Battery cell thickness screening device

Abstract

The utility model relates to a kind of battery thickness screening device, to solve the current according to the thickness of battery screening requirement by manually adjusting the distance between the upper pressing roller assembly of battery and the lower slide plate of battery, and then the precision of battery screening is lower, the technical problem of the greater error of battery thickness screening, including: base, the top side of base is equipped with mounting plate;Detection component, set in the side of mounting plate, for detecting the thickness of battery;The detection component includes: connecting plate, the bottom end of the connecting plate is vertically fixedly connected with sleeve;Connecting column, the top of the connecting column is slidably inserted into the bottom of the sleeve, and the bottom thereof is vertically fixedly connected with detection plate, the utility model fundamentally solves the problem of low screening precision caused by human operation error in traditional manual adjustment mode by physical quantity conversion and automation control, and realizes the high precision of battery thickness screening.

Description

Technical Field

[0001] This utility model relates to the field of battery cell thickness screening, specifically a battery cell thickness screening device. Background Technology

[0002] New energy vehicles generally use lithium-ion batteries as power batteries, especially prismatic lithium batteries. During the manufacturing process of prismatic lithium batteries, gas is generated inside the cells after charging, formation, and capacity testing, causing the cells to bulge and increase their thickness. When the thickness exceeds a certain range, it affects the module length, resulting in excessively long modules. Therefore, a tooling is needed to quickly screen the cells.

[0003] According to publicly available patent CN215142174U, a battery cell thickness screening device includes a base plate, a battery cell lower slide plate, a support frame, two height adjustment components, and a battery cell upper pressure roller assembly. One end of the battery cell lower slide plate is hinged to the base plate, the top end of the support frame is hinged to the battery cell lower slide plate, and the bottom end of the support frame is supported on the base plate. The two height adjustment components are connected to the upper surface of the battery cell lower slide plate, and the battery cell upper pressure roller assembly is connected between the two height adjustment components. In the process of realizing this utility model, the inventors found that at least the following problems in the prior art have not been solved: by adjusting the battery cell lower slide plate... The tilt angle controls the speed at which the cells slide down the cell slide plate, and the height adjustment component controls the distance between the cell slide plate and the cell upper pressure roller assembly. Cells meeting the thickness requirements can pass through the cell upper pressure roller assembly when placed on the cell slide plate, while cells exceeding the thickness limit cannot pass. This quickly screens cells that meet the thickness requirements, solving the problem of module length exceeding specifications after cell assembly. However, traditional methods involve manually adjusting the distance between the cell upper pressure roller assembly and the cell slide plate according to the cell thickness requirements, resulting in low screening accuracy and large thickness screening errors. Therefore, a new technical solution is needed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a battery cell thickness screening device to solve the technical problem that the current method of manually adjusting the distance between the upper pressure roller assembly and the lower slide plate of the battery cell according to the battery cell thickness screening requirements results in low battery cell screening accuracy and large battery cell thickness screening error.

[0005] To achieve the objective of this utility model, the technical solution adopted is as follows: A battery cell thickness screening device is designed, comprising:

[0006] A base, wherein a mounting plate is installed on one side of the top of the base;

[0007] The detection component, located on one side of the mounting plate, is used to detect the thickness of the battery cell;

[0008] The detection component includes:

[0009] A connecting plate, the bottom end of which is vertically fixedly connected to a sleeve;

[0010] A connecting column, the top of which is slidably inserted into the bottom of the sleeve, and a detection plate is vertically fixed to its bottom;

[0011] A pressure sensor is fixedly installed at the top of the inner cavity of the sleeve, and an elastic element is provided between the pressure sensor and the top of the connecting column;

[0012] A display screen, mounted on the front end of the connecting plate, is electrically connected to the pressure sensor via wires and is used to display pressure data;

[0013] A vertical drive mechanism is disposed between the connecting plate and the mounting plate, and is used to drive the connecting plate to move in the vertical direction to adjust the height position of the detection plate.

[0014] Preferably, it further includes a protective component disposed outside the detection component, the protective component comprising:

[0015] A protective cover is vertically fixed to the bottom of the mounting plate. The protective cover has a hollow cylindrical structure and is fitted onto the outside of the sleeve.

[0016] A movable cover is slidably fitted onto the outside of the protective cover. The movable cover is a hollow cylindrical structure made of transparent material, and the inner diameter of the movable cover is adapted to the outer diameter of the protective cover.

[0017] Preferably, the vertical drive mechanism includes:

[0018] An adjustment groove is vertically formed on the side surface of the mounting plate near the connecting plate. An adjustment block is slidably connected in the adjustment groove, and the adjustment block is fixedly connected to the connecting plate.

[0019] A push rod motor is fixedly installed on the top of the mounting plate. The output shaft of the push rod motor extends vertically downward and slides through the top of the mounting plate. The end of the output shaft is fixedly connected to the top of the adjusting block.

[0020] Preferably, the maximum fitting length between the protective cover and the movable cover is greater than the maximum telescopic length between the sleeve and the connecting column.

[0021] Preferably, each end of the connecting column is provided with a first limiting groove, and each of the two first limiting grooves is slidably connected with a first limiting block, and each of the two first limiting blocks is fixedly connected to the inner wall of the sleeve. Each end of the protective cover is provided with a second limiting groove, and each of the two second limiting grooves is slidably connected with a second limiting block, and each of the two second limiting blocks is fixedly connected to the inner wall of the movable cover.

[0022] Preferably, the sleeve has at least one first vent hole at its side end, the first vent hole penetrating the side wall of the sleeve and communicating with the inner cavity of the sleeve, and the protective cover has at least one second vent hole at its side end, the second vent hole penetrating the side wall of the protective cover and communicating with the inner cavity of the protective cover.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] 1. Pressure Quantification Detection Mechanism: When the detection plate comes into contact with the battery cell and is squeezed, the deformation of the elastic element is converted into an electrical signal by the pressure sensor, forming pressure data corresponding to the thickness of the battery cell, thus avoiding the subjective error of traditional manual measurement;

[0025] 2. Dynamic threshold comparison system: By setting a standard pressure range corresponding to the thickness of qualified battery cells, the real-time detection data is compared with the standard range. When the detection value exceeds the allowable error range, it is automatically judged as a defective product, thus realizing the objectification of the screening process;

[0026] 3. Closed-loop feedback control: The vertical drive mechanism adjusts the downward displacement of the detection plate based on the real-time feedback signal from the pressure sensor, ensuring that the pressure remains constant in each detection process and further improving the consistency of detection accuracy. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the overall side cross-sectional structure of this utility model;

[0029] Figure 3 This is a schematic diagram of the connection structure between the sleeve and the connecting column of this utility model.

[0030] In the diagram: 1. Base; 11. Mounting plate; 2. Push rod motor; 21. Adjustment groove; 22. Adjustment block; 3. Connecting plate; 4. Protective cover; 41. Moving cover; 42. Second limiting groove; 43. Second limiting block; 44. Second air hole; 5. Display screen; 51. Sleeve; 52. Elastic element; 53. Connecting column; 54. Detection plate; 55. Pressure sensor; 56. First air hole; 57. First limiting groove; 58. First limiting block. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0032] Example 1: A cell thickness screening device, see [link to example]. Figures 1 to 3 ,include:

[0033] Base 1, with a mounting plate 11 installed on one side of the top;

[0034] A detection component, located on one side of the mounting plate 11, is used to detect the thickness of the battery cell;

[0035] The detection component includes:

[0036] Connecting plate 3, with sleeve 51 vertically fixedly connected to the bottom end of the connecting plate 3;

[0037] A connecting post 53 is slidably inserted at the top of the sleeve 51 at the bottom, and a detection plate 54 is vertically fixedly connected to its bottom.

[0038] A pressure sensor 55 is fixedly installed at the top of the inner cavity of the sleeve 51. An elastic element 52 is provided between the pressure sensor 55 and the top of the connecting column 53. The elastic element 52 can be a spring.

[0039] The display screen 5 is installed at the front end of the connecting plate 3 and is electrically connected to the pressure sensor 55 via a wire, for displaying pressure data;

[0040] A vertical drive mechanism is disposed between the connecting plate 3 and the mounting plate 11, and is used to drive the connecting plate 3 to move in the vertical direction to adjust the height position of the detection plate 54.

[0041] This device, through its configured detection components, achieves the following during use:

[0042] Pressure quantification detection mechanism: When the detection plate 54 comes into contact with the battery cell and is squeezed, the deformation of the elastic element 52 is converted into an electrical signal by the pressure sensor 55, forming pressure data corresponding to the thickness of the battery cell, thus avoiding the subjective error of traditional manual measurement;

[0043] Dynamic threshold comparison system: By pre-setting the standard pressure range corresponding to the thickness of qualified battery cells, the real-time detection data is compared with the standard range. When the detection value exceeds the allowable error range, it is automatically judged as a defective product, thus realizing the objectification of the screening process.

[0044] Closed-loop feedback control: Based on the real-time feedback signal of the pressure sensor 55, the vertical drive mechanism adjusts the downward displacement of the detection plate 54 by the same distance each time, ensuring that the pressure is constant in each detection process and further improving the consistency of detection accuracy; through physical quantity conversion and automatic control, the problem of low screening accuracy caused by human operation error in the traditional manual adjustment method is fundamentally solved, and high precision of cell thickness screening is achieved.

[0045] For details, see Figure 1 and Figure 2 It also includes a protective component disposed outside the detection component, the protective component comprising:

[0046] The protective cover 4 is vertically fixed to the bottom of the mounting plate 11. The protective cover 4 has a hollow cylindrical structure and is sleeved on the outside of the sleeve 51.

[0047] The movable cover 41 is slidably sleeved on the outside of the protective cover 4. The movable cover 41 is a hollow cylindrical structure made of transparent material, and the inner diameter of the movable cover 41 is adapted to the outer diameter of the protective cover 4. The double-layer sleeve 51 structure of the protective component (protective cover 4 and movable cover 41) effectively prevents external foreign objects from interfering with the detection process, avoids external factors from affecting the detection results, improves the stability and reliability of the equipment, and ensures that the screening accuracy is not affected by the environment. The transparent movable cover 41 allows the operator to observe the detection area in real time, and the double-layer sleeve 51 structure (protective cover 4 and movable cover 41) effectively prevents the battery cell from exploding during the detection and causing injury to the detection personnel.

[0048] Further, see Figure 2 The vertical drive mechanism includes:

[0049] An adjustment groove 21 is vertically formed on the side surface of the mounting plate 11 near the connecting plate 3. An adjustment block 22 is slidably connected in the adjustment groove 21 and is fixedly connected to the connecting plate 3.

[0050] The push rod motor 2 is fixedly installed on the top of the mounting plate 11. The output shaft of the push rod motor 2 extends vertically downward and slides through the top of the mounting plate 11. The end of the output shaft is fixedly connected to the top of the adjusting block 22. Through the cooperation of the adjusting groove 21 and the push rod motor 2, the precise linear movement of the detection plate 54 is realized. Compared with the traditional manual adjustment method, the height position of the detection plate 54 can be controlled more precisely, reducing mechanical errors and further improving the accuracy and consistency of cell thickness screening.

[0051] It is worth noting that, see Figure 2The maximum sleeve length of the protective cover 4 and the movable cover 41 is greater than the maximum telescopic length of the sleeve 51 and the connecting column 53. This is to ensure that the protective component always covers the detection component during the detection process, prevent the protection from failing due to changes in the stroke of the detection component, provide reliable protection throughout the detection process, avoid interference from external factors, and ensure screening accuracy.

[0052] It is worth noting that, see Figure 1 and Figure 3 The connecting column 53 has a first limiting groove 57 at both ends, and a first limiting block 58 is slidably connected in each of the two first limiting grooves 57. The two first limiting blocks 58 are fixedly connected to the inner wall of the sleeve 51. The protective cover 4 has a second limiting groove 42 at both ends, and a second limiting block 43 is slidably connected in each of the two second limiting grooves 42. The two second limiting blocks 43 are fixedly connected to the inner wall of the moving cover 41. Through the sliding fit structure of the first limiting groove 57 and the first limiting block 58, and the second limiting groove 42 and the second limiting block 43, the relative movement of the connecting column 53 and the sleeve 51, and the moving cover 41 and the protective cover 4 are guided and limited, respectively, to prevent the components from shifting or detaching, to ensure the stability and repeatability of the detection process, and thus improve the screening accuracy.

[0053] It is worth mentioning that, see Figure 1 and Figure 2 The sleeve 51 has at least one first air hole 56 on its side end. The first air hole 56 penetrates the side wall of the sleeve 51 and communicates with the inner cavity of the sleeve 51. The protective cover 4 has at least one second air hole 44 on its side end. The second air hole 44 penetrates the side wall of the protective cover 4 and communicates with the inner cavity of the protective cover 4. The air holes on the sleeve 51 and the protective cover 4 are used to balance the air pressure inside and outside the sleeve 51 and the protective cover 4, so as to avoid the deformation accuracy of the elastic element 52 due to air pressure changes, and ensure that the pressure sensor 55 accurately measures the pressure value corresponding to the thickness of the battery cell, thereby further improving the accuracy of thickness screening.

[0054] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0055] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A battery cell thickness screening device, characterized in that, include: A base (1) is provided with a mounting plate (11) on one side of its top. A detection component is disposed on one side of the mounting plate (11) for detecting the thickness of the battery cell; The detection component includes: A connecting plate (3) is vertically fixed to the bottom end of which a sleeve (51) is attached. A connecting column (53) is slidably inserted at the top of the sleeve (51) and a detection plate (54) is vertically fixedly connected to its bottom. A pressure sensor (55) is fixedly installed at the top of the inner cavity of the sleeve (51), and an elastic element (52) is provided between the pressure sensor (55) and the top of the connecting column (53). The display screen (5) is installed at the front end of the connecting plate (3) and is electrically connected to the pressure sensor (55) via a wire to display pressure data; A vertical drive mechanism is provided between the connecting plate (3) and the mounting plate (11) to drive the connecting plate (3) to move in the vertical direction in order to adjust the height position of the detection plate (54).

2. The cell thickness screening device as described in claim 1, characterized in that, It also includes a protective component disposed outside the detection component, the protective component comprising: The protective cover (4) is vertically fixed to the bottom of the mounting plate (11). The protective cover (4) has a hollow cylindrical structure and is sleeved on the outside of the sleeve (51). The movable cover (41) is slidably sleeved on the outside of the protective cover (4). The movable cover (41) is a hollow cylindrical structure made of transparent material, and the inner diameter of the movable cover (41) is adapted to the outer diameter of the protective cover (4).

3. The cell thickness screening device as described in claim 1, characterized in that, The vertical drive mechanism includes: An adjustment groove (21) is vertically opened on one side surface of the mounting plate (11) near the connecting plate (3). An adjustment block (22) is slidably connected in the adjustment groove (21), and the adjustment block (22) is fixedly connected to the connecting plate (3). A push rod motor (2) is fixedly installed on the top of the mounting plate (11). The output shaft of the push rod motor (2) extends vertically downward and slides through the top of the mounting plate (11). The end of the output shaft is fixedly connected to the top of the adjusting block (22).

4. The cell thickness screening device as described in claim 2, characterized in that, The maximum sleeve length of the protective cover (4) and the movable cover (41) is greater than the maximum telescopic length of the sleeve (51) and the connecting column (53).

5. The cell thickness screening device as described in claim 4, characterized in that, Both ends of the connecting column (53) are provided with first limiting grooves (57), and both first limiting blocks (58) are slidably connected in the two first limiting grooves (57). Both first limiting blocks (58) are fixedly connected to the inner wall of the sleeve (51). Both ends of the protective cover (4) are provided with second limiting grooves (42), and both second limiting grooves (42) are slidably connected in the two second limiting grooves (42). Both second limiting blocks (43) are fixedly connected to the inner wall of the movable cover (41).

6. The cell thickness screening device as described in claim 5, characterized in that, The sleeve (51) has at least one first air hole (56) at its side end. The first air hole (56) penetrates the side wall of the sleeve (51) and communicates with the inner cavity of the sleeve (51). The protective cover (4) has at least one second air hole (44) at its side end. The second air hole (44) penetrates the side wall of the protective cover (4) and communicates with the inner cavity of the protective cover (4).

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