Pressurizing and thickness measuring device for long battery cell

Abstract

The utility model discloses a pressurizing thickness measuring device for a long battery cell. The pressurizing thickness measuring device comprises a supporting plate for placing the battery cell and a plurality of thickness measuring mechanisms arranged along the length direction of the battery cell, the thickness measuring mechanism comprises a pressing plate which is arranged above the supporting plate and is parallel to the supporting plate, a lifting unit which drives the pressing plate to do lifting motion, and a displacement sensor which is connected to the lifting unit; the lifting unit comprises a lifting rod and a fixing block movably connected to the lifting rod, and the pressing plate is connected with the fixing block in an up-down sliding mode. According to the utility model, multi-area automatic measurement of the battery cell is realized, and compared with manual measurement, the working efficiency is improved, and qualification judgment can be carried out on long battery cells with non-uniform thickness. The displacement sensor is used for detecting the distance change between the displacement sensor and the reference block to obtain the thickness of the battery cell, so that the complexity of manual measurement is avoided. The second slide rail drives the battery cell to enter and exit from the thickness measuring station, operation is convenient, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of battery core production, in particular to a long battery core pressurized thickness measuring device. Background Art

[0002] In the battery production process, the consistency of cell thickness is an important performance indicator, and how to accurately, efficiently and stably detect the thickness of the cell is also an important issue. The traditional test method generally uses a vernier caliper to measure the thickness. When it comes to long cells, it is necessary to measure multiple positions, and then perform data discrimination and calculation. The whole process is time-consuming, inefficient, and there are manual measurement errors. This measurement method cannot meet the needs of large-scale automated production in the battery industry. Utility Model Content

[0003] The purpose of the utility model is to provide a method to solve the problems raised in the above-mentioned background technology and realize automatic measurement of multiple areas of battery cells. Compared with manual measurement, it not only improves work efficiency but also can judge the quality of long battery cells with uneven thickness.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A device for measuring thickness by pressurizing a long battery cell comprises a support plate for placing the battery cell and a plurality of thickness measuring mechanisms arranged along the length direction of the battery cell; the thickness measuring mechanisms comprise a pressing plate arranged above the support plate and parallel to the supporting plate, a lifting unit driving the pressing plate to move up and down, and a displacement sensor connected to the lifting unit; the lifting unit comprises a lifting rod and a fixed block movably connected to the lifting rod, and the pressing plate is connected to the fixed block in an up-and-down sliding manner.

[0006] Furthermore, the lifting rod includes a screw rod and a motor that drives the screw rod to rotate; the fixing block is threadedly connected to the screw rod.

[0007] Furthermore, it also includes a first vertical plate vertically connected to the pressure plate, and a second vertical plate fixedly connected to the fixed block, and the first vertical plate and the second vertical plate are slidably connected via a first slide rail.

[0008] Furthermore, the displacement sensor is arranged at the top of the second vertical plate.

[0009] Furthermore, a reference block is provided at the top of the first vertical plate, and the reference block is located directly below the displacement sensor.

[0010] Furthermore, it also includes a second slide rail arranged below the supporting plate, and the second slide rail is slidably connected to the supporting plate.

[0011] Furthermore, it also includes a limiting block for fixing the battery core, a plurality of positioning holes are opened on the support plate, and the limiting block is connected to the positioning holes through fasteners.

[0012] Furthermore, the number of the thickness measuring mechanisms is at least two.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model realizes multi-area automatic measurement of battery cells, which not only improves work efficiency compared with manual measurement, but also can determine the eligibility of long battery cells with uneven thickness. The displacement sensor detects the change in the distance between itself and the reference block to obtain the thickness of the battery cell, eliminating the tedious manual measurement. The second slide rail drives the battery cell in and out of the thickness measurement station, which is convenient to operate and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the thickness measuring mechanism in the utility model;

[0017] Figure 3 for Figure 2 A side view of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the middle support plate and the second slide rail of the utility model;

[0019] In the figure: 1-battery cell, 2-thickness measuring mechanism, 21-pressing plate, 22-lifting unit, 221-lifting rod, 2211-screw rod, 2212-motor, 222-fixed block, 23-displacement sensor, 3-first vertical plate, 4-second vertical plate, 5-first slide rail, 6-reference block, 7-second slide rail, 8-support plate, 81-positioning hole, 9-limiting block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0022] See also Figure 1-4 , a device for measuring thickness by pressurizing a long battery cell, comprising a support plate 8 for placing a battery cell 1, and a plurality of thickness measuring mechanisms 2 arranged along the length direction of the battery cell 1; the thickness measuring mechanism 2 comprises a pressing plate 21 arranged above the support plate 8 and parallel to the supporting plate 8, a lifting unit 22 for driving the pressing plate 21 to move up and down, and a displacement sensor 23 connected to the lifting unit 22; the lifting unit 22 comprises a lifting rod 221, and a fixed block 222 movably connected to the lifting rod 221, and the pressing plate 21 and the fixed block 222 are connected in an up-and-down sliding manner. When the pressing plate 21 has not yet contacted the battery cell 1, the pressing plate 21 freely hangs down to the lowest position due to its own gravity; when the pressing plate 21 contacts the surface of the battery cell 1, the fixed block 222 continues to fall to the lowest position, and the distance change value between the pressing plate 21 and the displacement sensor 23 is the thickness of the battery cell 1 at that position.

[0023] Furthermore, the lifting rod 221 includes a screw rod 2211 and a motor 2212 for driving the screw rod 2211 to rotate; the fixing block 222 is threadedly connected to the screw rod 2211. The motor 2212 drives the screw rod 2211 to rotate, thereby driving the fixing block 222 to move up and down.

[0024] Furthermore, the thickness measuring device also includes a first vertical plate 3 vertically connected to the pressure plate 21, and a second vertical plate 4 fixedly connected to the fixed block 222. The first vertical plate 3 and the second vertical plate 4 are slidably connected by a first slide rail 5, and the displacement sensor 23 is installed on the upper end of the second vertical plate 4; the lower edge of the second vertical plate 4 is flush with the lower edge of the pressure plate 21, and the second vertical plate 4 stops when it falls to the edge of the support plate 8 and contacts it; reinforcing ribs are provided between the first vertical plate 3 and the pressure plate 21.

[0025] Furthermore, a reference block 6 is provided at the top of the first vertical plate 3, and the reference block 6 is located directly below the displacement sensor 23. The reference block 6 moves synchronously with the pressing plate 21, and the displacement sensor 23 is a laser rangefinder, whose light source is directly projected onto the reference block 6. When the pressing plate 21 has not yet contacted the battery cell 1, the distance between the laser rangefinder and the reference block 6 is a constant value, which is the initial distance; when the pressing plate 21 contacts the battery cell 1, the distance between the laser rangefinder and the reference block 6 changes, and when the lower edge of the second vertical plate 4 contacts the upper surface of the support plate 8, the distance between the pressing plate 21 and the lower edge of the second vertical plate 4 = the distance between the laser rangefinder and the reference block 6 = the thickness of the battery cell 1.

[0026] Furthermore, it also includes a second slide rail 7 disposed below the support plate 8, and the second slide rail 7 is slidably connected to the support plate 8. The support plate 8 can freely enter and exit the thickness measuring station, which is convenient for placing and taking out the battery core.

[0027] Furthermore, it also includes a limit block 9 for fixing the battery cell 1. The support plate 8 is provided with a plurality of positioning holes 81 arranged in an array, and the limit block 9 is connected to the positioning holes 81 through fasteners. The battery cell 1 is fixed on the support plate 8 through the limit block 9.

[0028] Furthermore, the number of thickness measuring mechanisms 2 is at least two, preferably three. By measuring the thickness of different areas of the battery cell 1, the average value is the thickness of the battery cell 1. The regional measurement can also detect battery cells with uneven thickness and improve the pass rate.

[0029] When the utility model is used, the incoming battery cell 1 is fixed on the support plate 8, and the support plate 8 is moved to the thickness measuring station through the second slide rail 7. The motor 2212 drives the fixed block 222 to move downward, and the fixed block 222 drives the pressure plate 21, the reference block 6, the second vertical plate 4 and the displacement sensor 23 to move downward as a whole. When the pressure plate 21 contacts the upper surface of the battery cell 1, the second vertical plate 4 continues to move downward until it falls to the upper surface of the support plate 8 and stops. The distance change value between the displacement sensor 23 and the reference block 6 is the thickness value of the battery cell 1 at this location. The average value of the values ​​measured by the two thickness measuring mechanisms 2 is taken as the overall thickness value of the battery cell 1. If the thickness values ​​measured by the two thickness measuring mechanisms 2 differ too much (exceeding the preset value), the battery cell is marked as a defective product and is removed.

[0030] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0031] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A long battery cell pressure thickness measurement device, characterized in that: The invention comprises a support plate (8) for placing an electric core (1), and a plurality of thickness measuring mechanisms (2) arranged along the length direction of the electric core (1); the thickness measuring mechanism (2) comprises a pressing plate (21) arranged above the support plate (8) and parallel to the supporting plate (8), a lifting unit (22) for driving the pressing plate (21) to move upward and downward, and a displacement sensor (23) connected to the lifting unit (22); the lifting unit (22) comprises a lifting rod (221) and a fixing block (222) movably connected to the lifting rod (221); the pressing plate (21) and the fixing block (222) are connected to each other in an upward and downward sliding manner.

2. The long battery cell pressurized thickness measuring device according to claim 1, characterized in that: The lifting rod (221) comprises a screw rod (2211) and a motor (2212) for driving the screw rod (2211) to rotate; the fixing block (222) is threadedly connected to the screw rod (2211).

3. The long battery cell pressurized thickness measuring device according to claim 1, characterized in that: It also comprises a first vertical plate (3) vertically connected to the pressing plate (21), and a second vertical plate (4) fixedly connected to the fixing block (222); the first vertical plate (3) and the second vertical plate (4) are slidably connected via a first slide rail (5).

4. The long battery cell pressurized thickness measuring device according to claim 3, characterized in that: The displacement sensor (23) is arranged at the top end of the second vertical plate (4).

5. The long battery cell pressurized thickness measuring device according to claim 3, characterized in that: A reference block (6) is provided at the top end of the first vertical plate (3), and the reference block (6) is located directly below the displacement sensor (23).

6. The long battery cell pressurized thickness measuring device according to claim 1, characterized in that: It also comprises a second slide rail (7) arranged below the support plate (8), wherein the second slide rail (7) is slidably connected to the support plate (8).

7. The long battery cell pressurized thickness measuring device according to claim 1, characterized in that: It also includes a limiting block (9) for fixing the battery core (1); a plurality of positioning holes (81) are provided on the support plate (8); and the limiting block (9) is connected to the positioning holes (81) via fasteners.

8. The long battery cell pressurized thickness measuring device according to claim 1, characterized in that: The number of the thickness measuring mechanisms (2) is at least two.

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