CN113125968A - Method and apparatus for detecting battery state of hybrid vehicle - Google Patents
Method and apparatus for detecting battery state of hybrid vehicle Download PDFInfo
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- CN113125968A CN113125968A CN201911412406.XA CN201911412406A CN113125968A CN 113125968 A CN113125968 A CN 113125968A CN 201911412406 A CN201911412406 A CN 201911412406A CN 113125968 A CN113125968 A CN 113125968A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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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
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Abstract
Embodiments of the present invention relate to a method and apparatus for detecting a battery state of a hybrid vehicle, a hybrid powertrain control apparatus, a hybrid vehicle, and a computer-readable storage medium. The method comprises the following steps: when the hybrid vehicle is in a power generation working condition, carrying out bus fluctuation detection; the bus fluctuation detection includes: the method comprises the steps of reducing the generated power, detecting the voltage fluctuation condition of a high-voltage bus before and after the generated power is reduced, judging that the power battery is on-line if the voltage fluctuation condition is within a preset voltage fluctuation range, and judging that the power battery is off-line if the voltage fluctuation condition exceeds the preset voltage fluctuation range.
Description
Technical Field
The present specification relates to a hybrid vehicle technology, and more particularly, to a method of detecting a battery state of a hybrid vehicle, a detection apparatus of a battery state of a hybrid vehicle, a hybrid powertrain control apparatus, a hybrid vehicle, and a computer-readable storage medium.
Background
In order to effectively improve the fuel efficiency of automobiles and reduce the exhaust emission, more and more automobile manufacturers begin to popularize and research and develop hybrid vehicles. A Hybrid Electric Vehicle (HEV) refers to a Vehicle equipped with both an internal combustion engine and an Electric motor as power sources. Under the pure electric working condition, the power battery is the only high-voltage power supply, if the power battery is off-line due to reasons such as faults, all high-voltage electric parts (such as a motor controller, a high-voltage air conditioner, a DC-DC voltage converter and the like) can report faults in time, so that the hybrid vehicle can know the off-line of the power battery, and the hybrid vehicle is switched to an engine independent driving mode. However, in the power generation condition of the hybrid electric vehicle, the high-voltage power utilization component cannot sense the power battery offline, which can cause great threat to driving safety.
Disclosure of Invention
The present specification aims to provide a solution for detecting the online state of a battery of a hybrid vehicle, which can detect the online state of a power battery.
According to a first aspect provided by the present invention, there is provided a method of detecting a state of a battery for a hybrid vehicle, comprising the steps of:
when the hybrid vehicle is in a power generation working condition, carrying out bus fluctuation detection;
the bus fluctuation detection includes: the method comprises the steps of reducing the generated power, detecting the voltage fluctuation condition of a high-voltage bus before and after the generated power is reduced, judging that the power battery is on-line if the voltage fluctuation condition is within a preset voltage fluctuation range, and judging that the power battery is off-line if the voltage fluctuation condition exceeds the preset voltage fluctuation range.
Optionally, when the hybrid vehicle is in a power generation condition, performing bus fluctuation detection includes:
detecting the charging and discharging current of the power battery when the hybrid vehicle is in a power generation working condition;
judging that the power battery is on-line under the condition that the absolute value of the charging and discharging current of the power battery is larger than a preset current threshold;
and under the condition that the absolute value of the charging and discharging current of the power battery is less than or equal to the preset current threshold, carrying out bus fluctuation detection.
Optionally, the method further comprises:
when the hybrid vehicle is about to exit from the power generation working condition, carrying out bus fluctuation detection;
and if the detection result of the bus fluctuation detection performed when the hybrid vehicle is about to exit from the power generation working condition is that the power battery is on-line, controlling the hybrid vehicle to exit from the power generation working condition.
Optionally, the method further comprises:
and when the detection result of the bus fluctuation detection is that the power battery is offline, giving an alarm and/or controlling the hybrid vehicle to enter a limp home mode.
Optionally, the bus bar fluctuation detection includes:
performing a first detection step, the first detection step comprising: reducing the generated power by a preset reduction value, and detecting whether the voltage fluctuation condition of the high-voltage bus before and after the generated power is reduced at this time exceeds a preset voltage fluctuation range;
if the detection result of the first detection step is yes, judging that the power battery is off-line;
if the detection result of the first detection step is negative and the generated power is not reduced to the preset target power, executing the first detection step again;
and if the detection result of the first detection step is negative and the generated power is reduced to the preset target power, judging that the power battery is on line.
According to a second aspect provided by the present invention, there is provided a detection apparatus of a battery state of a hybrid vehicle, comprising a bus bar fluctuation detection module:
the bus fluctuation detection module is used for carrying out bus fluctuation detection when the hybrid electric vehicle is in a power generation working condition; the bus fluctuation detection includes: the method comprises the steps of reducing the generated power, detecting the voltage fluctuation condition of a high-voltage bus before and after the generated power is reduced, judging that the power battery is on-line if the voltage fluctuation condition is within a preset voltage fluctuation range, and judging that the power battery is off-line if the voltage fluctuation condition exceeds the preset voltage fluctuation range.
Optionally, the device further comprises a working condition management module;
the working condition management module is used for calling the bus fluctuation detection module to carry out bus fluctuation detection when the hybrid vehicle is about to exit from the power generation working condition; and if the detection result of the bus fluctuation detection performed when the hybrid vehicle is about to exit from the power generation working condition is that the power battery is on-line, controlling the hybrid vehicle to exit from the power generation working condition.
Optionally, the apparatus further comprises a fault handling module;
and the fault processing module is used for giving an alarm and/or controlling the hybrid vehicle to enter a limp-home mode when the detection result of the bus fluctuation detection is that the power battery is offline.
Optionally, the bus fluctuation detection module includes a first sub-module and a second sub-module;
the first sub-module is configured to perform a first detection step, where the first detection step includes: reducing the generated power by a preset reduction value, and detecting whether the voltage fluctuation condition of the high-voltage bus before and after the generated power is reduced at this time exceeds a preset voltage fluctuation range;
the second submodule is used for judging that the power battery is off-line if the detection result of the first detection step is positive; if the detection result of the first detection step is negative and the generated power is not reduced to the preset target power, calling the first sub-module again to execute the first detection step; and if the detection result of the first detection step is negative and the generated power is reduced to the preset target power, judging that the power battery is on line.
According to a third aspect of the present invention, there is provided a detection apparatus of a battery state of a hybrid vehicle, comprising a current detection module and a bus fluctuation detection module:
the current detection module is used for detecting the charging and discharging current of the power battery when the hybrid vehicle is in a power generation working condition; judging that the power battery is on-line under the condition that the absolute value of the charging and discharging current of the power battery is larger than a preset current threshold; calling the bus fluctuation detection module to perform bus fluctuation detection under the condition that the absolute value of the charging and discharging current of the power battery is less than or equal to the preset current threshold;
the bus fluctuation detection module is used for carrying out bus fluctuation detection; the bus fluctuation detection includes: the method comprises the steps of reducing the generated power, detecting the voltage fluctuation condition of a high-voltage bus before and after the generated power is reduced, judging that the power battery is on-line if the voltage fluctuation condition is within a preset voltage fluctuation range, and judging that the power battery is off-line if the voltage fluctuation condition exceeds the preset voltage fluctuation range.
Optionally, the device further comprises a working condition management module;
the working condition management module is used for calling the bus fluctuation detection module to carry out bus fluctuation detection when the hybrid vehicle is about to exit from the power generation working condition; and if the detection result of the bus fluctuation detection performed when the hybrid vehicle is about to exit from the power generation working condition is that the power battery is on-line, controlling the hybrid vehicle to exit from the power generation working condition.
Optionally, the apparatus further comprises a fault handling module;
and the fault processing module is used for giving an alarm and/or controlling the hybrid vehicle to enter a limp-home mode when the detection result of the bus fluctuation detection is that the power battery is offline.
Optionally, the bus fluctuation detection module includes a first sub-module and a second sub-module;
the first sub-module is configured to perform a first detection step, where the first detection step includes: reducing the generated power by a preset reduction value, and detecting whether the voltage fluctuation condition of the high-voltage bus before and after the generated power is reduced at this time exceeds a preset voltage fluctuation range;
the second submodule is used for judging that the power battery is off-line if the detection result of the first detection step is positive; if the detection result of the first detection step is negative and the generated power is not reduced to the preset target power, calling the first sub-module again to execute the first detection step; and if the detection result of the first detection step is negative and the generated power is reduced to the preset target power, judging that the power battery is on line.
According to a fourth aspect of the present invention, there is provided a detection apparatus for a battery state of a hybrid vehicle, comprising a memory and a processor; the memory stores instructions that, when executed by the processor, implement the method of any of the preceding claims.
According to a fifth aspect provided by the present invention, there is provided a hybrid powertrain control device comprising a memory and a processor; the memory stores instructions that, when executed by the processor, implement the method of any of the preceding claims.
According to a sixth aspect provided by the present invention, there is provided a hybrid vehicle including the detection apparatus of any one of the foregoing.
According to a seventh aspect of the present invention, there is provided a hybrid vehicle including the hybrid powertrain control apparatus of any one of the preceding claims.
According to an eighth aspect of the present invention there is provided a computer readable storage medium having stored thereon instructions which, when executed by a processor, implement the method of any one of the preceding claims.
The scheme for detecting the online state of the battery of the hybrid vehicle provided by the embodiment of the invention can accurately detect the online state of the power battery under the power generation working condition of the hybrid vehicle, thereby improving the driving safety.
Features of embodiments of the present specification and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the specification and together with the description, serve to explain the principles of the embodiments of the specification.
FIG. 1 is a schematic illustration of a hybrid powertrain system provided by one embodiment of the present disclosure;
FIG. 2 is a flow chart of a method for detecting a state of a battery of a hybrid vehicle according to one embodiment of the present disclosure;
FIG. 3 is a flow chart of a bus fluctuation detection process provided by one embodiment of the present description;
FIG. 4 is a flow chart of a method for detecting a state of a battery of a hybrid vehicle according to one embodiment of the present disclosure;
fig. 5 is a block diagram of a detection apparatus of a battery state of a hybrid vehicle according to an embodiment of the present specification;
fig. 6 is a block diagram of a detection apparatus of a battery state of a hybrid vehicle according to an embodiment of the present specification;
fig. 7 is a block diagram of a hybrid vehicle provided in an embodiment of the present specification;
fig. 8 is a block diagram of a hybrid vehicle according to an embodiment of the present specification.
Detailed Description
Various exemplary embodiments of the present specification will now be described in detail with reference to the accompanying drawings.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the embodiments, their application, or uses.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Hybrid vehicle is under the power generation operating mode, and the high-pressure generating line is supplied power by power battery and generator simultaneously, even power battery is because reasons such as trouble off-line, hybrid assembly also can't perceive, and this can cause very big threat for driving safety, perhaps leads to hybrid assembly shock even. The embodiment of the invention provides a detection scheme of the state of a power battery, which can detect the state of the power battery under the power generation working condition.
Referring to fig. 1, a hybrid powertrain system of a hybrid vehicle according to an embodiment of the present invention is briefly described, and the hybrid powertrain system mainly includes an engine 1, a generator 2, a power battery 3, a driving Motor 4, an engine Control Unit ecu (engine Control Unit)6, a generator Control Unit gcu (generator Control Unit)7, and a driving Motor controller (Motor Control Unit) 8. The hybrid powertrain system may further include a clutch and its related control unit, a transmission and its related control unit, and the like, which are not limited in this embodiment of the present invention.
In the embodiment of the present invention, the power generation condition refers to a state where the engine 1 drives the generator 2 to generate power. Under the power generation working condition, the voltage of the high-voltage bus is commonly maintained by the power battery and the generator.
In one embodiment, the motoring conditions may include a series power generation condition and an engine direct drive condition. The series power generation working condition is a mode that the engine 1 only drives the generator 2 to generate power and does not directly drive the wheel end. The engine direct drive operating mode refers to a mode in which the engine 1 drives the generator 2 to generate electricity and simultaneously directly drives the wheel end. Under both conditions, the engine 1 drives the generator 2 to generate electricity.
In the embodiment of the invention, the power battery is on-line, which means that the power battery can be normally applied. The power battery is offline, which means that the power battery cannot be normally used, and the reason for offline of the power battery may be that the power battery itself fails, or the connection between the power battery and the high-voltage bus is interrupted, for example, a DC-DC voltage converter connected between the power battery and the high-voltage bus fails, which results in the disconnection between the power battery and the high-voltage bus.
< method for detecting Battery State of hybrid vehicle >
< example one >
The method for detecting the battery state of the hybrid vehicle provided by one embodiment of the invention comprises the following steps:
502. and acquiring the working condition information of the hybrid vehicle in real time, and executing step 504 if the hybrid vehicle is in the power generation working condition currently.
In one particular example, the hybrid vehicle operating condition information may be obtained from a controller of the hybrid powertrain.
504. And carrying out bus fluctuation detection. The bus fluctuation detection comprises: the method comprises the steps of reducing the generated power, detecting the voltage fluctuation condition of a high-voltage bus before and after the generated power is reduced, judging that the power battery is on-line if the voltage fluctuation condition is within a preset voltage fluctuation range, and judging that the power battery is off-line if the voltage fluctuation condition exceeds the preset voltage fluctuation range.
In the condition that the power battery is not disconnected, if the generated power is suddenly reduced, the power battery can actively compensate the reduced power so as to maintain the voltage of the high-voltage bus. In the bus fluctuation detection, the generated power is reduced, and the voltage fluctuation condition of the high-voltage bus before and after the generated power is reduced is detected. And if the voltage fluctuation condition is within the preset voltage fluctuation range, the power battery provides compensation power, and the power battery is judged to be on-line. And if the voltage fluctuation condition exceeds the preset voltage fluctuation range, the power battery does not provide the compensation power, and the power battery is judged to be offline.
The preset voltage fluctuation range can be determined according to engineering experience values or experimental simulation values, and can also be determined by combining specific application scenes.
For a high-voltage bus, the voltage itself may have normal fluctuation, corresponding to a normal fluctuation range. The normal fluctuation range is generally related to the voltage of the high-voltage bus, for example, when the voltage of the high-voltage bus is 300V, the corresponding normal fluctuation range is 270V to 310V; when the voltage of the high-voltage bus is 200V, the corresponding normal fluctuation range is 180V-210V.
In a specific example, the normal fluctuation range corresponding to the voltage of the high-voltage bus before the generated power is reduced may be determined, and the normal fluctuation range may be set as the preset fluctuation range.
506. And judging whether the bus fluctuation detection result is that the power battery is on-line or not, and returning to the step 502 if the bus fluctuation detection result is that the power battery is on-line. If the bus fluctuation detection result is that the power battery is offline, step 508 is executed.
508. And under the condition that the bus fluctuation detection result is that the power battery is offline, alarming the power battery.
In one specific example, the warning may be implemented by an alarm indicator light corresponding to the power battery being illuminated or flashing. In one specific example, the alert may be implemented by voice broadcast.
In one specific example, in the case where the power battery is offline as a result of the bus fluctuation detection, the hybrid vehicle is switched to a Limp Home Mode (LHM). In the limp home mode, the hybrid vehicle can perform basic functions to travel at a minimum performance level, helping a driver to safely travel to a safe place.
The scheme for detecting the online state of the battery of the hybrid vehicle provided by the embodiment of the invention can accurately detect the online state of the power battery under the power generation working condition of the hybrid vehicle, thereby improving the driving safety.
< example two >
Referring to fig. 2, a method for detecting a state of a battery of a hybrid vehicle according to an embodiment of the present invention includes the steps of:
102. and acquiring the working condition information of the hybrid vehicle in real time, and executing step 104 if the hybrid vehicle is in the power generation working condition currently.
In one particular example, the hybrid vehicle operating condition information may be obtained from a controller of the hybrid powertrain.
104. And detecting the charging and discharging current of the power battery.
In a specific example, the battery management system BMS of the power battery detects the charging and discharging current of the power battery in real time, and step 104 only needs to read the charging and discharging current data of the power battery from the battery management system BMS.
106. And judging whether the absolute value of the charging and discharging current of the power battery is larger than a preset current threshold value. And if the absolute value of the charging and discharging current of the power battery is larger than the preset current threshold, judging that the power battery is on line, and returning to the step 102. And if the absolute value of the charging and discharging current of the power battery is less than or equal to the preset current threshold, executing step 108.
The current threshold may be determined according to engineering experience values or experimental simulation values, or may be determined in combination with a specific application scenario. In a specific example, the current threshold is set to a value slightly larger than the detection accuracy of the charge and discharge current, for example, the detection accuracy of the charge and discharge current is 1 ampere, and the current threshold may be set to 2 amperes or 3 amperes.
In this step, if the absolute value of the charging and discharging current of the power battery is greater than the current threshold, it indicates that the power battery is currently charging or discharging, and the power battery is online. If the absolute value of the charging and discharging current of the power battery is less than or equal to the preset current threshold, the power battery may be offline, or the power battery may be in a state of not being charged or not being discharged.
108. And under the condition that the absolute value of the charging and discharging current of the power battery is less than or equal to a preset current threshold, carrying out bus fluctuation detection.
The bus fluctuation detection comprises: the method comprises the steps of reducing the generated power, detecting the voltage fluctuation condition of a high-voltage bus before and after the generated power is reduced, judging that the power battery is on-line if the voltage fluctuation condition is within a preset voltage fluctuation range, and judging that the power battery is off-line if the voltage fluctuation condition exceeds the preset voltage fluctuation range.
In this embodiment, the purpose of the bus-bar fluctuation detection is to eliminate the possibility that the power battery is in a state of not being charged and not being discharged. In the condition that the power battery is not disconnected, if the generated power is suddenly reduced, the power battery can actively compensate the reduced power so as to maintain the voltage of the high-voltage bus. In the bus fluctuation detection, the generated power is reduced, and the voltage fluctuation condition of the high-voltage bus before and after the generated power is reduced is detected. And if the voltage fluctuation condition is within the preset voltage fluctuation range, the power battery provides compensation power, and the power battery is judged to be on-line. And if the voltage fluctuation condition exceeds the preset voltage fluctuation range, the power battery does not provide the compensation power, and the power battery is judged to be offline.
The preset voltage fluctuation range can be determined according to engineering experience values or experimental simulation values, and can also be determined by combining specific application scenes.
For a high-voltage bus, the voltage itself may have normal fluctuation, corresponding to a normal fluctuation range. The normal fluctuation range is generally related to the voltage of the high-voltage bus, for example, when the voltage of the high-voltage bus is 300V, the corresponding normal fluctuation range is 270V to 310V; when the voltage of the high-voltage bus is 200V, the corresponding normal fluctuation range is 180V-210V.
In a specific example, the normal fluctuation range corresponding to the voltage of the high-voltage bus before the generated power is reduced may be determined, and the normal fluctuation range may be set as the preset fluctuation range.
110. And judging whether the bus fluctuation detection result is that the power battery is on-line or not, and returning to the step 102 if the bus fluctuation detection result is that the power battery is on-line. If the bus fluctuation detection result is that the power battery is offline, step 112 is executed.
112. And under the condition that the bus fluctuation detection result is that the power battery is offline, alarming the power battery.
In one specific example, the warning may be implemented by an alarm indicator light corresponding to the power battery being illuminated or flashing. In one specific example, the alert may be implemented by voice broadcast.
In one specific example, in the case where the power battery is offline as a result of the bus fluctuation detection, the hybrid vehicle is switched to the limp home mode. In the limp home mode, the hybrid vehicle can perform basic functions to travel at a minimum performance level, helping a driver to safely travel to a safe place.
The scheme for detecting the online state of the battery of the hybrid vehicle provided by the embodiment of the invention can accurately detect the online state of the power battery under the power generation working condition of the hybrid vehicle, thereby improving the driving safety.
According to the scheme for detecting the online state of the battery of the hybrid vehicle, provided by the embodiment of the invention, only under the condition that the power battery is possibly suspected to be offline according to the initial judgment of the charging and discharging current of the power battery, whether the power battery is offline is accurately determined through bus fluctuation detection, the overall calculation amount is small, and the detection process is safer.
Referring to fig. 3, an embodiment of the present invention provides a bus fluctuation detection method, including the following steps:
302. and reducing the generated power by a preset reduction value, and detecting the voltage fluctuation condition of the high-voltage bus before and after the generated power is reduced at this time.
304. And judging whether the voltage fluctuation condition of the high-voltage bus before and after the generated power is reduced at this time exceeds a preset voltage fluctuation range. If the voltage exceeds the preset value, the power battery is offline. If not, step 306 is performed.
306. It is determined whether the generated power is reduced to the target power or less. If the generated power does not drop below the target power, return to step 302. And if the generated power is reduced to the target power or below, finishing the bus fluctuation detection and judging that the power battery is on line.
In this embodiment, the target power may be set according to the original generated power, and the reduction value may be set according to the original generated power and the target power. For example, the primary generated power is 80 kilowatts, the target power is set to 79.5 kilowatts, and the reduction is set to 100 watts.
In this embodiment, by setting the target power and the reduction value, whether the power battery is online or not is judged by adopting a gradual heuristic method, which is relatively safer, so that the situation that the power battery cannot provide the compensation power when being offline and causes adverse effects due to the fact that the generated power is reduced too much at one time can be prevented.
< example three >
Referring to fig. 4, a method for detecting a state of a battery of a hybrid vehicle according to an embodiment of the present invention includes the steps of:
202. and judging whether the hybrid vehicle is to exit from the power generation working condition or not.
In one particular example, information may be obtained from a controller of the hybrid powertrain as to whether the hybrid vehicle is to exit the power generating mode.
204. And if the hybrid vehicle is about to exit from the power generation working condition, carrying out bus fluctuation detection.
In this embodiment, the specific process of bus fluctuation detection can be referred to in the relevant content of the foregoing embodiments, and will not be described repeatedly here.
206. And judging whether the bus fluctuation detection result is that the power battery is on-line. If the bus fluctuation detection result is that the power battery is online, step 208 is executed. If the detection result of the bus fluctuation detection is that the power battery is online, step 210 is executed.
208. And controlling the hybrid vehicle to normally exit from the power generation working condition under the condition that the bus fluctuation detection result is that the power battery is on line.
210. And under the condition that the bus fluctuation detection result is that the power battery is offline, alarming the power battery.
In this embodiment, the manner of performing the power battery alarm may refer to the related contents of the foregoing embodiments, and will not be described repeatedly here.
In one specific example, in the case where the power battery is offline as a result of the bus fluctuation detection, the hybrid vehicle is switched to the limp home mode. In the limp home mode, the hybrid vehicle can perform basic functions to travel at a minimum performance level, helping a driver to safely travel to a safe place.
The scheme for detecting the battery online state of the hybrid vehicle provided by the embodiment of the invention can detect the online state of the power battery before the hybrid vehicle is about to exit from the power generation working condition, and then control the hybrid vehicle to normally exit from the power generation working condition under the condition that the power battery is determined to be online, so that the driving safety is improved.
< detection apparatus for Battery State of hybrid vehicle >
< example one >
The detection device for the battery state of the hybrid vehicle provided by one embodiment of the invention comprises a bus fluctuation detection module.
The bus fluctuation detection module is used for carrying out bus fluctuation detection when the hybrid vehicle is in a power generation working condition; the bus fluctuation detection comprises: the method comprises the steps of reducing the generated power, detecting the voltage fluctuation condition of a high-voltage bus before and after the generated power is reduced, judging that the power battery is on-line if the voltage fluctuation condition is within a preset voltage fluctuation range, and judging that the power battery is off-line if the voltage fluctuation condition exceeds the preset voltage fluctuation range.
In a specific example, the detection device further comprises a fault handling module.
And the fault processing module is used for giving an alarm and/or controlling the hybrid vehicle to enter a limp-home mode when the detection result of the bus fluctuation detection is that the power battery is offline.
In one particular example, the bus ripple detection module includes a first sub-module and a second sub-module.
A first sub-module for performing a first detection step, the first detection step comprising: and reducing the generated power by a preset reduction value, and detecting whether the voltage fluctuation condition of the high-voltage bus before and after the generated power is reduced at this time exceeds a preset voltage fluctuation range.
The second submodule is used for judging that the power battery is off-line if the detection result of the first detection step is positive; if the detection result of the first detection step is negative and the generated power is not reduced to the preset target power, calling the first sub-module again to execute the first detection step; and if the detection result of the first detection step is negative and the generated power is reduced to the preset target power, judging that the power battery is on line.
< example two >
Referring to fig. 5, a detection apparatus 100 for detecting a battery state of a hybrid vehicle according to an embodiment of the present invention includes the following modules:
the current detection module 10 is used for detecting the charging and discharging current of the power battery when the hybrid vehicle is in a power generation working condition; under the condition that the absolute value of the charging and discharging current of the power battery is larger than a preset current threshold, judging that the power battery is on line; and calling the bus fluctuation detection module 20 to perform bus fluctuation detection under the condition that the absolute value of the charging and discharging current of the power battery is less than or equal to a preset current threshold.
The bus fluctuation detection module 20 is used for carrying out bus fluctuation detection; the bus fluctuation detection comprises: the method comprises the steps of reducing the generated power, detecting the voltage fluctuation condition of a high-voltage bus before and after the generated power is reduced, judging that the power battery is on-line if the voltage fluctuation condition is within a preset voltage fluctuation range, and judging that the power battery is off-line if the voltage fluctuation condition exceeds the preset voltage fluctuation range.
In a specific example, the detection apparatus 100 further includes a fault handling module.
And the fault processing module is used for giving an alarm and/or controlling the hybrid vehicle to enter a limp-home mode when the detection result of the bus fluctuation detection is that the power battery is offline.
In one particular example, the bus ripple detection module 20 includes a first sub-module and a second sub-module.
A first sub-module for performing a first detection step, the first detection step comprising: and reducing the generated power by a preset reduction value, and detecting whether the voltage fluctuation condition of the high-voltage bus before and after the generated power is reduced at this time exceeds a preset voltage fluctuation range.
The second submodule is used for judging that the power battery is off-line if the detection result of the first detection step is positive; if the detection result of the first detection step is negative and the generated power is not reduced to the preset target power, calling the first sub-module again to execute the first detection step; and if the detection result of the first detection step is negative and the generated power is reduced to the preset target power, judging that the power battery is on line.
< example three >
Referring to fig. 6, a detection apparatus 200 for detecting a battery state of a hybrid vehicle according to an embodiment of the present invention includes the following modules:
the current detection module 10 is used for detecting the charging and discharging current of the power battery when the hybrid vehicle is in a power generation working condition; under the condition that the absolute value of the charging and discharging current of the power battery is larger than a preset current threshold, judging that the power battery is on line; and calling the bus fluctuation detection module 20 to perform bus fluctuation detection under the condition that the absolute value of the charging and discharging current of the power battery is less than or equal to a preset current threshold.
The bus fluctuation detection module 20 is used for carrying out bus fluctuation detection; bus fluctuation detection, including: the method comprises the steps of reducing the generated power, detecting the voltage fluctuation condition of a high-voltage bus before and after the generated power is reduced, judging that the power battery is on-line if the voltage fluctuation condition is within a preset voltage fluctuation range, and judging that the power battery is off-line if the voltage fluctuation condition exceeds the preset voltage fluctuation range.
The working condition management module 30 is used for calling the bus fluctuation detection module 20 to perform bus fluctuation detection when the hybrid vehicle is about to exit from the power generation working condition; and controlling the hybrid vehicle to exit the power generation condition if the detection result of the bus fluctuation detection performed when the hybrid vehicle is about to exit the power generation condition is that the power battery is on-line.
In a specific example, the detection apparatus 100 further includes a fault handling module.
And the fault processing module is used for giving an alarm and/or controlling the hybrid vehicle to enter a limp-home mode when the detection result of the bus fluctuation detection is that the power battery is offline.
In one particular example, the bus ripple detection module 20 includes a first sub-module and a second sub-module.
A first sub-module for performing a first detection step, the first detection step comprising: and reducing the generated power by a preset reduction value, and detecting whether the voltage fluctuation condition of the high-voltage bus before and after the generated power is reduced at this time exceeds a preset voltage fluctuation range.
The second submodule is used for judging that the power battery is off-line if the detection result of the first detection step is positive; if the detection result of the first detection step is negative and the generated power is not reduced to the preset target power, calling the first sub-module again to execute the first detection step; and if the detection result of the first detection step is negative and the generated power is reduced to the preset target power, judging that the power battery is on line.
< example four >
The detection device for the battery state of the hybrid vehicle provided by one embodiment of the invention comprises a memory and a processor; the memory stores instructions that, when executed by the processor, implement a method as disclosed in any of the foregoing embodiments.
< hybrid powertrain control device >
The invention provides a hybrid powertrain control device, comprising a memory and a processor; the memory stores instructions that, when executed by the processor, implement a method as disclosed in any of the foregoing embodiments.
< hybrid vehicle >
Referring to fig. 7, a hybrid vehicle according to an embodiment of the present invention includes a device for detecting a battery state of a hybrid vehicle disclosed in any of the foregoing embodiments.
Referring to fig. 8, a hybrid vehicle according to an embodiment of the present invention includes a hybrid powertrain control apparatus disclosed in any of the foregoing embodiments.
< computer-readable storage Medium >
An embodiment of the present invention provides a computer-readable storage medium having stored thereon instructions that, when executed by a processor, implement a method disclosed in any of the foregoing embodiments.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the device, vehicle and media embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference may be made to some descriptions of the method embodiments for relevant points.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Embodiments of the present description may be systems, methods, and/or computer program products. The computer program product may include a computer-readable storage medium having computer-readable program computer instructions embodied thereon for causing a processor to implement aspects of embodiments of the specification.
The computer readable storage medium may be a tangible device that can hold and store computer instructions for use by a computer instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as a punch card or an in-groove protrusion structure having computer instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.
The computer-readable program computer instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives the computer-readable program computer instructions from the network and forwards the computer-readable program computer instructions for storage in a computer-readable storage medium in the respective computing/processing device.
The computer program computer instructions for carrying out operations for embodiments of the present description may be compiled computer instructions, computer Instruction Set Architecture (ISA) computer instructions, machine-related computer instructions, microcode, firmware computer instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program computer instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, the electronic circuitry can execute computer-readable program computer instructions to implement aspects of embodiments of the present specification by utilizing state information of the computer-readable program computer instructions to personalize the electronic circuitry, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA).
Aspects of embodiments of the present specification are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the specification. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer readable program computer instructions.
These computer-readable program computer instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer readable program computer instructions may also be stored in a computer readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer readable medium storing the computer instructions includes an article of manufacture including computer instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer readable program computer instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the computer instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present description. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of computer instructions, which comprises one or more executable computer instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. It is well known to those skilled in the art that the implementation is by hardware, by software
The implementation of the formula and the implementation by means of a combination of software and hardware are equivalent.
The foregoing description of the embodiments of the present specification has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (14)
1. A method of detecting a state of a battery of a hybrid vehicle, comprising the steps of:
when the hybrid vehicle is in a power generation working condition, carrying out bus fluctuation detection;
the bus fluctuation detection includes: the method comprises the steps of reducing the generated power, detecting the voltage fluctuation condition of a high-voltage bus before and after the generated power is reduced, judging that the power battery is on-line if the voltage fluctuation condition is within a preset voltage fluctuation range, and judging that the power battery is off-line if the voltage fluctuation condition exceeds the preset voltage fluctuation range.
2. The method of claim 1, wherein performing bus fluctuation detection while the hybrid vehicle is in a power generation condition comprises:
detecting the charging and discharging current of the power battery when the hybrid vehicle is in a power generation working condition;
judging that the power battery is on-line under the condition that the absolute value of the charging and discharging current of the power battery is larger than a preset current threshold;
and under the condition that the absolute value of the charging and discharging current of the power battery is less than or equal to the preset current threshold, carrying out bus fluctuation detection.
3. The method of claim 1, further comprising:
when the hybrid vehicle is about to exit from the power generation working condition, carrying out bus fluctuation detection;
and if the detection result of the bus fluctuation detection performed when the hybrid vehicle is about to exit from the power generation working condition is that the power battery is on-line, controlling the hybrid vehicle to exit from the power generation working condition.
4. The method of any of claims 1-3, further comprising:
and when the detection result of the bus fluctuation detection is that the power battery is offline, giving an alarm and/or controlling the hybrid vehicle to enter a limp home mode.
5. The method of any of claims 1-3, the bus fluctuation detection, comprising:
performing a first detection step, the first detection step comprising: reducing the generated power by a preset reduction value, and detecting whether the voltage fluctuation condition of the high-voltage bus before and after the generated power is reduced at this time exceeds a preset voltage fluctuation range;
if the detection result of the first detection step is yes, judging that the power battery is off-line;
if the detection result of the first detection step is negative and the generated power is not reduced to the preset target power, executing the first detection step again;
and if the detection result of the first detection step is negative and the generated power is reduced to the preset target power, judging that the power battery is on line.
6. A detection device for battery state of a hybrid vehicle includes a bus fluctuation detection module:
the bus fluctuation detection module is used for carrying out bus fluctuation detection when the hybrid electric vehicle is in a power generation working condition; the bus fluctuation detection includes: the method comprises the steps of reducing the generated power, detecting the voltage fluctuation condition of a high-voltage bus before and after the generated power is reduced, judging that the power battery is on-line if the voltage fluctuation condition is within a preset voltage fluctuation range, and judging that the power battery is off-line if the voltage fluctuation condition exceeds the preset voltage fluctuation range.
7. A detection device for battery state of a hybrid vehicle comprises a current detection module and a bus fluctuation detection module:
the current detection module is used for detecting the charging and discharging current of the power battery when the hybrid vehicle is in a power generation working condition; judging that the power battery is on-line under the condition that the absolute value of the charging and discharging current of the power battery is larger than a preset current threshold; calling the bus fluctuation detection module to perform bus fluctuation detection under the condition that the absolute value of the charging and discharging current of the power battery is less than or equal to the preset current threshold;
the bus fluctuation detection module is used for carrying out bus fluctuation detection; the bus fluctuation detection includes: the method comprises the steps of reducing the generated power, detecting the voltage fluctuation condition of a high-voltage bus before and after the generated power is reduced, judging that the power battery is on-line if the voltage fluctuation condition is within a preset voltage fluctuation range, and judging that the power battery is off-line if the voltage fluctuation condition exceeds the preset voltage fluctuation range.
8. The apparatus of claim 6 or 7, further comprising a condition management module;
the working condition management module is used for calling the bus fluctuation detection module to carry out bus fluctuation detection when the hybrid vehicle is about to exit from the power generation working condition; and if the detection result of the bus fluctuation detection performed when the hybrid vehicle is about to exit from the power generation working condition is that the power battery is on-line, controlling the hybrid vehicle to exit from the power generation working condition.
9. The apparatus of any of claims 6-8, further comprising a fault handling module;
and the fault processing module is used for giving an alarm and/or controlling the hybrid vehicle to enter a limp-home mode when the detection result of the bus fluctuation detection is that the power battery is offline.
10. The apparatus of any of claims 6-8, the bus ripple detection module comprising a first sub-module and a second sub-module;
the first sub-module is configured to perform a first detection step, where the first detection step includes: reducing the generated power by a preset reduction value, and detecting whether the voltage fluctuation condition of the high-voltage bus before and after the generated power is reduced at this time exceeds a preset voltage fluctuation range;
the second submodule is used for judging that the power battery is off-line if the detection result of the first detection step is positive; if the detection result of the first detection step is negative and the generated power is not reduced to the preset target power, calling the first sub-module again to execute the first detection step; and if the detection result of the first detection step is negative and the generated power is reduced to the preset target power, judging that the power battery is on line.
11. A detection device for battery state of a hybrid vehicle comprises a memory and a processor; the memory stores instructions that, when executed by the processor, implement the method of any of claims 1-5.
12. A hybrid powertrain control device includes a memory and a processor; the memory stores instructions that, when executed by the processor, implement the method of any of claims 1-5.
13. A hybrid vehicle comprising the detection apparatus of any one of claims 6 to 11 or comprising the hybrid powertrain control apparatus of claim 12.
14. A computer readable storage medium having stored thereon instructions which, when executed by a processor, implement the method of any of claims 1-5.
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