Formation shaping assembly
By designing a forming and shaping component, and using a servo motor-driven shaping clamp to cold-press and shape the battery, the problem of residual gas affecting the SEI film during the lithium-ion battery formation process is solved, thereby improving battery performance and production efficiency.
Patent Information
- Application Number
- CN202520283123.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-20
AI Technical Summary
In the existing lithium-ion battery formation process, residual gas affects the formation of the SEI film, resulting in low initial charge-discharge efficiency and poor cycle performance. At the same time, the formation and capacity testing are carried out separately, resulting in low production efficiency.
Design a forming and shaping component, including an upper and lower movable forming frame and a servo motor driven forming clamp, for shaping batteries after cold pressing. The battery is pressed and released by a robotic arm, thereby improving production efficiency.
It improves battery formation quality, ensures SEI film stability, enhances battery first charge/discharge efficiency and cycle performance, and also increases production efficiency.
Smart Images
Figure CN223828454U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium-ion battery manufacturing technology, specifically to a formation and shaping component. Background Technology
[0002] The formation process of lithium-ion secondary batteries is a crucial step in the manufacturing of lithium-ion batteries. Formation affects the overall performance of the battery, including initial charge-discharge efficiency, cycle life, high-temperature performance, and so on.
[0003] Currently, commercially available lithium-ion batteries generally use graphite or amorphous carbon, which can reversibly insert and extract lithium ions, as the negative electrode material. During the lithium-ion battery formation process, the organic electrolyte undergoes reduction and decomposition on the carbon negative electrode surface, forming an electronically insulating, lithium-ion-conducting solid electrolyte interphase (SEI) film. This results in a large irreversible capacity during the first charge and discharge cycle. During SEI film formation, some gases are generated, such as hydrogen fluoride, carbon dioxide, carbon monoxide, nitric oxide, ethylene, methane, and ethane. These gases remain between the layers of the film, blocking ionic conductivity between the anode and cathode. Gases remaining in the pores of the particles hinder electrolyte wetting, increasing electrochemical polarization, leading to low efficiency, increased irreversible capacity, an unstable SEI film, and poor cycle performance during the first charge and discharge cycle.
[0004] In the current lithium-ion secondary battery manufacturing field, formation and capacity testing involve placing each battery individually on an aging plate and then manually clamping the battery tabs. Moreover, formation and capacity testing are often performed separately. After formation, the battery is shaped, degassed, and then the capacity is measured. This requires two steps of placing and removing the battery on the aging plate and two steps of clamping the battery, which causes great inconvenience to production and results in low production efficiency.
[0005] To overcome the above problems, existing automated forming machines perform formation and capacity testing. During formation, the battery is clamped and pressure is applied to force accumulated gas into a gas bag, preventing it from affecting SEI film formation. Simultaneously, formation and capacity testing are performed, improving both battery performance and production efficiency. However, current automated forming machines generally only include hot-pressing and cold-pressing fixtures. Hot pressing is followed by cold pressing, and the battery is unloaded immediately after cold pressing. The resistors may deform under the combined effects of hot and cold pressing. Therefore, it is necessary to add a component after the cold-pressing fixture in the automated forming machine to reshape the battery. Utility Model Content
[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a forming and shaping component that can shape the battery after cold pressing, thereby ensuring the quality of the battery.
[0007] The technical solution of this utility model is as follows:
[0008] A chemical shaping component includes a first movable shaping frame and a second movable shaping frame arranged parallel to each other vertically. The first movable shaping frame is provided with several rows of first connecting rods at intervals, and several first shaping clips are protruding from the left and right sides on the first connecting rods. The second movable shaping frame is provided with several rows of second connecting rods at intervals corresponding to the intervals of the first connecting rods of the first movable shaping frame, and several second shaping clips corresponding to the first shaping clips are protruding from the left and right sides on the second connecting rods.
[0009] Furthermore, the first movable shaping frame and the second movable shaping frame are driven by servo motors to move in opposite directions or in reverse. The first movable shaping frame has first side ears on both sides that are connected to the motor shaft of the servo motor, and the second movable shaping frame has second side ears on both sides that are connected to the motor shaft of the servo motor.
[0010] Furthermore, the front side of the first movable shaping frame is provided with a first limiting block protruding downward, and the rear side of the second movable shaping frame is provided with a second limiting block protruding upward.
[0011] Furthermore, the top ends of the first shaping clamp and the corresponding second shaping clamp are provided with opposing guide slopes.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The formation and shaping component provided by this utility model can shape the battery after cold pressing to ensure the formation quality of the battery. During the shaping process, a robotic arm picks up the cold-pressed battery and places it between the first shaping clamp and the second shaping clamp for battery shaping. Servo motors drive the first movable shaping frame and the second movable shaping frame to move back and forth, thereby driving several first shaping clamps and second shaping clamps to move in opposite directions. Moving in opposite directions can press and shape the battery, and moving in opposite directions can loosen the battery. This formation and shaping component can shape several rows of batteries at the same time, with high shaping efficiency. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a schematic diagram of the structure of a forming and shaping component provided by this utility model. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0016] To illustrate the technical solution described in this utility model, specific embodiments are described below.
[0017] Example
[0018] Please see Figure 1 This embodiment provides a shaping component, including a first movable shaping frame 1 and a second movable shaping frame 2 arranged in parallel vertically. The first movable shaping frame 1 is provided with several rows of first connecting rods 11 at intervals. Several first shaping clips 12 are protruding from the first connecting rods 11 on the left and right. The second movable shaping frame 2 is provided with several rows of second connecting rods 21 at intervals corresponding to the first connecting rods 11 of the first movable shaping frame 1. Several second shaping clips 22 corresponding to the first shaping clips 12 are protruding from the second connecting rods 21 on the left and right.
[0019] The first movable shaping frame 1 and the second movable shaping frame 2 are driven by servo motors to move in opposite directions or in reverse. The first movable shaping frame 1 has first side ears 13 on both sides that are connected to the motor shaft of the servo motor, and the second movable shaping frame 2 has second side ears 23 on both sides that are connected to the motor shaft of the servo motor.
[0020] The front side of the first movable shaping frame 1 is provided with a first limiting block 14 protruding downward, and the rear side of the second movable shaping frame 2 is provided with a second limiting block 24 protruding upward.
[0021] This formation and shaping assembly can shape batteries after cold pressing to ensure the formation quality of the batteries. During shaping, a robotic arm picks up the cold-pressed batteries and places them between the first shaping clamp 12 and the second shaping clamp 22 for shaping. Servo motors drive the first movable shaping frame 1 and the second movable shaping frame 2 to move back and forth, thereby causing several first shaping clamps 12 and second shaping clamps 22 to move in opposite directions. Moving in opposite directions can press and shape the batteries, while moving in opposite directions can loosen the batteries. This formation and shaping assembly can shape several rows of batteries at the same time, with high shaping efficiency.
[0022] Preferably, the top ends of the first shaping clip 12 and the corresponding second shaping clip 22 are provided with opposing guide slopes. The design of the guide slopes can provide a guiding effect for the battery so that the battery can be smoothly placed between the first shaping clip 12 and the second shaping clip 22.
[0023] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A shaping component, characterized in that: The device includes a first movable shaping frame and a second movable shaping frame arranged in parallel vertically. The first movable shaping frame has several rows of first connecting rods spaced apart, and several first shaping clips protrude from the first connecting rods to the left and right. The second movable shaping frame has several rows of second connecting rods spaced apart corresponding to the first connecting rods of the first movable shaping frame, and several second shaping clips protrude from the second connecting rods to the left and right, corresponding to the first shaping clips.
2. The forming and shaping component according to claim 1, characterized in that: The first movable shaping frame and the second movable shaping frame are driven by servo motors to move in opposite directions or in reverse. The first movable shaping frame has first side ears on both sides that are connected to the motor shaft of the servo motor, and the second movable shaping frame has second side ears on both sides that are connected to the motor shaft of the servo motor.
3. The forming and shaping component according to claim 1, characterized in that: The first movable shaping frame has a first limiting block protruding downward on its front side, and the second movable shaping frame has a second limiting block protruding upward on its rear side.
4. The forming and shaping component according to claim 1, characterized in that: The top ends of the first shaping clamp and the corresponding second shaping clamp are provided with opposing guide slopes.