WO2021057407A1 - New energy vehicle charging protection device relay on-off detection system and method - Google Patents

New energy vehicle charging protection device relay on-off detection system and method Download PDF

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WO2021057407A1
WO2021057407A1 PCT/CN2020/112792 CN2020112792W WO2021057407A1 WO 2021057407 A1 WO2021057407 A1 WO 2021057407A1 CN 2020112792 W CN2020112792 W CN 2020112792W WO 2021057407 A1 WO2021057407 A1 WO 2021057407A1
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relay
detection
electrically
triode
pole
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PCT/CN2020/112792
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French (fr)
Chinese (zh)
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宋小辉
黄龙强
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深圳市利成科技有限公司
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Publication of WO2021057407A1 publication Critical patent/WO2021057407A1/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327Testing of circuit interrupters, switches or circuit-breakers

Abstract

A new energy vehicle charging protection device relay on-off detection system and method in the technical field of circuit detection, being based on a dual relay charging device comprising an L-pole relay and an N-pole relay. A first feedback circuit is provided between an input end of the L-pole relay and an output end of the N-pole relay, and a second feedback circuit is provided between an input end of the N-pole relay and an output end of the L-pole relay. By detecting turning on and turning off of the two circuits, the on-off of the two relays can be determined, so that the effects of self-detection of relay failures of the system and the increase of user safety can be achieved.

Description

新能源汽车充电保护装置继电器通断检测系统及方法New energy vehicle charging protection device relay on-off detection system and method 技术领域Technical field
本发明涉及电路检测技术领域,具体涉及新能源汽车充电保护装置继电器通断检测系统及方法。The invention relates to the technical field of circuit detection, in particular to a new energy vehicle charging protection device relay on-off detection system and method.
背景技术Background technique
随着新能源汽车越来越普及,充电枪以及充电桩的安全性要求越来越高。充电枪盒子以及充电桩内的控制板中有两个继电器,分别控制L、N两根回路的通断。As new energy vehicles become more and more popular, the safety requirements for charging guns and charging piles are getting higher and higher. There are two relays in the charging gun box and the control board in the charging pile to control the on and off of the L and N loops respectively.
技术问题technical problem
已有的技术只是通过控制系统控制继电器的通断,并没有针对每个继电器的实际通断结果进行检查验证,这样不但不能做到自我定位故障,甚至给用户的安全性带来一定的隐患。一旦继电器发生故障,如果是不能正常接通,则无法正常充电;如果是发生粘连不能断开,则会给用户带来触电的危险。The existing technology only controls the on and off of the relay through the control system, and does not check and verify the actual on and off results of each relay. This not only fails to locate the fault by itself, but even brings certain hidden dangers to the safety of the user. Once the relay fails, if it cannot be connected normally, it cannot be charged normally; if it is stuck and cannot be disconnected, it will bring the user a risk of electric shock.
技术解决方案Technical solutions
本发明的目的是克服现有技术的不足和缺陷,提供一种新能源汽车充电保护装置继电器通断检测系统及方法,能够针对L、N两根回路单独检测通断结果的方法。The purpose of the present invention is to overcome the shortcomings and defects of the prior art, and provide a new energy vehicle charging protection device relay on-off detection system and method, which can independently detect the on-off results of the two loops of L and N.
本发明的目的是通过以下技术方案来实现的:新能源汽车充电保护装置继电器通断检测系统,包含L极继电器和N极继电器的双继电器充电装置,在所述L极继电器的输入端与N极继电器的输出端接入第一反馈电路,在所述L极继电器的输出端与N极继电器的输入端接入第二反馈电路。The purpose of the present invention is achieved through the following technical solutions: a new energy vehicle charging protection device relay on-off detection system, a double relay charging device including an L pole relay and an N pole relay, and the input terminal of the L pole relay is connected to the N pole. The output terminal of the pole relay is connected to the first feedback circuit, and the output terminal of the L pole relay and the input terminal of the N pole relay are connected to a second feedback circuit.
具体的,所述第一反馈电路中的元器件包括第一二极管、第一光电耦合器和第一三极管,所述L极继电器的输入端与第一二极管的正极电连接,所述第一二极管的负极通过第一光电耦合器的连接面与N极继电器的输出端电连接,所述第一光电耦合器的输出面与所述第一三极管的基极电连接,所述第一三极管的发射极与MCU电连接。Specifically, the components in the first feedback circuit include a first diode, a first photocoupler, and a first triode, and the input end of the L-pole relay is electrically connected to the anode of the first diode , The cathode of the first diode is electrically connected to the output terminal of the N-pole relay through the connecting surface of the first photocoupler, and the output surface of the first photocoupler is connected to the base of the first triode Electrically connected, the emitter of the first triode is electrically connected to the MCU.
具体的,所述第二反馈电路中的元器件包括第二二极管、第二光电耦合器和第二三极管,所述N极继电器的输入端与第第二二极管的正极电连接,所述第二二极管的负极通过第二光电耦合器的连接面与L极继电器的输出端电连接,所述第二光电耦合器的输出面与所述第一三极管的基极电连接,所述第一三极管的发射极与CPU电连接。Specifically, the components in the second feedback circuit include a second diode, a second photocoupler, and a second triode. The input terminal of the N-pole relay is electrically connected to the anode of the second diode. The cathode of the second diode is electrically connected to the output terminal of the L-pole relay through the connecting surface of the second photocoupler, and the output surface of the second photocoupler is connected to the base of the first triode. The electrode is electrically connected, and the emitter of the first triode is electrically connected to the CPU.
具体的,所述第一三极管的集电极设置偏置电路与基极相连,并同时接入外置电压,所述第一三极管的发射极接地,同时与MCU电连接。Specifically, the collector of the first triode is connected to the base with a bias circuit and is connected to an external voltage at the same time, and the emitter of the first triode is grounded and electrically connected to the MCU at the same time.
具体的,所述第二三极管的集电极设置偏置电路与基极相连,并同时接入外置电压,所述第二三极管的发射极接地,同时与MCU电连接。Specifically, the collector of the second triode is connected to the base with a bias circuit and is connected to an external voltage at the same time, and the emitter of the second triode is grounded and electrically connected to the MCU at the same time.
具体的,所述第一反馈电路和第二反馈电路还包含若干保护电阻。Specifically, the first feedback circuit and the second feedback circuit further include a number of protection resistors.
新能源汽车充电保护装置继电器通断检测方法,利用所述的新能源汽车充电保护装置继电器通断检测系统检测双继电器充电装置的通断。The new energy vehicle charging protection device relay on-off detection method uses the new energy vehicle charging protection device relay on-off detection system to detect the on-off detection of the dual-relay charging device.
有益效果Beneficial effect
本发明相比现有技术包括以下优点及有益效果:(1)本发明提供了能够针对L、N两根回路单独检测通断结果的方法。在控制板内部将每一路继电器设计成单继电器回路,通过光电耦合器和三极管检测该回路的通断。从而达到检测继电器通断是否良好的目的。Compared with the prior art, the present invention includes the following advantages and beneficial effects: (1) The present invention provides a method capable of separately detecting the on-off results of the two loops L and N. In the control board, each relay is designed as a single relay loop, and the on-off of the loop is detected through the photocoupler and the triode. So as to achieve the purpose of detecting whether the relay is on and off well.
(2)通过本发明,控制系统可以确切地知道继电器的通断是否良好,从而完善产品的自我检测能力,以及给用户提供最大的安全保障。本专利技术不仅适用于汽车充电保护装置,也可适用于电瓶车等等产品的充电保护装置,也可以适用于其他需要双继电器控制通电的保护装置。(2) Through the present invention, the control system can know exactly whether the relay is on and off properly, so as to improve the self-checking ability of the product and provide users with the greatest safety guarantee. This patented technology is not only suitable for automobile charging protection devices, but also for battery charging protection devices for products such as battery cars, and can also be applied to other protection devices that require dual relays to control energization.
附图说明Description of the drawings
图1为本发明的电路连接图。Figure 1 is a circuit connection diagram of the present invention.
本发明的实施方式Embodiments of the present invention
下面结合实施例及附图对本发明作进一步详细的描述,但本发明的实施方式不限于此。The present invention will be further described in detail below in conjunction with the examples and drawings, but the implementation of the present invention is not limited thereto.
在本发明的描述中,需要说明的是,除非另有明确的规定和限定,术语“设置有、连接”等,应做广义理解;术语“第一、第二”、仅用于描述目的,而不能理解为指示或暗示相对重要性。In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "provided with, connected", etc., should be understood in a broad sense; the terms "first, second" are only used for descriptive purposes, It cannot be understood as indicating or implying relative importance.
如图1所示,本发明的具体实施过程如下:本发明涉及电路检测技术领域的新能源汽车充电保护装置继电器通断检测系统,是基于设置有控制L极的L极继电器PL1和控制N极的N极继电器PL2的双继电器充电装置的电路通断检测系统。在两个继电器中,控制L极的L极继电器两端分别为输入端L_in和输出端L_out;控制N极的N极继电器两端分别为输入端N_in和输出端N_out,在L_in和N_out之间设计第一反馈电路,在N_in和L_out之间设计第二反馈电路,通过检测这两段回路的导通与截止,就可以判断两个继电器的通断。以达到系统自我检测继电器故障,增加用户的安全性。As shown in Figure 1, the specific implementation process of the present invention is as follows: The present invention relates to a new energy vehicle charging protection device relay on-off detection system in the technical field of circuit detection. It is based on an L pole relay PL1 with a control L pole and a control N pole. The N-pole relay PL2 is the circuit on-off detection system of the dual-relay charging device. In the two relays, the two ends of the L pole relay that controls the L pole are the input terminal L_in and the output terminal L_out; the two ends of the N pole relay that controls the N pole are the input terminal N_in and the output terminal N_out, between L_in and N_out Design the first feedback circuit, and design the second feedback circuit between N_in and L_out. By detecting the on and off of these two loops, the on and off of the two relays can be judged. In order to achieve the system self-detection of relay failures and increase the safety of users.
具体的,L_in和L_out设置于L极继电器开关的两端,N_in和N_out设置于N极继电器开关的两端。Specifically, L_in and L_out are set at both ends of the L-pole relay switch, and N_in and N_out are set at both ends of the N-pole relay switch.
第一反馈电路中的元器件包括第一二极管D1、第一光电耦合器U1和第一三极管Q1,L极继电器RL1的输入端L_in与第一二极管D1的正极电连接,第一二极管D1的负极通过第一光电耦合器U1的连接面与N极继电器RL2的输出端N_out电连接,第一光电耦合器U1的输出面与第一三极管Q1的基极电连接,第一三极管的发射极与MCU电连接。The components in the first feedback circuit include a first diode D1, a first photocoupler U1, and a first transistor Q1. The input terminal L_in of the L-pole relay RL1 is electrically connected to the anode of the first diode D1, The cathode of the first diode D1 is electrically connected to the output terminal N_out of the N-pole relay RL2 through the connection surface of the first photocoupler U1, and the output surface of the first photocoupler U1 is electrically connected to the base electrode of the first transistor Q1. Connected, the emitter of the first triode is electrically connected to the MCU.
具体的,在第一反馈电路中,L_in和N_out之间串联有保护电阻R1,第一三极管Q1设置偏置电路,在集电极上增设外部电压VDD,发射极与光电耦合器U1的输出端连接成接地回路,同时通过数据插口与MCU电连接。Specifically, in the first feedback circuit, a protection resistor R1 is connected in series between L_in and N_out, the first transistor Q1 is provided with a bias circuit, an external voltage VDD is added to the collector, and the emitter is connected to the output of the photocoupler U1. The terminal is connected into a ground loop, and at the same time, it is electrically connected with the MCU through the data socket.
第二反馈电路中的元器件包括第二二极管D2、第二光电耦合器U2和第二三极管Q2,N极继电器RL2的输入端N_in与第二二极管D2的正极电连接,第二二极管D2的负极通过第二光电耦合器U2的连接面与L极继电器RL1的输出端L_out电连接,第二光电耦合器U2的输出面与第二三极管Q2的基极电连接,第二三极管Q2的发射极与CPU电连接。The components in the second feedback circuit include a second diode D2, a second photocoupler U2, and a second transistor Q2. The input terminal N_in of the N-pole relay RL2 is electrically connected to the anode of the second diode D2, The cathode of the second diode D2 is electrically connected to the output terminal L_out of the L-pole relay RL1 through the connecting surface of the second photocoupler U2, and the output surface of the second photocoupler U2 is electrically connected to the base electrode of the second transistor Q2. Connected, the emitter of the second transistor Q2 is electrically connected to the CPU.
具体的,在第一反馈电路中,L_in和N_out之间串联有保护电阻R4,第二三极管Q2设置偏置电路,在集电极上增设外部电压VDD,发射极与光电耦合器U2的输出端连接成接地回路,同时通过数据插口与CPU电连接。Specifically, in the first feedback circuit, a protective resistor R4 is connected in series between L_in and N_out, the second transistor Q2 is provided with a bias circuit, an external voltage VDD is added to the collector, and the emitter is connected to the output of the photocoupler U2. The terminal is connected into a ground loop, and at the same time, it is electrically connected to the CPU through the data socket.
具体的,晶体三级管构成的放大器要做到不失真地将信号电压放大,就必须保证晶体管的发射结正偏、集电结反偏,即设置其工作点。通过外部电路的设置使晶体管的基极、发射极和集电极处于所要求的电位VDD,VDD的数值根据计算获得。Specifically, in order to amplify the signal voltage without distortion, the amplifier composed of transistors must ensure that the emitter junction of the transistor is forward biased and the collector junction is reverse biased, that is, set its operating point. The base, emitter and collector of the transistor are at the required potential VDD through the setting of the external circuit. The value of VDD is obtained by calculation.
其中,二极管最普遍的功能就是只允许电流由单一方向通过(称为顺向偏压)、电流反向时被阻断 (称为逆向偏压),因此,二极管可以理解为电子版的逆止阀。当L极继电器PL1和N极继电器PL2正常工作时,第一反馈电路和第二反馈电路同时通电,MCU或CPU 接收到电信号,反之则不能接收到电信号。Among them, the most common function of the diode is to only allow current to pass in a single direction (called forward bias), and the current is blocked when the current is reversed (called reverse bias). Therefore, the diode can be understood as an electronic version of backstop valve. When the L-pole relay PL1 and the N-pole relay PL2 work normally, the first feedback circuit and the second feedback circuit are energized at the same time, and the MCU or CPU receives the electrical signal, otherwise, it cannot receive the electrical signal.
三极管具有电流放大作用,其实质是三极管能以基极电流微小的变化量来控制集电极电流较大的变化量。这是三极管最基本的和最重要的特性。本发明中第一三极管Q1和第二三极管Q2选用PNP型晶体三极管,实现基极输入的微小电流的放大,由放射极将电信号传递给MCU或CPU。The triode has a current amplification effect, and its essence is that the triode can control the larger change of the collector current with a small change of the base current. This is the most basic and important characteristic of the triode. In the present invention, the first triode Q1 and the second triode Q2 select PNP type transistors to realize the amplification of the small current input by the base electrode, and the electric signal is transmitted to the MCU or CPU by the emitter electrode.
CPU是数据处理的单元,MCU中一般包含CPU,但除了数据处理单元外还有其他的外围的模块,如、RAM、ROM、定时计数器和多种I/O接口等,也就是说,MCU是集成了CPU和其他外围模块的微型控制单元。CPU is the unit of data processing. MCU generally contains CPU, but besides the data processing unit, there are other peripheral modules, such as RAM, ROM, timer counter and various I/O interfaces. That is to say, MCU is A micro control unit that integrates the CPU and other peripheral modules.
本发明的具体实施方式为:启动安装有本发明所设计检测电路的双继电器充电装置,当L极继电器和N极继电器都能正常工作时,第一反馈电路和第二反馈电路构成回路,第一二极管内有正向电流通过,第一光电耦合器中的发光二极管发光并转换为电信号传递给第一三极管,第一三极管的发射极将电信号反馈给MCU;同理第二二极管D2内有正向电流通过,第二光电耦合器U2中的发光二极管发光并转换为电信号传递给第二三极管Q2,第二三极管Q2的发射极将电信号反馈给CPU。即可得到设备正常运转的信息。The specific implementation of the present invention is to start the dual relay charging device equipped with the detection circuit designed by the present invention. When the L pole relay and the N pole relay can work normally, the first feedback circuit and the second feedback circuit form a loop. A forward current flows through a diode, the light-emitting diode in the first photocoupler emits light and converts it into an electric signal to be transmitted to the first triode, and the emitter of the first triode feeds the electric signal back to the MCU; If a forward current flows through the second diode D2, the light-emitting diode in the second photocoupler U2 emits light and converts it into an electrical signal and transmits it to the second transistor Q2. The emitter of the second transistor Q2 will be electrically connected. The signal is fed back to the CPU. You can get information about the normal operation of the equipment.
当L极继电器PL1、N极继电器PL2之中有一个、或者均不能正常工作时,第一反馈电路和第二反馈电路不能构成回路,存在故障的继电器输入端所连接的反馈电路中没有能通过二极管的正向电流,可得到设备没有正常运转的信息,以便使用者及时处理异常状况。When one of the L-pole relay PL1 and the N-pole relay PL2, or neither of them can work normally, the first feedback circuit and the second feedback circuit cannot form a loop, and the feedback circuit connected to the input terminal of the faulty relay fails to pass The forward current of the diode can get the information that the equipment is not operating normally, so that the user can deal with the abnormal situation in time.
以上所述实施例仅表达了本发明的实施方式,其描述较为具体和详细,但并不能因此而理解为对本发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。The above-mentioned embodiments only express the implementation of the present invention, and the description is more specific and detailed, but it should not be understood as a limitation to the patent scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (7)

  1. 新能源汽车充电保护装置继电器通断检测系统,其特征在于:包含L极继电器和N极继电器的双继电器充电装置,在所述L极继电器的输入端与N极继电器的输出端接入第一反馈电路,在所述L极继电器的输出端与N极继电器的输入端接入第二反馈电路。The new energy vehicle charging protection device relay on-off detection system is characterized in that: a dual-relay charging device including an L-pole relay and an N-pole relay is connected to the input terminal of the L-pole relay and the output terminal of the N-pole relay. The feedback circuit is connected to the second feedback circuit at the output end of the L pole relay and the input end of the N pole relay.
  2. 根据权利要求1所述的新能源汽车充电保护装置继电器通断检测系统,其特征在于:所述第一反馈电路中的元器件包括第一二极管、第一光电耦合器和第一三极管,所述L极继电器的输入端与第一二极管的正极电连接,所述第一二极管的负极通过第一光电耦合器的连接面与N极继电器的输出端电连接,所述第一光电耦合器的输出面与所述第一三极管的基极电连接,所述第一三极管的发射极与MCU电连接。The new energy vehicle charging protection device relay on-off detection system according to claim 1, wherein the components in the first feedback circuit include a first diode, a first photocoupler, and a first triode Tube, the input end of the L-pole relay is electrically connected to the anode of the first diode, and the cathode of the first diode is electrically connected to the output end of the N-pole relay through the connecting surface of the first photocoupler, so The output surface of the first photocoupler is electrically connected with the base of the first triode, and the emitter of the first triode is electrically connected with the MCU.
  3. 根据权利要求2所述的新能源汽车充电保护装置继电器通断检测系统,其特征在于:所述第二反馈电路中的元器件包括第二二极管、第二光电耦合器和第二三极管,所述N极继电器的输入端与第第二二极管的正极电连接,所述第二二极管的负极通过第二光电耦合器的连接面与L极继电器的输出端电连接,所述第二光电耦合器的输出面与所述第一三极管的基极电连接,所述第一三极管的发射极与CPU电连接。The new energy vehicle charging protection device relay on-off detection system according to claim 2, wherein the components in the second feedback circuit include a second diode, a second photocoupler and a second triode Tube, the input end of the N-pole relay is electrically connected to the anode of the second diode, and the cathode of the second diode is electrically connected to the output end of the L-pole relay through the connection surface of the second photocoupler, The output surface of the second photocoupler is electrically connected to the base of the first triode, and the emitter of the first triode is electrically connected to the CPU.
  4. 根据权利要求3所述的新能源汽车充电保护装置继电器通断检测系统,其特征在于:所述第一三极管的集电极设置偏置电路与基极相连,并同时接入外置电压,所述第一三极管的发射极接地,同时与MCU电连接。The new energy vehicle charging protection device relay on-off detection system according to claim 3, wherein the collector of the first triode is connected to the base with a bias circuit, and is connected to an external voltage at the same time, The emitter of the first triode is grounded and electrically connected to the MCU at the same time.
  5. 根据权利要求4所述的新能源汽车充电保护装置继电器通断检测系统,其特征在于:所述第二三极管的集电极设置偏置电路与基极相连,并同时接入外置电压,所述第二三极管的发射极接地,同时与MCU电连接。The new energy vehicle charging protection device relay on-off detection system according to claim 4, wherein the collector of the second triode is connected to the base with a bias circuit, and is connected to an external voltage at the same time, The emitter of the second triode is grounded and electrically connected to the MCU at the same time.
  6. 根据权利要求1所述的新能源汽车充电保护装置继电器通断检测系统,其特征在于:所述第一反馈电路和第二反馈电路还包含若干保护电阻。The new energy vehicle charging protection device relay on-off detection system according to claim 1, wherein the first feedback circuit and the second feedback circuit further comprise a plurality of protection resistors.
  7. 新能源汽车充电保护装置继电器通断检测方法,其特征在于:利用权利要求1-6所述的任意一种新能源汽车充电保护装置继电器通断检测系统检测双继电器充电装置的通断。The new energy vehicle charging protection device relay on-off detection method is characterized in that any one of the new energy vehicle charging protection device relay on-off detection systems described in claims 1-6 is used to detect the on-off detection of the dual-relay charging device.
PCT/CN2020/112792 2019-09-27 2020-09-01 New energy vehicle charging protection device relay on-off detection system and method WO2021057407A1 (en)

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CN110514998A (en) * 2019-09-27 2019-11-29 深圳市利成科技有限公司 New-energy automobile charge protection device relay on-off detection system and method

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