On December 14, 2023, the financial sector reported that, according to the announcement of the China National Intellectual Property Administration, Chongqing Zijian Electronics Co., Ltd. obtained an item entitled "Adhesive structure of flexible package lithium ion battery coil, battery coil and lithium ion battery", with the authorization announcement number of CN220172189U and the application date of June 2023.
The patent abstract shows that the present utility model relates to the field of lithium-ion battery technology, and discloses an adhesive structure for a soft pack lithium-ion battery core, a battery core, and a lithium-ion battery. The adhesive structure includes a diaphragm extension section and an adhesive layer. The soft pack lithium-ion battery core has an aluminum foil tail end section and a diaphragm, and the diaphragm extension section is seamlessly connected to the diaphragm. The diaphragm extension section extends beyond the aluminum foil tail end section, The adhesive layer is adhered to the extension section of the diaphragm and the surface of the aluminum foil. This utility model can effectively enhance the adhesion force of the core termination adhesive or hot melt adhesive, avoiding displacement and detachment of the core termination adhesive or hot melt adhesive after the electrolyte of the core bubble.