Special-shaped shell measuring tool for new energy automobile power battery pack

Abstract

The utility model discloses a tool for measuring a special-shaped shell of a power battery pack of a new energy automobile, which is used for measuring the special-shaped shell of the battery pack and comprises a bottom plate provided with a plurality of groups of supporting blocks; a plurality of groups of supporting blocks are arranged on the bottom plate, concave grooves are formed among the plurality of groups of supporting blocks, a plurality of groups of pressing assemblies are further arranged on the bottom plate and are arranged on the bottom plate along outer curves of the concave grooves, a detection gap is formed between the outer side wall of the battery pack special-shaped shell and the inner side wall of each concave groove, and a go-no go gauge is further arranged on each supporting block. The beneficial effects of the utility model are that through the profile modeling matching design of the recessed groove and the battery pack special-shaped housing, the accurate positioning reference establishment of the battery pack special-shaped housing to be tested is realized, and the plurality of groups of pressing assemblies distributed along the outer curve of the recessed groove form a spatial curved surface pressing system. The displacement error of the special-shaped shell of the battery pack in the measurement process is effectively eliminated, and the stability of a detection reference is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a special-shaped shell measuring tool of new energy automobile power battery pack. BACKGROUND

[0002] In today's automobile industry, with the rapid rise of new energy vehicles, the market of new energy vehicles is increasingly expanding, and the demand for new energy vehicles is increasing. The quality and stability of the special-shaped shell of the battery pack, which is the core functional component of the new energy vehicle, determine the stability of the power control and the safety of the vehicle of each new energy vehicle.

[0003] In the production process of the battery pack special-shaped shell, the profile tolerance, mounting hole position tolerance and other key dimensions need to be strictly detected. However, in the traditional measurement process, a general fixture is used for positioning. However, during positioning, the special-shaped shell has poor matching with the tool, and the reference surface is not accurately established, resulting in significant measurement repeatability error, which is difficult to meet the high-precision and high-efficiency detection requirements of batch production of new energy vehicle battery pack shells. In view of this, the utility model provides a special-shaped shell measuring tool for new energy automobile power battery pack to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a special-shaped shell measuring tool for new energy automobile power battery pack to solve the problems in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A special-shaped shell measuring tool for new energy automobile power battery pack is used for measuring the battery pack special-shaped shell, comprising a bottom plate, a plurality of support blocks are arranged on the bottom plate;

[0007] A plurality of support blocks are provided with recess grooves, the recess grooves are similar to the outer shape of the battery pack special-shaped shell, a plurality of pressing assemblies are further arranged on the bottom plate, a plurality of pressing assemblies are arranged on the bottom plate along the outer edge curve of the recess groove, the pressing assembly is in contact with the surface of the battery pack special-shaped shell, so that the battery pack special-shaped shell is limited in the recess groove, a detection gap is arranged between the outer side wall of the battery pack special-shaped shell and the inner side wall of the recess groove, a go-no-go gauge is further arranged on the support block, and the go-no-go gauge is displaced in the detection gap to detect and process the shape of the battery pack special-shaped shell.

[0008] As an improvement of the above technical scheme, a detection rod is arranged on the go-no-go gauge, and the diameter of the detection rod is the same as the spacing of the detection gap.

[0009] As an improvement of the above technical scheme, two groups of reinforcing blocks are arranged on the bottom plate, and the two groups of reinforcing blocks are symmetrically arranged on the bottom plate.

[0010] As the improvement of the above technical scheme, the pressing assembly comprises a pressing cylinder, the pressing cylinder is provided with a piston rod, the piston rod is provided with a pressing support, and the pressing support is provided with a pressing part, and the pressing part is arranged towards the supporting block.

[0011] As the improvement of the above technical scheme, the pressing assembly comprises a pressing cylinder, the pressing cylinder is provided with a piston rod, the piston rod is provided with a pressing support, and the pressing support is provided with a pressing part, and the pressing part is arranged towards the supporting block.

[0012] As the improvement of the above technical scheme, the recess groove is provided with a plurality of positioning holes, the battery pack special-shaped shell is provided with a plurality of mounting holes, the plurality of positioning holes and the plurality of mounting holes are matched in position and size, and the positioning holes are arranged on the supporting block.

[0013] One of the positioning holes is provided with a position detection pin.

[0014] As the improvement of the above technical scheme, three of the positioning holes are respectively provided with positioning pins, the positioning pins are connected with the supporting block, and the three positioning pins are respectively arranged in the mounting holes to position the battery pack special-shaped shell.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] Through the recess groove and the profile matching design of the battery pack special-shaped shell, the precise positioning reference of the measured battery pack special-shaped shell is established, a plurality of pressing assemblies distributed along the outer edge curve of the recess groove form a spatial curved surface pressing system, the displacement error of the battery pack special-shaped shell in the measurement process is effectively eliminated, the detection reference stability is ensured, whether the shell contour is qualified is quickly determined through the passing of the go-no-go gauge, the traditional step-by-step detection process is integrated into continuous scanning detection, the operator only needs to push and scan once to complete the full-circle detection of the shell contour, and the detection efficiency is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 It is a position schematic view of the pressing assembly and the supporting block of the utility model;

[0019] Figure 3 It is a position schematic view of the pressing assembly and the supporting block of the utility model; Figure 1 It is an enlarged structural schematic view of the position A of the utility model;

[0020] Figure 4 It is a structural schematic view of the pressing assembly of the utility model;

[0021] Figure 5 For the utility model Figure 2 The enlarged structural schematic view of B;

[0022] Figure 6 For the utility model Figure 2 The enlarged structural schematic view of C;

[0023] Figure 7 The structural schematic view of the special-shaped shell of the battery pack of the utility model;

[0024] Figure 8 The structural schematic view of the position degree detection bolt of the utility model;

[0025] Figure 9 The structural schematic view of the bottom plate of the utility model.

[0026] In the figure: 10, bottom plate; 11, support block; 12, recessed groove; 13, positioning hole; 14, detection gap; 15, positioning pin; 16, reinforcing block; 20, compression assembly; 21, compression shell; 22, L-shaped connecting plate; 23, compression cylinder; 24, compression part; 25, compression support; 26, piston rod; 30, special-shaped shell of battery pack; 31, mounting hole; 40, go-no-go gauge; 41, detection rod; 50, position degree detection bolt. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] Embodiment:

[0029] As Figures 1-9 shown, the embodiment provides a special-shaped shell measuring tool for new energy automobile power battery pack, which is used for measuring the special-shaped shell 30 of the battery pack and comprises a bottom plate 10, a plurality of support blocks 11 are arranged on the bottom plate 10.

[0030] A plurality of support blocks 11 are provided with recessed grooves 12 similar to the outer shape of the battery pack irregular shell 30, and a plurality of pressing assemblies 20 are also provided on the bottom plate 10, and the plurality of pressing assemblies 20 are arranged on the bottom plate 10 along the outer edge curve of the recessed groove 12, and the pressing assembly 20 is in surface contact with the battery pack irregular shell 30, so that the battery pack irregular shell 30 is limited in the recessed groove 12, and a detection gap 14 is provided between the outer side wall of the battery pack irregular shell 30 and the inner side wall of the recessed groove 12, and a go-no-go gauge 40 is also provided on the support block 11, and the go-no-go gauge 40 is displaced in the detection gap 14 to detect the shape of the battery pack irregular shell 30.

[0031] In this embodiment, when the battery pack irregular shell 30 is detected, the battery pack irregular shell 30 is placed on the support block 11, then the position of the battery pack irregular shell 30 is adjusted, so that the battery pack irregular shell 30 is placed in the recessed groove 12, and the battery pack irregular shell 30 is pressed and limited by the plurality of pressing assemblies 20, the battery pack irregular shell 30 is positioned in the recessed groove 12, and the go-no-go gauge 40 is placed in the detection gap 14 between the outer side wall of the battery pack irregular shell 30 and the inner side wall of the recessed groove 12, and the go-no-go gauge 40 is displaced in the detection gap 14 to detect the shape of the battery pack irregular shell 30;

[0032] By matching the recessed groove 12 with the shape of the battery pack irregular shell 30, the precise positioning reference of the measured battery pack irregular shell 30 is established, and the plurality of pressing assemblies 20 distributed along the outer edge curve of the recessed groove 12 form a spatial curved surface pressing system, which effectively eliminates the displacement error of the battery pack irregular shell 30 during measurement, ensures the stability of the detection reference, and quickly determines whether the shape profile of the battery pack irregular shell 30 is qualified by the passability of the go-no-go gauge 40 in the detection gap 14, integrates the traditional step-by-step detection process into continuous scanning detection, so that the operator only needs to push and scan once to complete the full-circle detection of the shell shape profile, which can effectively improve the detection efficiency.

[0033] Specifically, the go-no-go gauge 40 is provided with a detection rod 41, and the diameter of the detection rod 41 is the same as the distance of the detection gap 14.

[0034] In this embodiment, when the go-no-go gauge 40 is detected, the detection rod 41 on the go-no-go gauge 40 is inserted into the detection gap 14, and the passability of the detection rod 41 in the detection gap 14 is used to quickly determine whether the shape profile of the battery pack irregular shell 30 is qualified;

[0035] By limiting the strict equivalent relationship between the diameter of the detection rod 41 and the distance of the detection gap 14, a physical contact type rapid detection mechanism is constructed, which makes it possible to visually determine whether the profile deviation of the battery pack special-shaped shell 30 is controlled within the allowable tolerance range when the detection rod 41 can move along the detection gap 14 without obstruction, otherwise an unqualified warning is automatically triggered;

[0036] The above structural features convert the complex curved profile detection into the passability verification of the go-no-go gauge 40, effectively eliminating the subjective judgment error in manual measurement, improving the detection accuracy, and ensuring that the detection rod 41 and the gap wall form bidirectional contact limiting during the detection process through precise geometric size matching, avoiding the risk of misjudgment caused by the deflection of the detection rod 41.

[0037] Specifically, the bottom plate 10 is provided with two groups of reinforcing blocks 16, and the two groups of reinforcing blocks 16 are symmetrically arranged on the bottom plate 10.

[0038] In this embodiment, the two groups of reinforcing blocks 16 arranged symmetrically can form a double-support reinforcement structure, avoiding deformation of the battery pack special-shaped shell 30 in the middle position during the pressing process.

[0039] Specifically, the pressing assembly 20 includes a pressing cylinder 23, the pressing cylinder 23 is provided with a piston rod 26, the piston rod 26 is provided with a pressing support 25, the pressing support 25 is provided with a pressing part 24, and the pressing part 24 is arranged towards the supporting block 11.

[0040] Specifically, the pressing assembly 20 includes a pressing cylinder 23, the pressing cylinder 23 is provided with a piston rod 26, the piston rod 26 is provided with a pressing support 25, the pressing support 25 is provided with a pressing part 24, and the pressing part 24 is arranged towards the supporting block 11.

[0041] In this embodiment, when the battery pack special-shaped shell 30 is pressed, multiple pressing cylinders 23 operate simultaneously, so that the pressing support 25 moves towards the supporting block 11 until the pressing part 24 contacts the surface of the battery pack special-shaped shell 30, completing the pressing process.

[0042] The dynamic pressing mechanism is formed by driving the piston rod 26 to link the pressing support 25 through the pressing cylinder 23, a multi-point cooperative pressing mechanism is constructed, the adaptive pressing of the curved surface contact point of the battery pack special-shaped shell 30 is realized, the adaptability of the traditional rigid clamp to the complex curved surface is effectively overcome, the uniform contact pressure distribution between the pressing part 24 and the surface of the battery pack special-shaped shell 30 is ensured, and the deformation of the measurement reference surface caused by local stress concentration is avoided

[0043] The modular mounting structure combined with the L-shaped connecting plate 22 and the bolt realizes the multi-degree-of-freedom position adjustment of the pressing assembly 20 on the support block 11, enables the pressing point to be flexibly arranged along the outer edge curve of the recessed groove 12, forms a three-dimensional pressing layout matched with the geometric features of the battery pack irregular shell 30, and significantly improves the spatial adaptability and clamping stability of the curved surface positioning system.

[0044] Of course, through the precise matching control of the driving pressure of the pressing cylinder 23 and the stroke of the piston rod 26, an assembly torsion simulation system can be constructed to realize the dynamic equivalence of the normal pressure applied by the pressing part 24 and the pre-tightening torque required by the actual assembly process of the customer. This design enables the measuring tool to reproduce the real assembly load working condition in the pressing stage, ensures that the deformation characteristics of the measured shell under the simulated assembly stress state are completely captured, and effectively avoids the post-assembly interference problem caused by the deviation between the simple geometric measurement and the real stress deformation.

[0045] Specifically, a plurality of positioning holes 13 are arranged in the recessed groove 12, a plurality of mounting holes 31 are arranged on the battery pack irregular shell 30, the plurality of positioning holes 13 and the plurality of mounting holes 31 are matched in position and size, and the positioning holes 13 are arranged on the support block 11.

[0046] A position degree detection pin 50 is arranged in a group of the positioning holes 13.

[0047] In this embodiment, when the battery pack irregular shell 30 is placed in the recessed groove 12, the plurality of mounting holes 31 are aligned with the plurality of positioning holes 13. Then, the position degree detection pin 50 is inserted into the mounting hole 31, and whether the position degree detection pin 50 can quickly reach the bottom end face of the positioning hole 13 is observed to determine whether the position degree of the mounting hole 31 is qualified, thereby effectively improving the reliability of the detection data.

[0048] Specifically, a positioning pin 15 is arranged in each of the three groups of positioning holes 13, the positioning pin 15 is connected with the support block 11, and the three groups of positioning pins 15 are respectively arranged in the mounting holes 31 to position the battery pack irregular shell 30.

[0049] In this embodiment, when the battery pack irregular shell 30 is placed in the recessed groove 12, the positioning pin 15 is aligned with the mounting hole 31. Then, the battery pack irregular shell 30 is placed in the recessed groove 12, and the positioning pin 15 is arranged in the mounting hole 31 to preliminarily position the battery pack irregular shell 30;

[0050] Through the precise plug-in cooperation of the three groups of positioning pins 15 and the mounting holes 31, the spatial position of the battery pack irregular shell 30 is quickly pre-positioned, the degree-of-freedom redundancy in the clamping process of the battery pack irregular shell 30 is effectively eliminated, the measured battery pack irregular shell 30 and the profiling reference surface of the recessed groove 12 are kept in three-dimensional coordinate alignment, and the initial positioning accuracy is improved.

[0051] The self-checking function of the position degree of the mounting hole 31 is realized by adopting the split positioning pin 15 structure, if there is a position deviation of the mounting hole 31 when the battery pack special-shaped shell 30 is placed, the positioning pin 15 cannot be completely inserted into the mounting hole 31, that is, the visual or tactile feedback is triggered, the rapid preliminary screening of the hole position accuracy can be completed before the pressing process, and invalid occupation of subsequent detection resources is avoided.

[0052] Although the embodiments of the utility model have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A special-shaped shell measuring tool for a new energy vehicle power battery pack, used for measuring a battery pack special-shaped shell (30), characterized in that: Including the bottom plate (10), a plurality of sets of support blocks (11) are arranged on the bottom plate (10); A plurality of sets of recess grooves (12) are arranged between a plurality of sets of support blocks (11), the recess grooves (12) are similar to the outer shape of the battery pack special-shaped shell (30), a plurality of sets of compression assemblies (20) are further arranged on the bottom plate (10), a plurality of sets of the compression assemblies (20) are arranged on the bottom plate (10) along the outer edge curve of the recess groove (12), the compression assembly (20) is in surface contact with the battery pack special-shaped shell (30), so that the battery pack special-shaped shell (30) is limited in the recess groove (12), a detection gap (14) is arranged between the outer side wall of the battery pack special-shaped shell (30) and the inner side wall of the recess groove (12), a go-no-go gauge (40) is further arranged on the support block (11), the go-no-go gauge (40) is displaced in the detection gap (14) to detect the shape of the battery pack special-shaped shell (30).

2. The special-shaped shell measuring tool for a new energy vehicle power battery pack according to claim 1, characterized in that: The go-no-go gauge (40) is provided with a detection rod (41), and the diameter of the detection rod (41) is the same as the spacing of the detection gap (14).

3. The special-shaped shell measuring tool for a new energy vehicle power battery pack according to claim 1, characterized in that: Two sets of reinforcing blocks (16) are arranged on the bottom plate (10), and the two sets of reinforcing blocks (16) are symmetrically arranged on the bottom plate (10).

4. The irregular-shaped housing measuring tool for a new energy vehicle power battery pack according to claim 1, characterized in that: The compression assembly (20) comprises a compression cylinder (23), the compression cylinder (23) is provided with a piston rod (26), the piston rod (26) is provided with a compression support (25), the compression support (25) is provided with a compression part (24), and the compression part (24) is arranged towards the support block (11).

5. The special-shaped shell measuring tool for a new energy vehicle power battery pack according to claim 4, characterized in that: The compression assembly (20) comprises a compression shell (21), the compression cylinder (23) is arranged in the compression shell (21), the compression shell (21) is provided with an L-shaped connecting plate (22), and the L-shaped connecting plate (22) is connected with the support block (11) through bolts.

6. The special-shaped shell measuring tool for a new energy vehicle power battery pack according to claim 1, characterized in that: A plurality of sets of positioning holes (13) are arranged in the recess groove (12), a plurality of sets of mounting holes (31) are arranged on the battery pack special-shaped shell (30), a plurality of sets of the positioning holes (13) and a plurality of sets of the mounting holes (31) are matched in position and size, and the positioning hole (13) is arranged on the support block (11); A position degree detection pin (50) is arranged in a set of the positioning holes (13).

7. The special-shaped shell measuring tool for a new energy vehicle power battery pack according to claim 6, characterized in that: Three sets of positioning holes (13) are respectively provided with positioning pins (15), the positioning pins (15) are connected with the support block (11), and three sets of the positioning pins (15) are respectively arranged in the mounting hole (31) to position the battery pack special-shaped shell (30).

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