Battery cell thickness measuring device

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery cell thickness measuring device. The device comprises a base, a pressure sensor, a thickness measurement feeding mechanism, a battery cell limiting mechanism and a thickness measurement assembly, the battery cell limiting mechanism is positioned on the base and comprises a battery cell side surface limiting piece for providing side surface limiting for the battery cell and a battery cell bottom limiting piece for providing bottom limiting for the battery cell; the thickness measuring feeding mechanism comprises a supporting connecting plate which is in sliding connection with the base, a linear driving device which is connected to the base, and a battery cell clamping piece which is positioned on the supporting connecting plate and is over against the battery cell side surface limiting piece; the linear driving device drives the battery cell clamping piece to be close to or away from the battery cell side surface limiting piece; the pressure sensor is positioned between the battery cell and the linear driving device; the thickness measuring assembly measures the thickness of the battery cell. According to the utility model, the consistency of the thickness measurement pressure value and the process requirement during the thickness measurement of the cell can be ensured, and the accuracy of the thickness measurement process is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a battery core thickness measuring device. Background Art

[0002] With the continuous development of the new energy vehicle field, the market demand for power batteries has also expanded, and the production technology of power batteries has been continuously improved. The standards and requirements for the production process and efficiency of lithium batteries have also been improved. Before the single cell is assembled into a module, the cell wrapped in PET film must be tested for thickness under the thickness measurement pressure that meets the process requirements to ensure that the thickness of the cell is within the process requirements.

[0003] At present, the pressure value of battery cell thickness measurement cannot be adjusted along with process changes, and the thickness measurement pressure fluctuates greatly, resulting in a situation where the battery cell thickness measurement value is significantly different from the process requirement range. Utility Model Content

[0004] In order to solve the deficiencies in the prior art, the utility model provides a battery cell thickness measuring device to ensure that the thickness measuring pressure value is consistent with the process requirements during the thickness measuring of the battery cell, avoid the problem that the battery cell thickness value exceeds the error range due to inaccurate pressure during the thickness measuring process, and improve the accuracy of the thickness measuring process.

[0005] In order to solve the deficiencies of the prior art, the technical solution provided by the utility model is:

[0006] A battery cell thickness measuring device comprises a base, a pressure sensor, a thickness measuring feeding mechanism, a battery cell limiting mechanism and a thickness measuring component;

[0007] The battery cell limiting mechanism is located on the base, and includes a battery cell side limiting member for providing side limiting for the battery cell and a battery cell bottom limiting member for providing bottom limiting for the battery cell;

[0008] The thickness measuring feeding mechanism comprises a supporting connecting plate slidably connected to the base, a linear driving device connected to the base, and a battery cell clamping member located on the supporting connecting plate and facing the battery cell side limiter; the linear driving device drives the battery cell clamping member to approach or move away from the battery cell side limiter;

[0009] The pressure sensor is located between the battery cell and the linear drive device;

[0010] The thickness measuring component measures the thickness of the battery cell.

[0011] A further solution of the present application also includes a display screen connected to the thickness measurement component and the pressure sensor signal.

[0012] A further solution also includes a photoelectric switch; the photoelectric switch is connected to the display screen signal.

[0013] A further solution of the present application further includes a limiting mechanism for the driving device;

[0014] The driving device limiting mechanism comprises two driving device limiting vertical plates vertically connected to the base, and a driving device mounting plate horizontally connected to the two driving device limiting vertical plates;

[0015] The linear drive device is arranged horizontally and connected to the drive device mounting plate.

[0016] According to a further solution of the present application, the linear drive device is a cylinder.

[0017] According to a further solution of the present application, the thickness measuring feeding mechanism further includes a guide rail arranged on the base and a slider connected to the guide rail; and the supporting connecting plate is connected to the slider.

[0018] In a further solution, the thickness measurement feeding mechanism further includes a shaft sleeve and a sensor connecting plate;

[0019] The sensor connecting plate is arranged on the supporting connecting plate, one side of which is connected to the battery core clamping member, and the other side of which is connected to the pressure sensor;

[0020] The battery cell clamping piece is a vertically erected marble slab;

[0021] The end of the linear drive device is connected to the pressure sensor through the shaft sleeve.

[0022] In a further solution of the present application, the battery cell limiting mechanism further includes an I-shaped support vertical plate connected to the base and a limiting groove body provided on the I-shaped support vertical plate;

[0023] The cell side limiter is a vertically erected marble plate; the cell side limiter is connected to the I-shaped support plate below, and the side is connected to the limit slot body;

[0024] The bottom limiter of the battery cell is a conductive support bar; the bottom limiter of the battery cell is connected to the I-shaped support vertical plate below, and the side surface is in contact with the side limiter of the battery cell.

[0025] According to a further solution of the present application, the thickness measurement assembly includes an L-shaped mounting plate connected to the base and a displacement sensor located on the L-shaped mounting plate.

[0026] In a further solution of the present application, the pressure sensor, the thickness measurement feed mechanism, the pressure sensor and the thickness measurement assembly are each provided with two groups;

[0027] The battery cell limiting mechanism comprises two groups of battery cell side limiting members and a battery cell bottom limiting member;

[0028] The pressure sensor, the thickness measuring feeding mechanism, the pressure sensor and the thickness measuring component are symmetrically arranged with the battery cell limiting mechanism as the center.

[0029] Beneficial effects of the utility model:

[0030] The utility model ensures that the thickness measurement pressure value is consistent with the process requirement when measuring the thickness of the battery cell through the pressure sensor and the thickness measurement feeding mechanism, avoids the problem that the thickness value of the battery cell exceeds the error range due to inaccurate pressure during the thickness measurement process, and can improve the accuracy of the thickness measurement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a cell thickness measuring device provided by the utility model;

[0032] Among them, 1 is a base; 21 is a limit plate of the driving device; 22 is a mounting plate of the driving device;

[0033] 3 is a thickness measurement feeding mechanism; 31 is a guide rail; 32 is a slider; 33 is a support connecting plate; 34 is a linear drive device; 35 is a shaft sleeve; 37 is a sensor connecting plate; 38 is a battery core clamping piece;

[0034] 4 is the battery cell;

[0035] 5 is a cell limit mechanism; 51 is an I-type support plate; 52 is a limit slot; 53 is a cell side limit member; 54 is a cell bottom limit member;

[0036] 6 is a photoelectric switch;

[0037] 7 is a thickness measurement component; 71 is a displacement sensor; 72 is an L-shaped mounting plate;

[0038] 36 is a pressure sensor. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with the implementation modes. The following implementation modes are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying 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 of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] This embodiment provides a cell thickness measuring device, see Figure 1 , including a base 1, a pressure sensor 36, a thickness measurement feeding mechanism 3, a battery cell limiting mechanism 5 and a thickness measuring assembly 7; the battery cell limiting mechanism 5 is located on the base 1, and includes a battery cell side limiting member 53 for providing side limiting for the battery cell 4 and a battery cell bottom limiting member 54 for providing bottom limiting for the battery cell 4; the thickness measurement feeding mechanism 3 includes a supporting connecting plate 33 slidably connected to the base 1, a linear driving device 34 connected to the base 1, and a battery cell clamping member 38 located on the supporting connecting plate 33 and facing the battery cell side limiting member 53; the linear driving device 34 drives the battery cell clamping member 38 to approach or move away from the battery cell side limiting member 53; the pressure sensor 36 is located between the battery cell 4 and the linear driving device 34; the thickness measuring assembly 7 measures the thickness of the battery cell 4.

[0044] The thickness measuring feeding mechanism 3 is used to drive the thickness measuring assembly 7 and the battery cell clamping member 38 to move, and to clamp the battery cell 4 with a constant pressure within the process range. The thickness measuring assembly 7 is used to measure the thickness of the battery cell 4. The battery cell bottom stopper 54 and the battery cell clamping member 38 limit the battery cell 4.

[0045] When in use, the battery cell 4 is placed on the battery cell bottom stopper 54, with the side close to the battery cell side stopper 53, and between the battery cell side stopper 53 and the battery cell clamping member 38. The battery cell clamping member 38 is driven by the linear drive device 34 to approach the battery cell 4 until it contacts the battery cell 4. The battery cell clamping member 38 is driven by the linear drive device 34 to continue to move and squeeze the battery cell 4. The linear drive device 34 will apply pressure to the battery cell 4. The pressure value applied by the linear drive device 34 on the battery cell 4 is measured in real time by the pressure sensor 36. When the pressure value meets the measurement standard, the linear drive device 34 is locked, and the thickness of the battery cell 4 is measured by the thickness measurement component 7. Therefore, the present application can ensure the pressure size during the thickness measurement process and improve the accuracy of the battery cell thickness measurement data.

[0046] In an optional embodiment of the present invention, see Figure 1 The battery cell thickness measuring device further includes a drive device limiting mechanism 2; the drive device limiting mechanism 2 includes two drive device limiting vertical plates 21 vertically connected to the base 1, and a drive device mounting plate 22 horizontally connected to the two drive device limiting vertical plates 21; the linear drive device 34 is horizontally arranged and connected to the drive device mounting plate 22. The drive device mounting plate 22 is used to fix the linear drive device 34 on the base 1, and the drive device limiting vertical plates 21 are used to fix the drive device mounting plate 22.

[0047] In an optional embodiment of the present invention, see Figure 1 The thickness measuring feeding mechanism 3 further includes a sleeve 35 and a sensor connecting plate 37; the sensor connecting plate 37 is arranged on the supporting connecting plate 33, one side of which is connected to the battery clamp 38, and the other side is connected to the pressure sensor 36; the battery clamp 38 is a vertically erected marble plate; the end of the linear driving device 34 is connected to the pressure sensor 36 through the sleeve 35. The sleeve 35 is used to connect the output end of the linear driving device 34 with the pressure sensor 36.

[0048] In an optional embodiment of the present invention, see Figure 1 The battery cell limiting mechanism 5 also includes two I-shaped support vertical plates 51 connected to the base and a limiting groove body 52 arranged on the front and rear I-shaped support vertical plates 51; the battery cell side limiting piece 53 is a vertically set marble plate; the battery cell side limiting piece 53 is connected to the lower I-shaped support vertical plate 51, and the side is connected to the limiting groove body 52; the battery cell bottom limiting piece 54 is a conductive support bar; the battery cell bottom limiting piece 54 is connected to the lower I-shaped support vertical plate 51, and the side is in contact with the battery cell side limiting piece 53.

[0049] In an optional embodiment of the present invention, see Figure 1The linear drive device 34 is a cylinder. The piston rod of the cylinder drives the shaft sleeve 35, the pressure sensor 36, the sensor connecting plate 37, the battery core clamping member 38, and the supporting connecting plate 33 to move as a whole.

[0050] In an optional embodiment of the present invention, see Figure 1 The thickness measuring feeding mechanism 3 also includes a guide rail 31 arranged in the U-shaped groove of the base 1, two sliders 32 connected to the guide rail 31; and a supporting connecting plate 33 connected to the two sliders 32. The guide rail 31, the slider 32, and the supporting connecting plate 33 are used to support and guide the feeding movement of the thickness measuring feeding mechanism 3.

[0051] In an optional embodiment of the present invention, see Figure 1 The thickness measuring assembly 7 includes an L-shaped mounting plate 72 connected to the base 1 and a displacement sensor 71 located on the L-shaped mounting plate 72 .

[0052] In an optional embodiment of the utility model, the battery cell thickness measuring device further comprises a display screen connected to the linear drive device 34, the thickness measuring component 7, and the pressure sensor 36. The pressure value applied by the linear drive device 34 on the battery cell 4 and the battery cell thickness value measured by the thickness measuring component 7 are displayed in real time on the display screen, making the testing process more convenient and quick.

[0053] In an optional embodiment of the present invention, see Figure 1 The cell thickness measuring device further includes a photoelectric switch 6; the photoelectric switch 6 is connected to the rear I-shaped support plate. The photoelectric switch 6 is connected to the display screen signal. The photoelectric switch 6 is used to detect whether there is a cell 4 on the cell bottom limiter 54. When the cell 4 is in place after detection, the cell 4 can be displayed on the display screen.

[0054] In an optional embodiment of the present invention, see Figure 1 , the pressure sensor 36, the thickness measuring feed mechanism 3, the pressure sensor 36 and the thickness measuring assembly 7 are each provided with two groups; the battery cell limiting mechanism 5 includes two groups of battery cell side limiting members 53 and battery cell bottom limiting members 54; the pressure sensor 36, the thickness measuring feed mechanism 3, the pressure sensor 36 and the thickness measuring assembly 7 are symmetrically arranged with the battery cell limiting mechanism 5 as the center. That is, the utility model can be designed as a double-station measuring device. Of course, by extending the length of the two groups of battery cell side limiting members 53 and the battery cell bottom limiting members 54, and respectively arranging two or more groups of pressure sensors 36, thickness measuring feed mechanisms 3, pressure sensors 36 and thickness measuring assemblies 7 on the same side of the battery cell side limiting members 53, the utility model can also be designed as a four-station or six-station measuring device.

[0055] Usage process:

[0056] The square single battery cell 4 is placed on the conductive support bar 54, and the photoelectric switch 6 detects that the battery cell 4 is in place. The displacement of the cylinder piston rod drives the entire sleeve 35, the pressure sensor 36, the sensor connecting plate 37, the battery cell clamping piece 38, the support connecting plate 33 and the thickness measuring assembly to move toward the battery cell until the battery cell clamping piece 38 and the battery cell side limit piece 53 clamp the entire battery cell 4, and then adjust the cylinder output pressure to control the clamping force of the battery cell 4. When the pressure value measured by the pressure sensor 36 reaches the predetermined thickness measurement pressure value, the displacement sensor starts to record the displacement data to obtain the battery cell thickness value.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A battery cell thickness measuring device, characterized in that: It comprises a base (1), a pressure sensor (36), a thickness measurement feeding mechanism (3), a battery cell limiting mechanism (5) and a thickness measurement component (7); The battery cell limiting mechanism (5) is located on the base (1), and comprises a battery cell side limiting member (53) for providing side limiting for the battery cell (4) and a battery cell bottom limiting member (54) for providing bottom limiting for the battery cell (4); The thickness measuring feeding mechanism (3) comprises a supporting connecting plate (33) slidably connected to the base (1), a linear driving device (34) connected to the base (1), and a cell clamping member (38) located on the supporting connecting plate (33) and facing the cell side limiter (53); the linear driving device (34) drives the cell clamping member (38) to move closer to or away from the cell side limiter (53); The pressure sensor (36) is located between the battery cell (4) and the linear drive device (34); The thickness measuring component (7) measures the thickness of the battery cell (4).

2. The battery cell thickness measuring device according to claim 1, characterized in that: It also includes a display screen connected to the thickness measurement component (7) and the pressure sensor (36) by signal.

3. The battery cell thickness measuring device according to claim 2, characterized in that: It also includes a photoelectric switch (6); the photoelectric switch (6) is connected to the display screen signal.

4. The battery cell thickness measuring device according to claim 1, characterized in that: It also includes a driving device limiting mechanism (2); The driving device limiting mechanism (2) comprises two driving device limiting vertical plates (21) vertically connected to the base (1), and a driving device mounting plate (22) laterally connected to the two driving device limiting vertical plates (21); The linear drive device (34) is arranged horizontally and connected to the drive device mounting plate (22).

5. The battery cell thickness measuring device according to claim 1, characterized in that: The linear drive device (34) is a cylinder.

6. The battery cell thickness measuring device according to claim 1, characterized in that: The thickness measurement feeding mechanism (3) further comprises a guide rail (31) arranged on the base (1), and a sliding block (32) connected to the guide rail (31); the supporting connecting plate (33) is connected to the sliding block (32).

7. The battery cell thickness measuring device according to claim 6, characterized in that: The thickness measurement feeding mechanism (3) further comprises a shaft sleeve (35) and a sensor connecting plate (37); The sensor connection plate (37) is arranged on the support connection plate (33), one side of which is connected to the battery core clamping piece (38), and the other side of which is connected to the pressure sensor (36); The battery cell clamping member (38) is a vertically erected marble plate; An end of the linear drive device (34) is connected to a pressure sensor (36) via the shaft sleeve (35).

8. The battery cell thickness measuring device according to claim 1, characterized in that: The battery cell limiting mechanism (5) further comprises an I-shaped supporting upright plate (51) connected to the base and a limiting groove body (52) provided on the I-shaped supporting upright plate (51); The battery cell side limiter (53) is a vertically erected marble plate; the battery cell side limiter (53) is connected to the I-shaped support vertical plate (51) below, and the side surface is connected to the limit slot body (52); The cell bottom stopper (54) is a conductive support bar; the cell bottom stopper (54) is connected to the I-shaped support vertical plate (51) below, and its side surface is in contact with the cell side stopper (53).

9. The battery cell thickness measuring device according to claim 1, characterized in that: The thickness measurement assembly (7) comprises an L-shaped mounting plate (72) connected to the base (1) and a displacement sensor (71) located on the L-shaped mounting plate (72).

10. The battery cell thickness measuring device according to claim 1, characterized in that: The pressure sensor (36), the thickness measuring feeding mechanism (3), the pressure sensor (36) and the thickness measuring assembly (7) are each provided in two groups; The battery cell limiting mechanism (5) comprises two groups of battery cell side limiting members (53) and a battery cell bottom limiting member (54); The pressure sensor (36), the thickness measuring feeding mechanism (3), the pressure sensor (36) and the thickness measuring assembly (7) are symmetrically arranged with the battery cell limiting mechanism (5) as the center.

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