Welding tool for battery module

Abstract

The utility model relates to a welding tool for a battery module. The welding tool comprises a base, the base frame is arranged on the base; the sliding seat assembly is slidably connected to the base frame in the first direction, and the first direction is the extension direction of the base frame; the welding plate assembly is movably connected to the sliding base assembly in the second direction and is opposite to the base, and the second direction is different from the first direction. Welding of the battery module is usually laser welding, and during welding, the battery module to be welded is firstly placed on the base; then the positions of the welding plate assembly in the first direction and the second direction are adjusted to correspond to the battery module; and then the elastic pressing block assembly presses the battery cell, and then laser sequentially penetrates through the welding substrate and the elastic pressing block assembly so as to weld the bar piece and the pole. It can be seen that through position adjustment of the welding plate assembly in the first direction and the second direction, a good corresponding relation can be formed between the welding plate assembly and the battery module, then the welding deviation is reduced, and the welding precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a welding tool for a battery module. Background Art

[0002] During the production process of battery packs or battery modules, the busbars of the battery modules or battery packs need to be welded. Specifically, the poles and tabs on adjacent cells in the battery module are welded together to connect multiple cells in the battery module in series and achieve current convergence and conduction.

[0003] However, there are multiple battery cells in a battery module or battery pack, and the tooling plate used for welding is difficult to align the battery cells, which will affect the welding between the pole and the tab, resulting in welding deviation and reduced welding accuracy. Utility Model Content

[0004] The purpose of the utility model is to provide a welding tool for a battery module to solve the problem of low welding precision in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A welding tool for a battery module comprises: a base; a base frame arranged on the base; a sliding seat assembly slidably connected to the base frame in a first direction, the first direction being the extension direction of the base frame; a welding plate assembly movably connected to the sliding seat assembly in a second direction and arranged opposite to the base, the second direction being different from the first direction.

[0007] Optionally, the base frame is provided with a second locking member, and the sliding seat assembly includes: a sliding seat, which is slidably connected to the base frame in a first direction; a first locking member, which is directly or indirectly movably connected to the sliding seat; the first locking member can move with the sliding seat to a corresponding second locking member, and the first locking member can move to lock and cooperate with the second locking member to constrain the sliding seat assembly's freedom of movement in the first direction.

[0008] Optionally, the sliding seat assembly also includes: a connecting frame connected to the sliding seat; an adjusting seat, slidably connected to the connecting frame in a first direction, and a first locking member movably provided on the adjusting seat; an adjusting screw, which is rotatably provided on one of the connecting frame and the adjusting seat and spirally rotates to cooperate with the other of the connecting frame and the adjusting seat to drive the adjusting seat to slide along the first direction.

[0009] Optionally, the sliding seat assembly also includes a driving screw, which is spirally driven to cooperate with one of the adjustment seat and the first locking member, and is rotatably provided on the other of the adjustment seat and the first locking member to drive the first locking member to move to lock and cooperate with the second locking member.

[0010] Optionally, one of the first locking member and the second locking member is provided with a slot, and the other of the first locking member and the second locking member can be accommodated in the slot, so that the first locking member is locked and matched with the second locking member.

[0011] Optionally, the sliding seat assembly includes a sliding seat and a clamping screw, and the sliding seat is connected to the base frame by sliding in a first direction; the welding plate assembly includes a welding base plate and a connecting plate, the welding base plate is arranged opposite to the base, the connecting plate is connected to the welding base plate, the connecting plate is provided with an oblong hole, and the sliding seat is provided with a threaded hole corresponding to the oblong hole; the clamping screw is sequentially penetrated with the oblong hole and the threaded hole, and the clamping screw and the oblong hole are slidably matched along the second direction.

[0012] Optionally, the sliding seat assembly further includes an elastic support assembly, which is supported and arranged between the sliding seat and the connecting plate, and the clamping screw can drive the welding substrate to move away from or closer to the base along with the connecting plate.

[0013] Optionally, the elastic support assembly includes a support plate and an elastic support member, the elastic support member is supported and arranged between the support plate and the sliding seat, and the connecting plate is arranged on a side of the support plate away from the elastic support member.

[0014] Optionally, one of the support plate and the connecting plate is provided with a positioning protrusion, and the other is provided with a positioning recess, and the positioning protrusion can be accommodated in the positioning recess, so that the welding plate assembly is locked and matched with the sliding seat assembly in the first direction through the positioning protrusion and the positioning recess.

[0015] Optionally, the elastic support assembly further includes a guide shaft, which is disposed on the support plate, and the sliding seat is provided with a guide hole, and the guide shaft can be movably inserted into the guide hole.

[0016] Optionally, a positioning groove is provided on the base, and at least a portion of the base frame is accommodated in the positioning groove.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0018] The welding tool disclosed in the present application is used for battery modules, and the welding tool includes: a base; a base frame, which is arranged on the base; a sliding seat assembly, which is slidably connected to the base frame in a first direction, and the first direction is the extension direction of the base frame; a welding plate assembly, which is movably connected to the sliding seat assembly in a second direction and is arranged opposite to the base, and the second direction is different from the first direction.

[0019] The welding plate assembly includes a welding base plate and an elastic pressure block assembly. The welding base plate is connected to the sliding seat assembly. The elastic pressure block assembly is arranged on the side of the welding base plate facing the base. The elastic pressure block assembly is a hollow structure. A through hole corresponding to the hollow position of the elastic pressure block assembly is arranged on the welding base plate.

[0020] The welding of battery modules is usually done by laser welding. During welding, the battery modules to be welded are first placed on the base in a layout with four in a first direction and two in a second direction; then the position of the welding plate assembly in the first direction and the second direction is adjusted to correspond to the battery module; then the elastic pressure block assembly is pressed against the battery cell to make the bar and the pole in a tight state, and then the laser passes through the welding base plate and the elastic pressure block assembly in turn to weld the bar and the pole.

[0021] After the welding of the current battery module is completed, the welding plate assembly is translated along the first direction to the corresponding next battery module until a row of battery modules is welded, and then the base frame and welding plate assembly are removed and transferred to the corresponding next row of battery modules, and welding is continued in the same way.

[0022] It can be seen that the welding plate assembly in the present application can have a better correspondence between the welding plate assembly and the battery module by adjusting the position in the first direction and the second direction, thereby reducing welding deviation and improving welding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 yes Figure 1 Structural diagram of the assembly without welded plate;

[0025] Figure 3 This utility model Figure 2 A magnified view of point I;

[0026] Figure 4 This utility model Figure 3 The enlarged view of point III;

[0027] Figure 5 This utility model Figure 2 The enlarged view of II;

[0028] Figure 6 It is a second angle view of the utility model;

[0029] Figure 7 This utility model Figure 6 A magnified view of IV;

[0030] Figure 8 This utility model Figure 7 Enlarged view of V;

[0031] Fig. 9 This utility model Figure 6 The enlarged view of VI;

[0032] Fig.10 This utility model Figure 6The enlarged view of VII;

[0033] Fig.11 This utility model Figure 6 Enlarged view of position VIII.

[0034] icon:

[0035] 1-Battery module,

[0036] X-first direction, Y-second direction, Z-third direction,

[0037] 10- Base,

[0038] 11- Positioning slot,

[0039] 20-base frame,

[0040] 21-support, 22-support beam, 23-second locking member, 231-slot, 24-avoidance slot,

[0041] 30-sliding seat assembly,

[0042] 31-sliding seat, 32-first locking member, 33-connecting frame, 331-bearing, 34-adjusting seat, 35-adjusting screw, 36-driving screw, 37-pressing screw, 38-elastic support assembly, 381-support plate, 3811-positioning recess, 382-elastic support member, 383-guide shaft, 39-reference block,

[0043] 40-welded plate assembly,

[0044] 41 - welding base plate, 42 - elastic pressure block assembly, 43 - connecting plate, 431 - positioning protrusion, 432 - oblong hole. DETAILED DESCRIPTION

[0045] The utility model is described in detail below in conjunction with the accompanying drawings.

[0046] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0047] In the production process of battery packs or battery modules, the busbars of the battery modules need to be welded. However, there are multiple cells in the battery module, and the tooling plate used for welding is difficult to align the cells, resulting in welding deviation and reduced welding accuracy. In order to solve such problems, the technical solution of this application is produced. Figures 1 to 11 Describe in detail.

[0048] Example 1

[0049] like Figure 1 , Figure 6 and Figure 7 As shown, the present application discloses a welding fixture for a battery module 1, including a base 10, a base frame 20, a sliding seat assembly 30 and a welding plate assembly 40. Among them, the base 10 is the installation base of the welding fixture of the present application, and the battery module 1 is placed on the base 10. Specifically, the battery module 1 can be placed in four rows in a first direction X and in two rows side by side in a second direction Y. The second direction Y is different from the first direction X. The first direction X can be understood as the extension direction of the base frame 20, that is, the width direction of the welding fixture, and the second direction Y can be understood as the length direction of the welding fixture. The battery module 1 can be a common battery module or a CTP (Cell to Pack) module.

[0050] The base frame 20 is arranged on the base 10, and the base frame 20 is arranged side by side in the second direction Y; specifically, the base frame 20 includes a support 21 and a support beam 22, the support 21 is arranged at two opposite ends of the support beam 22 along the first direction X, and is supported and arranged between the support beam 22 and the base 10, so that the support beam 22 is suspended above the base 10 along the third direction Z. The third direction Z can be understood as the height direction of the welding tool. The sliding seat assembly 30 is slidably connected to the base frame 20 in the first direction X.

[0051] At least part of the welding plate assembly 40 is located between the base frames 20 arranged side by side, and the two opposite ends of the welding plate assembly 40 are respectively connected to a sliding seat assembly 30 in a second direction Y, and the welding plate assembly 40 and the base 10 are arranged opposite to each other along the third direction Z. For example, the welding plate assembly 40 includes Figure 7 The welding substrate 41 and the elastic pressure block assembly 42 are shown, the welding substrate 41 is connected to the sliding seat assembly 30, the elastic pressure block assembly 42 is arranged on the side of the welding substrate 41 facing the base 10, the elastic pressure block assembly 42 is a hollow structure, and a through hole corresponding to the hollow position of the elastic pressure block assembly 42 is arranged on the welding substrate 41.

[0052] The welding of battery modules is usually performed by laser welding. During welding, the battery modules 1 to be welded are first placed on the base 10 in a layout of four rows along the first direction X and two rows side by side along the second direction Y; then the position of the welding plate assembly 40 in the first direction X and the second direction Y is adjusted to correspond to the battery module 1; then the elastic pressing block assembly 42 is pressed against the battery cell to make the tab and the pole in a tight state, and then the laser passes through the welding substrate 41 and the elastic pressing block assembly 42 in turn to weld the tab and the pole.

[0053] After the welding of the current battery module 1 is completed, the welding plate assembly 40 is translated along the first direction X to the corresponding next battery module 1 until the welding of a column of battery modules 1 is completed, and then the base frame 20 and the welding plate assembly 40 are removed and transferred to the corresponding next column of battery modules 1, and the welding is continued in the same way.

[0054] It can be seen that the welding plate assembly 40 in the present application can have a better correspondence between the welding plate assembly 40 and the battery module 1 by adjusting the position in the first direction X and the second direction Y, thereby reducing welding deviation and improving welding accuracy.

[0055] Alternatively, if Figure 2 to Figure 4 As shown, the base frame 20 is provided with a second locking member 23, and a plurality of second locking members 23 can be provided along the first direction X. The second locking member 23 can be provided in the avoidance groove 24 of the base frame 20 to improve the compactness of the device of the present application. The sliding seat assembly 30 may include a sliding seat 31 and a first locking member 32. The sliding seat 31 is connected to the base frame 20 in a sliding manner in the first direction X; and the first locking member 32 is directly or indirectly connected to the sliding seat 31. The first locking member 32 can move with the sliding seat 31 to the corresponding second locking member 23, and the first locking member 32 can move to lock with the second locking member 23 to restrict the freedom of movement of the sliding seat assembly 30 in the first direction X.

[0056] Each second locking member 23 corresponds to a welding station. Specifically, 8 welding stations are arranged on the base 10 in four rows along the first direction X and two rows side by side along the second direction Y. Each welding station is provided with a battery module 1. Four second locking members 23 are arranged in rows along the first direction X. When the welding plate assembly 40 corresponds to one of the welding stations, the first locking member 32 also corresponds to the second locking member 23. When in use, the welding plate assembly 40 can be fixed by the locking cooperation of the first locking member 32 and the second locking member 23 to prevent abnormal movement of the welding plate assembly 40 during welding, thereby further ensuring welding accuracy.

[0057] Further, as mentioned above, the first locking member 32 can be directly movably connected to the sliding seat 31, and in order to improve the rationality of the layout of the welding tooling, the first locking member 32 can be indirectly movably connected to the sliding seat 31, as follows:

[0058] like Figure 2 to Figure 4As shown, the sliding seat assembly 30 may further include a connecting frame 33, an adjusting seat 34 and an adjusting screw 35. The connecting frame 33 is connected to the sliding seat 31. The adjusting seat 34 is connected to the connecting frame 33 in a sliding manner in the first direction X. For example, a slider and a slide rail connected to each other are arranged between the adjusting seat 34 and the connecting frame 33, the slide rail is arranged on the connecting frame 33, and the slider is arranged on the adjusting seat 34. The first locking member 32 is movably arranged on the adjusting seat 34 along the third direction Z. The adjusting screw 35 is rotatably arranged on one of the connecting frame 33 and the adjusting seat 34, and is spirally rotated to fit the other of the connecting frame 33 and the adjusting seat 34. For example, the adjusting screw 35 is rotatably arranged on the connecting frame 33 and is spirally rotated to fit the adjusting seat 34, or the adjusting screw 35 is rotatably arranged on the adjusting seat 34 and is spirally rotated to fit the connecting frame 33. The adjusting screw 35 can drive the adjusting seat 34 to slide along the first direction X.

[0059] During specific use, the first locking member 32 can be locked and matched with the second locking member 23, and then the adjusting screw 35 can be rotated. The spiral driving force generated by the adjusting screw 35 is transmitted to the sliding seat 31 through the adjusting seat 34 and the connecting frame 33 in turn, so that the welding plate assembly 40 can be fine-tuned along the first direction X with the sliding seat 31, thereby further improving the correspondence between the welding plate assembly 40 and the battery module 1 and ensuring the welding accuracy.

[0060] Furthermore, a bearing 331 can be provided on the connecting frame 33, and a lead screw nut (not shown in the figure) can be provided on the adjusting seat 34, and the adjusting screw rod 35 passes through and interference fits the bearing 331 so as to be rotatably connected to the connecting frame 33 through the bearing 331; and the spiral transmission of the adjusting screw rod 35 cooperates with the lead screw nut in the adjusting seat 34 to form a lead screw transmission pair, so as to further improve the adjustment accuracy of the welding plate assembly 40, thereby ensuring the welding accuracy of the battery module 1.

[0061] Further, the sliding seat assembly 30 may also include a driving screw 36. The driving screw 36 is spirally driven and matched with one of the adjustment seat 34 and the first locking member 32, and is rotatably arranged in the other of the adjustment seat 34 and the first locking member 32, for example, the driving screw 36 is spirally driven and matched with the adjustment seat 34, and is rotatably arranged in the first locking member 32, or the driving screw 36 is spirally driven and matched with the first locking member 32, and is rotatably arranged in the adjustment seat 34. The driving screw 36 can drive the first locking member 32 to move to lock and match with the second locking member 23, thereby fixing the welding plate assembly 40 to complete welding, and the driving screw 36 can drive the first locking member 32 to move to separate the second locking member 23, thereby releasing the fixation of the welding plate assembly 40, so that the welding plate assembly 40 can move to correspond to another battery module 1 to be welded. In this way, the driving force generated by the driving screw 36 can better control the movement of the first locking member 32, so as to more effectively maintain the locking fit between the first locking member 32 and the second locking member 23, or release the locking fit between the first locking member 32 and the second locking member 23.

[0062] Optionally, one of the first locking member 32 and the second locking member 23 can be accommodated in the card slot 231 provided on the other of the first locking member 32 and the second locking member 23, so that the first locking member 32 is locked and matched with the second locking member 23, for example, the card slot 231 is provided on the side of the second locking member 23 facing the first locking member 32, or the card slot 231 is provided on the side of the first locking member 32 facing the second locking member 23. In this way, the card slot 231 can realize the card and lock between the first locking member 32 and the second locking member 23, and the locking effect is easier to ensure. Further, the card slot 231 can be a V-shaped groove provided on the second locking member 23, and the end of the first locking member 32 facing the second locking member 23 is a V-shaped end, so that the positioning accuracy is higher.

[0063] Optionally, a slider rail may be provided between the welding plate assembly 40 and the sliding seat assembly 30 to achieve a sliding connection therebetween, and the present application adopts the following method:

[0064] like Figure 6 and Figure 8As shown, the sliding seat assembly 30 may also include a clamping screw 37; the welding plate assembly 40 may include a welding base plate 41 and a connecting plate 43, the welding base plate 41 and the base 10 are arranged relative to each other along the third direction Z, the connecting plate 43 is connected to the welding base plate 41, the connecting plate 43 is provided with an oblong hole 432, the sliding seat 31 is provided with a threaded hole corresponding to the oblong hole, the clamping screw 37 is sequentially passed through the oblong hole 432 and the threaded hole, so that the connecting plate 43 and the sliding seat 31 are connected as a whole, and the clamping screw 37 and the oblong hole 432 are slidably matched along the second direction Y, thereby realizing the position adjustment of the welding plate assembly 40 along the second direction Y, and the adjustment stroke of the welding plate assembly 40 along the second direction Y is determined by the length of the oblong hole 432.

[0065] Alternatively, if Figure 5 and Figure 8 As shown, the sliding seat assembly 30 may further include an elastic support assembly 38, which is supported and arranged between the sliding seat 31 and the connecting plate 43. The pressing screw 37 can drive the welding substrate 41 to move away from or close to the base 10 along with the connecting plate 43. For example, when the pressing screw 37 rotates clockwise, it can drive the welding substrate 41 to move close to the base 10 to press the battery module 1 on the base 10, thereby completing the welding of the battery module 1 and compressing the elastic support assembly 38; after the welding is completed, the pressing screw 37 rotates counterclockwise, and the elastic support assembly 38 restores the elastic deformation to drive the welding substrate 41 away from the base 10. In this way, it is convenient to adjust the position of the welding plate assembly 40 along the third direction Z.

[0066] Optionally, the elastic support component 38 may be an elastic support block, and in order to improve the supporting effect of the elastic support component 38, the present application may adopt the following configuration:

[0067] The elastic support assembly 38 may include a support plate 381 and an elastic support member 382. The elastic support member 382 is supported and arranged between the support plate 381 and the sliding seat 31. The elastic support member 382 may be a spring, an elastic pad, etc. The elastic support member 382 is symmetrically arranged on both sides of the clamping screw 37, and the connecting plate 43 is arranged on the side of the support plate 381 away from the elastic support member 382.

[0068] Optionally, one of the support plate 381 and the connecting plate 43 is provided with a positioning protrusion 431, and the other is provided with a positioning recess 3811, for example, the support plate 381 is provided with a positioning protrusion 431, and the connecting plate 43 is provided with a positioning recess 3811, or the connecting plate 43 is provided with a positioning protrusion 431, and the support plate 381 is provided with a positioning recess 3811. The positioning recess 3811 may be a V-shaped groove, and the positioning protrusion 431 may be a V-shaped protrusion, and the positioning protrusion 431 may be accommodated in the positioning recess 3811, so that the welding plate assembly 40 is locked and matched with the sliding seat assembly 30 in the first direction X through the positioning protrusion 431 and the positioning recess 3811, so as to prevent the welding plate assembly 40 from moving abnormally relative to the sliding seat assembly 30, thereby improving the fixing effect of the welding plate assembly 40 and improving the welding accuracy of the battery module 1.

[0069] Optionally, the elastic support assembly 38 may further include a guide shaft 383, which extends along the third direction Z. The guide shaft 383 is disposed on the support plate 381. The elastic support member 382 may be a spring that sleeves the guide shaft 383. The sliding seat 31 is provided with a guide hole, and the guide shaft 383 can be movably inserted into the guide hole. Through the guiding cooperation between the sliding seat 31 and the guide shaft 383 along the third direction Z, the path constraint of the welding plate assembly 40 can be achieved, and the clamping screw 37 is prevented from abnormally deviating when driving the welding plate assembly 40 away from or close to the base 10.

[0070] Optionally, a reference block 39 can be set on the side of the sliding seat 31 facing away from the base 10. When the welding plate assembly 40 approaches the base 10 and moves to be flush with the reference block 39, it can be determined that the welding plate assembly 40 exerts sufficient extrusion force on the battery module 1 on the base 10 to prevent excessive extrusion.

[0071] Alternatively, if Figure 6 , 9 As shown in Figures 1 to 11, a positioning groove 11 can be provided on the base 10, and at least a portion of the base frame 20 is accommodated in the positioning groove 11, such as the support 21 is positioned in the positioning groove 11, thereby improving the position accuracy of the base frame 20 to better ensure the welding accuracy of the battery module 1.

[0072] Specifically, the positioning grooves 11 can be arranged in three groups along the second direction Y, and each group of positioning grooves 11 is arranged in pairs along the first direction X and are respectively denoted as Fig. 9 The first positioning groove group shown, Fig.10 The second positioning groove group and Fig.11The third positioning groove group shown, i.e., the first positioning groove group, the second positioning groove group, and the third positioning groove group are sequentially arranged along the second direction Y. The base frames 20 arranged side by side can be first installed in the first positioning groove group and the second positioning groove group respectively, so that the welding plate assembly 40 welds a column of battery modules 1 between the first positioning groove group and the second positioning groove group; then the welding plate assembly 40 is removed, and the base frame 20 in the first positioning groove group is transferred to the third positioning groove group, and then the welding plate assembly 40 is installed, so that the welding plate assembly 40 welds another column of battery modules 1 between the third positioning groove group and the second positioning groove group. See Example 2 for the specific welding method.

[0073] Example 2

[0074] This embodiment discloses a method for using a welding tool, using the welding tool of Embodiment 1, as described in detail as follows:

[0075] The battery modules 1 are placed on the base 10 in a layout of four in a row along the first direction X and two rows side by side along the second direction Y, wherein one row of battery modules 1 is located between the first positioning groove group and the second positioning groove group, and another row of battery modules 1 is located between the second positioning groove group and the third positioning groove group; Figure 6 shown.

[0076] Position the two base frames 20 in the first positioning groove group and the second positioning groove group respectively;

[0077] Connect two opposite ends of the welding plate assembly 40 to the sliding seat assembly 30 on the base frame 20 respectively, so that the welding plate assembly 40 spans between the two base frames 20;

[0078] Position the welding plate assembly 40 to correspond to the battery module 1 to be welded;

[0079] The welding process includes: driving the welding plate assembly 40 to press the battery module 1 to be welded; welding the battery module 1 to be welded;

[0080] Driving the welding plate assembly 40 to separate the welded battery module 1;

[0081] Position the welding plate assembly 40 to correspond to another battery module 1 to be welded;

[0082] Repeat the welding process until a row of battery modules 1 is welded;

[0083] Remove the welding plate assembly 40, and switch the base frame 20 in the first positioning groove group to the third positioning groove group;

[0084] Connect two opposite ends of the welding plate assembly 40 to the sliding seat assembly 30 on the base frame 20 respectively;

[0085] The welding process is performed until the welding of another column of battery modules 1 is completed.

[0086] Optionally, connecting two opposite ends of the welding plate assembly 40 to a sliding seat assembly 30 on the base frame 20 specifically includes:

[0087] The welding plate assembly 40 is respectively overlapped with the support plate 381 of the sliding seat assembly 30 on the base frame 20 through the connecting plate 43;

[0088] The pressing screw 37 passes through the oblong hole 432 on the connecting plate 43 and is threadedly connected to the threaded hole on the sliding seat 31 .

[0089] Optionally, positioning the welding plate assembly 40 to correspond to the battery module 1 to be welded specifically includes:

[0090] Positioning the welding plate assembly 40 along the first direction X specifically includes:

[0091] Slide the welding plate assembly 40 along with the sliding seat assembly 30 so that the first locking member 32 corresponds to the second locking member 23 to achieve rough positioning of the welding plate assembly 40;

[0092] The screw rod 36 is rotated to drive the first locking member 32 to move to lock and fit with the second locking member 23;

[0093] Rotate the adjustment screw 35 to adjust the position of the welding plate assembly 40 along the first direction X through the sliding seat assembly 30 until the welding plate assembly 40 corresponds to the battery module 1 to be welded, so as to achieve precise positioning of the welding plate assembly 40;

[0094] The welding plate assembly 40 is positioned along the second direction Y, specifically: the welding plate assembly 40 is adjusted along the second direction Y to the corresponding battery module 1 through the sliding cooperation between the connecting plate 43 and the clamping screw 37 along the second direction Y.

[0095] Optionally, driving the welding plate assembly 40 to press the battery module 1 specifically includes:

[0096] The clamping screw 37 is tightened to drive the connecting plate 43 to approach the base 10 and lower it to be flush with the reference block 39 , so that the elastic clamping block assembly 42 can compress the tabs and poles on the battery module 1 .

[0097] Optionally, before positioning the welding plate assembly 40 to correspond to another battery module 1 to be welded, the method for using the welding tool further includes:

[0098] The screw rod 36 is rotated to drive the first locking member 32 to separate from the second locking member 23 .

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding tool for a battery module (1), characterized in that: include: Base (10); A base frame (20) is arranged on the base (10); A sliding seat assembly (30) is slidably connected to the base frame (20) in a first direction (X), wherein the first direction (X) is an extension direction of the base frame (20); The welding plate assembly (40) is movably connected to the sliding seat assembly (30) in a second direction (Y) and is arranged opposite to the base (10), wherein the second direction (Y) is different from the first direction (X).

2. The welding tool according to claim 1, characterized in that: The base frame (20) is provided with a second locking member (23). The sliding seat assembly (30) comprises: A sliding seat (31) is slidably connected to the base frame (20) in the first direction (X); A first locking member (32) is directly or indirectly movably connected to the sliding seat (31); The first locking member (32) can move with the sliding seat (31) to correspond to the second locking member (23), and, The first locking member (32) can move to a locking engagement with the second locking member (23) to restrict the freedom of movement of the sliding seat assembly (30) in the first direction (X).

3. The welding tool according to claim 2, characterized in that: The sliding seat assembly (30) further comprises: A connecting frame (33) connected to the sliding seat (31); An adjustment seat (34) is slidably connected to the connection frame (33) in the first direction (X), and the first locking member (32) is movably arranged on the adjustment seat (34); An adjusting screw rod (35) is rotatably disposed on one of the connecting frame (33) and the adjusting seat (34), and is spirally rotated to cooperate with the other of the connecting frame (33) and the adjusting seat (34) to drive the adjusting seat (34) to slide along the first direction (X).

4. The welding tool according to claim 2, characterized in that: One of the first locking member (32) and the second locking member (23) is provided with a slot (231), and the other of the first locking member (32) and the second locking member (23) can be accommodated in the slot (231), so that the first locking member (32) is locked and matched with the second locking member (23).

5. The welding tool according to claim 1, characterized in that: The sliding seat assembly (30) comprises a sliding seat (31) and a pressing screw (37), and the sliding seat (31) is slidably connected to the base frame (20) in the first direction (X); The welding plate assembly (40) comprises a welding base plate (41) and a connecting plate (43); the welding base plate (41) is arranged opposite to the base (10); the connecting plate (43) is connected to the welding base plate (41); the connecting plate (43) is provided with an oblong hole (432); and the sliding seat (31) is provided with a threaded hole corresponding to the oblong hole (432); The clamping screw (37) passes through the oblong hole (432) and the threaded hole in sequence, and the clamping screw (37) and the oblong hole (432) are slidably matched along the second direction (Y).

6. The welding tool according to claim 5, characterized in that: The sliding seat assembly (30) further comprises an elastic support assembly (38), wherein the elastic support assembly (38) is supported and arranged between the sliding seat (31) and the connecting plate (43). The pressing screw (37) can drive the welding base plate (41) to move away from or closer to the base (10) along with the connecting plate (43).

7. The welding tool according to claim 6, characterized in that: The elastic support assembly (38) comprises a support plate (381) and an elastic support member (382), wherein the elastic support member (382) is supported and arranged between the support plate (381) and the sliding seat (31). The connecting plate (43) is arranged on a side of the supporting plate (381) facing away from the elastic supporting member (382).

8. The welding tool according to claim 7, characterized in that: One of the support plate (381) and the connecting plate (43) is provided with a positioning protrusion (431), and the other is provided with a positioning recess (3811), and the positioning protrusion (431) can be accommodated in the positioning recess (3811) so that the welding plate assembly (40) can be locked and matched with the sliding seat assembly (30) in the first direction (X) through the positioning protrusion (431) and the positioning recess (3811).

9. The welding tool according to claim 7, characterized in that: The elastic support assembly (38) further comprises a guide shaft (383), wherein the guide shaft (383) is arranged on the support plate (381), and the sliding seat (31) is provided with a guide hole, and the guide shaft (383) can be movably inserted into the guide hole.

10. The welding tool according to claim 1, characterized in that: A positioning groove (11) is provided on the base (10), and at least a portion of the base frame (20) is accommodated in the positioning groove (11).

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