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CN120816929A - On-vehicle discharge system, vehicle, vehicle discharge control method, device and medium - Google Patents

On-vehicle discharge system, vehicle, vehicle discharge control method, device and medium

Info

Publication number
CN120816929A
CN120816929A CN202511171118.5A CN202511171118A CN120816929A CN 120816929 A CN120816929 A CN 120816929A CN 202511171118 A CN202511171118 A CN 202511171118A CN 120816929 A CN120816929 A CN 120816929A
Authority
CN
China
Prior art keywords
switching device
discharge
vehicle
switching
discharging
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.)
Pending
Application number
CN202511171118.5A
Other languages
Chinese (zh)
Inventor
李易燃
闫亚江
郭银飞
林俐
周海波
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.)
Weilai Automobile Technology Anhui Co Ltd
Original Assignee
Weilai Automobile Technology Anhui 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 Weilai Automobile Technology Anhui Co Ltd filed Critical Weilai Automobile Technology Anhui Co Ltd
Priority to CN202511171118.5A priority Critical patent/CN120816929A/en
Publication of CN120816929A publication Critical patent/CN120816929A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/22Constructional details or arrangements of charging converters specially adapted for charging electric vehicles

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

Abstract

本申请涉及车辆技术领域,具体提供一种车载放电系统、车辆、车辆放电控制方法、设备及介质,旨在解决如何在双向车载充电机不停机的前提下启动或切换负载,延长开关器件寿命的问题。本申请提供的系统包括控制器和多个放电支路,放电支路的第一端与双向车载充电机的交流端口连接,第二端形成放电端口;放电支路中的开关器件用于导通或断开第一、第二端之间的电连接;控制器被配置成响应于对放电支路进行第一状态切换,在放电支路中的交流电流小于目标值时控制开关器件断开该电连接;响应于对放电支路进行第二状态切换,控制开关器件逐步导通该电连接。基于该系统,在负载启动或切换时不会产生冲击电流,不需要充电机停机,能够延长开关器件的寿命。

The present application relates to the field of vehicle technology, and specifically provides an on-board discharge system, a vehicle, a vehicle discharge control method, a device, and a medium, aiming to solve the problem of how to start or switch loads without shutting down a bidirectional on-board charger and extend the life of switching devices. The system provided in the present application includes a controller and multiple discharge branches, wherein the first end of the discharge branch is connected to the AC port of the bidirectional on-board charger, and the second end forms a discharge port; the switching device in the discharge branch is used to conduct or disconnect the electrical connection between the first and second ends; the controller is configured to control the switching device to disconnect the electrical connection when the AC current in the discharge branch is less than a target value in response to switching the discharge branch to a first state; and to control the switching device to gradually conduct the electrical connection in response to switching the discharge branch to a second state. Based on this system, no inrush current is generated when the load is started or switched, the charger does not need to be shut down, and the life of the switching device can be extended.

Description

Vehicle-mounted discharge system, vehicle discharge control method, device and medium
Technical Field
The application relates to the technical field of vehicles, in particular to a vehicle-mounted discharge system, a vehicle discharge control method, vehicle discharge control equipment and a vehicle discharge control medium.
Background
At present, an electric vehicle (a vehicle using at least a power battery as a power source) is usually provided with a bidirectional vehicle-mounted Charger (OBC), and the bidirectional vehicle-mounted Charger can be used for charging the power battery of the electric vehicle by using an external power supply and can be used as a mobile power supply device for supplying power to loads inside and outside the vehicle.
The bidirectional vehicle-mounted charger can be connected with multiple paths of loads, a relay is arranged between the bidirectional vehicle-mounted charger and each path of load, and a power supply loop can be controlled between the bidirectional vehicle-mounted charger and different loads by performing on/off control on the relay. The load may generate impact current when started, and the contacts of the relay cannot bear the impact current for a long time, and if the load is started frequently, the service life of the relay is affected. In order to avoid damage to the relay caused by impact current, the bidirectional vehicle-mounted charger is controlled to stop before the load is started, then the relay in the circuit where the load to be started is positioned is controlled to be closed, and then the bidirectional vehicle-mounted charger is controlled to start in a soft start mode, and the load is started after the operations are completed. Because the bidirectional vehicle-mounted charging machine is stopped and restarted, a certain time is delayed, and the response speed of load power supply is reduced. In addition, if other loads are being powered by the bi-directional on-board charger prior to shutdown, these loads may also be forced to power down due to the shutdown of the bi-directional on-board charger.
Accordingly, there is a need in the art for a new solution to the above-mentioned problems.
Disclosure of Invention
The application is provided for overcoming the defects, so as to solve or at least partially solve the technical problems of starting or switching the load on the premise that the bidirectional vehicle-mounted charger is not stopped, and prolonging the service life of a switching device in a power supply loop formed between the bidirectional vehicle-mounted charger and the load.
In a first aspect, a vehicle-mounted discharging system is provided, including a controller and a plurality of discharging branches, wherein a first end of each discharging branch is connected with an alternating current port of a bidirectional vehicle-mounted charger, and a second end of each discharging branch forms a discharging port of each discharging branch, and each discharging port is used for connecting a load;
the discharging branch comprises a switching device connected in series between the first end and the second end, and the switching device is used for conducting or disconnecting the electric connection between the first end and the second end;
The controller is configured to:
Detecting alternating current in the discharge branch in response to first state switching of the discharge branch, and controlling the switching device to disconnect the electrical connection when the alternating current is smaller than a target value, wherein the first state switching is changed from a discharge state to a power-off state;
And in response to the second state switching of the discharging branch, controlling the switching device to gradually conduct the electric connection, wherein the second state switching is switched from a power-off state to a discharging state.
In one aspect of the above vehicle-mounted discharging system, the controlling the switching device to disconnect the electrical connection when the ac current is less than a target value includes:
And controlling the switching device to break the electrical connection when the alternating current is zero.
In one technical scheme of the vehicle-mounted discharging system, the switching device is a switching tube, and the controlling the switching device to gradually conduct the electrical connection includes:
and controlling the on duty ratio of the switching tube to gradually rise from 0% to 100%.
In one technical scheme of the vehicle-mounted discharging system, the first end and the second end both comprise a live wire terminal and a zero wire terminal;
the switching device is connected in series between the live wire terminals of the first end and the second end;
Or two switching devices, one switching device is connected in series between the live wire terminal of the first end and the live wire terminal of the second end, and the other switching device is connected in series between the zero wire terminal of the first end and the zero wire terminal of the second end.
In one aspect of the above vehicle-mounted discharge system, the discharge branch further includes:
And a current sensor connected in series between the switching device and the second end, wherein the current sensor is used for detecting alternating current in the discharge branch.
In one technical scheme of the vehicle-mounted discharging system, the second ends comprise a live wire terminal and a zero wire terminal;
the current sensor is connected in series between the switching device and the live wire terminal;
Or two current sensors, one of which is connected in series between the switching device and the live terminal and the other of which is connected in series between the switching device and the neutral terminal, and the controller is further configured to disconnect the electrical connection of the switching device when both of the current sensors detect that the alternating current is zero.
In one technical scheme of the vehicle-mounted discharging system, the discharging branch further comprises an isolation sampling circuit, and the isolation sampling circuit is respectively connected with the current sensor and the controller;
the controller is further configured to acquire the alternating current detected by the current sensor through the isolated sampling circuit.
In one technical scheme of the vehicle-mounted discharging system, the discharging branch further comprises an isolation driving circuit, and the isolation driving circuit is respectively connected with the switching device and the controller;
The controller is further configured to control the switching device to open or gradually turn on the electrical connection through the isolation driving circuit.
In one aspect of the above vehicle-mounted discharge system, the controller is further configured to:
if the discharge branch is detected to have current abnormality, the switching device is controlled to disconnect the electrical connection;
wherein the current anomaly includes at least leakage, overcurrent and short circuit.
In one technical scheme of the vehicle-mounted discharging system, the switching tube is a MOS tube.
In a second aspect, a vehicle is provided, which includes a bidirectional vehicle-mounted charger and the vehicle-mounted discharging system according to any one of the aspects provided in the first aspect.
In a third aspect, there is provided a vehicle discharge control method including:
responding to first state switching of a discharging branch in the vehicle, detecting alternating current in the discharging branch, and controlling a switching device in the discharging branch to be disconnected when the alternating current is smaller than a target value, wherein the electric connection is between a first end and a second end in the discharging branch, the first end is connected with an alternating current port of a bidirectional vehicle-mounted charger in the vehicle, the second end forms a discharging port of the discharging branch, the discharging port is used for connecting a load, the switching device is connected between the first end and the second end in series, and the first state is switched from a discharging state to a power-off state;
And in response to the second state switching of the discharging branch, controlling the switching device to gradually conduct the electric connection, wherein the second state switching is switched from a power-off state to a discharging state.
In one aspect of the vehicle discharge control method, the controlling the switching device in the discharge branch to be electrically disconnected when the ac current is less than a target value includes:
And controlling the switching device to break the electrical connection when the alternating current is zero.
In one aspect of the above vehicle discharge control method, the switching device is a switching tube, and the controlling the switching device to gradually turn on the electrical connection includes:
and controlling the on duty ratio of the switching tube to gradually rise from 0% to 100%.
The vehicle-mounted discharging system is characterized by comprising a controller and a plurality of discharging branches, wherein the first ends of the discharging branches are connected with an alternating current port of a bidirectional vehicle-mounted charger, the second ends of the discharging branches form discharging ports of the discharging branches, and the discharging ports are used for being connected with a load;
the discharging branch comprises a switching device connected in series between the first end and the second end, and the switching device is used for conducting or disconnecting the electric connection between the first end and the second end;
The controller is configured to:
Detecting alternating current in the discharge branch in response to first state switching of the discharge branch, and controlling the switching device to disconnect the electrical connection when the alternating current is smaller than a target value, wherein the first state switching is changed from a discharge state to a power-off state;
And in response to the second state switching of the discharging branch, controlling the switching device to gradually conduct the electric connection, wherein the second state switching is switched from a power-off state to a discharging state.
The system according to claim 1, wherein said controlling said switching device to disconnect said electrical connection when said alternating current is less than a target value comprises:
And controlling the switching device to break the electrical connection when the alternating current is zero.
The system according to claim 1, wherein the switching device is a switching tube, and the controlling the switching device to gradually turn on the electrical connection includes:
and controlling the on duty ratio of the switching tube to gradually rise from 0% to 100%.
The system of claim 1, wherein the first end and the second end each comprise a live terminal and a neutral terminal;
the switching device is connected in series between the live wire terminals of the first end and the second end;
Or two switching devices, one switching device is connected in series between the live wire terminal of the first end and the live wire terminal of the second end, and the other switching device is connected in series between the zero wire terminal of the first end and the zero wire terminal of the second end.
The system of claim 1, wherein the discharge leg further comprises:
And a current sensor connected in series between the switching device and the second end, wherein the current sensor is used for detecting alternating current in the discharge branch.
The system of claim 1, wherein the discharge leg further comprises a current sensor, the second ends each comprising a live terminal and a neutral terminal;
the current sensor is connected in series between the switching device and the live wire terminal;
Or two current sensors, one of which is connected in series between the switching device and the live terminal and the other of which is connected in series between the switching device and the neutral terminal, and the controller is further configured to disconnect the electrical connection of the switching device when both of the current sensors detect that the alternating current is zero.
The system of claim 5, wherein the discharge leg further comprises an isolation sampling circuit, the isolation sampling circuit being connected to the current sensor and the controller, respectively;
the controller is further configured to acquire the alternating current detected by the current sensor through the isolated sampling circuit.
The system according to claim 1, wherein the discharge branch further comprises an isolation driving circuit, the isolation driving circuit being connected to the switching device and the controller, respectively;
The controller is further configured to control the switching device to open or gradually turn on the electrical connection through the isolation driving circuit.
The system of claim 1, wherein the controller is further configured to control the switching device to disconnect the electrical connection if a current anomaly is detected in the discharge leg, wherein the current anomaly includes at least a leakage, an overcurrent, and a short circuit.
The system according to claim 3, wherein the switching tube is a MOS tube.
A vehicle comprising a bidirectional on-board charger and the on-board discharge system of any one of claims 1 to 10.
A vehicle discharge control method, characterized by comprising:
responding to first state switching of a discharging branch in the vehicle, detecting alternating current in the discharging branch, and controlling a switching device in the discharging branch to be disconnected when the alternating current is smaller than a target value, wherein the electric connection is between a first end and a second end in the discharging branch, the first end is connected with an alternating current port of a bidirectional vehicle-mounted charger in the vehicle, the second end forms a discharging port of the discharging branch, the discharging port is used for connecting a load, the switching device is connected between the first end and the second end in series, and the first state is switched from a discharging state to a power-off state;
And in response to the second state switching of the discharging branch, controlling the switching device to gradually conduct the electric connection, wherein the second state switching is switched from a power-off state to a discharging state.
The method of claim 12, wherein controlling the switching devices in the discharge leg to be disconnected when the ac current is less than a target value comprises:
And controlling the switching device to break the electrical connection when the alternating current is zero.
The method of claim 12, wherein the switching device is a switching tube, and the controlling the switching device to gradually turn on the electrical connection comprises:
and controlling the on duty ratio of the switching tube to gradually rise from 0% to 100%.
An electronic device according to claim 15, comprising:
At least one processor;
And a memory communicatively coupled to the at least one processor;
wherein the memory has stored therein a computer program which when executed by the at least one processor implements the vehicle discharge control method of any one of claims 12 to 14.
A computer readable storage medium having stored therein a plurality of program codes, wherein the program codes are adapted to be loaded and executed by a processor to perform the vehicle discharge control method of any one of claims 12 to 14.
One or more of the above technical solutions of the present application at least has one or more of the following
The beneficial effects are that:
In one technical scheme of the vehicle-mounted discharging system, the system comprises a controller and a plurality of discharging branches, wherein a first end of each discharging branch is connected with an alternating current port of a bidirectional vehicle-mounted charger, a second end of each discharging branch forms a discharging port of each discharging branch, each discharging port is used for being connected with a load, each discharging branch comprises a switching device connected in series between the corresponding first end and the corresponding second end, each switching device is used for conducting or disconnecting the corresponding electric connection between the corresponding first end and the corresponding second end, and the controller is configured to conduct first state switching on each discharging branch, detect alternating current in each discharging branch, control the corresponding switching device to disconnect the corresponding electric connection when the alternating current is smaller than a target value, conduct first state switching to be switched from a discharging state to a power-off state, and conduct second state switching to be switched from the power-off state to the discharging state in response to second state switching on each discharging branch.
In the above embodiment, the target value is a comparatively small current value, for example, the target value is a current value close to zero. And under the condition that the bidirectional vehicle-mounted charger is not stopped, if the electric connection is disconnected when the alternating current is the target value, the charging quantity of the discharge port is in a safe range, and the damage to human bodies or other equipment is avoided. When the alternating current is smaller than the target value, the switching device is controlled to be disconnected, the load is actually powered off when the load current is smaller (such as close to zero), and the impact current is unlikely to exist because the load current is smaller, and when the load needs to be powered, the switching device is controlled to be conducted gradually and electrically, so that the voltage of the load is enabled to be higher than the target voltage (namely the power supply voltage actually output by the bidirectional vehicle-mounted charger) gradually, voltage mutation does not occur, the load current does not occur suddenly, and therefore the impact current is also not generated. Therefore, based on the above embodiment, no impact current is generated whether the load is powered (or the discharging branch is started) or the load is powered off (or the discharging branch is stopped), so that the bidirectional vehicle-mounted charger is not required to be stopped when the load is started or switched, and the damage caused by the impact current is avoided. Meanwhile, the bidirectional vehicle-mounted charger does not stop, so that the bidirectional vehicle-mounted charger can quickly respond when the load is started, and timely power is supplied to the load. Each discharge branch is not affected mutually, and each discharge branch can be started or stopped arbitrarily, which can be understood as thermal switching of the discharge branch or load. In addition, because the bidirectional vehicle-mounted charger does not need to stop, normal power supply of other loads is not affected when the loads are started, the situation that the loads are forced to be powered off due to the fact that the bidirectional vehicle-mounted charger stops is avoided, and further loss of load data/states caused by power off can be avoided.
Drawings
The present disclosure will become more readily understood with reference to the accompanying drawings. It is to be understood by persons of ordinary skill in the art that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the application. Wherein:
FIG. 1 is a schematic illustration 1 of an in-vehicle electrical discharge system according to one embodiment of the present application;
FIG. 2 is a schematic illustration 2 of an in-vehicle electrical discharge system according to one embodiment of the present application;
FIG. 3 is a schematic diagram 3 of an in-vehicle electrical discharge system according to one embodiment of the application;
FIG. 4 is a schematic diagram of an electronic device according to one embodiment of the application;
reference numerals:
11, a memory and 12, a processor.
Detailed Description
Some embodiments of the application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present application, and are not intended to limit the scope of the present application.
The personal information of the related user possibly related in each embodiment of the application is personal information which is actively provided by the user or generated by using the product/service in the process of using the product/service and is obtained by authorization of the user, and is processed based on the reasonable purpose of the business scene according to legal, legal and necessary principles strictly according to the requirements of laws and regulations.
The personal information of the user processed by the application can be different according to specific product/service scenes, and the personal information of the user can relate to account information, equipment information, driving information, vehicle information or other related information of the user according to the specific scene of using the product/service by the user. The present application treats the user's personal information and processes it with a high diligence.
The application is very important to the safety of the personal information of the user, and adopts reasonable and feasible safety protection measures which accord with the industry standard to protect the information of the user and prevent the personal information from unauthorized access, disclosure, use, modification, damage or loss.
The following describes an embodiment of the vehicle-mounted discharging system provided by the present application.
Referring to fig. 1, fig. 1 schematically illustrates a main structure of an in-vehicle discharging system according to some embodiments of the present application. As shown in fig. 1, the vehicle-mounted discharge system in the present embodiment may include a controller and a plurality of discharge branches (discharge branches 1 to n shown in fig. 1).
The connection structure of each discharge branch in the system is substantially the same, and a discharge branch will be described as an example. Specifically, the first end of the discharge branch is connected with an ac port of a bidirectional vehicle-mounted Charger (OBC) in the vehicle, and the second end of the discharge branch forms a discharge port of the discharge branch, which can be connected with a load. As shown in fig. 1, the discharge ports of the discharge branches 1 to n may be connected to loads 1 to n, respectively.
The discharge leg may comprise a switching device connected in series between the first and second terminals for making or breaking an electrical connection between the first and second terminals. When the electric connection is conducted, the alternating current output by the alternating current port of the bidirectional vehicle-mounted charger can be transmitted to a load through a discharging branch circuit to supply power to the load, and when the electric connection is disconnected, the alternating current output by the alternating current port of the bidirectional vehicle-mounted charger cannot be transmitted to the load through the discharging branch circuit, and the load is powered off. The switching device may be, but is not limited to, a switching transistor, a triode, a switching chip integrated with a switching transistor (e.g., a switching chip integrated with a MOS transistor), etc. In some preferred embodiments, a switching tube is used as the switching device. Further, in some embodiments, the switching transistor may be a MOS (Metal Oxide Semiconductor Field-Effect Transistor) transistor, and of course, other types of fully-controlled power electronic devices (Power Electronic Device) may also be used as the switching transistor, for example, unidirectional thyristors (SCR), bidirectional Thyristors (TRIAC), turn-off thyristors (GTO), static induction transistors SIT, integrated gate commutated thyristors IGCT, and the like, which are not particularly limited in this disclosure. The controller may employ MCU (Microcontroller Unit), as the application is not limited in this regard.
The states of the discharge branch include a discharge state and a power-off state. The power-off state is used for stopping the transmission of the alternating current output by the bidirectional vehicle-mounted charger to the discharge port so as to stop the power supply to the load connected with the discharge port. In this embodiment, the controller may be configured to switch the state of the discharge leg by:
(1) And in response to the first state switching of the discharge branch, detecting the alternating current in the discharge branch, and controlling the switching device to be electrically disconnected when the alternating current is smaller than the target value, wherein the first state switching is switched from the discharge state to the power-off state. The positive and negative of the ac power indicate the direction of the ac power, and do not indicate the magnitude of the ac power, and the ac current being smaller than the target value in this embodiment means that the current value of the ac power is smaller than the target value, regardless of the direction of the ac power.
The target value is a relatively small current value, for example, the target value is a current value close to zero. And under the condition that the bidirectional vehicle-mounted charger is not stopped, if the electric connection of the first end and the second end in the discharge branch is disconnected when the alternating current is the target value, the charging quantity of the discharge port is in a safe range, and the harm to human bodies or other equipment is avoided. Based on this, when determining the magnitude of the target value, the maximum ac current that does not cause harm to the human body or other devices when the electrical connection is disconnected without stopping the bidirectional vehicle-mounted charger may be obtained first, and then the magnitude of the target value is determined according to the maximum ac current, where the target value is smaller than or equal to the maximum ac current.
Based on the operation, the load can be powered off when the alternating current is smaller (such as close to zero), and no impact current is generated due to the smaller alternating current, so that no harm is brought to the switching device. In addition, the charge quantity of the discharge port of the discharge branch circuit after power failure is smaller, so that the power utilization safety of the system can be ensured, and the user or other equipment is prevented from touching the discharge port by mistake, so that safety accidents occur.
In some embodiments, when the alternating current is zero, the switching device can be controlled to disconnect the electrical connection of the first end and the second end in the discharge branch, so that zero current outage of the load is realized, the generation of impact current is avoided, and the safety of the discharge port after outage is further improved. The current of the alternating current can alternate between positive half cycles and negative half cycles with time, and the current is zero when the current enters the negative half cycles from the positive half cycles or enters the positive half cycles from the negative half cycles. In addition, in this embodiment, the ac output from the ac port of the bidirectional vehicle-mounted charger is single-phase ac, and it can be detected whether the current of the single-phase ac is zero by using a conventional zero-crossing detection technology.
(2) And in response to the second state switching of the discharge branch, controlling the switching device to conduct the electric connection step by step, wherein the second state switching is changed from the power-off state to the discharge state.
Before the second state switching is performed, the discharge branch is in a power-off state, and the output voltage of the discharge port is 0. If the control switch device is conducted and electrically connected step by step, the output voltage of the discharge port is increased from 0 to a target voltage, wherein the target voltage is the voltage output by the alternating current port of the bidirectional vehicle-mounted charger, namely the actual output power supply voltage of the bidirectional vehicle-mounted charger.
Based on the above operation, the voltage received by the load voltage is stepped up from 0 to the target voltage, no voltage jump (e.g., the voltage jumps from 0 to the target voltage) occurs, the voltage does not jump, the load current does not jump, and no rush current is generated.
In some embodiments, the switching device is a switching tube and the electrical connection between the first and second ends in the discharge leg is controlled by controlling the switching device to gradually increase the turn-on duty cycle of the switching tube from 0% to 100%. The output voltage of the discharge port is 0 when the on duty is 0%, and reaches the target voltage when the on duty is 100%. In some embodiments, a fixed duty cycle interval k (e.g., k=10%) may be preset, at which the on-duty cycle is stepped up from 0% to 100%. The value of the duty interval k can be flexibly set by those skilled in the art, and this embodiment is not particularly limited.
It can be determined from the above description that, based on the above structure, no impact current is generated in the discharging branch, whether the discharging branch is powered on (or started) or powered off (or stopped), so that the bidirectional vehicle-mounted charger is not required to be stopped when the load is started or switched, and harm caused by the impact current is avoided. Meanwhile, the bidirectional vehicle-mounted charger does not stop, so that the bidirectional vehicle-mounted charger can quickly respond when the load is started, and timely power is supplied to the load. And, each discharge branch is not affected mutually, each discharge branch can be started and stopped at will, which can be understood as thermal switching of the discharge branch or load. In addition, because the bidirectional vehicle-mounted charger does not need to stop, normal power supply of other loads is not affected when the loads are started, the situation that the loads are forced to be powered off due to the fact that the bidirectional vehicle-mounted charger stops is avoided, and further loss of load data/states caused by power off can be avoided.
The following continues to describe embodiments of the vehicle-mounted discharge system provided by the present application.
In some embodiments of the application, the discharge leg further comprises a current sensor connected in series in the discharge leg, the current sensor being operable to detect an alternating current in the discharge leg. The controller may sample the detection result of the current sensor, and then determine whether the ac current is zero according to the sampling result, and perform power-off control on the load when the ac current is zero (i.e., control the switching device in the discharge branch to disconnect the electrical connection between the first and second ends in the discharge branch). When the load is connected with the discharge port of the discharge branch, a power supply loop is formed among the bidirectional vehicle-mounted charger, the discharge branch and the load, and the alternating currents at different positions in the same loop are basically consistent, so that the current (or load current) of the discharge port can be represented. Therefore, the current sensor can be connected in series at any position of the discharge branch, and whether to perform power-off control on the load is determined based on the detection result of the current sensor. In some embodiments, to ensure the reliability of the load outage, a current sensor may be connected in series between the switching device and the second end (i.e., the discharge port) in the discharge branch, i.e., near the discharge port, so that the detection result of the current sensor can more truly represent the current of the discharge port (or the load current). As shown in fig. 2, the vehicle-mounted discharging system includes discharging branches 1 and 2, taking the discharging branch 1 as an example, a current sensor is connected in series between one end of a switching device and a discharging port (i.e., a second end of the discharging branch), and the other end of the switching device forms a first end of the discharging branch, where the first end is connected with an ac port of the bidirectional vehicle-mounted charger.
In some embodiments, the discharge leg further includes an isolation sampling circuit, the isolation sampling circuit being connected to the current sensor and the controller, respectively. The controller may be further configured to obtain the alternating current detected by the current sensor by isolating the sampling circuit, thereby determining whether the alternating current is zero. The isolation sampling circuit is not only used for sampling the detection result of the current sensor, but also can electrically isolate the current sensor from the controller. The voltage level of the alternating current output by the alternating current port of the bidirectional vehicle-mounted charger (for example, the alternating current voltage is 220V) may be far greater than the voltage level of the controller (for example, the voltage range is 1 to 5V), so that the voltage level of the discharging branch is also far greater than the voltage level of the controller, and the current sensor is electrically isolated from the controller, so that the controller can be protected.
In some embodiments, the discharge leg further includes an isolation drive circuit connected to the switching device and the controller, respectively. The controller may be further configured to control the switching device to open or gradually conduct the electrical connection between the first and second ends in the discharge leg by isolating the drive circuit. The isolation driving circuit can output a driving signal to the switching device tube under the control of the controller, and the switching device can be turned on or off under the control of the driving signal.
The following continues to describe embodiments of the vehicle-mounted discharge system provided by the present application.
In some embodiments of the present application, the first end and the second end of the discharge branch each include a live wire terminal and a neutral wire terminal, the ac port of the bidirectional vehicle-mounted charger also includes a live wire terminal and a neutral wire terminal, the live wire terminal and the neutral wire terminal of the first end in the discharge branch are respectively connected with the live wire terminal and the neutral wire terminal of the ac port, and when the second end (i.e., the discharge port) of the discharge branch is connected with a load, the live wire terminal and the neutral wire terminal of the load are respectively connected with the live wire terminal and the neutral wire terminal of the second end.
In the technical field of alternating current, if a current loop is formed between a human body and a live wire through the earth, the life safety of the human body is seriously threatened, and because the potential difference between a zero line and the earth is smaller, even if the current loop is formed between the human body and the zero line through the earth, the life safety of the human body is not seriously threatened. In some embodiments, the switching device in the discharge branch may be one, and this switching device may be connected in series between the live terminal of the first end and the live terminal of the second end. When the power-off control is carried out on the load, the switching device can be controlled to disconnect the electric connection between the fire wire terminals of the first end and the second end, namely, disconnect the fire wire, so that a current loop can not be formed between the human body and the fire wire even if the human body contacts the discharge port, and the power-off safety is ensured.
In some embodiments, to further ensure load outage safety, two switching devices may be provided in the discharge branch, one switching device being connected in series between the live terminal of the first end and the live terminal of the second end, and the other switching device being connected in series between the neutral terminal of the first end and the neutral terminal of the second end. When the controller switches the state of the discharging branch, the two switching devices are simultaneously controlled in the same way, and the two switching devices are simultaneously turned on or turned off. When the power-off control is carried out on the load, the live wire and the zero wire can be disconnected at the same time, so that a current loop can not be formed between the human body and the live wire or between the human body and the zero wire even if the human body contacts with the discharge port, and potential hazards possibly generated by the live wire and the zero wire are avoided.
In some embodiments, the current sensor in the discharge branch may be one, and the current sensor is connected in series between the switching device and the live terminal of the second end (i.e. the discharge port), and the detection result of the current sensor can more truly represent the current transmitted to the discharge port through the live wire. As can be seen from the description of the foregoing embodiments, in order to ensure the outage safety of the load, the live wire must be disconnected, and since the detection result of the current sensor can truly represent the current transmitted by the live wire, the outage of the load can be more reliably implemented based on the detection result, and the outage safety is ensured.
In some embodiments, two current sensors may be provided in the discharge branch, one in series between the switching device and the live terminal of the second end (i.e. the discharge port), the detection result of which can more realistically represent the current transmitted through the live wire to the discharge port, and the other in series between the switching device and the neutral terminal of the second end (i.e. the discharge port), the detection result of which can more realistically represent the current transmitted through the discharge port to the neutral. If the two current sensors detect that the alternating current is smaller than the target value, the current (or load current) of the discharge port is necessarily smaller than the target value, and the load is subjected to power-off control at the moment, so that the reliability of power-off can be further improved, and the safety of power-off is ensured. Based on this, in the present embodiment, the controller, when switching the state of the discharge branch, opens the electrical connection between the first and second ends in the discharge branch when both current sensors detect that the alternating current is smaller than the target value.
As shown in fig. 3, the vehicle-mounted discharging system includes discharging branches 1 and 2, taking the discharging branch 1 as an example, the discharging branch 1 includes switching tubes 1 and 2, and further includes current sensors 1 and 2, wherein the current sensor 1 is connected in series between the switching tube 1 and a live wire terminal (L in fig. 3) of a second end (i.e., a discharging port), and the current sensor 2 is connected in series between the switching tube 2 and a neutral wire terminal (N in fig. 3) of the second end (i.e., the discharging port). When the first state of the discharge branch is switched, the controller controls the switching tubes 1 and 2 to be simultaneously turned off when the current sensors 1 and 2 detect that the alternating current is zero, so that the electrical connection between the first end and the second end in the discharge branch 1 is disconnected. When the second state switching is performed on the discharge branch, the controller can control the on duty ratio of the switching tubes 1 and 2 to be gradually increased from 0% to 100% at the same time, so that the electric connection between the first end and the second end in the discharge branch 1 is conducted.
The following continues to describe embodiments of the vehicle-mounted discharge system provided by the present application.
In some embodiments of the present application, the controller may be further configured to detect whether a current abnormality occurs in the discharge leg, and if so, to control the switching device to disconnect the electrical connection between the first and second ends in the discharge leg. Based on the method, the load can be timely powered off when current abnormality occurs, and the vehicle-mounted discharging system and the load are protected. The abnormal current at least comprises abnormal conditions such as leakage, overcurrent, short circuit and the like. In this embodiment, conventional leakage, overcurrent and short-circuit detection methods may be used for detection, which is not particularly limited in this embodiment. In addition, the bidirectional vehicle-mounted charger can also perform insulation detection on the alternating current port, and if an insulation fault is detected, the output of alternating current can also be stopped, so that the vehicle-mounted discharging system and the load are protected.
Another aspect of the application also provides a vehicle.
In one embodiment of a vehicle according to the present application, the vehicle may include a bi-directional on-board charger and an on-board discharge system as described in the system embodiments above. The vehicle may be a vehicle using at least a power battery as a power source, and the vehicle may be a pure electric vehicle, a hybrid vehicle, or the like.
The application also provides a vehicle discharge control method which can be applied to the vehicle-mounted discharge system in the embodiment of the system.
In an embodiment of the vehicle discharge control method according to the present application, the method may include the following steps S101 to S102.
In response to the first state switching of the discharge branch in the vehicle, detecting an alternating current in the discharge branch and controlling a switching device in the discharge branch to be electrically disconnected when the alternating current is less than a target value S101.
The electric connection is electric connection between a first end and a second end in the discharging branch, the first end is connected with an alternating current port of a bidirectional vehicle-mounted charger in the vehicle, the second end forms a discharging port of the discharging branch, the discharging port is used for connecting a load, the switching device is connected between the first end and the second end in series, and the first state is switched from a discharging state to a power-off state.
In some embodiments, when the switching device is controlled to disconnect the electrical connection, the switching device may be controlled to disconnect the electrical connection when the alternating current is zero.
Step S102, in response to the second state switching of the discharging branch, the switching device is controlled to conduct the electric connection step by step, and the second state switching is changed from the power-off state to the discharging state.
In some embodiments, when the switching device is a switching tube, the on-duty ratio of the switching tube may be controlled to be gradually increased from 0% to 100% so as to gradually turn on the above electrical connection.
The discharging branch, the target value, the bidirectional vehicle-mounted charger and the switching device are the same as those in the foregoing system embodiment, and are not described herein. The load can be vehicle-mounted equipment or other electric equipment. For example, the electric equipment can be a mobile phone, a notebook computer and other electric equipment.
Based on the above-mentioned methods from step S101 to step S102, in the case that there are a plurality of discharge branches in the vehicle, the load connected to any one discharge port (i.e., the discharge port of any discharge branch) may be powered off and powered on, and the loads connected to the discharge ports may not affect each other. When the load connected with the discharge port is switched, the bidirectional vehicle-mounted charger is not required to be stopped, and only the corresponding discharge branches are required to be sequentially switched in the first state and the second state, so that normal power supply of other discharge branches to other loads is not influenced, the situation that the power is forced to be cut off due to the stopping of the bidirectional vehicle-mounted charger is avoided for other loads, and further loss of load data/state caused by power cut-off can be avoided.
Another aspect of the application also provides a computer-readable storage medium.
In an embodiment of a computer-readable storage medium according to the present application, the computer-readable storage medium may be configured to store a program for executing the vehicle discharge control method of the above-described method embodiment, the program being loadable and executable by a processor to implement the above-described vehicle discharge control method. For convenience of explanation, only those portions of the embodiments of the present application that are relevant to the embodiments of the present application are shown, and specific technical details are not disclosed, please refer to the method portions of the embodiments of the present application. The computer readable storage medium may be a storage device including various electronic devices, and optionally, the computer readable storage medium in the embodiments of the present application is a non-transitory computer readable storage medium.
The application further provides electronic equipment.
In an embodiment of an electronic device according to the application, the electronic device may comprise at least one processor, and a memory communicatively coupled to the at least one processor, wherein the memory stores a computer program that when executed by the at least one processor implements the method of any of the embodiments described above. Referring to fig. 4, memory 11 and processor 12 are illustratively shown in fig. 4 as being communicatively coupled via a bus. In the embodiment of the application, the electronic device may be a vehicle-mounted controller such as a vehicle.
Thus far, the technical solution of the present application has been described in connection with one embodiment shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present application is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present application, and such modifications and substitutions will fall within the scope of the present application.

Claims (10)

1. The vehicle-mounted discharging system is characterized by comprising a controller and a plurality of discharging branches, wherein the first ends of the discharging branches are connected with an alternating current port of a bidirectional vehicle-mounted charger, and the second ends of the discharging branches form discharging ports of the discharging branches, and the discharging ports are used for being connected with a load;
the discharging branch comprises a switching device connected in series between the first end and the second end, and the switching device is used for conducting or disconnecting the electric connection between the first end and the second end;
The controller is configured to:
Detecting alternating current in the discharge branch in response to first state switching of the discharge branch, and controlling the switching device to disconnect the electrical connection when the alternating current is smaller than a target value, wherein the first state switching is changed from a discharge state to a power-off state;
And in response to the second state switching of the discharging branch, controlling the switching device to gradually conduct the electric connection, wherein the second state switching is switched from a power-off state to a discharging state.
2. The system of claim 1, wherein said controlling said switching device to disconnect said electrical connection when said alternating current is less than a target value comprises:
And controlling the switching device to break the electrical connection when the alternating current is zero.
3. The system of claim 1, wherein the switching device is a switching tube, the controlling the switching device to gradually turn on the electrical connection comprising:
and controlling the on duty ratio of the switching tube to gradually rise from 0% to 100%.
4. The system of claim 1, wherein the first end and the second end each comprise a live terminal and a neutral terminal;
the switching device is connected in series between the live wire terminals of the first end and the second end;
Or two switching devices, one switching device is connected in series between the live wire terminal of the first end and the live wire terminal of the second end, and the other switching device is connected in series between the zero wire terminal of the first end and the zero wire terminal of the second end.
5. The system of claim 1, wherein the discharge leg further comprises:
And a current sensor connected in series between the switching device and the second end, wherein the current sensor is used for detecting alternating current in the discharge branch.
6. The system of claim 1, wherein the discharge leg further comprises a current sensor, the second ends each comprising a live terminal and a neutral terminal;
the current sensor is connected in series between the switching device and the live wire terminal;
Or two current sensors, one of which is connected in series between the switching device and the live terminal and the other of which is connected in series between the switching device and the neutral terminal, and the controller is further configured to disconnect the electrical connection of the switching device when both of the current sensors detect that the alternating current is zero.
7. The system of claim 5, wherein the discharge leg further comprises an isolation sampling circuit, the isolation sampling circuit being connected to the current sensor and the controller, respectively;
the controller is further configured to acquire the alternating current detected by the current sensor through the isolated sampling circuit.
8. The system of claim 1, wherein the discharge leg further comprises an isolation drive circuit, the isolation drive circuit being connected to the switching device and the controller, respectively;
The controller is further configured to control the switching device to open or gradually turn on the electrical connection through the isolation driving circuit.
9. The system of claim 1, wherein the controller is further configured to:
if the discharge branch is detected to have current abnormality, the switching device is controlled to disconnect the electrical connection;
wherein the current anomaly includes at least leakage, overcurrent and short circuit.
10. The system of claim 3, wherein the system further comprises a controller configured to control the controller,
The switch tube is an MOS tube.
CN202511171118.5A 2025-08-20 2025-08-20 On-vehicle discharge system, vehicle, vehicle discharge control method, device and medium Pending CN120816929A (en)

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