CN114688949A - Lithium battery module bottom flatness detection device - Google Patents

Abstract

The invention discloses a flatness detection device for the bottom of a lithium battery module, comprising a detection platform, a measurement mechanism and a data acquisition system. The measurement mechanism is arranged on the detection platform. During measurement, the measurement mechanism squeezes the bottom of the lithium battery module. Press and collect the data of the bottom plane of the lithium battery module, and then send the collected data to the data acquisition system for analysis and comparison, and obtain the test result of the flatness of the bottom of the lithium battery module. The invention can quickly detect the flatness of the bottom surface of the lithium battery module, and has simple structure and high detection accuracy.

Description

A lithium battery module bottom flatness detection device

technical field

The invention relates to the technical field of lithium batteries, in particular to a bottom flatness detection device of a lithium battery module.

Background technique

In the production process of lithium battery modules, due to the complex assembly process of lithium battery modules and the influence of various factors such as equipment, materials, and processes, the assembled lithium battery modules are prone to poor bottom flatness, and the bottom is flat. Poor degree of welding can easily lead to false welding of the cover plate. When the lithium battery module is put into the box, it cannot fully contact the structural adhesive at the bottom of the box, resulting in poor overall fixing strength of the lithium battery module, and there are many hidden dangers. Therefore, it is necessary to detect the flatness of the bottom of the lithium battery module, and remove the lithium batteries that fail the bottom flatness test to ensure the stability of the overall structure of the subsequent battery box.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a device for detecting the flatness of the bottom of the lithium battery module, which can quickly detect the flatness of the bottom surface of the lithium battery module, and has a simple structure and high detection accuracy.

The technical scheme of the present invention is:

A flatness detection device at the bottom of a lithium battery module, comprising a detection platform, a measurement mechanism and a data acquisition system;

The measuring mechanism includes a cylinder, a pressure plate and a plurality of electronic dial gauges arranged on the detection platform. The piston rod of the cylinder is fixedly connected to the pressure plate, and the plurality of electronic dial gauges are evenly distributed on the pressure plate. The measuring ends of the meter are vertically facing the bottom of the lithium battery module on the detection platform, and the data output ends of multiple electronic dial indicators are connected to the data acquisition system.

The module positioning support frame is also fixed on the detection platform. The module positioning support frame includes two inverted U-shaped support frames fixed on the detection platform. The two inverted U-shaped support frames are parallel to each other, and the lithium battery module The two ends of the cylinder are respectively supported on the horizontal parts of the top ends of the two inverted U-shaped support frames; the cylinder is fixed on the detection platform, and the piston rod of the cylinder extends vertically upward and is fixedly connected with the pressure plate. The measuring ends of the dial indicators all pass through the pressing plate vertically upward, and the measuring ends of a plurality of electronic dial indicators are located at the same level.

The module positioning mechanism also includes a limit bar, the limit bar is adjacent to the vertical parts of the two inverted U-shaped supports located on the same side, and the two ends of the limit bar are respectively supported and fixed on the two inverted U-shaped supports. On the horizontal part of the top of the frame, the lithium battery module is supported on the module positioning support frame and is close to the limit bar.

The measuring mechanism also includes four guide rods, the detection platform is provided with four linear bearings, the four guide rods are respectively connected to the four linear bearings, the pressure plate is a rectangular plate structure, and the pressure plate is fixed on the four guide rods. The top, and the four guide rods are respectively located at the four corners of the pressure plate, the piston rod of the cylinder extends vertically upwards and is fixedly connected with the central part of the pressure plate, and a plurality of electronic dial indicators are evenly distributed on the lower surface of the pressure plate in a matrix.

Two pneumatic buffer mechanisms are also fixed on the detection platform, and the two pneumatic buffer mechanisms are located on the sides of the two ends of the pressure plate respectively. Each pneumatic buffer mechanism includes a mounting seat, an inverted L-shaped bracket, a hydraulic buffer, and a fixing block. and limit bolts, the mounting seat is fixed on the inspection platform, the bottom end of the inverted L-shaped bracket is fixed on the mounting seat, the horizontal part of the top of the inverted L-shaped bracket is located just above the end of the pressure plate, and the hydraulic buffer is fixed on the inverted L-shaped bracket On the horizontal part of the top end of the bracket, the piston end of the hydraulic buffer faces the upper surface of the pressure plate, the fixing block is fixed on the vertical part of the inverted L-shaped bracket and is located directly under the pressure plate, and the limit bolt is vertically arranged and its bolt head is located in the upper surface of the pressure plate. At the top, the limit bolt is threadedly connected to the fixing block.

A plurality of dial indicator locking blocks are evenly distributed on the pressing plate, and each electronic dial indicator is fixedly connected to the corresponding dial indicator locking block.

Both the manual reversing valve and the pressure reducing valve of the cylinder are arranged on the detection platform.

The data acquisition system includes a computer and a hub, and the output data lines of a plurality of electronic dial indicators are connected to the computer through the hub.

An electrical cabinet is fixed on the detection platform, and the cylinder and a plurality of electronic dial indicators are connected with the electrical cabinet to realize power supply.

Advantages of the present invention:

When the present invention detects, it is only necessary to set the lithium battery module on the module positioning mechanism to control the manual reversing valve of the cylinder, and the measuring mechanism can move up to contact and detect the bottom of the lithium battery module, and the detection data is sent after detection. For the data acquisition system, the data acquisition system analyzes and compares the detection data to obtain the detection result of the bottom flatness of the lithium battery module. The whole detection process is fast and the operation is simple; the plurality of electronic dial indicators of the present invention are evenly distributed in a matrix On the lower surface of the pressing plate, each area at the bottom of the lithium battery module can be detected synchronously, so that the detection accuracy is high.

Description of drawings

FIG. 1 is a front view of the present invention for detecting a lithium battery module.

Figure 2 is a schematic structural diagram of the present invention.

3 is a schematic structural diagram of the module positioning mechanism on the detection platform of the present invention.

Figure 4 is a schematic structural diagram of the inventive measuring mechanism.

FIG. 5 is a schematic structural diagram of the pneumatic buffer mechanism of the present invention.

FIG. 6 is a schematic structural diagram of the inventive data acquisition system.

Reference numerals, 1-detection platform, 2-module positioning mechanism, 3-measurement mechanism, 4-pneumatic buffer mechanism, 5-data acquisition system, 6-lithium battery module, 21-inverted U-shaped support frame, 22- Limit bar, 31-cylinder, 32-pressing plate, 33-electronic dial indicator, 34-guide rod, 35-linear bearing, 36-dial indicator locking block, 37-manual reversing valve, 38-pressure reducing valve , 39-electrical cabinet, 41-mounting seat, 42-inverted L-shaped bracket, 43-hydraulic buffer, 44-fixing block, 45-limiting bolt, 51-computer, 52-hub, 53-electronic dial indicator output data line.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

A flatness detection device for the bottom of a lithium battery module, comprising a detection platform 1, a module positioning mechanism 2, a measuring mechanism 3, two pneumatic buffer mechanisms 4 and a data acquisition system 5;

The module positioning mechanism 2 includes two inverted U-shaped support frames 21 fixed on the detection platform 1 and a limit bar 22. The two inverted U-shaped support frames 21 are parallel to each other, and the two ends of the lithium battery module 6 are respectively Supported on the horizontal part of the top of the two inverted U-shaped support frames 21, the limit bar 22 is adjacent to the vertical part of the two inverted U-shaped support frames 21 on the same side, and the two ends of the lithium battery module 6 are respectively supported and fixed. On the horizontal part of the top of the two inverted U-shaped support frames 21 and close to the limit bar 22, the accurate positioning of the lithium battery module 6 is realized;

The measuring mechanism 3 includes a cylinder 31, a pressure plate 32, a plurality of electronic dial indicators 33 and four guide rods 34. The cylinder 31 is fixed on the detection platform 1, the piston rod of the cylinder 31 extends vertically upward, and the pressure plate 32 is a rectangular plate structure. , the central part of the pressure plate 32 is fixedly connected to the top end of the piston rod of the cylinder 31, the detection platform 1 is provided with four linear bearings 35, the four guide rods 34 are respectively connected to the four linear bearings 35, and the pressure plate 32 is fixed to the four guide The top of the rod 34, and the four guide rods 34 are respectively located at the four corners of the pressure plate 32, a plurality of dial indicator locking blocks 36 are fixed on the lower surface of the pressing plate 32, and the plurality of dial indicator locking blocks 36 are arranged in a matrix Evenly distributed on the lower surface of the pressure plate 32, each electronic dial indicator 33 is fixedly connected to the corresponding dial indicator locking block 36, and the measuring ends of the plurality of electronic dial indicators 33 pass through the pressure plate 32 vertically upward, And the measuring ends of the plurality of electronic dial indicators 33 are located at the same level, the pressure plate 32 is located directly below the horizontal part of the two inverted U-shaped support frames 21, and the measuring ends of the plurality of electronic dial indicators 33 are vertically facing the two inverted U-shaped supports. The bottom of the lithium battery module 6 on the type support frame 21; the manual reversing valve 37 and the pressure reducing valve 38 of the cylinder 31 are fixed on the detection platform 1, and the detection platform 1 is also fixed with an electrical cabinet 39, a cylinder 31 and a plurality of The electronic dial indicator 33 is connected with the electrical cabinet 39 to realize power supply;

The two pneumatic buffer mechanisms 4 are located on the sides of the two ends of the pressure plate 32 respectively. Each pneumatic buffer mechanism includes a mounting seat 41, an inverted L-shaped bracket 42, a hydraulic buffer 43, a fixing block 44 and a limit bolt 45. The mounting seat 41 It is fixed on the detection platform 1, the bottom end of the inverted L-shaped bracket 42 is fixed on the mounting seat 41, the horizontal part of the top of the inverted L-shaped bracket 42 is located directly above the end of the pressure plate 32, and the hydraulic buffer 43 is fixed on the inverted L-shaped bracket. On the horizontal part of the top end of 42, the piston end of the hydraulic buffer 43 faces the upper surface of the pressing plate 32, the fixing block 44 is fixed on the vertical part of the inverted L-shaped bracket 42 and is located directly below the pressing plate 32, and the limit bolt 45 is vertical set and its bolt head is located at the top, the limit bolt 45 is threadedly connected to the fixing block 44 to realize the adjustment of the horizontal height of the top of the limit bolt 45;

The data acquisition system 5 includes a computer 51 and a hub 52 , and the output data lines 53 of the plurality of electronic dial indicators 33 are all connected to the computer 51 through the hub 52 .

The working principle of the present invention:

(1) First close the pneumatic reversing valve 37, the cylinder 31 is reset, and the cylinder 31 drives the pressure plate 32 to descend. Due to the action of the two pneumatic buffer mechanisms 4, the limit bolts 45 of the two pneumatic buffer mechanisms 4 are pressed against the lower surface of the pressure plate 32. The two ends of the , realize the reset of the measuring mechanism 3;

(2), transport the lithium battery module 6 to the top of the two inverted U-shaped support frames 21, and one of the long side walls of the lithium battery module 6 is close to the limit bar 22, so as to realize the length of the lithium battery module 6. and positioning in the width direction;

(3) After the positioning is completed, open the pneumatic reversing valve 37, and the cylinder 31 drives the pressure plate 32 to move upward. During the upward movement, the two ends of the upper surface of the pressure plate 32 contact the hydraulic buffers 43 of the two pneumatic buffer mechanisms 4 respectively. , keep the measuring mechanism 3 moving upwards stably and evenly, until the pressing plate 32 contacts the horizontal part of the two U-shaped support plates 21, the measuring mechanism 3 stops moving upward, and the measuring ends of the plurality of electronic dial indicators 33 have been connected to the lithium battery. The bottom of the module 6 is in contact and is in a compressed state;

(4), a plurality of electronic dial gauges 33 collect the measurement data of the bottom plane of the lithium battery module 6, after the measurement data is stabilized, the plurality of electronic dial gauges 33 transmit the measurement data to the computer 51 through the hub 52, and the computer 51 according to For the measurement data of multiple electronic dial gauges 33, determine whether the error value between the multiple measurement data exceeds the set range. If the error value does not exceed the set range, the flatness meets the standard. When the error value of any measurement data exceeds the set range, the flatness Does not meet the standard;

(5) After the measurement is completed, the pneumatic reversing valve 37 is closed, and the measuring mechanism 3 is lowered and reset.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (9)

1. The utility model provides a lithium cell module bottom flatness detection device which characterized in that: comprises a detection platform, a measuring mechanism and a data acquisition system;

the measuring mechanism comprises an air cylinder, a pressing plate and a plurality of electronic dial indicators, the air cylinder, the pressing plate and the electronic dial indicators are arranged on the detection platform, a piston rod of the air cylinder is fixedly connected with the pressing plate, the electronic dial indicators are uniformly distributed on the pressing plate, measuring ends of the electronic dial indicators are perpendicular to the bottom of the lithium battery module on the detection platform, and data output ends of the electronic dial indicators are connected with the data acquisition system.

2. The lithium battery module bottom flatness detection device of claim 1, characterized in that: the detection platform is also fixedly provided with a module positioning support frame, the module positioning support frame comprises two inverted U-shaped support frames fixed on the detection platform, the two inverted U-shaped support frames are parallel to each other, and two end parts of the lithium battery module are respectively supported on the horizontal parts of the top ends of the two inverted U-shaped support frames; the air cylinder is fixed on the detection platform, a piston rod of the air cylinder vertically extends upwards and is fixedly connected with the pressing plate, the measuring ends of the electronic dial indicators vertically penetrate through the pressing plate upwards, and the measuring ends of the electronic dial indicators are located at the same horizontal height.

3. The device for detecting the flatness of the bottom of the lithium battery module as recited in claim 2, wherein: the module positioning mechanism further comprises a limiting strip, the limiting strip is adjacent to the vertical parts of the two inverted U-shaped supporting frames on the same side, the two end parts of the limiting strip are respectively supported and fixed on the horizontal parts of the top ends of the two inverted U-shaped supporting frames, and the lithium battery module is supported on the module positioning supporting frame and is close to the limiting strip.

4. The device for detecting the flatness of the bottom of the lithium battery module as recited in claim 2, wherein: the measuring mechanism further comprises four guide rods, the detecting platform is provided with four linear bearings, the four guide rods are respectively connected onto the four linear bearings, the pressing plate is of a rectangular plate structure, the pressing plate is fixed at the top ends of the four guide rods, the four guide rods are respectively located at four corners of the pressing plate, a piston rod of the air cylinder vertically extends upwards and is fixedly connected with the central portion of the pressing plate, and the electronic dial indicators are uniformly distributed on the lower surface of the pressing plate in a matrix mode.

5. The lithium battery module bottom flatness detection device of claim 2, characterized in that: the detection platform on still be fixed with two pneumatic buffer gear, two pneumatic buffer gear are located the side at clamp plate both ends respectively, every pneumatic buffer gear is all including the mount pad, the type of falling L support, hydraulic buffer, fixed block and spacing bolt, the mount pad is fixed in on the detection platform, the bottom mounting of the type of falling L support, the horizontal part on type of falling L support top is located the clamp plate tip directly over, hydraulic buffer is fixed in on the horizontal part on type of falling L support top, hydraulic buffer's piston end is towards the upper surface of clamp plate, the fixed block is fixed in on the vertical part of the type of falling L support and is located the clamp plate directly under, the vertical setting of spacing bolt and its bolt head are located the top, spacing bolt threaded connection is on the fixed block.

6. The lithium battery module bottom flatness detection device of claim 1, characterized in that: the pressure plate is evenly distributed with a plurality of dial indicator locking blocks, and each electronic dial indicator is fixedly connected to the corresponding dial indicator locking block.

7. The lithium battery module bottom flatness detection device of claim 1, characterized in that: and the manual reversing valve and the pressure reducing valve of the air cylinder are both arranged on the detection platform.

8. The lithium battery module bottom flatness detection device of claim 1, characterized in that: the data acquisition system comprises a computer and a concentrator, and output data lines of a plurality of electronic dial gauges are connected with the computer through the concentrator.

9. The lithium battery module bottom flatness detection device of claim 1, characterized in that: the detection platform is fixedly provided with an electric cabinet, and the air cylinder and the electronic dial indicators are connected with the electric cabinet to realize power supply.

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