Method for mfg. lamination cell and lamination cell made thereby

Abstract

Tips of the lug portions of a board touch the bottom of the opening between projecting portions and step portions, when the upper mold and the lower mold are fit together with a battery and board inserted. Thus the board is retained in position in the molds certainly. After the molds are fit together, polyamide resin is injected into a molding space from a resin-material-injecting orifice provided in the upper mold.

Description

technical field [0001] The present invention relates to a method of manufacturing a laminated battery used as a power source of an electronic device, etc., and a laminated battery manufactured by the method. Background technique [0002] In recent years, for electrical appliances such as mobile phones, laminated batteries in which the battery and the substrate of the protection circuit for preventing overcharging and overdischarging during charging and discharging are encapsulated in a resin outer body and sealed are used. [0003] For such a laminated battery, in the past, the fixing method of the battery and the substrate was adopted by sealing the outer body formed by the upper cover and the lower cover. However, in recent years, for the purpose of reducing the number of parts and improving productivity, The gap between the substrate and the battery is often filled with low-temperature molding resin, and the battery is covered with low-temperature molding resin to form a ...

AI Technical Summary

Problems solved by technology

[0006] However, with this method, the jig into which the clip is inserted hinders the flow of the resin during filling, and poor resin flow is likely to occur.

In a laminated battery with poor resin flow during molding, cracks and pinholes will occur inside and outside the resin mold, and the airtightness between the substrate and the battery, which should be sealed by the resin mold, cannot be ensured; and The problem of insufficient mechanical strength

Problems like this will lead to low effective utilization

[0007] On the other hand, although the filling speed when filling the resin is reduced, or the resin temperature and filling pressure are increased, the occurrence of poor resin flow can be suppressed, but this will cause a decrease in productivity or cause damage to the battery and protection circuits. Damage from heat, pressure, etc.

[0008] In addition, if a low-viscosity material is used as the filling resin material, although the problem of suppressing the occurrence of poor resin flow is considered, in reality, there is no low viscosity when filling, and the mechanical properties of the resin mold in the finished product The material which has strength at the same time

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