Module cell stacking pressure detection tool

Abstract

The utility model provides a module cell stacking pressure detection tool. The module cell stacking pressure detection tool comprises a bottom plate, a pressure sensor and a top plate, the bottom plate is located at the bottommost part, and a pressure sensor is installed on the bottom plate and used for detecting the borne pressure in real time; meanwhile, the bottom plate is also provided with a guide pillar hole in which a steel ball is arranged; the top plate is located above the bottom plate, a guide column is arranged at the bottom of the top plate, and the tail end of the guide column extends downwards and is inserted into a guide column hole with a built-in steel ball; meanwhile, the top plate is further provided with a pole for supplying power to the top plate. According to the utility model, on the basis of the battery cell profiling structure design, the micro expansion or shrinkage behavior of the battery cells in the circulation process is simulated, and the accurate and real-time detection of the fastening force between the battery cells in the module is realized; the data collected by the device is recorded and stored in real time, and can be analyzed together with other battery cell data, so that the fastening force is optimized to an optimal range.

Description

Technical Field

[0001] The utility model relates to the technical field of battery stacking, in particular to a detection tool for the stacking pressure of module electric cores. Background Art

[0002] After the sodium battery or lithium battery is completed in PACK stacking, each electric core, foam / insulating board, and end plate are fastened together by a steel ring or bandage, and there is an extrusion force between the electric cores. The above extrusion force is called the fastening force, and the magnitude of the fastening force is related to the service life of the sodium battery or lithium battery. If the fastening force between the electric cores in the module is too small or too large, the electric cores will be scrapped in advance. Therefore, it is necessary to set the fastening force within a reasonable range, but how to accurately detect the magnitude of the fastening force is the premise and key.

[0003] Therefore, it is urgently necessary to develop a tool that can be used to accurately detect the fastening force between the electric cores in the module. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a detection tool for the stacking pressure of module electric cores, which is designed based on the electric core profiling structure and simulates the micro-expansion or contraction behavior of the electric core during the cycle process to realize the accurate and real-time detection of the fastening force (i.e., stacking pressure) between the electric cores in the module.

[0005] The utility model adopts the following technical solutions to solve the above technical problems:

[0006] A detection tool for the stacking pressure of module electric cores includes a bottom plate, a pressure sensor, and a top plate; the bottom plate is located at the bottom, and the pressure sensor is installed thereon for real-time detection of the pressure received; at the same time, the bottom plate is also provided with a guide post hole with steel balls; the top plate is located above the bottom plate, and a guide post is provided at the bottom of the top plate, and the end of the guide post extends downward and is inserted into the guide post hole with steel balls; at the same time, a pole is also provided on the top plate for supplying power to the top plate.

[0007] As one of the preferred ways of the utility model, the bottom plate is made of the same material as the aluminum shell of the electric core, which is an aluminum alloy plate.

[0008] As one of the preferred ways of the utility model, four guide post holes with steel balls are provided on the bottom plate to facilitate the insertion of the guide posts.

[0009] As one of the preferred ways of the utility model, the four guide post holes with steel balls are respectively arranged at the four peripheral positions of the bottom plate, and the pressure sensor is installed through the installation groove at the center position of the bottom plate.

[0010] As one of the preferred embodiments of the present utility model, a sensor wire groove is further provided on the bottom plate; one end of the sensor wire groove is connected to the installation groove, and the other end extends outside the bottom plate for leading out the signal wire of the pressure sensor, facilitating real-time monitoring, storage and analysis of the data of the pressure sensor.

[0011] As one of the preferred embodiments of the present utility model, the top plate is made of piezoelectric ceramic material and is a piezoelectric ceramic plate.

[0012] As one of the preferred embodiments of the present utility model, four guide posts are provided at the bottom of the top plate, and the parallelism between the bottom plate and the top plate is maintained through the cooperation with the guide post holes, ensuring that the force is always evenly distributed on the pressure sensor during the extrusion process.

[0013] As one of the preferred embodiments of the present utility model, the pole columns include a positive pole column and a negative pole column; the top plate is powered through the cooperation of the positive pole column and the negative pole column to simulate the deformation during the charge and discharge process of the module battery cell, so that the top plate expands or contracts slightly.

[0014] As one of the preferred embodiments of the present utility model, the overall length, width and height of the module battery cell stacking pressure detection tooling are all the same as those of the battery cell to be measured.

[0015] The advantages of the present utility model compared with the prior art are as follows:

[0016] (1) Based on the battery cell profiling structure design, the present utility model simulates the slight expansion or contraction behavior of the battery cell during the cycling process, realizing accurate and real-time detection of the fastening force (i.e., stacking pressure) between the battery cells in the module.

[0017] (2) The data collected by the device of the present utility model is recorded and stored in real time, and can be analyzed together with other battery cell data to optimize the fastening force to the best range. Description of the Drawings

[0018] Figure 1 is the structural schematic diagram of the module battery cell stacking pressure detection tooling in the working state in Embodiment 1;

[0019] Figure 2 is the structural schematic diagram of the module battery cell stacking pressure detection tooling in the state of not being fully pressed and fitted in Embodiment 1;

[0020] Figure 3 is Figure 2 the structural schematic diagram from another angle of

[0021] Figure 4 is the structural schematic diagram of the bottom plate in Embodiment 1.

[0022] In the figure: 1 is the bottom plate, 11 is the installation groove, 12 is the guide post hole, 13 is the high-precision steel ball, 14 is the sensor wire groove, 2 is the pressure sensor, 3 is the top plate, 31 is the guide post, 32 is the pole column, 321 is the positive pole column, and 322 is the negative pole column. Specific implementation mode

[0023] The following is a detailed description of the embodiments of the present invention. These embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments.

[0024] Embodiment 1

[0025] Refer to Figures 1 to 4 , a module battery cell stacking pressure detection tooling of this embodiment includes a bottom plate 1, a pressure sensor 2, and a top plate 3.

[0026] The bottom plate 1 is made of the same material as the battery cell aluminum shell. The pressure sensor 2 is installed at the center position of its upper part through the installation groove 11 for real-time detection of the pressure received. At the same time, four guide post holes 12 with built-in high-precision steel balls 13 are also provided around the upper part of the bottom plate 1.

[0027] The top plate 3 is made of piezoelectric ceramic material and is located above the bottom plate 1. Four guide posts 31 are provided at the bottom of the top plate 3. The ends of the guide posts 31 extend downward and are respectively inserted into a guide post hole 12 with a built-in high-precision steel ball 13. In this embodiment, the parallelism between the bottom plate 1 and the top plate 3 is maintained through the cooperation of the guide posts 31 and the guide post holes 12 to ensure that the force is always evenly distributed on the pressure sensor 2 during the extrusion process. At the same time, a pole column 32 is also provided on the side wall of the top plate 3. The pole column includes a positive pole column 321 and a negative pole column 322 for supplying power to the top plate 3. Through the cooperation of the positive pole column 321 and the negative pole column 322, the top plate 3 accurately simulates the deformation during the charge and discharge process of the battery cell, causing the top plate 3 to expand or contract slightly, thereby realizing the accurate detection of the tightening force between the battery cells.

[0028] Furthermore, in this embodiment, a sensor wire groove 14 is also opened on the bottom plate 1. One end of the sensor wire groove 14 is connected to the installation groove 11, and the other end extends outside the bottom plate 1 for leading out the signal wire of the pressure sensor 2, facilitating real-time monitoring, storage, and analysis of the data of the pressure sensor 2, so as to optimize the tightening force to the best range.

[0029] Furthermore, in this embodiment, the overall length, width, and height of the module battery cell stacking pressure detection tooling are the same as those of the battery cell to be measured, facilitating more accurate simulation.

[0030] Usage method and principle:

[0031] First, the "deformation amount" of the battery cell under test during charge and discharge is detected through experiments, and then data statistics and analysis are carried out. Then, a corresponding voltage is applied to the top plate 3 of the tooling in this embodiment, so that the overall thickness change of the tooling is consistent with the thickness change of the battery cell under test during charge and discharge, and the pressure change situation of the battery cell during the full life cycle in the module can be restored.

[0032] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A module battery stacking pressure detection tool, characterized in that: It includes a bottom plate, a pressure sensor and a top plate; the bottom plate is located at the bottom, on which the pressure sensor is installed for real-time detection of the pressure; at the same time, a guide column hole with a steel ball built in is also provided on the bottom plate; the top plate is located above the bottom plate, a guide column is provided at the bottom of the top plate, the end of the guide column extends downward and is inserted into the guide column hole with a steel ball built in; at the same time, a pole is also provided on the top plate for supplying power to the top plate.

2. The module battery stacking pressure detection tool according to claim 1, characterized in that: The bottom plate is an aluminum alloy plate.

3. The module battery stacking pressure detection tool according to claim 1, characterized in that: The bottom plate is provided with four guide post holes with steel balls built in, which are convenient for inserting the guide posts.

4. The module battery stacking pressure detection tool according to claim 3, characterized in that: The four guide column holes with built-in steel balls are respectively arranged at the four sides of the bottom plate, and the pressure sensor is installed at the center of the bottom plate through a mounting groove.

5. The module battery stacking pressure detection tool according to claim 4, characterized in that: The bottom plate is also provided with a sensor wire groove; one end of the sensor wire groove is connected to the mounting groove, and the other end thereof extends outside the bottom plate for externally leading the signal line of the pressure sensor.

6. The module battery stacking pressure detection tool according to claim 1, characterized in that: The top plate is a piezoelectric ceramic plate.

7. The module battery stacking pressure detection tool according to claim 1, characterized in that: Four guide posts are arranged at the bottom of the top plate to keep the bottom plate and the top plate parallel.

8. The module battery stacking pressure detection tool according to claim 1, characterized in that: The poles include a positive pole and a negative pole; the top plate is powered by the positive pole and the negative pole to simulate the deformation of the battery cell during charging and discharging.

9. The module battery stacking pressure detection tool according to any one of claims 1 to 8, characterized in that: The overall length, width and height of the module battery cell stacking pressure testing tool are consistent with the battery cell being tested.

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