A welding fixture for a bottom shell of a battery swap battery pack box

Abstract

The application relates to the technical field of tool clamps for new energy battery pack production and detection, and particularly discloses a welding clamp for a bottom shell of a battery pack box, which comprises a base, and a positioning mechanism and a fixing mechanism are arranged on the base; the positioning mechanism comprises narrow-end positioning mechanisms, wide-end positioning mechanisms and side positioning mechanisms, the narrow-end positioning mechanisms, the wide-end positioning mechanisms and the side positioning mechanisms are in positioning plug-in cooperation with preset holes on the frame of the bottom shell; the fixing mechanism comprises narrow-end fixing mechanisms, wide-end fixing mechanisms and side fixing mechanisms, the narrow-end fixing mechanisms, the wide-end fixing mechanisms and the side fixing mechanisms clamp and fix the frame of the bottom shell from top to bottom; the narrow-end positioning mechanisms are further matched with the wide-end fixing mechanisms to clamp and fix the bottom shell from both ends, and the side fixing mechanisms are matched to clamp and fix the bottom shell from both sides, so that the welding operation of the bottom shell of the battery pack box meets the requirement of welding machining precision.

Description

Technical Field

[0001] This application relates to the field of tooling and fixture technology for the production and testing of new energy battery packs, and in particular to a welding fixture for the bottom shell of a battery pack housing. Background Technology

[0002] New energy vehicles refer to vehicles that use unconventional power sources or conventional vehicle fuels while employing new onboard power devices. In general, the mainstream energy replenishment methods for new energy vehicles in China include the following three types: plug-in hybrid range-extended electric vehicles, battery swapping electric vehicles, and fast charging electric vehicles.

[0003] In the battery swapping model, the vehicle and battery are separated, enabling battery sharing. This facilitates full lifecycle management of batteries and tiered utilization of batteries, providing a feasible path for the development of the energy storage industry. For car owners, the battery swapping model can significantly shorten recharge time and greatly improve the user experience, giving it an absolute advantage in terms of recharge duration.

[0004] Reference Figure 1 As shown, a battery swapping pack generally includes a bottom shell, one type of which includes a main board 01 and a frame 02 welded around the main board 01. One end of the bottom shell is a wide end, and the opposite end is a narrow end. Both sides connecting the wide end and the narrow end have a bent structure 03, and the bent structure 03 is located close to the narrow end of the bottom shell on the side. The frame 02 is a structural component with a cavity structure, and part of the frame 02 overlaps the main board 01 to form a stacked state.

[0005] The bottom shell of the battery pack for new energy vehicles has high requirements for welding precision. To meet the welding precision requirements of the bottom shell of the battery pack, a welding fixture suitable for welding the bottom shell of the battery pack has been designed. Summary of the Invention

[0006] In order to meet the welding precision requirements of the bottom shell of the battery pack housing for new energy vehicles, this application provides a welding fixture for the bottom shell of the battery pack housing.

[0007] This application provides a welding fixture for the bottom shell of a battery pack casing, which adopts the following technical solution:

[0008] A welding fixture for the bottom shell of a battery swapping pack includes a base for supporting the main board of the bottom shell. A positioning mechanism and a fixing mechanism are arranged on the base along the edge of the bottom shell. The positioning mechanism includes a narrow-end positioning mechanism at the narrow end of the bottom shell, a wide-end positioning mechanism at the wide end of the bottom shell, and a side positioning mechanism at the side edge of the bottom shell. All three positioning mechanisms are located at the edge of the bottom shell. The pre-set holes on the frame form a positioning and insertion fit; the fixing mechanism includes a narrow-end fixing mechanism located at the narrow end of the bottom shell of the battery pack box, a wide-end fixing mechanism located at the wide end of the bottom shell of the battery pack box, and a side fixing mechanism located at the side of the bottom shell of the battery pack box; the narrow-end fixing mechanism, the wide-end fixing mechanism, and the side fixing mechanism all clamp and fix the frame of the bottom shell of the box from above and below; the narrow-end positioning mechanism also cooperates with the wide-end fixing mechanism to clamp and fix the bottom shell of the box from both ends, and the side fixing mechanism cooperates to clamp and fix the bottom shell of the box from both sides.

[0009] By adopting the above technical solution, a narrow-end positioning mechanism and a narrow-end fixing mechanism are arranged at the narrow end of the bottom shell of the housing, and a wide-end positioning mechanism and a wide-end fixing mechanism are arranged at the wide end of the bottom shell of the housing. Side positioning mechanisms and side fixing mechanisms are arranged on both sides of the bottom shell of the housing. The positioning mechanism is used to position and install the bottom shell of the housing, while the fixing mechanism is used to fix and install the bottom shell of the housing. On this basis, the narrow-end positioning mechanism and the wide-end fixing mechanism work together to clamp and fix the bottom shell of the housing from both ends, and the side fixing mechanism clamps and fixes the bottom shell of the housing from both sides, so as to meet the welding precision requirements of the bottom shell welding operation of the battery pack housing of new energy vehicles.

[0010] Preferably, the wide end fixing mechanism includes a wide end face fixing component, the wide end face fixing component includes a wide end face fixing seat mounted on the base, the wide end face fixing seat is provided with a wide end face clamping block, the wide end face clamping block slides on the wide end face fixing seat and abuts against the frame at the wide end of the bottom shell of the box.

[0011] By adopting the above technical solution, the wide-end clamping block slides and abuts against the frame at the wide end of the bottom shell of the box, which not only achieves the purpose of clamping and fixing, but also facilitates the hoisting and erection of the bottom shell of the box. The structure is simple and easy to implement and adjust.

[0012] Preferably, the narrow end positioning mechanism includes a narrow end face positioning component, which includes a narrow end face positioning seat mounted on the base. A narrow end face positioning pin is slidably disposed on the narrow end face positioning seat, and the narrow end face positioning pin and the narrow end face positioning seat form a rotational engagement. The narrow end face positioning pin slides along the narrow end face positioning seat and is inserted into a preset hole on the frame of the bottom shell of the housing and is rotated and locked. The narrow end face positioning pin is provided with two sets of bidirectional pin heads, which are arranged at intervals along the axial direction of the narrow end face positioning pin. The pin heads of the two sets of bidirectional pin heads face opposite directions, and the bidirectional pin heads abut against the inner wall of the inner cavity of the frame at the narrow end of the bottom shell of the housing in the width direction.

[0013] By adopting the above technical solution, the narrow end face positioning component, which consists of a narrow end face positioning seat and a narrow end face positioning pin, can not only play the role of positioning and installation, but also play the role of auxiliary fixing by using two sets of bidirectional pins. That is, the purpose of limiting is achieved by using the cooperation relationship between the two sets of bidirectional pins and the frame at the narrow end of the bottom shell of the box.

[0014] Preferably, the narrow-end fixing mechanism, the wide-end fixing mechanism, and the side fixing mechanism all include an upper fixing clamping assembly. The upper fixing clamping assembly includes an upper fixing clamping block and an upper fixing flipping member that flips and drives the upper fixing clamping block to press down on the frame of the bottom shell of the enclosure. The upper fixing clamping block presses down on the upper top surface at the position where the frame of the bottom shell of the enclosure overlaps with the main board of the bottom shell of the enclosure. The upper fixing clamping block is provided with an upper insertion positioning pin for inserting into a preset hole on the frame of the bottom shell of the enclosure. The upper fixing clamping block is also provided with a detection sensor for detecting the flatness of the upper surface of the frame of the bottom shell of the enclosure.

[0015] By adopting the above technical solution, the upper fixed clamping block and the upper insertion positioning pin are jointly driven to rotate by the upper fixed flipping component, so as to simultaneously achieve the purpose of pressing down clamping and fixing and insertion positioning. Moreover, the drive structure is compact, which helps to simplify the structure and reduce the additional space occupation. On this basis, the edge of the bottom shell and the main board of the bottom shell are specifically pressed down and fixed at the overlapping position, which helps to improve the structural and connection stability of the main board and edge of the bottom shell during the welding process.

[0016] Preferably, the narrow-end fixing mechanism, the wide-end fixing mechanism, and the side fixing mechanism all include a lower support clamping component used in conjunction with the upper fixing clamping component. The lower support clamping component includes a first support block and a second support block. The first support block is supported on the lower bottom surface of the frame of the bottom shell of the enclosure, and the second support block is supported on the lower bottom surface at the overlapping position of the frame of the bottom shell of the enclosure and the main board of the bottom shell of the enclosure. The second support block is disposed opposite to the upper fixing clamping block.

[0017] By adopting the above technical solution, the first support block is used to support the frame of the bottom shell of the enclosure, while the second support block is used to support the overlapping position of the frame of the bottom shell of the enclosure and the main board, so as to further improve the structural and connection stability of the main board and the frame of the bottom shell of the enclosure during the welding process.

[0018] Preferably, a corner positioning support mechanism is provided on the base at the top corner of the bottom shell of the box. The corner positioning support mechanism includes a corner positioning support member installed on the base. The corner positioning support member is driven to connect a corner positioning block and a corner support block. The corner positioning block is inserted into a preset hole in the bottom surface of the frame of the bottom shell of the box under the drive of the corner positioning support member, and the corner support block is supported on the bottom surface of the frame of the bottom shell of the box under the drive of the corner positioning support member.

[0019] By adopting the above technical solution, the top corner positioning support component drives the top corner positioning block and the top corner support block to move simultaneously, so that the top corner positioning block is positioned and inserted into the preset hole on the frame of the bottom shell of the box, and the top corner support block is supported on the frame of the bottom shell of the box, so as to achieve the purpose of top clamping and fixing and insertion positioning at the same time. Moreover, the driving structure is compact, which helps to simplify the structure and reduce the additional space occupation.

[0020] Preferably, the top corner positioning support mechanism is equipped with a top corner auxiliary fixing mechanism. The top corner auxiliary fixing mechanism includes a top corner fixing block and a top corner fixing flipping component that drives the top corner fixing block to press down on the top corner of the bottom shell of the box. The top corner fixing block also presses down on the upper fixing clamping block at the end of the bottom shell of the box and the upper fixing clamping block at the side of the bottom shell of the box.

[0021] By adopting the above technical solution, the top corner fixing block flips and presses down on the upper fixing clamping block at the end of the bottom shell of the box and the upper fixing clamping block on the side under the driving action of the top corner fixing flipping component, thereby achieving the purpose of simultaneously assisting in fixing the upper fixing clamping components at both the side and the end.

[0022] Preferably, a bending auxiliary fixing mechanism is provided on the base at the side bend of the bottom shell of the box. The bending auxiliary fixing mechanism includes a bending fixing block and a bending fixing flipping component for flipping and driving the bending fixing block to press down on the bend of the frame of the box base and the main board of the bottom shell of the box.

[0023] By adopting the above technical solution, the bending auxiliary fixing mechanism, which consists of a bending and fixing flipping component and a bending and fixing block, plays the role of pressing and fixing at the side bending point of the bottom shell of the box.

[0024] Preferably, the side fixing mechanism further includes a side auxiliary fixing component, which includes a side auxiliary fixing seat mounted on the base and a side auxiliary fixing block slidably disposed on the side auxiliary fixing seat, and the side auxiliary fixing block is laterally pressed against the edge end face of the bottom shell of the box.

[0025] By adopting the above technical solution, the side auxiliary fixing block slides and abuts against the edge face of the bottom shell of the box, which not only achieves the purpose of clamping and fixing, but also facilitates the hoisting and erection of the bottom shell of the box. The structure is simple and easy to implement and adjust.

[0026] Preferably, an auxiliary support is detachably provided on the base, and the auxiliary support is mounted between the base and the main board of the bottom shell of the housing.

[0027] By adopting the above technical solution, the auxiliary support component plays the role of supporting and fixing the bottom shell of the box, and the operator can adjust the specific position of the auxiliary support component on the base according to the needs.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. The positioning mechanism is used to position and install the bottom shell of the housing, while the fixing mechanism is used to fix and install the bottom shell of the housing. Based on this, the narrow-end positioning mechanism and the wide-end fixing mechanism are used together to clamp and fix the bottom shell of the housing from both ends. At the same time, the side fixing mechanism is used to clamp and fix the bottom shell of the housing from both sides to meet the welding precision requirements of the welding operation of the bottom shell of the battery pack housing of new energy vehicles.

[0030] 2. The narrow end face positioning assembly, consisting of a narrow end face positioning seat and a narrow end face positioning pin, can achieve both positioning and installation, and can also achieve the purpose of limiting movement by using the cooperation between the two sets of bidirectional pin heads and the frame at the narrow end of the bottom shell of the box.

[0031] 3. The top corner auxiliary fixing mechanism is used to press down and fix the upper fixing clamping block at the end of the bottom shell of the box and the upper fixing clamping block on the side, thereby achieving the purpose of simultaneously assisting in fixing the upper fixing clamping components at both the side and the end.

[0032] 4. The bending-assisted fixing mechanism is used to further assist in pressing and fixing at the side bend of the bottom shell of the box. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the bottom shell of the battery pack housing in an embodiment of this application;

[0034] Figure 2This is a schematic diagram of the overall structure of the welding fixture for the bottom shell of the battery pack in this embodiment of the application (only the structure of one side of the bottom shell is shown in the figure, and the same structure on the other side is omitted).

[0035] Figure 3 This is a schematic diagram mainly used to show the positioning and fixing mechanisms (the same mechanisms below the bottom shell of the box are omitted).

[0036] Figure 4 This is a schematic diagram of the mechanism, mainly used to show the upper fixed clamping component and the lower support clamping component;

[0037] Figure 5 This is a structural schematic diagram mainly used to demonstrate the narrow end face positioning component.

[0038] Explanation of reference numerals in the attached drawings: 01, Main board; 02, Frame; 03, Bending structure; 1, Base; 11, Auxiliary support component; 21, Narrow end positioning mechanism; 22, Wide end positioning mechanism; 23, Side positioning mechanism; 31, Narrow end fixing mechanism; 32, Wide end fixing mechanism; 33, Side fixing mechanism; 4, Upper fixing clamping assembly; 41, Upper fixing flipping component; 42, Upper fixing clamping block; 43. Upper insertion positioning pin; 44. Detection sensor; 5. Lower support clamping assembly; 51. First support block; 52. Second support block; 6. Wide end face fixing assembly; 61. Wide end face fixing seat; 62. Wide end face clamping block; 7. Narrow end face positioning assembly; 71. Narrow end face positioning seat; 72. Narrow end face positioning pin; 721. Bidirectional pin head; 81. Top corner positioning support mechanism; 811. Top corner positioning support component; 812. Top corner positioning block; 813. Top corner support block; 82. Top corner auxiliary fixing mechanism; 821. Top corner fixing flip component; 822. Top corner fixing block; 91. Bending auxiliary fixing mechanism; 911. Bending fixing block; 912. Bending fixing flip component; 92. Lateral auxiliary fixing assembly; 921. Lateral auxiliary fixing seat; 922. Lateral auxiliary fixing block. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0040] This application discloses a welding fixture for the bottom shell of a battery pack casing.

[0041] Reference Figure 1 and Figure 2As shown, a welding fixture for the bottom shell of a battery swapping pack includes a horizontally arranged base 1. The base 1 can be welded from steel profiles and sheet metal. The base 1 supports the bottom surface of the main board 01 of the bottom shell to support and fix the bottom shell of the battery swapping pack. A positioning mechanism and a fixing mechanism are arranged on the base 1 along the edge of the bottom shell. The positioning mechanism is used to achieve precise positioning and installation of the bottom shell, and the fixing mechanism is used to achieve stable clamping and fixing of the bottom shell.

[0042] Reference Figure 2 and Figure 3 As shown, the positioning mechanism includes a narrow-end positioning mechanism 21, a wide-end positioning mechanism 22, and two sets of side positioning mechanisms 23. The narrow-end positioning mechanism 21 is located at the narrow end of the bottom shell of the battery pack housing, the wide-end positioning mechanism 22 is located at the wide end of the bottom shell of the battery pack housing, and the two sets of side positioning mechanisms 23 are located on both sides of the bottom shell of the battery pack housing. The narrow-end positioning mechanism 21, the wide-end positioning mechanism 22, and the two sets of side positioning mechanisms 23 all form a positioning insertion fit with the preset holes on the frame 02 of the bottom shell of the housing, thereby achieving the purpose of precise positioning and installation from both ends and both sides of the bottom shell of the housing.

[0043] Reference Figure 2 and Figure 3 As shown, the fixing mechanism includes a narrow-end fixing mechanism 31, a wide-end fixing mechanism 32, and two sets of side fixing mechanisms 33. The narrow-end fixing mechanism 31 is located at the narrow end of the bottom shell of the battery pack housing, the wide-end fixing mechanism 32 is located at the wide end of the bottom shell, and the two sets of side fixing mechanisms 33 are located on both sides of the bottom shell. The narrow-end fixing mechanism 31, the wide-end fixing mechanism 32, and the side fixing mechanisms 33 all clamp and fix the frame 02 of the bottom shell from above and below. The narrow-end positioning mechanism 21 also cooperates with the wide-end fixing mechanism 32 to clamp and fix the bottom shell from both ends, and the two sets of side fixing mechanisms 33 cooperate to clamp and fix the bottom shell from both sides, thereby achieving the purpose of clamping and fixing the bottom shell from the top and bottom, left and right ends, and front and rear sides.

[0044] Reference Figure 2 and Figure 3 As shown, specifically, in the embodiments of this application, the narrow end fixing mechanism 31, the wide end fixing mechanism 32 and the side fixing mechanism 33 all include an upper fixing clamping component 4, and the narrow end fixing mechanism 31, the wide end fixing mechanism 32 and the side fixing mechanism 33 all include a lower support clamping component 5 used in conjunction with the upper fixing clamping component 4. The upper fixing clamping component 4 and the lower support clamping component 5 cooperate to achieve the purpose of clamping and fixing the bottom shell of the box from the top and bottom.

[0045] Reference Figure 3 and Figure 4As shown, the upper fixed clamping assembly 4 includes an upper fixed clamping block 42 and an upper fixed flipping member 41 that drives the upper fixed clamping block 42 to press down on the frame 02 of the bottom shell of the box. The upper fixed flipping member 41 can be used as a manual, pneumatic or electric flipping cylinder. The upper fixed flipping member 41 is locked and installed on the base 1. The upper fixed clamping block 42 is locked and installed on the flipping arm of the flipping cylinder. Under the driving action of the upper fixed flipping member 41, the upper fixed clamping block 42 flips and presses down on the upper top surface of the frame 02 of the bottom shell of the box and the main board 01 of the bottom shell of the box at the overlapping position.

[0046] Reference Figure 3 and Figure 4 As shown, it should be noted that the upper fixing clamping block 42 is also equipped with a detection sensor 44 and an upper insertion positioning pin 43. In this embodiment, the detection sensor 44 is used to detect the flatness of the upper surface of the frame 02 of the box bottom shell, so that the operator can understand the flatness of the corresponding structural surface during the process of fixing the box bottom shell on the fixture or during the welding operation; while the upper insertion positioning pin 43 is used to be inserted into the preset hole on the frame 02 of the box bottom shell to play a role in precise positioning.

[0047] Reference Figure 3 and Figure 4 As shown, the lower support clamping assembly 5 includes a support base locked on the base 1 or the upper fixed flip member 41. A first support block 51 and a second support block 52 are locked on the support base. The first support block 51 is attached to the lower bottom surface of the frame 02 of the bottom shell of the box, and the second support block 52 is attached to the lower bottom surface of the frame 02 of the bottom shell of the box and the main board 01 of the bottom shell of the box, so as to achieve the purpose of clamping and fixing the bottom shell of the box with the upper fixed clamping block 42.

[0048] It should be noted that the second support block 52 is positioned opposite to the upper fixed clamping block 42 to further improve the structural stability and connection stability at the position where the frame 02 of the bottom shell of the enclosure overlaps with the motherboard 01.

[0049] Reference Figure 2 and Figure 3 As shown, based on the above, the wide end fixing mechanism 32 also includes a wide end face fixing component 6. The wide end face fixing component 6 includes a wide end face fixing seat 61 locked and installed on the base 1. A manual, pneumatic or electric sliding cylinder is locked and installed on the wide end face fixing seat 61. A wide end face clamping block 62 is locked and installed on the telescopic rod of the sliding cylinder. The wide end face clamping block 62 can slide along the wide end face fixing seat 61 under the driving action of the sliding cylinder and abut against the frame 02 at the wide end of the bottom shell of the box.

[0050] Reference Figure 2 and Figure 3As shown, the side fixing mechanism 33 also includes a side auxiliary fixing component 92. The side auxiliary fixing component 92 includes a side auxiliary fixing seat 921 locked and installed on the base 1. A manual, pneumatic or electric sliding cylinder is locked and installed on the side auxiliary fixing seat 921. A side auxiliary fixing block 922 is locked and installed on the telescopic rod of the sliding cylinder. Then, the side auxiliary fixing block 922 can be laterally pressed against the end face of the frame 02 of the bottom shell of the box under the driving action of the side auxiliary fixing seat 921.

[0051] Reference Figure 3 and Figure 5 As shown, the narrow end positioning mechanism 21 also includes a narrow end face positioning component 7. The narrow end face positioning component 7 includes a narrow end face positioning seat 71 locked and installed on the base 1. A narrow end face positioning pin 72 is slidably installed on the narrow end face positioning seat 71, and the narrow end face positioning pin 72 and the narrow end face positioning seat 71 form a rotational engagement. The narrow end face positioning pin 72 can slide along the narrow end face positioning seat 71 and be inserted into a preset hole on the frame 02 of the bottom shell of the box. The purpose of locking rotation is achieved by the locking rod inserted into the narrow end face positioning seat 71 and the narrow end face positioning pin 72.

[0052] Reference Figure 3 and Figure 5 More importantly, the narrow end face positioning pin 72 is provided with two sets of bidirectional pins 721. The two sets of bidirectional pins 721 are arranged at intervals along the axial direction of the narrow end face positioning pin 72, and the pins of the two sets of bidirectional pins 721 face opposite directions, one set vertically upward and the other set vertically downward. The spacing of the bidirectional pins 721 is adapted to the width of the inner cavity of the frame 02 at the narrow end of the bottom shell of the box. When the two sets of bidirectional pins 721 are inserted into the preset holes, the two sets of bidirectional pins 721 abut against the two inner walls of the inner cavity of the frame 02 at the narrow end of the bottom shell of the box, respectively, in the width direction. In specific operation, first insert one set of bidirectional pins 721 into the preset hole, then rotate the narrow end face positioning pin 72 so that the other set of bidirectional pins 721 is also inserted into the preset hole. Then rotate the narrow end face positioning pin 72 in the opposite direction so that the two sets of bidirectional pins 721 abut against the two inner walls of the inner cavity of the frame 02, thereby achieving the two purposes of positioning and insertion and auxiliary limiting and fixing.

[0053] Reference Figure 2 and Figure 3 As shown, in addition, in this embodiment of the application, in order to further improve the fixing stability and accuracy of the bottom shell of the box, a top corner positioning support mechanism 81 is also arranged on the base 1. The top corner positioning support mechanism 81 is located at the top corner of the bottom shell of the box. The top corner positioning support mechanism 81 plays the role of support and positioning. The top corner positioning support mechanism 81 is also equipped with a top corner auxiliary fixing mechanism 82, which plays the role of pressing down. That is, the top corner positioning support mechanism 81 and the top corner auxiliary fixing mechanism 82 cooperate to achieve the purpose of clamping, fixing and positioning from top to bottom.

[0054] Reference Figure 2 and Figure 3 As shown, specifically, in this embodiment of the application, the apex positioning support mechanism 81 includes an apex positioning support 811 mounted on the base 1. A manual, pneumatic, or electric sliding cylinder can also be used as the apex positioning support 811. An apex positioning block 812 and an apex support block 813 are connected to the telescopic rod of the apex positioning support 811. The apex positioning block 812 can be inserted into the preset hole on the bottom surface of the frame 02 of the bottom shell of the box under the drive of the apex positioning support 811, and the apex support block 813 is supported on the bottom surface of the frame 02 of the bottom shell of the box under the drive of the apex positioning support 811.

[0055] Reference Figure 2 and Figure 3 As shown, the top corner auxiliary fixing mechanism 82 includes a top corner fixing block 822 and a top corner fixing flipping member 821 that presses down the top corner of the bottom shell of the box. Similarly, a manual, pneumatic or electric flipping cylinder can be used as the top corner auxiliary fixing mechanism 82. The top corner fixing block 822 is locked on the flipping arm of the flipping cylinder. Then, under the driving action of the top corner fixing flipping member 821, the top corner fixing block 822 can simultaneously press down on the upper fixing clamping block 42 at the end of the bottom shell of the box and the upper fixing clamping block 42 at the side of the bottom shell of the box.

[0056] Reference Figure 2 and Figure 3 As shown, a bending auxiliary fixing mechanism 91 is also locked and installed on the side bend of the bottom shell of the base 1. The bending auxiliary fixing mechanism 91 includes a bending fixing block 911 and a bending fixing flipping part 912 for flipping and driving the bending fixing block 911 to press down on the bend of the frame 02 of the base 1 and the main board 01 of the bottom shell of the box. Similarly, a manual, pneumatic or electric flipping cylinder can be used as the bending fixing flipping part 912, and the bending fixing block 911 is locked and installed on the flipping arm of the flipping cylinder.

[0057] Reference Figure 2 and Figure 3 As shown, an auxiliary support 11 is also locked on the base 1. The auxiliary support 11 is vertically supported between the base 1 and the main board 01 of the bottom shell of the box. The auxiliary support 11 is a rod structure, and the operator can adjust the specific position of the auxiliary support 11 on the base 1 as needed.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A welding fixture for the bottom shell of a battery swapping pack, characterized in that: It includes a base (1), which is used to support the main board (01) of the bottom shell of the battery pack box. The base (1) is provided with a positioning mechanism and a fixing mechanism along the edge of the bottom shell of the battery pack box. The positioning mechanism includes a narrow-end positioning mechanism (21) located at the narrow end of the bottom shell of the battery pack housing, a wide-end positioning mechanism (22) located at the wide end of the bottom shell of the battery pack housing, and a side positioning mechanism (23) located at the side of the bottom shell of the battery pack housing; the narrow-end positioning mechanism (21), the wide-end positioning mechanism (22) and the side positioning mechanism (23) are all positioned and inserted into the preset holes on the frame (02) of the bottom shell of the housing. The fixing mechanism includes a narrow end fixing mechanism (31) located at the narrow end of the bottom shell of the battery pack, a wide end fixing mechanism (32) located at the wide end of the bottom shell of the battery pack, and a side fixing mechanism (33) located at the side of the bottom shell of the battery pack; the narrow end fixing mechanism (31), the wide end fixing mechanism (32), and the side fixing mechanism (33) all clamp and fix the frame (02) of the bottom shell of the battery pack from above and below. The narrow-end positioning mechanism (21) also cooperates with the wide-end fixing mechanism (32) to clamp and fix the bottom shell of the box from both ends, and the side fixing mechanism (33) cooperates to clamp and fix the bottom shell of the box from both sides; The wide end fixing mechanism (32) includes a wide end face fixing component (6), the wide end face fixing component (6) includes a wide end face fixing seat (61) mounted on the base (1), the wide end face fixing seat (61) is provided with a wide end face clamping block (62), the wide end face clamping block (62) slides on the wide end face fixing seat (61) and abuts against the frame (02) at the wide end of the bottom shell of the box. The narrow end positioning mechanism (21) includes a narrow end face positioning component (7), which includes a narrow end face positioning seat (71) mounted on the base (1). A narrow end face positioning pin (72) is slidably disposed on the narrow end face positioning seat (71), and the narrow end face positioning pin (72) and the narrow end face positioning seat (71) form a rotational engagement. The narrow end face positioning pin (72) slides along the narrow end face positioning seat (71) and is inserted into a preset hole on the frame (02) of the bottom shell of the box and rotates to lock. The narrow end face positioning pin (72) is provided with two sets of bidirectional pins (721). The bidirectional pins (721) are arranged at intervals along the axial direction of the narrow end face positioning pin (72). The pins of the two sets of bidirectional pins (721) face opposite directions, and the bidirectional pins (721) abut against the inner wall of the inner cavity of the frame (02) at the narrow end of the bottom shell of the box in the width direction.

2. The welding fixture for the bottom shell of a battery swapping pack according to claim 1, characterized in that: The narrow end fixing mechanism (31), the wide end fixing mechanism (32) and the side fixing mechanism (33) all include an upper fixing clamping assembly (4). The upper fixing clamping assembly (4) includes an upper fixing clamping block (42) and an upper fixing flipping part (41) that flips the upper fixing clamping block (42) to press down on the frame (02) of the bottom shell of the box. The upper fixing clamping block (42) presses down on the top surface of the frame (02) of the bottom shell of the box and the main board (01) of the bottom shell of the box. The upper fixing clamping block (42) is provided with an upper insertion positioning pin (43) for inserting into a preset hole on the frame (02) of the bottom shell of the box. The upper fixing clamping block (42) is also provided with a detection sensor (44) for detecting the flatness of the upper surface of the frame (02) of the bottom shell of the box.

3. The welding fixture for the bottom shell of a battery swapping pack according to claim 2, characterized in that: The narrow end fixing mechanism (31), the wide end fixing mechanism (32) and the side fixing mechanism (33) all include a lower support clamping assembly (5) used in conjunction with the upper fixing clamping assembly (4). The lower support clamping assembly (5) includes a first support block (51) and a second support block (52). The first support block (51) is supported on the lower bottom surface of the frame (02) of the bottom shell of the box. The second support block (52) is supported on the lower bottom surface at the overlapping position of the frame (02) of the bottom shell of the box and the main board (01) of the bottom shell of the box. The second support block (52) is arranged opposite to the upper fixing clamping block (42).

4. The welding fixture for the bottom shell of a battery pack casing according to claim 2, characterized in that: A corner positioning support mechanism (81) is provided on the base (1) at the top corner of the bottom shell of the box. The corner positioning support mechanism (81) includes a corner positioning support member (811) installed on the base (1). The corner positioning support member (811) is driven to connect a corner positioning block (812) and a corner support block (813). The corner positioning block (812) is inserted into a preset hole on the bottom surface of the frame (02) of the bottom shell of the box under the drive of the corner positioning support member (811), and the corner support block (813) is supported on the bottom surface of the frame (02) of the bottom shell of the box under the drive of the corner positioning support member (811).

5. The welding fixture for the bottom shell of a battery pack casing according to claim 4, characterized in that: The top corner positioning support mechanism (81) is equipped with a top corner auxiliary fixing mechanism (82). The top corner auxiliary fixing mechanism (82) includes a top corner fixing block (822) and a top corner fixing flipping part (821) that drives the top corner fixing block (822) to press down on the top corner of the bottom shell of the box. The top corner fixing block (822) also presses down on the upper fixing clamping block (42) at the end of the bottom shell of the box and the upper fixing clamping block (42) at the side of the bottom shell of the box.

6. The welding fixture for the bottom shell of a battery swapping pack according to claim 1, characterized in that: A bending auxiliary fixing mechanism (91) is provided on the base (1) at the side bend of the bottom shell of the box. The bending auxiliary fixing mechanism (91) includes a bending fixing block (911) and a bending fixing flipping part (912) for flipping and driving the bending fixing block (911) to press down on the bend of the frame (02) of the base (1) of the box and the main board (01) of the bottom shell of the box.

7. The welding fixture for the bottom shell of a battery swapping pack according to claim 1, characterized in that: The side fixing mechanism (33) further includes a side auxiliary fixing component (92), which includes a side auxiliary fixing seat (921) mounted on the base (1) and a side auxiliary fixing block (922) slidably disposed on the side auxiliary fixing seat (921), and the side auxiliary fixing block (922) is laterally pressed against the end face of the frame (02) of the bottom shell of the box.

8. The welding fixture for the bottom shell of a battery pack casing according to claim 1, characterized in that: An auxiliary support (11) is detachably provided on the base (1), and the auxiliary support (11) is supported between the base (1) and the main board (01) of the bottom shell of the box.

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