CN112706640B - A pre-charging system, method and module - Google Patents

A pre-charging system, method and module Download PDF

Info

Publication number
CN112706640B
CN112706640B CN202011507048.3A CN202011507048A CN112706640B CN 112706640 B CN112706640 B CN 112706640B CN 202011507048 A CN202011507048 A CN 202011507048A CN 112706640 B CN112706640 B CN 112706640B
Authority
CN
China
Prior art keywords
pole
throw relay
double
relay
charging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202011507048.3A
Other languages
Chinese (zh)
Other versions
CN112706640A (en
Inventor
季春波
杨政
周昌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guochuang Mobile Energy Innovation Center Jiangsu Co Ltd
Original Assignee
Guochuang Mobile Energy Innovation Center Jiangsu Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guochuang Mobile Energy Innovation Center Jiangsu Co Ltd filed Critical Guochuang Mobile Energy Innovation Center Jiangsu Co Ltd
Priority to CN202011507048.3A priority Critical patent/CN112706640B/en
Publication of CN112706640A publication Critical patent/CN112706640A/en
Application granted granted Critical
Publication of CN112706640B publication Critical patent/CN112706640B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

本发明涉及充电领域，具体公开了一种预充电系统，该预充电系统包括车端和主继电器，所述车端连接所述主继电器的输出端，该预充电系统还包括控制单元和预充电切换单元，其中，所述控制单元控制主继电器和预充电切换单元工作，所述预充电切换单元的输出端连接车端，闭合主继电器前，预充电切换单元预先对车端进行预充电，当车端电容电压值达到恒定值时，预充电切换单元停止工作，本实施例通过预充电切换单元对车端电容进行预充电，当车端电容电压值达到恒定值，则预充电切换单元停止工作，主继电器闭合，对电动汽车进行充电，此时，车端电容不会产生较大冲击电流，不会导致继电器粘连，从而可以延长继电器的使用时间。

The present invention relates to the field of charging, and specifically discloses a pre-charging system, which includes a vehicle end and a main relay, wherein the vehicle end is connected to the output end of the main relay, and the pre-charging system also includes a control unit and a pre-charging switching unit, wherein the control unit controls the operation of the main relay and the pre-charging switching unit, the output end of the pre-charging switching unit is connected to the vehicle end, and before closing the main relay, the pre-charging switching unit pre-charges the vehicle end in advance, and when the voltage value of the vehicle end capacitor reaches a constant value, the pre-charging switching unit stops working. In this embodiment, the vehicle end capacitor is pre-charged by the pre-charging switching unit, and when the voltage value of the vehicle end capacitor reaches a constant value, the pre-charging switching unit stops working, the main relay is closed, and the electric vehicle is charged. At this time, the vehicle end capacitor will not generate a large impact current, and will not cause the relay to stick, thereby extending the service life of the relay.

Description

Pre-charging system, method and module
Technical Field
The invention relates to the field of electric automobile charging, in particular to a pre-charging system, a pre-charging method and a pre-charging module.
Background
Along with the continuous development of new energy industry, fill electric pile construction progress and accelerate, the occupancy of alternating current charging pile on the market is higher and higher, and simultaneously accompanies the problem more and more, wherein there is relay adhesion problem, and direct closed main relay when alternating current charging pile charges, because the car end exists electric capacity, exists very big impulse current in the closing twinkling of an eye, makes the contact acceleration carbonization of relay, leads to relay adhesion, has shortened the life of relay greatly.
Disclosure of Invention
The invention provides a pre-charging system, which aims to solve the problems that in the prior art, when an alternating-current charging pile is charged, the relay is adhered due to direct closing of a main relay, and the service life of the relay is greatly shortened.
The invention adopts the technical scheme that:
a precharge system comprising a vehicle terminal and a main relay, the vehicle terminal being connected to an output terminal of the main relay, further comprising:
a control unit controlling the operation of the main relay and the precharge switching unit;
And the output end of the precharge switching unit is connected with the vehicle end, the precharge switching unit precharges the vehicle end in advance before the main relay is closed, and when the voltage value of the capacitor of the vehicle end reaches a constant value, the precharge switching unit stops working.
Further, the pre-charging system comprises an alternating voltage sampling unit, and the alternating voltage sampling unit is respectively connected with the pre-charging switching unit and the power supply end.
Further, the precharge switching unit comprises a single-blade double-placed relay K1, a double-blade single-placed relay K2 and a single-blade single-placed relay K3, wherein a third end of the single-blade double-placed relay K1 is connected with a power end, a fourth end of the single-blade double-placed relay K1 is connected with a fifth end of the double-blade single-placed relay K2, a sixth end of the double-blade single-placed relay K2 and a fourth end of the double-blade single-placed relay K2 are connected with a vehicle end, a third end of the double-blade single-placed relay K2 is connected with a fourth end of the single-blade single-placed relay K3, and a third end of the single-blade single-placed relay K3 is connected with a fifth end of the single-blade double-placed relay K1.
Further, the precharge switching unit further includes a rectifier bridge, the fourth end of the single-pole double-placed relay K1 is connected to the fifth end of the double-pole single-placed relay K2 through a diode D1 in the rectifier bridge, and the third end of the double-pole single-placed relay K2 is connected to the fourth end of the single-pole single-placed relay K3 through a diode D3 in the rectifier bridge.
Further, the pre-charging system further comprises a voltage transformer, and the third end of the single-pole double-relay K1 is connected with a power end through the voltage sensor.
Further, when the precharge switching unit does not work, the third end of the single-pole double-placed relay K1 is connected with the fifth end of the single-pole double-placed relay K1, the double-pole single-placed relay K2 and the single-pole single-placed relay K3 are disconnected, when the precharge switching unit works, the third end of the single-pole double-placed relay K1 is connected with the fourth end of the single-pole double-placed relay K1, and the double-pole single-placed relay K2 and the single-pole single-placed relay K3 are closed.
The invention provides a pre-charging method for solving the problems that in the prior art, when an alternating-current charging pile is charged, a main relay is directly closed to cause adhesion of the relay, and the service life of the relay is greatly shortened.
A method of pre-charging, comprising:
When a charging signal is obtained, a third end of the single-knife double-set relay K1 is controlled to be connected with a fifth end of the single-knife double-set relay K1, and the double-knife single-set relay K2 and the single-knife single-set relay K3 are closed;
Acquiring an alternating voltage sampling value;
when the voltage values of the two ends of the sampling resistor R1 are a constant value within the set range, judging whether the voltage values of the two ends of the sampling resistor R1 are within the set range or not;
acquiring a main loop alternating current voltage value;
judging whether the direction of the alternating voltage of the main loop is consistent with the voltage direction of the capacitor at the vehicle end;
if the voltage values of the two ends of the sampling resistor R1 are in the set range and the direction of the alternating voltage of the main loop is consistent with the voltage direction of the capacitor at the vehicle end, the third end of the single-knife double-placed relay K1 is controlled to disconnect the fifth end of the single-knife double-placed relay K1, and the double-knife single-placed relay K2 and the single-knife single-placed relay K3 are controlled to disconnect and allow the main relay to be closed.
Further, the calculation formula of the voltage value setting range at the two ends of the sampling resistor R1 is as follows:
Ub=(Ua*R1)/(R1+Rx),
wherein Ub is the calculated voltage value at two ends of the sampling resistor R1, ua is the voltage value of the power supply end, R1 is the sampling resistor, rx is the discharge resistor of the vehicle end, and Rx is 51KΩ -2 MΩ.
Further, if the voltage value of the two ends of the sampling resistor R1 is within the set range, the direction of the main circuit ac voltage is not consistent with the direction of the vehicle end capacitor voltage, and when the direction of the main circuit ac voltage is consistent with the direction of the vehicle end capacitor voltage, the main relay is closed.
The invention provides a pre-charging module, which aims to solve the problems that in the prior art, when an alternating-current charging pile is charged, the relay is adhered due to direct closing of a main relay, and the service life of the relay is greatly shortened.
A precharge module comprising:
The acquisition unit is used for acquiring a charging signal and an alternating current voltage sampling value;
the judging unit is used for judging whether the voltage values of the two ends of the sampling resistor R1 are within a set range or not and judging whether the direction of the alternating current voltage of the main loop is consistent with the direction of the voltage of the capacitor at the vehicle end or not when the voltage values of the two ends of the sampling resistor R1 are within the set range;
The control unit controls the third end of the single-blade double-placed relay K1 to be connected with the fifth end of the single-blade double-placed relay K1 when a charging signal is obtained, the double-blade single-placed relay K2 and the single-blade single-placed relay K3 are closed, and controls the third end of the single-blade double-placed relay K1 to disconnect the fifth end of the single-blade double-placed relay K1 and the double-blade single-placed relay K2 and the single-blade single-placed relay K3 to be disconnected and allow the main relay to be closed when the voltage value of the two ends of the sampling resistor R1 is in a set range and the alternating voltage direction of the main loop is consistent with the voltage direction of the capacitor at the vehicle end.
Compared with the prior art, the invention has the beneficial effects that:
the precharge system provided by the invention comprises a control unit and a precharge switching unit, wherein the control unit controls the main relay and the precharge switching unit to work, the precharge switching unit is used for precharging the vehicle-end capacitor before the main relay is closed, when the voltage value of the vehicle-end capacitor reaches a constant value, the precharge switching unit stops working, and then the main relay is closed to charge the vehicle-end.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a precharge system according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a precharge switching unit according to an embodiment of the present invention;
fig. 3 is a flowchart of a precharge method according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Fig. 1 shows a schematic block diagram of a precharge system provided by an embodiment of the present invention, where the precharge system includes a vehicle end and a main relay, the vehicle end is connected to an output end of the main relay, and the precharge system further includes a control unit and a precharge switching unit, where the control unit controls the main relay and the precharge switching unit to operate, the output end of the precharge switching unit is connected to the vehicle end, the precharge switching unit precharges the vehicle end in advance before closing the main relay, when a voltage value of a capacitor of the vehicle end reaches a constant value, the precharge switching unit performs precharge on the capacitor of the vehicle end, when the voltage value of the capacitor of the vehicle end reaches the constant value, the precharge switching unit stops operating, the main relay is closed, charges an electric vehicle, and at this time, the capacitor of the vehicle end does not generate a large impact current, and does not cause adhesion of the relay, thereby prolonging a service time of the relay.
It should be noted that, in this embodiment, the constant value is not a constant value, and for electric vehicles of an unable type, the voltage values of the vehicle end capacitor are different, and the fact that the voltage value of the vehicle end capacitor reaches the constant value refers to the voltage values of the two ends of the capacitor of a certain vehicle type after the charging is completed.
Further, the precharge system includes an ac voltage sampling unit, where the ac voltage collecting unit is connected to the precharge switching unit and the power supply terminal, and the embodiment collects the capacitance voltage value of the vehicle terminal and the voltage value of the power supply terminal through the ac voltage collecting unit, and transmits the collected voltage value to the control unit.
Further, as shown in fig. 2, the precharge switching unit includes a single-pole double-pole relay K1, a rectifier bridge, a double-pole single-pole relay K2, and a single-pole relay K3, wherein the third end of the single-pole double-pole relay K1 is connected to a power supply end, the fourth end of the single-pole double-pole relay K1 is connected to an anode of a diode D1 in the rectifier bridge, the fifth end of the single-pole double-pole relay K1 is connected to the third end of the single-pole relay K3, the fourth end of the single-pole relay K3 is connected to a cathode of a diode D3 in the rectifier bridge, the cathode of the diode D1 in the rectifier bridge is connected to the fifth end of the double-pole single-pole relay K2, the sixth end of the double-pole single-pole relay K2 and the fourth end of the double-pole single-relay K2 are connected to a vehicle end, and the anode of the diode D3 in the rectifier bridge is connected to the third end of the double-pole single-pole relay K2.
Specifically, as shown in fig. 2, when charging is required, the control unit drives the third end of the single-pole double-placed relay K1 to be connected with the fourth end, the double-pole single-placed relay K2 and the single-pole single-placed relay K3 are closed, at this time, alternating current is output to the vehicle end through the voltage sensor after passing through the rectifier bridge, and the capacitor of the vehicle end is precharged;
When the precharge is finished, the control unit drives the third end of the single-blade double-set relay K1 to be connected with the fifth end, the double-blade single-set relay K2 and the single-blade single-set relay K3 are disconnected, and the power end does not precharge the vehicle end any more.
Further, the pre-charging system further comprises a voltage transformer, the third end of the single-pole double-relay K1 is connected with a power end through the voltage sensor, and the alternating voltage is converted into low voltage through the voltage transformer, so that the vehicle-end capacitor can be conveniently charged.
The present embodiment also provides a precharge method, to which the above precharge system is applied, specifically, the precharge method includes:
When a charging signal is obtained, a third end of the single-knife double-set relay K1 is controlled to be connected with a fifth end of the single-knife double-set relay K1, and the double-knife single-set relay K2 and the single-knife single-set relay K3 are closed;
obtaining voltage values of two ends of a sampling resistor R1;
When the voltage values of the two ends of the sampling resistor R1 are a constant value within a set range, judging whether the voltage values of the two ends of the sampling resistor R1 are within the set range or not;
acquiring a main loop alternating current voltage value;
judging whether the direction of the alternating voltage of the main loop is consistent with the voltage direction of the capacitor at the vehicle end;
if the voltage values of the two ends of the sampling resistor R1 are in the set range and the direction of the alternating voltage of the main loop is consistent with the voltage direction of the capacitor at the vehicle end, the third end of the single-knife double-placed relay K1 is controlled to disconnect the fifth end of the single-knife double-placed relay K1, and the double-knife single-placed relay K2 and the single-knife single-placed relay K3 are controlled to disconnect and allow the main relay to be closed.
Further, the calculation formula of the voltage value setting range at the two ends of the sampling resistor R1 is as follows:
Ub=(Ua*R1)/(R1+Rx),
wherein Ub is the calculated voltage value at two ends of the sampling resistor R1, ua is the voltage value of the power supply end, R1 is the sampling resistor, rx is the discharge resistor of the vehicle end, and Rx is 51KΩ -2 MΩ.
It should be noted that, the resistances of the discharge resistors Rx at the vehicle ends of different types of vehicles are different, so after the discharge resistors at the vehicle ends of a plurality of electric vehicles on the market are collected in this embodiment, the value range of Rx is 51kΩ -2 mΩ, and therefore, the reasonable range of the voltage values at the two ends of the sampling resistor R1 can be obtained by substituting the value range of the discharge resistor Rx at the vehicle end according to the above calculation formula.
Further, if the voltage value of the two ends of the sampling resistor R1 is within the set range, the direction of the main circuit ac voltage is not consistent with the direction of the vehicle end capacitor voltage, and when the direction of the main circuit ac voltage is consistent with the direction of the vehicle end capacitor voltage, the main relay is closed.
The present embodiment also provides a precharge module, to which the above precharge system is applied, specifically, the precharge module includes:
The acquisition unit is used for acquiring a charging signal and an alternating current voltage sampling value;
The judging unit is used for judging whether the voltage values of the two ends of the sampling resistor R1 are in a set range or not and judging whether the direction of the alternating current voltage of the main loop is consistent with the direction of the voltage of the capacitor at the vehicle end or not when the voltage values of the two ends of the sampling resistor R1 are in a constant value in the set range;
The control unit controls the third end of the single-blade double-placed relay K1 to be connected with the fifth end of the single-blade double-placed relay K1 when a charging signal is obtained, the double-blade single-placed relay K2 and the single-blade single-placed relay K3 are closed, and controls the third end of the single-blade double-placed relay K1 to disconnect the fifth end of the single-blade double-placed relay K1 and the double-blade single-placed relay K2 and the single-blade single-placed relay K3 to be disconnected and allow the main relay to be closed when the voltage value of the two ends of the sampling resistor R1 is in a set range and the alternating voltage direction of the main loop is consistent with the voltage direction of the capacitor at the vehicle end.
In summary, the precharge system provided in this embodiment precharges the vehicle-end capacitor through the precharge switching unit before closing the main relay, and when the voltage value of the vehicle-end capacitor reaches a constant value, the precharge switching unit stops working, and then the main relay is closed to charge the vehicle-end, the invention solves the problem of directly closing the main relay, because the vehicle-end capacitor exists, the contact of the relay is accelerated to carbonize by the impulse current at the closing moment, which leads to the problem of adhesion of the relay, the invention can prolong the service life of the main relay, in addition, the invention has small space and low cost, only needs to add 3 small relays and one rectifier bridge, and can be welded on the circuit board, thereby greatly saving the space of the charging pile.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
Those of ordinary skill in the art will appreciate that all or part of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, where the program when executed includes one or a combination of the steps of the method embodiments.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the design of the present invention.

Claims (10)

1.一种预充电方法，其特征在于，应用预充电系统，所述预充电系统包括预充电切换单元，所述预充电切换单元包括单刀双掷继电器K1、整流桥、双刀单掷继电器K2和单刀单掷继电器K3，所述单刀双掷继电器K1的第三端连接电源端，所述单刀双掷继电器K1的第四端连接整流桥中的二极管D1的阳极，所述单刀双掷继电器K1的第五端连接所述单刀单掷继电器K3的第三端，所述单刀单掷继电器K3的第四端连接所述整流桥中的二极管D3的阴极，所述整流桥中的二极管D1的阴极连接所述双刀单掷继电器K2的第五端，所述双刀单掷继电器K2的第六端和所述双刀单掷继电器K2的第四端连接车端，所述整流桥中的二极管D3的阳极连接所述双刀单掷继电器K2的第三端，所述预充电方法包括：1. A pre-charging method, characterized in that a pre-charging system is applied, the pre-charging system includes a pre-charging switching unit, the pre-charging switching unit includes a single-pole double-throw relay K1, a rectifier bridge, a double-pole single-throw relay K2 and a single-pole single-throw relay K3, the third end of the single-pole double-throw relay K1 is connected to the power supply end, the fourth end of the single-pole double-throw relay K1 is connected to the anode of the diode D1 in the rectifier bridge, the fifth end of the single-pole double-throw relay K1 is connected to the third end of the single-pole single-throw relay K3, the fourth end of the single-pole single-throw relay K3 is connected to the cathode of the diode D3 in the rectifier bridge, the cathode of the diode D1 in the rectifier bridge is connected to the fifth end of the double-pole single-throw relay K2, the sixth end of the double-pole single-throw relay K2 and the fourth end of the double-pole single-throw relay K2 are connected to the vehicle end, the anode of the diode D3 in the rectifier bridge is connected to the third end of the double-pole single-throw relay K2, and the pre-charging method includes: 获取到充电信号，则控制单刀双掷继电器K1的第三端连接单刀双掷继电器K1的第五端，双刀单掷继电器K2和单刀单掷继电器K3闭合；When a charging signal is obtained, the third terminal of the single-pole double-throw relay K1 is controlled to be connected to the fifth terminal of the single-pole double-throw relay K1, and the double-pole single-throw relay K2 and the single-pole single-throw relay K3 are closed; 获取采样电阻R1两端的电压值；Get the voltage value across the sampling resistor R1; 当采样电阻R1两端的电压值为一个恒定值，则判断采样电阻R1两端的电压值是否在设定范围内；When the voltage value across the sampling resistor R1 is a constant value, it is determined whether the voltage value across the sampling resistor R1 is within a set range; 获取主回路交流电压值；Get the AC voltage value of the main circuit; 判断主回路交流电压的方向与车端电容电压方向是否一致；Determine whether the direction of the main circuit AC voltage is consistent with the direction of the vehicle-end capacitor voltage; 若采样电阻R1的两端电压值在设定范围内且主回路交流电压的方向与车端电容电压方向一致，则控制单刀双掷继电器K1的第三端断开单刀双掷继电器K1的第五端，双刀单掷继电器K2和单刀单掷继电器K3断开且允许主继电器闭合。If the voltage value across the sampling resistor R1 is within the set range and the direction of the main circuit AC voltage is consistent with the direction of the vehicle-end capacitor voltage, the third terminal of the single-pole double-throw relay K1 is controlled to disconnect the fifth terminal of the single-pole double-throw relay K1, the double-pole single-throw relay K2 and the single-pole single-throw relay K3 are disconnected and the main relay is allowed to close. 2.根据权利要求1所述的一种预充电方法，其特征在于，所述预充电系统包括车端和主继电器，所述车端连接所述主继电器的输出端，还包括：2. A pre-charging method according to claim 1, characterized in that the pre-charging system comprises a vehicle end and a main relay, the vehicle end is connected to the output end of the main relay, and further comprises: 控制单元，所述控制单元控制主继电器和预充电切换单元工作；A control unit, wherein the control unit controls the operation of the main relay and the pre-charging switching unit; 预充电切换单元，所述预充电切换单元的输出端连接车端，闭合主继电器前，预充电切换单元预先对车端进行预充电，当车端电容电压值达到恒定值时，预充电切换单元停止工作。A pre-charging switching unit, wherein the output end of the pre-charging switching unit is connected to the vehicle end. Before closing the main relay, the pre-charging switching unit pre-charges the vehicle end. When the voltage value of the vehicle end capacitor reaches a constant value, the pre-charging switching unit stops working. 3.根据权利要求1所述的一种预充电方法，其特征在于，所述预充电系统包括交流电压采样单元，所述交流电压采集单元分别连接预充电切换单元和电源端。3. A pre-charging method according to claim 1, characterized in that the pre-charging system comprises an AC voltage sampling unit, and the AC voltage sampling unit is connected to a pre-charging switching unit and a power supply end respectively. 4.根据权利要求1所述的一种预充电方法，其特征在于，所述单刀双掷继电器K1的第三端连接电源端，所述单刀双掷继电器K1的第四端连接双刀单掷继电器K2的第五端，所述双刀单掷继电器K2的第六端和所述双刀单掷继电器K2的第四端连接车端，所述双刀单掷继电器K2的第三端连接所述单刀单掷继电器K3的第四端，所述单刀单掷继电器K3的第三端连接所述单刀双掷继电器K1的第五端。4. A pre-charging method according to claim 1, characterized in that the third end of the single-pole double-throw relay K1 is connected to the power supply end, the fourth end of the single-pole double-throw relay K1 is connected to the fifth end of the double-pole single-throw relay K2, the sixth end of the double-pole single-throw relay K2 and the fourth end of the double-pole single-throw relay K2 are connected to the vehicle end, the third end of the double-pole single-throw relay K2 is connected to the fourth end of the single-pole single-throw relay K3, and the third end of the single-pole single-throw relay K3 is connected to the fifth end of the single-pole double-throw relay K1. 5.根据权利要求1所述的一种预充电方法，其特征在于，所述预充电切换单元还包括整流桥，所述单刀双掷继电器K1的第四端经整流桥中的二极管D1连接双刀单掷继电器K2的第五端，所述双刀单掷继电器K2的第三端经整流桥中的二极管D3连接所述单刀单掷继电器K3的第四端。5. A pre-charging method according to claim 1, characterized in that the pre-charging switching unit also includes a rectifier bridge, the fourth end of the single-pole double-throw relay K1 is connected to the fifth end of the double-pole single-throw relay K2 through the diode D1 in the rectifier bridge, and the third end of the double-pole single-throw relay K2 is connected to the fourth end of the single-pole single-throw relay K3 through the diode D3 in the rectifier bridge. 6.根据权利要求1所述的一种预充电方法，其特征在于，所述预充电系统还包括电压互感器，所述单刀双掷继电器K1的第三端经所述电压互感器连接电源端。6. A precharging method according to claim 1, characterized in that the precharging system also includes a voltage transformer, and the third end of the single-pole double-throw relay K1 is connected to the power supply end via the voltage transformer. 7.根据权利要求1所述的一种预充电方法，其特征在于，当预充电切换单元不工作时，所述单刀双掷继电器K1的第三端和所述单刀双掷继电器K1的第五端连接，所述双刀单掷继电器K2和所述单刀单掷继电器K3断开；当所述预充电切换单元工作时，所述单刀双掷继电器K1的第三端连接所述单刀双掷继电器K1的第五端，所述双刀单掷继电器K2和所述单刀单掷继电器K3闭合。7. A pre-charging method according to claim 1, characterized in that, when the pre-charging switching unit is not working, the third end of the single-pole double-throw relay K1 is connected to the fifth end of the single-pole double-throw relay K1, and the double-pole single-throw relay K2 and the single-pole single-throw relay K3 are disconnected; when the pre-charging switching unit is working, the third end of the single-pole double-throw relay K1 is connected to the fifth end of the single-pole double-throw relay K1, and the double-pole single-throw relay K2 and the single-pole single-throw relay K3 are closed. 8.根据权利要求1所述的一种预充电方法，其特征在于，采样电阻R1两端的电压值设定范围计算公式为：8. A pre-charging method according to claim 1, characterized in that the voltage value setting range calculation formula across the sampling resistor R1 is: Ub＝(Ua*R1)/(R1+Rx)，Ub＝(Ua*R1)/(R1+Rx), 其中，Ub是采样电阻R1两端的计算电压值，Ua是电源端电压值，R1是采样电阻，Rx是车端的放电电阻，Rx的取值范围为51KΩ～2MΩ。Among them, Ub is the calculated voltage value across the sampling resistor R1, Ua is the voltage value at the power supply end, R1 is the sampling resistor, Rx is the discharge resistor at the vehicle end, and the value range of Rx is 51KΩ～2MΩ. 9.根据权利要求1所述的一种预充电方法，其特征在于，若采样电阻R1的两端电压值在设定范围内，主回路交流电压的方向与车端电容电压方向不一致，则等到主回路交流电压的方向与车端电容电压方向一致时，闭合主继电器。9. A pre-charging method according to claim 1, characterized in that, if the voltage value across the sampling resistor R1 is within a set range, and the direction of the main circuit AC voltage is inconsistent with the direction of the vehicle-end capacitor voltage, then the main relay is closed when the direction of the main circuit AC voltage is consistent with the direction of the vehicle-end capacitor voltage. 10.一种预充电模块，其特征在于，应用预充电系统，所述预充电系统包括预充电切换单元，所述预充电切换单元包括单刀双掷继电器K1、整流桥、双刀单掷继电器K2和单刀单掷继电器K3，所述单刀双掷继电器K1的第三端连接电源端，所述单刀双掷继电器K1的第四端连接整流桥中的二极管D1的阳极，所述单刀双掷继电器K1的第五端连接所述单刀单掷继电器K3的第三端，所述单刀单掷继电器K3的第四端连接所述整流桥中的二极管D3的阴极，所述整流桥中的二极管D1的阴极连接所述双刀单掷继电器K2的第五端，所述双刀单掷继电器K2的第六端和所述双刀单掷继电器K2的第四端连接车端，所述整流桥中的二极管D3的阳极连接所述双刀单掷继电器K2的第三端，所述预充电模块包括：10. A pre-charging module, characterized in that a pre-charging system is applied, the pre-charging system includes a pre-charging switching unit, the pre-charging switching unit includes a single-pole double-throw relay K1, a rectifier bridge, a double-pole single-throw relay K2 and a single-pole single-throw relay K3, the third end of the single-pole double-throw relay K1 is connected to the power supply end, the fourth end of the single-pole double-throw relay K1 is connected to the anode of the diode D1 in the rectifier bridge, the fifth end of the single-pole double-throw relay K1 is connected to the third end of the single-pole single-throw relay K3, the fourth end of the single-pole single-throw relay K3 is connected to the cathode of the diode D3 in the rectifier bridge, the cathode of the diode D1 in the rectifier bridge is connected to the fifth end of the double-pole single-throw relay K2, the sixth end of the double-pole single-throw relay K2 and the fourth end of the double-pole single-throw relay K2 are connected to the vehicle end, the anode of the diode D3 in the rectifier bridge is connected to the third end of the double-pole single-throw relay K2, and the pre-charging module includes: 获取单元，所述获取单元用于获取充电信号及交流电压采样值；An acquisition unit, the acquisition unit is used to acquire a charging signal and an AC voltage sampling value; 判断单元，当采样电阻R1的两端电压值为一个恒定值，判断采样电阻R1的两端电压值是否在设定范围内，判断主回路交流电压的方向与车端电容电压方向是否一致；A judgment unit, when the voltage value at both ends of the sampling resistor R1 is a constant value, judges whether the voltage value at both ends of the sampling resistor R1 is within a set range, and judges whether the direction of the main circuit AC voltage is consistent with the direction of the vehicle-end capacitor voltage; 控制单元，当获取到充电信号，则控制单刀双掷继电器K1的第三端连接单刀双掷继电器K1的第五端，双刀单掷继电器K2和单刀单掷继电器K3闭合；当采样电阻R1的两端电压值在设定范围内且主回路交流电压的方向与车端电容电压方向一致，则控制单刀双掷继电器K1的第三端断开单刀双掷继电器K1的第五端，双刀单掷继电器K2和单刀单掷继电器K3断开且允许主继电器闭合。The control unit, when obtaining the charging signal, controls the third end of the single-pole double-throw relay K1 to connect to the fifth end of the single-pole double-throw relay K1, and the double-pole single-throw relay K2 and the single-pole single-throw relay K3 are closed; when the voltage value at both ends of the sampling resistor R1 is within the set range and the direction of the main circuit AC voltage is consistent with the direction of the vehicle-end capacitor voltage, the third end of the single-pole double-throw relay K1 is controlled to disconnect the fifth end of the single-pole double-throw relay K1, the double-pole single-throw relay K2 and the single-pole single-throw relay K3 are disconnected and the main relay is allowed to close.
CN202011507048.3A 2020-12-18 2020-12-18 A pre-charging system, method and module Active CN112706640B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011507048.3A CN112706640B (en) 2020-12-18 2020-12-18 A pre-charging system, method and module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011507048.3A CN112706640B (en) 2020-12-18 2020-12-18 A pre-charging system, method and module

Publications (2)

Publication Number Publication Date
CN112706640A CN112706640A (en) 2021-04-27
CN112706640B true CN112706640B (en) 2025-05-06

Family

ID=75544991

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011507048.3A Active CN112706640B (en) 2020-12-18 2020-12-18 A pre-charging system, method and module

Country Status (1)

Country Link
CN (1) CN112706640B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208714975U (en) * 2018-09-07 2019-04-09 珠海银隆电器有限公司 Electric vehicle precharge control circuit
CN216545809U (en) * 2020-12-18 2022-05-17 国创移动能源创新中心(江苏)有限公司 Pre-charging system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8723474B2 (en) * 2010-12-14 2014-05-13 Industrial Technology Research Institute Electrical vehicle energy system and operating method thereof
CN204556787U (en) * 2015-03-13 2015-08-12 北汽福田汽车股份有限公司 A kind of relay status monitoring device and there is its battery management system
CN211075606U (en) * 2019-09-25 2020-07-24 湖南强军科技有限公司 Electric automobile pre-charging system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208714975U (en) * 2018-09-07 2019-04-09 珠海银隆电器有限公司 Electric vehicle precharge control circuit
CN216545809U (en) * 2020-12-18 2022-05-17 国创移动能源创新中心(江苏)有限公司 Pre-charging system

Also Published As

Publication number Publication date
CN112706640A (en) 2021-04-27

Similar Documents

Publication Publication Date Title
CN105584520B (en) The steering power system and its control method of electric vehicle
CN108790895B (en) Structure of alternating-current charging pile based on relay zero-point opening control and control method
CN105416069B (en) A kind of power supply for electric car
CN110682828A (en) Control method and control system for parallel dual battery packs
CN100386944C (en) An on-board charging device for a fuel cell vehicle supercapacitor
CN113561847A (en) Lithium battery system and working method
CN207747773U (en) Accumulator of electric car power shortage self-charging system and electric vehicle
CN107634553A (en) Non-isolated bidirectional DC-DC converter pre-charge circuit and its method
CN112158106A (en) Charging control circuit of electric automobile with double battery systems and control method thereof
CN203368012U (en) DC contactor combined circuit for electric automobile
CN114236400B (en) Power battery detection method and system and vehicle
CN110535208A (en) The major loop control circuit of energy storage device
CN211348540U (en) Automatic test circuit of power battery system pre-charging loop
CN210327065U (en) Electric automobile discharge circuit
JP2014193060A (en) Power supply unit
CN108152750A (en) The battery charging and discharging parameter identification method and system of a kind of electric vehicle
CN112706640B (en) A pre-charging system, method and module
CN111572365A (en) A kind of hierarchical precharge loop control circuit and control method
CN216545809U (en) Pre-charging system
CN208125885U (en) The fault detection means of battery system
CN112026522B (en) Power supply circuit with automatic precharge function
CN111645546B (en) Charger and method for controlling charger
CN104648165B (en) A kind of automotive braking energy recovering device and its Discrete control method
JP2008219973A (en) Power unit for vehicle
CN214355544U (en) Pre-charging and active discharging control circuit of electric automobile

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Country or region after: China

Address after: Room 354, No. 18, Xinya Road, Wujin high tech Industrial Development Zone, Changzhou City, Jiangsu Province

Applicant after: Guochuang mobile energy innovation center (Jiangsu) Co.,Ltd.

Address before: Room 354, No. 18, Xinya Road, Wujin high tech Industrial Development Zone, Changzhou City, Jiangsu Province

Applicant before: National innovation energy automobile intelligent energy equipment innovation center (Jiangsu) Co.,Ltd.

Country or region before: China

GR01 Patent grant
GR01 Patent grant