Lithium ion secondary battery

Abstract

The invention provides a lithium ion secondary battery. The lithium ion secondary battery comprises a lithium ion battery cell, a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor, a label, a steel shell, a MicroUSB interface, a protection IC, an integrated IC, an inductor, an LED lamp, a plastic part, a hard FR-4 substrate and a metal cap, wherein the MicroUSB interface is arranged on the positive end surface of the battery, so that multiple integrated functions of charging of the MicroUSB interface, constant voltage output, chargingmanagement and protection, and over-charging, over-discharging and over-current protection are realized. Compared with the prior art, the lithium ion secondary battery disclosed by the invention is simple in process, easy to install, high in integration efficiency, high in reliability, relatively high in capacity and relatively low in cost.

Description

technical field [0001] The present invention relates to a lithium-ion secondary battery, in particular to a battery that integrates multiple functions such as constant voltage output, charging management, charging protection, and battery protection (including overcharge protection, overdischarge protection, and overcurrent protection). The upper end is equipped with a MicroUSB interface and a charging input function, and also has a high-capacity single-plate lithium-ion secondary battery. Background technique [0002] In the process of actual use of lithium-ion secondary batteries, it is often necessary to integrate corresponding charging circuits, protection circuits, interfaces, structural parts, etc., on the one hand, to meet the needs of lithium-ion secondary battery safety management and protection, on the other hand, to In order to meet the needs of functional applications. For example, the constant voltage 1.5V output circuit can be integrated with the lithium-ion se...

AI Technical Summary

Problems solved by technology

[0003] However, the existing integration methods have the following problems: firstly, the integration process is complicated

Due to the need for various components such as integrated circuit boards, circuit components, protective casings, input interfaces, and output interfaces, the integration is relatively difficult, and the integration effect and appearance are not ideal. The existing integration methods often lead to complex processing techniques and space constraints. Low utilization rate and poor appearance

For example, multiple plastic parts or multiple circuit boards are often arranged in the structure, which leads to the need for positioning and assembling of multiple parts, and the process is very complicated.

The second is that the efficiency of integration is not high. The existing method of setting auxiliary structural parts has low integration efficiency. Various auxiliary structural parts usually occupy a large amount of battery internal space, resulting in only small-sized low-capacity batteries. Compared with the primary battery, the capacity advantage of the integrated lithium-ion secondary battery is not obvious

Especially for small-sized batteries, such as AAA-type batteries, due to the overall small size of the battery, it is difficult to integrate

The third is that the reliability of integration is not high, unreasonable structure, complex processing technology, low integration efficiency, many factors lead to the overall reliability of the final integrated battery is not high

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