CN112937302A - High-voltage monitoring method, device, storage medium and system - Google Patents
High-voltage monitoring method, device, storage medium and system Download PDFInfo
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- CN112937302A CN112937302A CN202110099200.7A CN202110099200A CN112937302A CN 112937302 A CN112937302 A CN 112937302A CN 202110099200 A CN202110099200 A CN 202110099200A CN 112937302 A CN112937302 A CN 112937302A
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The embodiment of the invention discloses a high-voltage monitoring method, a high-voltage monitoring device, a storage medium and a high-voltage monitoring system. The method comprises the following steps: responding to a high-voltage monitoring request, and synchronously acquiring first voltage data and first current data of a power battery pack of the electric automobile through a high-voltage monitoring unit; calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the first current data, and sending the first energy value to a battery management unit; wherein the first energy value is used for instructing the battery management unit to perform high-voltage monitoring on the power battery pack. Through the technical scheme, the voltage data and the current data of the power battery pack can be synchronously acquired based on the high-voltage monitoring unit, so that the energy value of the power battery pack is accurately calculated according to the synchronously acquired current data and voltage data, the power battery is subjected to high-voltage monitoring, and the safety and reliability of the running of the electric automobile are effectively guaranteed.
Description
Technical Field
The embodiment of the invention relates to the technical field of vehicle control, in particular to a high-voltage monitoring method, a high-voltage monitoring device, a high-voltage monitoring storage medium and a high-voltage monitoring system.
Background
In recent years, with the development of automobile technology and the great improvement of automobile holding capacity, people have made higher and higher requirements on the intelligence and safety of automobiles. A Battery Management System (BMS) of an electric vehicle is generally configured by a Battery Management unit, a current sensor, a voltage monitoring unit, and the like. The current sensor is responsible for collecting charging and discharging current, the voltage monitoring unit is responsible for collecting voltage of the power battery pack, and the battery management unit controls the whole system. Therefore, the system can sample the charging and discharging current of the power battery pack of the electric automobile, the total voltage of the system, the insulation state of the system, the adhesion state of the relay and the like, so that the electric automobile can work in the safety range of the power battery pack.
However, in the related art, the battery management system of the electric vehicle separately collects the voltage and the current, that is, the voltage monitoring unit collects the voltage of the power battery pack, and the current sensor collects the current of the power battery pack, because the instantaneous fluctuation of the voltage and the current is large during the driving process of the vehicle, and there is a time difference between the receiving of the command and the collection of the discrete sensor, it is difficult to ensure the synchronism of the monitored voltage and current data, and the asynchronous voltage and current data has a great influence on the accuracy of the energy calculation of the calculation system, and the safety and reliability of the operation of the electric vehicle cannot be well ensured.
Disclosure of Invention
The invention provides a high-voltage monitoring method, a high-voltage monitoring device, a high-voltage monitoring storage medium and a high-voltage monitoring system, which can synchronously acquire voltage data and current data of a power battery pack and accurately calculate the energy value of the power battery pack, thereby ensuring the safety and reliability of the running of an electric automobile.
In a first aspect, an embodiment of the present invention provides a high voltage monitoring method, including:
responding to a high-voltage monitoring request, and synchronously acquiring first voltage data and first current data of a power battery pack of the electric automobile through a high-voltage monitoring unit;
calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the first current data, and sending the first energy value to a battery management unit; wherein the first energy value is used for instructing the battery management unit to perform high-voltage monitoring on the power battery pack.
Optionally, before calculating, by the high-voltage monitoring unit, a first energy value of the power battery pack based on the first voltage data and the first current data, the method further includes:
acquiring the temperature of the high-voltage monitoring unit;
correcting the first current data according to the temperature of the high-voltage monitoring unit;
calculating, by the high voltage monitoring unit, a first energy value of the power battery pack based on the first voltage data and the first current data, including:
and calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the corrected first current data.
Optionally, the method further includes:
acquiring second current data of the power battery pack, which is acquired by a Hall current sensor; calculating, by a battery management unit, a second energy value based on the first voltage data and the second current data; correspondingly, after the energy value is sent to the battery management unit, the method further comprises the following steps: performing a redundancy check on the first energy value based on the second energy value.
Optionally, the method further includes:
when an insulation detection instruction sent by the battery management unit is detected, insulation resistance values of a positive electrode and a negative electrode of the power battery pack relative to a vehicle body ground are respectively determined based on a preset single-bridge arm insulation detection circuit;
and determining the insulation state of the power battery pack based on the insulation resistance value, and reporting the insulation state to the battery management unit.
Optionally, determining an insulation state of the power battery pack based on the insulation resistance value, and reporting the insulation state to the battery management unit, includes:
when the insulation resistance value is smaller than a preset insulation threshold value, determining that the insulation state of the power battery pack is abnormal, and reporting the insulation resistance value and the abnormal insulation state to the battery management unit;
and when the insulation resistance value is larger than a preset insulation threshold value, determining that the insulation state of the power battery pack is normal, and reporting the normal insulation state to the battery management unit.
In a second aspect, an embodiment of the present invention further provides a high voltage monitoring apparatus, including:
the data acquisition module is used for responding to a high-voltage monitoring request and synchronously acquiring first voltage data and first current data of a power battery pack of the electric automobile through a high-voltage monitoring unit;
the energy calculation module is used for calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the first current data and sending the first energy value to the battery management unit; wherein the first energy value is used for instructing the battery management unit to perform high-voltage monitoring on the power battery pack.
Optionally, the apparatus further comprises:
the temperature acquisition module is used for acquiring the temperature of the high-voltage monitoring unit before a first energy value of the power battery pack is calculated by the high-voltage monitoring unit based on the first voltage data and the first current data;
the current correction module is used for correcting the first current data according to the temperature of the high-voltage monitoring unit;
the energy calculation module is configured to:
and calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the corrected first current data.
Optionally, the apparatus further comprises:
the current acquisition module is used for acquiring second current data of the power battery pack, which is acquired by the Hall current sensor;
a second energy calculation module to calculate, by a battery management unit, a second energy value based on the first voltage data and the second current data;
and the first redundancy check module is used for performing redundancy check on the first energy value based on the second energy value after the energy value is sent to the battery management unit. Optionally, the apparatus further comprises:
the insulation resistance determining module is used for respectively determining the insulation resistance values of the positive pole and the negative pole of the power battery pack relative to the ground of the vehicle body based on a preset single-bridge-arm insulation detecting circuit when an insulation detecting instruction sent by the battery management unit is detected;
and the insulation state determining module is used for determining the insulation state of the power battery pack based on the insulation resistance value and reporting the insulation state to the battery management unit.
Optionally, the insulation state determining module is configured to:
when the insulation resistance value is smaller than a preset insulation threshold value, determining that the insulation state of the power battery pack is abnormal, and reporting the insulation resistance value and the abnormal insulation state to the battery management unit;
and when the insulation resistance value is larger than a preset insulation threshold value, determining that the insulation state of the power battery pack is normal, and reporting the normal insulation state to the battery management unit.
In a third aspect, an embodiment of the present invention further provides a computer storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the high voltage monitoring method provided in any embodiment of the present invention.
In a fourth aspect, an embodiment of the present invention provides a high voltage monitoring system, which includes a high voltage monitoring unit, a battery management unit, a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the high voltage monitoring method provided in the embodiment of the present invention.
The high-voltage monitoring scheme provided by the invention comprises the following steps: responding to a high-voltage monitoring request, and synchronously acquiring first voltage data and first current data of a power battery pack of the electric automobile through a high-voltage monitoring unit; calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the first current data, and sending the first energy value to a battery management unit; wherein the first energy value is used for instructing the battery management unit to perform high-voltage monitoring on the power battery pack. In the technical scheme provided by the embodiment of the invention, the voltage data and the current data of the power battery pack can be synchronously acquired based on the high-voltage monitoring unit, so that the energy value of the power battery pack is accurately calculated according to the synchronously acquired current data and voltage data, the power battery is subjected to high-voltage monitoring, and the safety and reliability of the running of the electric automobile are effectively ensured.
Drawings
Fig. 1 is a schematic flow chart of a high voltage monitoring method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a single-bridge arm insulation detection circuit according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of another high voltage monitoring method according to an embodiment of the present invention;
fig. 4 is a block diagram of a high voltage monitoring apparatus according to an embodiment of the present invention;
fig. 5 is a block diagram of a high voltage monitoring system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic flow chart of a high voltage monitoring method according to an embodiment of the present invention, which may be executed by a high voltage monitoring apparatus, where the apparatus may be implemented by software and/or hardware, and may be generally integrated in a high voltage monitoring system, and the high voltage monitoring system may be generally configured in an electric vehicle. As shown in fig. 1, the method includes:
The power battery pack is an energy unit which is loaded on the electric automobile and used for providing a power source and electric quantity required by the whole automobile for the electric automobile, wherein the power battery pack can comprise one or more battery monomers which are connected in series.
In the embodiment of the invention, in response to a high-voltage monitoring request, first voltage data and first current data of a power battery pack of an electric automobile are synchronously acquired through a high-voltage monitoring unit. For example, after the vehicle is in a power-on state or after the vehicle is powered on and initialized, when the high-voltage monitoring unit receives a high-voltage monitoring instruction sent by the battery management unit, the high-voltage monitoring unit starts a synchronous acquisition function of total voltage and total current of the power battery pack, acquires the total voltage and the total current of the power battery pack, and acquires first voltage data and first current data of the power battery pack. It is understood that the first voltage data and the first current data are a voltage value and a current value of the power battery pack at the same time, respectively.
Optionally, the first voltage data and the first current data of the power battery pack may be synchronously acquired through the high-voltage monitoring unit in real time, or the first voltage data and the first current data of the power battery pack may be synchronously acquired through the high-voltage monitoring unit at intervals of a preset time period.
102, calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the first current data, and sending the first energy value to a battery management unit; wherein the first energy value is used for instructing the battery management unit to perform high-voltage monitoring on the power battery pack.
In the embodiment of the invention, after first voltage data and first current data of the power battery pack which are synchronously acquired are acquired, an energy value of the power battery pack is calculated according to the first voltage data and the second current data and is used as a first energy value of the power battery pack, wherein the first energy value is a product of the first voltage data and the first current data. And sending the first energy value to a battery management unit, so that the battery management unit can perform high-voltage monitoring on the power battery pack according to the first energy value, and if the driving range of the power battery pack for the electric automobile can be estimated according to the first energy value. Optionally, the first voltage data and/or the first current data may also be sent to the battery management unit, so that the battery management unit performs high-voltage monitoring on the power battery pack according to the first voltage data and/or the first current data, for example, to determine whether the power battery pack is in a normal state.
Optionally, before calculating, by the high-voltage monitoring unit, a first energy value of the power battery pack based on the first voltage data and the first current data, the method further includes: acquiring the temperature of the high-voltage monitoring unit; correcting the first current data according to the temperature of the high-voltage monitoring unit; calculating, by the high voltage monitoring unit, a first energy value of the power battery pack based on the first voltage data and the first current data, including: and calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the corrected first current data. The advantage that sets up like this lies in, can consider the influence of the temperature of high pressure monitoring unit to the current data of power battery group, further the accurate current data that acquire the power battery group to effectively guarantee the high pressure monitoring to the power battery group, guarantee the security of electric automobile operation.
For example, a temperature sensor may be disposed in the high voltage monitoring unit, and the temperature of the high voltage monitoring unit may be synchronously acquired by the temperature sensor while the first voltage data and the first current data of the power battery pack of the electric vehicle are synchronously acquired by the high voltage monitoring unit, and the first current data may be corrected according to the temperature of the high voltage monitoring unit. For example, a correspondence table of the temperature of the high voltage monitoring unit and the current correction value may be obtained, and the current correction value may be determined based on the correspondence table, so as to correct the first current data according to the current correction value. And calculating a first energy value of the power battery pack through the first voltage data acquired by the high-voltage monitoring unit and the corrected first current data, wherein the first energy value is the product of the first voltage data and the corrected first current data.
The high-voltage monitoring scheme provided by the invention comprises the following steps: responding to a high-voltage monitoring request, and synchronously acquiring first voltage data and first current data of a power battery pack of the electric automobile through a high-voltage monitoring unit; calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the first current data, and sending the first energy value to a battery management unit; wherein the first energy value is used for instructing the battery management unit to perform high-voltage monitoring on the power battery pack. In the technical scheme provided by the embodiment of the invention, the voltage data and the current data of the power battery pack can be synchronously acquired based on the high-voltage monitoring unit, so that the energy value of the power battery pack is accurately calculated according to the synchronously acquired current data and voltage data, the power battery is subjected to high-voltage monitoring, and the safety and reliability of the running of the electric automobile are effectively ensured.
In some embodiments, further comprising: acquiring second current data of the power battery pack, which is acquired by a Hall current sensor; calculating, by a battery management unit, a second energy value based on the first voltage data and the second current data; correspondingly, after the energy value is sent to the battery management unit, the method further comprises the following steps: performing a redundancy check on the first energy value based on the second energy value.
Illustratively, the battery management unit controls the high-voltage monitoring unit to synchronously acquire first voltage data and first current data of the power battery pack, and simultaneously controls the hall current sensor to acquire current data of the power battery pack, and the current data of the power battery pack acquired by the hall current sensor is used as second current data. The battery management unit acquires second current data acquired by the Hall current sensor and first voltage data acquired by the high-voltage monitoring unit, and calculates a second energy value according to the first voltage data and the second current data, wherein the second energy value is the product of the first voltage data and the second current data, and then the battery management unit conducts redundancy check on the first energy value based on the second energy value, namely whether the first energy value is correct is judged based on the second energy value, if yes, the first energy value is wrong, and if not, the first energy value is correct.
In some embodiments, the high voltage monitoring method further comprises: when an insulation detection instruction sent by the battery management unit is detected, insulation resistance values of a positive electrode and a negative electrode of the power battery pack relative to a vehicle body ground are respectively determined based on a preset single-bridge arm insulation detection circuit; and determining the insulation state of the power battery pack based on the insulation resistance value, and reporting the insulation state to the battery management unit. The advantage that sets up like this lies in, single bridge arm insulation detection circuit simple structure, hardware are with low costs, can calculate the current insulation resistance value of power battery according to cutting into different resistance.
For example, when an insulation detection instruction sent by the battery management unit is detected, insulation resistance values of the positive electrode and the negative electrode of the power battery pack relative to the ground of the vehicle body are respectively determined based on a preset single-bridge-arm insulation detection circuit, such as a first insulation resistance value and a second insulation resistance value, then the insulation state of the power battery pack is determined according to the first insulation resistance value and the second insulation resistance value, and the insulation state of the power battery pack is reported to the battery management unit, so that the battery management unit monitors the power battery pack at high voltage according to the insulation state of the power battery pack. Optionally, determining an insulation state of the power battery pack based on the insulation resistance value, and reporting the insulation state to the battery management unit, includes: when the insulation resistance value is smaller than a preset insulation threshold value, determining that the insulation state of the power battery pack is abnormal, and reporting the insulation resistance value and the abnormal insulation state to the battery management unit; and when the insulation resistance value is larger than a preset insulation threshold value, determining that the insulation state of the power battery pack is normal, and reporting the normal insulation state to the battery management unit. For example, when at least one of the two insulation resistance values (the first insulation resistance value and the second insulation resistance value) is smaller than a preset insulation threshold value, it is determined that the insulation state of the power battery pack is abnormal, and the abnormal insulation resistance value (the insulation resistance value smaller than the preset insulation threshold value) and the information of the abnormal insulation state are reported to the battery management unit, so that the battery management unit can analyze the abnormal insulation state of the power battery pack. When the two insulation resistance values are both larger than the preset insulation threshold value, the insulation state of the power battery pack is determined to be normal, and the information that the insulation state is normal is reported to the battery management unit, so that the battery management unit can know that the insulation state of the power battery pack is normal.
Fig. 2 is a schematic structural diagram of a single-bridge arm insulation detection circuit according to an embodiment of the present invention. As shown in fig. 2, two large resistors Rx and Ry with the same resistance are connected in series at the rear ends of the high-voltage positive relay S1 and the negative relay S2, wherein the resistors Rx and Ry can effectively improve the detection accuracy, and the switch S4 controls the connection of the vehicle body ground. The resistance value cut into the bridge arm is adjusted through the switch S3 to obtain two groups of voltage values, and the insulation resistance value of the anode/cathode of the power battery pack to the vehicle body ground can be calculated according to two groups of equations. Exemplarily, 1, closing the switch S1 and the switch S2, reading the total voltage U1 of the power battery pack; 2. closing the switch S4, and reading the voltage Ux at the moment; let Ux be Uxs4 at this time; 3. closing a switch S3, reading the voltage Ux at the moment, and making the Ux at the moment be Uxs 3; 4. the insulation resistance value of the positive electrode/the negative electrode to the vehicle body ground can be calculated according to U1, Uxs3, Uxs4, R1, R2, R3, R4, Rx and Ry. For example, in the single-bridge arm insulation detection circuit, the resistor Rx may be 20M Ω, the resistor Ry may be 20M Ω, R1 may be 800K Ω, R2 may be 1.13M Ω, R3 may be 1.768M Ω, R4 may be 33K Ω, the switches S1 and S2 may use an optical coupler switch with a material number of AQW216, the switch S4 may use an optical coupler switch with a material number of AQV258H, and the switch S3 may use an N-MOS with a material number of STD3N95K5 AG.
Fig. 3 is a schematic flow chart of another high-voltage monitoring method according to an embodiment of the present invention, as shown in fig. 3, the method includes the following steps:
And step 302, acquiring the temperature of the high-voltage monitoring unit.
And step 303, correcting the first current data according to the temperature of the high-voltage monitoring unit.
And step 304, calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the corrected first current data.
And step 306, when the insulation detection command sent by the battery management unit is detected, respectively determining the insulation resistance values of the positive electrode and the negative electrode of the power battery pack relative to the ground of the vehicle body based on a preset single-bridge-arm insulation detection circuit.
And 308, determining that the insulation state of the power battery pack is normal, and reporting the normal insulation state to a battery management unit.
It should be noted that, in the embodiment of the present invention, the execution sequence of steps 301 to 305 and steps 306 to 309 is not limited, and step 301 to step 305 may be executed first, and then step 306 to step 309 may be executed, or step 306 to step 309 may be executed first, and then step 301 to step 305 may be executed, or step 301 to step 305 and step 306 to step 309 may be executed at the same time.
The high-voltage monitoring method provided by the embodiment of the invention not only can be used for synchronously acquiring the voltage data and the current data of the power battery pack based on the high-voltage monitoring unit so as to accurately calculate the energy value of the power battery pack according to the synchronously acquired current data and voltage data, but also can be used for accurately and quickly detecting the insulation state of the power battery pack based on the single-bridge-arm insulation detection circuit, thereby realizing the high-voltage monitoring of the power battery pack and effectively ensuring the running safety of an electric automobile.
Fig. 4 is a block diagram of a high voltage monitoring apparatus according to an embodiment of the present invention, which may be implemented by software and/or hardware, and is generally integrated in a high voltage monitoring system, and may perform high voltage monitoring on a power battery pack by performing a high voltage monitoring method. As shown in fig. 4, the apparatus includes:
the data acquisition module 401 is used for responding to a high-voltage monitoring request and synchronously acquiring first voltage data and first current data of a power battery pack of the electric automobile through a high-voltage monitoring unit;
a first energy calculating module 402, configured to calculate, by the high voltage monitoring unit, a first energy value of the power battery pack based on the first voltage data and the first current data, and send the first energy value to a battery management unit; wherein the first energy value is used for instructing the battery management unit to perform high-voltage monitoring on the power battery pack.
The high-voltage monitoring device responds to a high-voltage monitoring request, and synchronously acquires first voltage data and first current data of a power battery pack of the electric automobile through a high-voltage monitoring unit; calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the first current data, and sending the first energy value to a battery management unit; wherein the first energy value is used for instructing the battery management unit to perform high-voltage monitoring on the power battery pack. In the technical scheme provided by the embodiment of the invention, the voltage data and the current data of the power battery pack can be synchronously acquired based on the high-voltage monitoring unit, so that the energy value of the power battery pack is accurately calculated according to the synchronously acquired current data and voltage data, the power battery is subjected to high-voltage monitoring, and the running safety of the electric automobile is effectively ensured.
The data acquisition module is used for responding to a high-voltage monitoring request and synchronously acquiring first voltage data and first current data of a power battery pack of the electric automobile through a high-voltage monitoring unit;
the energy calculation module is used for calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the first current data and sending the first energy value to the battery management unit; wherein the first energy value is used for instructing the battery management unit to perform high-voltage monitoring on the power battery pack.
Optionally, the apparatus further comprises:
the temperature acquisition module is used for acquiring the temperature of the high-voltage monitoring unit before a first energy value of the power battery pack is calculated by the high-voltage monitoring unit based on the first voltage data and the first current data;
the current correction module is used for correcting the first current data according to the temperature of the high-voltage monitoring unit;
the energy calculation module is configured to:
and calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the corrected first current data.
Optionally, the apparatus further comprises:
the current acquisition module is used for acquiring second current data of the power battery pack, which is acquired by the Hall current sensor;
a second energy calculation module to calculate, by a battery management unit, a second energy value based on the first voltage data and the second current data;
and the first redundancy check module is used for performing redundancy check on the first energy value based on the second energy value after the energy value is sent to the battery management unit.
Optionally, the apparatus further comprises:
the insulation resistance determining module is used for respectively determining the insulation resistance values of the positive pole and the negative pole of the power battery pack relative to the ground of the vehicle body based on a preset single-bridge-arm insulation detecting circuit when an insulation detecting instruction sent by the battery management unit is detected;
and the insulation state determining module is used for determining the insulation state of the power battery pack based on the insulation resistance value and reporting the insulation state to the battery management unit.
Optionally, the insulation state determining module is configured to:
when the insulation resistance value is smaller than a preset insulation threshold value, determining that the insulation state of the power battery pack is abnormal, and reporting the insulation resistance value and the abnormal insulation state to the battery management unit;
and when the insulation resistance value is larger than a preset insulation threshold value, determining that the insulation state of the power battery pack is normal, and reporting the normal insulation state to the battery management unit.
Embodiments of the present invention also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform a high voltage monitoring method, the method including:
responding to a high-voltage monitoring request, and synchronously acquiring first voltage data and first current data of a power battery pack of the electric automobile through a high-voltage monitoring unit;
calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the first current data, and sending the first energy value to a battery management unit; wherein the first energy value is used for instructing the battery management unit to perform high-voltage monitoring on the power battery pack.
Storage medium-any of various types of memory devices or storage devices. The term "storage medium" is intended to include: mounting media such as CD-ROM, floppy disk, or tape devices; computer system memory or random access memory such as DRAM, DDRRAM, SRAM, EDORAM, Lanbas (Rambus) RAM, etc.; non-volatile memory such as flash memory, magnetic media (e.g., hard disk or optical storage); registers or other similar types of memory elements, etc. The storage medium may also include other types of memory or combinations thereof. In addition, the storage medium may be located in a first computer system in which the program is executed, or may be located in a different second computer system connected to the first computer system through a network (such as the internet). The second computer system may provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media that may reside in different locations, such as in different computer systems that are connected by a network. The storage medium may store program instructions (e.g., embodied as a computer program) that are executable by one or more processors.
Of course, the storage medium provided by the embodiment of the present invention contains computer-executable instructions, and the computer-executable instructions are not limited to the above-mentioned high-voltage monitoring operation, and may also perform related operations in the high-voltage monitoring method provided by any embodiment of the present invention.
The embodiment of the invention provides a high-voltage monitoring system, and a high-voltage monitoring device provided by the embodiment of the invention can be integrated in the high-voltage monitoring system. Fig. 5 is a block diagram of a high voltage monitoring system according to an embodiment of the present invention. The high voltage monitoring system 500 may include: a high voltage monitoring unit 501, a battery management unit 502, a memory 503, a processor 504 and a computer program stored on the memory 503 and executable on the processor, wherein the processor 504 implements the high voltage monitoring method according to the embodiment of the present invention when executing the computer program.
The high-voltage monitoring system provided by the embodiment of the invention responds to a high-voltage monitoring request, and synchronously acquires first voltage data and first current data of a power battery pack of the electric automobile through a high-voltage monitoring unit; calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the first current data, and sending the first energy value to a battery management unit; wherein the first energy value is used for instructing the battery management unit to perform high-voltage monitoring on the power battery pack. In the technical scheme provided by the embodiment of the invention, the voltage data and the current data of the power battery pack can be synchronously acquired based on the high-voltage monitoring unit, so that the energy value of the power battery pack is accurately calculated according to the synchronously acquired current data and voltage data, the power battery is subjected to high-voltage monitoring, and the safety and reliability of the running of the electric automobile are effectively ensured.
The high-voltage monitoring device, the storage medium and the system provided in the above embodiments can execute the high-voltage monitoring method provided in any embodiment of the present invention, and have corresponding functional modules and beneficial effects for executing the method. For technical details not described in detail in the above embodiments, reference may be made to the high voltage monitoring method provided in any embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A high-voltage monitoring method is applied to an electric automobile and is characterized by comprising the following steps:
responding to a high-voltage monitoring request, and synchronously acquiring first voltage data and first current data of a power battery pack of the electric automobile through a high-voltage monitoring unit;
calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the first current data, and sending the first energy value to a battery management unit; wherein the first energy value is used for instructing the battery management unit to perform high-voltage monitoring on the power battery pack.
2. The method of claim 1, further comprising, prior to calculating, by the high voltage monitoring unit, a first energy value of the power battery pack based on the first voltage data and the first current data:
acquiring the temperature of the high-voltage monitoring unit;
correcting the first current data according to the temperature of the high-voltage monitoring unit;
calculating, by the high voltage monitoring unit, a first energy value of the power battery pack based on the first voltage data and the first current data, including:
and calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the corrected first current data.
3. The method of claim 1, further comprising:
acquiring second current data of the power battery pack, which is acquired by a Hall current sensor;
calculating, by a battery management unit, a second energy value based on the first voltage data and the second current data;
correspondingly, after the energy value is sent to the battery management unit, the method further comprises the following steps:
performing a redundancy check on the first energy value based on the second energy value.
4. The method of claim 1, further comprising:
when an insulation detection instruction sent by the battery management unit is detected, insulation resistance values of a positive electrode and a negative electrode of the power battery pack relative to a vehicle body ground are respectively determined based on a preset single-bridge arm insulation detection circuit;
and determining the insulation state of the power battery pack based on the insulation resistance value, and reporting the insulation state to the battery management unit.
5. The method of claim 4, wherein determining the insulation state of the power battery pack based on the insulation resistance value and reporting the insulation state to the battery management unit comprises:
when the insulation resistance value is smaller than a preset insulation threshold value, determining that the insulation state of the power battery pack is abnormal, and reporting the insulation resistance value and the abnormal insulation state to the battery management unit;
and when the insulation resistance value is larger than a preset insulation threshold value, determining that the insulation state of the power battery pack is normal, and reporting the normal insulation state to the battery management unit.
6. The utility model provides a high pressure monitoring device, is applied to electric automobile, its characterized in that includes:
the data acquisition module is used for responding to a high-voltage monitoring request and synchronously acquiring first voltage data and first current data of a power battery pack of the electric automobile through a high-voltage monitoring unit;
the first energy calculating module is used for calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the first current data and sending the first energy value to a battery management unit; wherein the first energy value is used for instructing the battery management unit to perform high-voltage monitoring on the power battery pack.
7. The apparatus of claim 6, further comprising:
the temperature acquisition module is used for acquiring the temperature of the high-voltage monitoring unit before a first energy value of the power battery pack is calculated by the high-voltage monitoring unit based on the first voltage data and the first current data;
the current correction module is used for correcting the first current data according to the temperature of the high-voltage monitoring unit;
the energy calculation module is configured to:
and calculating a first energy value of the power battery pack through the high-voltage monitoring unit based on the first voltage data and the corrected first current data.
8. The apparatus of claim 6, further comprising:
the insulation resistance determining module is used for respectively determining the insulation resistance values of the positive pole and the negative pole of the power battery pack relative to the ground of the vehicle body based on a preset single-bridge-arm insulation detecting circuit when an insulation detecting instruction sent by the battery management unit is detected;
and the insulation state determining module is used for determining the insulation state of the power battery pack based on the insulation resistance value and reporting the insulation state to the battery management unit.
9. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the high voltage monitoring method as claimed in any one of the claims 1 to 5.
10. A high voltage monitoring system comprising a high voltage monitoring unit, a battery management unit, a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the high voltage monitoring method according to any one of claims 1 to 5 when executing the computer program.
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| CN202110099200.7A CN112937302A (en) | 2021-01-25 | 2021-01-25 | High-voltage monitoring method, device, storage medium and system |
| PCT/CN2022/073644 WO2022156805A1 (en) | 2021-01-25 | 2022-01-25 | High-voltage monitoring method and apparatus, storage medium and system |
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| CN202110099200.7A CN112937302A (en) | 2021-01-25 | 2021-01-25 | High-voltage monitoring method, device, storage medium and system |
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| WO2022156805A1 (en) * | 2021-01-25 | 2022-07-28 | 中国第一汽车股份有限公司 | High-voltage monitoring method and apparatus, storage medium and system |
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