CN220304502U - Full-size measuring equipment for power battery - Google Patents

Abstract

The utility model relates to the technical field of power battery size measurement and discloses full-size power battery measurement equipment, which comprises guide rail components, wherein two groups of guide rail components are arranged in parallel; and the two groups of sliding plates are distributed along the extending direction of the guide rail assembly and are both in sliding connection with the top of the guide rail assembly, and the opposite ends of the two groups of sliding plates are fixedly connected. According to the utility model, the power battery is placed above one group of sliding plates, the measuring assembly measures the shoulder height and width of the power battery, the driving assembly is started to drive one group of sliding plates to enter the lower part of the corresponding pressing plate, the pressing assembly is started, the pressing plate is driven to descend through the second sleeve to measure the thickness of the power battery, and in the process that the pressing assembly presses the second sleeve, the spring firstly contracts and then converts and transmits the pressure, so that the pressure can be buffered, the pressure is prevented from directly acting on the pressure sensor to generate pressure mutation, and the quality of the power battery is effectively ensured.

Description

Full-size measuring equipment for power battery

Technical Field

The utility model relates to the technical field of power battery size measurement, in particular to full-size measurement equipment for a power battery.

Background

In the production process of the power battery, the external dimension (width, thickness and shoulder height) of the battery after the coating is required to be measured so as to ensure the quality of the product.

The traditional measurement mode mainly adopts a manual or single-size measurement mode, and a digital caliper is used during manual measurement, so that an auxiliary jig is needed; single dimension measurement for single dimension measurement, a dwell cylinder, clamp plate and contact displacement sensor were used to measure the width, thickness, shoulder height of the cell, respectively. In view of the efficiency of full-size measurement of batteries, the prior art also has a device capable of synchronously measuring the width, thickness and shoulder height of the battery. However, when the thickness of the power battery is measured, the pressure mutation is easy to generate, so that the power battery is damaged, and the efficiency and the quality of the power battery measurement are affected.

Disclosure of Invention

The utility model aims to solve the problem that pressure abrupt change causes damage to a power battery in the prior art when thickness measurement is performed, and provides full-size measuring equipment for the power battery, which has the function of avoiding the occurrence of the pressure abrupt change so as to protect the battery.

In order to achieve the above object, the present utility model provides a full-sized measuring apparatus for a power battery, comprising:

the guide rail assemblies are arranged in parallel;

the two groups of sliding plates are distributed along the extending direction of the guide rail assembly and are both in sliding connection with the top of the guide rail assembly, opposite ends of the two groups of sliding plates are fixedly connected, and the top of each group of sliding plates is provided with a base for placing a power battery;

the two groups of measuring assemblies are respectively arranged at the tops of the two groups of sliding plates and are used for measuring the shoulder height and the width of the power battery;

two sets of thickness measuring subassembly, two sets of thickness measuring subassembly sets up respectively near the both ends of guide rail assembly, thickness measuring subassembly includes:

the pressing plate is arranged above one end of the guide rail assembly;

the pressure sensor is arranged at the top of the pressing plate;

the first sleeve is arranged at the top of the pressing plate and sleeved on the outer side of the pressure sensor, and an opening is formed in the top of the first sleeve;

the pressing column movably penetrates through the opening, limiting plates are arranged at the bottom end and the top end of the pressing column, the shaft diameter of the limiting plate positioned below is larger than that of the opening, and the bottom of the pressing column is attached to the top of the pressure sensor;

the second sleeve is sleeved on the outer side of the limiting plate above;

the spring is sleeved on the outer side of the pressing column, one end of the spring is connected with the top end of the limiting plate positioned below, and the other end of the spring is connected with the bottom end of the second sleeve;

the pressing component is arranged at the top of the second sleeve and used for driving the second sleeve to descend so as to measure the thickness of the power battery;

and the driving assembly is connected with one group of sliding plates and used for driving the sliding plates to move to the lower part corresponding to the pressing plate along the guide rail assembly.

Optionally, the guide rail assembly includes:

the two groups of support plates are arranged in parallel, and two ends of the two groups of support plates are respectively arranged near the bottoms of the two groups of thickness measuring assemblies;

the two groups of first guide rails are respectively arranged at the tops of the two groups of support plates, and each group of sliding plates is in sliding connection with the two groups of first guide rails.

Optionally, the guide rail assembly further comprises:

a plurality of buffers respectively arranged near the end parts of the two groups of first guide rails;

and the limiting blocks are respectively arranged near the end parts of the two groups of first guide rails.

Optionally, the drive assembly comprises a drag chain.

Optionally, the measurement assembly includes:

the first fixing seat is arranged on one side of two opposite side walls of the base;

the first limit baffle is arranged on the other side of the two opposite side walls of the base;

the first driving cylinder is arranged on the first fixing seat;

the first pushing plate is arranged at the output end of the first driving cylinder and is used for being matched with the first limit baffle to attach two sides corresponding to the shoulder height of the power battery;

the first displacement sensor is arranged at the top of the first fixing seat and is used for measuring the shoulder height of the power battery in cooperation with the first push plate.

Optionally, the measurement assembly further comprises:

the second fixing seat is arranged on one side of the other two opposite side walls of the base;

the second limit baffle is arranged on the other side of the other two opposite side walls of the base;

the second driving cylinder is arranged on the second fixing seat;

the second pushing plate is arranged at the output end of the second driving cylinder and is used for being matched with the second limit baffle to attach two sides corresponding to the width of the power battery;

and the second displacement sensor is arranged at the top of the second fixing seat and is used for measuring the width of the power battery in cooperation with the second push plate.

Optionally, the thickness measuring assembly further includes a thickness measuring frame, the thickness measuring frame including:

the two groups of transverse plates are arranged in an up-down parallel manner, and the end parts of the guide rail assemblies are connected with the tops of the transverse plates correspondingly positioned below;

the four groups of support columns are arranged between the two groups of transverse plates and distributed in a direction, and the top ends and the bottom ends of the support columns are fixedly connected with the opposite sides of the two groups of transverse plates respectively;

the four groups of second guide rails are respectively arranged on the side walls of the four groups of support columns, and the side walls of the pressing plate are in sliding connection with the four second guide rails.

Optionally, the pressing assembly includes:

the electric cylinder is arranged on the transverse plate above, and the output end of the electric cylinder is connected with the top of the second sleeve;

and the third displacement sensors are arranged on the pressing plate and are used for measuring the thickness of the power battery in cooperation with the pressing plate.

Optionally, the measuring device further comprises a plurality of photoelectric sensors, wherein the photoelectric sensors are arranged on the top of the sliding plate and are used for detecting the flat state of the power battery.

Optionally, the measuring device further comprises:

the two groups of Y-shaped joints are respectively connected with the opposite end pins of the two groups of sliding plates;

the connecting column is arranged between the two groups of Y-shaped connectors, and two ends of the connecting column are respectively connected with the two groups of Y-shaped connectors.

According to the full-size measuring equipment for the power battery, provided by the technical scheme, the power battery is placed above one group of sliding plates, the measuring assembly is used for measuring the shoulder height and width of the power battery, the driving assembly is started to drive one group of sliding plates to enter the lower part of the corresponding pressing plate, the pressing assembly is started, the pressing plate is driven to descend through the second sleeve to measure the thickness of the power battery, in the process of pressing the second sleeve by the pressing assembly, the second sleeve pushes the limiting plate positioned below to press the pressure sensor through acting on the spring, the spring is contracted first and then the pressure is converted and transmitted, so that the pressure can be buffered, the pressure is prevented from directly acting on the pressure sensor to generate pressure mutation, and the quality of the power battery is effectively ensured; meanwhile, the driving assembly drives the two groups of sliding plates to alternately enter the corresponding thickness measuring assemblies for thickness measurement, and the measuring efficiency can be effectively improved.

Drawings

FIG. 1 is a schematic diagram of a full-scale measurement device for a power cell according to one embodiment of the present utility model;

FIG. 2 is an enlarged schematic view according to area A of FIG. 1;

FIG. 3 is an enlarged schematic view according to region B of FIG. 1;

FIG. 4 is a top view of a full-sized measurement device for a power cell according to one embodiment of the utility model;

FIG. 5 is a side view of a full-sized measurement device of a power cell according to one embodiment of the utility model;

FIG. 6 is a side view of a full-sized measurement device of a power cell according to one embodiment of the utility model;

FIG. 7 is a schematic view of the structure of a measuring assembly in a full-sized measuring device for a power cell according to one embodiment of the present utility model;

fig. 8 is a cross-sectional view of a thickness measuring assembly in a full-sized measuring device for a power cell according to one embodiment of the present utility model.

Description of the reference numerals

1. Transverse plate 2 and support column

3. Second guide rail 4 and thickness measuring frame

5. Pressing plate 6 and supporting plate

7. Limiting block 8 and first guide rail

9. Buffer 10 and rail assembly

11. Third displacement sensor 12, electric cylinder

13. Skateboard 14, first fixing seat

15. First driving cylinder 16, first displacement sensor

17. First push plate 18, power battery

19. Second push plate 20 and second fixing seat

21. Second displacement sensor 22, second driving cylinder

23. Connecting column 24, Y-shaped joint

25. Photoelectric sensor 26 and driving assembly

27. Second sleeve 28, spring

29. First sleeve 30, pressure sensor

31. Limiting plate 32, first limiting baffle

33. Second limit baffle 34, base

35. Compression column

Detailed Description

The following describes the detailed implementation of the embodiments of the present utility model with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

FIG. 1 is a schematic diagram of a full-scale measurement device for a power cell according to one embodiment of the present utility model; FIG. 2 is an enlarged schematic view according to area A of FIG. 1; fig. 8 is a cross-sectional view of a thickness measuring assembly in a full-sized measuring device for a power cell according to one embodiment of the present utility model. In fig. 1, 2 and 8, the measuring device may include a rail assembly 10, two sets of skids 13, two sets of measuring assemblies, two sets of thickness measuring assemblies, and a drive assembly 26. Specifically, the sled 13 may include a base 34 and the thickness measurement assembly may include a platen 5, a pressure sensor 30, a first sleeve 29, a pressure post 35, a second sleeve 27, a spring 28, and a hold down assembly. Specifically, the first sleeve 29 may include an opening, and the press stud 35 may include two sets of limiting plates 31.

The two sets of guide rail assemblies 10 are arranged in parallel, the two sets of sliding plates 13 are distributed along the extending direction of the guide rail assemblies 10 and are both in sliding connection with the tops of the guide rail assemblies 10, opposite ends of the two sets of sliding plates 13 are fixedly connected, and a base 34 for placing the power battery 18 is arranged at the top of each set of sliding plates 13. The two sets of measuring assemblies are respectively arranged on the tops of the two sets of sliding plates 13 and are used for measuring the shoulder height and the width of the power battery 18. Two sets of thickness measuring components are respectively arranged near two ends of the guide rail component 10, the pressing plate 5 is arranged above one end of the guide rail component 10, and the pressure sensor 30 is arranged on the top of the pressing plate 5. The first sleeve 29 is arranged at the top of the pressing plate 5 and sleeved outside the pressure sensor 30, and an opening is formed in the top of the first sleeve 29. The pressure column 35 movably penetrates through the opening, the bottom end and the top end of the pressure column 35 are both provided with limiting plates 31, and the shaft diameter of the limiting plates 31 positioned below is larger than that of the opening, and the bottom of the limiting plates 31 is attached to the top of the pressure sensor 30. The second sleeve 27 is sleeved outside the limiting plate 31 above, the spring 28 is sleeved outside the pressing column 35, one end of the spring 28 is connected with the top end of the limiting plate 31 below, and the other end of the spring 28 is connected with the bottom end of the second sleeve 27. The hold down assembly is disposed on top of the second sleeve 27 for driving the second sleeve 27 downward to measure the thickness of the power cell 18. The drive assembly 26 is connected to one of the sets of skids 13 for driving the skids 13 along the rail assembly 10 to move under the corresponding platen 5.

When the size measurement is required to be performed on the coated power battery 18, the coated power battery 18 is moved to the top of the base 34 corresponding to the sliding plate 13 between the two groups of thickness measuring assemblies, and then the driving assembly 26 is started, the driving assembly 26 drives one group of sliding plates 13 to move along the guide rail assembly 10, and as the two groups of sliding plates 13 are fixedly connected, no matter which sliding plate 13 is connected with the driving assembly 26, the two groups of sliding plates 13 can be driven to synchronously move. The measurement assembly is capable of measuring the shoulder height and width of the power cell 18 when the power cell 18 is placed on the base 24. When the slide plate 13 and the power battery 18 move to the lower part of the corresponding pressing plate 5, the pressing assembly is started to press the second sleeve 27, and the second sleeve 27 acts on the spring 28 to push the limiting plate 31 positioned below to press the pressure sensor 30, so that the pressing plate 5 is pushed to move until the pressing plate is attached to the top of the power battery, and the thickness of the power battery 18 can be measured, namely the full-size measurement of the power battery 18 is realized.

The traditional power battery measurement mode mainly adopts a manual or single-size measurement mode, but considering the efficiency of full-size measurement of the battery, the prior art also has a device capable of synchronously measuring the width, thickness and shoulder height of the battery. However, when the thickness of the power battery 18 is measured, the pressure mutation is easy to generate, so that the power battery is damaged, and the efficiency and quality of the power battery measurement are affected. In this embodiment of the present utility model, the spring 28 is adopted to convert and transmit the pressure after being stressed and contracted, that is, the pressure is buffered, so that the pressure is prevented from directly acting on the pressure sensor 30 to generate pressure abrupt change, and the quality of the power battery 18 is effectively ensured. The full-size of the power battery 18 can be measured by adopting a mode of matching the measuring assembly and the thickness measuring assembly, meanwhile, the driving assembly 26 drives the two groups of sliding plates 13 to alternately enter the corresponding thickness measuring assembly for thickness measurement, so that the measuring efficiency can be effectively improved, and the beat is promoted.

In this embodiment of the present utility model, as shown in fig. 3, the rail assembly 10 may include two sets of support plates 6, two sets of first guide rails 8, a plurality of buffers 9, and a plurality of stoppers 7.

The two groups of support plates 6 are arranged in parallel, and two ends of the two groups of support plates 6 are respectively arranged near the bottoms of the two groups of thickness measuring assemblies. The two groups of first guide rails 8 are respectively arranged at the tops of the two groups of support plates 6, and each group of sliding plates 13 is in sliding connection with the two groups of first guide rails 8. The plurality of buffers 9 are respectively provided near the ends of the two sets of first guide rails 8, and the plurality of stoppers 7 are respectively provided near the ends of the two sets of first guide rails 8.

Two sets of backup pad 6 can support two sets of first guided way 8 respectively, and stability and reliability in the slip process of two sets of slide 13 can be improved to the setting of two sets of first guided ways 8. The plurality of buffers 9 are located at the end parts of the first guide rails 8, and can buffer the process of the sliding plate 13 right below the pressing plate 5, and the plurality of limiting blocks 7 are matched to limit the sliding plate 13, so that the reliability and the accuracy of the movement of the sliding plate 13 and the power battery 18 on the sliding plate to the thickness measuring position are improved.

In this embodiment of the utility model, specific configurations for the drive assembly 26 include, but are not limited to, drive chains, ball screws, drag chains, and the like, as known to those skilled in the art.

In this embodiment of the present utility model, as shown in fig. 1, 2, and 7, the measuring assembly may include a first fixing base 14, a first limit stop 32, a first driving cylinder 15, a first push plate 17, a first displacement sensor 16, a second fixing base 20, a second limit stop 33, a second driving cylinder 22, a second push plate 19, and a second displacement sensor 21.

The first fixing seat 14 is arranged on one side of two opposite side walls of the base 34, the first limit baffle 32 is arranged on the other side of two opposite side walls of the base 34, the first driving cylinder 15 is arranged on the first fixing seat 14, and the first push plate 17 is arranged at the output end of the first driving cylinder 15 and is used for being matched with the first limit baffle 32 to attach two sides corresponding to the shoulder height of the power battery 18. The first displacement sensor 16 is disposed on the top of the first fixing base 14, and is used for measuring the shoulder height of the power battery 18 in cooperation with the first push plate 17. The second fixing base 20 is disposed at one side of the other two opposite side walls of the base 34, and the second limit baffle 33 is disposed at the other side of the other two opposite side walls of the base 34. The second driving cylinder 22 is disposed on the second fixing seat 20, and the second push plate 19 is disposed at an output end of the second driving cylinder 22, and is configured to cooperate with the second limit baffle 33 to attach two sides corresponding to the width of the power battery 18. A second displacement sensor 21 is provided on top of the second holder 20 for measuring the width of the power cell 18 in cooperation with the second push plate 19.

When the shoulder height of the power battery 18 needs to be measured, the first driving cylinder 15 is started, the first driving cylinder 15 pushes the first pushing plate 17 to move until the first pushing plate 17 and the first limit baffle 32 are attached to two opposite side walls of the power battery 18, and the first displacement sensor 16 can accurately measure the shoulder height of the power battery 18. Similarly, when the width of the power battery 18 needs to be measured, the second driving cylinder 22 is started to push one end of the second push plate 19 until the second push plate 19 and the second limit baffle 33 are attached to two opposite side walls of the power battery 18, and the second displacement sensor 21 can accurately measure the width of the power battery 18.

In this embodiment of the utility model, the thickness measurement assembly may further comprise a thickness measurement stand 4, as shown in fig. 1, 4, 5 and 6. In particular, the thickness measuring frame 4 may include two sets of cross plates 1, four sets of support columns 2, and four sets of second guide rails 3.

The two groups of transverse plates 1 are arranged in an up-down parallel mode, and the end portions of the guide rail assemblies 10 are connected with the tops of the transverse plates 1 correspondingly positioned below. Four sets of support columns 2 are arranged between the two sets of transverse plates 1 and distributed in the direction, and the top ends and the bottom ends of the support columns 2 are fixedly connected with the opposite sides of the two sets of transverse plates 1 respectively. The four groups of second guide rails 3 are respectively arranged on the side walls of the four groups of support columns 2, and the side walls of the pressing plate 5 are in sliding connection with the four groups of second guide rails 3.

When the pressing assembly is started, the pressing plate 5 is pushed to move downwards, and the pressing plate 5 moves downwards stably along the four groups of second guide rods 3 until the pressing plate is attached to the top of the power battery 18. In view of the protection of the power battery 18, the bottom of the pressing plate 5 may be provided with a fitting block to be fitted with the top of the power battery 18. The parallelism of the pressing block 5 can be guaranteed by the four groups of second guide rails 3, on one hand, damage deformation of the power battery 18 caused by inclination cannot be caused, and on the other hand, the accuracy and stability of thickness measurement of the power battery 18 can be improved.

In this embodiment of the utility model, as shown in fig. 1, the hold-down assembly may include an electric cylinder 12 and a plurality of third displacement sensors 11. Specifically, the electric cylinder 12 is provided on the upper cross plate 1, and the output end of the electric cylinder 12 is connected to the top of the second sleeve 27. A plurality of third displacement sensors 11 are provided on the pressure plate 5 for measuring the thickness of the power battery 18 in cooperation with the pressure plate 5. Specifically, when the thickness measurement is required, the driving cylinder 12 is started, that is, the second sleeve 27 can be pressed, and when the pressing plate 5 moves to be in contact with the top of the power battery 18, the third displacement sensor 11 can measure the thickness of the power battery 18. In addition, the provision of the plurality of third displacement sensors 11 can detect the flatness of the power battery 18 simultaneously, so as to further improve the accuracy of thickness measurement of the power battery 18.

In this embodiment of the utility model, the measuring device may further comprise a plurality of photosensors 25, as shown in fig. 2 and 7. Specifically, a photoelectric sensor 25 is provided on the top of the sled 13 for detecting the in-place, flatness/flat state, and the forward and reverse of the power cell 18, and the like. Specifically, the photoelectric sensor 25 detects that the power battery 18 is in place, has good flatness and is not reversed, and then the shoulder height and width of the power battery 18 are measured, so that damage to the power battery 18 caused by reversed and uneven placement and the like can be avoided, and the repair rate/reject ratio is reduced.

In this embodiment of the utility model, the measuring device may also comprise two sets of Y-joints 24 and connecting posts 23, as shown in fig. 2.

The two groups of Y-shaped joints 24 are respectively connected with the opposite ends of the two groups of sliding plates 13 in a pin shaft manner, the connecting column 23 is arranged between the two groups of Y-shaped joints 24, and two ends of the connecting column 23 are respectively connected with the two groups of Y-shaped joints 24.

The Y-shaped connector 24 is connected with the sliding plate 13 through the pin shaft, so that the connection stability of the two groups of sliding plates 13 can be ensured, and the installation and the disassembly are convenient.

In this embodiment of the utility model, the measurement opportunities for the shoulder height and width of the power cell 18 may include, but are not limited to, placement of the power cell 18 and movement of the power cell 18 directly under the platen 5. Specifically, the shoulder height and width measurements of the power cell 18 during the thickness measurement can be staggered, avoiding the impact of the high pressure of the thickness measurement on the stability of the shoulder height and width measurements of the power cell 18.

According to the technical scheme, the full-size measuring equipment for the power battery is characterized in that the power battery 18 is placed above one group of sliding plates 13, the measuring assembly is used for measuring the shoulder height and width of the power battery, the driving assembly 26 is started to drive one group of sliding plates 13 to enter the lower part of the corresponding pressing plate 5, the pressing assembly is started, the pressing plate 5 is driven to descend through the second sleeve 27 to measure the thickness of the power battery 18, in the process of pressing the second sleeve 27 by the pressing assembly, the second sleeve 27 pushes the limiting plate 31 positioned below to press the pressure sensor 30 through acting on the spring 28, the spring 28 is contracted first and then the pressure is converted and transmitted, so that the pressure can be buffered, the pressure is prevented from directly acting on the pressure sensor 30 to generate pressure mutation, and the quality of the power battery 18 is effectively ensured; meanwhile, the driving assembly 26 drives the two groups of sliding plates 13 to alternately enter the corresponding thickness measuring assemblies for thickness measurement, so that the measurement efficiency can be effectively improved.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims (10)

1. A full-size measurement device for a power cell, comprising:

the guide rail assemblies (10), two groups of the guide rail assemblies (10) are arranged in parallel;

two groups of sliding plates (13) are distributed along the extending direction of the guide rail assembly (10) and are both in sliding connection with the top of the guide rail assembly (10), opposite ends of the two groups of sliding plates (13) are fixedly connected, and a base (34) for placing a power battery (18) is arranged at the top of each group of sliding plates (13);

the two groups of measuring assemblies are respectively arranged at the tops of the two groups of sliding plates (13) and are used for measuring the shoulder height and the width of the power battery (18);

two sets of thickness measurement subassembly, two sets of thickness measurement subassembly set up respectively near the both ends of guide rail assembly (10), thickness measurement subassembly includes:

the pressing plate (5) is arranged above one end of the guide rail assembly (10);

a pressure sensor (30) arranged on top of the pressure plate (5);

the first sleeve (29) is arranged at the top of the pressing plate (5) and sleeved on the outer side of the pressure sensor (30), and an opening is formed in the top of the first sleeve (29);

the pressing column (35) movably penetrates through the opening, limiting plates (31) are arranged at the bottom end and the top end of the pressing column (35), the shaft diameter of the limiting plates (31) positioned below is larger than that of the opening, and the bottom of the pressing column is attached to the top of the pressure sensor (30);

the second sleeve (27) is sleeved on the outer side of the limiting plate (31) above;

the spring (28) is sleeved on the outer side of the pressing column (35), one end of the spring (28) is connected with the top end of the limiting plate (31) positioned below, and the other end of the spring (28) is connected with the bottom end of the second sleeve (27);

a pressing assembly arranged on the top of the second sleeve (27) and used for driving the second sleeve (27) to descend so as to measure the thickness of the power battery (18);

and the driving assembly (26) is connected with one group of sliding plates (13) and is used for driving the sliding plates (13) to move to the lower part corresponding to the pressing plate (5) along the guide rail assembly (10).

2. The measurement device according to claim 1, wherein the rail assembly (10) comprises:

the two groups of support plates (6) are arranged in parallel, and two ends of the two groups of support plates (6) are respectively arranged near the bottoms of the two groups of thickness measuring assemblies;

the two groups of first guide rails (8) are respectively arranged at the tops of the two groups of support plates (6), and each group of sliding plates (13) is in sliding connection with the two groups of first guide rails (8).

3. The measurement device according to claim 2, wherein the rail assembly (10) further comprises:

a plurality of buffers (9) respectively provided near the ends of the two sets of first guide rails (8);

and a plurality of limiting blocks (7) which are respectively arranged near the ends of the two groups of first guide rails (8).

4. The measurement device according to claim 1, wherein the drive assembly (26) comprises a drag chain.

5. The measurement device of claim 1, wherein the measurement assembly comprises:

a first fixed seat (14) arranged on one side of two opposite side walls of the base (34);

a first limit stop (32) disposed on the other side of two opposing side walls of the base (34);

the first driving cylinder (15) is arranged on the first fixing seat (14);

the first push plate (17) is arranged at the output end of the first driving cylinder (15) and is used for being matched with the first limit baffle (32) to attach two sides corresponding to the shoulder height of the power battery (18);

the first displacement sensor (16) is arranged at the top of the first fixing seat (14) and is used for measuring the shoulder height of the power battery (18) in cooperation with the first push plate (17).

6. The measurement device of claim 5, wherein the measurement assembly further comprises:

the second fixing seat (20) is arranged on one side of the other two opposite side walls of the base (34);

a second limit baffle (33) arranged on the other side of the other two opposite side walls of the base (34);

the second driving cylinder (22) is arranged on the second fixing seat (20);

the second pushing plate (19) is arranged at the output end of the second driving cylinder (22) and is matched with the second limit baffle (33) to attach two sides corresponding to the width of the power battery (18);

the second displacement sensor (21) is arranged at the top of the second fixing seat (20) and is used for measuring the width of the power battery (18) in cooperation with the second push plate (19).

7. The measurement device according to claim 1, wherein the thickness measurement assembly further comprises a thickness measurement frame (4), the thickness measurement frame (4) comprising:

the two groups of transverse plates (1) are arranged in parallel up and down, and the end parts of the guide rail assemblies (10) are connected with the tops of the transverse plates (1) correspondingly positioned below;

the four groups of support columns (2) are arranged between the two groups of transverse plates (1) and distributed in a direction, and the top ends and the bottom ends of the support columns (2) are fixedly connected with the opposite sides of the two groups of transverse plates (1) respectively;

the four groups of second guide rails (3), the four groups of second guide rails (3) are respectively arranged on the side walls of the four groups of support columns (2), and the side walls of the pressing plate (5) are in sliding connection with the four second guide rails (3).

8. The measurement apparatus of claim 7 wherein the hold-down assembly comprises:

an electric cylinder (12) arranged on the transverse plate (1) above, wherein the output end of the electric cylinder (12) is connected with the top of the second sleeve (27);

and a plurality of third displacement sensors (11) arranged on the pressing plate (5) and used for measuring the thickness of the power battery (18) in cooperation with the pressing plate (5).

9. The measuring device according to claim 1, characterized in that it further comprises a plurality of photoelectric sensors (25), said photoelectric sensors (25) being arranged on top of said sled (13) for detecting the flat state of said power battery (18).

10. The measurement device of claim 1, wherein the measurement device further comprises:

two groups of Y-shaped joints (24) are respectively connected with the pin shafts at the opposite ends of the two groups of sliding plates (13);

the connecting column (23) is arranged between the two groups of Y-shaped connectors (24), and two ends of the connecting column (23) are respectively connected with the two groups of Y-shaped connectors (24).