CN113602094A - New energy automobile power-on method and device - Google Patents
New energy automobile power-on method and device Download PDFInfo
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- CN113602094A CN113602094A CN202110894540.9A CN202110894540A CN113602094A CN 113602094 A CN113602094 A CN 113602094A CN 202110894540 A CN202110894540 A CN 202110894540A CN 113602094 A CN113602094 A CN 113602094A
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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
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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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
- B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
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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
- B60L3/0084—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to control modules
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/427—Voltage
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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
- 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
- B60L2240/547—Voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of new energy automobiles, in particular to a power-on method and a power-on device of a new energy automobile, wherein the method comprises the following steps: before the whole vehicle is powered on, the pre-charging operation is carried out; in the pre-charging operation process, obtaining a first voltage difference according to the obtained battery voltage of the battery management system and the motor voltage of the motor control unit; the whole vehicle comprises the battery management system and the motor control unit; and if the first differential pressure is within a first differential pressure threshold range and the time of the pre-charging operation is not less than the set time, determining that the pre-charging operation is successful and carrying out power-on operation. The method achieves the technical effects of improving the power-on efficiency of the new energy automobile, enhancing the power-on stability, reducing the occurrence rate of the pre-charging fault of the whole automobile and ensuring the normal driving of a driver.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a power-on method and a power-on device of a new energy automobile.
Background
The new energy automobile needs to be precharged before being electrified at high voltage. In the existing pre-charging power-on strategy, the new energy automobile cannot accurately judge whether the new energy automobile has unsuccessful high voltage due to hardware failure or invalid voltage sampling, so that a driver cannot drive, and the problem of poor power-on stability of the new energy automobile is caused.
Disclosure of Invention
The embodiment of the application provides a new energy automobile power-on method and device, solves the technical problem that the new energy automobile power-on stability is poor in the prior art, improves the power-on efficiency of the new energy automobile, enhances the power-on stability, reduces the occurrence rate of the whole automobile pre-charging fault, and guarantees the technical effect that a driver normally runs.
In a first aspect, an embodiment of the present invention provides a method for powering a new energy vehicle, including:
before the whole vehicle is powered on, the pre-charging operation is carried out;
in the pre-charging operation process, obtaining a first voltage difference according to the obtained battery voltage of the battery management system and the motor voltage of the motor control unit; the whole vehicle comprises the battery management system and the motor control unit;
and if the first differential pressure is within a first differential pressure threshold range and the time of the pre-charging operation is not less than the set time, determining that the pre-charging operation is successful and carrying out power-on operation.
Preferably, after the obtaining the first pressure difference, the method further comprises:
and if the first differential pressure is not within the first differential pressure threshold range, performing voltage detection operation on the battery management system.
Preferably, the performing of the voltage detection operation on the battery management system includes:
acquiring a state of each of N connectors of the battery management system during the voltage detection operation; the N connectors comprise a connector between the battery management system and the motor control unit, a connector between the battery management system and the direct current converter, at least one of connectors between the battery management system and the vehicle-mounted charging unit, N is an integer larger than 1, and the whole vehicle comprises the direct current converter and the vehicle-mounted charging unit;
and if the state of each connector is the closed state, judging the converter voltage of the direct current converter and sending the state of each connector.
Preferably, after the obtaining the state of each of the N connectors of the battery management system, the method further includes:
if the state of a certain connector is in the off state, the information that the connector has a fault is sent, and the pre-charging operation is stopped.
Preferably, the determining the converter voltage of the dc converter includes:
obtaining a second voltage difference according to the battery voltage and the converter voltage;
if the second pressure difference is within a second pressure difference threshold range, determining that the pre-charging operation is successful, and performing the power-on operation;
and if the second differential pressure is not within the second differential pressure threshold range, judging the vehicle-mounted voltage of the vehicle-mounted charging unit, and sending information that the direct current converter has faults.
Preferably, the determining the vehicle-mounted voltage of the vehicle-mounted charging unit includes:
obtaining a third voltage difference according to the battery voltage and the vehicle-mounted voltage;
and if the third differential pressure is within a third differential pressure threshold range, determining that the pre-charging operation is successful, and performing the power-on operation.
Preferably, after the obtaining the third pressure difference, the method further includes:
determining that the precharge operation failed if the third pressure differential is not within the third pressure differential threshold range.
Based on the same inventive concept, in a second aspect, the present invention further provides a power-on device for a new energy vehicle, including:
the entering module is used for entering the pre-charging operation before the whole vehicle is electrified;
the acquisition module is used for acquiring a first voltage difference according to the acquired battery voltage of the battery management system and the acquired motor voltage of the motor control unit in the pre-charging operation process; the whole vehicle comprises the battery management system and the motor control unit;
and the output module is used for determining that the pre-charging operation is successful and carrying out power-on operation if the first pressure difference is within a first pressure difference threshold range and the time of the pre-charging operation is not less than the set time.
Based on the same inventive concept, in a third aspect, the invention provides a new energy automobile, which includes a memory, a processor, and a computer program stored on the memory and running on the processor, wherein the processor implements the steps of the safety protection method for the electronic device when executing the program.
Based on the same inventive concept, in a fourth aspect, the present invention provides a readable storage medium of a new energy automobile, where a computer program is stored on the readable storage medium of the new energy automobile, and when the computer program is executed by a processor, the steps of the safety protection method for an electronic device are implemented.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
in the embodiment of the application, in the process of the pre-charging operation, whether the pre-charging operation is successful or not is judged through the battery voltage of the battery management system and the motor voltage of the motor control unit, so that the whole vehicle can automatically eliminate faults, the situation that the whole vehicle is powered on by mistake and a driver cannot drive is avoided, and the redundancy and the reliability of a pre-charging system of a new energy vehicle are greatly improved. The specific judgment process is to obtain a first voltage difference according to the battery voltage and the motor voltage. When the first pressure difference is within the first pressure difference threshold range and the time of the pre-charging operation is not less than the set time, the successful pre-charging of the whole vehicle is determined, the power-on operation can be performed, and the power-on stability and the power-on efficiency of the whole vehicle are improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic flow chart illustrating steps of a power-on method of a new energy vehicle according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating another step of a power-on method of a new energy vehicle in an embodiment of the invention;
FIG. 3 shows a schematic structural diagram of a precharge system in an embodiment of the present invention;
fig. 4 shows a block diagram of a power-on device of a new energy automobile in an embodiment of the invention;
fig. 5 shows a schematic structural diagram of a computer device in an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example one
The first embodiment of the invention provides a power-on method of a new energy automobile, as shown in fig. 1 and fig. 2. The power-up method is applied to the pre-charging system, and for the sake of clarity, the structure of the pre-charging system will be described first.
As shown in fig. 3, the precharge system includes: a battery Management system bms (battery Management system), a motor Control unit mcu (motor Control unit), a DC-to-DC converter DC/DC (DC-to-DC converter), and an on-board charging unit obc (obair Charge module). The MCU, DC/DC and OBC are all electrically connected with the BMS. Through relay K1 and relay K2, the BMS carries out the precharge connection to MCU, DC/DC and OBC, and then makes BMS precharge the whole car. Through K1, relay K3, MCU, DC/DC and OBC, BMS is carried out the electricity on whole car to it is whole car to go on going.
Ub in FIG. 2 is the voltage of BMS, Um is the voltage of MCU, Ud is the voltage of DC/DC, and Uobc is the voltage of OBC. The Ud is obtained by a voltage divider circuit, a voltage isolation circuit and an operational amplifier circuit which are connected in sequence in the DCDC. The DC/DC carries out voltage division through a resistor, converts a certain proportion of high voltage into low voltage, then carries out voltage isolation processing, and finally amplifies and transmits a voltage signal to a processor for working, thereby obtaining Ud. Similarly, the Uobc is obtained by a voltage division circuit, a voltage isolation circuit and an operational amplifier circuit which are connected in sequence in the OBC. The OBC carries out voltage division through a resistor, converts high voltage of a certain proportion into low voltage, then carries out voltage isolation processing, and finally carries out amplification transmission on a voltage signal to a processor for working, so that the Uobc is obtained.
The following describes in detail specific implementation steps of the power-on method of the new energy vehicle provided in this embodiment with reference to fig. 1, fig. 2, and fig. 3:
first, step S101 is executed, and a precharge operation is performed before the entire vehicle is powered on.
Specifically, before the entire vehicle is powered on, K1 and K2 are closed, and the battery management system BMS precharges the motor control unit MCU at a low voltage.
Then, step S102 is executed, and during the pre-charging operation, a first voltage difference is obtained according to the acquired battery voltage of the battery management system and the motor voltage of the motor control unit; the whole vehicle comprises a battery management system and a motor control unit.
Specifically, during the pre-charging operation, the voltage of the battery management system BMS, which is referred to as the battery voltage Ub, and the voltage of the motor control unit MCU, which is referred to as the motor voltage Um, are acquired. According to Ub and Um, a first pressure difference U1 is obtained, i.e., U1 ═ Ub-Um or U1 ═ (Ub-Um) × a, where a is a weight value ranging from 0 to 1.
Finally, step S103 is executed, if the first differential pressure is within the first differential pressure threshold range and the time of the precharge operation is not less than the set time, it is determined that the precharge operation is successful, and the power-on operation is performed.
It should be noted that the first differential pressure threshold range is typically-20V to 20V, noted as-20, and the set time is typically set to 100 ms. Of course, the first differential pressure threshold range and the set time may be set according to actual requirements.
When the first pressure difference is within the first pressure difference threshold range and the time of the pre-charging operation is not less than the set time, namely | U1| ≦ 20V and the time of the pre-charging operation is not less than 100ms, it is determined that the pre-charging operation is successful, indicating that the pre-charging of the whole vehicle is completed, and the power-on operation can be performed. When the time of the precharge operation is less than the set time, i.e., the time of the precharge operation < 100ms, it is determined that the precharge operation failed.
Wherein, the power-on operation is realized by opening K2 and closing K3. The principle of the power-on operation is that the battery management system precharges the entire vehicle when K1 and K2 are turned off. After the pre-charging is successful, the voltage of each unit in the whole vehicle is stable, and K2 can be switched off and K3 can be switched on, so that the battery management system provides driving force for the whole vehicle, and abnormal adhesion caused by arc discharge during the suction of the contact of the main loop positive relay is avoided. If K1 and K3 are directly closed, the power of the battery pack is caused to break down each unit; and the relay can be caused to generate arc discharge, so that the relay is stuck together, and the service life of the relay is shortened.
In the embodiment, in the process of the pre-charging operation, whether the pre-charging operation is successful or not is judged through the battery voltage of the battery management system and the motor voltage of the motor control unit, so that the whole vehicle can automatically eliminate faults, the situations that the whole vehicle is powered on by mistake and a driver cannot drive are avoided, and the redundancy and the reliability of the pre-charging system of the new energy vehicle are greatly improved. The specific judgment process is to obtain a first voltage difference according to the battery voltage and the motor voltage. When the first pressure difference is within the first pressure difference threshold range and the time of the pre-charging operation is not less than the set time, the successful pre-charging of the whole vehicle is determined, the power-on operation can be performed, and the power-on stability and the power-on efficiency of the whole vehicle are improved.
And when the first differential pressure is not within the first differential pressure threshold range, performing voltage detection operation on the battery management system.
Specifically, the voltage detection operation performed on the battery management system includes: and judging the state of a connector connected with each unit by the battery management system, judging the voltage of the DC/DC converter and judging the voltage of the on-board charging unit OBC.
The process of detecting the state of the connectors of the battery management system connected with each unit is as follows:
acquiring the state of each of N connectors of a battery management system during a voltage detection operation; the N connectors comprise connectors between a battery management system and a motor control unit, connectors between the battery management system and a direct current converter, at least one of the connectors between the battery management system and a vehicle-mounted charging unit, N is an integer larger than 1, and the whole vehicle comprises the direct current converter and the vehicle-mounted charging unit. It should be noted that the connector is normally open when not operating and is closed when operating.
And if the state of each connector is a closed state, namely the state of each connector is a normal working state, judging the converter voltage of the DC converter and transmitting the state of each connector. If the state of a certain connector is in the off state, the information that the connector has a failure is transmitted, and the precharge operation is stopped.
For example, the state of the connector C1 between the battery management system and the motor control unit, the state of the connector C2 between the battery management system and the dc converter, and the state of the connector C3 between the battery management system and the vehicle-mounted charging unit are acquired.
When the state of the C1, the state of the C2 and the state of the C3 are all closed states, it is determined that none of the connectors C1, C2 and C3 has a fault, which indicates that the connectors C1, C2 and C3 are all in a normal operating state, a circuit between the battery management system and the motor control unit is normal, a circuit between the battery management system and the dc converter is normal, and a circuit between the battery management system and the vehicle-mounted charging unit is normal. Further, the converter voltage of the dc converter is determined.
When the state of the C1 is the open state, it is determined that there is a fault with the C1, including a fault with the connector C1 itself and a fault with the circuit in which the C1 is located. When the state of the C2 is the open state, it is determined that there is a fault with the C2, including a fault with the connector C2 itself and a fault with the circuit in which the C2 is located. When the state of the C3 is the open state, the C3 is determined to have a fault, and the fault comprises the fault of the connector C3 and the fault of the circuit in which the C3 is positioned.
In this embodiment, whether a fault exists in the connection relationship between the battery management system and each unit is determined by the state of each of the N connectors of the battery management system, so that in the voltage detection operation process, the battery management system is stably connected with each unit, the power-on stability and power-on efficiency of the whole vehicle are improved, the occurrence of mistaken power-on operation of the whole vehicle is avoided, and the normal driving of a driver is ensured.
The process of judging the converter voltage of the DC converter is as follows:
obtaining a second voltage difference according to the battery voltage and the converter voltage; if the second pressure difference is within the second pressure difference threshold range, determining that the pre-charging operation is successful, and performing power-on operation; and if the second differential pressure is not within the second differential pressure threshold range, judging the vehicle-mounted voltage of the vehicle-mounted charging unit, and sending information that the direct current converter has faults. The second differential pressure threshold range is typically-20V to 20V, and is noted as [ -20, 20], and can also be set according to actual requirements.
Specifically, the voltage of the dc converter is the converter voltage, denoted Ud. According to the battery voltage Ub and the converter voltage Ud, a second voltage difference U2 is obtained, i.e., U2 ═ Ub-Ud or U2 ═ (Ub-Ud) × b, where b is a weight value and ranges from 0 to 1.
When | U2| ≦ 20V, it is determined that the precharge operation was successful. When | U2| > 20V, the vehicle-mounted voltage of the vehicle-mounted charging unit is determined.
In the embodiment, whether the direct current converter has a fault is judged according to the voltage of the battery management system and the voltage of the direct current converter, so that the reason that the direct current converter has the fault is automatically eliminated, the power-on stability, reliability and power-on efficiency of the whole vehicle are improved, the occurrence of mistaken power-on operation of the whole vehicle is avoided, and the normal running of a driver is guaranteed.
The process of judging the vehicle-mounted voltage of the vehicle-mounted charging unit is as follows:
obtaining a third voltage difference according to the battery voltage and the vehicle-mounted voltage; and if the third differential pressure is within the third differential pressure threshold range, determining that the pre-charging operation is successful, and performing power-on operation. If the third pressure differential is not within the third pressure differential threshold range, it is determined that the precharge operation failed. The third differential pressure threshold range is typically-20V to 20V, and is noted as [ -20, 20], and can also be set according to actual requirements.
Specifically, the voltage of the vehicle-mounted charging unit is a vehicle-mounted voltage, denoted as Uobc. According to the battery voltage Ub and the vehicle-mounted device voltage Uobc, a third voltage difference U3 is obtained, i.e., U3 ═ Ub-Uobc or U2 ═ Ub-Uobc × c, where c is a weight value and ranges from 0 to 1.
When | U3| ≦ 20V, it is determined that the precharge operation was successful. When | U3| > 20V, it is determined that the precharge operation failed, and information that the precharge operation failed is transmitted.
In the embodiment, whether the vehicle-mounted charging unit has a fault or not is judged according to the voltage of the battery management system and the voltage of the vehicle-mounted charging unit, so that the reason that the vehicle-mounted charging unit has the fault is automatically eliminated, the power-on stability, reliability and power-on efficiency of the whole vehicle are improved, the occurrence of mistaken power-on operation of the whole vehicle is avoided, and the normal running of a driver is ensured.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
in the embodiment, in the process of the pre-charging operation, whether the pre-charging operation is successful or not is judged through the battery voltage of the battery management system and the motor voltage of the motor control unit, so that the whole vehicle can automatically eliminate faults, the situations that the whole vehicle is powered on by mistake and a driver cannot drive are avoided, and the redundancy and the reliability of the pre-charging system of the new energy vehicle are greatly improved. The specific judgment process is to obtain a first voltage difference according to the battery voltage and the motor voltage. When the first pressure difference is within the first pressure difference threshold range and the time of the pre-charging operation is not less than the set time, the successful pre-charging of the whole vehicle is determined, the power-on operation can be performed, and the power-on stability and the power-on efficiency of the whole vehicle are improved.
Example two
Based on the same inventive concept, a second embodiment of the present invention further provides a power-on device of a new energy vehicle, as shown in fig. 4, including:
an entering module 201, configured to enter a pre-charging operation before a whole vehicle is powered on;
an obtaining module 202, configured to obtain a first voltage difference according to an obtained battery voltage of the battery management system and a motor voltage of the motor control unit in the pre-charging operation process; the whole vehicle comprises the battery management system and the motor control unit;
and the output module 203 is configured to determine that the precharge operation is successful and perform a power-on operation if the first differential pressure is within a first differential pressure threshold range and the time of the precharge operation is not less than a set time.
As an alternative embodiment, the output module 203 is configured to, after obtaining the first pressure difference, include:
and if the first differential pressure is not within the first differential pressure threshold range, performing voltage detection operation on the battery management system.
As an alternative embodiment, the performing the voltage detection operation on the battery management system includes:
acquiring a state of each of N connectors of the battery management system during the voltage detection operation; the N connectors comprise a connector between the battery management system and the motor control unit, a connector between the battery management system and the direct current converter, at least one of connectors between the battery management system and the vehicle-mounted charging unit, N is an integer larger than 1, and the whole vehicle comprises the direct current converter and the vehicle-mounted charging unit; and if the state of each connector is the closed state, judging the converter voltage of the direct current converter and sending the state of each connector.
As an alternative embodiment, after the obtaining the status of each of the N connectors of the battery management system, the method further includes:
if the state of a certain connector is in the off state, the information that the connector has a fault is sent, and the pre-charging operation is stopped.
As an alternative embodiment, the determining the converter voltage of the dc converter includes:
obtaining a second voltage difference according to the battery voltage and the converter voltage;
if the second pressure difference is within a second pressure difference threshold range, determining that the pre-charging operation is successful, and performing the power-on operation; and if the second differential pressure is not within the second differential pressure threshold range, judging the vehicle-mounted voltage of the vehicle-mounted charging unit, and sending information that the direct current converter has faults.
As an optional embodiment, the determining the vehicle-mounted voltage of the vehicle-mounted charging unit includes:
obtaining a third voltage difference according to the battery voltage and the vehicle-mounted voltage;
and if the third differential pressure is within a third differential pressure threshold range, determining that the pre-charging operation is successful, and performing the power-on operation.
As an alternative embodiment, after the obtaining the third pressure difference, the method further includes:
determining that the precharge operation failed if the third pressure differential is not within the third pressure differential threshold range.
Since the power-on device of the new energy vehicle described in this embodiment is a device used for implementing the power-on method of the new energy vehicle in the first embodiment of the present application, based on the power-on method of the new energy vehicle described in the first embodiment of the present application, a person skilled in the art can understand a specific implementation manner of the power-on device of the new energy vehicle and various variations thereof, so how to implement the method in the first embodiment of the present application by the power-on device of the new energy vehicle is not described in detail herein. As long as a person skilled in the art implements the apparatus used in the method for powering on the new energy vehicle in the first embodiment of the present application, the apparatus is within the scope of the present application.
EXAMPLE III
Based on the same inventive concept, the third embodiment of the present invention further provides a new energy automobile, as shown in fig. 5, including a memory 304, a processor 302, and a computer program stored on the memory 304 and operable on the processor 302, where the processor 302, when executing the program, implements the steps of any one of the above-mentioned power-on methods of the new energy automobile.
Where in fig. 5 a bus architecture (represented by bus 300), bus 300 may include any number of interconnected buses and bridges, bus 300 linking together various circuits including one or more processors, represented by processor 302, and memory, represented by memory 304. The bus 300 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 306 provides an interface between the bus 300 and the receiver 301 and transmitter 303. The receiver 301 and the transmitter 303 may be the same element, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 302 is responsible for managing the bus 300 and general processing, and the memory 304 may be used for storing data used by the processor 302 in performing operations.
Example four
Based on the same inventive concept, a fourth embodiment of the present invention further provides a readable storage medium of a new energy automobile, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of any one of the methods of powering on the new energy automobile described in the previous embodiment.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A power-on method of a new energy automobile is characterized by comprising the following steps:
before the whole vehicle is powered on, the pre-charging operation is carried out;
in the pre-charging operation process, obtaining a first voltage difference according to the obtained battery voltage of the battery management system and the motor voltage of the motor control unit; the whole vehicle comprises the battery management system and the motor control unit;
and if the first differential pressure is within a first differential pressure threshold range and the time of the pre-charging operation is not less than the set time, determining that the pre-charging operation is successful and carrying out power-on operation.
2. The method of claim 1, wherein after said obtaining a first pressure differential, comprising:
and if the first differential pressure is not within the first differential pressure threshold range, performing voltage detection operation on the battery management system.
3. The method of claim 2, wherein the performing a voltage detection operation on the battery management system comprises:
acquiring a state of each of N connectors of the battery management system during the voltage detection operation; the N connectors comprise a connector between the battery management system and the motor control unit, a connector between the battery management system and the direct current converter, at least one of connectors between the battery management system and the vehicle-mounted charging unit, N is an integer larger than 1, and the whole vehicle comprises the direct current converter and the vehicle-mounted charging unit;
and if the state of each connector is the closed state, judging the converter voltage of the direct current converter and sending the state of each connector.
4. The method of claim 3, wherein after said obtaining the status of each of the N connectors of the battery management system, further comprising:
if the state of a certain connector is in the off state, the information that the connector has a fault is sent, and the pre-charging operation is stopped.
5. The method of claim 3, wherein the determining the converter voltage of the DC converter comprises:
obtaining a second voltage difference according to the battery voltage and the converter voltage;
if the second pressure difference is within a second pressure difference threshold range, determining that the pre-charging operation is successful, and performing the power-on operation;
and if the second differential pressure is not within the second differential pressure threshold range, judging the vehicle-mounted voltage of the vehicle-mounted charging unit, and sending information that the direct current converter has faults.
6. The method of claim 5, wherein the determining the vehicle voltage of the vehicle charging unit comprises:
obtaining a third voltage difference according to the battery voltage and the vehicle-mounted voltage;
and if the third differential pressure is within a third differential pressure threshold range, determining that the pre-charging operation is successful, and performing the power-on operation.
7. The method of claim 6, wherein after said obtaining a third pressure differential, further comprising:
determining that the precharge operation failed if the third pressure differential is not within the third pressure differential threshold range.
8. The utility model provides a power-on device of new energy automobile which characterized in that includes:
the entering module is used for entering the pre-charging operation before the whole vehicle is electrified;
the acquisition module is used for acquiring a first voltage difference according to the acquired battery voltage of the battery management system and the acquired motor voltage of the motor control unit in the pre-charging operation process; the whole vehicle comprises the battery management system and the motor control unit;
and the output module is used for determining that the pre-charging operation is successful and carrying out power-on operation if the first pressure difference is within a first pressure difference threshold range and the time of the pre-charging operation is not less than the set time.
9. A new energy vehicle comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor executes the program to carry out the method steps according to any one of claims 1 to 7.
10. Readable storage medium of a new energy automobile, on which a computer program is stored, which program, when being executed by a processor, carries out the method steps according to any one of claims 1 to 7.
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