Battery cell thickness measurement device under pressure

Abstract

The utility model belongs to the technical field of thickness measuring device, concretely relates to a kind of battery cell pressure thickness measuring device, including the top plate and bottom plate of interval arrangement;Driver, inlay in the top plate, and the output end of the driver is towards the bottom plate;Press block, installed in the output end of the driver, and located between the top plate and the bottom plate;Laser displacement sensor, installed in the press block;The bottom of the press block is provided with through-hole, and the through-hole is matched with the transmitting end of the laser displacement sensor, for real-time monitoring the distance between the press block and the bottom plate.The utility model simplifies thickness measuring device, solves the problem of the bulky existing measuring equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of thickness measuring devices, specifically relating to a battery cell thickness measuring device under voltage. Background Technology

[0002] With the rapid development of industries such as new energy vehicles and energy storage, the requirements for the performance and safety of lithium-ion battery cells are becoming increasingly stringent. Thickness measurement is a crucial step in the production and testing of battery cells, as the uniformity and consistency of cell thickness directly affect the cell's energy density, cycle life, and safety.

[0003] After battery cells roll off the production line, they typically undergo comprehensive electrical or safety performance testing, with thickness measurements required before and after each test to reflect their performance. However, measuring cell thickness using traditional calipers or height gauges often suffers from low accuracy, inefficiency, and unsightly appearances caused by test indentations. Furthermore, current industry requirements mandate pressure measurement of cell thickness, which traditional manual caliper measurements cannot perform under constant pressure clamping conditions, thus failing to accurately reflect the cell's condition in actual use.

[0004] In the process of realizing this utility model, the inventors discovered that the prior art has at least the following problems:

[0005] While existing coordinate measuring machines can meet the requirements of live measurement, they are expensive and bulky, making them unsuitable for testing the electrical or safety performance of small quantities of battery cells outside of production. Utility Model Content

[0006] The purpose of this invention is to provide a battery cell thickness measurement device under voltage, which addresses the shortcomings of existing technologies by simplifying the measurement device and solving the problem of the large size of existing measuring equipment.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A battery cell thickness measurement device includes a top plate and a bottom plate spaced apart; a driver embedded in the top plate with its output end facing the bottom plate; a pressure block installed at the output end of the driver and located between the top plate and the bottom plate; and a laser displacement sensor installed on the pressure block. A through hole is provided at the bottom of the pressure block, which cooperates with the emitting end of the laser displacement sensor for real-time monitoring of the distance between the pressure block and the bottom plate.

[0009] In some possible implementations, the top plate is provided with mounting holes, and the sidewalls of the mounting holes are provided with connecting pieces, which are fixedly connected to the sidewalls of the driver.

[0010] In some possible implementations, there are two connecting pieces, each comprising a parallel portion and a vertical portion connected in sequence, the parallel portion being fixedly connected to the top plate, and the vertical portion being fixedly connected to the side wall of the driver.

[0011] In some possible implementations, the actuator is a cylinder, the cylinder is provided with an air pipe, the air pipe is connected to an air source through a connector, and the cylinder is connected to a solenoid valve or a foot switch.

[0012] In some possible implementations, a groove is provided on one side of the pressure block, the laser displacement sensor is mounted in the groove, and the bottom of the groove communicates with the through hole.

[0013] In some possible implementations, the laser displacement sensor is further provided with a data acquisition port, which is connected to a host computer via a network cable.

[0014] In some possible implementations, the emitting end of the laser displacement sensor is flush with the base plate.

[0015] In some possible implementations, a plurality of screws are provided between the top plate and the bottom plate, and the top plate and the bottom plate are provided with first screw holes around their perimeter that mate with the screws.

[0016] In some possible implementations, a second screw hole is provided in the center of the pressure block, and an anti-collision pad hole is provided at the output end of the cylinder, with the second screw hole and the anti-collision pad hole being connected in a mating manner.

[0017] In some possible implementations, the area of ​​the pressure block is smaller than the area of ​​the base plate, and the area of ​​the battery cell under test is smaller than the area of ​​the pressure block.

[0018] One of the above technical solutions has the following beneficial effects:

[0019] This invention optimizes the thickness measurement device by adding pressure blocks to the top and bottom plates. The driver moves the pressure blocks downward to press the battery cell under test on the bottom plate. When the pressure blocks contact the surface of the battery cell, a laser displacement sensor measures the distance between the pressure blocks and the bottom plate, which is the battery cell thickness. This enables the battery cell to be measured under pressure, reflecting its actual performance. Compared with existing measuring equipment, this invention simplifies the device components, solves the problem of the bulky size of existing measuring equipment, and is easy to operate, thus improving the user experience. Attached Figure Description

[0020] The features, advantages and technical effects of exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0021] Figure 1This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a schematic diagram showing the connection between the pressure block and the driver of this utility model.

[0023] The reference numerals in the attached figures are explained as follows:

[0024] 1-Top plate; 10-Mounting holes;

[0025] 2-Base plate;

[0026] 3-Driver;

[0027] 4-Pressure block; 40-Through hole; 41-Groove;

[0028] 5-Laser displacement sensor; 51-Emitter; 52-Acquisition port;

[0029] 6-Connecting piece; 61-Parallel part; 62-Vertical part;

[0030] 7-Screw. Detailed Implementation

[0031] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0032] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The present invention will be further described in detail below with reference to the accompanying drawings, but this is not intended to limit the present invention.

[0035] Example 1

[0036] While existing coordinate measuring machines can meet the requirements of live measurement, they are expensive and bulky, making them unsuitable for testing the electrical or safety performance of small quantities of battery cells outside of production.

[0037] like Figures 1-2 As shown, the battery cell thickness measurement device of this utility model includes a top plate 1 and a bottom plate 2 spaced apart; a driver 3 embedded in the top plate 1 with its output end facing the bottom plate 2; a pressure block 4 installed at the output end of the driver 3 and located between the top plate 1 and the bottom plate 2; a laser displacement sensor 5 installed on the pressure block 4; and a through hole 40 provided at the bottom of the pressure block 4, which cooperates with the emitting end 51 of the laser displacement sensor 5 to monitor the distance between the pressure block 4 and the bottom plate 2 in real time. This invention optimizes the thickness measurement device by adding pressure blocks 4 to the top plate 1 and the bottom plate 2. The driver 3 drives the pressure blocks 4 to move downward and press the battery cell to be tested on the bottom plate 2. When the pressure blocks 4 come into contact with the surface of the battery cell, the distance between the pressure blocks 4 and the bottom plate 2 is measured by the laser displacement sensor 5. This distance is the thickness of the battery cell, enabling the battery cell to be measured under pressure. This reflects the actual performance of the battery cell. Compared with existing measuring equipment, this invention simplifies the components of the device, solves the problem of the large size of existing measuring equipment, and is easy to operate, which helps to improve the user experience.

[0038] It should be noted that this utility model uses a driver 3 and a laser displacement sensor 5, which is lower in cost and easier to move than existing coordinate measuring machines. It is suitable for thickness testing in various scenarios. Furthermore, the laser displacement sensor 5 is more stable than existing caliper measurements, eliminating errors caused by inconsistent force and measurement positions during manual measurement, while also reducing contact between the sensor and the battery cell. The pressure block 4 has a flat surface and a larger area than the battery cell being measured, resulting in a larger contact area with the battery cell during thickness measurement, which can avoid damaging the aluminum shell or blue film of the battery cell. In addition, the bottom of the pressure block 4 and the top of the base plate 2 can be designed with anti-slip properties to increase friction with the surface of the battery cell, preventing the battery cell from sliding or displacing during measurement, which helps to further improve the accuracy and reliability of the measurement.

[0039] In the battery cell voltage and thickness measuring device according to this utility model, the top plate 1 is provided with a mounting hole 10, and a connecting piece 6 is provided on the side wall of the mounting hole 10. The connecting piece 6 is fixedly connected to the side wall of the driver 3. There are two connecting pieces 6, each including a parallel part 61 and a vertical part 62 connected in sequence. The parallel part 61 is fixedly connected to the top plate 1, and the vertical part 62 is fixedly connected to the side wall of the driver 3. Specifically, the top plate 1 has a hole in the middle to form the mounting hole 10 for placing the driver 3. The connecting piece 6 is bent and has two screw holes on each side, that is, two screw holes are opened on each of the parallel part 61 and the vertical part 62. The position of the screw holes coincides with the screw hole position of the cylinder. The cylinder, the connecting piece 6 and the top cover 1 are mechanically connected by screws.

[0040] In the battery cell thickness measurement device according to this utility model, the driver 3 is a cylinder, which is equipped with an air pipe. The air pipe is connected to an air source through a connector, and the cylinder is connected to a solenoid valve or a foot switch. Specifically, the dual-axis cylinder has sufficient driving force to drive the pressure block 4 downward, which can meet the measurement requirements of the thickness of large-capacity battery cells. The air pipe is connected to the cylinder through an air pipe connector to provide the initial power. The foot switch can be used to realize the up and down displacement of the pressure block 4. In addition, an external air pressure regulating valve can be connected to realize the function of the pressure block 4 outputting different pressures, that is, by connecting an external air pressure regulating valve, different pressure thickness tests can be realized.

[0041] In the battery cell thickness measurement device according to this utility model, a groove 41 is provided on one side of the pressure block 4, and a laser displacement sensor 5 is installed in the groove 41. The bottom of the groove 41 is connected to a through hole 40. Specifically, a groove is added to the side of the pressure block 4 to place the laser displacement sensor 5. At the same time, the bottom of the groove 41 is connected to the through hole 40, which allows the probe of the laser displacement sensor 5 to monitor the distance between the pressure block 4 and the bottom plate 2 through the through hole 40. When the pressure block 4 contacts the surface of the battery cell, the distance it displays is the thickness of the battery cell, thus realizing the measurement of the thickness of the battery cell under pressure.

[0042] In the battery cell thickness measurement device according to this utility model, the laser displacement sensor 5 is also provided with a data acquisition port 52, which is connected to the host computer via a network cable. Specifically, the data acquisition port 52 is connected to the host computer via a Category 4 network cable and displays the distance between the pressure block 4 and the top of the base plate 2 in real time. When the battery cell is pressed, the displayed value is the battery cell thickness.

[0043] The working principle of this utility model is as follows:

[0044] This invention optimizes the thickness measurement device by adding pressure blocks 4 to the top plate 1 and the bottom plate 2. The driver 3 drives the pressure blocks 4 to move downward and press the battery cell to be tested on the bottom plate 2. When the pressure blocks 4 come into contact with the surface of the battery cell, the distance between the pressure blocks 4 and the bottom plate 2 is measured by the laser displacement sensor 5. This distance is the thickness of the battery cell, enabling the battery cell to be measured under pressure. This reflects the actual performance of the battery cell. Compared with existing measuring equipment, this invention simplifies the components of the device, solves the problem of the large size of existing measuring equipment, and is easy to operate, which helps to improve the user experience.

[0045] The operation of the thickness measuring device includes the following steps:

[0046] Step 1: Place the battery cell to be tested between the pressure block 4 and the base plate, ensuring that the battery cell to be tested does not block the laser displacement sensor 5 probe;

[0047] Step 2: Turn on the air source. Connect the air pipe to the cylinder through the air pipe connector to provide the original power. Adjust the air pressure regulating valve to the target pressure. Step on the foot switch or open the solenoid valve switch to make the pressure block 4 move downward and thus press the battery cell under test.

[0048] Step 3: The acquisition port 52 of the laser displacement sensor 5 is connected to the host computer through a Category 4 network cable and displays the distance between the pressure block 4 and the top of the base plate 2 in real time. When the battery cell under test is pressed, the displayed value is the thickness of the battery cell.

[0049] Step 4: Release the foot switch or turn off the solenoid valve switch. The pressure block 4 returns to its initial position. Remove the battery cell and complete the pressure thickness measurement.

[0050] Example 2

[0051] Unlike Embodiment 1, in this embodiment, the emitting end 51 of the laser displacement sensor 5 is flush with the base plate 2, meaning the outlet of the laser displacement sensor 5 is flush with the bottom surface of the base plate 2. This allows the laser displacement sensor 5 to monitor the distance between the pressure block and the base plate in real time. When the pressure block 4 contacts the surface of the battery cell under test, the displayed distance is the battery cell thickness, thus achieving the measurement of the battery cell's thickness under pressure. Multiple screws 7 are provided between the top plate 1 and the base plate 2, and first screw holes that mate with the screws 7 are provided around the top plate 1 and the base plate 2. Specifically, the top cover 1 has countersunk screw holes around its perimeter, and a stable connection to the base plate 2 is achieved through screws and cup-head bolts. Similarly, the base plate 2 has countersunk screw holes around its perimeter, and the screw hole positions of the base plate 2 match the screw hole positions of the top cover 1, achieving a connection to the top cover 1 through screws and cup-head bolts.

[0052] The other structures are the same as in Embodiment 1, and will not be described again here.

[0053] Example 3

[0054] Unlike Embodiment 1, in this embodiment, the pressure block 4 has a second screw hole in its center, and the output end of the cylinder has an anti-collision pad hole. The second screw hole and the anti-collision pad hole are connected by screws to achieve a physical connection. The area of ​​the pressure block 4 is smaller than the area of ​​the base plate 2, and the area of ​​the battery cell under test is smaller than the area of ​​the pressure block 4 to prevent the laser probe from being blocked by the battery cell under test.

[0055] The other structures are the same as in Embodiment 1, and will not be described again here.

[0056] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on this utility model are within the protection scope of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A cell thickness measurement device with voltage measurement, characterized in that, Includes a top plate (1) and a bottom plate (2) spaced apart; A driver (3) is embedded in the top plate (1), and the output end of the driver (3) faces the bottom plate (2); A pressure block (4) is installed at the output end of the driver (3) and located between the top plate (1) and the bottom plate (2); A laser displacement sensor (5) is installed on the pressure block (4); The bottom of the pressure block (4) is provided with a through hole (40), which cooperates with the emitting end (51) of the laser displacement sensor (5) to monitor the distance between the pressure block (4) and the base plate (2) in real time.

2. The cell thickness measurement device according to claim 1, characterized in that: The top plate (1) is provided with a mounting hole (10), and a connecting piece (6) is provided on the side wall of the mounting hole (10). The connecting piece (6) is fixedly connected to the side wall of the driver (3).

3. The cell thickness measurement device under voltage as described in claim 2, characterized in that: The number of connecting pieces (6) is two. Each connecting piece (6) includes a parallel part (61) and a vertical part (62) connected in sequence. The parallel part (61) is fixedly connected to the top plate (1), and the vertical part (62) is fixedly connected to the side wall of the driver (3).

4. The cell thickness measurement device according to claim 1, characterized in that: The driver (3) is a cylinder, the cylinder is equipped with an air pipe, the air pipe is connected to an air source through a connector, and the cylinder is connected to a solenoid valve or a foot switch.

5. The cell thickness measurement device under voltage as described in claim 1, characterized in that: A groove (41) is provided on one side of the pressure block (4), and the laser displacement sensor (5) is installed in the groove (41). The bottom of the groove (41) is connected to the through hole (40).

6. The cell thickness measurement device under voltage as described in claim 1, characterized in that: The laser displacement sensor (5) is also provided with a data acquisition port (52), which is connected to the host computer via a network cable.

7. The cell thickness measurement device according to claim 1, characterized in that: The emitting end (51) of the laser displacement sensor (5) is flush with the base plate (2).

8. The cell thickness measurement device according to claim 1, characterized in that: A plurality of screws (7) are provided between the top plate (1) and the bottom plate (2), and the top plate (1) and the bottom plate (2) are provided with first screw holes that cooperate with the screws (7) around their perimeter.

9. The cell thickness measurement device under voltage as described in claim 4, characterized in that: The pressure block (4) has a second screw hole in the center and the cylinder has an anti-collision pad hole at the output end. The second screw hole and the anti-collision pad hole are connected in a cooperative manner.

10. The cell thickness measurement device according to claim 1, characterized in that: The area of ​​the pressure block (4) is smaller than the area of ​​the base plate (2), and the area of ​​the battery cell to be tested is smaller than the area of ​​the pressure block (4).

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