Lithium battery protection circuit with LED lamp display

Abstract

The utility model discloses a lithium battery protection circuit with LED lamp display, a lithium battery is connected with a charging adapter for charging, the lithium battery protection circuit comprises a protection module and a battery pack management module, and the protection module and the battery pack management module are respectively connected with the lithium battery and the charging adapter. Charging over-voltage protection, discharging under-voltage protection, charging over-current protection, discharging over-current protection, short-circuit protection and real-time display of the used electricity quantity of the battery are realized. And the battery pack management module adopts a battery pack manager BQ40Z50-R2. The battery pack manager BQ40Z50-R2 is connected with the lithium battery and the LED lamp, collects the voltage of the lithium battery, calculates the electric quantity information, and controls the LED lamp to display the electric quantity information. According to the lithium battery protection circuit with the LED lamp display, overvoltage, undervoltage and charging and discharging current of the lithium battery are protected, and the electricity consumption of the battery pack is displayed in real time.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium ion battery technical field, especially relate to a lithium battery protection circuit with LED lamp display. BACKGROUND

[0002] Lithium battery has the advantages of high energy, long service life, high rated voltage, high power bearing, low self-discharge rate, light weight, strong high and low temperature adaptability, but has the shortcomings of poor safety, need protection circuit to prevent overcharge, overdischarge, overcurrent, short circuit, over temperature protection etc.

[0003] The prior art lithium battery protection circuit design scheme has the following problems: the traditional lithium battery protection circuit only has some functions of protecting the overvoltage, undervoltage, charging and discharging current of lithium battery, and cannot realize real-time display of the battery pack power consumption. UTILITY MODEL CONTENTS

[0004] The utility model aims at: in order to solve above-mentioned problem, the utility model provides a lithium battery protection circuit with LED lamp display, the overvoltage, undervoltage, charging and discharging current of lithium battery are protected, and the battery pack power consumption is displayed in real time.

[0005] The technical scheme of the utility model is:

[0006] The lithium battery protection circuit with LED lamp display, the lithium battery is connected charging by charging adapter, and includes protection module and battery pack management module, and the protection module and battery pack management module are connected with lithium battery and charging adapter respectively, realize charging overvoltage protection discharge undervoltage protection, charging overcurrent protection, discharge overcurrent protection, short circuit protection and real-time display battery power consumption.

[0007] Preferably, the battery pack management module adopts battery pack manager BQ40Z50-R2.

[0008] Preferably, the battery pack manager BQ40Z50-R2 is connected with lithium battery and LED lamp, collects lithium battery voltage, calculates power information, and controls LED lamp to display power information.

[0009] Preferably, the lithium battery is 4 single cells in series lithium battery pack, and the battery pack manager BQ40Z50-R2 collects the voltage of each single cell.

[0010] Preferably, the LED lamp is four: LED1, LED2, LED3, LED4, wherein LED1, LED2 are reversely connected in parallel between the pin LEDCNTLA of battery pack manager BQ40Z50-R2 and LEDCNTLB;LED3, LED4 are reversely connected in parallel between the pin LEDCNTLB of battery pack manager BQ40Z50-R2 and LEDCNTLC.

[0011] Preferably, the protection module adopts lithium battery protection chip SC5550FAAB.

[0012] The utility model discloses a lithium battery protection circuit with LED lamp display has the advantages that:

[0013] The lithium battery protection circuit with LED lamp display provided by the utility model protects overvoltage, undervoltage and charge and discharge current of lithium battery and displays battery pack power consumption in real time. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model will be further described in connection with the drawings and embodiments:

[0015] Figure 1 It is protection module schematic diagram of lithium battery protection circuit with LED lamp display of the utility model;

[0016] Figure 2 It is battery pack management module schematic diagram of lithium battery protection circuit with LED lamp display of the utility model. DETAILED DESCRIPTION

[0017] The lithium battery protection circuit with LED lamp display of the utility model, the lithium battery is connected charging by charging adapter, includes protection module and battery pack management module, and is respectively as shown in Figure 1 、 2 Protection module and battery pack management module are connected lithium battery and charging adapter respectively, realize charging overvoltage protection discharge undervoltage protection, charging overcurrent protection, discharge overcurrent protection, short circuit protection and real-time display battery power consumption.

[0018] Figure 1 In the specific embodiment, the charging pin P- of the charging adapter is connected to the negative pole of the lithium battery through the charging and discharging MOS tube, the charging pin P+ is connected to the positive pole of the lithium battery through the fuse F1, the protection module and the battery pack management module are current-limiting charging control modules, and the charging and discharging of the charging adapter is controlled through the charging and discharging MOS tubes Q1-Q4.

[0019] The protection module adopts lithium battery protection chip SC5550FAAB. The lithium battery is a lithium battery pack with four single cells connected in series, and the lithium battery protection chip SC5550FAAB collects the voltage of each battery cell to protect the charging.

[0020] The battery pack management module adopts a battery pack manager BQ40Z50-R2. The battery pack manager BQ40Z50-R2 is connected to the lithium battery and the LED lamp, collects the voltage of the lithium battery, calculates the power information, and controls the LED lamp to display the power information. The lithium battery is a lithium battery pack with four single cells connected in series, and the battery pack manager BQ40Z50-R2 collects the voltage of each single cell.

[0021] The LED lamp is four: LED1, LED2, LED3, LED4, wherein LED1, LED2 are connected in reverse parallel between the pins LEDCNTLA, LEDCNTLB of the battery pack manager BQ40Z50-R2;LED3, LED4 are connected in reverse parallel between the pins LEDCNTLB, LEDCNTLC of the battery pack manager BQ40Z50-R2.

[0022] The battery pack manager BQ40Z50-R2 sets four LED lamp parameters through the Battery Management Studio host computer software, such as: the battery pack 100% power corresponds to four LED lights full brightness, the battery pack 50% power corresponds to two LED lights, the battery pack discharges to the under-voltage four LED alarm display, the battery pack charging process LED lamp real-time display charges how much. The battery pack discharging process LED lamp real-time display discharges how much.

[0023] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and it cannot limit the protection scope of the present application. Any modification made according to the spirit and essence of the main technical scheme of the present application should be covered within the protection scope of the present application.

Claims

1. A lithium battery protection circuit with LED light display, the lithium battery is connected to charge by a charging adapter, characterized in that, The application relates to a lithium battery protection device, which comprises a protection module and a battery pack management module, wherein the protection module and the battery pack management module are connected with a lithium battery and a charging adapter respectively, overcharge protection, discharge under-voltage protection, charging over-current protection, discharge over-current protection, short circuit protection and real-time display of battery power consumption are realized, the battery pack management module adopts a battery pack manager BQ40Z50-R2, the battery pack manager BQ40Z50-R2 is connected with the lithium battery and an LED lamp, collects the voltage of the lithium battery, calculates power information and controls the LED lamp to display the power information, the lithium battery is a lithium battery pack with four single bodies connected in series, the battery pack manager BQ40Z50-R2 collects the voltage of each single body, the LED lamp is four, namely LED1, LED2, LED3 and LED4, LED1 and LED2 are connected in reverse parallel between the pins LEDCNTLA and LEDCNTLB of the battery pack manager BQ40Z50-R2, LED3 and LED4 are connected in reverse parallel between the pins LEDCNTLB and LEDCNTLC of the battery pack manager BQ40Z50-R2, and the protection module adopts a lithium battery protection chip SC5550FAAB. ​ ​ ​ ​ ​

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