The invention discloses a new energy automobile lithium battery charging and discharging protection circuit and a controllable voltage source adjusting method. The protection circuit comprises an over-charge protection module, a voltage control module, an over-current operation module, a discharge protection module and an over-discharge adjustment module, and a triode Q3 in the over-charge protection module obtains a feedback voltage value of the voltage control module through a base electrode end, so that an emitter electrode end is conducted to prevent over-charge voltage from passing through; a transistor Q6 in the voltage control module serves as a contactless switch to transmit control ground voltage to the over-current operation module; an operational amplifier U2 in the over-currentoperation module starts a protection device by comparing a preset ground current parameter and a received current, and a capacitor C4 provides a storage voltage for the operational amplifier U2 to improve the operation speed; a diode D7 in the discharge protection module is used for unidirectional output of the voltage to prevent reverse transmission of the voltage during discharge; and a capacitor C8 in the over-discharge adjusting module is used for generating power shortage of a lithium battery B1 during over-discharge so as to provide a storage voltage to reduce the damage of discharge equipment.

    本发明公开了一种新能源汽车锂电池充放电保护电路及可控电压源调节方法,包括:过充保护模块、电压控制模块、过流运算模块、放电保护模块、过放调节模块,所述过充保护模块中三极管Q3通过基极端获得电压控制模块反馈电压值,使发射极端导通阻碍过充电压经过;所述电压控制模块中晶体管Q6做无触点开关将控制地电压传递给过流运算模块;所述过流运算模块中运算放大器U2通过设定地电流参数与接收的电流进行对比保护装置的启动,电容C4给运算放大器U2提供储存电压提高运算速度;所述放电保护模块中二极管D7用于电压的单向输出阻止放电时电压反向传输;所述过放调节模块中电容C8用于过放时锂电池B1出现亏电,进而提供储存电压降低放电设备损伤。


    Access

    Download


    Export, share and cite



    Title :

    New energy automobile lithium battery charging and discharging protection circuit and controllable voltage source adjusting method


    Additional title:

    一种新能源汽车锂电池充放电保护电路及可控电压源调节方法


    Contributors:
    JIANG YONG (author)

    Publication date :

    2020-07-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung





    Battery charging and discharging control circuit and method, and new energy automobile

    LUO XIANKAI / LIU GANG / PAN WENWU | European Patent Office | 2020

    Free access

    Apparatus and method for adjusting charging or discharging voltage of battery

    SONG JUN HYUK / KIM EUN KYUNG / LEE JOO SUNG | European Patent Office | 2019

    Free access