of various different products. In this embodiment, the module welding press head is mainly used for pressing during the welding of the pole column of the battery cell and the adapter plate. The press head body 21 and the pressing member 22 can adopt a variety of detachable connection methods. For example, as Figure 3 shown in the figure, a countersunk hole is formed in the pressing member 22, and a threaded hole corresponding to the countersunk hole is formed in the press head body 21. The connection between the pressing member 22 and the press head body 21 is realized through a countersunk bolt. In addition, internal threads can be formed in the avoidance hole 221 of the pressing member 22, and external threads corresponding to them are formed on the press head body 21. The connection between the pressing member 22 and the press head body 21 is realized through threaded connection. Or clamping structures that cooperate with each other are arranged on the pressing member 22 and the press head body 21, and the connection is realized through clamping. And in this embodiment, the force-applying device connected to the driving connection plate 1 is a press. By driving the driving connection plate 1 to approach the press head body 21, a thrust is applied to the press head body 21, and finally the press head body 21 drives the pressing member 22 to abut against the workpiece to be welded, that is, the adapter plate, to complete the pressing operation of the adapter plate and the battery cell pole column.

[0041] Optionally, as Figure 1As shown, the module welding head further includes a connecting component 3. The connecting component 3 includes a sliding rod 31 and a stopper. The sliding rod 31 includes a first end and a second end. The first end of the sliding rod 31 is fixedly connected to either the pressing head body 21 or the driving connecting plate 1, and the second end of the sliding rod 31 passes through and is slidably connected to the remaining one of the pressing head body 21 or the driving connecting plate 1 and then is connected to the stopper.

[0042] By fixedly connecting the first end of the sliding rod 31 to either the pressing head body 21 or the driving connecting plate 1, passing the second end of the sliding rod 31 through the remaining one of the pressing head body 21 or the driving connecting plate 1, and connecting a stopper to the second end that passes through, the sliding connection between the driving connecting plate 1 and the pressing head body 21 is realized, and by providing the sliding rod 31, it can also play a role in limiting and guiding the relative sliding between the driving connecting plate 1 and the pressing head body 21.

[0043] In this embodiment, four sliding rods 31 are evenly arranged between the driving connecting plate 1 and the pressing head body 21, thereby improving the strength of limiting and guiding and the firmness of connection. The stopper is not shown in the figure.

[0044] Further, as Figure 1 、 Figure 2 shown, one of the pressing head body 21 or the driving connecting plate 1 through which the second end of the sliding rod 31 passes is provided with sliding through holes 212 corresponding to the sliding rods 31 one by one, and the sliding rod 31 is in sliding fit with the sliding through holes 212.

[0045] By providing sliding through holes 212 corresponding to the sliding rods 31 one by one in one of the pressing head body 21 or the driving connecting plate 1, the passing of the sliding rod 31 is realized. In this embodiment, since the first end of the sliding rod 31 is fixedly connected to the driving connecting plate 1 and the second end passes through the pressing head body 21, the sliding through holes 212 are provided in the pressing head body 21.

[0046] Optionally, as Figure 1 shown, the connecting component 3 further includes an elastic member 32. The two ends of the elastic member 32 are respectively connected to the driving connecting plate 1 and the pressing head body 21 and are sleeved on the outside of the sliding rod 31.

[0047] By providing an elastic member 32 between the driving connecting plate 1 and the pressing head body 21, when pressing, when the applying device makes the driving connecting plate 1 approach the pressing head body 21, the elastic member 32 is used to apply a pre-tightening force to the workpiece to be welded, and when the welding is completed, the elastic member 32 can also play an auxiliary role in the reset between the driving connecting plate 1 and the pressing head body 21. In this embodiment, the elastic member 32 is a spring.

[0048] Optionally, the indenter body 21 includes a main body portion 213 and a pressing portion 217. A sliding through hole 212 is formed in the main body portion 213. After the second end of the sliding rod 31 passes through and is slidably connected to the main body portion 213, it is connected to a stopper located on the side of the main body portion 213 facing the workpiece to be welded. The pressing portion 217 is provided on the side of the main body portion 213 facing the workpiece to be welded. The pressing member 22 is detachably connected to the side of the pressing portion 217 facing the workpiece to be welded. The second welding through hole 211 penetrates through the main body portion 213 and the pressing portion 217.

[0049] By providing the main body portion 213 and forming a sliding through hole 212 on the main body portion 213 for slidably connecting with the sliding rod 31, it is convenient for the indenter body 21 to be slidably connected to the driving connection plate 1 by means of the sliding rod 31, and a pressing portion 217 is provided on the side of the main body 213 facing the workpiece to be welded, so as to facilitate the connection between the pressing member 22 and the indenter body 21.

[0050] Furthermore, the pressing portion 217 is a conical structure with a diameter dimension gradually decreasing in the direction close to the workpiece to be welded. The pressing member 22 is detachably connected to the small-diameter end of the pressing portion 217.

[0051] By setting the pressing portion 217 as a conical structure with a diameter dimension gradually decreasing in the direction close to the workpiece to be welded and connecting the pressing member 22 to the small-diameter end of the pressing portion 217, the structural dimension of the pressing member 22 can be effectively reduced, and thus the manufacturing cost can be effectively reduced when manufacturing the pressing member 22.

[0052] Optionally, the indenter body 21 further includes a docking portion 216. The docking portion 216 is provided on the side of the main body portion 213 facing the driving connection plate 1 and is penetrated by the second welding through hole 211. The docking portion 216 is used to abut against the driving connection plate 1.

[0053] By providing the docking portion 216, during welding, the first welding through hole 11 is surrounded by the docking portion 216 to avoid being interfered by the outside world during welding and ensure the welding quality.

[0054] Furthermore, the second welding through hole 211 includes a first hole section and a second hole section that communicate with each other. The first hole section penetrates through the main body portion 213 and the pressing portion 217. The second hole section penetrates through the docking portion 216. The inner diameter dimension of the second hole section is larger than the inner diameter dimensions of the first hole section and the first welding through hole 11.

[0055] By making the inner diameter dimension of the second hole section larger than the inner diameter dimension of the first welding through hole 11, it is ensured that the first welding through hole 11 is completely covered by the docking portion 216, avoiding problems such as poor sealing caused by processing errors.

[0056] Optionally, as Figure 2As shown, the indenter body 21 is also provided with a vent hole 214, and the vent hole 214 communicates with an external ventilation device and the second welding through hole 211.

[0057] By providing a vent hole 214 on the indenter body 21 that communicates with the outside and the second welding through hole 211, during welding, the vent hole 214 can be used to connect to an external ventilation device, and a welding protective gas can be introduced into the second welding through hole 211 through the external ventilation device, ensuring the safety of the welding process and improving the welding quality.

[0058] In this embodiment, the indenter body 21 further includes a thickening protrusion 215. The thickening protrusion 215 is provided in the area of the main body portion 213 where the vent hole 214 is opened and extends in the direction close to the workpiece to be welded. A part of the vent hole 214 is located on the main body portion 213, and the other part is located on the thickening protrusion 215, thereby ensuring that the indenter body 21 has sufficient thickness after the vent hole 214 is opened and ensuring the structural strength of the indenter body 21. The welding protective gas is argon.

[0059] Optionally, as Figure 2 shown, the indenter body 21 further includes a reinforcing rib 218. One end of the reinforcing rib 218 is connected to the side of the main body portion 213 facing the workpiece to be welded, and the other end is connected to the small-diameter end of the pressing portion 217.

[0060] By connecting one end of the reinforcing rib 218 to the main body portion 213 and the other end to the small-diameter end of the pressing portion 217, the pressing portion 217 is strengthened, and the structural strength of the pressing portion 217 is improved.

[0061] Optionally, the inner wall of the second welding through hole 211 is provided with an internal thread, and the pressing member 22 is provided with a threaded portion, and the threaded portion is threadedly connected to the internal thread; or

[0062] The pressing member 22 is provided with a countersunk hole, and a fastener passes through the countersunk hole and is connected to the indenter body 21; or

[0063] Among the indenter body 21 and the pressing member 22, one is provided with a buckle, and the other is provided with a slot, and the buckle is engaged with the slot.

[0064] By using threaded connection or fastener connection, or by using a snap-fit structure for connection, the detachable connection between the pressing member 22 and the indenter body 21 can be achieved.

[0065] When carrying out actual work, first place the module welding head on the workpiece to be welded. At this time, the pressing member 22 connected to the head body 21 abuts against the workpiece to be welded. Then, the force application device applies pressure to the driving connecting plate 1, and the driving connecting plate 1 moves towards the direction close to the head body 21. At this time, the sliding rod 31 slides on the head body 21 towards the direction close to the workpiece to be welded, and the elastic member 32 is compressed. When the driving connecting plate 1 contacts the docking portion 216, continue to apply pressure until the required pressing force is reached. Then, introduce welding protective gas into the second welding through hole 211 through the ventilation hole 214. The laser welding gun acts on the workpiece to be welded through the first welding through hole 11, the second welding through hole 211 and the avoidance hole 221 for welding. After the welding is completed, the force application device rises. At this time, the driving connecting plate 1 is no longer under pressure, and the elastic member 32 restores its deformation under the action of its own elastic force, thereby pushing the driving connecting plate 1 and the sliding rod 31 to reset. Then, remove the module welding head, and the welding work is completed.

[0066] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A module welding pressure head, characterized in that: The module welding pressure head comprises: A driving connecting plate (1), wherein a first welding through hole (11) is provided on the driving connecting plate (1), and the driving connecting plate (1) is used to connect to an upstream force-applying device; A pressure head assembly (2), the pressure head assembly (2) comprising a pressure head body (21) and a pressing piece (22), the pressure head body (21) being slidably connected to the driving connecting plate (1) and having a second welding through hole (211) corresponding to the first welding through hole (11), the pressing piece (22) being detachably connected to a side of the pressure head body (21) facing away from the driving connecting plate (1) and having an avoidance hole (221) connected to the second welding through hole (211), the pressing piece (22) being used to abut against a workpiece to be welded.

2. The module welding pressure head according to claim 1, characterized in that: The module welding pressure head also includes a connecting component (3), and the connecting component (3) includes a sliding rod (31) and a stopper, and the sliding rod (31) includes a first end and a second end, and the first end of the sliding rod (31) is fixedly connected to either the pressure head body (21) or the driving connecting plate (1), and the second end of the sliding rod (31) passes through and is slidably connected to the remaining one of the pressure head body (21) or the driving connecting plate (1), and is then connected to the stopper.

3. The module welding pressure head according to claim 2, characterized in that: One of the pressure head body (21) or the driving connecting plate (1) through which the second end of the sliding rod (31) passes is provided with a sliding through hole (212) corresponding to the sliding rod (31) one by one, and the sliding rod (31) is slidably matched with the sliding through hole (212).

4. The module welding pressure head according to claim 2, characterized in that: The connecting assembly (3) further comprises an elastic member (32), the two ends of which are respectively connected to the driving connecting plate (1) and the pressing head body (21), and are sleeved on the outer side of the sliding rod (31).

5. The module welding pressure head according to claim 3, characterized in that: The sliding through hole (212) is provided on the pressure head body (21); The pressure head body (21) includes a main body (213) and a pressing part (217); the sliding through hole (212) is opened on the main body (213); the second end of the sliding rod (31) passes through and is slidably connected to the main body (213), and is connected to the stopper located on the side of the main body (213) facing the part to be welded; the pressing part (217) is arranged on the side of the main body (213) facing the part to be welded; the pressing part (22) is detachably connected to the side of the pressing part (217) facing the part to be welded; and the second welding through hole (211) passes through the main body (213) and the pressing part (217).

6. The module welding pressure head according to claim 5, characterized in that: The pressing portion (217) is a conical structure whose diameter gradually decreases in a direction approaching the workpiece to be welded, and the pressing piece (22) is detachably connected to the small-diameter end of the pressing portion (217).

7. The module welding pressure head according to claim 5, characterized in that: The pressure head body (21) further comprises a docking portion (216), which is arranged on a side of the main body (213) facing the driving connection plate (1) and is penetrated by the second welding through hole (211), and is used to abut against the driving connection plate (1).

8. The module welding pressure head according to claim 7, characterized in that: The second welding through hole (211) comprises a first hole segment and a second hole segment which are connected to each other, the first hole segment passes through the main body (213) and the pressing portion (217), the second hole segment passes through the docking portion (216), and the inner diameter of the second hole segment is greater than the inner diameters of the first hole segment and the first welding through hole (11).

9. The module welding pressure head according to any one of claims 1 to 8, characterized in that: The pressure head body (21) is also provided with a vent hole (214), and the vent hole (214) is connected to an external ventilation device and the second welding through hole (211).

10. The module welding pressure head according to any one of claims 1 to 8, characterized in that: The inner wall of the second welding through hole (211) is provided with an internal thread, the pressing member (22) is provided with a threaded portion, and the threaded portion is threadedly connected to the internal thread; or The pressing member (22) is provided with a countersunk hole, and the fastener passes through the countersunk hole and is connected to the pressing head body (21); or One of the pressure head body (21) and the pressing member (22) is provided with a buckle, and the other is provided with a slot, and the buckle is engaged with the slot.

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