Digital termination adhesive tape for power lithium battery
By wrapping the digital identification layer in the lithium battery digital termination tape onto the electrolyte-resistant functional layer and adding a protective layer, the problem of the labeling layer being susceptible to electrolyte erosion is solved, and the clarity and recognition of the labeling layer are protected.
Patent Information
- Application Number
- CN202420438171.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-07
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-03-07
AI Technical Summary
The existing lithium battery digital termination tape marking layer is susceptible to electrolyte erosion, resulting in low clarity of the marking layer, affecting identification.
A digital termination tape for power lithium batteries was designed, and the digital identification layer was wrapped in the electrolyte-resistant functional layer, and the electrolyte penetration was prevented by the protective layer to ensure the clarity of the marking layer.
Effectively prevent electrolyte corrosion, protect the digital identification layer from damage, and maintain the clarity and recognition of the indication layer.
Smart Images
Figure CN222665756U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of adhesive tapes, in particular to a digital termination adhesive tape for power lithium batteries. Background Art
[0002] In the mid-stage production process of lithium-ion battery cells (winding / stacking, shell welding and sealing, etc.), pressure-sensitive adhesive is required for electrode winding, pole piece protection and core termination. This adhesive is called lithium-ion battery tape, and its main function is to insulate and fix the lithium-ion battery. Lithium battery termination tape has the characteristics of strong electrolyte resistance, high adhesion, softness, fit, environmental protection and halogen-free. In order to meet the development requirements for product quality controllability and traceability, a lithium battery digital termination tape has been developed on the market. Printed digital labels are added to the lithium battery termination tape, so that each battery and its materials can be effectively traced throughout the process. The existing lithium battery digital termination tape has the problem that the marking layer is easily corroded by the electrolyte, resulting in low clarity of the marking layer, which affects identification. Utility Model Content
[0003] In order to solve the above problems, the utility model provides a digital termination tape for a power lithium battery.
[0004] The technical solution adopted by the utility model is:
[0005] A digital termination tape for a power lithium battery comprises a release agent layer, a protective layer, an electrolyte resistant functional layer, a digital identification layer, a substrate layer and an acrylic pressure-sensitive adhesive layer; the digital identification layer is an ink structure layer formed by printing ink on the front side of the substrate layer, the ink structure layer is located in the middle of the substrate layer and wrapped in the electrolyte resistant functional layer; the release agent layer, the protective layer, the electrolyte resistant functional layer, the substrate layer and the acrylic pressure-sensitive adhesive layer are bonded in sequence.
[0006] Furthermore, the protective layer is made of a PET film with a thickness of 10-25 μm.
[0007] Furthermore, the substrate layer is made of a PP film with a thickness of 10-25 μm.
[0008] Furthermore, the electrolyte resistant functional layer is a structural layer composed of an electrolyte resistant acrylic adhesive coated on the back of the Pet film.
[0009] Furthermore, the thickness of the electrolyte resistant functional layer is 20-40 μm.
[0010] Furthermore, the width of the ink structure layer is 1 / 2-1 / 3 of the width of the substrate layer.
[0011] Beneficial effects of the utility model:
[0012] 1. The digital logo layer is wrapped in the anti-electrolyte functional layer, which can effectively prevent the penetration of electrolyte, thereby protecting the digital logo layer from electrolyte erosion.
[0013] 2. The setting of the protective layer can effectively prevent the anti-electrolyte functional layer from being corroded, thereby further protecting the digital identification layer. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the structure of the digital termination tape for the power lithium battery of the present application. DETAILED DESCRIPTION
[0015] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and a preferred implementation manner.
[0016] See also Figure 1 A digital termination tape for a power lithium battery comprises a release agent layer 11, a protective layer 12, an anti-electrolyte functional layer 13, a digital identification layer 14, a substrate layer 15 and an acrylic pressure-sensitive adhesive layer 16; the digital identification layer 14 is an ink structure layer formed by printing ink on the front of the substrate layer 15, and the ink structure layer is located in the middle of the substrate layer and wrapped in the anti-electrolyte functional layer; the release agent layer 11, the protective layer 12, the anti-electrolyte functional layer 13, the substrate layer 15, and the acrylic pressure-sensitive adhesive layer 16 are bonded in sequence.
[0017] Preferably, the protective layer is made of a Pet film with a thickness of 10-25 μm; and the substrate layer is made of a PP film with a thickness of 10-25 μm.
[0018] PET film has strong corrosion resistance, good temperature resistance and strong impact resistance, and can well protect the structure of the anti-electrolyte functional layer from corrosion damage; PP film has good softness and poor temperature resistance. PP film combined with PP film can improve the overall temperature resistance and conformability of the tape.
[0019] The back of the Pet film is subjected to surface corona treatment to obtain a film substrate with a rough back and a smooth front. A release agent is coated on the front of the Pet film, and a release agent layer 11 is formed after drying and curing. The thickness of the release agent layer 11 is 1-2μm; an electrolyte-resistant acrylic adhesive is coated on the back of the Pet film, and an electrolyte-resistant functional layer 13 is formed after drying and curing. The thickness of the electrolyte-resistant functional layer is 20-40μm.
[0020] The Pet release film is obtained through the above treatment.
[0021] Both sides of the PP film are subjected to surface corona treatment to obtain a rough film substrate on both sides, and an acrylic pressure-sensitive adhesive is coated on the back of the PP film, which is dried and cured to form an acrylic pressure-sensitive adhesive layer 16; digital ink is printed at equal intervals on the front of the PP film to obtain a digital identification layer 14, and the distance between two adjacent digital identification layers 14 is 1-2 times of their width.
[0022] The PP digital film is obtained through the above treatment.
[0023] The PET release film and the PP digital film are hot pressed at a high temperature of 120° C. to 150° C. with a pressure of 0.5 MPa, and the digital termination tape for the power lithium battery of the present application is obtained after winding and cutting.
[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications are also within the protection scope of the present invention.
Claims
1. A digital termination tape for a power lithium battery, characterized in that: It includes a release agent layer, a protective layer, an anti-electrolyte functional layer, a digital identification layer, a substrate layer and an acrylic pressure-sensitive adhesive layer; the digital identification layer is an ink structure layer formed by printing ink on the front of the substrate layer, and the ink structure layer is located in the middle of the substrate layer and wrapped in the anti-electrolyte functional layer; the release agent layer, the protective layer, the anti-electrolyte functional layer, the substrate layer and the acrylic pressure-sensitive adhesive layer are bonded in sequence; The protective layer is made of a Pet film with a thickness of 10-25 μm; The substrate layer is made of a PP film with a thickness of 10-25 μm; The electrolyte resistant functional layer is a structural layer composed of an electrolyte resistant acrylic adhesive coated on the back of the Pet film.
2. A digital termination tape for a power lithium battery according to claim 1, characterized in that The thickness of the electrolyte resistant functional layer is 20-40 μm.
3. A digital termination tape for a power lithium battery according to claim 1, characterized in that: The width of the ink structure layer is 1 / 2-1 / 3 of the width of the substrate layer.