WO2011120457A2 - 一种电源的开关控制电路及一种供电电路 - Google Patents

一种电源的开关控制电路及一种供电电路 Download PDF

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Publication number
WO2011120457A2
WO2011120457A2 PCT/CN2011/073659 CN2011073659W WO2011120457A2 WO 2011120457 A2 WO2011120457 A2 WO 2011120457A2 CN 2011073659 W CN2011073659 W CN 2011073659W WO 2011120457 A2 WO2011120457 A2 WO 2011120457A2
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WO
WIPO (PCT)
Prior art keywords
switch
contactor
power supply
contact
unit
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PCT/CN2011/073659
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English (en)
French (fr)
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WO2011120457A3 (zh
Inventor
邹善勤
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华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2011/073659 priority Critical patent/WO2011120457A2/zh
Priority to EP11762031.0A priority patent/EP2482412B1/en
Priority to CN201180000687.3A priority patent/CN102282736B/zh
Publication of WO2011120457A2 publication Critical patent/WO2011120457A2/zh
Publication of WO2011120457A3 publication Critical patent/WO2011120457A3/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306—Overdischarge protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits

Definitions

  • the present invention relates to control technology, and more particularly to a switch control circuit for a power supply and a power supply circuit.
  • the switch control circuit of a commonly used battery pack is shown in FIG. 1.
  • the contacts of the battery pack, the load and the contactor are connected in series to form a main circuit; in addition, the positive pole of the battery pack is connected to the first contact of the contactor through a switch.
  • the second contact B of the wire is connected to the negative pole of the battery pack, and the switch is the switch control circuit of the battery pack.
  • the switch control circuit has the following disadvantages: When the connection between the switch and the contactor coil is incorrect, or the battery wiring is incorrect, it is easy to burn the cable or the battery, which affects the reliability of the power supply.
  • the technical problem to be solved by the present invention is to provide a switch control circuit for a power supply and a power supply circuit, which can improve the reliability of power supply.
  • the embodiment of the present invention adopts the following technical solutions:
  • Embodiments of the present invention provide a switch control circuit for a power supply, including:
  • the cathode of the diode is connected to the negative pole of the power source, the anode of the diode is connected to the first end of the short circuit protection component, the second end of the short circuit protection component is connected to the first end of the switch unit, and the second end of the switch unit is connected to the first contact of the contactor, The second contact of the contactor is connected to the positive pole of the power source;
  • the short circuit protection component is used for short circuit protection of the associated circuit;
  • the switch unit is used for performing on/off control of the associated circuit.
  • the embodiment of the invention further provides a power supply circuit, including:
  • the first contact of the contactor is connected to the negative pole of the power supply, the positive pole of the power supply and the second contact of the contactor are respectively used as two output ends of the power supply circuit to supply power to the load;
  • the cathode of the diode is connected to the negative pole of the power source, the anode of the diode is connected to the first end of the short circuit protection component, the second end of the short circuit protection component is connected to the first end of the switch unit, and the second end of the switch unit is connected to the first contact of the contactor, The second contact of the contactor is connected to the positive pole of the power source;
  • the short circuit protection component is used for short circuit protection of the associated circuit; the switch unit is used for on/off control of the associated circuit.
  • the short circuit protection component can prevent damage of a power source or a cable or the like caused by any short circuit, such as a short circuit caused by a wiring error, and the like, and the device can prevent the power source or the cable from being reversed by the power supply or the cable is reversed. Damage; thus increasing the reliability of powering the load.
  • FIG. 1 is a schematic structural view of a prior art control circuit
  • FIG. 2 is a schematic structural diagram of a switch control circuit of a power supply according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of another switch control circuit of a power supply according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a switch control circuit of a third power supply according to an embodiment of the present invention.
  • the cathode of the diode is connected to the negative pole of the power source, and the anode of the diode is connected to the first end of the switch unit through the short circuit protection component, the second end of the switch unit is connected to the first end of the contactor, and the second end of the contactor is connected to the positive pole of the power source;
  • the short circuit protection component is used for short circuit protection of the associated circuit; the switch unit is used for on/off control of the associated circuit.
  • FIG. 2 is a schematic structural diagram of a switch control circuit of a power supply according to an embodiment of the present invention. As shown in FIG. 2, the circuit includes:
  • the power source 100, the load 106, and the contacts of the contactor 101 are connected in series to form a main circuit; specifically, the first contact of the contactor 101 is connected to the negative pole of the power source 100, the anode of the power source 100, and the second contact of the contactor 101 are respectively Two outputs of the power supply circuit for powering the load 106;
  • the positive pole of the power supply 100 is connected to the second contact B of the contactor 101, and the first contact C of the contactor 101 is connected to the second end of the short-circuit protection component RT through the first sub-switch of the double-pole double-throw switch K1, and the short-circuit protection component RT One end is connected to the anode of the diode D, and the cathode of the diode D is connected to the negative pole of the power source 100.
  • the two contacts of the second sub-switch of K1 are respectively connected to the preset voltage VCC and the input end of the detecting unit 102;
  • the detecting unit 102 is configured to: detect a preset voltage signal
  • the alarm display unit 103 is configured to perform an alarm when the detecting unit detects the preset voltage signal.
  • the alarm may be an acousto-optic alarm, an indicator alarm, an LCD alarm display information, an audible alarm, or an upper-end management platform, etc., which is not limited herein.
  • the method may further include:
  • the automatic control unit 104 is configured to control the contact opening and closing of the contactor 101 under the instruction of the controller 105 to control whether the power source 100 is powered;
  • the controller 105 is configured to instruct the automatic control unit 104 to control the contactor 101 according to a preset rule.
  • the detecting unit 102 and the alarm display unit 103 are disposed in the controller 105.
  • the detecting unit 102 and the alarm display unit 103 may also be separated from the controller 105. Set separately; there is no limit here.
  • the contactor 101 When the double-pole double-throw switch K1 is turned off, the contactor 101 is controlled by the automatic control unit 104; and when the contactor 101 is in an open state and the manual power supply 100 is required to supply power to the load, the user controls the double-pole double-throw switch. K1 is closed, and the power source 100, the diode D, the short-circuit protection element RT, the double-pole double-throw switch K1, and the turns of the contactor 101 form a path through which a current flows in the coil 101 of the contactor 101, thereby causing contact of the contactor 101. The point is closed, so that the main circuit becomes a path, and the power source 100 is negative. Power supply.
  • the short circuit protection component RT may be, for example, a self-recovery fuse PTC, a fuse, a thermistor, or the like.
  • the input end of the detecting unit becomes a path between the input voltage Vcc, and the input end of the detecting unit 102 receives the high voltage signal, so that the alarm display unit 103 performs an alarm to make The operator can know that the action of controlling the closing of the double-pole double-throw switch K1 is effective.
  • the short circuit protection element RT can prevent damage of a power source or a cable or the like caused by any short circuit such as a short circuit caused by a wiring error, and the power can be prevented by the diode D. Damage to the power supply or cable, etc. caused by reverse connection or reverse cable connection; thus improving the reliability of power supply to the load.
  • the double-pole double-throw switch K1 can also be replaced with a single-pole single-throw switch K2.
  • the single-pole single-throw switch K2 is connected to the second end of the short-circuit protection element RT and the contactor 101.
  • the input of the detecting unit 102 can be connected to the first contact C of the contactor 101.
  • the contactor 101 When the single-pole single-throw switch K2 is turned off, the contactor 101 is controlled by the automatic control unit 104; and when the contactor 101 is in the open state and the manual power supply 100 is required to supply power to the load, the user controls the single-pole single-throw switch K2 to be closed.
  • the power source 100, the diode D, the short circuit protection element RT, the single-pole single-throw switch K2, and the turns of the contactor 101 form a path through which a current flows in the coil 101, so that the contacts of the contactor 101 are closed.
  • the main circuit becomes a path and the power supply 100 supplies power to the load.
  • the input end of the detecting unit 102 is connected to the first contact C of the contactor 101.
  • the single-pole single-throw switch K2 When the single-pole single-throw switch K2 is closed, a current flows in the coil of the contactor 101, and the contact is closed, so that the first contact C is low. Ping, the input end of the detecting unit receives the low level signal, so that the alarm display unit performs an alarm, so that the operator can know that the action of controlling the double-pole double-throw switch K1 is closed; once the single-pole single-throw switch K2 is disconnected, the contactor The first contact C of 101 becomes a high level, and the input terminal of the detecting unit receives a high level signal, so that the alarm display unit does not operate.
  • a rectifying power supply module 106 may be further disposed at both ends of the load for rectifying the current output to the load to output the electric energy required by the load.
  • the controller 105 may further include an overdischarge detecting unit to detect whether the power source 100 is over-discharged. Specifically, when detecting that the power source voltage drops to a preset value, the controller determines that the battery is to be over-discharged, and automatically controls the contact. The device is disconnected, so that the battery cannot continue to discharge, preventing the power supply voltage from further dropping and damaging the power supply.
  • the switch control circuit and the power supply of the power supply of the embodiment of the present application constitute a power supply circuit for supplying power to the load in the embodiment of the present application.

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  • Protection Of Static Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

一种电源（100）的开关控制电路及一种供电电路。该开关控制电路包括一二极管（D），其阴极连接电源（100）的负极，阳极连接短路保护元件（RT）的第一端。短路保护元件（RT）的第二端与开关单元（K1）的第一端连接，开关单元（K1）的第二端连接接触器（101）的第一接点，接触器（101）的第二接点连接电源（100）的正极。短路保护元件（RT）用于对所属回路进行短路保护。开关单元（K1）用于进行所属回路的通断状态控制。该开关控制电路及供电电路能够提高供电的可靠性。

Description

一种电源的开关控制电路及一种供电电路 技术领域 本发明涉及控制技术， 尤其涉及一种电源的开关控制电路及一种供电电 路。
背景技术 在电源系统中， 常常需要强制电池组给负载供电或进行电池下电保护， 例 如， 当市电下电， 系统故障需要更换时； 或者， 电池电压低于设定的阈值， 而 又需要保障重要业务时； 或者， 进行电源系统的开局调试时， 等等， 都需要对 电池组进行手动强制上电。
常用的一种电池组的开关控制电路如图 1所示， 电池组、 负载以及接触器 的触点串接构成主电路； 另外， 电池组的正极通过一个开关连接接触器的线圏 第一接点 A,线圏的第二接点 B连接电池组的负极，该开关即为电池组的开关 控制电路。 当手动闭合开关时， 电池组以及接触器的线圏构成回路， 接触器的 线圏中流过电流， 从而接触器的触点闭合， 主电路转换为通路， 电池组为负载 供电。
但是， 发明人发现， 该开关控制电路具有以下缺点： 当开关与接触器线圏 之间的连接错误， 或者， 电池接线错误时， 很容易烧毁电缆或者电池， 影响供 电的可靠性。
发明内容
有鉴于此，本发明要解决的技术问题是，提供一种电源的开关控制电路及 一种供电电路， 能够提高供电的可靠性。 为此， 本发明实施例采用如下技术方案：
本发明实施例提供一种电源的开关控制电路， 包括：
二极管的阴极连接电源的负极， 二极管的阳极连接短路保护元件的第一 端，短路保护元件的第二端与开关单元的第一端连接， 开关单元的第二端连接 接触器的第一接点， 接触器的第二接点连接电源的正极； 其中， 所述短路保护元件用于对所属回路进行短路保护； 开关单元用于进 行所属回路的通断控制。
本发明实施例还提供一种供电电路， 包括：
接触器的第一触点连接电源的负极，电源的正极以及接触器的第二触点分 别作为供电电路的两个输出端， 为负载供电；
二极管的阴极连接电源的负极， 二极管的阳极连接短路保护元件的第一 端，短路保护元件的第二端与开关单元的第一端连接， 开关单元的第二端连接 接触器的第一接点， 接触器的第二接点连接电源的正极；
其中， 所述短路保护元件用于对所属回路进行短路保护； 开关单元用于进 行所属回路的通断控制。 对于上述技术方案的技术效果分析如下：
所述短路保护元件可以防止任何短路如接线错误产生的短路等而引起的 电源或者电缆等器件的损坏；而通过所述二极管可以防止电源反接或者电缆反 接所引起的电源或者电缆等器件的损坏； 从而提高了为负载供电的可靠性。
附图说明 图 1为现有技术控制电路结构示意图；
图 2为本发明实施例一种电源的开关控制电路结构示意图；
图 3为本发明实施例另一种电源的开关控制电路结构示意图；
图 4为本发明实施例第三种电源的开关控制电路结构示意图。
具体实施方式 本发明实施例中电源的开关控制电路包括：
二极管的阴极连接电源的负极，二极管的阳极通过短路保护元件与开关单 元的第一端连接， 开关单元的第二端连接接触器的第一端，接触器的第二端连 接电源的正极；
其中， 所述短路保护元件用于对所属回路进行短路保护； 开关单元用于进 行所属回路的通断控制。
以下， 结合附图详细说明本发明实施例电源的开关控制电路的实现。 图 2为本发明实施例的一种电源的开关控制电路结构示意图，如图 2所示， 该电路包括：
电源 100、 负载 106以及接触器 101的触点串接构成主电路； 具体的， 接 触器 101的第一触点连接电源 100的负极， 电源 100的正极以及接触器 101 的第二触点分别作为供电电路的两个输出端， 为负载 106供电；
电源 100的正极连接接触器 101的第二接点 B,接触器 101的第一接点 C 通过双刀双掷开关 K1的第一子开关连接短路保护元件 RT的第二端， 短路保 护元件 RT的第一端连接二极管 D的阳极， 二极管 D的阴极连接电源 100的 负极。
双刀双掷开关 K1的第二子开关的两个触点分别连接预设电压 VCC以及 检测单元 102的输入端；
所述检测单元 102用于： 检测预设电压信号；
告警显示单元 103, 用于当检测单元检测到预设电压信号时， 进行告警。 所述告警可以为声光告警、 指示灯告警、 LCD告警显示信息、 声音告警 或者上 远端管理平台等， 这里并不限定。
其中， 如图 2所示， 还可以包括：
自动控制单元 104, 用于在控制器 105的指示下， 控制接触器 101的触点 打开和闭合， 以对电源 100是否供电进行控制；
控制器 105, 用于根据预设规则指示自动控制单元 104对接触器 101进行 控制。
其中，在图 2中， 所述检测单元 102以及告警显示单元 103设置于控制器 105中； 或者， 如图 3所示， 所述检测单元 102以及告警显示单元 103也可以 与控制器 105分开， 单独设置； 这里并不限制。
对于图 2所示控制电路的工作过程说明如下：
当双刀双掷开关 K1断开时，由自动控制单元 104对接触器 101进行控制； 而一旦接触器 101为打开状态， 而需要手动强制电源 100为负载供电时， 用户 控制双刀双掷开关 K1闭合， 电源 100、 二极管 D、 短路保护元件 RT、 双刀双 掷开关 K1以及接触器 101的线圏形成通路， 所述接触器 101的线圏中有电流 通过， 从而使得接触器 101的触点闭合， 从而主电路变为通路， 电源 100为负 载供电。其中，所述短路保护元件 RT可以为例如自恢复保险丝 PTC,保险丝、 热敏电阻等。
另外， 当双刀双掷开关 K1闭合后， 检测单元的输入端与预设电压 Vcc之 间变成通路， 检测单元 102的输入端接收到高电压信号， 从而告警显示单元 103进行告警， 以便使得操作者能够获知控制双刀双掷开关 K1闭合的动作有 效。
在图 2和图 3所示的控制电路中， 所述短路保护元件 RT可以防止任何短 路如接线错误产生的短路等而引起的电源或者电缆等器件的损坏；而通过所述 二极管 D可以防止电源反接或者电缆反接所引起的电源或者电缆等器件的损 坏； 从而提高了为负载供电的可靠性。
另夕卜， 如图 4所示， 所述双刀双掷开关 K1还可以替换为单刀单掷开关 K2, 此时， 单刀单掷开关 K2连接于短路保护元件 RT的第二端与接触器 101 的第一接点 C之间； 此时， 检测单元 102的输入端可以连接接触器 101的第 一接点 C。
对于图 4所示控制电路的工作过程说明如下：
当单刀单掷开关 K2断开时，由自动控制单元 104对接触器 101进行控制； 而一旦接触器 101为打开状态， 而需要手动强制电源 100为负载供电时， 用户 控制单刀单掷开关 K2闭合， 电源 100、 二极管 D、 短路保护元件 RT、 单刀单 掷开关 K2以及接触器 101的线圏形成通路， 所述接触器 101的线圏中有电流 通过， 从而使得接触器 101的触点闭合， 从而主电路变为通路， 电源 100为负 载供电。
另外， 检测单元 102的输入端与接触器 101的第一接点 C连接， 当单刀 单掷开关 K2闭合时， 接触器 101的线圏中流过电流， 触点闭合， 从而第一接 点 C为低电平， 检测单元的输入端接收到低电平信号， 从而告警显示单元进 行告警， 以便使得操作者能够获知控制双刀双掷开关 K1闭合的动作有效； 一 旦单刀单掷开关 K2断开， 接触器 101的第一接点 C变为高电平， 检测单元的 输入端接收到高电平信号， 从而告警显示单元不工作。
在图 2~图 4所示的控制电路中， 在负载的两端还可以设置整流电源模块 106, 用于对输出给负载的电流进行整流， 以便输出负载所需的电能。 而且，控制器 105还可以包括过放电检测单元， 以检测电源 100是否过放 电， 具体的， 当检测到电源电压下降到预设值时， 控制器判断为电池将要过放 电， 就会自动控制接触器断开， 从而使得电池不能继续放电， 防止了电源电压 进一步下降而损坏电源。
对于图 2~图 4所示的电路结构， 本申请实施例电源的开关控制电路以及 电源即构成了本申请实施例的为负载进行供电的供电电路。
以上所述仅是本发明的优选实施方式， 应当指出， 对于本技术领域的普通 技术人员来说， 在不脱离本发明原理的前提下， 还可以做出若干改进和润饰， 这些改进和润饰也应视为本发明的保护范围。
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Claims

权 利 要 求
1、 一种电源的开关控制电路， 其特征在于， 包括：
二极管的阴极连接电源的负极， 二极管的阳极连接短路保护元件的第一 端，短路保护元件的第二端与开关单元的第一端连接， 开关单元的第二端连接 接触器的第一接点， 接触器的第二接点连接电源的正极；
其中， 所述短路保护元件用于对所属回路进行短路保护； 开关单元用于进 行所属回路的通断控制。
2、 根据权利要求 1所述的电路， 其特征在于， 所述开关单元为双刀双掷 开关， 其中， 该开关的一个子开关连接于接触器的第一接点与短路保护元件的 第二端之间； 或者， 所述开关单元为单刀单掷开关， 该开关串接于接触器的第 一接点与短路保护元件的第二端之间。
3、 根据权利要求 2所述的电路， 其特征在于， 还包括：
检测单元， 当所述开关单元为双刀双掷开关时， 所述检测单元的输入端通 过所述双刀双掷开关的另一个子开关连接预设电压；当所述开关单元为单刀单 掷开关时， 该检测单元的输入端连接接触器的第一接点； 所述检测单元用于检 测预设电压信号；
告警显示单元， 用于当检测单元检测到预设电压信号时， 进行告警。
4、 一种供电电路， 其特征在于， 包括：
接触器的第一触点连接电源的负极，电源的正极以及接触器的第二触点分 别作为供电电路的两个输出端， 为负载供电；
二极管的阴极连接电源的负极， 二极管的阳极连接短路保护元件的第一 端，短路保护元件的第二端与开关单元的第一端连接， 开关单元的第二端连接 接触器的第一接点， 接触器的第二接点连接电源的正极；
其中， 所述短路保护元件用于对所属回路进行短路保护； 开关单元用于进 行所属回路的通断控制。
5、 根据权利要求 4所述的供电电路， 其特征在于， 所述开关单元为双刀 双掷开关， 其中， 该开关的一个子开关连接于接触器的第一接点与短路保护元 件的第二端之间； 或者， 所述开关单元为单刀单掷开关， 该开关串接于接触器 的第一接点与短路保护元件的第二端之间。
6、 根据权利要求 5所述的供电电路， 其特征在于， 还包括：
检测单元， 当所述开关单元为双刀双掷开关时， 所述检测单元的输入端通 过所述双刀双掷开关的另一个子开关连接预设电压；当所述开关单元为单刀单 掷开关时， 该检测单元的输入端连接接触器的第一接点； 所述检测单元用于检 测预设电压信号；
告警显示单元， 用于当检测单元检测到预设电压信号时， 进行告警。
7、 根据权利要求 4至 6任一项所述的供电电路， 其特征在于， 还包括： 整流电源模块， 该模块的两端分别与供电电路的两个输出端连接， 用于对 输出给负载的电流进行整流， 以便输出负载所需的电能。
PCT/CN2011/073659 2011-05-04 2011-05-04 一种电源的开关控制电路及一种供电电路 WO2011120457A2 (zh)

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CN107505585A (zh) * 2017-08-29 2017-12-22 国家电网公司 一种针对供电线路三相电流互感器二次回路极性检测的装置
CN107505585B (zh) * 2017-08-29 2024-02-06 国家电网公司 一种针对供电线路三相电流互感器二次回路极性检测的装置
CN109659897A (zh) * 2018-12-12 2019-04-19 珠海格力电器股份有限公司 一种保护电路及伺服驱动器
CN114062959A (zh) * 2021-12-15 2022-02-18 广州格兴全电力科技有限公司 一种直流绝缘系统中交流窜入直流故障检测系统及方法
CN114062959B (zh) * 2021-12-15 2023-08-08 广州格兴全电力科技有限公司 一种直流绝缘系统中交流窜入直流故障检测系统及方法

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