CN111002833A - Combinable three-in-one control system, control method and electric vehicle - Google Patents
Combinable three-in-one control system, control method and electric vehicle Download PDFInfo
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- CN111002833A CN111002833A CN201911355942.0A CN201911355942A CN111002833A CN 111002833 A CN111002833 A CN 111002833A CN 201911355942 A CN201911355942 A CN 201911355942A CN 111002833 A CN111002833 A CN 111002833A
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/14—Preventing excessive discharging
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The combinable three-in-one control system, the combinable three-in-one control method and the electric vehicle comprise three-in-one controllers, wherein each three-in-one controller comprises a DCDC controller, an oil pump controller and an air pump controller, and a positive terminal relay of a power battery is connected with the three-in-one controllers through a three-in-one high-voltage relay and two adjustable relays; wherein, the output of positive end relay is connected trinity high voltage relay all the way, and another sweetgum fruit is through first adjustable relay connection DCDC controller, and air pump controller and oil pump controller are connected respectively to trinity high voltage relay output two tunnel, still is equipped with the adjustable relay of second between trinity high voltage relay and the first adjustable relay, makes up into different systems through controlling trinity high voltage relay and two adjustable relays. According to the system, an oil pump, an air pump and a DCDC high-voltage control mode can be selected according to the requirements of the whole vehicle, and the energy consumption of the three-in-one system is reduced and the over-discharge of the storage battery is prevented through different control logics.
Description
Technical Field
The invention belongs to the technical field of vehicles, and particularly relates to a combinable three-in-one control system, a combinable three-in-one control method and an electric vehicle.
Background
According to the national standard, the three-level fault of the pure electric passenger car is the highest-level fault. The three-level faults are generally classified into a battery system three-level fault and a driving system (MCU, BMS, etc.) three-level fault. When the key is in an ACC or an ON gear and a non-battery system three-level fault occurs, all loads at the rear end are disconnected, the power battery end is kept closed, at the moment, under the condition that the key is not related to OFF, the low voltage of a controller (VCU, BMS, MCU and the like) still works, if DCDC stops working, the low voltage load is supplied with power by a storage battery, the over-discharge phenomenon of the storage battery can occur, and in the traditional working mode, if only the high voltage ON the battery and the DCDC is needed and other loads still work, the system energy consumption is high, or in the charging process, only the DCDC is needed to provide the low voltage, and other loads still work, the system energy consumption is high. The existing whole vehicle control system often has the condition of high-voltage relay adhesion, and the high-voltage power supply safety and the charging safety of the vehicle during the running of the electric vehicle are seriously influenced.
Disclosure of Invention
The invention aims to provide a combinable three-in-one control system to solve the technical problems of over-discharge of a storage battery and high energy consumption caused by three-level faults of a traditional electrical system.
In order to achieve the above purpose, the specific technical scheme of the combinable three-in-one control system of the invention is as follows:
a combinable three-in-one control system comprises a three-in-one controller, wherein the three-in-one controller comprises a DCDC controller, an oil pump controller and an air pump controller, and a positive end relay of a power battery is connected with the three-in-one controller through a three-in-one high-voltage relay and two adjustable relays; wherein, positive end relay's output is connected trinity high voltage relay all the way, and another sweetgum fruit is through first adjustable relay connection DCDC controller, and trinity high voltage relay exports two tunnel, connects air pump controller and oil pump controller respectively, still is equipped with the adjustable relay of second between trinity high voltage relay and the first adjustable relay, makes up into different systems through controlling two adjustable relays.
Further, still be equipped with the preliminary filling relay in the trinity controller for control trinity high-voltage relay does not receive the adhesion.
Further, the positive end relay of battery power is arranged in the BMS main control box and is controlled by the BMS.
Further, trinity high voltage relay and first adjustable relay, the setting of second adjustable relay are in high voltage distribution box PDU, by vehicle control unit VCU control.
Furthermore, the first adjustable relay is controlled to be closed, the second adjustable relay is controlled to be opened to form a first control mode, energy conservation is achieved, over-discharge of the storage battery is prevented, the first adjustable relay is controlled to be opened to form a second control mode through closing of the second adjustable relay, and the same control logic of the DCDC, the oil pump and the air pump is achieved.
The invention also provides an electric vehicle which comprises the combinable three-in-one control system.
The invention also provides a combinable three-in-one control method, and the control logic specifically comprises the following steps:
when the driving system has three-level faults and the vehicle speed is 0, when the vehicle is in a first control mode, the three-in-one high-voltage relay is disconnected, the high voltage of the oil pump and the air pump is disconnected, the DCDC still works at the moment, and the load is also supplied with power while the low-voltage storage battery is charged; when the key is turned to the OFF gear, the first adjustable relay is disconnected, the DCDC stops working,
when the control mode is the second control mode, the three-in-one high-voltage relay does not act, the oil pump, the air pump and the DCDC work at the moment, the oil pump and the air pump are disconnected at high voltage, the DCDC still works at the moment, and the load is also supplied with power while the low-voltage storage battery is charged; when the key is turned to the OFF gear, the second adjustable relay is switched OFF, then the three-in-one high-voltage relay is switched OFF, at the moment, the oil pump, the air pump and the DCDC stop working,
and after all the load high voltages are disconnected, finally disconnecting the battery power positive terminal relay by the BMS, and completing the high-voltage power-off of the whole vehicle.
Further, when the battery system has three-level faults and the vehicle speed is 0, and when the vehicle is in the first control mode, the three-in-one high-voltage relay is disconnected, the high voltage of the oil pump and the air pump is disconnected, the DCDC still works at the moment, the load is also supplied with power while the low-voltage storage battery is charged,
when the control mode is the second control mode, the second adjustable relay is switched off, then the three-in-one high-voltage relay is switched off, and the oil pump, the air pump and the DCDC stop working,
and after all the load high voltages are disconnected, finally disconnecting the battery power positive terminal relay by the BMS, and completing the high-voltage power-off of the whole vehicle.
Further, the method also comprises the step of reducing power to operate when the first-stage fault and the second-stage fault occur.
Further, still include when carrying out the preliminary filling, the trinity controller sends the preliminary filling relay real-time status, and when ACC or ON shelves were twisted to the key, when detecting the preliminary filling relay for the off-state, closed trinity high voltage relay simultaneously for trinity high voltage relay does not receive the adhesion.
The combined three-in-one control system, the control method and the electric vehicle have the following advantages that:
(1) the invention designs a combinable three-in-one electrical system, and can select an oil pump, an air pump and a DCDC high-voltage control mode according to the requirements of the whole vehicle, thereby achieving the purposes of reducing the energy consumption of the three-in-one system and preventing the over-discharge of a storage battery through different control logics;
(2) the invention designs anti-adhesion control logic of the three-in-one high-voltage relay, controls the high-voltage electrification of the three-in-one system by judging the closing state of the relay in the three-in-one controller, and protects the three-in-one high-voltage relay from adhesion.
Drawings
FIG. 1 is a schematic diagram of a combinable three-in-one control system according to the present invention;
FIG. 2 is a schematic diagram of the system of FIG. 1 combined by controls K1, K2 according to the present invention;
FIG. 3 is a schematic diagram of the system of FIG. 1 combined by controls K1, K3 according to the present invention;
FIG. 4 is a flow chart of the pre-charging operation of the tri-in-one system of the present invention;
fig. 5 is a flow chart of the operation of the three-in-one system during the fault of the invention.
Detailed Description
For better understanding of the objects, structure and functions of the present invention, a combined three-in-one control system and method of the present invention will be described in detail with reference to the accompanying drawings.
An air pump: the pneumatic brake is used for inflating tires and braking mechanical brakes.
An oil pump: for steering wheel assisted power steering.
DCDC: is used for supplying power to the whole vehicle at low voltage. The low voltage of the whole vehicle is generally supplied by DCDC or a storage battery, and when the DCDC is not in operation, the storage battery supplies power; when the DCDC works, the DCDC supplies power to the whole vehicle at low voltage and charges the storage battery at the same time.
K0: battery power positive terminal relay (in BMS main control box, controlled by BMS)
K1: three-in-one high-voltage relay (in PDU, controlled by VCU)
First adjustable relay K3, second adjustable relay K2: adjustable relay (placed in PDU, controlled by VCU)
K4, K5: three-in-one internal pre-charging part relay (on the three-in-one internal control panel, controlled by the three-in-one controller)
As shown in fig. 1, the combinable three-in-one control system of the present invention comprises a three-in-one controller, wherein the three-in-one controller comprises a DCDC controller, an oil pump controller, and an air pump controller, and a positive terminal relay K0 of the power battery is connected to the three-in-one controller through a three-in-one high voltage relay K1 and two adjustable relays; wherein, the trinity high-voltage relay K1 is connected all the way to positive end relay K0's output, another sweetgum fruit is through first adjustable relay K3 connection DCDC controller, trinity high-voltage relay K1 output is two the tunnel, connect air pump controller and oil pump controller respectively, still be equipped with second adjustable relay K2 between trinity high-voltage relay K1 and the first adjustable relay K3, make up into different systems through controlling trinity high-voltage relay K1 and two adjustable relays.
The invention forms a first control mode by controlling the three-in-one high-voltage relay K1 and the first adjustable relay K3, except the DCDC body fault, as long as the key is at ACC or ON gear, the DCDC has high voltage and is in working state (the DCDC charges the storage battery and supplies power to the low-voltage load at the same time, only the DCDC works at ACC gear, the DCDC works at ON gear, and can control the oil pump, the air pump to have high voltage and working state at the same time); when the key is in the OFF gear, the DCDC, the oil pump and the air pump stop working and the high pressure is cut OFF, so that the energy is saved and the over-discharge of the storage battery is prevented, as shown in figure 3.
The invention realizes the same control logics of the DCDC, the oil pump and the air pump by controlling the three-in-one high-voltage relay K1 and the second adjustable relay K2 to form a second control mode, as shown in figure 2.
The invention can combine 2 different systems by flexibly controlling K1, K2 and K3, achieves the purposes of saving energy and preventing the over-discharge of the storage battery, and can be selectively controlled according to the actual application requirements.
The control logic of the combinable three-in-one control system is as follows: when the whole vehicle system has a fault, the execution sequence is shown in fig. 5:
when the first-stage fault and the second-stage fault occur, reducing power and operating;
when a three-level fault occurs in a driving system and the vehicle speed is 0, under the condition that the PDU mode is 1, controlling K2 and K3 to form a first control mode, firstly disconnecting a K1 relay (when the PDU mode is not 1, the relay K1 does not act, and at the moment, an oil pump, an air pump and a DCDC are all working), disconnecting the high voltage of the oil pump and the air pump, still working the DCDC at the moment, and supplying power to a load (BMS and MCU) while charging a low-voltage storage battery; when the key is turned to the OFF gear, the K3 relay is disconnected, the DCDC stops working (when the PDU mode is not 1, the K2 is disconnected firstly, then the K1 is disconnected, at the moment, the oil pump, the air pump and the DCDC stop working), and when all the load high voltages are disconnected, the BMS finally disconnects the K0 relay, so that the whole vehicle is powered OFF at high voltage.
When the battery system has a three-level fault and the vehicle speed is 0, under the condition that the PDU mode is 1, the K1 relay is disconnected, the high voltage of the oil pump and the air pump is disconnected, the DCDC still works at the moment, and the load (BMS and MCU) is also supplied with power while the low-voltage storage battery is charged; when the PDU mode is not 1, firstly cutting off K2, then cutting off K1, at the moment, stopping the work of the oil pump, the air pump and the DCDC, and finally cutting off the K0 relay by the BMS after all the load high voltages are cut off, so that the whole vehicle is powered off at high voltage.
At present, in the aspect of vehicle control, the K1 relay can be stuck frequently. The three-in-one system of some motorcycle types is low-voltage normal power, and the low voltage of the whole motorcycle can be powered off only when the manual low-voltage switch is switched off. Under normal conditions, when the key is turned OFF to an OFF gear, K1 is firstly disconnected, then K5 is disconnected (K4 is disconnected after the pre-charging is completed), and finally K0 is disconnected; when the key is screwed to the ON gear again, the K0 is closed firstly, then the K1 is closed, then the K4 is closed for pre-charging, and finally the K5 is closed.
When the key closes the OFF shelves and screws to ACC or ON shelves fast again, because the discharge time is too short, when K4 relay has not disconnected yet (general K4 disconnection condition is all less than 400V for detecting trinity capacitance voltage, 400V is for calculating according to motorcycle type and battery monomer voltage, some producers can set up littleer), whole return circuit this moment only K1 is in the OFF-state, K1 relay can be closed immediately after detecting the key signal again, at this moment, K1 does not take the preliminary filling, the both ends pressure differential can be up to 200V or even higher, impedance is very little in the return circuit, instantaneous very big current of production, K1 carries the actuation, the adhesion appears easily this moment, big current also can influence the electric system of connection.
In order to solve the quick power-ON and power-off problem, carry out logic optimization control, trinity controller need send K5 real-time status, when the key was twisted to ACC or ON shelves, still need detect K4 and K5 relay simultaneously and just can close K1 when being off-state, effectively protect K1 relay and relevant electrical system.
Specifically, when the key is in the ACC gear or charging, the execution sequence is as shown in fig. 4:
when the key is screwed to an ACC gear or charged, the VCU is electrified in a delayed mode, and after the VCU is free of fault in self-detection, the BMS, the MCU, the three-in-one first-class low-voltage electrification are controlled; if the low-voltage self-test of each system has no fault, the VCU requests K0 to be closed, and the BMS controls K0 to be closed; the VCU receives the BMS high-voltage self-checking no fault and the states of the K4 and K5 relays fed back by the DCDC controller are in an open non-adhesion state, otherwise, the corresponding fault is reported; then the VCU sends a PDU control mode according to the vehicle type application condition, if the mode is 1, the K3 relay is controlled to be sucked, and when the DCDC controller detects that the voltage of a point B is greater than that of the U0 (the voltage deviation of a general battery is about 30V), the DCDC controller controls the K4 to be closed, otherwise, the K3 disconnection fault is reported; if the control mode is not 1, the VCU controls the K2 to be closed, then the K1 is closed in a delayed mode, when the DCDC controller system detects that the voltage of the point A is greater than the voltage of the U0, the DCDC controller controls the K4 to be closed, and otherwise, the K2 or the disconnection fault is reported; and (4) after K4 is closed, delaying ts, if the DCDC pre-charging is finished, controlling the DCDC to close K5 and delay to open K4, otherwise, reporting a pre-charging failure fault, and if the fault occurs, entering a fault processing mode, so far, finishing the whole pre-charging process.
Under the condition that the key is directly turned ON: when the key is directly screwed to the ON gear, the ACC gear pre-charging logic is executed firstly, and then the oil pump and air pump pre-charging logic is executed (the oil pump and air pump pre-charging logic is the same as the DCDC).
The charging logic is executed preferentially by the charging signal, and then the key position logic is executed according to the key signal.
The system can be expanded by adding a high-voltage control panel PDU, one end of the high-voltage control panel is connected with a battery power positive terminal relay, the other end of the high-voltage control panel is connected with a motor controller, and high-voltage pre-charging of the motor controller is added.
The invention combines 2 different systems by flexibly controlling K1, K2 and K3, realizes the three-in-one electric system with adjustable modes, achieves the purposes of saving energy and preventing the over-discharge of the storage battery, can be selectively controlled according to the actual application requirements during use, can effectively prevent the over-discharge of the storage battery, prolongs the service life of the storage battery, and simultaneously reduces the energy consumption of the three-in-one system.
According to the invention, the pre-charging protection logic is added in the three-in-one control system, and the high voltage on the three-in-one system is controlled by judging the closing state of the relay in the three-in-one controller, so that the three-in-one high-voltage relay is protected from being adhered.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A combinable three-in-one control system is characterized by comprising a three-in-one controller, wherein the three-in-one controller comprises a DCDC controller, an oil pump controller and an air pump controller, and a positive terminal relay of a power battery is connected with the three-in-one controller through a three-in-one high-voltage relay and two adjustable relays; wherein, positive end relay's output is connected trinity high voltage relay all the way, and another sweetgum fruit is through first adjustable relay connection DCDC controller, and trinity high voltage relay exports two tunnel, connects air pump controller and oil pump controller respectively, still is equipped with the adjustable relay of second between trinity high voltage relay and the first adjustable relay, makes up into different systems through controlling two adjustable relays.
2. The system of claim 1, wherein a pre-charge relay is further disposed in the triad controller for controlling the triad high voltage relay to prevent adhesion.
3. The system of claim 1, wherein the battery powered positive side relay is located in the BMS host control box and controlled by the BMS.
4. The combinable tri-in-one control system of claim 1 wherein the tri-in-one high voltage relay and the first and second adjustable relays are disposed in a high voltage distribution box PDU and controlled by a vehicle control unit VCU.
5. The system of claim 1, wherein the first relay is controlled to be closed, the second relay is controlled to be opened to form a first control mode, thereby saving energy and preventing the over-discharge of the battery, and the second relay is controlled to be closed, thereby forming a second control mode, thereby realizing the same control logic of the DCDC, the oil pump and the air pump.
6. An electric vehicle comprising a combinable three-in-one control system as claimed in any one of claims 1 to 5.
7. A combinable three-in-one control method is characterized in that a control logic specifically comprises the following steps:
when the driving system has three-level faults and the vehicle speed is 0, when the vehicle is in a first control mode, the three-in-one high-voltage relay is disconnected, the high voltage of the oil pump and the air pump is disconnected, the DCDC still works at the moment, and the load is also supplied with power while the low-voltage storage battery is charged; when the key is turned to the OFF gear, the first adjustable relay is disconnected, the DCDC stops working,
when the control mode is the second control mode, the three-in-one high-voltage relay does not act, the oil pump, the air pump and the DCDC work at the moment, the oil pump and the air pump are disconnected at high voltage, the DCDC still works at the moment, and the load is also supplied with power while the low-voltage storage battery is charged; when the key is turned to the OFF gear, the second adjustable relay is switched OFF, then the three-in-one high-voltage relay is switched OFF, at the moment, the oil pump, the air pump and the DCDC stop working,
and after all the load high voltages are disconnected, finally disconnecting the battery power positive terminal relay by the BMS, and completing the high-voltage power-off of the whole vehicle.
8. The method as claimed in claim 7, further comprising, when the battery system has a three-level fault and the vehicle speed is 0, when the first control mode is selected, first disconnecting the three-in-one high voltage relay, disconnecting the oil pump and the air pump at high voltage, and then operating the DCDC to charge the low voltage battery and supply power to the load,
when the control mode is the second control mode, the second adjustable relay is switched off, then the three-in-one high-voltage relay is switched off, and the oil pump, the air pump and the DCDC stop working,
and after all the load high voltages are disconnected, finally disconnecting the battery power positive terminal relay by the BMS, and completing the high-voltage power-off of the whole vehicle.
9. The method as claimed in claim 7, further comprising reducing power when the primary and secondary faults occur.
10. The method as claimed in claim 7, further comprising the step of sending a pre-charge relay real-time status by the tri-in-one controller during pre-charging, turning ON the key to the ACC or ON gear, and closing the tri-in-one high voltage relay when detecting that the pre-charge relay is in an off state, so that the tri-in-one high voltage relay is not stuck.
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| CN201911355942.0A CN111002833A (en) | 2019-12-25 | 2019-12-25 | Combinable three-in-one control system, control method and electric vehicle |
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| CN201911355942.0A CN111002833A (en) | 2019-12-25 | 2019-12-25 | Combinable three-in-one control system, control method and electric vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111717029A (en) * | 2020-06-08 | 2020-09-29 | 北京汽车股份有限公司 | Limp-home mode low-voltage load power supply control method and system and hybrid electric vehicle |
| CN112046421A (en) * | 2020-08-13 | 2020-12-08 | 珠海格力电器股份有限公司 | Power-on control device and method of all-in-one controller and automobile |
-
2019
- 2019-12-25 CN CN201911355942.0A patent/CN111002833A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111717029A (en) * | 2020-06-08 | 2020-09-29 | 北京汽车股份有限公司 | Limp-home mode low-voltage load power supply control method and system and hybrid electric vehicle |
| CN112046421A (en) * | 2020-08-13 | 2020-12-08 | 珠海格力电器股份有限公司 | Power-on control device and method of all-in-one controller and automobile |
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