An inspection fixture for identifying the position and orientation of battery pack housing mounting feet.

Abstract

This utility model discloses an inspection fixture for identifying the position and orientation of mounting feet on a battery pack casing, comprising a main base plate and four bottom positioning components. The four bottom positioning components are located at the four corners of the upper surface of the main base plate, each including two first positioning plates, one second positioning plate, and one positioning latching block. The two first positioning plates are spaced parallel to each other along the length of the main base plate, and the second positioning plate is perpendicularly positioned inside the first positioning plate near the edge of the main base plate. The positioning latching block is installed in different positions within the bottom positioning components along different length directions. During inspection, the battery pack casing is placed flat on the main base plate, the second positioning plate latches onto the casing, and the first positioning plates and positioning latching blocks latch onto the mounting feet, enabling inspection of the X, Y, and Z axis directions and positions of the mounting feet. This utility model can replace manual measurement, simplify operation, improve inspection efficiency, avoid visual misjudgment, and thus prevent batches of defective products from flowing into the next process.

Description

Technical Field

[0001] This utility model relates to the field of battery pack inspection technology, specifically, it mainly relates to an inspection fixture for identifying the position and orientation of the mounting feet of a battery pack housing. Background Technology

[0002] During the battery pack assembly process, two mounting feet need to be welded to both ends of the housing to form the battery pack housing. After welding, multiple individual batteries are installed into the battery pack housing to form the battery pack. Then, the mounting feet are used to assemble and fix the battery pack to other components, providing power to them. As a key structural component for assembling the battery pack to other components, the correctness of the welding position and orientation of the mounting feet directly affects the overall efficiency of subsequent battery pack assembly.

[0003] like Figure 1 As shown, Figure 1 This is a structural diagram of the battery pack housing. The battery pack housing includes a housing and two mounting feet, which are welded to both ends of the housing. Each mounting foot has two locking interfaces on its outer edge away from the housing; one interface is near the end of the mounting foot, and the other is near the middle. In other words, the two locking interfaces on the mounting feet are asymmetrically distributed about the X-axis. The housing has a bottom wall and four side walls. One side wall along the width direction has multiple insertion holes, and each mounting foot has an insertion interface at one of its four corners.

[0004] Because the two locking interfaces on the mounting feet are asymmetrically distributed about the X-axis, swapping the welding positions of one mounting foot with the other will cause misalignment of the holes during subsequent battery pack assembly, preventing the battery pack from being installed on other components. Furthermore, when welding the mounting feet, a deviation in the X-axis direction will cause the lateral holes of the battery pack and other components (such as the vehicle chassis) to misalign, resulting in assembly jamming; a deviation in the Y-axis direction will cause the longitudinal installation position of the battery pack to be misaligned with other components; and a height deviation in the Z-axis direction will result in insufficient fit between the battery pack and other components, and will also subject the battery pack to additional torque and shear force when forcibly assembled, significantly reducing connection strength and posing a serious safety hazard.

[0005] However, existing technologies still rely on traditional manual inspection methods, which are difficult to adapt to automated battery pack production processes and are prone to human inspection errors, resulting in defective welded products flowing into the next production stage, seriously affecting the overall efficiency of battery pack production. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an inspection fixture for identifying the position and orientation of the mounting feet of a battery pack housing, thereby solving the problems of inability to inspect in a timely manner during the welding process and low inspection efficiency.

[0007] This utility model discloses an inspection fixture for identifying the position and orientation of the mounting feet of a battery pack housing, comprising: a main base plate and four bottom positioning components; the four bottom positioning components are respectively fixedly installed at the four corners of the upper surface of the main base plate, each bottom positioning component including two first positioning plates, one second positioning plate, and a positioning latching block; the two first positioning plates are spaced apart and parallel along the length of the main base plate, and the second positioning plate is perpendicularly disposed on the inner side of the first positioning plate near the edge of the main base plate; in one of the two bottom positioning components arranged along one length of the main base plate, the positioning latching block is disposed between the two first positioning plates; along the other length of the main base plate... In the two bottom positioning components set in the degree direction, the positioning latch block is located on the outside of the first positioning plate away from the edge of the main base plate; wherein, when checking the position and direction of the mounting feet of the battery pack box, the battery pack box is placed horizontally on the main base plate, the second positioning plate is latched to the box, the first positioning plate and the positioning latch block are latched to the mounting feet, each positioning latch block performs positioning checks on the mounting feet on both sides in the X-axis and Y-axis directions, in each bottom positioning component, the two spaced and parallel first positioning plates perform positioning checks on the mounting feet on both sides in the Y-axis direction, and the second positioning plate performs positioning checks on the mounting feet on both sides in the Z-axis direction.

[0008] According to one embodiment of the present invention, it further includes four positioning brackets and a top horizontal bar; the four positioning brackets are fixedly connected to the edge of the main base plate, and a positioning bracket is provided next to each bottom positioning component; the two ends of the top horizontal bar are respectively installed on the top of the two positioning brackets located in the same width direction, wherein, when the position and direction of the battery pack housing mounting feet are inspected, the top horizontal bar is engaged with multiple aviation insertion holes provided on the housing.

[0009] According to one embodiment of the present invention, each first positioning plate includes a first plate body, and the top of the first plate body is provided with a first limiting protrusion; wherein, when the position and direction of the battery pack housing mounting feet are inspected, the first limiting protrusion provided on the first plate body near the edge of the main bottom plate is engaged in the insertion interface on the mounting feet, and the first limiting protrusions provided on the other first plates body are engaged in the bottom of the mounting feet, and the top of the first plate body is limited and fitted to the bottom wall of the housing along the X-axis direction; in each bottom positioning assembly, the two first limiting protrusions respectively provided on the two parallel first positioning plates perform Y-axis direction positioning inspection on the mounting feet.

[0010] According to one embodiment of the present invention, the positioning card block is adapted to the size of the card interface provided on the mounting foot.

[0011] According to one embodiment of the present invention, the second positioning plate includes a second plate body, and a second limiting protrusion is provided on the outer side of the top of the second plate body near the edge of the main bottom plate. When the position and direction of the battery pack housing mounting feet are inspected, the side wall and bottom wall of the housing along the X-axis are limited within the limiting angle formed between the second plate body and the second limiting protrusion.

[0012] According to one embodiment of the present invention, the positioning bracket is provided with a Z-direction positioning surface parallel to the side wall of the box and two Y-direction positioning surfaces perpendicular to the side wall of the box. The two Y-direction positioning surfaces are arranged parallel to the same side of the Z-direction positioning surface and away from the main bottom plate.

[0013] According to one embodiment of the present invention, the top of the Z-direction positioning surface and the two Y-direction positioning surfaces are further provided with horizontally extending mounting plates.

[0014] According to one embodiment of the present invention, the top horizontal bar includes a horizontal bar body, and two verification pins adapted to the aviation connector are also provided on one side of the horizontal bar body. The two verification pins are distributed at intervals along the length direction of the top horizontal bar, and one verification pin is engaged with an aviation connector.

[0015] According to one embodiment of the present invention, the width of the verification pin is smaller than the width of the aviation insertion hole.

[0016] According to one embodiment of the present invention, one side of the main body of the horizontal bar is provided with an elongated snap-fit ​​groove, the verification pins are spaced apart in the elongated snap-fit ​​groove, and the length of the verification pins is greater than the groove depth of the elongated snap-fit ​​groove.

[0017] The beneficial effects of this application are as follows: Four bottom positioning components are respectively located at the four corners of the main base plate. Among the bottom positioning components arranged along different length directions of the main base plate, the positioning latch blocks are positioned differently relative to the two first positioning plates. That is, through the differentiated installation positions of the positioning latch blocks, it is possible to quickly identify whether one mounting foot has been welded to the position to be welded of another mounting foot, avoiding misalignment of subsequent assembly holes due to incorrect installation positions of the two mounting feet. In the same bottom positioning component, the first limiting protrusions on the two parallel spaced first positioning plates can be latched into the mounting feet and perform positioning checks on the mounting feet in the Y-axis direction, ensuring no offset in the longitudinal installation position. The latching of the second positioning plate with the housing enables height checks on the mounting feet in the Z-axis direction, ensuring the fit between the battery pack housing and the assembly accessories, and preventing additional torque and shearing force generated by forced assembly. The positioning latch blocks on both sides can latch and fix the mounting feet on both sides along the length direction of the housing, further cooperating to complete the positioning check in the X-axis direction, avoiding assembly jamming caused by misalignment of lateral holes. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a structural diagram of the battery pack housing;

[0020] Figure 2 This is a three-dimensional structural diagram of the inspection fixture used to identify the position and orientation of the battery pack housing mounting feet in the embodiment.

[0021] Figure 3 This is a three-dimensional structural diagram of the battery pack housing placed on the inspection fixture in the embodiment.

[0022] Figure 4 This is a three-dimensional structural diagram illustrating the interaction between the bottom positioning component and the main base plate in the embodiment.

[0023] Figure 5 This is a three-dimensional structural diagram illustrating the cooperation between the positioning bracket and the main bottom in the embodiment;

[0024] Figure 6 This is a three-dimensional structural diagram illustrating the cooperation between the top horizontal bar and the positioning bracket on the same side in the embodiment.

[0025] Explanation of reference numerals in the attached figures

[0026] 1. Battery pack housing; 11. Housing; 111. Bottom wall; 112. Side wall; 1121. Aviation insertion hole; 12. Mounting foot; 121. Insertion interface; 122. Card interface;

[0027] 2. Main base plate;

[0028] 3. Bottom positioning component; 31. First positioning plate; 311. First plate body; 312. First limiting protrusion; 32. Second positioning plate; 321. Second plate body; 322. Second limiting protrusion; 323. Limiting angle; 33. Positioning latch block;

[0029] 4. Positioning bracket; 41. Z-axis positioning surface; 42. Y-axis positioning surface; 43. Mounting plate;

[0030] 5. Top horizontal bar; 51. Main body of the horizontal bar; 511. Long strip-shaped snap-fit ​​groove; 52. Verification pin. Detailed Implementation

[0031] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0032] It should be noted that all directional indicators in this utility model embodiment, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish items or operations described with the same technical terminology and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of 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. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this utility model.

[0034] To further understand the utility model's content, features, and effects, the following embodiments are provided, along with detailed descriptions in conjunction with the accompanying drawings:

[0035] like Figure 2 As shown, please review. Figure 1 , Figure 2 This is a three-dimensional structural diagram of the inspection fixture for identifying the position and orientation of the mounting feet of the battery pack housing in this embodiment. This embodiment provides an inspection fixture for identifying the position and orientation of the mounting feet of the battery pack housing. The inspection fixture includes: a main base plate 2 and four bottom positioning components 3; the bottom positioning components 3 can inspect whether the welding position of the mounting feet 12 on the battery pack housing 1 is correct, and achieve three-dimensional positioning inspection along the X, Y, and Z axes, improving inspection efficiency and accuracy, and preventing batches of defective products from flowing into the next process.

[0036] The main base plate 2 is formed by sheet metal bending, which increases strength and improves the flatness of the inspection fixture, ensuring that the positioning deviation will not be caused by the deformation of the main base plate 2 during the inspection process. Its size is adapted to the placement requirements of the conventional battery pack box 1, making it easy for operators to quickly place the battery pack box 1 horizontally on the upper surface.

[0037] Please refer to the following: Figure 3-4 As shown, Figure 3 This is a three-dimensional structural diagram of the battery pack housing placed on the inspection fixture in the embodiment. Figure 4 This is a three-dimensional structural diagram illustrating the interaction between the bottom positioning components and the main base plate in this embodiment. Four bottom positioning components 3 are fixedly installed at the four corners of the upper surface of the main base plate 2, so that during testing, the installation positions of the four bottom positioning components 3 correspond one-to-one with the mounting feet 12 on both sides. Each bottom positioning component 3 includes two first positioning plates 31, one second positioning plate 32, and one positioning latching block 33. The two first positioning plates 31 are spaced apart and parallel along the length of the main base plate 2, and the second positioning plate 32 is perpendicularly positioned on the inner side of the first positioning plate 31 near the edge of the main base plate 2. In two bottom positioning components 3 arranged along one length direction of the main base plate 2, the positioning latching block 33 is located between the two first positioning plates 31. In two bottom positioning components 3 arranged along another length direction of the main base plate 2, the positioning latching block 33 is located on the outer side of the first positioning plate 31 away from the edge of the main base plate 2.

[0038] When inspecting the position and orientation of the mounting feet of the battery pack housing, the battery pack housing 1 is placed horizontally on the main base plate 2. The second positioning plate 32 is engaged with the housing 11, and the first positioning plate 31 and positioning latching block 33 are engaged with the mounting feet 12. At the same time, the positioning latching block 33 on the main base plate 2 performs positioning checks on the mounting feet 12 on both sides in the X and Y axes. In addition, in each bottom positioning assembly 3, two spaced and parallel first positioning plates 31 perform positioning checks on the mounting feet 12 in the Y axis direction.

[0039] In other words, when inspecting the position and orientation of the mounting feet of the battery pack housing, if the welding position of the mounting feet 12 is correct, the positioning latching block 33 can smoothly engage with the latching interface 122 on the mounting feet 12. If the welding of the two mounting feet 12 is incorrect, the positioning latching block 33 will not be able to engage with the latching interface 122 on the mounting feet 12. That is, by differentiating the position of the positioning latching block 33, the welding position of the two mounting feet 12 can be quickly identified. If the mounting feet 12 deviate in the X-axis or Y-axis direction, the positioning latching block 33 will also fail to engage smoothly with the latching interface 122, directly reflecting a problem with the position in the X-axis or Y-axis direction. In each bottom positioning component, the mounting feet 12 are engaged by two spaced-apart first positioning plates 31. If the Y-axis deviation exceeds the allowable range, the mounting feet 12 will not be able to be embedded in the two first positioning plates 31. The second positioning plate 32 performs Z-axis positioning inspection on the mounting feet 12 on both sides of the housing 11. The two opposing second positioning plates 32 on the same side along the width direction of the battery pack housing 1 can be engaged with the side walls 112 of the housing 11. If there is a Z-axis height deviation, the bottom wall 111 of the housing 11 will not be able to fit with the top of the second positioning plate 32, thereby achieving the synchronous completion of the three-way positioning inspection.

[0040] Please review Figure 1 Please refer to them together. Figure 5-6 As shown, Figure 5 This is a three-dimensional structural diagram illustrating the cooperation between the positioning bracket and the main bottom in the embodiment; Figure 6 This is a three-dimensional structural diagram illustrating the cooperation between the top horizontal bar and the positioning bracket on the same side in the embodiment. The inspection fixture also includes four positioning brackets 4 and a top horizontal bar 5; the four positioning brackets 4 are fixedly connected to the edge of the main base plate 2, and each bottom positioning component 3 is provided with a positioning bracket 4. The positioning brackets 4 and the bottom positioning components 3 work together to form multi-dimensional positioning from the top of the housing 11 and the top of the positioning brackets 4; the two ends of the top horizontal bar 5 are respectively installed on the top of the two positioning brackets 4 located in the same width direction. When inspecting the position and direction of the battery pack housing mounting feet, multiple aviation insertion holes 1121 are opened at the same horizontal position of the housing 11, and the top horizontal bar 5 is snapped into the multiple aviation insertion holes 1121. By engaging the top horizontal bar 5 with the aviation connector 1121, the placement orientation of the battery pack housing 1 can be further verified. If the battery pack housing 1 is placed in the wrong direction and there is no corresponding aviation connector 1121 on the other side, the top horizontal bar 5 will not be able to align and engage with the aviation connector 1121. This can supplement the error-proof effect of the bottom positioning component 3 in orientation recognition. At the same time, the battery pack housing 1 is fixed from the side wall 112 near the top of the housing 11 to prevent the battery pack housing 1 from shifting during the inspection process and affecting the results.

[0041] For further details, please review. Figure 1 and 3-4, the first positioning plate 31 includes a first plate body 311, and the top of the first plate body 311 is provided with a first limiting protrusion 312; wherein, when the position and direction of the battery pack housing mounting foot are inspected, the mounting foot 12 is provided with an interface 121 that is adapted to the first limiting protrusion 312 near the edge of the main bottom plate 2, and the first limiting protrusion 312 is snapped into the interface 121, and the other first limiting protrusions 312 provided on the first plate body 311 are snapped into the bottom of the mounting foot 12, and the top of the first plate body 311 is limited and fitted with the bottom wall 111 of the housing 11 along the X-axis direction; in each bottom positioning component 3, the two first limiting protrusions 312 respectively provided on the two parallel first positioning plates 31 perform Y-axis direction positioning inspection on the mounting foot 12.

[0042] The first limiting protrusion 312 is adapted to and snaps into the plug interface 121, forming a dual positioning in the X-axis direction with the first plate 311, further improving the accuracy of X-axis position inspection; at the same time, the two first limiting protrusions 312 can snap into the plug interface 121 on the mounting foot 12, thereby achieving accurate inspection in the Y-axis direction. If the Y-axis direction is offset when the mounting foot 12 is welded, the first limiting protrusions 312 on the same side will not be able to snap into the plug interface 121 at the same time.

[0043] Furthermore, the positioning card block 33 is adapted to the size of the card interface 122 provided on the mounting foot 12.

[0044] The shape of the positioning latch 33 is perfectly matched with the outline of the card interface 122, including the matching of width, depth and corner curvature. If the mounting foot 12 is offset in the X-axis direction or the welding position of one mounting foot 12 is swapped with that of the other mounting foot 12, the positioning latch 33 will not be able to be embedded in the card interface 122. The operator can quickly determine whether the position and orientation of the mounting foot 12 are correct by whether it can be successfully latched, without the need for complicated measurement steps.

[0045] Furthermore, the second positioning plate 32 includes a second plate body 321. The top of the second plate body 321 is provided with a second limiting protrusion 322 on the outer side near the edge of the main base plate 2. When the position and direction of the battery pack housing mounting feet are inspected, the side wall 112 and bottom wall 111 of the housing 11 along the X-axis are limited within the limiting angle 323 formed between the second plate body 321 and the second limiting protrusion 322.

[0046] The limiting angle 323 is a right-angle structure that fits perfectly with the right-angled edges of the side wall 112 and bottom wall 111 of the box 11. If the box 11 is offset in the X-axis direction or has a Z-axis height deviation, the side wall 112 or bottom wall 111 will not fit tightly with the inner wall of the limiting angle 323. This allows for coordinated inspection of the Z-axis and X-axis from the right-angled edges of the box 11, improving the comprehensiveness of the inspection.

[0047] For further details, please review. Figure 5 The positioning bracket 4 is provided with a Z-direction positioning surface 41 parallel to the side wall 112 of the housing 11 and two Y-direction positioning surfaces 42 perpendicular to the side wall 112 of the housing 11. The two Y-direction positioning surfaces 42 are parallel to the same side of the Z-direction positioning surface 41 and are far away from the main base plate 2.

[0048] It should be noted that the Z-axis positioning surface 41 and the Y-axis positioning surface 42 are only reference surfaces for the structure of the testing fixture itself, and are not used for fitting and positioning with the side wall 112 of the housing 11. Their main function is to ensure the verticality and parallelism of the positioning bracket 4 itself, and to ensure that the top horizontal bar 5 can be installed horizontally. Because a gap is reserved between the positioning bracket 4 and the side wall 112, the Z-axis positioning surface 41 and the Y-axis positioning surface 42 do not contact the housing 11. They are only used as reference benchmarks for the processing and assembly of the testing fixture, so as to avoid the top horizontal bar 5 tilting due to the installation deviation of the testing fixture itself, which would affect the snap-fit ​​accuracy with the aviation insertion hole 1121.

[0049] Furthermore, the top of the Z-direction positioning surface 41 and the two Y-direction positioning surfaces 42 are also provided with horizontally extending mounting plates 43.

[0050] The core function of the mounting plate 43 is to install and fix the limiting clamp on the top of the housing 11 to limit the flatness of the top of the housing 11, rather than supporting the top horizontal bar 5. After the battery pack housing 1 is placed in place, the upper surface of the mounting plate 43 is aligned with the top of the housing 11. If the housing 11 has a flatness defect due to deviations in the X-axis, Y-axis or Z-axis, there will be a significant gap between the limiting clamp on the mounting plate 43 and the top of the housing 11, or the mounting plate 43 may not be able to fit stably with the limiting clamp due to the protrusion of the top of the housing 11. This can directly reflect the flatness problem of the top of the housing 11. This design fills the loophole in the traditional inspection that "only focuses on the position of the mounting feet and ignores the flatness of the top of the housing". The flatness of the top of the housing 11 directly affects the installation accuracy of the cells inside the battery pack. This design avoids the misalignment of the cells due to unevenness of the top. At the same time, the mounting plate 43 and the positioning bracket 4 are welded and fixed to ensure that their position is stable and does not shift during the inspection operation, thus ensuring the consistency of flatness detection.

[0051] For further details, please review. Figure 6 The top horizontal bar 5 includes a horizontal bar body 51. On the side of the horizontal bar body 51 facing the positioning bracket 4, there are two verification pins 52 that are adapted to the aviation plug hole 1121. The two verification pins 52 are distributed at intervals along the length direction of the top horizontal bar 5, and one verification pin 52 is engaged with one aviation plug hole 1121.

[0052] Among them, the two verification pins 52 correspond to the two aviation connectors 1121 respectively, forming a two-point positioning. Compared with a single pin, it can more accurately check the orientation of the box and the position of the Y-axis. If the orientation of the box is incorrect or the Y-axis offset exceeds the allowable range, the two verification pins 52 will not be able to be engaged in the corresponding aviation connectors 1121 at the same time, further improving the accuracy of orientation recognition. Moreover, since the positioning bracket 4 does not contact the side wall 112, it will not restrict the placement position of the battery pack box 11, ensuring that the cooperation between the verification pins 52 and the aviation connectors 1121 only reflects the position and orientation of the box itself.

[0053] Furthermore, the width of the verification pin 52 is smaller than the width of the aviation connector 1121. This slight gap is designed to prevent the verification pin 52 from failing to engage due to machining errors in the aviation connector 1121 or slight deformation of the housing, while also ensuring the gap remains within a reasonable range. If the housing's Y-axis offset exceeds this gap, it will still fail to engage smoothly. This balances inspection accuracy with compatibility for actual use, avoiding overly stringent fits that could lead to misjudgments.

[0054] Furthermore, the side of the horizontal bar body 51 facing the positioning bracket 4 is provided with an elongated snap-fit ​​groove 511. Verification pins 52 are spaced apart within the elongated snap-fit ​​groove 511, and the length of the verification pins 52 is greater than the depth of the elongated snap-fit ​​groove 511. The elongated snap-fit ​​groove 511 serves to fix and guide the verification pins 52, ensuring that the verification pins 52 extend horizontally in a direction perpendicular to the horizontal bar body 51, preventing the verification pins 52 from tilting. The design that the length of the verification pins 52 is greater than the groove depth allows the end of the verification pins 52 to be fully inserted into the mounting hole 1121, thereby improving snap-fit ​​stability and preventing the verification pins 52 from falling out of the mounting hole 1121 due to slight collisions during inspection. This better ensures the correct positioning and inspection direction of the battery pack housing mounting feet.

[0055] In summary, the inspection fixture in this embodiment achieves simultaneous inspection of the welding position between the battery pack housing and the mounting feet along the X, Y, and Z axes through the bottom positioning component. Combined with the mounting plate's limitation on the flatness of the housing top and the auxiliary limiting by the top crossbar and positioning bracket, it covers the full-dimensional inspection of the mounting foot position, orientation, and housing flatness. Secondly, through the differentiated setting of the positioning clips and the cooperation of the verification pins and mounting holes, it forms multi-directional error prevention, avoiding reverse welding of the mounting feet or incorrect placement of the housing. This effectively prevents batches of defective products from flowing into the next process during welding production, ensuring the smoothness and safety of subsequent battery pack housing assembly.

[0056] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. An inspection fixture for identifying the position and orientation of mounting feet on a battery pack housing, characterized in that, include: A main base plate (2) and four bottom positioning components (3); the four bottom positioning components (3) are respectively fixedly installed at the four corners of the upper surface of the main base plate (2). Each bottom positioning component (3) includes two first positioning plates (31), one second positioning plate (32), and one positioning latching block (33). The two first positioning plates (31) are spaced apart and parallel along the length of the main base plate (2). The second positioning plate (32) is perpendicularly disposed on the inner side of the first positioning plate (31) near the edge of the main base plate (2). Among the two bottom positioning components (3) arranged along one length direction of the main base plate (2), the positioning latching block (33) is disposed between the two first positioning plates (31); among the two bottom positioning components (3) arranged along the other length direction of the main base plate (2), the positioning latching block (33) is disposed between the two first positioning plates (31). The positioning latch (33) is located on the outside of the first positioning plate (31) away from the edge of the main base plate (2); wherein, when the position and direction of the battery pack housing mounting feet are inspected, the battery pack housing (1) is placed horizontally on the main base plate (2), the second positioning plate (32) is latched with the housing (11), the first positioning plate (31), the positioning latch (33) are latched with the mounting feet (12), each positioning latch (33) performs X-axis and Y-axis positioning inspection on the mounting feet (12) on both sides, in each bottom positioning component (3), the two spaced and parallel first positioning plates (31) perform Y-axis positioning inspection on the mounting feet (12) on both sides, and the second positioning plate (32) performs Z-axis positioning inspection on the mounting feet (12) on both sides.

2. The inspection fixture for identifying the position and orientation of the mounting feet of the battery pack housing according to claim 1, characterized in that, It also includes four positioning brackets (4) and a top crossbar (5); the four positioning brackets (4) are fixedly connected to the edge of the main base plate (2), and a positioning bracket (4) is provided next to each bottom positioning component (3); the two ends of the top crossbar (5) are respectively installed on the top of the two positioning brackets (4) located in the same width direction, wherein, when the position and direction of the battery pack housing mounting feet are checked, the top crossbar (5) is snapped into the multiple aviation insertion holes (1121) provided on the housing (11).

3. The inspection fixture for identifying the position and orientation of the mounting feet of the battery pack housing according to claim 1, characterized in that, Each of the first positioning plates (31) includes a first plate body (311), and the top of the first plate body (311) is provided with a first limiting protrusion (312); wherein, when the position and direction of the battery pack housing mounting foot are inspected, the first limiting protrusion (312) provided on the first plate body (311) near the edge of the main bottom plate (2) is engaged in the insertion interface (121) on the mounting foot (12), and the first limiting protrusions (312) provided on the other first plates (311) are engaged in the bottom of the mounting foot (12), and the top of the first plate body (311) is limited and fitted with the bottom wall (111) of the housing (11) along the X-axis direction; in each of the bottom positioning components (3), the two first limiting protrusions (312) respectively provided on the two parallel first positioning plates (31) perform Y-axis direction positioning inspection on the mounting foot (12).

4. The inspection fixture for identifying the position and orientation of the mounting feet of the battery pack housing according to claim 1, characterized in that, The positioning card block (33) is adapted to the size of the card interface (122) provided on the mounting foot (12).

5. The inspection fixture for identifying the position and orientation of the mounting feet of the battery pack housing according to claim 1, characterized in that, The second positioning plate (32) includes a second plate body (321). The top of the second plate body (321) is provided with a second limiting protrusion (322) on the outer side near the edge of the main base plate (2). When the position and direction of the battery pack mounting feet are inspected, the side wall (112) and bottom wall (111) of the box body (11) along the X-axis are limited within the limiting angle (323) formed between the second plate body (321) and the second limiting protrusion (322).

6. The inspection fixture for identifying the position and orientation of the mounting feet of the battery pack housing according to claim 2, characterized in that, The positioning bracket (4) has a Z-direction positioning surface (41) parallel to the side wall (112) of the box (11) and two Y-direction positioning surfaces (42) perpendicular to the side wall (112) of the box (11). The two Y-direction positioning surfaces (42) are parallel to the same side of the Z-direction positioning surface (41) and are far away from the main base plate (2).

7. The inspection fixture for identifying the position and orientation of the mounting feet of the battery pack housing according to claim 6, characterized in that, The top of the Z-direction positioning surface (41) and the two Y-direction positioning surfaces (42) are also provided with horizontally extending mounting plates (43).

8. The inspection fixture for identifying the position and orientation of the mounting feet of the battery pack housing according to claim 2, characterized in that, The top horizontal bar (5) includes a horizontal bar body (51), and two verification pins (52) adapted to the aviation connector (1121) are also provided on one side of the horizontal bar body (51). The two verification pins (52) are distributed at intervals along the length direction of the top horizontal bar (5), and one verification pin (52) is engaged with one of the aviation connectors (1121).

9. The inspection fixture for identifying the position and orientation of the mounting feet of the battery pack housing according to claim 8, characterized in that, The width of the verification pin (52) is smaller than the width of the aviation socket (1121).

10. The inspection fixture for identifying the position and orientation of the mounting feet of the battery pack housing according to claim 8, characterized in that, One side of the main body (51) of the horizontal bar is provided with a long strip-shaped snap-fit ​​groove (511), and the verification pins (52) are distributed at intervals in the long strip-shaped snap-fit ​​groove (511), and the length of the verification pins (52) is greater than the groove depth of the long strip-shaped snap-fit ​​groove (511).

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