Universal rechargeable battery composed of lithium ion battery cell, and assembling method thereof

Abstract

The invention belongs to the technical field of secondary cell, and especially relates to a universal rechargeable battery composed of a lithium ion battery cell, and an assembling method thereof. The universal rechargeable battery comprises a battery shell, the lithium ion battery cell, a circuit board module, a cathode end cap, and an insulating sealing ring; the lithium ion battery cell, the circuit board module, the cathode end cap, and the insulating sealing ring are assembled in the battery shell via laminating successively; the universal rechargeable battery also comprises a flexible circuit board; a cathode tab and an anode tab of the lithium ion battery cell are connected with the flexible circuit board respectively; the flexible circuit board is connected with the circuit board module via electrical connection via inserting. Compared with the prior art, the universal rechargeable battery possesses following advantages: the lithium ion battery cell is provided with the flexible circuit board which is connected with the cathode tab and the anode tab of the lithium ion battery cell via electrical connection, and rapid connection of the flexible circuit board with the circuit board module is realized via inserting, operation is simple, connection is stable and reliable, automatic production can be realized, production efficiency is increased, cost is reduced, product consistency is ensured to be excellent, and reliability is high.

Description

technical field [0001] The invention belongs to the technical field of secondary batteries, and in particular relates to a general-purpose rechargeable battery composed of lithium-ion batteries and an assembly method thereof. Background technique [0002] Lithium-ion battery has the advantages of large specific energy, fast charge and discharge, long cycle life, small self-discharge, no pollution, no memory effect, etc. It is an ideal secondary battery to replace general-purpose primary batteries and nickel-metal hydride rechargeable batteries. However, the output voltage of the existing lithium-ion batteries is relatively high, and the output voltage varies with the positive electrode system used. The commercialized lithium-ion batteries currently have a nominal voltage of 3.2V to 3.8V, and with lithium With the development of ion battery technology, the nominal voltage of lithium-ion batteries will increase. Obviously, lithium-ion batteries cannot be directly used to repla...

AI Technical Summary

Problems solved by technology

[0006] 1) The positive and negative end caps are respectively arranged at both ends of the battery case, and the positive ear of the battery cell is connected to the positive end cap, and the negative ear of the battery cell is connected to the negative end cap. Such a structural setting, on the one hand , the manufacturing and assembly process is complex, which increases the difficulty of battery assembly, greatly reduces the assembly efficiency of battery cells, and is not conducive to automated mass production assembly; energy density;

[0007] 2) When it is assembled into a finished battery, the tabs of the battery cell are connected to the charge and discharge protection plate by nickel sheet soldering, ultrasonic spot welding or laser welding. Influenced by the operation level of personnel, there are problems such as low welding efficiency, poor safety, low reliability, and difficulty in ensuring quality consistency; and the use of nickel sheet welding, there is also a problem of high resistivity, which may cause short circuits during processing and damage the battery.

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