WO2016074426A1 - 一种用于直流无刷电机驱动系统的锂电池快速充电方法 - Google Patents

一种用于直流无刷电机驱动系统的锂电池快速充电方法 Download PDF

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WO2016074426A1
WO2016074426A1 PCT/CN2015/076226 CN2015076226W WO2016074426A1 WO 2016074426 A1 WO2016074426 A1 WO 2016074426A1 CN 2015076226 W CN2015076226 W CN 2015076226W WO 2016074426 A1 WO2016074426 A1 WO 2016074426A1
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charging
voltage
lithium battery
current
motor drive
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French (fr)
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王德洪
廖辉
彭立军
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常州格力博有限公司
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Priority to EP15859002.6A priority Critical patent/EP3220470A4/en
Priority to CA2967056A priority patent/CA2967056A1/en
Priority to RU2017120326A priority patent/RU2017120326A/ru
Publication of WO2016074426A1 publication Critical patent/WO2016074426A1/zh
Priority to US15/590,038 priority patent/US20170244136A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • the present invention relates to the field of battery charging, and in particular to a method for rapidly charging a lithium battery for a DC brushless motor drive system.
  • the charging time of lithium battery is the key to determining whether the power device is used more quickly.
  • the power supply module is the core of the DC brushless motor drive system such as power tools and garden outdoor tools.
  • the existing DC brushless motor drive system uses lithium batteries for power supply.
  • the traditional lithium battery constant voltage constant current charging method uses the full-range constant power charging method. At the beginning stage, the current is large and the charging is fast, but when the charging amount is close to full, when the lithium battery voltage is high, that is, when the remaining capacity is high, the internal storage charge has a small proportion of holes, and the current is charged at a large current, the battery accelerates heating, and the lithium is destroyed.
  • the internal structure of the battery, the charging time is long, the battery generates a large amount of heat during charging, which affects the shortcomings of the lithium battery life.
  • the technical problem to be solved by the present invention is to provide a rapid charging method for a lithium battery for a DC brushless motor driving system, which adopts a constant power charging mechanism when the battery capacity is small, and then adopts linear charging when it is near full power.
  • Mode charging that is, fast trickle charge, and good protection of lithium battery characteristics, widely used in the popularization of lithium battery fast charging method for DC brushless motor drive system Pan market prospects.
  • the present invention provides a rapid charging method for a lithium battery for a DC brushless motor driving system, comprising the following steps:
  • n in step (2) is greater than 10.
  • the charging current at the end of step (2) is less than half of the initial charging current.
  • step (2) the power in step (2) is stepped down.
  • the invention has the beneficial effects that the rapid charging method for the lithium battery of the DC brushless motor driving system of the invention has the advantages of accelerating the charging process, reducing the heating of the battery during the charging process, thereby realizing the charging in a shorter time, and then shortening the charging of the device during the charging of the battery.
  • the advantages of waiting time, etc. have broad market prospects in the popularization of lithium battery rapid charging methods for DC brushless motor drive systems.
  • FIG. 1 is a schematic diagram of charging voltage-current-power of a preferred embodiment of a lithium battery rapid charging method for a brushless DC motor drive system of the present invention.
  • a method for rapidly charging a lithium battery for a DC brushless motor drive system comprising the following steps:
  • Constant power charging phase This phase is recorded as CP.
  • the charging power P is set during charging.
  • the charging current decreases with the voltage and the power remains unchanged.
  • n in step (2) is greater than 10.
  • the charging current at the end in step (2) is less than half of the charging current at the beginning.
  • the power in step (2) is stepped down.
  • the lithium battery rapid charging method can ensure that the charging time of the battery is greatly shortened under the condition that the charging power of the lithium battery is as small as possible.
  • the invention adopts a constant power charging mechanism when the battery capacity is small, that is, a low voltage, a high current, a high voltage and a low current. Since the lithium battery has a low voltage, that is, when the remaining capacity is low, the internal storage charge has a large proportion of holes, and a relatively large current can be used.
  • the lithium battery rapid charging method for the DC brushless motor driving system of the present invention realizes the step charging method by continuously correcting the charging starting voltage at the current stage, and accelerates the charging process.
  • the battery heat is reduced during the charging process, thereby achieving shorter time charging, and then shortening the waiting time of the device when the battery is charged.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Power Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

一种用于直流无刷电机驱动系统的锂电池快速充电方法，包括以下步骤：(1)恒功率充电阶段；(2)线性充电阶段。通过上述方式，该用于直流无刷电机驱动系统的锂电池快速充电方法具有加快充电过程、降低充电过程电池发热、从而实现更短时间充电、继而达到缩短设备在电池充电时的等待时间等优点，在用于直流无刷电机驱动系统的锂电池快速充电方法的普及上有着广泛的市场前景。

Description

一种用于直流无刷电机驱动系统的锂电池快速充电方法 技术领域
本发明涉及电池充电领域，特别是涉及一种用于直流无刷电机驱动系统的锂电池快速充电方法。
背景技术
对于采用锂电池包供电的电动工具和园林工具领域，由于蓄电池的容量是有限的，对于需要长时间使用的工作环境，锂电充电时间是决定用电设备是否更快的继续使用的关键。
供电模块是电动工具、园林户外工具等直流无刷电机驱动系统的核心，现有直流无刷电机驱动系统多采用锂电池进行供电，传统锂电恒压恒流充电方法采用全程恒功率充电方法，起始阶段电流大、充电快，但是当充电量接近充满时，锂电池电压高即剩余容量较高时，内部的存储电荷的空穴比例小，仍大电流充电，电池加速发热，且会破坏锂电池内部结构，充电时间长，充电时电池发热量大，影响锂电使用寿命等缺点。
发明内容
本发明主要解决的技术问题是提供一种用于直流无刷电机驱动系统的锂电池快速充电方法，通过采用在电池容量少的时候采用恒功率充电机制、然后在临近满电时在采用线性充电方式充电，即实现快速涓流充电，又很好的保护锂电特性，在用于直流无刷电机驱动系统的锂电池快速充电方法的普及上有着广 泛的市场前景。
为解决上述技术问题，本发明提供一种用于直流无刷电机驱动系统的锂电池快速充电方法，包括以下步骤：
(1)恒功率充电阶段：充电时设定好充电功率P，根据检测到的锂电电压V计算充电电流I＝P/V，并闭环控制充电电流I，在此充电阶段，充电电流随电压降低、功率保持不变，当检测到锂电池的电压V充至线性充电的起点即进入线性充电阶段；
(2)线性充电阶段：电压在此阶段仍在上升，而电流成阶梯状下降，功率也随之下降，此阶段将起始电压点和结束电压点分为n个点，记为CV1,CV2,CV3,…..,CVn，其中CV1为起始电压，CVn为结束充电电压，同时也将此阶段的最大充电电流和最小充电电流分为n个充电电流，记为I1，I2，I3，….,In，其中I1为起始时的充电电流，In为结束时的充电电流，
(a)当以I1的电流充电，检测到锂电池的电压充电至CV1时，则重新设置CV电压为CV2,同时设置充电电流为I2，
(b)当以I2的电流充电，检测到锂电池的电压充电至CV2时，则重新设置CV电压为CV3,同时设置充电电流为I3，
(c)以此类推，依此将锂电池的电压充电至CVn-1，
(d)当以In的电流充电，检测到锂电池的电压充电至CVn时，线性充电阶段结束，充电结束。
在本发明一个较佳实施例中，步骤(2)中的n大于10。
在本发明一个较佳实施例中，步骤(2)中的结束时的充电电流小于起始时的充电电流的一半。
在本发明一个较佳实施例中，步骤(2)中的功率成阶梯状下降。
本发明的有益效果是：本发明用于直流无刷电机驱动系统的锂电池快速充电方法具有加快充电过程、降低充电过程电池发热、从而实现更短时间充电、继而达到缩短设备在电池充电时的等待时间等优点，在用于直流无刷电机驱动系统的锂电池快速充电方法的普及上有着广泛的市场前景。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1是本发明的用于直流无刷电机驱动系统的锂电池快速充电方法一较佳实施例的充电电压-电流-功率示意图。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
本发明实施例包括：
一种用于直流无刷电机驱动系统的锂电池快速充电方法，包括以下步骤：
(1)恒功率充电阶段：此阶段记为CP，充电时设定好充电功率P，根据检测到的锂电电压V计算充电电流I＝P/V，并闭环控制充电电流I，在此充电阶段，充电电流随电压降低、功率保持不变，当检测到锂电池的电压V充至线性充电的起点即进入线性充电阶段；
(2)线性充电阶段：此阶段记为CV，电压在此阶段仍在上升，而电流成阶梯状下降，功率也随之下降，此阶段将起始电压点和结束电压点分为n个点，记为CV1,CV2,CV3,…..,CVn，其中CV1为起始电压，CVn为结束充电电压，同时也将此阶段的最大充电电流和最小充电电流分为n个充电电流，记为I1，I2，I3，….,In，其中I1为起始时的充电电流，In为结束时的充电电流，
(a)当以I1的电流充电，检测到锂电池的电压充电至CV1时，则重新设置CV电压为CV2,同时设置充电电流为I2，
(b)当以I2的电流充电，检测到锂电池的电压充电至CV2时，则重新设置CV电压为CV3,同时设置充电电流为I3，
(c)以此类推，依此将锂电池的电压充电至CVn-1，
(d)当以In的电流充电，检测到锂电池的电压充电至CVn时，线性充电阶段结束，充电结束。
优选地，步骤(2)中的n大于10。
优选地，步骤(2)中的结束时的充电电流小于起始时的充电电流的一半。
优选地，步骤(2)中的功率成阶梯状下降。
通过该锂电快速充电方法，可保证锂电充电发热量尽量小的情况下，大大缩短电池充电时间。本发明在电池容量少的时候采用恒功率充电机制，即低压高电流，高压低电流，由于锂电池电压低即剩余容量低时，内部的存储电荷的空穴比例大，可采用相对大的电流进行充电，而当锂电池电压高即剩余容量较高 时，内部的存储电荷的空穴比例小，仍大电流充电，电池加速发热，且会破坏锂电池内部结构，所以需要采用低电流充电，而恒功率充电正好能是实现低压大电流，高压小电流，然后在临近满电时在采用线性充电方式充电，即实现快速涓流充电，又很好的保护锂电特性。
本发明用于直流无刷电机驱动系统的锂电池快速充电方法的有益效果是：
一、通过在电池容量少的时候采用恒功率充电机制，保证了锂电池充电发热量尽量小的情况下，大大缩短了锂电池的充电时间；
二、通过在临近满电时在采用线性充电方式充电，即实现快速涓流充电，又很好的保护锂电特性；
三，相对一般的锂电池的线性充电方法，本发明用于直流无刷电机驱动系统的锂电池快速充电方法在现行阶段通过不断修正充电起始电压来实现了阶梯式充电方法，加快了充电过程、降低了充电过程电池发热，从而实现更短时间充电，继而达到缩短设备在电池充电时的等待时间。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书内容所作的等效结构或等效流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (4)

  1. 一种用于直流无刷电机驱动系统的锂电池快速充电方法，其特征在于，包括以下步骤：
    (1)恒功率充电阶段：充电时设定好充电功率P，根据检测到的锂电电压V计算充电电流I＝P/V，并闭环控制充电电流I，在此充电阶段，充电电流随电压降低、功率保持不变，当检测到锂电池的电压V充至线性充电阶段的起点即进入线性充电阶段；
    (2)线性充电阶段：电压在此阶段仍在上升，而电流成阶梯状下降，功率也随之下降，此阶段将起始电压点和结束电压点分为n个点，记为CV1,CV2,CV3,…..,CVn，其中CV1为起始充电电压，CVn为结束充电电压，同时也将此阶段的最大充电电流和最小充电电流分为n个充电电流，记为I1，I2，I3，….,In，其中I1为起始时的充电电流，In为结束时的充电电流，
    (a)当以I1的电流充电，检测到锂电池的电压充电至CV1时，则重新设置CV电压为CV2,同时设置充电电流为I2，
    (b)当以I2的电流充电，检测到锂电池的电压充电至CV2时，则重新设置CV电压为CV3,同时设置充电电流为I3，
    (c)以此类推，依此将锂电池的电压充电至CVn-1，
    (d)当以In的电流充电，检测到锂电池的电压充电至CVn时，线性充电阶段结束，充电结束。
  2. 根据权利要求1所述的用于直流无刷电机驱动系统的锂电池快速充电方法，其特征在于，步骤(2)中的n大于10。
  3. 根据权利要求1所述的用于直流无刷电机驱动系统的锂电池快速充电方法，其特征在于，步骤(2)中的结束时的充电电流小于起始时的充电电流的一半。
  4. 根据权利要求1所述的用于直流无刷电机驱动系统的锂电池快速充电方法，其特征在于，步骤(2)中的功率成阶梯状下降。
PCT/CN2015/076226 2014-11-11 2015-04-10 一种用于直流无刷电机驱动系统的锂电池快速充电方法 WO2016074426A1 (zh)

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EP15859002.6A EP3220470A4 (en) 2014-11-11 2015-04-10 Fast charging method for lithium battery of direct-current brushless motor drive system
CA2967056A CA2967056A1 (en) 2014-11-11 2015-04-10 Method of quick charging a lithium battery for a brushless dc motor drive system
RU2017120326A RU2017120326A (ru) 2014-11-11 2015-04-10 Способ быстрой зарядки литиевой аккумуляторной батареи для системы бесщеточного электропривода постоянного тока
US15/590,038 US20170244136A1 (en) 2014-11-11 2017-05-09 Method of quick charging a lithium battery for a brushless dc motor drive system

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CN201410630146.4A CN104466280B (zh) 2014-11-11 2014-11-11 一种用于直流无刷电机驱动系统的锂电池快速充电方法

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