Combination of battery protection board and battery core as well as combination method thereof

Abstract

The invention discloses a combination of a battery protection board and a battery core as well as a combination method thereof. The combination method comprises the following steps of: providing a battery protection board equipped with conductive bodies, welding a pair of positive connecting blocks and a pair of negative connecting blocks on a surface of the battery protection board in a SMT (Surface Mounting Technology) mode, electrically connecting each positive connecting block and each negative connecting block with the corresponding conductive bodies; covering the battery protection board on an end surface which is provided with a positive plate and a negative plate of the battery core, enabling the positive connecting blocks and the negative connecting blocks to correspond to the positive plate and the negative plate; and propping the positive bar and the negative bar of a DC (Direct Current) spot welding machine in the conductive body position at the other surface of the battery protection board, pressing the battery protection board on the battery core, and welding the battery protection board on the positive plate and the negative plate of the battery core via the positive connecting blocks and the negative connecting blocks so that the battery protection board is electrically connected with the battery core. The combination method of the battery protection board and the battery core enhances the efficiency and improves the welding quality.

Description

Technical field [0001] The present invention relates to the technical field of lithium ion batteries, in particular to a combination of a battery protection plate and an electric core and a combination method thereof. Background technique [0002] In the current electronic information age, the demand for mobile power is growing rapidly. Lithium-ion batteries have the advantages of high voltage, high capacity, long cycle life, good safety performance, small self-discharge, fast charge and discharge, and large operating temperature range. It has been widely used in many aspects such as portable electronic equipment, electric vehicles, space technology, and defense industry. However, due to the high energy density of lithium-ion batteries, they are easily damaged during overcharge, overdischarge, overcurrent, short circuit, ultra-high temperature charge and discharge, and low temperature use. Therefore, a set of strict protection measures must be adopted to reduce the use of Danger...

AI Technical Summary

Problems solved by technology

But, because the nickel connecting piece 3' and the nickel piece 4' that implement spot welding are both nickel metal materials and are sheet-shaped, a large part of the output current 7' will overflow through the nickel connecting piece 3' and lose the welding power, so that the current The effective current 8' through the nickel sheet 4' cannot be concentrated at the welding point to form a high temperature. Therefore, the distance a between the positive electrode 5' and the negative electrode 6' needs to be increased to increase the impedance of the nickel connecting sheet 3' to reduce the current flow. Dissipation current through nickel connection piece 3' to ensure successful spot welding

Images