Process method for packaging soft package semi-solid lithium ion battery
By sticking the film inside the aluminum-plastic film of the lithium-ion battery and performing secondary packaging, the problem of unreliable seal caused by the residue of electrolyte gel during the lithium-ion battery packaging process is solved, and more reliable packaging is achieved to prevent bulging and electrolyte leakage. It is suitable for a wide range of lithium-ion battery production lines.
Patent Information
- Application Number
- CN202510077581.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-05-13
AI Technical Summary
In the existing soft-pack semi-solid lithium-ion battery packaging process, the vacuum sealing process will cause the electrolyte gel to remain, resulting in unreliable sealing, and there are risks such as later seal failure, poor water isolation, and battery bulge.
Stick the film inside the aluminum-plastic film and reserve the ribbon, inject the electrolyte and curing agent to heat seal, cut off the air bag and vacuum it with negative pressure, tear the film through the ribbon for secondary packaging, ensuring that the seal is completed under a vacuum environment.
Effectively removes electrolyte gel residues in the packaging area, improves the reliability of packaging, prevents bulging and electrolyte leakage caused by poor packaging of lithium batteries. It is suitable for liquid or semi-solid lithium-ion battery production lines, saving costs.
Smart Images
Figure CN119994229A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of lithium ion battery packaging, and in particular to a process method for packaging a soft-package semi-solid lithium ion battery. Background Art
[0002] In the prior art, in the manufacturing process of soft-pack semi-solid lithium-ion batteries, after the formation process is completed, the opening of the soft-pack battery needs to be evacuated, sealed and sheared to ensure the sealing of the internal winding core of the battery. The process method is as shown in the attached Figure 1 As shown, First, the battery is taken out after the formation process, the air bag part is cut off, and then the vacuum treatment is carried out. Finally, while maintaining the vacuum condition, the incision is re-sealed and the cutting is completed.
[0003] However, in traditional process methods, the in-situ cured semi-solid battery will solidify the electrolyte in the battery to form gel, and vacuuming will transfer part of the gel to the sealing area, resulting in unreliable sealing of the lithium-ion battery, and there are risks of later sealing failure, poor moisture isolation, and battery bulging. Summary of the invention
[0004] The purpose of the present invention is to provide a process method for packaging soft-package semi-solid lithium-ion batteries in order to solve the technical problems of lithium-ion battery sealing failure, poor moisture isolation and battery bulging.
[0005] A process for packaging a soft-pack semi-solid lithium-ion battery comprises the following sub-steps: S1: Before the lithium battery is packaged, a thin film is manually pasted inside the aluminum-plastic film, and a ribbon is reserved; S2: After injecting electrolyte and curing agent, heat sealing is performed in the primary packaging area; S3: Remove the air bag, use -80kPa negative pressure to evacuate, maintain the vacuum environment, use a mechanical device to tear the film through the ribbon for secondary packaging.
[0006] Further, a process for packaging a soft-pack semi-solid lithium-ion battery, wherein the edge of the film is fixed by glue; The film is arranged inside the air bag and the secondary packaging area.
[0007] Furthermore, a process for packaging a soft-pack semi-solid lithium-ion battery, wherein S2 comprises the following sub-steps: S21: After injecting the electrolyte and curing agent, heat sealing is performed in the primary packaging area at a temperature of 200°C for 5 seconds; S22: Allow the electrolyte to soak into the electrode at room temperature for 24 hours; S23: curing the electrolyte in a high temperature environment for 24 hours; S24: Charge with 0.1C current to 3.75V, then charge at constant voltage, and stop formation when the current drops to 0.01C.
[0008] Further, a process for packaging a soft-pack semi-solid lithium-ion battery, wherein the normal temperature environment is 25°C; The high temperature environment is 45°C.
[0009] The beneficial effects of the present invention are as follows: a process method for packaging a soft-package semi-solid lithium-ion battery, which removes electrolyte gel residues in the packaging area to ensure the reliability of the packaging; effectively prevents bulging and electrolyte leakage caused by poor packaging in the later stage of the lithium battery; can be formally used in any liquid or semi-solid lithium-ion battery production line, saves costs, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is a schematic diagram of the traditional process method.
[0011] Figure 2 It is a flow chart of the present invention.
[0012] Figure 3 It is a schematic diagram of the method of the present invention. DETAILED DESCRIPTION
[0013] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.
[0014] In order to solve the problem that the current soft-pack semi-solid lithium-ion battery needs to be packaged again after formation, and the electrolyte gel is easily extracted into the packaging area due to the need for vacuum packaging, resulting in poor packaging and subsequent failure, a layer of film is added to the entire air bag of the aluminum-plastic film including the inside of the secondary packaging area, and the edge of the film is fixed by glue. Under the condition of maintaining vacuum in the secondary packaging, the film is removed and then packaged.
[0015] As attached Figure 2~3 As shown, a process method for packaging a soft-pack semi-solid lithium-ion battery includes the following sub-steps: S1: Before the lithium battery is packaged, a thin film is manually pasted inside the aluminum-plastic film, and a ribbon is reserved; S2: After injecting electrolyte and curing agent, heat sealing is performed in the primary packaging area; S3: Remove the air bag, use -80kPa negative pressure to evacuate, maintain the vacuum environment, use a mechanical device to tear the film through the ribbon for secondary packaging.
[0016] Further, a process for packaging a soft-pack semi-solid lithium-ion battery, wherein the edge of the film is fixed by glue; The film is arranged inside the air bag and the secondary packaging area.
[0017] Furthermore, a process for packaging a soft-pack semi-solid lithium-ion battery, wherein S2 comprises the following sub-steps: S21: After injecting the electrolyte and curing agent, heat sealing is performed in the primary packaging area at a temperature of 200°C for 5 seconds; S22: Allow the electrolyte to soak into the electrode at room temperature for 24 hours; S23: curing the electrolyte in a high temperature environment for 24 hours; S24: Charge with 0.1C current to 3.75V, then charge at constant voltage, and stop formation when the current drops to 0.01C.
[0018] Further, a process for packaging a soft-pack semi-solid lithium-ion battery, wherein the normal temperature environment is 25°C; The high temperature environment is 45°C.
[0019] This solution uses a soft-pack semi-solid lithium-ion battery packaging process to remove electrolyte gel residues in the packaging area to ensure the reliability of the packaging; it effectively prevents bulging and electrolyte leakage caused by poor packaging in the later stage of the lithium battery; it can be formally used in any liquid or semi-solid lithium-ion battery production line, saving costs and having a wide range of applications.
[0020] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A process for packaging a soft-pack semi-solid lithium-ion battery, characterized in that: It includes the following sub-steps: S1: Before the lithium battery is packaged, a thin film is manually pasted inside the aluminum-plastic film, and a ribbon is reserved; S2: After injecting electrolyte and curing agent, heat seal the primary packaging area; S3: Remove the air bag, use -80kPa negative pressure to evacuate, maintain the vacuum environment, use a mechanical device to tear the film through the ribbon for secondary packaging.
2. The process for packaging a soft-package semi-solid lithium-ion battery according to claim 1, characterized in that: The film edge is fixed by glue; The film is arranged inside the air bag and the secondary packaging area.
3. The process for packaging a soft-package semi-solid lithium-ion battery according to claim 1, characterized in that: The S2 comprises the following sub-steps: S21: After injecting the electrolyte and curing agent, heat sealing is performed in the primary packaging area at a temperature of 200°C for 5 seconds; S22: Allow the electrolyte to soak into the electrode at room temperature for 24 hours; S23: curing the electrolyte in a high temperature environment for 24 hours; S24: Charge with 0.1C current to 3.75V, then charge at constant voltage, and stop formation when the current drops to 0.01C.
4. The process for packaging a soft-package semi-solid lithium-ion battery according to claim 3, characterized in that: The normal temperature environment is 25°C; The high temperature environment is 45°C.