Battery pack welding positioning tool

Abstract

The utility model discloses a battery pack welding and positioning tool, and relates to the technical field of battery production, the battery pack welding and positioning tool comprises a shell and a base frame, the shell comprises a lower box body and a cover body, the lower box body is internally provided with a placing space, at least one side of the lower box body is provided with an opening, and the cover body covers the opening; the lower box body is further provided with a first welding opening, a first limiting structure is arranged at the first welding opening, the placing space is used for placing a battery pack, and the first limiting structure is used for abutting against one end of the battery pack; a mounting part is arranged on the outer surface of the lower box body, and a second limiting structure is arranged on the mounting part; the base frame is provided with a supporting part, and the supporting part is rotationally connected with the mounting part; a third limiting structure is arranged on the supporting part and used for being matched with the second limiting structure to limit relative rotation between the supporting part and the mounting part. According to the technical scheme, the operation difficulty can be reduced, and the welding efficiency and the welding quality are improved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a battery pack welding positioning fixture. Background Technology

[0002] Currently, there are two main welding placement methods for blade-shaped lithium battery packs: side-mounted welding and vertical welding. Side-mounted welding uses robotic arms, which offers high efficiency but also incurs high equipment costs and a long payback period. Furthermore, this method is unsuitable for welding cylindrical, pouch, and prismatic battery packs. Vertical welding uses a gantry-type laser welding machine, requiring manual lifting and turning of the battery pack, which carries the risk of slippage and results in low welding efficiency, affecting weld quality. Therefore, current battery pack welding methods suffer from cumbersome operation and low welding efficiency. Utility Model Content

[0003] The main purpose of this application is to propose a battery pack welding positioning fixture, which aims to solve the problems of cumbersome operation and low welding efficiency in the current battery pack welding methods.

[0004] To achieve the above objectives, the battery pack welding positioning fixture proposed in this application includes:

[0005] The housing includes a lower casing and a cover. The lower casing has an interior space for placing a battery pack, and at least one side of the lower casing has an opening. The cover is placed over the opening. The lower casing also has a first weld joint with a first limiting structure. The placement space is used to insert a battery pack, and the first limiting structure is used to abut against one end of the battery pack. The outer surface of the lower casing has a mounting portion with a second limiting structure.

[0006] The base frame has a support portion that is rotatably connected to the mounting portion. The support portion has a third limiting structure that cooperates with the second limiting structure to restrict the relative rotation between the support portion and the mounting portion.

[0007] In one embodiment, the lower housing is further provided with a locking assembly for locking the cover to the lower housing.

[0008] In one embodiment, the locking assembly includes a first fastener and a second fastener, the first fastener being disposed on the cover and the second fastener being disposed on the outer surface of the lower housing, the first fastener and the second fastener being fastened together.

[0009] In one embodiment, the mounting portion includes a first rotating shaft and a second rotating shaft, which are respectively disposed on opposite sides of the outer surface of the lower housing; the support portion includes a first groove and a second groove, the first rotating shaft is located in the first groove, the second rotating shaft is disposed in the second groove, the first rotating shaft can rotate relative to the first groove, and the second rotating shaft can rotate relative to the second groove.

[0010] In one embodiment, the second limiting structure includes a plurality of first insertion segments and a plurality of second insertion segments, wherein the plurality of first insertion segments are arranged circumferentially around the first rotation axis, and the plurality of second insertion segments are arranged circumferentially around the second rotation axis; the third limiting structure includes a first slot and a second slot, wherein the first slot is disposed on the bottom wall of the first groove, and one of the first insertion segments is inserted into the first slot; the second slot is disposed on the bottom wall of the second groove, and one of the second insertion segments is inserted into the second slot.

[0011] In one embodiment, the lower housing is further provided with a second welding port, and a fourth limiting structure is provided at the second welding port; the first welding port and the second welding port are provided on opposite sides of the lower housing, and the second limiting structure and the fourth limiting structure are respectively used to abut against the two ends of the battery pack.

[0012] In one embodiment, the first limiting structure includes a first baffle, and the fourth limiting structure includes a second baffle.

[0013] In one embodiment, the base frame includes a bottom frame, a first support frame, and a second support frame. The lower ends of the first support frame and the second support frame are respectively connected to the top of the bottom frame. There is a gap between the first support frame and the second support frame. The upper ends of the first support frame and the second support frame are provided with the support portion. The housing is located between the first support frame and the second support frame.

[0014] In one embodiment, each of the four bottom corners of the bottom frame is provided with a base support, the base support being detachably connected to the mounting surface; and / or,

[0015] The bottom frame is set as a rectangular frame, and both the first support frame and the second support frame are set as triangular frames.

[0016] In one embodiment, the housing is provided with a first abutment, a second abutment, a third abutment and a fourth abutment on the side facing the first support frame or the second support frame, wherein the first abutment and the second abutment abut against the two sides of the first support frame or the second support frame respectively; or the third abutment and the fourth abutment abut against the two sides of the first support frame or the second support frame respectively.

[0017] The technical solution of this application includes a housing and a base frame. The housing includes a lower casing and a cover. The placement space inside the lower casing is used to insert the battery pack. The cover design at the opening facilitates the insertion and removal of the battery pack. Through the first limiting structure abutting against one end of the battery pack, the battery pack can be quickly and accurately positioned during welding without the need for repeated manual adjustments, thus simplifying the preparation work before welding. The support part of the base frame is rotatably connected to the mounting part of the housing. With the use of the second and third limiting structures, it is convenient to rotate the housing to switch the welding angle during welding, avoiding the tedious operation of manually flipping the battery pack in traditional welding, reducing positioning errors and time waste caused by manual operation, greatly shortening the positioning time and improving welding efficiency. At the same time, the fixing effect of the first limiting structure ensures the stability of the battery pack during welding, reducing welding defects caused by battery pack shaking or positional displacement, thereby improving welding quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a structural embodiment of the battery pack welding positioning fixture provided in this application;

[0020] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0021] Figure 3 for Figure 1 A magnified view of a section at point B in the middle;

[0022] Figure 4 A schematic diagram of the structure of another embodiment of the battery pack welding positioning fixture provided in this application;

[0023] Figure 5 for Figure 4 A magnified view of a section at point C;

[0024] Figure 6 for Figure 4 A magnified view of a section at point D;

[0025] Figure 7 This is a front view structural schematic diagram of an embodiment of the battery pack welding positioning fixture provided in this application.

[0026] Explanation of icon numbers:

[0027] 1. Shell; 11. Lower housing; 111. First weld joint; 1111. First limiting structure; 112. Second weld joint; 1121. Fourth limiting structure; 113. Mounting part; 1131. Second limiting structure; 1132. First rotating shaft; 1133. Second rotating shaft; 114. Locking assembly; 1141. First fastener; 1142. Second fastener; 12. Cover; 13. First abutment; 14. Second abutment; 15. Third abutment; 16. Fourth abutment; 2. Base frame; 21. Support part; 211. Third limiting structure; 212. First groove; 2121. First slot; 213. Second groove; 2131. Second slot; 22. Bottom frame; 23. First support frame; 24. Second support frame; 25. Base support; 3. Battery pack.

[0028] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0032] Currently, there are two main welding placement methods for blade-shaped lithium battery packs: side-mounted welding and vertical welding. Side-mounted welding uses robotic arms, which offers high efficiency but also incurs high equipment costs and a long payback period. Furthermore, this method is unsuitable for welding cylindrical, pouch, and prismatic battery packs. Vertical welding uses a gantry-type laser welding machine, requiring manual lifting and turning of the battery pack, which carries the risk of slippage and results in low welding efficiency, affecting weld quality. Therefore, current battery pack welding methods suffer from cumbersome operation and low welding efficiency.

[0033] To address the aforementioned issues, this application proposes a battery pack welding positioning fixture.

[0034] Please see Figures 1 to 7 In one embodiment of this application, the battery pack welding positioning fixture includes a housing 1 and a base frame 2. The housing 1 includes a lower box 11 and a cover 12. The lower box 11 has a placement space inside and an opening on at least one side. The cover 12 covers the opening. The lower box 11 also has a first welding port 111, and a first limiting structure 1111 is provided at the first welding port 111. The placement space is used to insert the battery pack 3, and the first limiting structure 1111 is used to abut against one end of the battery pack 3. The outer surface of the lower box 11 has a mounting part 113, and a second limiting structure 1131 is provided on the mounting part 113. The base frame 2 has a support part 21, which is rotatably connected to the mounting part 113. A third limiting structure 211 is provided on the support part 21, which is used to cooperate with the second limiting structure 1131 to restrict the relative rotation between the support part 21 and the mounting part 113.

[0035] In the above structure, the battery pack welding positioning fixture includes a housing 1 and a base frame 2. The housing 1 includes a lower box 11 and a cover 12. The placement space inside the lower box 11 is used to insert the battery pack 3. The cover 12 at the opening is designed to facilitate the insertion and removal of the battery pack 3. By abutting one end of the battery pack 3 with the first limiting structure 1111, the battery pack 3 can be quickly and accurately positioned during welding without the need for repeated manual adjustments to the position of the battery pack 3, thus simplifying the preparation work before welding. The support part 21 of the base frame 2 is connected to the mounting part 113 of the housing 1. The rotatable connection, combined with the use of the second limiting structure 1131 and the third limiting structure 211, facilitates the rotation of the housing 1 to switch welding angles during the welding process. This avoids the tedious manual flipping of the battery pack 3 in traditional welding, reduces positioning errors and time waste caused by manual operation, greatly shortens the positioning time, and improves welding efficiency. At the same time, the fixing effect of the first limiting structure 1111 ensures the stability of the battery pack 3 during the welding process, reduces welding defects caused by the shaking or positional displacement of the battery pack 3, and thus improves the welding quality.

[0036] In one embodiment, the lower housing 11 is further provided with a locking assembly 114, which is used to lock the cover 12 to the lower housing 11.

[0037] In the above structure, the locking component 114 can take various forms, such as a latch, bolt, or snap-fit. In this embodiment, a latch structure is preferred. Through the fixing effect of the locking component 114, the entire housing 1 is more stable during welding, reducing tooling wobbling caused by external vibration or improper operation, and further improving welding quality. The design of the locking component 114 makes fixing and opening the cover 12 simpler and faster, allowing operators to quickly install and remove the battery pack 3, thus improving work efficiency.

[0038] In one embodiment, the locking assembly 114 includes a first fastener 1141 and a second fastener 1142. The first fastener 1141 is disposed on the cover 12, and the second fastener 1142 is disposed on the outer surface of the lower housing 11. The first fastener 1141 and the second fastener 1142 are fastened together.

[0039] In the above structure, the first fastener 1141 is a locking tongue mounted on the cover 12, and the second fastener 1142 is a locking seat mounted on the lower housing 11. The locking tongue and the locking seat cooperate to firmly fix the cover 12 to the lower housing 11. The locking assembly 114, through the cooperation of the locking tongue and the locking seat, firmly fixes the cover 12 to the lower housing 11, ensuring that the cover 12 will not loosen during the welding process, thereby avoiding the battery pack 3 position shift or welding defects caused by the cover 12 loosening.

[0040] In one embodiment, the mounting part 113 includes a first rotating shaft 1132 and a second rotating shaft 1133, which are respectively disposed on opposite sides of the outer surface of the lower housing 11; the support part 21 includes a first groove 212 and a second groove 213, with the first rotating shaft 1132 located in the first groove 212 and the second rotating shaft 1133 disposed in the second groove 213. The first rotating shaft 1132 can rotate relative to the first groove 212, and the second rotating shaft 1133 can rotate relative to the second groove 213.

[0041] In the above structure, the first rotating shaft 1132 and the second rotating shaft 1133 are respectively located on opposite sides of the outer surface of the housing, ensuring the balance and stability of the lower housing 11 on the support 21, and also facilitating installation and disassembly. The support 21 is provided with a first groove 212 and a second groove 213, which respectively accommodate the first rotating shaft 1132 and the second rotating shaft 1133. Both the first groove 212 and the second groove 213 are semi-circular grooves, allowing the first rotating shaft 1132 and the second rotating shaft 1133 to rotate freely within the semi-circular grooves. The first rotating shaft 1132 and the second rotating shaft 1133 are located within the first groove 212 and the second groove 213, respectively, allowing the lower housing 11 to rotate freely relative to the support 21. This enables the lower housing 11 to quickly switch welding angles during welding, achieving multi-angle welding and improving welding efficiency.

[0042] In one embodiment, the second limiting structure 1131 includes a plurality of first insertion segments and a plurality of second insertion segments. The plurality of first insertion segments are arranged circumferentially around the first rotation axis 1132, and the plurality of second insertion segments are arranged circumferentially around the second rotation axis 1133. The third limiting structure 211 includes a first slot 2121 and a second slot 2131. The first slot 2121 is disposed on the bottom wall of the first groove 212, and one of the first insertion segments is inserted into the first slot 2121. The second slot 2131 is disposed on the bottom wall of the second groove 213, and one of the second insertion segments is inserted into the second slot 2131.

[0043] The first insertion segments are arranged circumferentially around the first rotating shaft 1132, and the second insertion segments are arranged circumferentially around the second rotating shaft 1133. The first and second insertion segments can be protruding structures used to engage with the first slot 2121 or the second slot 2131 to achieve a limiting function. When the lower housing 11 is installed on the support 21, the first insertion segment is inserted into the first slot 2121, or the second insertion segment is inserted into the second slot 2131, thereby restricting the radial movement and circumferential rotation of the first rotating shaft 1132 and the second rotating shaft 1133. The first and second insertion segments, along with the first and second slots 2121 and 2131, cooperate to restrict the radial movement of the first and second rotating shafts 1132 and 1133, ensuring the stability and reliability of the lower housing 11 on the support 21. By using multiple first plug segments to cooperate with the first slot 2121, or using multiple second plug segments to cooperate with the second slot 2131, the housing can be positioned at different angles, meeting the needs of multi-angle welding and improving the flexibility and efficiency of welding.

[0044] In one embodiment, the lower housing 11 is further provided with a second welding port 112, and a fourth limiting structure 1121 is provided at the second welding port 112; the first welding port 111 and the second welding port 112 are located on opposite sides of the lower housing 11, and the second limiting structure 1131 and the fourth limiting structure 1121 are respectively used to abut against the two ends of the battery pack 3.

[0045] The second welding port 112 is located on opposite sides of the lower housing 11, opposite to the first welding port 111, and is used for welding the other end of the battery pack 3. The first welding port 111 and the second welding port 112 are located on opposite sides of the lower housing 11, allowing the tooling to simultaneously weld both ends of the battery pack 3, improving welding efficiency and reducing the number of times the battery pack 3 is flipped during welding. The fourth limiting structure 1121 is located at the second welding port 112, opposite to the second limiting structure 1131, and is used to abut against the other end of the battery pack 3. The fourth limiting structure 1121 cooperates with the second limiting structure 1131 to simultaneously limit the battery pack 3 from both ends, ensuring the battery pack 3 remains stable during welding and reducing welding deviations caused by battery pack 3 shaking.

[0046] In one embodiment, the first limiting structure 1111 includes a first baffle, and the fourth limiting structure 1121 includes a second baffle.

[0047] In the above structure, the first limiting structure 1111 includes a first baffle, which is disposed at the first welding joint 111. The first baffle is used to abut against one end of the battery pack 3 to ensure that the battery pack 3 remains stable during the welding process and prevents it from shifting during welding. The fourth limiting structure 1121 includes a second baffle, which is disposed at the second welding joint 112; the second baffle is used to abut against the other end of the battery pack 3 and cooperates with the first baffle to achieve bidirectional limiting of the battery pack 3. Through the limiting effect of the first baffle and the second baffle, the battery pack 3 can be quickly positioned, reducing the time wasted due to inaccurate positioning and further improving welding efficiency. The first baffle and the second baffle can be fixed on the inner or outer side of the lower housing 11, and the specific position can be adjusted according to the size of the battery pack 3 and the welding process requirements.

[0048] In one embodiment, the base frame 2 includes a bottom frame 22, a first support frame 23 and a second support frame 24. The lower ends of the first support frame 23 and the second support frame 24 are respectively connected to the top of the bottom frame 22. There is a gap between the first support frame 23 and the second support frame 24. The upper ends of the first support frame 23 and the second support frame 24 are provided with support portions 21. The shell 1 is located between the first support frame 23 and the second support frame 24.

[0049] In the above structure, the bottom frame 22 serves as the foundation of the base frame 2, supporting the entire tooling and ensuring its stability. The bottom frame 22 can be designed as a rectangle or other suitable shape to adapt to different installation requirements. The lower ends of the first support frame 23 and the second support frame 24 are connected to the top of the bottom frame 22, forming a stable support structure. A gap is provided between the two support frames to accommodate the housing 1. The support part 21 is located at the upper end of the first support frame 23 and the second support frame 24, supporting and fixing the housing 1. The support part 21 has a groove that cooperates with the rotation axis of the housing 1 to achieve a rotatable connection of the housing 1. The structural design of the bottom frame 22 and the two support frames ensures the stability of the entire tooling and reduces tooling swaying caused by external vibration or improper operation. By providing a groove on the support part 21, the housing 1 can rotate freely relative to the support part 21, enabling multi-angle welding. This design makes the welding process more flexible and allows for quick switching to the required welding angle. The spacing between the first support frame 23 and the second support frame 24 allows the housing 1 to be compactly installed in the base frame 2, saving space and facilitating welding operations for the operator.

[0050] In one embodiment, the bottom frame 22 is provided with a base support 25 at each of the four bottom corners, and the base support 25 is used to detachably connect to the mounting surface.

[0051] In the above structure, the base support 25 is located at the four bottom corners of the bottom frame 22, ensuring that the support points of the entire base frame 2 are evenly distributed, providing stable support, ensuring stability during the welding process, reducing the leakage of welding spatter caused by tooling shaking, further enhancing the safety of welding operations, reducing the risk of injury to operators from welding spatter, and improving the safety of welding operations. The base support 25 is designed as a detachable structure, which facilitates adjustment and replacement according to different installation requirements. The base support 25 can be connected to the mounting surface (such as a workbench, ground, etc.) by bolts, screws, or other fasteners.

[0052] In one embodiment, the bottom frame 22 is set as a rectangular frame, and the first support frame 23 and the second support frame 24 are both set as triangular frames.

[0053] In the above structure, the bottom frame 22 adopts a rectangular frame structure. This design has good stability and load-bearing capacity, and can evenly distribute the weight of the tooling, ensuring the stability of the entire tooling on the mounting surface. The size of the rectangular frame can be adjusted according to the overall size of the tooling and usage requirements to adapt to different installation environments and working scenarios. The first support frame 23 and the second support frame 24 both adopt a triangular frame structure. The triangular structure has high stability and resistance to deformation, and can effectively bear the weight of the housing 1 and the battery pack 3, ensuring the stability of the tooling during the welding process. The lower ends of the first support frame 23 and the second support frame 24 are respectively connected to the top of the bottom frame 22 to form a stable support structure. A gap is provided between the two support frames to accommodate the housing 1.

[0054] In one embodiment, the housing 1 is provided with a first abutment 13, a second abutment 14, a third abutment 15 and a fourth abutment 16 on the side facing the first support frame 23 or the second support frame 24. The first abutment 13 and the second abutment 14 abut against the two sides of the first support frame 23 or the second support frame 24 respectively; or the third abutment 15 and the fourth abutment 16 abut against the two sides of the first support frame 23 or the second support frame 24 respectively.

[0055] In the above structure, the housing 1 has four abutment members on the side facing the first support frame 23 or the second support frame 24, namely the first abutment member 13, the second abutment member 14, the third abutment member 15, and the fourth abutment member 16. The first abutment member 13, the second abutment member 14, the third abutment member 15, and the fourth abutment member 16 can be protrusions, pads, or other suitable structures for abutting against both sides of the support frame. The first abutment member 13 and the second abutment member 14 abut against both sides of the first support frame 23 or the second support frame 24 respectively; or the third abutment member 15 and the fourth abutment member 16 abut against both sides of the first support frame 23 or the second support frame 24 respectively. The abutment member 13 and the second abutment member 14 can be selected according to actual needs to achieve optimal stability and ease of operation. For example, the first abutting member 13 and the second abutting member 14 are spaced apart at a 60° angle to form a first included angle; the third abutting member 15 and the fourth abutting member 16 are spaced apart at a 60° angle to form a second included angle. The upper included angle of the first support frame or the second support frame is 60°, and the openings between the first included angle and the second included angle are opposite. The stable support of the housing 1 by the first abutting member 13, the second abutting member 14, or the third abutting member 15 and the fourth abutting member 16 allows the housing 1 to be quickly switched to the required welding angle, reducing the time wasted due to angle adjustment and further improving the welding speed and overall production capacity. At the same time, it ensures the rapid positioning of the housing 1 on the support frame, reducing the time wasted due to inaccurate positioning and significantly improving welding efficiency.

[0056] The specific welding steps of the battery pack welding positioning fixture are as follows: confirm the installation position of the base frame 2, determine the welding starting position through the array pattern edited by the laser equipment, fix the bottom support 25 of the bottom frame 22 of the base frame 2 with screws to ensure that the base frame 2 is stably installed on the workbench (or ground and other welding operation planes); open the cover 12 of the housing 1, place the battery pack 3 into the placement space of the lower box 11, so that one end of the battery pack 3 abuts against the first baffle of the first limiting structure 1111, and the other end abuts against the second baffle of the fourth limiting structure 1121; close the cover 12, and lock the cover 12 to the lower box 11 through the first fastener 1141 and the second fastener 1142 of the locking assembly 114; place the first rotating shaft 1132 and the second rotating shaft 1133 of the mounting part 113 of the housing 1 on the base frame 2. Within the first groove 212 and the second groove 213 of the support part 21 of the frame 2, adjust the positions of the first rotating shaft 1132 and the second rotating shaft 1133 so that the first plug-in section is inserted into the first slot 2121 or the second plug-in section is inserted into the second slot 2131. Use the limiting structure to restrict the relative rotation between the housing 1 and the base frame 2 to ensure that the housing 1 is horizontal and stable. At this time, the first welding port 111 faces upward. Place the connecting piece into the first welding port 111 and perform the welding operation. After welding one end, adjust the angle of the housing 1 as needed. The rotation of the first rotating shaft 1132 and the second rotating shaft 1133 within the grooves realizes the flipping or angle adjustment of the housing 1. At this time, the second welding port 112 faces upward. Place the connecting piece into the second welding port 112 and perform the welding operation again until the welding of the battery pack 3 is completed.

[0057] In the technical solution of this application, the housing 1 includes a lower box 11 and a cover 12. The internal space of the lower box 11 is used to place the battery pack 3. The cover 12 at the opening is designed to facilitate the insertion and removal of the battery pack 3. By abutting one end of the battery pack 3 through the first limiting structure 1111, the battery pack 3 can be quickly and accurately positioned during welding without the need for repeated manual adjustment of the position of the battery pack 3, thus simplifying the preparation work before welding. The support part 21 of the base frame 2 is rotatably connected to the mounting part 113 of the housing 1. With the use of the second limiting structure 1131 and the third limiting structure 211, it is convenient to rotate the housing 1 to switch the welding angle during welding, avoiding the tedious operation of manually flipping the battery pack 3 in traditional welding, reducing the positioning error and time waste caused by manual operation, greatly shortening the positioning time and improving the welding efficiency. At the same time, the fixing effect of the first limiting structure 1111 ensures the stability of the battery pack 3 during welding, reducing welding defects caused by the shaking or positional displacement of the battery pack 3, thereby improving the welding quality.

[0058] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery pack welding positioning tool characterized by, The utility model relates to a battery pack fixing device, including: The shell includes lower box and lid, the inside of lower box is equipped with the placement space, at least one side of lower box is equipped with the opening, the lid is equipped in opening place, lower box still is equipped with first welding interface, first welding interface is equipped with first limiting structure, the placement space is used for putting into battery pack, first limiting structure is used for with the abutment of one end of battery pack, the outer surface of lower box is equipped with mounting portion, second limiting structure is equipped on mounting portion, The base frame is provided with a supporting portion, and the supporting portion is rotatably connected with the mounting portion. The supporting portion is provided with a third limiting structure for cooperating with the second limiting structure to limit the relative rotation between the supporting portion and the mounting portion.

2. The battery pack welding fixture of claim 1, wherein, The lower box is also provided with a locking assembly for locking the lid and the lower box.

3. The battery pack welding fixture of claim 2, wherein, The locking assembly includes a first fastener and a second fastener. The first fastener is arranged on the lid, and the second fastener is arranged on the outer surface of the lower box. The first fastener and the second fastener are buckled.

4. The battery pack welding fixture of any one of claims 1 to 3, wherein, The mounting portion includes a first rotating shaft and a second rotating shaft, which are respectively arranged on opposite sides of the outer surface of the lower box. The supporting portion includes a first groove and a second groove. The first rotating shaft is located in the first groove, and the second rotating shaft is arranged in the second groove. The first rotating shaft can rotate relative to the first groove, and the second rotating shaft can rotate relative to the second groove.

5. The battery pack welding fixture of claim 4, wherein, The second limiting structure includes a plurality of first plug-in segments and a plurality of second plug-in segments. The plurality of first plug-in segments are arranged around the circumference of the first rotating shaft, and the plurality of second plug-in segments are arranged around the circumference of the second rotating shaft. The third limiting structure includes a first clamping groove and a second clamping groove. One of the first plug-in segments is inserted into the first clamping groove, and one of the second plug-in segments is inserted into the second clamping groove.

6. The battery pack welding fixture of any one of claims 1 to 3, wherein, The lower box is also provided with a second welding interface, and the second welding interface is provided with a fourth limiting structure. The first welding interface and the second welding interface are arranged on opposite sides of the lower box. The second limiting structure and the fourth limiting structure are respectively used for abutting with two ends of the battery pack.

7. The battery pack welding fixture of claim 6, wherein, The first limiting structure includes a first baffle, and the fourth limiting structure includes a second baffle.

8. The battery pack welding fixture of any one of claims 1 to 3, wherein, The base frame includes a bottom frame, a first supporting frame, and a second supporting frame. The lower ends of the first and second supporting frames are respectively connected to the top of the bottom frame. The first and second supporting frames are spaced apart. The upper ends of the first and second supporting frames are provided with the supporting portion. The shell is located between the first and second supporting frames.

9. The battery pack welding fixture of claim 8, wherein, The bottom frame is provided with a bottom support at each corner of the bottom. The bottom support is used for detachable connection with a mounting surface. The bottom frame is arranged as a rectangular frame, and the first support frame and the second support frame are arranged as triangular frames.

10. The battery pack welding fixture of claim 8, wherein, The shell is provided with a first abutting piece, a second abutting piece, a third abutting piece and a fourth abutting piece on one side of the first support frame or the second support frame, and the first abutting piece and the second abutting piece respectively abut two sides of the first support frame or the second support frame; or the third abutting piece and the fourth abutting piece respectively abut two sides of the first support frame or the second support frame.

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