Adhesive tape connecting structure for battery structure assembly

Abstract

The utility model discloses an adhesive tape connecting structure for battery structural components, which comprises a structural adhesive and two battery metal components required to be connected together, and further comprises an adhesive tape adhered on the connecting surfaces of the metal components, and the adhesive tapes on the two battery metal components are adhered and connected through the structural adhesive. The adhesive tape connecting structure for the battery structure component is reasonable in design, the specific adhesive tape is firstly adhered to the surface of the metal component, and then the expansion type structural adhesive is connected with the adhesive tape, so that the structural adhesive is prevented from directly connecting the two metal components, a large amount of structural adhesive is prevented from remaining on the components during disassembly, and the components are not easy to damage during disassembly.

Description

Technical Field

[0001] The utility model relates to the technical field of battery adhesive tapes, in particular to an adhesive tape connection structure for a battery structural component. Background Art

[0002] Currently, the internal stability of battery cells is primarily achieved through the use of expandable structural adhesives, which fill the cell volume, solidify, and transform the structure, directly connecting two metal components. This method achieves high shear and tensile strength, as well as strong impact resistance. This is an excellent method for power tools with long battery life and long replacement cycles. However, for some products in the low-altitude economy, batteries pursue high capacity density, resulting in shorter battery life and replacement cycles. This method of directly connecting two metal components with structural adhesives can present some problems, such as being extremely difficult to remove during battery replacement, and a large amount of structural adhesive remaining on the components during removal, which can also damage the components.

[0003] Using structural adhesive to connect battery components has the following drawbacks: 1. Directly connecting components with structural adhesive results in uneven application and thickness; 2. Once cured, structural adhesive is difficult to remove, leaving a large amount of adhesive residue on the components and potentially damaging them. For example, patent CN113067071A discloses a battery module frame, battery module, and battery pack; structural adhesive is applied to the contact surfaces of the battery assembly's side panels and the U-shaped frame, connecting them together. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a battery structural component tape connection structure to achieve the purpose of avoiding the direct connection of two metal components by structural adhesive.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The battery structural component tape connection structure includes structural adhesive and two battery metal components that need to be connected together, and also includes tape for sticking on the connecting surface of the metal components. The tapes on the two battery metal components are connected by bonding with the structural adhesive.

[0007] Further:

[0008] The structural adhesive is an expansion type structural adhesive.

[0009] The adhesive tape comprises a substrate and an adhesive layer compounded on the substrate, and the substrate is a PI film.

[0010] The connection terminals of the metal components on the adhesive tape are provided with connection holes for the connection terminals to pass through.

[0011] The adhesive layer is a high-viscosity, high-temperature resistant polyacrylate glue coating.

[0012] The thickness of the substrate and the adhesive layer are both 25-40 μm.

[0013] The connecting through-holes are two rectangular holes arranged side by side.

[0014] The distance between adjacent connecting perforations on the adhesive tape along the length direction is 280-320 mm.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The battery structural component tape connection structure is reasonably designed. The specific tape is first affixed to the surface of the metal component, and then connected to the tape with an expandable structural adhesive to avoid the structural adhesive directly connecting the two metal components, thereby avoiding a large amount of structural adhesive remaining on the component during disassembly, and the component is not easily damaged during disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a brief description of the contents and symbols in the drawings of this specification:

[0018] Figure 1 This is a schematic diagram of the metal component of the utility model.

[0019] Figure 2 This is a front view of the adhesive tape of the present invention.

[0020] In the picture:

[0021] 1. Metal component, 2. Connection terminal, 3. Tape body, 301. Connection through-hole. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention will be further explained in detail below through the description of embodiments with reference to the accompanying drawings.

[0023] like Figure 1 and Figure 2 As shown, the battery structural component tape connection structure includes tape, structural adhesive and two battery metal components 1 that need to be connected together; the tape is attached to the connecting surface of the metal component, and the tapes on the two battery metal components are connected by bonding with the structural adhesive.

[0024] In the present invention, the structural adhesive is an expandable structural adhesive; the adhesive tape is first affixed to the surface of the metal component, and then the expandable structural adhesive and the adhesive tape are connected, so as to avoid the structural adhesive directly connecting the two metal components, thereby avoiding a large amount of structural adhesive remaining on the component during disassembly, and the component is not easily damaged during disassembly.

[0025] The tape body 3 comprises a substrate and an adhesive layer laminated onto the substrate. The substrate is a PI film, and the adhesive layer is a coating of highly viscous, heat-resistant polyacrylate glue. The PI film has strong polarity, providing a strong bond between the film surface and the structural adhesive. The PI film's high temperature resistance also enhances safety when used in battery assemblies. The highly viscous, heat-resistant polyacrylate glue maintains high adhesion and cohesion even at elevated temperatures, ensuring a stable connection.

[0026] The tape has connecting holes 301 for the connecting terminals 2 of the metal component. These holes are two rectangular holes arranged side by side. Furthermore, the distance between adjacent connecting holes along the length of the tape is 280-320 mm. The thickness of the base material and adhesive layer are both 25-40 μm, providing sufficient adhesion.

[0027] The specific implementation process is:

[0028] The adhesive layer and the PI original film are stacked in sequence.

[0029] The PI substrate layer is preferably a polyimide with excellent heat resistance, high strength, a smooth surface, and uniform thickness. Considering voltage resistance, puncture resistance, and tensile strength, a 25μm thick PI film is preferred. The adhesive layer uses a highly viscous, high-temperature-resistant polyacrylate glue, which maintains high adhesion and cohesion even at higher temperatures, ensuring a stable connection.

[0030] Glue preparation and coating process: First, mix the glue and toluene solvent, stir well, and set aside. Next, corona treat the PI substrate to enhance adhesion to the glue. Apply the glue to the corona-treated surface of the PI film using a doctor blade. Coating temperatures are set at 90 / 125 / 140 / 90°C, and the coating speed is set at 1.0 m / min to ensure the adhesive surface is completely dry. Finally, apply the release film to the release surface and rewind.

[0031] Die cutting: Die-cut the prepared tape roll to leave two rectangular holes on each side. The rectangular holes are 70mm-75mm long, 10-20mm wide, and 30-40mm apart. Punch a pair of such holes every 280-320mm. The rest of the tape is used to bond the components, and the reserved rectangular holes are used to expose the connectors and fix them to other connectors.

[0032] A specific tape is first affixed to the surface of the metal component, and then the expandable structural adhesive is used to connect the tape, preventing the structural adhesive from directly connecting the two metal components. This prevents a large amount of structural adhesive from remaining on the component during disassembly, making the metal component easy to disassemble.

[0033] The above is only an illustration of a preferred embodiment of the present invention. The above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0034] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A battery structural component tape connection structure, comprising a structural adhesive and two battery metal components to be connected together, characterized in that: It also includes a tape for sticking on the connecting surface of the metal components, and the tapes on the two battery metal components are connected by structural adhesive.

2. The battery structure assembly tape connection structure according to claim 1, characterized in that: The structural adhesive is an expansion type structural adhesive.

3. The battery structure assembly tape connection structure according to claim 1, characterized in that: The adhesive tape comprises a substrate and an adhesive layer compounded on the substrate, and the substrate is a PI film.

4. The battery structural assembly tape connection structure according to claim 1, characterized in that: The connection terminals of the metal components on the adhesive tape are provided with connection holes for the connection terminals to pass through.

5. The battery structure assembly tape connection structure according to claim 3, characterized in that: The adhesive layer is a high-viscosity, high-temperature resistant polyacrylate glue coating.

6. The battery structural assembly tape connection structure according to claim 3, characterized in that: The thickness of the substrate and the adhesive layer are both 25-40 μm.

7. The battery structural assembly tape connection structure according to claim 4, characterized in that: The connecting through-holes are two rectangular holes arranged side by side.

8. The battery structural assembly tape connection structure according to claim 4, characterized in that: The distance between adjacent connecting perforations on the adhesive tape along the length direction is 280-320 mm.

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