CN114590142B - Charging processing method and related device - Google Patents
Charging processing method and related device Download PDFInfo
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- CN114590142B CN114590142B CN202011406282.7A CN202011406282A CN114590142B CN 114590142 B CN114590142 B CN 114590142B CN 202011406282 A CN202011406282 A CN 202011406282A CN 114590142 B CN114590142 B CN 114590142B
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- power supply
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- 238000003672 processing method Methods 0.000 title abstract description 18
- 238000000034 method Methods 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 23
- 239000003990 capacitor Substances 0.000 claims description 20
- 238000009413 insulation Methods 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 description 23
- 238000010586 diagram Methods 0.000 description 9
- 239000013256 coordination polymer Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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- 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
- B60L53/10—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 characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
-
- 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
- B60L53/60—Monitoring or controlling charging stations
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
-
- 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
- B60L53/66—Data transfer between charging stations and vehicles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- 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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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
The embodiment of the application discloses a charging processing method and a related device, comprising the following steps: closing a first relay switch, a second relay switch and a third relay switch, wherein the first relay switch is used for pre-charging a vehicle terminal, the second relay switch is used for switching on a power supply negative electrode, and the third relay switch is used for switching on a charging pile negative electrode; if the first relay switch, the second relay switch and the third relay switch are confirmed to be in the closed state, the charging pile and the power supply can provide charging voltage, the fourth relay switch is closed, the charging pile can charge the vehicle terminal through the power supply, and the fourth relay switch is used for switching on the positive electrode of the power supply. By setting the closing sequence of the relay switch of the charging loop, a current loop generated by charging voltage flows from the pre-charging relay of the vehicle terminal to the power supply cathode and the charging pile cathode, so that the voltage on the power supply side is the forward voltage from the power supply cathode to the power supply anode, the interference to the charging loop is reduced, and the charging element is prevented from being damaged.
Description
Technical Field
The application relates to the technical field of electric automobiles, in particular to a charging treatment method and a related device.
Background
The electric automobile is one of the hot choices of people in the new energy era, and has good skill and low pollution emission. Among them, in order to be able to facilitate the energy supply to electric vehicles, charging piles for charging are often provided in parking lots and streets.
In the related art, when charging is performed through a charging pile, because the charging flow is not well set, electric energy impact is easily caused, and the problems of damage to components and low charging efficiency are caused.
Disclosure of Invention
In order to solve the technical problems, the application provides a charging processing method, which enables a current loop generated by charging voltage to flow from a pre-charging relay of a vehicle terminal to a power supply negative electrode and a charging pile negative electrode by setting the closing sequence of a relay switch of the charging loop, and enables the voltage of a power supply side to be positive voltage from the power supply negative electrode to a power supply positive electrode, thereby reducing the interference to the charging loop and avoiding the voltage from damaging a charging element.
The embodiment of the application discloses the following technical scheme:
in a first aspect, an embodiment of the present application provides a charging processing method, including:
closing a first relay switch, a second relay switch and a third relay switch, wherein the first relay switch is used for pre-charging a vehicle terminal, the second relay switch is used for switching on a power supply negative electrode, and the third relay switch is used for switching on a charging pile negative electrode;
if the first relay switch, the second relay switch and the third relay switch are confirmed to be in a closed state, the charging pile and the power supply can provide charging voltage, the fourth relay switch is closed, so that the charging pile can charge the vehicle terminal through the power supply, and the fourth relay switch is used for switching on the positive electrode of the power supply.
In one possible implementation, before the first relay switch, the second relay switch, and the third relay switch are confirmed to be in a closed state, and the charging pile and the power supply are capable of providing a charging voltage, and the fourth relay switch is closed, the method further includes:
and closing a fifth relay switch, wherein the fifth relay switch is used for switching on a battery cathode of the vehicle terminal, and the fifth relay switch and the first relay switch form a pre-charging loop for pre-charging a charging capacitor of the vehicle terminal, so that the difference value between the voltages at two sides of the charging capacitor and the charging voltage corresponding to the charging pile is reduced to be within a preset range.
In one possible implementation, the closing the first, second and third relay switches specifically includes:
closing the third relay switch and a sixth relay switch, wherein the sixth relay switch is used for switching on the anode of the charging pile so that the charging pile can transmit charging voltage to the vehicle terminal;
closing the first relay switch to enable the vehicle terminal to be pre-charged;
and closing the second relay switch, so that under the action of the charging voltage, the current in the vehicle terminal can flow in a passage formed by the first relay switch, the second relay switch and the third relay switch.
In one possible implementation, before the closing of the first, second and third relay switches, the method further comprises:
if the charging gun of the charging pile is determined to be connected with the vehicle terminal, performing insulation detection;
and if the voltage of the charging pile is discharged through the insulation detection, sending a communication handshake message to the vehicle terminal, wherein the communication handshake message is used for indicating the vehicle terminal to execute a charging preparation flow.
In one possible implementation, before the closing of the first relay switch, the method further includes:
and sending a self-checking signal to the vehicle terminal, wherein the self-checking signal is used for indicating the vehicle terminal to perform self-checking through a battery management system.
And if the self-checking is passed, executing the action of closing the first relay switch.
In a second aspect, an embodiment of the present application provides a charging processing apparatus, including a first closing unit and a second closing unit:
the first closing unit is used for closing a first relay switch, a second relay switch and a third relay switch, the first relay switch is used for carrying out pre-charging treatment on a vehicle terminal, the second relay switch is used for switching on a power supply negative electrode, and the third relay switch is used for switching on a charging pile negative electrode;
the second closing unit is used for closing the first relay switch, the second relay switch and the third relay switch if the first relay switch, the second relay switch and the third relay switch are confirmed to be in a closed state, the charging pile and the power supply can provide charging voltage, the fourth relay switch is closed, the charging pile can charge the vehicle terminal through the power supply, and the fourth relay switch is used for being connected with the positive electrode of the power supply.
In one possible implementation, the device further comprises a third closing unit:
the third closing unit is used for closing a fifth relay switch, the fifth relay switch is used for switching on a battery cathode of the vehicle terminal, and the fifth relay switch and the first relay switch form a pre-charging loop for pre-charging a charging capacitor of the vehicle terminal, so that the difference value between the voltages at two sides of the charging capacitor and the charging voltage corresponding to the charging pile is reduced to be within a preset range.
In one possible implementation, the first closing unit is specifically configured to:
closing the third relay switch and a sixth relay switch, wherein the sixth relay switch is used for switching on the anode of the charging pile so that the charging pile can transmit charging voltage to the vehicle terminal;
closing the first relay switch to enable the vehicle terminal to be pre-charged;
and closing the second relay switch, so that under the action of the charging voltage, the current in the vehicle terminal can flow in a passage formed by the first relay switch, the second relay switch and the third relay switch.
In one possible implementation, the device further comprises a detection unit and a bleed unit:
the detection unit is used for performing insulation detection if the charging gun of the charging pile is determined to be connected with the vehicle terminal;
and the discharging unit is used for discharging the voltage of the charging pile and sending a communication handshake message to the vehicle terminal if the voltage of the charging pile is detected by the insulation detection, wherein the communication handshake message is used for indicating the vehicle terminal to execute a charging preparation flow.
In a possible implementation manner, the apparatus further includes a sending unit and an executing unit:
the sending unit is used for sending a self-checking signal to the vehicle terminal, and the self-checking signal is used for indicating the vehicle terminal to perform self-checking through a battery management system.
And the execution unit is used for executing the action of closing the first relay switch if the self-checking is passed.
According to the technical scheme, the charging processing method is provided, the processing equipment can be used for closing the first relay switch, the second relay switch and the third relay switch which are positioned at the vehicle terminal and used for pre-charging the vehicle terminal before closing the fourth relay switch positioned at the positive electrode of the power supply, so that charging current brought by charging voltage of the charging pile can flow from the vehicle terminal to the negative electrode of the power supply and the negative electrode of the charging pile, the voltage at the power supply side is positive voltage from the negative electrode to the positive electrode, the interference of the positive voltage on the charging signal is lower, meanwhile, the damage to the charging element is lower due to the fact that the positive voltage is consistent with the resistance direction of the charging element, and the charging effect is improved.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, 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 flowchart of a charging processing method according to an embodiment of the present application;
fig. 2 is a schematic diagram of a charging processing method according to an embodiment of the present application;
fig. 3 is a schematic diagram of a charging processing method according to an embodiment of the present application;
fig. 4 is a schematic diagram of a charging processing method according to an embodiment of the present application;
fig. 5 is a flowchart of a charging processing method in an actual application scenario provided in an embodiment of the present application;
fig. 6 is a block diagram of a charging processing device according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described below with reference to the accompanying drawings.
Charging problems of electric vehicles have been one of the key problems of interest to those skilled in the art. In the related art, when charging an electric vehicle using a charging pile, a vehicle terminal negative electrode, a power supply positive electrode, and a relay switch on a charging pile positive electrode side are preferably turned on, which causes a charging current to flow from the terminal negative electrode to the power supply positive electrode and the charging pile positive electrode under the action of a charging voltage, thereby bringing a reverse voltage from positive to negative to the power supply side, which severely interferes with a charging signal during charging, and easily damages a charging element such as a transient diode, etc.
In order to solve the technical problems, the application provides a charging processing method, which enables a current loop generated by charging voltage to flow from a pre-charging relay of a vehicle terminal to a power supply negative electrode and a charging pile negative electrode by setting the closing sequence of a relay switch of the charging loop, and enables the voltage of a power supply side to be positive voltage from the power supply negative electrode to a power supply positive electrode, thereby reducing the interference to the charging loop and avoiding the voltage from damaging a charging element.
It will be appreciated that the method may be applied to a processing device, which is a processing device having a charging processing function, for example, a terminal device or a server having a charging processing function. The method can be independently operated by the terminal equipment or the server, can also be applied to a network scene of communication between the terminal equipment and the server, and is operated by the cooperation of the terminal equipment and the server. The terminal device may be a mobile phone, a vehicle-mounted computer, a personal digital assistant (Personal Digital Assistant, PDA for short), a tablet computer, a charging pile, and the like. The server can be understood as an application server or a Web server, and in actual deployment, the server can be an independent physical server for charge management and control, or a server cluster or a distributed system formed by a plurality of physical servers. The terminal and the server may be directly or indirectly connected through wired or wireless communication, and the present application is not limited herein.
Next, a charging processing method provided by an embodiment of the present application will be described with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a flowchart of a charging processing method according to an embodiment of the present application, where the method includes:
s101: the first relay switch, the second relay switch, and the third relay switch are closed.
The first relay switch is connected in parallel to the positive side of the battery of the vehicle terminal, as shown in fig. 2, fig. 2 is a schematic diagram of a charging circuit, where the first relay switch may be a switch pre-charging K2, and the first relay switch is used for pre-charging the vehicle terminal. The second relay switch may be located on the negative side of the power supply for charging, for switching on the negative power supply, as the switch in fig. 2 charges negative K5 quickly. A third relay switch may be located at the charging post negative pole for switching on the charging post negative pole, as the switch post negative K7 in fig. 2.
S102: if the first relay switch, the second relay switch and the third relay switch are confirmed to be in the closed state, the charging pile and the power supply can provide charging voltage, and the fourth relay switch is closed.
Wherein the fourth relay switch may be located on the positive side of the power supply for charging, for example the switch in fig. 2 is fast charging positive K4. After K4 is turned on, the charging stake can be enabled to charge the vehicle terminal through the power source, and the fourth relay switch can be used to turn on the positive pole of the power source.
The fourth relay switch is closed after the first relay switch, the second relay switch and the third relay switch are confirmed to be in the closed state, so that the on time of a passage where the fourth relay switch is located is later than that of a passage formed by the first relay switch, the second relay switch and the third relay switch. At this time, since the charging pile and the power supply can supply the charging voltage, the current can flow preferentially in the path by the charging voltage, and the forward voltage from the negative electrode of the power supply to the positive electrode of the power supply is formed on the power supply side.
For example, in the schematic diagram shown in fig. 1, since the switch pre-charge K2, the fast charge K5 and the post-charge K7 are preferentially closed, the post-close switch fast charge K4 is preferentially closed, so that under the action of the charging voltage, current can flow from the ground line PE through the pre-charge resistor, the X capacitor, the Y capacitor and the ground line, and a positive voltage from the negative electrode to the positive electrode of the power supply is formed on the power supply side, and the voltage CP voltage effect of the voltage CP generating the charging signal CP is low. As shown in fig. 3, fig. 3 is a schematic diagram of a charging process, and it can be seen that the influence time on the CP voltage is not more than 3 μs and the influence degree is not more than 105V. Meanwhile, since the voltage direction is positive, and the resistance direction of the element in the charging circuit is also usually positive, the voltage direction is the same as the element direction, and breakdown damage is not caused to the element such as a TVS tube.
According to the technical scheme, the charging processing method is provided, the processing equipment can be used for closing the first relay switch, the second relay switch and the third relay switch which are positioned at the vehicle terminal and used for pre-charging the vehicle terminal before closing the fourth relay switch positioned at the positive electrode of the power supply, so that charging current brought by charging voltage of the charging pile can flow from the vehicle terminal to the negative electrode of the power supply and the negative electrode of the charging pile, the voltage at the power supply side is positive voltage from the negative electrode to the positive electrode, the interference of the positive voltage on the charging signal is lower, meanwhile, the damage to the charging element is lower due to the fact that the positive voltage is consistent with the resistance direction of the charging element, and the charging effect is improved.
It will be appreciated that there is often a charging capacitor in the charging circuit that can act to suppress differential mode interference and common mode interference, such as the capacitors X and Y in the circuit shown in fig. 2. When charging, the voltage on the charging pile and the power supply side is high because the electric energy on the vehicle terminal side is low and the voltage on the vehicle terminal side is low, so if the charging pile, the power supply and the vehicle terminal are directly connected, the differential pressure on both sides of the capacitor is excessively large, and the charging element is easily damaged. Based on this, in one possible implementation manner, in order to further improve the safety of charging, before closing the fourth relay switch, the processing device may close the fifth relay switch, which is used to turn on the battery negative electrode of the vehicle terminal, and form a pre-charging loop for pre-charging the charging capacitor of the vehicle terminal with the first relay switch, so that, before starting to charge the battery of the vehicle terminal, a difference between voltages on both sides of the charging spot and a charging voltage corresponding to the charging pile is reduced to be within a preset range, which may be set based on the voltage bearing capability of the charging element, through the pre-charging operation. When the fourth relay switch is closed to start charging, larger pressure difference can not be generated on two sides of the charging capacitor, and damage to the charging element can be avoided to a certain extent.
For example, in the schematic diagram shown in fig. 1, before the switch is closed to charge positive K4, the processing device may be first closed and further switch the primary negative K3, so that the primary negative K3 and the pre-charge K2 can form a pre-charge loop to perform a pre-charge operation on the capacitor X. After pre-charging, when the switch is closed to charge positive K4 quickly, the pressure difference generated on two sides of the capacitor X is smaller, as shown in FIG. 4, the pressure difference fluctuation is smaller, and the CP signal is not affected and fluctuated obviously.
Furthermore, in one possible implementation, to describe the charging process more accurately, the closing of the first relay switch, the second relay switch and the third relay switch may specifically include:
closing a third relay opening and hanging and a sixth relay switch, wherein the sixth relay switch is used for switching on the positive electrode of the charging pile so that the charging pile can transmit charging voltage to a vehicle terminal; subsequently, the processing device may close the first relay switch to perform a pre-charge operation on the vehicle-mounted terminal through the charging voltage. The pre-charging operation is used for pre-charging a motor, a dc-dc converter, an air conditioner, accessories inside a battery pack, and the like in a vehicle terminal. Finally, the processing device may close the second relay switch such that under the action of the charging voltage, the current of the vehicle terminal may flow in a path formed by the first relay switch, the second relay switch and the third relay switch.
It will be appreciated that other safety handling operations may also be performed during the charging process in order to further enhance the safety of the vehicle charging. For example, in one possible implementation, the processing device may also monitor the connection status of the charging gun for charging in real time before closing the first, second and third relay switches. If it is determined that the charging gun of the charging pile is connected with the vehicle terminal, the processing device can perform insulation detection on the charging pile to determine whether the charging loop is leaked or not. If through this insulation detection, processing equipment can carry out the voltage to this electric pile that fills and release, avoids charging in-process because of the too high electric leakage of voltage, improves the security of charging. Meanwhile, the processing device may send a communication handshake message to the vehicle terminal, where the communication handshake message is used to instruct the vehicle terminal to perform a charging preparation procedure, and the charging preparation procedure may be a series of operations of closing the relay switch in the above method.
In addition, in order to improve the safety of the vehicle terminal when charging, further avoiding damage to the user or related elements, in one possible implementation, the processing device may also send a self-test signal to the vehicle terminal before closing the first relay switch, which may be used to instruct the vehicle terminal to perform a self-test through the battery management system. If the self-check is passed, the processing device may perform an action of closing the first relay, and prepare for charging.
Next, a charging processing method provided by the embodiment of the application is described with reference to an actual application scenario.
Referring to fig. 5, fig. 5 is a flowchart of a charging processing method in a practical application scenario, where the charging processing method may be applied to the charging circuit shown in fig. 2, and the method includes:
s501: and carrying out insulation detection of the charging pile.
After the charging gun is determined to be completely connected with the vehicle terminal, the low-voltage auxiliary loop is conducted, the voltage is maintained at 12V, insulation detection is carried out, and the output voltage during insulation detection is the smaller value of the highest allowable total voltage and the rated voltage of the power supply equipment in the communication handshake message.
S502: and discharging the charging pile loop.
After the insulation detection is finished, the processing equipment can separate the insulation detection from the strong current loop in a physical mode, input the discharge loop to discharge the voltage of the charging pile, and simultaneously can start to periodically send communication handshake messages.
S503: the relay switches K6, K7 are closed.
By closing K6, K7, the processing device can pass the charging voltage of the charging post side into the vehicle terminal.
S504: the battery management system determines whether a connection confirmation signal is detected.
When the battery management system BMS detects the connection confirmation signal CC, which indicates that the connection between the charging pile and the vehicle terminal has been completed, the BMS may start self-checking the vehicle terminal.
S505: and the battery management system receives a power-on permission signal sent by the whole vehicle control unit, and closes the relay switch K2.
After initialization, processing equipment can continuously send a power-on request to a whole vehicle control unit VCU, BMS can send a gun inserting signal to the VCU and DCDC, after a calibration time TBD, the BMS can send a power-on permission signal, and after the BMS receives the power-on permission signal, if judging that the BMS meets the power-on condition, the BMS can close K2.
S506: after the calibration time, the relay switches K3 and K5 are closed to precharge accessories such as a motor, a direct current-direct current converter, an air conditioner, the inside of a battery pack and the like.
S507: when the bus voltage is higher than the preset voltage, the relay switch K1 is closed.
When the bus voltage is higher than the preset voltage, the pre-charging is finished, and the relay switch K1 can be closed to prepare for charging.
S508: the relay switch K2 is turned off.
S509: and closing a relay switch K4 to charge.
Because the pre-charging is performed before the charging, the voltage at the two ends of the capacitor X cannot generate larger pressure difference due to the introduction of the charging voltage; meanwhile, the loops where K2, K5 and K7 are located are firstly connected, so that forward voltage difference can be generated on the power supply side, interference on charging signals is reduced, and meanwhile the damage probability of elements is reduced.
Based on the foregoing embodiment of the present application, the embodiment of the present application further provides a charging processing device, referring to fig. 6, fig. 6 is a block diagram of a charging processing device 600 according to the embodiment of the present application, where the device includes a first closing unit 601 and a second closing unit 602:
the first closing unit 601 is configured to close a first relay switch, a second relay switch, and a third relay switch, where the first relay switch is used to perform pre-charging treatment on a vehicle terminal, the second relay switch is used to switch on a power negative electrode, and the third relay switch is used to switch on a charging pile negative electrode;
the second closing unit 602 is configured to, if it is determined that the first relay switch, the second relay switch, and the third relay switch are in a closed state, and the charging pile and the power supply can provide a charging voltage, close a fourth relay switch, so that the charging pile can charge the vehicle terminal through the power supply, and the fourth relay switch is configured to switch on an anode of the power supply.
In one possible implementation, the apparatus 600 further includes a third closing unit:
the third closing unit is used for closing a fifth relay switch, the fifth relay switch is used for switching on a battery cathode of the vehicle terminal, and the fifth relay switch and the first relay switch form a pre-charging loop for pre-charging a charging capacitor of the vehicle terminal, so that the difference value between the voltages at two sides of the charging capacitor and the charging voltage corresponding to the charging pile is reduced to be within a preset range.
In one possible implementation manner, the first closing unit 601 is specifically configured to:
closing the third relay switch and a sixth relay switch, wherein the sixth relay switch is used for switching on the anode of the charging pile so that the charging pile can transmit charging voltage to the vehicle terminal;
closing the first relay switch to enable the vehicle terminal to be pre-charged;
and closing the second relay switch, so that under the action of the charging voltage, the current in the vehicle terminal can flow in a passage formed by the first relay switch, the second relay switch and the third relay switch.
In one possible implementation, the apparatus 600 further includes a detection unit and a bleed unit:
the detection unit is used for performing insulation detection if the charging gun of the charging pile is determined to be connected with the vehicle terminal;
and the discharging unit is used for discharging the voltage of the charging pile and sending a communication handshake message to the vehicle terminal if the voltage of the charging pile is detected by the insulation detection, wherein the communication handshake message is used for indicating the vehicle terminal to execute a charging preparation flow.
In a possible implementation manner, the apparatus 600 further includes a sending unit and an executing unit:
the sending unit is used for sending a self-checking signal to the vehicle terminal, and the self-checking signal is used for indicating the vehicle terminal to perform self-checking through a battery management system.
And the execution unit is used for executing the action of closing the first relay switch if the self-checking is passed.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware related to program instructions, where the above program may be stored in a computer readable storage medium, and when the program is executed, the program performs steps including the above method embodiments; and the aforementioned storage medium may be at least one of the following media: read-only memory (ROM), RAM, magnetic disk or optical disk, etc., which can store program codes.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment is mainly described in a different point from other embodiments. In particular, for the apparatus and system embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, with reference to the description of the method embodiments in part. The apparatus and system embodiments described above are merely illustrative, in which elements illustrated as separate elements may or may not be physically separate, and elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present application without undue burden.
The foregoing is only one specific embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be included in the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims (8)
1. A method of charging treatment, the method comprising:
closing a first relay switch, a second relay switch and a third relay switch, wherein the first relay switch is used for pre-charging a vehicle terminal, the second relay switch is used for switching on a power supply negative electrode, and the third relay switch is used for switching on a charging pile negative electrode;
if the first relay switch, the second relay switch and the third relay switch are confirmed to be in a closed state, the charging pile and the power supply can provide charging voltage, a fourth relay switch is closed, so that the charging pile can charge the vehicle terminal through the power supply, and the fourth relay switch is used for switching on the positive electrode of the power supply;
the closing of the first, second and third relay switches specifically includes:
closing the third relay switch and a sixth relay switch, wherein the sixth relay switch is used for switching on the anode of the charging pile so that the charging pile can transmit charging voltage to the vehicle terminal;
closing the first relay switch to enable the vehicle terminal to be pre-charged;
and closing the second relay switch, so that under the action of the charging voltage, the current in the vehicle terminal can flow in a passage formed by the first relay switch, the second relay switch and the third relay switch.
2. The method of claim 1, wherein before the first, second, and third relay switches are confirmed to be in a closed state and the charging post and the power source are capable of providing a charging voltage, closing a fourth relay switch, the method further comprises:
and closing a fifth relay switch, wherein the fifth relay switch is used for switching on a battery cathode of the vehicle terminal, and the fifth relay switch and the first relay switch form a pre-charging loop for pre-charging a charging capacitor of the vehicle terminal, so that the difference value between the voltages at two sides of the charging capacitor and the charging voltage corresponding to the charging pile is reduced to be within a preset range.
3. The method of claim 1, wherein prior to the closing of the first, second, and third relay switches, the method further comprises:
if the charging gun of the charging pile is determined to be connected with the vehicle terminal, performing insulation detection;
and if the voltage of the charging pile is discharged through the insulation detection, sending a communication handshake message to the vehicle terminal, wherein the communication handshake message is used for indicating the vehicle terminal to execute a charging preparation flow.
4. The method of claim 1, wherein prior to said closing said first relay switch, said method further comprises:
the method comprises the steps of sending a self-checking signal to the vehicle terminal, wherein the self-checking signal is used for indicating the vehicle terminal to perform self-checking through a battery management system;
and if the self-checking is passed, executing the action of closing the first relay switch.
5. A charging treatment device, characterized in that the device comprises a first closing unit and a second closing unit:
the first closing unit is used for closing a first relay switch, a second relay switch and a third relay switch, the first relay switch is used for carrying out pre-charging treatment on a vehicle terminal, the second relay switch is used for switching on a power supply negative electrode, and the third relay switch is used for switching on a charging pile negative electrode;
the second closing unit is configured to, if it is determined that the first relay switch, the second relay switch, and the third relay switch are in a closed state, and the charging pile and the power supply are capable of providing a charging voltage, close a fourth relay switch, so that the charging pile can charge the vehicle terminal through the power supply, and the fourth relay switch is used for switching on an anode of the power supply;
the first closing unit is specifically configured to:
closing the third relay switch and a sixth relay switch, wherein the sixth relay switch is used for switching on the anode of the charging pile so that the charging pile can transmit charging voltage to the vehicle terminal;
closing the first relay switch to enable the vehicle terminal to be pre-charged;
and closing the second relay switch, so that under the action of the charging voltage, the current in the vehicle terminal can flow in a passage formed by the first relay switch, the second relay switch and the third relay switch.
6. The device according to claim 5, further comprising a third closing unit:
the third closing unit is used for closing a fifth relay switch, the fifth relay switch is used for switching on a battery cathode of the vehicle terminal, and the fifth relay switch and the first relay switch form a pre-charging loop for pre-charging a charging capacitor of the vehicle terminal, so that the difference value between the voltages at two sides of the charging capacitor and the charging voltage corresponding to the charging pile is reduced to be within a preset range.
7. The apparatus of claim 5, further comprising a detection unit and a bleed unit:
the detection unit is used for performing insulation detection if the charging gun of the charging pile is determined to be connected with the vehicle terminal;
and the discharging unit is used for discharging the voltage of the charging pile and sending a communication handshake message to the vehicle terminal if the voltage of the charging pile is detected by the insulation detection, wherein the communication handshake message is used for indicating the vehicle terminal to execute a charging preparation flow.
8. The apparatus of claim 5, further comprising a transmitting unit and an executing unit:
the sending unit is used for sending a self-checking signal to the vehicle terminal, wherein the self-checking signal is used for indicating the vehicle terminal to perform self-checking through a battery management system;
and the execution unit is used for executing the action of closing the first relay switch if the self-checking is passed.
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