CN214893161U

CN214893161U - Approximate constant-pressure high-precision expansion displacement testing device

Info

Publication number: CN214893161U
Application number: CN202121302480.9U
Authority: CN
Inventors: 李树伟
Original assignee: Shanghai Tianhe Automation Instrumentation Co ltd
Current assignee: Shanghai Tianhe Automation Instrumentation Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-11-26
Anticipated expiration: 2031-06-10

Abstract

The utility model discloses an approximate constant voltage high accuracy inflation displacement testing arrangement, including fixed plate, surveyed electric core and treater, a plurality of support columns of top fixedly connected with of fixed plate, bottom sliding connection between a plurality of support columns has the powerful transmission board, and middle part sliding connection between a plurality of support columns has the application of force board, and top sliding connection between a plurality of support columns has the roof, the top of support column is equipped with adjusting nut, and the outer wall that the support column is located between power transmission board and the application of force board cup joints the powerful transmission spring. The utility model discloses a twist and move adjusting nut and come manual regulation pretension pressure, then exert the pretightning force on being surveyed electric core through the roof, force transmission spring is exerted with the pretightning force to rethread application of force board to reaction force through force transmission spring self reaches approximate constant pressure, thereby can manually adjust required pretension pressure and keep pressure to be in approximate invariable as required.

Description

Approximate constant-pressure high-precision expansion displacement testing device

Technical Field

The utility model relates to a high accuracy inflation displacement testing arrangement technical field especially relates to an approximate constant pressure high accuracy inflation displacement testing arrangement.

Background

The lithium ion power battery has the advantages of long cycle life, environmental friendliness and the like, and is widely applied to the fields of electronic equipment, electric automobiles and the like. Taking the electric automobile field as an example, the lithium ion power battery has become the key for developing the electric automobile. In the process of charging and discharging the lithium ion power battery, the battery core expands due to electrochemical reaction generated inside the battery core, and the volume of the battery core can exhibit certain proportion of expansion deformation. Such volume expansion and displacement deformation can damage the cell packaging device, and at the same time, can have a very adverse effect on the service life and performance of the lithium ion power battery, so it is a key subject of battery developers to know the expansion deformation of the battery.

At present, a related measuring clamp generally adopts two clamping plates to clamp a battery cell at fixed and unchangeable unknown pre-tightening pressure, and a vernier caliper is used for measuring the distance between the two clamping plates to obtain the expansion deformation of the battery cell, so that the measuring error of the method is large, the measuring result is inaccurate, and the real expansion deformation of the battery cell under the action of different pressures cannot be measured. In view of this, we propose a high-precision cell expansion displacement measuring device with an approximate constant pressure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing an approximate constant pressure high-precision expansion displacement testing device.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an approximate constant voltage high accuracy inflation displacement testing arrangement, includes the fixed plate, is surveyed electric core and treater, a plurality of support columns of top fixedly connected with of fixed plate, the bottom sliding connection between a plurality of support columns has the power transmission board, and middle part sliding connection between a plurality of support columns has the application of force board, and top sliding connection between a plurality of support columns has the roof, the top of support column is equipped with adjusting nut, and the outer wall that the support column is located between power transmission board and the application of force board cup joints power transmission spring, the equal fixedly connected with support frame in both sides at fixed plate top, the top of support frame are passed power transmission board fixed connection and are had displacement sensor.

As a further proposal of the utility model, the tested electric core is arranged at the top of the force application plate.

As the utility model discloses further scheme again, the top fixedly connected with force cell sensor and the time-recorder of fixed plate, the processor is fixed at the top of fixed plate, and force cell sensor and the contact of power transmission board, processor and force cell sensor, time-recorder and displacement sensor electric connection.

As the utility model discloses further scheme again, the top of application of force board is equipped with two perforation, and displacement sensor's probe passes the perforation and is surveyed electrical core contact.

As the utility model discloses further scheme again, the both sides at roof top all are equipped with the slide opening, and sliding connection has the slider in the slide opening, the bottom fixedly connected with limiting plate of slider, limiting plate and the contact of being surveyed the electrical core, the top fixedly connected with stopper of slider, the spacing spring of one side fixedly connected with of stopper, the other end fixedly connected with fixed block of spacing spring, the bottom of fixed block and the top fixed connection of roof.

As a further proposal of the utility model, the top of the top plate is fixedly connected with a pull rod.

As a further proposal of the utility model, the top fixedly connected with gag lever post of application of force board.

As a further proposal, the bottom of the fixed plate is fixedly connected with an antiskid plate.

The utility model has the advantages that:

1. the utility model discloses a twist and move adjusting nut and come manual regulation pretension pressure, then exert the pretightning force on being surveyed electric core through the roof, force transmission spring is exerted with the pretightning force to rethread application of force board to reaction force through force transmission spring self reaches approximate constant pressure, thereby can manually adjust required pretension pressure and keep pressure to be in approximate invariable as required.

2. The utility model discloses a reading displacement sensor's numerical value, just can directly obtaining the inflation displacement value of being surveyed each region of electric core, consequently can carry out automatic measure to the inflation displacement, it is more accurate than the manual measurement to use a plurality of displacement sensors to detect the condition that can also effectually detect out the electric core and drum partially together.

3. The utility model discloses a cooperation setting of gag lever post and limiting plate can carry on spacingly to the position of being surveyed electric core and placing, guarantees to be surveyed the electric core and places the center at application of force board to it is inhomogeneous to avoid application of force board atress, reduces the accuracy of test result.

Drawings

Fig. 1 is a schematic front view of a near-constant pressure high-precision expansion displacement testing device provided by the present invention;

fig. 2 is a schematic side view of the near-constant pressure high-precision expansion displacement testing device of the present invention;

fig. 3 is a schematic view of a top view structure of an approximate constant pressure high-precision expansion displacement testing device provided by the present invention.

Fig. 4 is the utility model provides an approximate constant pressure high accuracy inflation displacement testing arrangement's enlarged structure schematic diagram of a department.

In the figure: 1. a displacement sensor; 2. a support frame; 3. a force sensor; 4. a fixing plate; 5. a support pillar; 6. a force transfer plate; 7. a force transfer spring; 8. a force application plate; 9. a tested electric core; 10. a top plate; 11. adjusting the nut; 12. a processor; 13. a timer; 14. an anti-skid plate; 15. a pull rod; 16. a limiting rod; 17. a slider; 18. a slide hole; 19. a limiting block; 20. a limiting plate; 21. a fixed block; 22. and a limiting spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. It should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and their meaning in the context of this patent may be understood by those skilled in the art as appropriate.

Referring to fig. 1-4, a high-precision expansion displacement testing device with approximately constant pressure comprises a fixing plate 4, a tested electric core 9 and a processor 12, wherein the top of the fixing plate 4 is fixed with a plurality of supporting columns 5 through bolts, the bottoms of the supporting columns 5 are slidably connected with a force transmission plate 6, the middle parts of the supporting columns 5 are slidably connected with a force application plate 8, the tops of the supporting columns 5 are slidably connected with a top plate 10, the top ends of the supporting columns 5 are provided with adjusting nuts 11, the adjusting nuts 11 are screwed to manually adjust pre-tightening pressure, the outer wall of each supporting column 5, which is positioned between the force transmission plate 6 and the force application plate 8, is sleeved with a force transmission spring 7, the pre-tightening force is applied to the tested electric core 9 through the top plate 10, the pre-tightening force is applied to the force transmission spring 7 through the force application plate 8, and the self reaction force of the force transmission spring 7 reaches approximately constant pressure, both sides at fixed plate 4 top all are fixed with support frame 2 through the bolt, and the top of support frame 2 passes power transmission plate 6 and is fixed with displacement sensor 1 through the bolt, through reading displacement sensor 1's numerical value to carry for treater 12 and handle, thereby obtain the expansion displacement value of being surveyed each region of electrical core 9.

In the utility model, the tested electric core 9 is placed on the top of the force application plate 8, the top of the fixing plate 4 is fixed with a force measuring sensor 3 and a timer 13 through bolts, a processor 12 is fixed on the top of the fixing plate 4, force is applied to a force transmission plate 6 through a force transmission spring 7 and is finally transmitted to the force measuring sensor 3, the force measuring sensor 3 is contacted with the force transmission plate 6, the processor 12 is electrically connected with the force measuring sensor 3, the timer 13 is electrically connected with a displacement sensor 1, the model of the processor 12 is ARM9TDMI, the model of the force measuring sensor 3 is JYB-KB-CW-2000, the model of the timer 13 is QY3054, the model of the displacement sensor 1 is MPS, the top of the force application plate 8 is provided with two perforations, a probe of the displacement sensor 1 passes through the perforations to be contacted with the tested electric core 9, both sides of the top plate 10 are provided with slide holes 18, a slide block 17 is slidably connected in the slide holes 18, bolt fastening is passed through to slider 17's bottom and is had limiting plate 20, limiting plate 20 and the contact of being surveyed electric core 9, bolt fastening is passed through at slider 17's top and is had limiting block 19, bolt fastening is passed through to limiting block 19's one side has limiting spring 22, make limiting plate 20 and the contact of being surveyed electric core 9 under limiting spring 22's effect, limiting spring 22's the other end has fixed block 21 through bolt fastening, fixed block 21's bottom and the top fixed connection of roof 10, bolt fastening is passed through at roof 10's top has pull rod 15, bolt fastening is passed through at application of force plate 8's top has limiting rod 16, carry on spacingly to the position that is surveyed electric core 9 and places through limiting rod 16 and limiting plate 20, guarantee to be surveyed electric core 9 and place the center at application of force plate 8, there is antiskid ribbed tile 14 bottom through bolt fastening of fixed plate 4.

The working principle is as follows: when in use, firstly, the pull rod 15 is held by hands and pulled upwards, so that the top plate 10 is pulled to move upwards, the tested electric core 9 is placed on the force application plate 8, then the position where the tested electric core 9 is placed is limited through the limiting rod 16 and the limiting plate 20, the tested electric core 9 is ensured to be placed in the center of the force application plate 8, then the adjusting nut 11 is screwed to manually adjust the pre-tightening pressure, then the pre-tightening force is applied to the tested electric core 9 through the top plate 10, the pre-tightening force is applied to the force transmission spring 7 through the force application plate 8, the self reaction force of the force transmission spring 7 reaches approximately constant pressure, then the force is applied to the force transmission plate 6 through the force transmission spring 7 and is finally transmitted to the force measurement sensor 3, then the information is transmitted to the processor 12 for processing, finally, the measured value of the expansion force is obtained, and meanwhile, the numerical value of the displacement sensor 1 is read, and is transmitted to the processor 12 for processing, so as to obtain the expansion displacement value of each area of the tested electric core 9, and meanwhile, the processor 12 controls the timer 13 to carry out timing.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A high-precision expansion displacement testing device with approximate constant pressure comprises a fixing plate (4), a tested electric core (9) and a processor (12), it is characterized in that the top of the fixed plate (4) is fixedly connected with a plurality of supporting columns (5), the bottoms of the supporting columns (5) are connected with a force transmission plate (6) in a sliding way, the middle parts of the supporting columns (5) are connected with a force application plate (8) in a sliding way, the tops of the supporting columns (5) are connected with a top plate (10) in a sliding way, the top end of the supporting column (5) is provided with an adjusting nut (11), the outer wall of the supporting column (5) between the force transfer plate (6) and the force application plate (8) is sleeved with a force transfer spring (7), the equal fixedly connected with support frame (2) in both sides at fixed plate (4) top, force transmission board (6) fixedly connected with displacement sensor (1) is passed at the top of support frame (2).

2. The device for testing high precision expansion displacement with approximate constant pressure according to claim 1, characterized in that the tested electric core (9) is placed on top of the force applying plate (8).

3. The high-precision expansion displacement testing device with the approximate constant pressure and the high precision as claimed in claim 1 is characterized in that a load cell (3) and a timer (13) are fixedly connected to the top of the fixing plate (4), a processor (12) is fixed to the top of the fixing plate (4), the load cell (3) is in contact with the force transmission plate (6), and the processor (12) is electrically connected with the load cell (3), the timer (13) and the displacement sensor (1).

4. The high-precision expansion displacement testing device with the approximate constant pressure and the high precision as claimed in claim 1 is characterized in that the top of the force application plate (8) is provided with two through holes, and a probe of the displacement sensor (1) is in contact with a tested electric core (9) through the through holes.

5. The device for testing the high-precision expansion displacement of the approximate constant pressure force as claimed in claim 1, wherein sliding holes (18) are formed in both sides of the top plate (10), a sliding block (17) is connected in the sliding holes (18), a limiting plate (20) is fixedly connected to the bottom of the sliding block (17), the limiting plate (20) is in contact with the tested battery cell (9), a limiting block (19) is fixedly connected to the top of the sliding block (17), a limiting spring (22) is fixedly connected to one side of the limiting block (19), a fixing block (21) is fixedly connected to the other end of the limiting spring (22), and the bottom of the fixing block (21) is fixedly connected to the top of the top plate (10).

6. The nearly constant pressure high precision expansion displacement test device according to claim 1, characterized in that a pull rod (15) is fixedly connected to the top of the top plate (10).

7. The high-precision expansion displacement testing device with the approximate constant pressure as recited in claim 1, characterized in that a limiting rod (16) is fixedly connected to the top of the force application plate (8).

8. The high precision expansion displacement testing device with approximate constant pressure and high precision as claimed in claim 1 is characterized in that a non-slip plate (14) is fixedly connected to the bottom of the fixing plate (4).