Lithium battery cell expansion displacement measuring device

Abstract

The utility model provides a lithium battery cell expansion displacement measuring device which comprises a vertical plate, a plurality of detection rods are arranged on the vertical plate in an array mode, each detection rod is provided with a micro driving motor with a corresponding serial number in a connecting channel on the vertical plate, the free end of each detection rod is provided with a stop signal sensor, and the stop signal sensor is connected with the micro driving motor. The device further comprises a controller, the controller is electrically connected with the micro driving motors and the stop signal sensor, when the device is used, the micro driving motors corresponding to the serial numbers are pushed through the controller, and then when the stop signal sensor detects that the stop signal sensor abuts against the lithium battery, the controller controls the micro driving motors to stop driving. And then the working stroke of the micro driving motor with the corresponding number is read through the controller, so that the expansion degree of each part on the same end face of the lithium battery is determined.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery testing technology, specifically to a lithium battery cell expansion displacement measuring device. Background Technology

[0002] Chinese patent document CN217877465U discloses a battery expansion detection device, which includes a base with working boxes at both ends. Clamping plates are movably mounted on the inner sides of both working boxes. A detection pipe is mounted on the working boxes. A first connecting rod and a second connecting rod are movably mounted at both ends of the inner wall of the detection pipe. The outer end of the second connecting rod is threaded to the opening of the detection pipe. A detection rod passes through the second connecting rod, and a third piston block is mounted at the bottom of the detection rod. The detection rod has scale lines indicating the expansion thickness of the battery cell. This invention, by using a detection pipe, allows the battery to press against the clamping plates when detecting battery expansion thickness. The clamping plates move into the detection pipe, compressing the pressure inside, causing the detection rod to slide out synchronously. By observing the scale lines on the sliding detection rod, the battery expansion thickness can be intuitively understood. The structure is simple and easy to use.

[0003] In practical applications, we often encounter the problem of battery expansion. This expansion does not occur uniformly, but rather varies to different degrees on the same battery surface. This phenomenon may result in complex shapes such as wavy bulges with uneven surfaces, or arc-shaped bulges that are convex in the middle and gradually thin out at both ends. These irregular expansion patterns have a direct impact on battery performance and safety. Therefore, accurate detection of the degree of expansion at different parts of the same end face of the battery is particularly important.

[0004] However, the aforementioned and existing battery expansion detection equipment often cannot meet such refined detection requirements. Therefore, in order to better study the degree of expansion at different parts of the same end face of the battery and take corresponding measures to provide important data support for the improvement of battery materials and process optimization, it is necessary to develop a new lithium battery cell expansion displacement measurement device. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to propose a lithium battery cell expansion displacement measuring device to solve the problems mentioned in the background section above.

[0006] This utility model is achieved through the following technical solution:

[0007] A lithium battery cell expansion displacement measuring device includes a vertical plate, an array of multiple probes arranged on the vertical plate, each probe having a corresponding numbered miniature drive motor installed inside a connection channel on the vertical plate, a stop signal sensor at the free end of each probe, and a controller electrically connected to the miniature drive motor and the stop signal sensor.

[0008] Furthermore, it also includes a base plate that is vertically connected to the upright plate, and the base plate is provided with a clamp for fixing and holding the lithium battery.

[0009] Furthermore, the clamp includes a clamping assembly disposed around the base plate. The clamping assembly includes a vertical rod, a transverse screw passing through the vertical rod, a connecting block fixedly connected to the transverse screw, and a plurality of top blocks connected to the connecting block.

[0010] Furthermore, the clamping assembly also includes a connector and a longitudinal screw. The longitudinal screw passes through the connector and is connected to the connecting block. The connector includes two symmetrically arranged plugs. The plugs are embedded in the positioning holes of the top block, and the positioning holes are interference-fitted with the plugs.

[0011] Furthermore, the connector also includes an arc-shaped portion connecting the two plugs, with both ends of the arc-shaped portion bent toward one end of the transverse screw.

[0012] Furthermore, the free end of the top block has a V-shaped forked structure.

[0013] Furthermore, the top block is made of rubber.

[0014] Furthermore, the clamping assembly is slidably connected to the base plate in the horizontal direction.

[0015] Furthermore, the distance between two adjacent probes is 5cm-10cm.

[0016] Furthermore, the stop signal sensor is a pressure sensor or a contact switch sensor.

[0017] The beneficial effects of this utility model are as follows: A lithium battery cell expansion displacement measuring device includes a vertical plate, an array of multiple probes arranged on the vertical plate, each probe having a corresponding numbered micro-drive motor installed inside the connection channel on the vertical plate, and a stop signal sensor installed at the free end of each probe. The device also includes a controller, which is electrically connected to the micro-drive motors and the stop signal sensor. In use, the controller drives the micro-drive motors corresponding to each number. When the stop signal sensor detects that the motor is in contact with the lithium battery, the controller stops the micro-drive motors. The controller then reads the working stroke of the corresponding numbered micro-drive motor to determine the degree of expansion at various points on the same end face of the lithium battery. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention.

[0019] Figure 2 for Figure 1 A magnified view of a portion of the image from direction A.

[0020] Figure 3 This is an exploded view of the clamping component.

[0021] The above figures include the following reference numerals:

[0022] 1. Vertical plate; 11. Probe rod; 12. Stop signal sensor; 2. Clamping assembly; 21. Vertical rod; 22. Horizontal screw; 221. Handle; 23. Connecting block; 24. Top block; 241. Positioning hole; 25. Connector; 251. Plug; 252. Arc-shaped part; 26. Longitudinal screw; 3. Base plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is intended to aid in understanding this utility model, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] Reference Figures 1 to 3As shown, a lithium battery cell expansion displacement measuring device includes a vertical plate 1, on which a plurality of probes 11 are arranged in an array. Each probe 11 is provided with a corresponding numbered miniature drive motor inside the connection channel on the vertical plate 1. Each probe 11 is provided with a stop signal sensor 12 at its free end. The device also includes a controller, which is electrically connected to the miniature drive motor and the stop signal sensor 12.

[0025] The distance between two adjacent probes 11 is 5cm-10cm. By setting a sufficient number of probes 11 on the upright plate 1, the density of the probes 11 is ensured, thereby improving the detection accuracy.

[0026] The stop signal sensor 12 is either a pressure sensor or a contact switch sensor. When the pressure sensor or contact switch sensor comes into contact with the lithium battery, it transmits a signal to the controller. The controller then controls the micro drive motor to stop working. The controller then determines the degree of expansion of each part on the same end face of the lithium battery by reading the working stroke of the micro drive motor with the corresponding number.

[0027] In order to keep the lithium battery fixed during the test, the present invention also proposes the following structure: it further includes a base plate that is vertically connected to the upright plate 1, and the base plate is provided with a clamp for fixing and holding the lithium battery.

[0028] There are various types of clamps, such as pneumatic cylinder clamps, bench vises, quick-release chucks, and so on. However, in order to better secure batteries with irregular expansion shapes, the clamp of this utility model includes the following structure:

[0029] The clamp includes a clamping assembly 2 disposed around the base plate. The clamping assembly 2 includes a vertical rod 21, a transverse screw 22 passing through the vertical rod 21, a connecting block 23 fixedly connected to the transverse screw 22, and a plurality of top blocks 24 connected to the connecting block 23.

[0030] One end of the transverse screw 22 is provided with a handle 221. By rotating the handle 221, the transverse screw 22 is driven to rotate, so that the transverse screw 22 can move in the horizontal direction. Then, the transverse screw 22 drives the connecting block 23 to move, so that the top block 24 fits the lithium battery more tightly, adapts to the irregular expansion shape of the lithium battery, and ensures the fixation of the lithium battery.

[0031] Furthermore, the clamping assembly 2 also includes a connector 25 and a longitudinal screw 26. The longitudinal screw 26 passes through the connector 25 and is connected to the connecting block 23. The connector 25 includes two symmetrically arranged plugs 251. The plugs 251 are embedded in the positioning holes 241 of the top block 24, and the positioning holes 241 are interference-fitted with the plugs 251.

[0032] A longitudinal screw 26 passes through a connector 25 and connects it to a connecting block 23, allowing the connector 25 to rotate horizontally. Then, through an interference fit between the positioning hole 241 and the plug 251, the top block 24 can rotate vertically. This allows the top block 24 to rotate at various angles, further adapting to irregularly expanded lithium batteries and ensuring their secure fixation.

[0033] To better accommodate lithium batteries with irregular expansion shapes, the connector 25 and top block 24 are further defined. Specifically, the connector 25 also includes an arc-shaped portion 252 connecting the two plugs 251, with both ends of the arc-shaped portion 252 bent toward one end of the transverse screw 22.

[0034] In use, the horizontal screw 22 is rotated by rotating the handle 221 until the top block 24 comes into contact with the lithium battery. During the application of pressure, the connector 25 will rotate, so that the top block 24 can better fit the irregularly expanded lithium battery.

[0035] Furthermore, in order to better fit the top block 24 into the irregularly expanded lithium battery, the free end of the top block 24 has a V-shaped forked structure.

[0036] To prevent the top block 24 from damaging the lithium battery due to pressure, the top block 24 is preferably made of rubber.

[0037] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lithium battery cell expansion displacement measuring device, characterized in that: The system includes a stand plate (1), on which a plurality of probes (11) are arranged in an array. Each probe (11) has a corresponding numbered micro drive motor inside the connection channel on the stand plate (1). Each probe (11) has a stop signal sensor (12) at its free end. The system also includes a controller, which is electrically connected to the micro drive motor and the stop signal sensor (12).

2. The lithium battery cell expansion displacement measuring device according to claim 1, characterized in that: It also includes a base plate that is vertically connected to the upright plate (1), and the base plate is provided with a clamp for fixing and holding the lithium battery.

3. The lithium battery cell expansion displacement measuring device according to claim 2, characterized in that: The clamp includes a clamping assembly (2) disposed around the base plate. The clamping assembly (2) includes a vertical rod (21), a transverse screw (22) passing through the vertical rod (21), a connecting block (23) fixedly connected to the transverse screw (22), and a plurality of top blocks (24) connected to the connecting block (23).

4. The lithium battery cell expansion displacement measuring device according to claim 3, characterized in that: The clamping assembly (2) further includes a connector (25) and a longitudinal screw (26). The longitudinal screw (26) passes through the connector (25) and is connected to the connecting block (23). The connector (25) includes two symmetrically arranged plugs (251). The plugs (251) are embedded in the positioning holes (241) of the top block (24). The positioning holes (241) are interference-fitted with the plugs (251).

5. The lithium battery cell expansion displacement measuring device according to claim 4, characterized in that: The connector (25) also includes an arc-shaped portion (252) connecting the two plugs (251), the two ends of which are bent toward one end of the transverse screw (22).

6. The lithium battery cell expansion displacement measuring device according to claim 4, characterized in that: The free end of the top block (24) has a V-shaped forked structure.

7. The lithium battery cell expansion displacement measuring device according to claim 3, characterized in that: The top block (24) is made of rubber.

8. The lithium battery cell expansion displacement measuring device according to claim 3, characterized in that: The clamping assembly (2) is slidably connected to the base plate in the horizontal direction.

9. A lithium battery cell expansion displacement measuring device according to any one of claims 1 to 8, characterized in that: The distance between two adjacent probes (11) is 5cm-10cm.

10. A lithium battery cell expansion displacement measuring device according to any one of claims 1 to 8, characterized in that: The stop signal sensor (12) is a pressure sensor or a contact switch sensor.

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