Simple pressurized formation device for laboratory pouch lithium-ion batteries

Abstract

The utility model discloses a simple and easy device of pressurization formation for laboratory soft package lithium ion battery, including bottom plate, the positioning plate of the high setting of bottom plate top, and the support of a plurality of support columns is set up to the support of bottom plate and positioning plate corresponding side and central, bottom plate is provided with a plurality of battery groove, and the positioning plate is provided with the pressing plate above the battery groove, and the pressure sensor is installed in the battery groove bottom, and the positioning plate is independently provided with the drive arrangement in corresponding single pressing plate. Can realize the electric performance verification of the same batch battery under the formation of different pressure effect, can realize the soft package battery of different batches, different capacity, different material, different formation work step formation simultaneously, and the efficiency is higher, and has certain expansibility, can be expanded into more point by changing fixed plate area and changing flat plate pressure sensor size, realizes higher efficiency. And low cost, suitable for laboratory verification uses.

Description

Technical Field

[0001] This utility model belongs to the technical field of laboratory equipment, and in particular relates to a simple pressure formation device for laboratory soft-pack lithium-ion batteries. Background Technology

[0002] Comprehensive performance testing of lithium-ion battery materials under laboratory conditions requires the fabrication of pouch lithium-ion batteries, a crucial step in the battery fabrication process called formation activation. Currently, the common method is to use a lithium battery hot-pressing formation integrated machine to complete the formation process. This equipment allows for rapid formation of pouch lithium-ion battery cells under heating and pressure. However, commercially available lithium battery hot-pressing formation integrated machines are primarily designed for industrial production, typically with more than 128 formation points per machine. The formation steps can only be consistently configured, not individually for each battery, resulting in limited operation and high cost, representing a significant waste of resources for laboratories. Utility Model Content

[0003] The purpose of this invention is to provide a simple pressure formation device for laboratory soft-pack lithium-ion batteries, enabling small-scale battery testing in the laboratory and reducing costs.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] A simple pressurized formation device for laboratory soft-pack lithium-ion batteries includes a base plate, a positioning plate erected above the base plate, and several support columns provided on the corresponding sides and center of the base plate and the positioning plate for support.

[0006] The base plate is provided with multiple battery slots, and a pressure plate is provided above each of the positioning plates corresponding to the battery slots. A pressure sensor is installed at the bottom of each battery slot.

[0007] Each positioning plate is independently equipped with a driving device for each pressure plate, which is used to drive the pressure plate to move towards the battery slot for compression; the driving device includes a screw and a nut, and the positioning plate has a through hole for the screw to pass through.

[0008] Furthermore, the positioning plate has a limiting ring at the position corresponding to the screw through hole, and the nut has a limiting groove that cooperates with the limiting ring to limit rotation. The pressure plate is also provided with limiting rods on both sides corresponding to the screw, the lower end of the limiting rod is fixed to the pressure plate, and the upper end passes through the positioning plate and is in telescopic cooperation with the part of the positioning plate that passes through it.

[0009] Furthermore, the battery compartment includes a first groove formed in the base plate and a second groove formed in the positioning frame. The positioning frame has through holes for support columns to pass through, and the positioning frame and the base plate are separable. Both the first and second grooves have cable trays for accommodating wiring.

[0010] This invention offers the following advantages: Compared to existing integrated hot-pressing formation machines for lithium batteries, the formation points can be freely increased or decreased according to actual needs, making it highly practical. It enables the verification of the electrical performance of batteries from the same batch after formation under different pressures; it allows for the simultaneous formation of pouch batteries from different batches, with different capacities, materials, and formation steps, resulting in higher efficiency. Furthermore, it has a degree of scalability; by changing the area of ​​the fixed plate and the size of the flat plate pressure sensor, it can be expanded to include more points, achieving even higher efficiency. Finally, it is inexpensive and suitable for laboratory verification. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0012] Figure 1 : Schematic diagram of the structure of this utility model.

[0013] Figure 2 : Schematic diagram of the positioning plate removal structure of this utility model.

[0014] Figure 3 : A schematic diagram of the screw and nut assembly and a partially enlarged structural diagram of this utility model.

[0015] Figure 4 : Schematic diagram of the positioning frame installation structure of this utility model.

[0016] The components represented by each number in the attached diagram are listed below: base plate 1, positioning plate 2, support column 3, battery slot 6, pressure plate 21, pressure sensor 4, lithium-ion battery 5, screw 8, nut 81, limiting ring 82, limiting groove 83, limiting rod 22, pressure plate 21, first groove 11, second groove 71, and wire groove 12. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] like Figures 1-2 The diagram shows a simplified pressurized formation device for laboratory soft-pack lithium-ion batteries. It includes a base plate 1, a positioning plate 2 elevated above the base plate 1, and several support columns 3 on the corresponding sides and center of the base plate 1 and positioning plate 2 for support. Both the base plate and positioning plate are square plate structures, arranged vertically with overlapping projections, and supported and elevated by the support columns. There are nine support columns: three on each side and one in the center, providing high stability.

[0019] The base plate 1 has multiple battery slots 6, and the positioning plate 2 has a pressure plate 21 above each battery slot 6. A pressure sensor 4 is installed at the bottom of each battery slot 6. The battery slots are used to hold soft-pack lithium-ion batteries 5, and their shape is similar to that of the lithium batteries, both being square slots. The pressure sensors are flat pressure sensors, with a shape similar to that of the battery slots, and cover the bottom.

[0020] Each positioning plate 2 is independently equipped with a driving device for each pressure plate, which is used to drive the pressure plate 21 to move towards the battery slot 6 for pressing; the driving device includes a screw 8 and a nut 81, and the positioning plate 2 has a through hole for the screw 8 to pass through.

[0021] During the formation process, the pouch cell is placed in the battery compartment between the flat pressure sensor and the pressure plate. Then, pressure is applied to the pouch cell by tightening the screw and nut, thereby achieving the purpose of pressurized formation.

[0022] This product design features four flat-panel pressure sensors that can apply different pressures. This allows for the experimental verification of the impact of formation under different pressures on battery performance, even when only small batches of pouch batteries can be manufactured in the laboratory.

[0023] Compared to existing integrated lithium battery hot-pressing formation machines, this system allows for the addition or removal of formation points based on actual needs, making it highly practical. It enables the verification of the electrical performance of batteries from the same batch after formation under different pressures; it allows for the simultaneous formation of pouch batteries from different batches, with different capacities, materials, and formation steps, resulting in higher efficiency. Furthermore, it offers scalability, allowing for the expansion to more points and even higher efficiency by changing the area of ​​the fixed plate and the size of the flat plate pressure sensor. It is also cost-effective, making it suitable for laboratory verification.

[0024] By placing the pressurized formation device in constant temperature chambers at different temperatures and connecting the battery to a battery tester using a clamp, formation verification experiments can be carried out at different temperatures, pressures, and formation steps.

[0025] like Figure 3 As shown: The positioning plate 2 has a limiting ring 82 at the position corresponding to the through hole of the screw 8, and the nut 81 has a limiting groove 83 that cooperates with the limiting ring 82 to limit rotation. The limiting ring is annular and fits on the upper side of the corresponding through hole. When the nut rotates, the position of the limiting nut remains constant, thereby driving the screw to move along its length. The downward pressure of the pressure plate can be precisely controlled by rotating the nut. The pressure plate 21 is also provided with limiting rods 22 on both sides corresponding to the screw 8. The lower end of the limiting rod 22 is fixed to the pressure plate 21, and the upper end passes through the positioning plate 2 and is in telescopic cooperation with the part through which the positioning plate 2 passes. When the nut is rotated to drive the screw, the limiting rods prevent the pressure plate from rotating synchronously, thus ensuring precise downward pressure.

[0026] like Figure 2 , Figure 4 As shown: The battery compartment 6 includes a first groove 11 formed in the base plate 1 and a second groove 71 formed in the positioning frame 7. The positioning frame 7 has a through hole for the support column 3 to pass through. The positioning frame 7 and the base plate 1 are separable. The battery compartment is composed of the first groove and the second groove. The first groove is mainly used for limiting the installation of the pressure sensor, and the second groove is used for limiting the installation of the battery pack. After the battery detection is completed, the positioning frame is raised to separate the battery compartment, so that the battery is fully exposed, making it easy to remove the battery pack. Both the first groove 11 and the second groove 71 have wire grooves 12 for accommodating wiring. These are used for wiring of the pressure sensor and wiring of the battery pack, respectively.

[0027] These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of this utility model, so that those skilled in the art can better understand and utilize this utility model.

Claims

1. A simple apparatus for pressurized formation of laboratory soft-pack lithium-ion batteries, characterized in that: It includes a base plate (1), a positioning plate (2) erected above the base plate (1), and several support columns (3) provided on the corresponding sides and center of the base plate (1) and the positioning plate (2) for support; The base plate (1) is provided with multiple battery slots (6), and the positioning plate (2) is provided with pressure plates (21) above each battery slot (6), and pressure sensors (4) are installed at the bottom of each battery slot (6). Each positioning plate (2) is independently equipped with a driving device for driving the pressure plate (21) to move towards the battery slot (6) for pressing; the driving device includes a screw (8) and a nut (81), and the positioning plate (2) has a through hole for the screw (8) to pass through.

2. The simple pressurized formation device for laboratory pouch lithium-ion batteries according to claim 1, characterized in that: The positioning plate (2) has a limiting ring (82) at the position corresponding to the through hole of the screw (8), and the nut (81) has a limiting groove (83) that cooperates with the limiting ring (82) to limit rotation.

3. The simple pressurized formation device for laboratory pouch lithium-ion batteries according to claim 2, characterized in that: The pressure plate (21) is provided with limit rods (22) on both sides of the screw (8). The lower end of the limit rod (22) is fixed to the pressure plate (21), and the upper end passes through the positioning plate (2) and is in telescopic cooperation with the positioning plate (2) through the part.

4. The simple pressurized formation device for laboratory pouch lithium-ion batteries according to claim 1, characterized in that: The battery compartment (6) includes a first compartment (11) formed on the base plate (1) and a second compartment (71) formed on the positioning frame (7). The positioning frame (7) has a through hole for the support column (3) to pass through. The positioning frame (7) and the base plate (1) are separable.

5. The simple pressurized formation device for laboratory pouch lithium-ion batteries according to claim 4, characterized in that: Both the first groove (11) and the second groove (71) are provided with wire grooves (12) to accommodate the wiring.

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