Thickness measuring device for soft package lithium battery

Abstract

The utility model relates to a thickness measuring device for a soft package lithium battery. The thickness measuring device for the soft package lithium battery comprises a rack; the bearing component comprises a bearing platform and a bearing driving mechanism, the bearing platform is provided with a bearing surface for placing the soft package lithium battery, the bearing platform is in sliding connection with the rack in the transverse direction, and the bearing driving mechanism is used for driving the bearing platform to slide back and forth relative to the rack in the transverse direction; the pressure applying component comprises a pressure applying piece and a lifting mechanism, the pressure applying piece is in sliding connection with the rack in the longitudinal direction, and the lifting mechanism is used for driving the pressure applying piece to slide back and forth relative to the rack in the longitudinal direction so that the pressure applying piece can abut against the soft package lithium battery located on the bearing face; and the displacement sensor is used for measuring the displacement of the pressure applying piece, and the displacement sensor is arranged on the rack. According to the scheme provided by the invention, the measurement precision can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium batteries, in particular to a thickness measuring device for soft package lithium batteries. BACKGROUND

[0002] Soft package lithium batteries are the third generation of lithium batteries developed on the basis of original steel shell, aluminum shell and plastic shell batteries. They are widely favored by domestic and foreign users due to their advantages of being lighter, thinner, safer, higher in appearance requirement, higher in energy density, stable in discharge platform, excellent in power performance, and environmentally friendly without pollution. Soft package lithium battery products are widely used in electric vehicles, mobile power sources, digital electronic products, smart wearable products, electric toys and many other fields.

[0003] In the processing of soft package lithium batteries, measuring the thickness of the soft package lithium batteries is a key quality control link. In related technologies, the thickness of the soft package lithium batteries is measured manually using a caliper. This method has low measurement accuracy and efficiency. CONTENT OF THE UTILITY MODEL

[0004] To solve or partially solve the problems in related technologies, the present application provides a thickness measuring device for soft package lithium batteries, which can improve the measurement accuracy.

[0005] The present application provides a thickness measuring device for soft package lithium batteries, comprising: a rack; a bearing component comprising a bearing platform and a bearing driving mechanism, the bearing platform having a bearing surface for placing a soft package lithium battery, the bearing platform being slidably connected to the rack in a transverse direction, the bearing driving mechanism being used to drive the bearing platform to slide back and forth along the transverse direction relative to the rack; a pressure applying component comprising a pressure applying piece and a lifting mechanism, the pressure applying piece being slidably connected to the rack in a longitudinal direction, the lifting mechanism being used to drive the pressure applying piece to slide back and forth along the longitudinal direction relative to the rack, so that the pressure applying piece can press against the soft package lithium battery located on the bearing surface; a displacement sensor for measuring the displacement of the pressure applying piece, the displacement sensor being provided on the rack.

[0006] Further, the lifting mechanism comprises a first driving piece, a traction piece, a fixed pulley and a counterweight piece, the fixed pulley being provided on the rack, one end of the traction piece being connected to the counterweight piece, the other end of the traction piece passing around the fixed pulley and being connected to the pressure applying piece, the first driving piece being used to pull down or loosen the counterweight piece.

[0007] Further, the lifting mechanism further comprises a support rod provided in the longitudinal direction, the support rod being slidably connected to the rack in the longitudinal direction, the counterweight piece being detachably provided on the support rod, the upper end of the support rod being connected to the traction piece, the first driving piece being used to pull down or loosen the lower end of the support rod.

[0008] Further, the lifting mechanism further comprises a lifting plate slidingly connected with the rack in the longitudinal direction, the first driving member is used for driving the lifting plate to move up and down, the lower end of the supporting rod is provided with a limiting member, and the limiting member is located below the lifting plate.

[0009] The lifting plate can press downward on the limiting member when moving downward, and the lifting plate can drive the supporting rod to move upward under the gravity of the pressing member when moving upward.

[0010] Further, the traction member is a traction rope, and the counterweight member is a weight.

[0011] Further, the bearing driving mechanism comprises a second driving member and a transmission member, and the second driving member drives the bearing platform to move through the transmission member.

[0012] Further, the second driving member is a motor, and the transmission member is a lead screw or a synchronous belt.

[0013] Further, the displacement sensor is arranged above the pressing member, and the displacement sensor has a probe in contact with the upper surface of the pressing member.

[0014] Further, the rack is provided with a transverse sliding rail and a longitudinal sliding rail, the bearing platform is slidingly connected with the transverse sliding rail, and the pressing member is slidingly connected with the longitudinal sliding rail.

[0015] Further, the pressing member has two, and the two pressing members are arranged opposite to each other, and the displacement sensor has two, and the two displacement sensors are arranged one by one corresponding to the two pressing members.

[0016] The technical scheme provided by the present application can have the following beneficial effects: by placing the soft-pack lithium battery to be measured on the bearing surface of the bearing platform, the bearing driving mechanism moves the bearing platform to the measurement station, the lifting mechanism moves the pressing member downward to press the soft-pack lithium battery on the bearing surface, a certain pressure is applied to the soft-pack lithium battery during measurement, thereby providing measurement conditions close to real working conditions, and the measurement result is closer to real data, the measurement precision is improved, and the automation degree and efficiency are higher than manual measurement.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures, and in which:

[0019] Figure 1 is a structural schematic diagram of a thickness measuring device for soft package lithium battery shown in the embodiments of the present application.

[0020] Reference signs:

[0021] 1-frame, 2-bearing component, 21-bearing platform, 22-bearing driving mechanism, 221-second driving piece, 3-pressing component, 31-pressing piece, 32-lifting mechanism, 321-first driving piece, 322-pulling piece, 323-fixed pulley, 324-counterweight piece, 325-supporting rod, 326-lifting plate, 327-screw rod, 328-limiting piece, 4-displacement sensor. DETAILED DESCRIPTION

[0022] Embodiments of the present application will be described in more detail by referring to the drawings. Although embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0023] It should be understood that although the terms "first", "second", "third", etc. can be used in this application to describe various information, these information should not be limited by these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0024] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] Unless otherwise defined, the terms "mounting", "connected", "connecting", "fixed", and "fixedly" are not to be construed as being terminated with a specific manner, for example, can be fixedly connected, can be detachably connected or integrated; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, or can be the internal communication or interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0026] The technical solutions of the embodiments of the application are described in detail below with reference to the drawings.

[0027] Figure 1 is a structural schematic diagram of a thickness measuring device for soft package lithium battery provided by the embodiments of the application.

[0028] As Figure 1 shown, the embodiments of the application provide a thickness measuring device for soft package lithium battery, which comprises a rack 1, a bearing component 2, a pressure applying component 3 and a displacement sensor 4.

[0029] The bearing component 2 comprises a bearing platform 21 and a bearing driving mechanism 22, the bearing platform 21 has a bearing surface for placing the soft package lithium battery, in the embodiment, the bearing surface is arranged in the horizontal direction, and the upper surface of the middle part of the bearing platform 21 is the bearing surface. The bearing platform 21 is slidably connected with the rack 1 in the transverse direction, and the bearing driving mechanism 22 is used to drive the bearing platform 21 to slide back and forth along the transverse direction relative to the rack 1, and the transverse direction is in the horizontal direction. The bearing driving mechanism 22 can drive the bearing platform 21 to move between a loading station and a measuring station, the bearing platform 21 can place the soft package lithium battery on the bearing surface when located at the loading station, and the bearing platform 21 can measure the thickness of the soft package lithium battery when located at the measuring station.

[0030] The pressure applying component 3 comprises a pressure applying piece 31 and a lifting mechanism 32, the pressure applying piece 31 is slidably connected with the rack 1 in the longitudinal direction, and the lifting mechanism 32 is used to drive the pressure applying piece 31 to slide back and forth along the longitudinal direction relative to the rack 1, so that the pressure applying piece 31 can press the soft package lithium battery located on the bearing surface. The longitudinal direction is the upward and downward direction, the pressure applying piece 31 is located above the measuring station, after the bearing platform 21 moves to the measuring station, the pressure applying piece 31 moves downward and presses the soft package lithium battery on the bearing surface, and after the measurement is completed, the pressure applying piece 31 moves upward, so as to take out the soft package lithium battery from the bearing surface, and then the bearing platform 21 moves to the loading station and continues to place the soft package lithium battery to be measured on the bearing surface.

[0031] The displacement sensor 4 is used for measuring the displacement of the pressing member 31, and is arranged on the frame 1. By measuring the displacement of the pressing member 31 when it moves downward to press the soft-pack lithium battery, the thickness of the soft-pack lithium battery can be calculated. For example, when the pressing member 31 moves upward to a preset position, the distance between the lower end of the pressing member 31 and the bearing surface is a fixed value X, and when measuring, the thickness of the soft-pack lithium battery can be obtained by subtracting the displacement of the pressing member 31 when it moves downward to press the soft-pack lithium battery from X.

[0032] By placing the soft-pack lithium battery to be measured on the bearing surface of the bearing platform 21, the bearing driving mechanism 22 moves the bearing platform 21 to the measuring position, and the lifting mechanism 32 moves the pressing member 31 downward to press the soft-pack lithium battery on the bearing surface. When measuring, a certain pressure is applied to the soft-pack lithium battery, thereby providing a measurement condition close to the actual working condition, and the measurement result is closer to the actual data, thereby improving the measurement accuracy and increasing the automation degree and efficiency compared with manual measurement.

[0033] In some embodiments, as shown in Figure 1 The lifting mechanism 32 includes a first driving member 321, a traction member 322, a fixed pulley 323 and a counterweight 324. The fixed pulley 323 is arranged on the frame 1, one end of the traction member 322 is connected with the counterweight 324, the other end of the traction member 322 passes through the fixed pulley 323 and is connected with the pressing member 31, and the first driving member 321 is used for pulling down or releasing the counterweight 324.

[0034] Specifically, when the pressing member 31 needs to move upward, the first driving member 321 pulls down the counterweight 324 to move downward, and the counterweight 324 drives the pressing member 31 to move upward through the traction member 322 wound on the fixed pulley 323. When the pressing member 31 needs to move downward, the first driving member 321 releases the counterweight 324, and the counterweight 324 moves upward under the action of the gravity of the pressing member 31, and the pressing member 31 moves downward under the action of its own gravity until it presses the soft-pack lithium battery on the bearing surface. At this time, the counterweight 324 offsets part of the gravity of the pressing member 31 through the traction member 322, so that the pressure of the pressing member 31 on the soft-pack lithium battery is a preset value, and the pressure of the pressing member 31 on the soft-pack lithium battery can be changed by changing the weight of the counterweight 324. The first driving member 321 can slowly release the counterweight 324, that is, the counterweight 324 slowly moves upward, so that the pressing member 31 slowly moves downward, preventing the pressing member 31 from damaging the soft-pack lithium battery due to rapid downward movement.

[0035] In some embodiments, as shown in Figure 1As shown, the lifting mechanism 32 further comprises a support rod 325 arranged in the longitudinal direction, the support rod 325 being slidingly connected with the rack 1 in the longitudinal direction, the counterweight 324 being detachably arranged on the support rod 325, the upper end of the support rod 325 being connected with the traction member 322, and the first driving member 321 being used for pulling down or loosening the lower end of the support rod 325. The counterweight 324 is detachably arranged on the support rod 325, so that the counterweight 324 can be taken off and placed, and the weight of the counterweight 324 on the support rod 325 can be adjusted. The rack 1 can be provided with a sliding groove matched with the support rod 325, so that the support rod 325 can slide up and down in the sliding groove.

[0036] In some embodiments, as Figure 1 As shown, the lifting mechanism 32 further comprises a lifting plate 326 slidingly connected with the rack 1 in the longitudinal direction, the first driving member 321 being used for driving the lifting plate 326 to move up and down, and the lower end of the support rod 325 being provided with a limiting member 328 located below the lifting plate 326.

[0037] When the lifting plate 326 moves downward, the limiting member 328 can be pressed downward; when the lifting plate 326 moves upward, the support rod 325 can be driven to move upward under the action of the gravity of the pressing member 31.

[0038] Specifically, the lifting plate 326 is located below the counterweight 324, the rack 1 can be provided with a sliding groove matched with the lifting plate 326, the lifting plate 326 can slide up and down along the sliding groove, the first driving member 321 can be a motor, the output shaft of the first driving member 321 is provided with a screw rod 327, the screw rod 327 is threadedly connected with the lifting plate 326, the first driving member 321 drives the screw rod 327 to rotate, and the screw rod 327 drives the lifting plate 326 to rise or fall when rotating. The lower end of the support rod 325 penetrates downward through the lifting plate 326, the lifting plate 326 is provided with a slot hole through which the support rod 325 penetrates, the width of the limiting member 328 is greater than the width of the slot hole, so that the limiting member 328 is limited below the lifting plate 326, and the width of the slot hole is greater than the diameter of the support rod 325, so that the support rod 325 and the lifting plate 326 can move up and down relative to each other.

[0039] When the first driving member 321 drives the lifting plate 326 to move downward, the lifting plate 326 presses against the limiting member 328 downward, thereby driving the limiting member 328 and the supporting rod 325 to move downward together, and further driving the pressing member 31 to move upward. When the first driving member 321 drives the lifting plate 326 to move upward, the pressing member 31 moves downward under its own gravity, the supporting rod 325 moves upward under the gravity of the pressing member 31, and the limiting member 328 has upward pressing force on the lifting plate 326. The first driving member 321 drives the lifting plate 326 to move upward slowly, thereby controlling the supporting rod 325 and the pressing member 31 to move slowly through the limiting member 328, until the pressing member 31 presses on the soft-pack lithium battery below, the supporting rod 325 and the limiting member 328 stop moving, and the lifting plate 326 continues to move upward and separates from the limiting member 328.

[0040] In some embodiments, the traction member 322 is a traction rope, specifically a steel rope. The counterweight member 324 is a weight, and the pressure of the pressing member 31 on the soft-pack lithium battery can be adjusted by increasing or decreasing the weight.

[0041] In some embodiments, as shown in Figure 1 The bearing driving mechanism 22 includes a second driving member 221 and a transmission member, and the second driving member 221 drives the bearing platform 21 to move through the transmission member.

[0042] In some embodiments, the second driving member 221 is a motor, and the transmission member is a screw rod or a synchronous belt, which is connected with the bearing platform 21 and the second driving member 221 respectively.

[0043] In some embodiments, the displacement sensor 4 is arranged above the pressing member 31, and the displacement sensor 4 has a probe in contact with the upper surface of the pressing member 31. Specifically, the probe of the displacement sensor 4 can move up and down along the vertical direction and always keeps in contact with the upper surface of the pressing member 31 when the pressing member 31 moves up and down.

[0044] In some embodiments, the rack 1 is provided with a transverse slide rail and a longitudinal slide rail, the bearing platform 21 is in sliding connection with the transverse slide rail and can move along the transverse slide rail, and the pressing member 31 is in sliding connection with the longitudinal slide rail and can move along the longitudinal slide rail.

[0045] In some embodiments, as shown in Figure 1 The pressing member 31 has two pressing members 31 arranged oppositely on the left and right sides, and the displacement sensor 4 has two displacement sensors 4 arranged one-to-one with the two pressing members 31. Specifically, two soft-pack lithium batteries can be placed on the bearing surface each time of measurement, and the two pressing members 31 and the two displacement sensors 4 measure the corresponding soft-pack lithium batteries respectively, and one first driving member 321 can be used to control the up-and-down movement of the two pressing members 31, so that the thickness of two soft-pack lithium batteries can be measured each time, thereby improving the measurement efficiency.

[0046] The solutions of the present application have been described in detail above with reference to the accompanying drawings. In the above-described embodiments, the description of each embodiment is focused on respectively, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments. It should also be known by those skilled in the art that the actions and modules involved in the specification are not necessarily required by the present application. In addition, it can be understood that the steps in the method of the embodiments of the present application can be adjusted, combined and reduced in sequence according to actual needs, and the modules in the device of the embodiments of the present application can be combined, divided and reduced according to actual needs.

[0047] The above has described various embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical application or improvement of the technology in the market, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. A thickness measuring device for a pouch lithium battery, characterized by, The thickness measuring device for soft package lithium battery comprises a rack, a bearing component, a pressing component, and a displacement sensor. The bearing component comprises a bearing platform and a bearing driving mechanism, the bearing platform has a bearing surface for placing soft package lithium battery, the bearing platform is slidably connected with the rack in a transverse direction, and the bearing driving mechanism is used for driving the bearing platform to slide back and forth along the transverse direction relative to the rack. The pressing component comprises a pressing piece and a lifting mechanism, the pressing piece is slidably connected with the rack in a longitudinal direction, the lifting mechanism is used for driving the pressing piece to slide back and forth along the longitudinal direction relative to the rack, so that the pressing piece can press the soft package lithium battery on the bearing surface. The displacement sensor is arranged on the rack and used for measuring the displacement of the pressing piece.

2. The thickness measuring device for soft package lithium battery according to claim 1, wherein the lifting mechanism comprises a first driving piece, a traction piece, a fixed pulley and a counterweight, the fixed pulley is arranged on the rack, one end of the traction piece is connected with the counterweight, the other end of the traction piece passes through the fixed pulley and is connected with the pressing piece, and the first driving piece is used for pulling down or loosening the counterweight.

3. The thickness measuring device for soft package lithium battery according to claim 2, wherein the lifting mechanism further comprises a support rod arranged in the longitudinal direction, the support rod is slidably connected with the rack in the longitudinal direction, the counterweight is detachably arranged on the support rod, the upper end of the support rod is connected with the traction piece, and the first driving piece is used for pulling down or loosening the lower end of the support rod.

4. The thickness measuring device for soft package lithium battery according to claim 3, wherein the lifting mechanism further comprises a lifting plate slidably connected with the rack in the longitudinal direction, the first driving piece is used for driving the lifting plate to move up and down, the lower end of the support rod is provided with a limiting piece, and the limiting piece is located below the lifting plate. When the lifting plate moves downward, the limiting piece can be pressed downward, and when the lifting plate moves upward, the support rod is driven to move upward under the gravity of the pressing piece.

5. The thickness measuring device for soft package lithium battery according to claim 2, wherein the traction piece is a traction rope, and the counterweight is a weight.

6. The thickness measuring device for soft package lithium battery according to claim 1, wherein the bearing driving mechanism comprises a second driving piece and a transmission piece, and the second driving piece drives the bearing platform to move through the transmission piece.

7. The thickness measuring device for soft package lithium battery according to claim 6, wherein the second driving piece is a motor, and the transmission piece is a screw rod or a synchronous belt.

8. The thickness measuring device for soft package lithium battery according to claim 1, wherein the displacement sensor is arranged above the pressing piece, and the displacement sensor has a probe in contact with the upper surface of the pressing piece.

9. The thickness measuring device for soft package lithium battery according to claim 1, wherein ​ ​ ​ ​ ​ ​ ​ ​ The rack is provided with transverse sliding rails and longitudinal sliding rails, the bearing platform is in sliding connection with the transverse sliding rails, and the pressure applying piece is in sliding connection with the longitudinal sliding rails. 10.The thickness measurement device for the pouch-type lithium battery of claim 1, wherein: The pressure applying piece has two pressure applying pieces arranged opposite to each other, and the displacement sensor has two displacement sensors arranged one-to-one with the two pressure applying pieces.

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