WO2017036120A1 - 一种锂电池管理系统及其控制方法 - Google Patents

一种锂电池管理系统及其控制方法 Download PDF

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Publication number
WO2017036120A1
WO2017036120A1 PCT/CN2016/077169 CN2016077169W WO2017036120A1 WO 2017036120 A1 WO2017036120 A1 WO 2017036120A1 CN 2016077169 W CN2016077169 W CN 2016077169W WO 2017036120 A1 WO2017036120 A1 WO 2017036120A1
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management system
battery management
battery pack
switch
lithium battery
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PCT/CN2016/077169
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English (en)
French (fr)
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庄宪
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常州格力博有限公司
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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • 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

Definitions

  • the invention relates to a lithium battery management system and a control method thereof, in particular to a lithium battery management system with simple operation and low power consumption for garden tools and electric tools and a control method thereof.
  • lithium battery management systems on the market need to completely shut down their circuits in order to reduce power consumption when they are not in operation. Therefore, the user needs to open a dedicated start switch on the battery pack before using the external device.
  • the external device can be a garden tool or a power tool. Due to the above lithium battery management system, it is necessary to provide a dedicated switch on the battery pack to realize opening and closing, which is complicated in operation and high in cost.
  • the present invention provides a lithium battery management system with simple operation and low power consumption and a control method thereof.
  • the lithium battery management system adopts a technical solution: a lithium battery management system, including a battery pack composed of a plurality of lithium batteries for providing power; and a battery for controlling the output current of the battery pack to be turned on or off a packet output switch, the battery pack output switch being a normally open switch; and a battery management system control unit for controlling opening or closing of the battery pack output switch; and the battery pack The output resistance of the output switch is set in parallel.
  • the output resistor is a resistor having a resistance of a thousand ohms.
  • the control method of the lithium battery management system is as follows:
  • the control circuit of the external device When the startup switch of the external device is turned on, the control circuit of the external device is activated and outputs a wake-up control signal to the battery management system control unit;
  • the battery management system control unit that receives the wake-up control signal outputs a switch control signal to the battery pack output switch to close the normally open switch;
  • the closed normally open switch returns to a normally open state, and the battery management system control unit is in a fully closed state.
  • the invention realizes the opening or closing of the lithium battery management system by connecting or disconnecting the battery pack with the lithium battery management system and the external device, and realizes the special switch in the prior art when the user operates the external device.
  • the function has the beneficial effects of reducing cost and convenient operation.
  • FIG. 1 is a schematic view of a lithium battery management system of the present invention
  • FIG. 2 is a flow chart of a method of controlling a lithium battery management system of the present invention.
  • the external device specifically refers to a DC garden tool or a DC power tool driven by a lithium battery pack, and specifically, may be a lawn mower, a lawn mower, a pruning machine, a hair dryer, etc.
  • Garden tools or electric tools such as electric drills, electric circular saws, and reciprocating saws. Therefore, the battery pack, the battery management system control unit, the battery pack output switch and the output resistor composed of a plurality of lithium batteries shown in FIG.
  • the lithium battery management system of the present invention can work; when the lithium battery pack is disconnected from the external device, the lithium battery management system of the present invention stops working.
  • the lithium battery management system specifically includes: a battery pack composed of a plurality of lithium batteries for supplying power; and a battery pack output switch for controlling whether the output current of the battery pack is turned on or off, wherein the battery
  • the packet output switch is a normally open switch; and a battery management system for controlling opening or closing of the battery pack output switch a control unit; and an output resistor disposed in parallel with the battery pack output switch.
  • the battery pack when the lithium battery pack is connected to the external device, the battery pack provides a battery circuit through the output resistor through an output resistor having a resistance value of one thousand ohms to the external device when the battery pack output switch is disconnected. , that is, the circuit formed by the positive battery pack ⁇ external device ⁇ output resistor ⁇ negative battery pack.
  • the battery current will flow through the external device and the output resistor until the input capacitor voltage inside the external device is consistent with the battery pack voltage, and the external device can obtain the startup energy that can be turned on. But because of the presence of the output resistor, the peripherals are unable to get a working current before the battery pack output switch is closed.
  • the control circuit of the external device Only when the user turns on the activation switch of the external device, the control circuit of the external device is activated and outputs a wake-up control signal to the battery management system control unit, and then the battery management system control unit that receives the wake-up control signal outputs a switch.
  • the control signal is sent to the battery pack output switch, thereby closing the normally open switch, thereby causing the output resistor to be short-circuited, so that the battery pack can continuously supply power to the external device, and the external device can work normally.
  • FIG. 2 is a flow chart of a method of controlling a lithium battery management system of the present invention.
  • the control method of the lithium battery management system is as follows:
  • Step 1 connecting the battery pack having the lithium battery management system to the external device
  • Step 2 When the startup switch of the external device is turned on, the control circuit of the external device is activated and outputs a wake-up control signal to the battery management system control unit;
  • Step 3 The battery management system control unit that receives the wake-up control signal outputs a switch control signal to the battery pack output switch to close the normally open switch;
  • Step 4 When the battery pack having the lithium battery management system is disconnected from the external device, the closed normally open switch returns to a normally open state, and the battery management system control unit is completely closed. state.
  • the present invention realizes the opening or closing of the lithium battery management system by connecting or disconnecting the battery pack and the external device having the lithium battery management system, and realizes the present when the user operates the external device.
  • the function of the special switch in the technology has the beneficial effects of reducing cost and convenient operation.

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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)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

一种锂电池管理系统及其控制方法，其包括用于提供动力的由若干锂电芯组成的电池组；以及用于控制电池组输出电流导通或断开的电池包输出开关，电池包输出开关为常开型开关；以及用于控制电池包输出开关开启或闭合的电池管理系统控制单元；以及与电池包输出开关并联设置的输出电阻。该系统通过将具有锂电池管理系统的电池包与外接设备接入或者断开来实现锂电池管理系统的开启或者关闭，在用户操作外接设备时即实现了现有技术中的专用开关的功能，具有降低成本、操作方便等有益效果。

Description

一种锂电池管理系统及其控制方法 技术领域
本发明涉及到一种锂电池管理系统及其控制方法，尤其涉及一种用于园林工具、电动工具用的具有操作简单、低功耗的锂电池管理系统及其控制方法。
背景技术
目前，市面上的很多锂电池管理系统在非工作状态时为降低功耗须完全关闭自身电路，因而在使用时用户需要先打开电池组上的专用启动开关，然后才能正常使用外接设备，所述外接设备可以是园林工具或者电动工具。由于上述锂电池管理系统，需要在电池组上设置专用开关以实现启闭，操作复杂，且成本较高。
发明内容
为解决上述技术问题，本发明提供一种操作简单、低功耗的锂电池管理系统及其控制方法。
所述锂电池管理系统采用技术方案为：一种锂电池管理系统，包括用于提供动力的由若干锂电芯组成的电池组；以及用于控制所述电池组输出电流导通或断开的电池包输出开关，所述电池包输出开关为常开型开关；以及用于控制所述电池包输出开关开启或闭合的电池管理系统控制单元；以及与所述电池包 输出开关并联设置的输出电阻。
优选的，所述输出电阻采用阻值为千欧级的电阻。
所述的锂电池管理系统的控制方法为：
步骤一：
将具有所述锂电池管理系统的电池包接入外接设备；
步骤二：
当打开所述外接设备的启动开关时，外接设备的控制电路被启动并输出一个唤醒控制信号给所述电池管理系统控制单元；
步骤三：
接收到唤醒控制信号的电池管理系统控制单元将输出一个开关控制信号给所述电池包输出开关以将常开型开关闭合；
步骤四：
当将具有所述锂电池管理系统的电池包与外接设备断开时，所述闭合的常开型开关恢复常开状态，所述电池管理系统控制单元处于完全关闭状态。
本发明通过将具有所述锂电池管理系统的电池包与外接设备的接入或者断开来实现锂电池管理系统的开启或者关闭，在用户操作外接设备时即实现了现有技术中的专用开关的功能，具有降低成本、操作方便等有益效果。
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是本发明锂电池管理系统的示意图；
图2是本发明锂电池管理系统控制方法的流程图。
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。
图1是本发明锂电池管理系统的示意图。如图1所示，本发明所述的外接设备具体是指由锂电池包驱动的直流园林工具或直流电动工具，具体而言，可以是割草机、打草机、修枝机、吹风机等园林工具类产品，或者是电钻、电圆锯、往复锯等电动工具类产品。因此，图1所示的由若干锂电芯组成的电池组、电池管理系统控制单元、电池包输出开关及输出电阻均是设置在锂电池包内的组件，当锂电池包接入外接设备时，本发明锂电池管理系统方可工作；当锂电池包与外接设备断开时，本发明锂电池管理系统即停止工作。所述锂电池管理系统，具体包括：用于提供动力的由若干锂电芯组成的电池组；以及用于控制所述电池组输出电流导通或断开的电池包输出开关，其中，所述电池包输出开关为常开型开关；以及用于控制所述电池包输出开关开启或闭合的电池管理系统 控制单元；以及与所述电池包输出开关并联设置的输出电阻。
具体而言，当锂电池包接入外接设备时，由于所述电池包输出开关断开，所述电池组通过一个具有千欧级电阻值的输出电阻给外接设备提供一个通过输出电阻的电池回路，即由电池组正极→外接设备→输出电阻→电池组负极形成的回路。通过这个回路，电池的电流将分别流过外接设备和输出电阻，直到外接设备内部的输入电容电压与电池组电压一致，此时外接设备就能够获得可以开机的启动能量。但同样因为输出电阻的存在，电池包输出开关没有闭合之前外设都无法获得能够正常工作的电流。
只有当用户在打开外接设备的启动开关时，外接设备的控制电路被启动并输出一个唤醒控制信号给所述电池管理系统控制单元，然后接收到唤醒控制信号的电池管理系统控制单元将输出一个开关控制信号给所述电池包输出开关，进而将常开型开关闭合，因此使得输出电阻被短路，实现电池组给外接设备持续供电的功能，外接设备方可正常工作。
图2是本发明锂电池管理系统控制方法的流程图。所述的锂电池管理系统的控制方法为：
步骤一：将具有所述锂电池管理系统的电池包接入外接设备；
步骤二：当打开所述外接设备的启动开关时，外接设备的控制电路被启动并输出一个唤醒控制信号给所述电池管理系统控制单元；
步骤三：接收到唤醒控制信号的电池管理系统控制单元将输出一个开关控制信号给所述电池包输出开关以将常开型开关闭合；
步骤四：当将具有所述锂电池管理系统的电池包与外接设备断开时，所述闭合的常开型开关恢复常开状态，所述电池管理系统控制单元处于完全关闭状 态。
综上所述，本发明是通过将具有所述锂电池管理系统的电池包与外接设备的接入或者断开来实现锂电池管理系统的开启或者关闭，在用户操作外接设备时即实现了现有技术中的专用开关的功能，具有降低成本、操作方便等有益效果。
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 (3)

  1. 一种锂电池管理系统，其特征在于：包括，
    用于提供动力的由若干锂电芯组成的电池组；
    以及用于控制所述电池组输出电流导通或断开的电池包输出开关，且所述电池包输出开关为常开型开关；
    以及用于控制所述电池包输出开关开启或闭合的电池管理系统控制单元；
    以及与所述电池包输出开关并联设置的输出电阻。
  2. 根据权利要求1所述的锂电池管理系统，其特征在于：所述输出电阻采用阻值为千欧级的电阻。
  3. 一种如权利要求1或2所述的锂电池管理系统的控制方法，其操作步骤为：
    步骤一：
    将具有所述锂电池管理系统的电池包接入外接设备；
    步骤二：
    当打开所述外接设备的启动开关时，外接设备的控制电路被启动并输出一个唤醒控制信号给所述电池管理系统控制单元；
    步骤三：
    接收到唤醒控制信号的电池管理系统控制单元将输出一个开关控制信号给所述电池包输出开关以将常开型开关闭合；
    步骤四：
    当将具有所述锂电池管理系统的电池包与外接设备断开时，所述闭合的常开型开关恢复常开状态，所述电池管理系统控制单元处于完全关闭状态。
PCT/CN2016/077169 2015-08-28 2016-03-23 一种锂电池管理系统及其控制方法 WO2017036120A1 (zh)

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CN112265471B (zh) * 2020-10-27 2022-03-22 格力博(江苏)股份有限公司 电池包通断控制系统

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