CN218097683U - Battery thickness testing device - Google Patents

Abstract

The utility model relates to a battery thickness test device. This battery thickness testing arrangement includes: a frame; the testing platform is fixed at the lower part of the rack and is suitable for supporting a battery to be tested; the pressurizing mechanism comprises a pressurizing support fixed on the upper part of the rack in a liftable way and a pressing plate capable of applying pre-pressurizing force to the battery to be tested, and the pressing plate is fixed on the pressurizing support in a removable or movable way; and the testing mechanism comprises a thickness detector which is arranged in the pressurizing bracket in a liftable mode, the thickness detector can abut against the pressing plate to detect the first thickness of the battery to be tested in a pressurized state, and when the pressing plate is moved away from the pressurizing bracket, the thickness detector can extend through the pressurizing bracket and abut against the battery to be tested to detect the second thickness of the battery to be tested in a natural state. The utility model discloses battery thickness test device can conveniently test the thickness of examination battery under compression state and the natural state.

Description

Battery thickness testing device

Technical Field

The utility model relates to a measure technical field, specifically relate to battery thickness testing arrangement.

Background

Lithium batteries are currently one of the most common secondary batteries. The repeated charge-discharge process is realized mainly by the back-and-forth insertion and de-insertion of lithium ions between the positive plate and the negative plate. The lithium battery has the advantages of high working voltage, high energy density, low self-discharge rate, no memory effect and the like. Therefore, the lithium battery is widely applied to the fields of new energy automobiles, mobile communication, aerospace and the like.

According to different packaging modes, lithium batteries can be roughly classified into square batteries, cylindrical batteries, pouch batteries and the like. The square battery is formed by sequentially laminating a positive plate, a diaphragm and a negative plate and then sealing the positive plate, the diaphragm and the negative plate in a square hard shell (such as an aluminum shell, a steel shell and the like); the cylindrical battery is formed by winding a positive plate, a diaphragm and a negative plate and then sealing the positive plate, the diaphragm and the negative plate in a cylindrical hard shell; the soft package battery is formed by sealing a battery cell in a soft shell such as an aluminum plastic film. Regardless of the type of lithium battery, the product specifications play a crucial role in the performance of the lithium battery. The thickness is particularly important for prismatic cells and pouch cells.

At present, devices for measuring the thickness of the lithium battery mainly comprise a caliper, a laser thickness gauge, a torque sensor thickness gauge, a weight-balanced type thickness gauge and the like. Wherein, slide caliper rule and laser thickness gauge can detect the thickness of lithium cell under the natural state, and moment sensor thickness gauge and weight counter weight formula thickness gauge can detect the thickness of lithium cell under the pressurized state. However, any of the above thickness testing devices cannot meet the requirement of simultaneously detecting the thickness of the lithium battery in a natural state and a pressed state.

Therefore, there is a need in the art for a new solution to the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

In order to solve or improve the technical problem that battery thickness testing arrangement can't detect battery thickness under natural state and the compression state simultaneously among the prior art to a certain extent, the utility model provides a battery thickness testing arrangement. This battery thickness testing arrangement includes: a frame; the testing platform is fixed at the lower part of the rack and is suitable for supporting a battery to be tested; the pressurizing mechanism comprises a pressurizing bracket which is fixed at the upper part of the rack in a lifting way and a pressure plate which can apply pre-pressurizing force to the battery to be tested, and the pressure plate is fixed on the pressurizing bracket in a removable or movable way; and the testing mechanism comprises a thickness detector which is arranged in the pressurizing bracket in a liftable mode, can abut against the pressure plate to detect the first thickness of the battery to be tested in a pressurized state, and can extend through the pressurizing bracket and abut against the battery to be tested to detect the second thickness of the battery to be tested in a natural state when the pressure plate is moved away from the pressurizing bracket.

The utility model discloses among the battery thickness testing arrangement, including frame, test platform, loading system and accredited testing organization. Wherein, the frame is the utility model discloses battery thickness testing arrangement's main body frame can provide the fixed stay for other parts. The test platform is fixed at the lower part of the rack and is suitable for supporting a battery to be tested. The pressurizing mechanism comprises a pressurizing bracket which is fixed at the upper part of the frame in a lifting way and a pressure plate which can apply pre-pressurizing force to the battery to be tested. The pressure plate is removably or movably secured to the pressure bracket. The testing mechanism comprises a thickness detector arranged in the pressurizing bracket in a liftable mode. After the pressing plate is fixed on the pressurizing support and applies pre-pressurizing force to the battery to be tested, the thickness detector can abut against the pressing plate, so that the first thickness of the battery to be tested in a pressurized state can be conveniently and accurately detected. In addition, when the pressure plate is moved away from the pressure bracket, the thickness detector can extend through the pressure bracket and directly abut against the battery to be tested, so that the second thickness of the battery to be tested in a natural state can be conveniently and accurately detected. Through the setting, the utility model discloses battery thickness testing arrangement can conveniently measure the thickness of examination battery under natural state and compression state that awaits measuring, has richened the function of product to satisfy the test needs of user differentiation.

In a preferred embodiment of the above battery thickness testing apparatus, the pressing mechanism further includes: a pressurizing motor fixed to the upper portion; and the pressurizing screw rod is respectively connected with the pressurizing motor and the pressurizing bracket, so that the pressurizing bracket is controlled to lift under the driving of the pressurizing motor. The pressurizing motor fixed on the upper part of the frame can conveniently drive the pressurizing screw rod to stretch, so as to drive the pressurizing bracket which is fixedly connected with the pressurizing screw rod to lift.

In a preferred technical solution of the above battery thickness testing apparatus, the pressing mechanism further includes a force value sensor located between the pressing screw rod and the pressing bracket. The pressure of the pressure block applied to the battery to be tested can be accurately quantified by the aid of the force value sensor, and testing accuracy is guaranteed.

In the preferable technical scheme of the battery thickness testing device, at least one sliding rod extending along the vertical direction is arranged on the rack, and a sliding block matched with the corresponding sliding rod is arranged on the pressurizing bracket. The cooperation of slide bar and slider can make the pressure support more smooth-going when going up and down for the frame.

In a preferred embodiment of the above battery thickness test apparatus, the pressure bracket has a lower plate facing the test platform, a through hole allowing the thickness detector to pass therethrough is formed in the lower plate, and the pressure plate is removably or movably fixed to the lower plate. The lower plate is arranged to facilitate the removable or movable fixation of the pressure plate on the pressure bracket. In addition, the lower plate is provided with a through hole for allowing the thickness detector to pass through, so that the thickness detector can conveniently extend through the pressurizing bracket to abut against the battery to be tested.

In a preferred embodiment of the above battery thickness testing apparatus, the testing mechanism further includes: a test fixture for holding the thickness detector; the connecting bracket is fixedly connected with the test bracket; a test motor fixed to the upper portion and spaced apart from the pressurizing motor; and the test screw rod is respectively connected with the test motor and the connecting bracket, so that the lifting of the thickness detector is controlled under the driving of the test motor. The test support can conveniently fix the thickness detector, ensures the stability of thickness detector position. The connecting support is arranged, so that the fixed connection between the test support and the test screw rod can be conveniently formed. The testing motor can conveniently drive the testing screw rod to stretch out and draw back, thereby controlling the lifting of the thickness detector which is fixedly connected with the testing screw rod.

In a preferred embodiment of the above battery thickness testing apparatus, the thickness detector includes a plurality of displacement sensors fixed to the test rack at intervals. Through arranging the plurality of displacement sensors, the thicknesses of different parts of the battery to be tested can be detected simultaneously in a single measurement process, so that the actual thickness of the battery to be tested can be reflected more conveniently, accurately and objectively.

In a preferred embodiment of the above battery thickness testing apparatus, the test support is provided with a plurality of mounting holes spaced apart along a width direction thereof, and each mounting hole is configured to fix the displacement sensor and allow a probe of the displacement sensor to pass therethrough. Through foretell setting, make the utility model discloses battery thickness testing arrangement can adjust displacement sensor's position according to actual need in a flexible way, satisfies the test requirement of the examination battery that awaits measuring of different specifications.

In an optimal technical scheme of the above battery thickness testing device, the connecting bracket includes a cross rod fixedly connected with the testing screw rod, and a first vertical rod and a second vertical rod respectively located at two ends of the cross rod, wherein each of the first vertical rod and the second vertical rod is fixedly connected with the testing bracket. Through foretell setting for linking bridge has simple structure, the processing of being convenient for.

In the preferable technical scheme of the battery thickness testing device, a first supporting bracket and a second supporting bracket which extend along the vertical direction and are opposite to each other are arranged on the rack, a first guide rod matched with the first vertical rod is arranged on the first supporting bracket, and a second guide rod matched with the second vertical rod is arranged on the second supporting bracket. The arrangement of the first supporting bracket and the second supporting bracket can facilitate the installation of the first guide rod and the second guide rod matched with the connecting bracket. In addition, the arrangement of the first guide rod and the second guide rod can enable the connecting support and the test support which is fixedly connected with the connecting support to be smoother in the lifting process.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of an embodiment of the battery thickness testing device of the present invention;

fig. 2 is a schematic structural view of an embodiment of the battery thickness testing apparatus of the present invention, in which a front plate is removed;

fig. 3 is a schematic structural diagram of an embodiment of the battery thickness testing apparatus of the present invention, in which the front plate, the bottom plate and the testing platform are removed;

fig. 4 is a schematic structural diagram of an embodiment of the battery thickness testing apparatus of the present invention, in which the front plate, the bottom plate, the testing platform, and the pressing plate are removed;

fig. 5 is a schematic structural diagram of an embodiment of a pressurizing mechanism and a testing mechanism in the battery thickness testing device of the present invention;

FIG. 6 is a schematic front view of a testing stand and a thickness detector in the battery thickness testing device of the present invention;

fig. 7 is a schematic diagram of the back structure of the testing support and the thickness detector in the battery thickness testing device of the present invention.

Description of the drawings:

1. a battery thickness testing device; 10. a frame; 10a, an upper part; 10b, a lower part; 11. a base plate; 12. a top plate; 13. a front plate; 14. a back plate; 141. a first slide bar; 142. a second slide bar; 20. a test platform; 21. a substrate; 22. a support pillar; 23. placing a sample plate; 231. a screw hole; 30. a pressurizing mechanism; 31. a pressurizing motor; 32. a pressurizing screw rod; 33. a force value sensor; 34. a pressurizing bracket; 341. a lower plate; 3411. a through hole; 342. an upper plate; 3431. a front side outer panel; 3432. a front inner panel; 3441. a rear outer plate; 34411. a first slider; 34412. a second slider; 3442. a rear inner panel; 35. pressing a plate; 40. a testing mechanism; 41. testing the motor; 42. a coupling; 43. testing the screw rod; 431. an outer cylinder; 432. an inner rod; 44. connecting a bracket; 441. a cross bar; 442. a first vertical bar; 443. a second vertical bar; 451. a first support bracket; 4511. a first guide bar; 452. a second support bracket; 4521. a second guide bar; 46. testing the bracket; 461. testing the bracket body; 4611. mounting holes; 46111. a central mounting hole; 46112. a side mounting hole; 462. a first vertical wall; 463. a second vertical wall; 47. a thickness detector; 471. a displacement sensor; 4711. a probe; 2. and (6) testing the battery to be tested.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be directly connected or indirectly connected through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to solve or improve the technical problem that battery thickness testing arrangement can't detect battery thickness under natural state and the pressurized state simultaneously among the prior art to a certain extent, the utility model provides a battery thickness testing arrangement 1. The battery thickness test apparatus 1 includes: a frame 10; a test platform 20, wherein the test platform 20 is fixed at the lower part 10b of the frame 10 and is suitable for supporting the battery 2 to be tested; a pressurizing mechanism 30, wherein the pressurizing mechanism 30 comprises a pressurizing bracket 34 fixed on the upper part 10a of the frame 10 in a lifting way and a pressure plate 35 capable of applying pre-pressurizing force to the battery 2 to be tested, and the pressure plate 35 is fixed on the pressurizing bracket 34 in a removable or movable way; and a testing mechanism 40, wherein the testing mechanism 40 comprises a thickness detector 47 which is arranged in the pressurizing bracket in a liftable way, the thickness detector 47 can abut against the pressure plate 35 to detect the first thickness of the battery 2 to be tested in a pressurized state, and when the pressure plate 35 is moved away from the pressurizing bracket 34, the thickness detector 47 can extend through the pressurizing bracket 34 and abut against the battery 2 to be tested to detect the second thickness of the battery 2 to be tested in a natural state.

In this document, unless explicitly stated to the contrary, the terms "upper", "lower", "left", "right", "front", "back" are based on the orientation shown in fig. 1.

Fig. 1 is a schematic structural diagram of an embodiment of the battery thickness testing apparatus of the present invention. As shown in fig. 1, in one or more embodiments, the battery thickness testing apparatus 1 of the present invention includes a frame 10, a testing platform 20, a pressurizing mechanism 30, a testing mechanism 40, and the like. Wherein the frame 10 has opposite upper and lower portions 10a, 10b. In one or more embodiments, the rack 10 includes a bottom plate 11 and a top plate 12 parallel to each other, and a front plate 13 and a rear plate 14 formed between the bottom plate 11 and the top plate 12 and parallel to each other, so that the entire battery thickness test apparatus 1 has a simple and stable structure. Each of the bottom plate 11, the top plate 12, the front plate 13, and the rear plate 14 has a substantially rectangular shape to enclose an inner space that is substantially square and can accommodate components such as the test stage 20, the pressurizing mechanism 30, and the testing mechanism 40. Each of the bottom plate 11, the top plate 12, the front plate 13 and the rear plate 14 may be made of a metal material such as stainless steel or aluminum alloy, so that the frame 10 has good mechanical strength to prolong the service life thereof. The fixing means between the bottom plate 11, the top plate 12, the front plate 13 and the rear plate 14 may be, but is not limited to, screw connection, welding, etc. In addition, the left and right sides of the rack 10 are configured in an open design, so that the battery 2 to be tested can be conveniently placed and taken from the left or right side of the rack 10. The battery 2 to be tested may be, but is not limited to, a prismatic battery, a pouch battery, etc.

Fig. 2 is a schematic structural diagram of an embodiment of the battery thickness testing apparatus of the present invention, in which a front plate is removed. As shown in fig. 2, the test platform 20 is placed substantially horizontally on the lower portion 10b of the rack 10. In one or more embodiments, the test platform 20 includes components such as a base plate 21, support posts 22, and a template 23. The base plate 21, the supporting columns 22 and the sample placing plate 23 can be made of stainless steel or other suitable metal materials, so that the testing platform 20 has good mechanical strength. The substrate 21 has a substantially rectangular shape. The base plate 21 is horizontally fixed to the bottom plate 11 of the frame 10. The securing means may be, but is not limited to, threaded connections, welding, etc. There are 1 supporting column 22 at each of 4 corners of the base plate 21. In one or more embodiments, each support column 22 has a generally U-shape, and the openings of the support columns 22 on the left and right sides are arranged opposite to each other. Alternatively, the support posts 22 may be provided in other suitable shapes, such as cylindrical, etc. A positioning plate 23 is fixed to the upper portion of the support column 22. The placement plate 23 has a substantially rectangular shape. In one or more embodiments, there are 8 screw holes 231 spaced apart from each other on the sample placement plate 23. Each screw hole 231 is configured to mate with a suitable fastener (e.g., screw, bolt, etc.) such that the placement plate 23 conveniently forms a fixed connection with the support column 22. Alternatively, the number of the screw holes 231 may be set to other suitable numbers more or less than 8. Alternatively, the sample plate 23 and the support column 22 may be fixedly connected by welding or other suitable means. In the assembled state, the sample placing plate 23 has an upper surface (not shown in the drawings) extending in a substantially horizontal direction, so that when the battery 2 to be tested is placed on the upper surface of the sample placing plate 23, the battery 2 to be tested also extends in a substantially horizontal direction, so as to facilitate testing and pressing of the battery 2 to be tested.

Fig. 3 is a schematic structural diagram of an embodiment of the battery thickness testing apparatus of the present invention, in which the front plate, the bottom plate and the testing platform are removed; fig. 4 is a schematic structural diagram of an embodiment of the battery thickness testing apparatus of the present invention, in which the front plate, the bottom plate, the testing platform, and the pressing plate are removed; fig. 5 is a schematic structural diagram of an embodiment of the pressurizing mechanism and the testing mechanism in the battery thickness testing device of the present invention. As shown in fig. 2, the pressing mechanism 30 is disposed at the upper portion 10a of the frame 10. As shown in fig. 2-5, in one or more embodiments, the pressing mechanism 30 includes a pressing motor 31, a pressing screw 32, a force value sensor 33, a pressing bracket 34, and a pressing plate 35. Wherein, the pressurizing motor 31 is fixed in the middle of the top plate 12 of the frame 10. The pressurization motor 31 may be a servo motor, a stepping motor, or other suitable motor. The pressure screw 32 extends substantially in the vertical direction. One end of the pressing screw 32 is fixed to a motor shaft of the pressing motor 31, and the opposite end is fixed to the upper plate 342 of the pressing bracket 34. Through the arrangement, the pressurizing screw rod 32 is controlled to extend or contract under the driving of the pressurizing motor 31, so that the pressurizing bracket 34 is driven to lift along the vertical direction. In one or more embodiments, the force value sensor 33 is disposed between the pressure screw 32 and the upper plate 342 of the pressure bracket 34. The pressure applied to the battery 2 to be tested can be accurately quantified by providing the force value sensor 33, thereby improving the test accuracy.

With continued reference to fig. 2-5, in one or more embodiments, the pressure bracket 34 includes a lower plate 341, an upper plate 342, a front outer plate 3431, a front inner plate 3432, a rear outer plate 3441, and a rear inner plate 3442, among other components. The lower plate 341 and the upper plate 342 are parallel to each other and each have a substantially rectangular shape. The front inner plate 3432 is configured to extend perpendicularly from the front side of the lower plate 341 to the front side of the upper plate 342. Accordingly, the rear inner plate 3442 is configured to extend perpendicularly from the rear side of the lower plate 341 to the rear side of the upper plate 342. In one or more embodiments, the lower plate 341, the upper plate 342, the front inner plate 3432, and the rear inner plate 3442 are integrally formed by a casting process using a suitable metal material (e.g., stainless steel, etc.) to simplify the manufacturing process. In one or more embodiments, a substantially rectangular through hole 3411 is provided in the middle of the lower plate 341, so that the thickness detector 47 of the testing mechanism 40 can easily extend downward out of the pressurizing bracket 34 through the through hole 3411 to abut against the battery 2 to be tested. In one or more embodiments, a plurality of weight-reducing holes (not shown) are provided in each of the front and rear inner plates 3432 and 3442 at intervals to reduce the weight of the pressure bracket 34 as a whole and save machining materials. The front-side outer plate 3431 and the rear-side outer plate 3441 each have a substantially rectangular shape. The front outer panel 3431 is fixed to the front side of the front inner panel 3432, and the rear outer panel 3441 is fixed to the rear side of the rear inner panel 3442. Referring to fig. 5, in one or more embodiments, 2 first blocks 34411 and 2 second blocks 34412 are respectively disposed on the left and right sides of the rear outer plate 3441. The 2 first sliders 34411 are spaced apart from each other in the vertical direction and may be matched with the first slide bars 141 disposed on the rear plate 14 of the frame 10. Accordingly, the 2 second sliders 34412 are spaced apart from each other in the vertical direction and may be matched with the second sliding bar 142 disposed on the rear plate 14 of the frame 10. The first slide bar 141 and the second slide bar 142 each extend in a vertical direction. Through the arrangement, the pressurizing bracket 34 can be lifted and lowered relative to the frame 10 more smoothly. Alternatively, the number of the slide blocks and the slide bars may be configured to be other suitable numbers more or less than 2, such as 1, 3, etc. Instead of this. The arrangement positions of the slider and the slide bar can also be adjusted according to actual needs, for example, the slider is arranged on the front outer plate 3431 and the slide bar is arranged on the front plate 13.

With continued reference to fig. 2 and 3, in one or more embodiments, the platen 35 has a generally rectangular shape. In one or more embodiments, the platen 35 is machined from a suitable metal material, such as stainless steel, to provide good dimensional stability. Alternatively, the platen 35 may be formed by a grinding process using a suitable hard material such as marble. In one or more embodiments, the pressure plate 35 is configured to be removably secured to the lower plate 341 of the pressure bracket 34. Fastening means include, but are not limited to, threaded connection, snap fit, etc. Alternatively, the pressing plate 35 is configured to be movably fixed on the lower plate 341 of the pressing bracket 34. For example, the pressing plate 35 is hinged on the lower plate 341, or the pressing plate 35 is slidably fixed on the lower plate 341, as long as the pressing plate 35 can be fixed on the pressing bracket 34 so as to apply a pre-pressing force to the battery 2 to be tested and can be moved away from the pressing bracket 34 to avoid the thickness detector 47.

As shown in fig. 2, the testing mechanism 40 is disposed at the upper portion 10a of the frame 10 and spaced apart from the pressurizing mechanism 30. As shown in fig. 1-5, in one or more embodiments, the testing mechanism 40 includes a test motor 41, a coupling 42, a test screw 43, a connecting bracket 44, a test bracket 46, and a thickness detector 47. Wherein the test motor 41 is fixed to the top plate 12 of the frame 10 and spaced apart from the pressurizing motor 31. Specifically, the test motor 41 is fixed to the right side of the top plate 12. Alternatively, the test motor 41 may be disposed on the left side of the top plate 12. The test motor 41 includes, but is not limited to, a servo motor, a stepping motor, and the like. The test screw 43 extends substantially in a vertical direction and is connected to a motor shaft of the test motor 41 through a coupling 42. In one or more embodiments, the test screw 43 includes an outer barrel 431 and an inner rod 432 that mate with each other. The outer cylinder 431 is fixedly connected with the connecting support 44, and one end of the inner rod 432 is connected with the coupler 42, so that the inner rod 432 and the outer cylinder 431 generate relative movement under the driving of the test motor 41, and the connecting support 44 connected with the outer cylinder 431 is driven to ascend and descend in the vertical direction.

With continued reference to FIG. 5, in one or more embodiments, the connecting bracket 43 includes a cross-bar 431, a first vertical bar 432, and a second vertical bar 433. The cross bar 431 extends generally in the front-to-rear direction. The first vertical bar 432 and the second vertical bar 433 are respectively disposed at the front and rear ends of the cross bar 431 and each extend in the vertical direction, so that the entire connecting bracket 43 has a substantially "H" shape. In one or more embodiments, a lug (not shown) extending toward the left is formed at the middle of the cross bar 431, and the outer cylinder 431 of the screw 43 extends through the lug and is fixed to the cross bar 431. The first vertical rod 432 and the second vertical rod 433 are respectively and fixedly connected with the testing support 46, so that the testing support 46 can be driven by the testing motor 41 to lift in the vertical direction.

As shown in fig. 3-5, in one or more embodiments, a first support bracket 451 extending in a vertical direction is provided on the front panel 13 of the frame 10. The first support bracket 451 is a U-shaped bracket with an opening to the right. A first guide bar 4511 associated with the first vertical bar 432 is provided on the vertical wall of the first support bracket 451 facing the rear side. Accordingly, a second support bracket 452 extending in a vertical direction is provided on the rear plate 14 of the housing 10. The second support bracket 452 is also a U-shaped bracket having a right opening, and is arranged in the same manner as the first support bracket 451. A second guide bar 4521 associated with the second vertical bar 433 is provided on the front vertical wall of the second support bracket 452. Through the arrangement, the connecting bracket 44 and the test bracket 46 fixedly connected with the connecting bracket 44 can be more stable and smooth when being lifted.

FIG. 6 is a schematic front view of a testing stand and a thickness detector in the battery thickness testing device of the present invention; fig. 7 is a schematic diagram of the back structure of the testing support and the thickness detector in the battery thickness testing device of the present invention. As shown in fig. 6 and 7, in one or more embodiments, the test rack 46 includes a generally horizontally extending and rectangular test rack body 461 and first and second vertical walls 462, 463 extending vertically upward from front and rear sides of the test rack body 461 such that the entire test rack 46 has a generally U-shape. In one or more embodiments, a plurality of mounting holes 4611 are provided on the test stand body 461, spaced apart from each other along the width direction (i.e., left-right direction) thereof. Each mounting hole 4611 may be used to mount a thickness detector 47. In one or more embodiments, there are 1 substantially circular central mounting hole 46111 in the middle of the test stand body 461, and 7 side mounting holes 46112 on the left and right sides of the central mounting hole 46111, respectively. Each of the side mounting holes 46112 is a kidney-shaped hole extending in the front-rear direction. Through the arrangement, the position of the thickness detector 47 can be conveniently adjusted according to actual needs, so that the thicknesses of the batteries 2 to be tested with different specifications can be detected, and the thicknesses of different parts of the same battery 2 to be tested can also be tested. The first vertical wall 462 is connected to the first vertical rod 442 of the connecting bracket 44 and the second vertical wall 463 is connected to the second vertical rod 443 of the connecting bracket 44, so that a fixed connection is formed between the test rack 46 and the connecting bracket 44. Fastening means include, but are not limited to, threaded connections, welding, and the like.

With continued reference to fig. 6 and 7, in one or more embodiments, the thickness detector 47 includes 5 displacement sensors 471 arranged spaced apart from one another on the test rack 46. Of these, 1 displacement sensor 471 is disposed in the central mounting hole 46111 of the test stand 46, and the other 4 displacement sensors 471 are disposed in the corresponding side mounting holes 46112 and located at the four corners of the rectangle. Each displacement sensor 471 has a probe 4711 that extends downwardly through a corresponding mounting hole 4611 to abut against the pressure plate 35 or battery 2 under test located on the lower portion of the test support 46. Alternatively, thickness detector 47 may be configured as other suitable thickness detection devices, such as a laser rangefinder, a CCD rangefinder, or the like.

The utility model discloses battery thickness test device 1 can measure the thickness of examination battery 2 under natural state and the compression state simultaneously according to actual need when using. Specifically, when it is necessary to test the thickness of the battery 2 to be tested in a natural state, the pressing plate 35 is first moved away from the pressing bracket 34. For example, when the pressing plate 35 is detachably mounted on the pressing bracket 34, the pressing plate 35 may be directly detached from the pressing bracket 34 and placed in a position not to prevent the downward movement of the thickness detector 47. Alternatively, when the platen 35 is movably mounted on the pressure bracket 34, the platen 35 may be rotated or translated relative to the pressure bracket 34 to a position away from the pressure bracket 34 and thus away from the thickness detector 47. Next, a standard piece of known thickness is horizontally placed on the placing plate 23 of the test platform 20. Then, the test motor 41 is controlled to rotate in the forward direction to drive the test holder 46 to move downward, and the thickness detector 47 gradually moves toward the standard through the through hole 3411 in the lower plate 341 of the pressurizing holder 34. When the thickness detector 47 abuts on the standard, displacement parameters of different portions of the standard are acquired. After the standard component test is completed, the test motor 41 is controlled to rotate reversely, so that the test bracket 46 moves upwards. Then, the standard part is replaced by the battery 2 to be tested, and the testing process is repeated to obtain the thickness difference between the battery 2 to be tested and the standard part. Finally, a second thickness (including but not limited to an average, maximum, minimum, etc. of the thicknesses) of the battery 2 to be tested is obtained by calculation.

When it is required to test the thickness of the battery 2 to be tested in a pressed state, the pressing plate 35 is first fixed on the lower plate 341 of the pressing bracket 34. Next, a standard piece of known thickness is horizontally placed on the placing plate 23 of the test platform 20. Then, the pressing motor 31 is controlled to rotate in the forward direction, the pressing bracket 34 is driven to move downward, and the pressing plate 35 abuts against the standard member and applies a pressing force thereto. When the force value sensor 33 detects that the pressure applied to the standard by the pressure plate 35 reaches the pre-pressing force, the rotation of the pressing motor 31 is stopped. Then, the test motor 41 is controlled to rotate in the forward direction, the test carriage 46 is driven to move downward, and the thickness detector 47 gradually moves toward the platen 35. When the thickness detector 47 abuts on the pressing plate 35, displacement parameters of different portions of the standard are acquired. After the standard component test is completed, the test motor 41 and the pressurizing motor 31 are respectively controlled to rotate reversely, so that the test bracket 46 and the pressurizing bracket 34 move upwards. Then, the standard piece is replaced by the battery 2 to be tested, and the testing process is repeated to obtain the thickness difference between the battery 2 to be tested and the standard piece. Finally, a first thickness (including but not limited to an average, maximum, minimum, etc. of the thicknesses) of the battery 2 to be tested is obtained by calculation.

It should be noted that the battery thickness testing device 1 of the present invention can also adopt other suitable testing steps to test the thickness of the battery 2 to be tested under the natural state and the pressed state. For example, the thickness of the battery 2 to be tested in a natural state is directly tested using the thickness detector 47 without being compared with a standard component.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (10)

1. A battery thickness testing device, characterized in that the battery thickness testing device comprises:

a frame;

the testing platform is fixed at the lower part of the rack and is suitable for supporting a battery to be tested;

the pressurizing mechanism comprises a pressurizing bracket fixed at the upper part of the rack in a lifting way and a pressure plate capable of applying pre-pressurizing force to the battery to be tested, and the pressure plate is fixed on the pressurizing bracket in a removable or movable way; and

a testing mechanism including a thickness detector liftably arranged within the pressurizing bracket, and

the thickness detector may abut against the pressure plate to detect a first thickness of the battery to be tested in a pressed state, and when the pressure plate is moved away from the pressing bracket, the thickness detector may extend through the pressing bracket and abut against the battery to be tested to detect a second thickness of the battery to be tested in a natural state.

2. The battery thickness testing device according to claim 1, wherein the pressurizing mechanism further comprises:

a pressurizing motor fixed to the upper portion;

and the pressurizing screw rod is respectively connected with the pressurizing motor and the pressurizing bracket, so that the pressurizing bracket is controlled to lift under the driving of the pressurizing motor.

3. The battery thickness testing device of claim 2, wherein the pressure mechanism further comprises a force value sensor between the pressure screw and the pressure bracket.

4. The battery thickness test device according to any one of claims 1 to 3, wherein at least one slide bar extending in a vertical direction is provided on the frame, and a slider matching the corresponding slide bar is provided on the pressurizing bracket.

5. The battery thickness test apparatus according to claim 1, wherein the pressurizing bracket has a lower plate facing the test platform, through-holes allowing the thickness detector to pass therethrough are formed on the lower plate, and the pressing plate is removably or movably fixed on the lower plate.

6. The battery thickness testing apparatus according to claim 2, wherein the testing mechanism further comprises:

a test fixture for holding the thickness detector;

the connecting bracket is fixedly connected with the test bracket;

a test motor fixed to the upper portion and spaced apart from the pressurizing motor;

and the testing screw rod is respectively connected with the testing motor and the connecting bracket, so that the lifting of the thickness detector is controlled under the driving of the testing motor.

7. The battery thickness testing apparatus of claim 6, wherein the thickness detector comprises a plurality of displacement sensors fixed to the test rack at intervals from each other.

8. The battery thickness testing apparatus according to claim 7, wherein a plurality of mounting holes are provided on the test support at intervals in a width direction thereof, each of the mounting holes being configured to fix the displacement sensor and allow a probe of the displacement sensor to pass therethrough.

9. The battery thickness testing device according to claim 6, wherein the connecting bracket comprises a cross bar fixedly connected with the testing screw, and a first vertical bar and a second vertical bar respectively located at two ends of the cross bar, wherein each of the first vertical bar and the second vertical bar is fixedly connected with the testing bracket.

10. The battery thickness testing device according to claim 9, wherein a first support bracket and a second support bracket extending in a vertical direction and facing each other are provided on the rack, a first guide bar that is fitted to the first vertical bar is provided on the first support bracket, and a second guide bar that is fitted to the second vertical bar is provided on the second support bracket.

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