CN111347891B - Electric automobile, driving device, driving system and power supply control method thereof - Google Patents
Electric automobile, driving device, driving system and power supply control method thereof Download PDFInfo
- Publication number
- CN111347891B CN111347891B CN201811571397.4A CN201811571397A CN111347891B CN 111347891 B CN111347891 B CN 111347891B CN 201811571397 A CN201811571397 A CN 201811571397A CN 111347891 B CN111347891 B CN 111347891B
- Authority
- CN
- China
- Prior art keywords
- power supply
- control unit
- control switch
- positive
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000004891 communication Methods 0.000 claims abstract description 12
- 238000005070 sampling Methods 0.000 claims abstract description 9
- 239000013641 positive control Substances 0.000 claims description 19
- 239000013642 negative control Substances 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 230000001934 delay Effects 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/12—Speed
-
- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- 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
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to an electric automobile, a driving device, a driving system and a power supply control method thereof, wherein the driving device comprises a first control unit, a second control unit and a power supply loop; the power supply loop comprises a positive power supply line and a negative power supply line, one end of the positive power supply line is used for being connected with the positive electrode of the power battery, the other end of the positive power supply line is used for being connected with the positive electrode of the motor controller, one end of the negative power supply line is used for being connected with the negative electrode of the power battery, and the other end of the negative power supply line is used for being connected with the negative electrode of the motor controller; the positive power supply line and/or the negative power supply line are/is connected with a power supply control switch in series, and the first control unit and the second control unit are both in control connection with the power supply control switch; the second control unit is connected with an emergency mode switch in a sampling way, and the first control unit is connected with the two control units in a communication way. The invention can effectively avoid the abnormal disconnection of the power supply loop caused by the wiring harness problem or vehicle vibration, and improves the power supply reliability of the power supply loop.
Description
Technical Field
The invention relates to an electric automobile, a driving device and a driving system thereof and a power supply control method, and belongs to the technical field of electric automobile control.
Background
The energy source of the electric automobile is a power battery, and the power battery can supply power for the motor controller through a power supply loop. The contactor is connected in series in the power supply loop, and the power supply loop is switched on and off by controlling the contactor. The existing vehicle adopts a control unit to realize the control of the contactor, and the power supply loop can be cut off in emergency when in failure.
However, in the existing power supply loop working process, abnormal disconnection of the power supply loop is caused by harness problems or vehicle vibration, so that the power supply reliability is poor. In addition, under the condition that the power battery fails and potential personal safety hazards possibly exist, a decision needs to be made between protecting the battery and guaranteeing personal safety at the moment, if a safe place can not be found for parking in a short time under a high-speed working condition, if a power supply loop is disconnected, the vehicle can lose power, and serious safety accidents are caused.
Disclosure of Invention
The invention aims to provide an electric automobile, a driving device and a driving system thereof, which are used for solving the problem of poor power supply reliability of a power supply loop of a motor controller of the existing electric automobile.
The invention provides a driving device of an electric automobile, which aims to solve the problem of poor power supply reliability of a power supply loop of an existing electric automobile motor controller and comprises a first control unit, a second control unit and a power supply loop; the power supply circuit comprises a positive power supply circuit and a negative power supply circuit, one end of the positive power supply circuit is used for being connected with the positive electrode of the power battery, the other end of the positive power supply circuit is used for being connected with the positive electrode of the motor controller, one end of the negative power supply circuit is used for being connected with the negative electrode of the power battery, and the other end of the negative power supply circuit is used for being connected with the negative electrode of the motor controller; the positive power supply line and/or the negative power supply line are/is connected with a power supply control switch in series, and the first control unit and the second control unit are both in control connection with the power supply control switch; the second control unit is connected with an emergency mode switch in a sampling mode, and the first control unit is connected with the second control unit in a communication mode.
The invention further provides a driving system of the electric automobile, which comprises a power battery, a motor controller and a driving device, wherein the driving device comprises a first control unit, a second control unit and a power supply loop; the power supply circuit comprises a positive power supply circuit and a negative power supply circuit, one end of the positive power supply circuit is connected with the positive electrode of the power battery, the other end of the positive power supply circuit is connected with the positive electrode of the motor controller, one end of the negative power supply circuit is connected with the negative electrode of the power battery, and the other end of the negative power supply circuit is connected with the negative electrode of the motor controller; the positive power supply line and/or the negative power supply line are/is connected with a power supply control switch in series, and the first control unit and the second control unit are both in control connection with the power supply control switch; the second control unit is connected with an emergency mode switch in a sampling mode, and the first control unit is connected with the second control unit in a communication mode.
The invention further provides an electric automobile, which aims to solve the problem of poor power supply reliability of a power supply loop of an existing electric automobile motor controller, and comprises an electric automobile body and a driving system, wherein the driving system comprises a power battery, a motor controller and a driving device, and the driving device comprises a first control unit, a second control unit and a power supply loop; the power supply circuit comprises a positive power supply circuit and a negative power supply circuit, one end of the positive power supply circuit is connected with the positive electrode of the power battery, the other end of the positive power supply circuit is connected with the positive electrode of the motor controller, one end of the negative power supply circuit is connected with the negative electrode of the power battery, and the other end of the negative power supply circuit is connected with the negative electrode of the motor controller; the positive power supply line and/or the negative power supply line are/is connected with a power supply control switch in series, and the first control unit and the second control unit are both in control connection with the power supply control switch; the second control unit is connected with an emergency mode switch in a sampling mode, and the first control unit is connected with the second control unit in a communication mode.
The beneficial effects of the invention are as follows: in the process that the power battery supplies power to the motor controller through the power supply loop, the first control unit and the second control unit are adopted to simultaneously control the power supply control switch in the power supply loop, so that when one control unit fails in control, the other control unit can still control the power supply control switch to be closed, the phenomenon that the power supply loop is disconnected abnormally due to the wire harness problem or vehicle vibration can be effectively avoided, and the power supply reliability of the power supply loop is improved.
In order to realize on-off control of a power supply loop, the power supply control switch comprises a total positive control switch and a total negative control switch, wherein the total positive control switch is connected with the positive power supply line in series, and the total negative control switch is connected with the negative power supply line in series.
In order to realize the pre-charging function of the power supply loop, the device, the system and the automobile are further improved, two ends of the main positive control switch are connected with pre-charging branches in parallel, a pre-charging resistor and a pre-charging control switch are connected in series in the pre-charging branches, and the first control unit is connected with the pre-charging control switch in a control mode.
As a further improvement of the device, the system and the automobile, in order to realize the speed detection to make corresponding judgment, the device further comprises a speed detection unit, and the second control unit is connected with the speed detection unit in a sampling way.
The invention further provides a power supply control method of the electric automobile, which aims to solve the problem that when a power battery fails and can not be parked in a short time, a power supply loop of a motor controller of the electric automobile is disconnected to cause a safety accident caused by the fact that the vehicle loses power, and comprises the following steps:
when a non-thermal failure fault occurs in the power battery in the running process of the electric automobile, judging whether the current speed is greater than a set threshold value or not;
If the current vehicle speed is greater than the set threshold, a related alarm signal is output to a driver, meanwhile, the second control unit detects whether an emergency mode switch signal is received within a first set time, and if the emergency mode switch signal is received, the second control unit controls the power supply control switch to keep on, and meanwhile, sends an instruction of not allowing the power supply control switch to be disconnected to the first control unit.
The beneficial effects of the invention are as follows: when the power battery fails in a non-thermal failure way and the current vehicle speed is high, if the driver cannot stop reliably in a short time, the driver can send out an emergency mode switch signal, so that the second control unit controls the power supply control switch to keep on, and meanwhile sends an instruction for not allowing the power supply control switch to be disconnected to the first control unit, the power supply control switch in the power supply loop can be prevented from being disconnected, the power battery is ensured to continuously supply power to the motor controller through the power supply loop, and the problem that safety accidents are caused by the fact that the vehicle loses power due to the disconnection of the power supply loop is effectively avoided.
As a further improvement of the method, in order to control the disconnection of the power supply loop to prevent the expansion of an accident, if the current vehicle speed is not greater than the set threshold, the second control unit outputs a relevant warning signal to the driver, delays for a second set time, and then the second control unit controls the disconnection of the power supply control switch and sends an instruction for allowing the disconnection of the power supply control switch to the first control unit.
As a further improvement of the method, in order to control the disconnection of the power supply circuit to prevent the expansion of an accident, when a thermal failure fault occurs in the power battery during the operation of the electric vehicle, the first control unit and the second control unit both output instructions to disconnect the power supply control switch.
As a further improvement of the method, in order to reliably control the disconnection of the power supply loop in case the driver does not need to turn on the emergency mode, if the second control unit does not receive the emergency mode switch signal within the first set time, the second control unit delays the second set time, and then controls the disconnection of the power supply control switch, and sends an instruction for allowing the disconnection of the power supply control switch to the first control unit.
Drawings
Fig. 1 is a schematic circuit diagram of a driving device of an electric vehicle according to the present invention;
FIG. 2 is a flow chart of a power supply control method of the electric vehicle of the present invention;
In the accompanying drawings: the power battery is 1, the maintenance switch is 2, the second control unit is 3, the total negative contactor is 4, the first control unit is 5, the motor controller is 6, the fuse is 7, the pre-charging contactor is 8, the total positive contactor is 9, the pre-charging resistor is 10, and the emergency mode switch is 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Drive device embodiment of electric automobile:
The present embodiment provides a driving device (may be abbreviated as a driving device) of an electric vehicle, which includes a first control unit 5, a second control unit 3, and a power supply circuit. The power supply loop comprises a positive power supply line and a negative power supply line, one end of the positive power supply line is used for being connected with the positive electrode of the power battery 1, the other end of the positive power supply line is used for being connected with the positive electrode of the motor controller 6, one end of the negative power supply line is used for being connected with the negative electrode of the power battery 1, and the other end of the negative power supply line is used for being connected with the negative electrode of the motor controller 6. The positive power supply line and the negative power supply line are connected in series with a power supply control switch, and the first control unit 5 and the second control unit 3 are both in control connection with the power supply control switch. In order to receive the emergency mode switch signal issued by the driver, the second control unit 3 is also connected with an emergency mode switch 11 in a sampling way, and the first control unit 5 is connected with the second control unit 3 in a communication way.
Wherein, in order to realize the communication with the motor controller 6, the first control unit 5 and the second control unit 3 are connected with the motor controller 6 through communication wires. In order to realize the on-off control of the power supply loop, the power supply control switch comprises a total positive control switch and a total negative control switch, wherein the total positive control switch is arranged on a positive power supply line in a series manner, and the total negative control switch is arranged on a negative power supply line in a series manner. At this time, the first control unit 5 is in control connection with the total positive control switch and the total negative control switch, and the second control unit 3 is in control connection with the total positive control switch and the total negative control switch. In order to prevent the power supply current from being overlarge and realize the pre-charging function, the two ends of the main positive control switch are connected with pre-charging branches in parallel, the pre-charging branches are connected with a pre-charging resistor 10 and a pre-charging control switch in series, and the first control unit 5 is connected with the pre-charging control switch in a control mode.
In this embodiment, the total positive control switch is the total positive contactor 9, the total negative control switch is the total negative contactor 4, and the pre-charge control switch is the pre-charge contactor 8. At this time, the first control unit 5 is connected to the first ends of the coils of the total positive contactor 9, the total negative contactor 4, and the precharge contactor 8, and the second ends of the coils of the total positive contactor 9, the total negative contactor 4, and the precharge contactor 8 are grounded. The second control unit 3 is connected to the first ends of the coils of the total positive contactor 9 and the total negative contactor 4.
Of course, as other embodiments, the total positive control switch, the total negative control switch and the pre-charge control switch may be other types of controllable switches in the prior art, for example, a relay switch. In another embodiment, only 1 power supply control switch or 2 or more power supply control switches may be connected in series in the power supply circuit, and these power supply control switches may be connected in series in the positive power supply line and/or the negative power supply line and controlled by the first control unit 5 and the second control unit 3 to control the on/off of the power supply circuit.
As shown in fig. 1, a maintenance switch 2 (including a fuse) is connected in series in the middle of the power battery 1, the positive electrode of the power battery 1 is connected with a contact of the total positive contactor 9 and a pre-charging resistor 10, the pre-charging resistor 10 is connected with one contact of the pre-charging contactor 8, the other contact of the pre-charging contactor 8 is connected with the other contact of the total positive contactor 9, and the pre-charging resistor 10, the total positive contactor 9 and the pre-charging contactor 8 form a pre-charging loop, so that the motor controller 6 can be pre-charged. The positive pole of the motor controller 6 is connected with the total positive contactor 9 through the fuse 7, the negative pole of the motor controller 6 is connected with one contact of the total negative contactor 4, the negative pole of the power battery 1 is connected with the other contact of the total negative contactor 4, and a current sensor (not shown in fig. 1) is connected in series between the negative pole of the power battery 1 and the other contact of the total negative contactor 4.
In order to detect the vehicle speed, the driving device further includes a speed detecting unit that may be a device that obtains the vehicle speed by measuring the rotational speed of the wheels or a sensor that directly measures the vehicle speed. The speed detection unit is in communication connection with the second control unit and is used for sending the detected vehicle speed information to the second control unit, and the second control unit judges the vehicle speed. Of course, as another embodiment, the speed detection unit may be connected to the vehicle controller in a communication manner, and the vehicle controller may determine the vehicle speed and send the determination result to the second control unit.
Each device in the driving device of the electric automobile is mutually matched, so that a power supply control method of the electric automobile can be realized, and the power supply control method of the electric automobile is described in detail in the following power supply control method embodiment of the electric automobile, and is not repeated here.
The embodiment of the power supply control method of the electric automobile comprises the following steps:
based on the above-mentioned driving device of the electric vehicle, the present embodiment provides a power supply control method of the electric vehicle, and a corresponding flowchart is shown in fig. 2, and specifically includes the following steps:
(1) And if the vehicle power-on signal is received, controlling the power battery to supply power to the motor controller.
The first control unit 5 detects the state of the power battery 1, and if the vehicle power-on signal is received under the condition of no serious fault, the first control unit 5 controls the actuation of the total negative contactor 4 and controls the actuation of the pre-charging contactor 8 to pre-charge the motor controller 6. After the precharge power-up is completed, the first control unit 5 controls the total positive contactor 9 to be closed and opened to the precharge contactor 8. After the second control unit 3 completes the pre-charging and powering up, the output controls the total positive contactor 9 and the total negative contactor 4 to be attracted. This ensures that the power supply circuit is prevented from being disconnected abnormally due to a harness problem or vibration of the vehicle as a redundant control.
(2) When the electric automobile runs, if the power battery fails in a non-thermal failure mode, judging whether the current speed is greater than a set threshold value or not; if the current vehicle speed is greater than the set threshold, a related alarm signal is output to a driver, meanwhile, the second control unit detects whether an emergency mode switch signal is received within a first set time, and if the emergency mode switch signal is received, the second control unit controls the power supply control switch to keep on, and meanwhile, sends an instruction of not allowing the power supply control switch to be disconnected to the first control unit.
After the vehicle is powered up at high voltage, if a serious failure occurs in the vehicle power battery 1, it is determined whether the failure is a thermal failure (here, the thermal failure is a thermal runaway failure). If the vehicle is in a non-thermal failure fault, the first control unit 5 sends a request disconnection instruction, and the second control unit 3 judges whether to agree to power down according to the working condition of the vehicle and the emergency mode switch signal at the moment, and the two situations are divided at the moment:
If the current speed is greater than the set threshold, i.e. the vehicle is running at a high speed, a relevant warning signal is output to the driver, for example, by informing the driver through a meter that the power is turned off after a first set time, for example, after 30s, asking the driver to select whether to turn on the emergency mode. The set threshold is used for representing that the vehicle is running at a high speed, and can be set according to practical situations, and in the embodiment, the set threshold is set to be 80km/h. If the driver presses the emergency mode switch 11 within the first set time, the second control unit 3 receives the emergency mode signal, and then sends an instruction to the first control unit 5 that the power supply control switch is not allowed to be turned off, that is, the first control unit 5 is not allowed to be powered off, while the second control unit 3 keeps the total positive contactor 9 and the total negative contactor 4 to be attracted to avoid that the second control unit 3 does not execute the instruction, and informs the driver to find a safe place to stop as soon as possible. If the emergency mode switch signal is not received within the first set time, the second control unit 3 controls to turn off the power supply control switch after delaying the second set time, for example, after delaying for 30 seconds, and sends an instruction for allowing the power supply control switch to be turned off to the first control unit 5.
If the current speed is not greater than the set threshold, i.e. the vehicle is running at a low speed, the second control unit 3 outputs a relevant warning signal to the driver, for example, the second control unit 3 reminds the driver to stop driving to a safe place as soon as possible through warning or speed limiting means, after delaying for a second set time, for example, after delaying for 30 seconds, the second control unit 3 firstly controls to disconnect the total positive contactor 9 and the total negative contactor 4, the power supply loop is disconnected, and sends a command for allowing the first control unit 5 to allow the power down, i.e. sends a command for allowing the power supply control switch to be disconnected to the first control unit 5.
In addition, when the electric automobile runs, if the vehicle power battery 1 has a thermal failure fault, personal safety is caused by the thermal failure fault, and the power battery 1 may fire, so that the second control unit 3 sends an emergency power-off instruction for emergency power-off, the first control unit 5 and the second control unit 3 both output instructions for switching off the power supply control switch, and the first control unit 5 and the second control unit 3 control to switch off the total positive contactor 9 and the total negative contactor 4 and inform a driver of leaving the cockpit.
In the above-described power supply control method for an electric vehicle, the step (1) and the step (2) are two functions that can be realized by the driving device for an electric vehicle in fig. 1, and as another embodiment, the power supply control method for an electric vehicle may not include the step (1), but only include the power supply control process of the step (2) during the running process of the vehicle.
Drive system embodiment of electric automobile:
The embodiment provides a driving system (may be abbreviated as a driving system) of an electric automobile, which includes a power battery, a motor controller and a driving device, and because of the specific structure of the driving device and the connection relationship between the driving device and the power battery and the motor controller, the driving device embodiment of the electric automobile is described in detail, which is not described herein again.
Electric automobile embodiment:
The embodiment provides an electric automobile, including an electric automobile body and a driving system, where the driving system includes a power battery, a motor controller and a driving device, and the connection relationship between the driving device and the power battery and the motor controller is described in detail in the above driving device embodiment, which is not described herein again.
Finally, it should be noted that the foregoing embodiments are merely for illustrating the technical solution of the present application and not for limiting the scope of protection thereof, and although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that various changes, modifications or equivalents may be made to the specific embodiments of the application while still being within the scope of protection of the claims of the present application.
Claims (13)
1. The driving device of the electric automobile is characterized by comprising a first control unit, a second control unit and a power supply loop; the power supply circuit comprises a positive power supply circuit and a negative power supply circuit, one end of the positive power supply circuit is used for being connected with the positive electrode of the power battery, the other end of the positive power supply circuit is used for being connected with the positive electrode of the motor controller, one end of the negative power supply circuit is used for being connected with the negative electrode of the power battery, and the other end of the negative power supply circuit is used for being connected with the negative electrode of the motor controller; the positive power supply line and/or the negative power supply line are/is connected with a power supply control switch in series, and the first control unit and the second control unit are both in control connection with the power supply control switch; the second control unit is connected with an emergency mode switch in a sampling way, and the first control unit is connected with the second control unit in a communication way;
The driving device of the electric automobile is used for realizing the following method steps:
when a non-thermal failure fault occurs in the power battery in the running process of the electric automobile, judging whether the current speed is greater than a set threshold value or not;
If the current speed is greater than the set threshold, outputting a related alarm signal to a driver, detecting whether an emergency mode switch signal is received in a first set time by a second control unit, and if the emergency mode switch signal is received, controlling a power supply control switch to keep on by the second control unit, and simultaneously sending an instruction of not allowing the power supply control switch to be disconnected to the first control unit;
If the current speed is not greater than the set threshold, the second control unit outputs a relevant alarm signal to the driver, delays for a second set time, controls the power supply control switch to be turned off, and sends an instruction for allowing the power supply control switch to be turned off to the first control unit.
2. The drive device of an electric vehicle according to claim 1, wherein the power supply control switch includes a total positive control switch and a total negative control switch, the total positive control switch being connected in series to the positive power supply line, and the total negative control switch being connected in series to the negative power supply line.
3. The driving device of the electric automobile according to claim 2, wherein two ends of the main positive control switch are connected in parallel with a pre-charging branch, a pre-charging resistor and a pre-charging control switch are connected in series in the pre-charging branch, and the first control unit is connected with the pre-charging control switch in a control mode.
4. The driving device of an electric vehicle according to claim 1, further comprising a speed detection unit, wherein the second control unit is sampling-connected to the speed detection unit.
5. The driving system of the electric automobile is characterized by comprising a power battery, a motor controller and a driving device, wherein the driving device comprises a first control unit, a second control unit and a power supply loop; the power supply circuit comprises a positive power supply circuit and a negative power supply circuit, one end of the positive power supply circuit is connected with the positive electrode of the power battery, the other end of the positive power supply circuit is connected with the positive electrode of the motor controller, one end of the negative power supply circuit is connected with the negative electrode of the power battery, and the other end of the negative power supply circuit is connected with the negative electrode of the motor controller; the positive power supply line and/or the negative power supply line are/is connected with a power supply control switch in series, and the first control unit and the second control unit are both in control connection with the power supply control switch; the second control unit is connected with an emergency mode switch in a sampling way, and the first control unit is connected with the second control unit in a communication way;
the driving system of the electric automobile is used for realizing the following method steps:
when a non-thermal failure fault occurs in the power battery in the running process of the electric automobile, judging whether the current speed is greater than a set threshold value or not;
If the current speed is greater than the set threshold, outputting a related alarm signal to a driver, detecting whether an emergency mode switch signal is received in a first set time by a second control unit, and if the emergency mode switch signal is received, controlling a power supply control switch to keep on by the second control unit, and simultaneously sending an instruction of not allowing the power supply control switch to be disconnected to the first control unit;
If the current speed is not greater than the set threshold, the second control unit outputs a relevant alarm signal to the driver, delays for a second set time, controls the power supply control switch to be turned off, and sends an instruction for allowing the power supply control switch to be turned off to the first control unit.
6. The drive system of an electric vehicle according to claim 5, wherein the power supply control switch includes a total positive control switch and a total negative control switch, the total positive control switch being connected in series to the positive power supply line, and the total negative control switch being connected in series to the negative power supply line.
7. The driving system of the electric automobile according to claim 6, wherein two ends of the main positive control switch are connected in parallel with a pre-charging branch, a pre-charging resistor and a pre-charging control switch are connected in series in the pre-charging branch, and the first control unit is connected with the pre-charging control switch in a control mode.
8. The electric automobile is characterized by comprising an electric automobile body and a driving system, wherein the driving system comprises a power battery, a motor controller and a driving device, and the driving device comprises a first control unit, a second control unit and a power supply loop; the power supply circuit comprises a positive power supply circuit and a negative power supply circuit, one end of the positive power supply circuit is connected with the positive electrode of the power battery, the other end of the positive power supply circuit is connected with the positive electrode of the motor controller, one end of the negative power supply circuit is connected with the negative electrode of the power battery, and the other end of the negative power supply circuit is connected with the negative electrode of the motor controller; the positive power supply line and/or the negative power supply line are/is connected with a power supply control switch in series, and the first control unit and the second control unit are both in control connection with the power supply control switch; the second control unit is connected with an emergency mode switch in a sampling way, and the first control unit is connected with the second control unit in a communication way;
the electric automobile is used for realizing the following method steps:
when a non-thermal failure fault occurs in the power battery in the running process of the electric automobile, judging whether the current speed is greater than a set threshold value or not;
If the current speed is greater than the set threshold, outputting a related alarm signal to a driver, detecting whether an emergency mode switch signal is received in a first set time by a second control unit, and if the emergency mode switch signal is received, controlling a power supply control switch to keep on by the second control unit, and simultaneously sending an instruction of not allowing the power supply control switch to be disconnected to the first control unit;
If the current speed is not greater than the set threshold, the second control unit outputs a relevant alarm signal to the driver, delays for a second set time, controls the power supply control switch to be turned off, and sends an instruction for allowing the power supply control switch to be turned off to the first control unit.
9. The electric vehicle of claim 8, characterized in that the power supply control switch comprises a total positive control switch and a total negative control switch, the total positive control switch being connected in series on the positive power supply line, the total negative control switch being connected in series on the negative power supply line.
10. The electric automobile of claim 9, wherein a pre-charge branch is connected in parallel to two ends of the main positive control switch, a pre-charge resistor and a pre-charge control switch are connected in series in the pre-charge branch, and the first control unit is in control connection with the pre-charge control switch.
11. A power supply control method of an electric vehicle using the driving device of the electric vehicle according to claim 1, characterized by comprising the steps of:
when a non-thermal failure fault occurs in the power battery in the running process of the electric automobile, judging whether the current speed is greater than a set threshold value or not;
If the current speed is greater than the set threshold, outputting a related alarm signal to a driver, detecting whether an emergency mode switch signal is received in a first set time by a second control unit, and if the emergency mode switch signal is received, controlling a power supply control switch to keep on by the second control unit, and simultaneously sending an instruction of not allowing the power supply control switch to be disconnected to the first control unit;
If the current speed is not greater than the set threshold, the second control unit outputs a relevant alarm signal to the driver, delays for a second set time, controls the power supply control switch to be turned off, and sends an instruction for allowing the power supply control switch to be turned off to the first control unit.
12. The power supply control method of an electric vehicle according to claim 11, wherein when a thermal failure fault occurs in the power battery during operation of the electric vehicle, the first control unit and the second control unit each output an instruction to turn off the power supply control switch.
13. The power supply control method of an electric vehicle according to claim 11, wherein if the second control unit does not receive the emergency mode switching signal within the first set time, after delaying the second set time, the second control unit controls to turn off the power supply control switch and sends an instruction to the first control unit to allow the power supply control switch to be turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811571397.4A CN111347891B (en) | 2018-12-21 | 2018-12-21 | Electric automobile, driving device, driving system and power supply control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811571397.4A CN111347891B (en) | 2018-12-21 | 2018-12-21 | Electric automobile, driving device, driving system and power supply control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111347891A CN111347891A (en) | 2020-06-30 |
| CN111347891B true CN111347891B (en) | 2024-05-31 |
Family
ID=71190141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811571397.4A Active CN111347891B (en) | 2018-12-21 | 2018-12-21 | Electric automobile, driving device, driving system and power supply control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111347891B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117565678A (en) * | 2024-01-15 | 2024-02-20 | 宁德时代新能源科技股份有限公司 | Energy storage device, control method of energy storage device and power utilization device |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1170844A (en) * | 1997-08-29 | 1999-03-16 | Sanyo Electric Works Ltd | Vehicle emergency reporting device |
| CN103612571A (en) * | 2013-11-29 | 2014-03-05 | 东风小康汽车有限公司重庆分公司 | Electric automobile storage battery failure emergency control system |
| CN105128678A (en) * | 2015-10-13 | 2015-12-09 | 东风汽车股份有限公司 | High-voltage power-on and power-off control system and control method for pure electric vehicle |
| CN205202751U (en) * | 2015-11-06 | 2016-05-04 | 北汽福田汽车股份有限公司 | Electric automobile's driving system and electric automobile |
| CN106004454A (en) * | 2016-07-01 | 2016-10-12 | 广州汽车集团股份有限公司 | Safety control method and device of electric vehicle |
| CN106469927A (en) * | 2015-08-17 | 2017-03-01 | 福特全球技术公司 | The early warning of the battery Warm status based on voltage |
| CN107458243A (en) * | 2017-07-13 | 2017-12-12 | 合肥创智汽车技术开发有限公司 | A kind of scram control method driven for new-energy automobile Intelligent unattended |
| CN107662499A (en) * | 2016-07-28 | 2018-02-06 | 长城汽车股份有限公司 | Electric control method and system under whole pure electric vehicle failure |
| CN107719127A (en) * | 2017-09-21 | 2018-02-23 | 深圳市沃特玛电池有限公司 | Electric automobile and battery management system |
| CN108428963A (en) * | 2018-02-10 | 2018-08-21 | 山东国金汽车制造有限公司 | A kind of Li-ion batteries piles overheat protector system that hardware wakes up certainly |
| CN207790343U (en) * | 2018-01-02 | 2018-08-31 | 北京新能源汽车股份有限公司 | A kind of power supply system and automobile |
| CN209441212U (en) * | 2018-12-21 | 2019-09-27 | 河南森源重工有限公司 | Electric car and its driving device, drive system |
-
2018
- 2018-12-21 CN CN201811571397.4A patent/CN111347891B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1170844A (en) * | 1997-08-29 | 1999-03-16 | Sanyo Electric Works Ltd | Vehicle emergency reporting device |
| CN103612571A (en) * | 2013-11-29 | 2014-03-05 | 东风小康汽车有限公司重庆分公司 | Electric automobile storage battery failure emergency control system |
| CN106469927A (en) * | 2015-08-17 | 2017-03-01 | 福特全球技术公司 | The early warning of the battery Warm status based on voltage |
| CN105128678A (en) * | 2015-10-13 | 2015-12-09 | 东风汽车股份有限公司 | High-voltage power-on and power-off control system and control method for pure electric vehicle |
| CN205202751U (en) * | 2015-11-06 | 2016-05-04 | 北汽福田汽车股份有限公司 | Electric automobile's driving system and electric automobile |
| CN106004454A (en) * | 2016-07-01 | 2016-10-12 | 广州汽车集团股份有限公司 | Safety control method and device of electric vehicle |
| CN107662499A (en) * | 2016-07-28 | 2018-02-06 | 长城汽车股份有限公司 | Electric control method and system under whole pure electric vehicle failure |
| CN107458243A (en) * | 2017-07-13 | 2017-12-12 | 合肥创智汽车技术开发有限公司 | A kind of scram control method driven for new-energy automobile Intelligent unattended |
| CN107719127A (en) * | 2017-09-21 | 2018-02-23 | 深圳市沃特玛电池有限公司 | Electric automobile and battery management system |
| CN207790343U (en) * | 2018-01-02 | 2018-08-31 | 北京新能源汽车股份有限公司 | A kind of power supply system and automobile |
| CN108428963A (en) * | 2018-02-10 | 2018-08-21 | 山东国金汽车制造有限公司 | A kind of Li-ion batteries piles overheat protector system that hardware wakes up certainly |
| CN209441212U (en) * | 2018-12-21 | 2019-09-27 | 河南森源重工有限公司 | Electric car and its driving device, drive system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111347891A (en) | 2020-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107482761B (en) | Power supply system | |
| CN107662499B (en) | Pure electric vehicle complete vehicle fault power-off control method and system | |
| CN110303905B (en) | High-voltage topological structure for pure electric commercial vehicle and power-on and power-off control method | |
| CN108407618B (en) | Intelligent high-voltage power-off control device and control method based on driving intention | |
| CN102175971B (en) | Relay state detection method and device of electric vehicle high-voltage system | |
| KR100829307B1 (en) | Fault diagnosis control method for high voltage relay of hybrid electric vehicle | |
| CN114103838A (en) | Power control apparatus and method for autonomous vehicle | |
| KR101405757B1 (en) | Method for controlling stop modes of moter-driven power steering | |
| US10106042B2 (en) | Methods of operating contactors in high voltage circuits of vehicles | |
| CN104527446A (en) | High-pressure safety electric interlocking mechanism of electro-mobile, control method and electro-mobile | |
| JP2017005985A (en) | Secondary battery monitoring device, battery pack, secondary battery protection system, and vehicle | |
| KR20140114372A (en) | System and method for high voltage cable detection in hybrid vehicles | |
| CN102055176A (en) | Method for protecting electric vehicle contactor and battery management system | |
| CN110962606A (en) | Control system and method for emergency cut-off of high-voltage power supply of new energy automobile and new energy automobile | |
| CN111137132A (en) | Electric automobile collision power-off control method and system and electric automobile | |
| JP2015533069A (en) | Method and apparatus for management of an electrical energy storage assembly for powering an electric motor vehicle | |
| KR20200045836A (en) | System of determining state of power relay assembly | |
| JP5994652B2 (en) | Vehicle power supply control device | |
| GB2517184A (en) | Method and system for controlling an isolated HV circuit | |
| CN110539643A (en) | Method and device for controlling high voltage of electric automobile | |
| CN111347891B (en) | Electric automobile, driving device, driving system and power supply control method thereof | |
| CN110654238A (en) | New energy vehicle electrical system and safe power failure control method | |
| CN113306512A (en) | Finished automobile power distribution system and method and automobile | |
| CN103612571A (en) | Electric automobile storage battery failure emergency control system | |
| CN113043849A (en) | Insulation failure control method and control device for fuel cell vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |