Battery cell pressure expansion displacement detection jig

Abstract

The utility model provides a battery cell pressure expansion displacement detection tool, which comprises an upper pressing plate, a guide pillar, a displacement detection part, a middle plate, a top plate, a spring, a linear bearing, a test tool part, a pressure expansion detection part, a lower bottom plate and a lower pressing plate. The precision of control output is enhanced while data is detected and collected through the pressure expansion detection sensor and the displacement sensor, it is ensured that the precision of the data obtained after detection can be guaranteed, the space utilization rate is extremely high, needed data can be accurately collected and detected, the structure is simple, cost is low, and popularization is easy. And application of most scenes, especially multi-channel parallel test scenes, is met.

Description

Technical Field

[0001] This utility model relates to the field of battery testing fixture technology, and in particular to a cell pressure expansion displacement detection fixture. Background Technology

[0002] Currently, new energy vehicles are experiencing rapid development, and power batteries, as the power source for these vehicles, have always been a key research focus in the field. During the charge-discharge cycle of lithium-ion power batteries, electrochemical reactions within the cells cause them to expand, resulting in expansion force and displacement, and a proportional increase in cell volume. This change in thickness has a very negative impact on the lifespan of lithium-ion power batteries. Therefore, measuring the degree of battery expansion has become a key research topic for battery researchers.

[0003] While current battery automatic testing equipment is highly accurate, it is bulky, has low space utilization, and is more expensive. On the other hand, ordinary manual testing equipment operates under poor conditions, and the test results are not accurate enough because they are determined by the subjective skill of the experimenter.

[0004] Chinese patent CN222506363U discloses a simple self-controlled expansion clamp, comprising a testing platform for placing a battery cell under test and a pressure plate disposed above the testing platform for clamping the battery cell. The pressure plate is equipped with a pressure acquisition device. The clamp also includes a drive assembly and a control output assembly mounted on the bottom side of the top plate of the testing platform. A transmission assembly is connected between the output end of the drive assembly and the input end of the control output assembly. The output end of the control output assembly is vertically downward and fixedly connected to the pressure plate to drive the pressure plate closer to or away from the battery cell. A displacement sensor for detecting the displacement of the pressure plate is also disposed on the control output assembly. The transmission assembly is mounted above the top plate and includes a drive wheel, a driven wheel, and a connecting belt. The driven wheel is connected to the output end of the drive component, and the driven wheel is connected to the input end of the control output component. The connecting belt connects the drive wheel and the driven wheel. This solves the problem of horizontally arranging the drive component and the output control component and using a transmission component for transmission, which greatly enhances the space utilization, reduces the overall space occupied, and allows the output control component to improve the accuracy of the control output while detecting and collecting data through pressure acquisition device and displacement sensor. This ensures that the accuracy of the data obtained after detection is guaranteed. The components of this application have a compact structure, extremely high space utilization, and can accurately collect and detect the required data. The structure is simple, the cost is low, and it meets the application needs of most scenarios, especially multi-channel parallel testing scenarios. Summary of the Invention

[0005] The purpose of this utility model is to provide a novel battery cell pressure expansion displacement detection fixture to solve the above-mentioned technical problems. It has a simple structure, good stability, and simple operation. By using pressure expansion detection sensors and displacement sensors to detect and collect data, it enhances the accuracy of control output, ensuring that the accuracy of the data obtained after detection is guaranteed. It has extremely high space utilization and can accurately collect and detect the required data. It has a simple structure, low cost, and meets the application needs of most scenarios, especially multi-channel parallel testing scenarios.

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

[0007] A battery cell pressure expansion displacement detection fixture includes an upper pressure plate, a guide post, a displacement detection component, a middle plate, a top plate, springs, a linear bearing, a test fixture component, a pressure expansion detection component, a lower base plate, and a lower pressure plate. One end of the guide post passes through the middle plate, the upper pressure plate, and the lower pressure plate and is connected to the lower base plate. The other end of the guide post is connected to the top plate. The middle plate is provided with a displacement detection component, which is connected to an external driving component. A battery cell is disposed between the upper pressure plate and the lower pressure plate. Test fixture components are disposed on the left and right sides of the battery cell. A pressure expansion detection component is disposed between the lower base plate and the lower pressure plate. A plurality of springs are disposed between the upper pressure plate and the middle plate. The middle plate is fixed to the guide post by a linear bearing.

[0008] As a further step, the displacement detection component includes a displacement detection bracket, a displacement sensor rod, a displacement sensor, a displacement base, a control displacement display housing, a displacement display screen, and a displacement drive rod. The displacement detection bracket is mounted on the middle plate, and a sensor through hole is provided in the middle of the displacement detection bracket. One end of the displacement sensor rod passes through the sensor through hole in the middle of the displacement detection bracket and is connected to one end of the displacement drive rod. The other end of the displacement drive rod is connected to the drive motor of the external drive component, and the other end of the displacement sensor rod passes through the bottom of the displacement base and is connected to the displacement sensor. A displacement display screen is provided on the control displacement display housing, and the displacement display screen is electrically connected to the displacement sensor through a wire. When the drive motor of the external drive component drives the displacement drive rod, the displacement drive rod drives the middle plate to press downward, and the middle plate presses downward on the upper pressure plate. The upper pressure plate moves closer to or away from the battery cell, thereby clamping the battery cell. The displacement amount is obtained by the displacement sensor and displayed on the displacement display screen.

[0009] As a further step, the pressure expansion detection component includes a pressure expansion detection top plate, a pressure expansion detection sensor, a pressure expansion detection battery box, a pressure expansion detection display housing, and a pressure expansion detection display screen. The pressure expansion detection sensor is located on the lower base plate, and the pressure expansion detection top plate is mounted on the sensor. The pressure expansion detection top plate is installed at the bottom of the lower pressure plate. The pressure expansion detection battery box is located at the bottom of the pressure expansion detection display housing, and a battery is located inside the battery box. The pressure expansion detection display screen is mounted on the housing and is electrically connected to the pressure expansion detection sensor via wires. When the battery cell expands, the pressure expansion detection sensor receives the expansion force of the battery cell after it is clamped and fixed. During the process of the battery cell expanding and pushing the lower pressure plate to move, the displacement data of the expansion is monitored in real time, and the displacement data is displayed on the pressure expansion detection display screen.

[0010] As a further step, the displacement display screen is a touch display screen.

[0011] As a further step, the pressure expansion detection display screen is a touch display screen.

[0012] Furthermore, the spring is a return spring.

[0013] The beneficial effects of this utility model are as follows: by using pressure expansion detection sensor and displacement sensor to detect and collect data, the accuracy of control output is enhanced, ensuring that the accuracy of the data obtained after detection is guaranteed. It has extremely high space utilization, can accurately collect and detect the required data, has a simple structure, low cost, and meets the needs of most application scenarios, especially multi-channel parallel testing scenarios. It has a simple structure, good stability, and is easy to operate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the battery cell pressure expansion displacement detection fixture of this utility model;

[0015] Figure 2 This is a schematic diagram of the exploded structure of the battery cell pressure expansion displacement detection fixture of this utility model;

[0016] Figure 3 This is a schematic diagram of the displacement detection component of this utility model;

[0017] Figure 4 This is an exploded structural diagram of the displacement detection component of this utility model;

[0018] Figure 5 This is a schematic diagram of the pressure expansion detection component of this utility model;

[0019] Figure 6This is a schematic diagram of the exploded structure of the pressure expansion detection component of this utility model;

[0020] Reference numerals: 1. Upper pressure plate; 2. Guide post; 3. Displacement detection component; 31. Displacement detection bracket; 32. Displacement sensor rod; 33. Displacement sensor; 34. Displacement base; 35. Control displacement display housing; 36. Displacement display screen; 37. Displacement drive rod; 4. Middle plate; 5. Top plate; 6. Spring; 7. Linear bearing; 8. Test fixture component; 9. Pressure expansion detection component; 91. Pressure expansion detection top plate; 92. Pressure expansion detection sensor; 93. Pressure expansion detection battery box; 94. Pressure expansion detection display housing; 95. Pressure expansion detection display screen; 96. Wire; 10. Lower base plate; 11. Lower pressure plate; 12. Battery cell. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] For reference Figures 1-6As shown, a battery cell pressure expansion displacement detection fixture includes an upper pressure plate 1, a guide post 2, a displacement detection component 3, a middle plate 4, a top plate 5, a spring 6, a linear bearing 7, a test fixture component 8, a pressure expansion detection component 9, a lower base plate 10, and a lower pressure plate 11. One end of the guide post 2 passes through the middle plate 4, the upper pressure plate 1, and the lower pressure plate 11 and is connected to the lower base plate 10. The other end of the guide post 2 is connected to the top plate 5. The middle plate 4 is provided with a displacement detection component 3, which is connected to an external driving component. A battery cell 12 is provided between the upper pressure plate 1 and the lower pressure plate 11. Test fixture components 8 are provided on the left and right sides of the battery cell 12. A pressure expansion detection component 9 is provided between the lower base plate 10 and the lower pressure plate 11. Several springs 6 are provided between the upper pressure plate 1 and the middle plate 4. The middle plate 4 is fixed to the guide post 2 by a linear bearing 7.

[0025] Preferably, the displacement detection component 3 includes a displacement detection bracket 31, a displacement sensor rod 32, a displacement sensor 33, a displacement base 34, a control displacement display housing 35, a displacement display screen 36, and a displacement drive rod 37. The displacement detection bracket 31 is mounted on the middle plate 4. A sensor through-hole is provided in the middle of the displacement detection bracket 31. One end of the displacement sensor rod 32 passes through the sensor through-hole in the middle of the displacement detection bracket 31 and connects to one end of the displacement drive rod 37. The other end of the displacement drive rod 37 is connected to the drive motor of an external drive component. The displacement sensor... The other end of the rod 32 passes through the bottom of the displacement base 34 and is connected to the displacement sensor 33. The control displacement display housing 35 is provided with a displacement display screen 36. The displacement display screen 36 is electrically connected to the displacement sensor 33 through a wire 96. When the drive motor of the external drive component drives the displacement drive rod 32, the displacement drive rod 32 drives the middle plate 4 to press down. The middle plate 4 presses down on the upper pressure plate 1. The upper pressure plate 1 moves closer to or away from the battery cell 12, thereby clamping the battery cell 12. The displacement amount is obtained through the displacement sensor 33 and displayed on the displacement display screen 36.

[0026] Preferably, the pressure expansion detection component 9 includes a pressure expansion detection top plate 91, a pressure expansion detection sensor 92, a pressure expansion detection battery box 93, a pressure expansion detection display housing 94, and a pressure expansion detection display screen 95. The pressure expansion detection sensor 92 is located on the lower base plate 10, and the pressure expansion detection top plate 91 is mounted on the pressure expansion detection sensor 92. The pressure expansion detection top plate 91 is installed at the bottom of the lower pressure plate 10. The pressure expansion detection battery box 93 is located at the bottom of the pressure expansion detection display housing 94, and a battery is installed inside the pressure expansion detection battery box 93. The pressure expansion detection display screen 95 is mounted on the pressure expansion detection display housing 94. The pressure expansion detection display screen 95 is electrically connected to the pressure expansion detection sensor 92 through a wire 96. When the battery cell expands, the pressure expansion detection sensor 92 receives the expansion force of the battery cell 12 after it is clamped and fixed. During the process of the battery cell 12 expanding and pushing the lower pressure plate 10 to move, the displacement data of the expansion is monitored in real time, and the displacement data is displayed on the pressure expansion detection display screen 95.

[0027] Preferably, the displacement display screen 36 is a touch display screen.

[0028] Preferably, the pressure expansion detection display screen 95 is a touch display screen.

[0029] Preferably, the spring 6 is a return spring.

[0030] Based on the disclosure and teachings of the above specification, those skilled in the art can make appropriate changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims 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 fixture for detecting cell pressure expansion displacement, characterized in that: The device includes an upper pressure plate, a guide post, a displacement detection component, a middle plate, a top plate, springs, a linear bearing, a test fixture component, a pressure expansion detection component, a lower base plate, and a lower pressure plate. One end of the guide post passes through the middle plate, the upper pressure plate, and the lower pressure plate and connects to the lower base plate. The other end of the guide post is connected to the top plate. The middle plate is equipped with a displacement detection component, which is connected to an external drive component. A battery cell is located between the upper pressure plate and the lower pressure plate. Test fixture components are located on both sides of the battery cell. A pressure expansion detection component is located between the lower base plate and the lower pressure plate. Several springs are located between the upper pressure plate and the middle plate. The middle plate is fixed to the guide post by a linear bearing.

2. The cell pressure expansion displacement detection fixture according to claim 1, characterized in that: The displacement detection component includes a displacement detection bracket, a displacement sensor rod, a displacement sensor, a displacement base, a control displacement display housing, a displacement display screen, and a displacement drive rod. The displacement detection bracket is mounted on the middle plate. A sensor through-hole is provided in the middle of the displacement detection bracket. One end of the displacement sensor rod passes through the sensor through-hole in the middle of the displacement detection bracket and connects to one end of the displacement drive rod. The other end of the displacement drive rod is connected to the drive motor of the external drive component. The other end of the displacement sensor rod passes through the bottom of the displacement base and connects to the displacement sensor. A displacement display screen is provided on the control displacement display housing. The displacement display screen is electrically connected to the displacement sensor via a wire. When the drive motor of the external drive component drives the displacement drive rod, the displacement drive rod causes the middle plate to press downwards. The middle plate presses downwards against the upper pressure plate, causing the upper pressure plate to move closer to or further away from the battery cell, thereby clamping the battery cell. The displacement amount is obtained by the displacement sensor and displayed on the displacement display screen.

3. The cell pressure expansion displacement detection fixture according to claim 1, characterized in that: The pressure expansion detection component includes a pressure expansion detection top plate, a pressure expansion detection sensor, a pressure expansion detection battery box, a pressure expansion detection display housing, and a pressure expansion detection display screen. The pressure expansion detection sensor is located on the lower base plate, and the pressure expansion detection top plate is mounted on the sensor. The pressure expansion detection top plate is installed at the bottom of the lower pressure plate. The pressure expansion detection battery box is located at the bottom of the pressure expansion detection display housing, and a battery is installed inside the battery box. The pressure expansion detection display screen is mounted on the housing and is electrically connected to the pressure expansion detection sensor via wires. When the battery cell expands, the pressure expansion detection sensor receives the expansion force of the battery cell after it is clamped and fixed. During the process of the battery cell expanding and pushing the lower pressure plate to move, the displacement data of the expansion is monitored in real time and displayed on the pressure expansion detection display screen.

4. The cell pressure expansion displacement detection fixture according to claim 2, characterized in that: The displacement display screen is a touch display screen.

5. The cell pressure expansion displacement detection fixture according to claim 3, characterized in that: The pressure expansion detection display screen is a touch screen.

6. The cell pressure expansion displacement detection tool of claim 1, wherein: The spring is a return spring.

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