CN113125968B - Method and device for detecting battery status of hybrid electric vehicle - Google Patents

Abstract

Embodiments of the present invention relate to a method and device for detecting a battery state of a hybrid electric vehicle, a hybrid powertrain control device, a hybrid electric vehicle, and a computer-readable storage medium. The method includes: when the hybrid vehicle is in a power generation condition, performing busbar fluctuation detection; the busbar fluctuation detection includes: reducing the power generation power and detecting the voltage fluctuation of the high-voltage bus before and after the reduction of the power generation power. If the voltage fluctuation range is within the range, the power battery is judged to be online, and if the voltage fluctuation exceeds the preset voltage fluctuation range, the power battery is judged to be offline.

Description

Method and device for detecting battery status of hybrid electric vehicle

technical field

This specification relates to hybrid vehicle technology, and more particularly, to a method for detecting a battery state of a hybrid vehicle, a device for detecting a battery state of a hybrid vehicle, a hybrid powertrain control device, a hybrid vehicle, and a computer-readable storage medium.

Background technique

In order to effectively improve the fuel efficiency of automobiles and reduce exhaust emissions, more and more automobile manufacturers have begun to promote 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 a power source. Under the pure electric condition of the hybrid vehicle, the power battery is the only high-voltage power supply. If the power battery is offline due to failure or other reasons, the high-voltage electrical components (such as motor controllers, high-voltage air conditioners, DC-DC voltage converters, etc.) The fault will be reported in time, so that the hybrid vehicle can know that the power battery is offline, so as to switch to the engine-only driving mode. However, under the condition of power generation, the high-voltage electrical components cannot sense that the power battery is offline, which will pose a great threat to driving safety.

SUMMARY OF THE INVENTION

The purpose of this specification is to provide a solution for detecting the online state of the battery of a hybrid vehicle, which can detect the online state of the power battery.

According to the first aspect provided by the present invention, a method for detecting the state of a battery of a hybrid electric vehicle is provided, comprising the following steps:

When the hybrid vehicle is in the power generation condition, the busbar fluctuation detection is carried out;

The busbar fluctuation detection includes: reducing the power generation and detecting the voltage fluctuation of the high-voltage bus before and after the reduction of the generated power. If the voltage fluctuation is within the preset voltage fluctuation range, it is judged that the power battery is online, and if the voltage fluctuation exceeds the preset voltage fluctuation. Set the voltage fluctuation range to determine that the power battery is offline.

Optionally, performing busbar fluctuation detection when the hybrid electric vehicle is in a power generation condition, including:

When the hybrid vehicle is in the power generation condition, the charging and discharging current of the power battery is detected;

In the case that the absolute value of the charging and discharging current of the power battery is greater than the preset current threshold, it is determined that the power battery is online;

The busbar fluctuation detection is performed when the absolute value of the charging and discharging current of the power battery is less than or equal to the preset current threshold.

Optionally, the method further includes:

When the hybrid vehicle is about to exit the power generation condition, the busbar fluctuation detection is performed;

If the detection result of the busbar fluctuation detection performed when the hybrid electric vehicle is about to exit the power generation condition is that the power battery is online, the hybrid electric vehicle is controlled to exit the power generation condition.

Optionally, the method further includes:

When the detection result of the busbar fluctuation detection is that the power battery is offline, an alarm is performed and/or the hybrid electric vehicle is controlled to enter a limp mode.

Optionally, the busbar fluctuation detection includes:

Performing a first detection step, the first detection step includes: reducing the power generation by a preset reduction value, and detecting whether the voltage fluctuation of the high-voltage bus before and after the reduction of the generated power this time exceeds a preset voltage fluctuation range;

If the detection result of the first detection step is yes, it is judged that the power battery is offline;

If the detection result of the first detection step is no and the generated power is not reduced to the preset target power, perform the first detection step again;

If the detection result of the first detection step is negative and the generated power is reduced to a preset target power, it is determined that the power battery is online.

According to the second aspect provided by the present invention, a device for detecting the battery state of a hybrid electric vehicle is provided, including a busbar fluctuation detection module:

The busbar fluctuation detection module is used to detect the busbar fluctuation when the hybrid vehicle is in a power generation condition; the busbar fluctuation detection includes: reducing the power generation and detecting the voltage fluctuation of the high-voltage bus before and after the reduction of the power generation, if If the voltage fluctuation is within the preset voltage fluctuation range, it is determined that the power battery is online, and if the voltage fluctuation exceeds the preset voltage fluctuation range, the power battery is determined to be offline.

Optionally, the device further includes a working condition management module;

The operating condition management module is used to call the busbar fluctuation detection module to perform busbar fluctuation detection when the hybrid electric vehicle is about to exit the power generation condition; The detection result of the fluctuation detection is that the power battery is online, and the hybrid electric vehicle is controlled to exit the power generation condition.

Optionally, the device further includes a fault handling module;

The fault handling module is configured to give an alarm and/or control the hybrid electric vehicle to enter a limp mode when the detection result of the busbar fluctuation detection is that the power battery is offline.

Optionally, the busbar fluctuation detection module includes a first submodule and a second submodule;

The first sub-module is used to perform a first detection step, and the first detection step includes: reducing the power generation by a preset reduction value, and detecting whether the voltage fluctuation of the high-voltage bus before and after the reduction of the power generation exceeds the limit. the preset voltage fluctuation range;

The second sub-module is used to judge that the power battery is offline if the detection result of the first detection step is yes; if the detection result of the first detection step is NO and the generated power is not reduced to the preset target power, call the power battery again. The first sub-module executes the first detection step; if the detection result of the first detection step is negative and the generated power is reduced to a preset target power, it is determined that the power battery is online.

According to the third aspect provided by the present invention, a detection device for the battery state of a hybrid electric vehicle is provided, including a current detection module and a busbar fluctuation detection module:

The current detection module is used to detect the charging and discharging current of the power battery when the hybrid electric vehicle is in a power generation condition; when the absolute value of the charging and discharging current of the power battery is greater than a preset current threshold, determine the The power battery is online; when the absolute value of the charging and discharging current of the power battery is less than or equal to the preset current threshold, the busbar fluctuation detection module is called to detect the busbar fluctuation;

The busbar fluctuation detection module is used for busbar fluctuation detection; the busbar fluctuation detection includes: reducing the generating power and detecting the voltage fluctuation of the high-voltage bus before and after reducing the generating power, if the voltage fluctuation is within a preset voltage fluctuation range , determine that the power battery is online, and if the voltage fluctuation exceeds the preset voltage fluctuation range, determine that the power battery is offline.

Optionally, the device further includes a working condition management module;

The operating condition management module is used to call the busbar fluctuation detection module to perform busbar fluctuation detection when the hybrid electric vehicle is about to exit the power generation condition; The detection result of the fluctuation detection is that the power battery is online, and the hybrid electric vehicle is controlled to exit the power generation condition.

Optionally, the device further includes a fault handling module;

The fault handling module is configured to give an alarm and/or control the hybrid electric vehicle to enter a limp mode when the detection result of the busbar fluctuation detection is that the power battery is offline.

Optionally, the busbar fluctuation detection module includes a first submodule and a second submodule;

The first sub-module is used to perform a first detection step, and the first detection step includes: reducing the power generation by a preset reduction value, and detecting whether the voltage fluctuation of the high-voltage bus before and after the reduction of the power generation exceeds the limit. the preset voltage fluctuation range;

The second sub-module is used to judge that the power battery is offline if the detection result of the first detection step is yes; if the detection result of the first detection step is NO and the generated power is not reduced to the preset target power, call the power battery again. The first sub-module executes the first detection step; if the detection result of the first detection step is negative and the generated power is reduced to a preset target power, it is determined that the power battery is online.

According to a fourth aspect provided by the present invention, a device for detecting a battery state of a hybrid electric vehicle is provided, comprising a memory and a processor; the memory stores instructions, and when the instructions are executed by the processor, any one of the foregoing descriptions is implemented. Methods.

According to a fifth aspect provided by the present invention, a hybrid powertrain control device is provided, including a memory and a processor; the memory stores instructions, and when the instructions are executed by the processor, implement any of the methods described above .

According to a sixth aspect provided by the present invention, a hybrid vehicle is provided, including the detection device described in any one of the foregoing.

According to a seventh aspect provided by the present invention, a hybrid vehicle is provided, including the hybrid powertrain control device described in any one of the foregoing.

According to an eighth aspect provided by the present invention, there is provided a computer-readable storage medium having instructions stored thereon, and when the instructions are executed by a processor, implement any of the aforementioned methods.

The solution for detecting the online state of the battery of the hybrid electric vehicle provided by the embodiment of the present invention can accurately detect the online state of the power battery under the power generation condition of the hybrid electric vehicle, thereby improving the driving safety.

Features and advantages of the embodiments of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings.

Description of 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 diagram of a hybrid powertrain system provided by an embodiment of the present specification;

FIG. 2 is a flowchart of a method for detecting a battery state of a hybrid electric vehicle provided by an embodiment of the present specification;

3 is a flowchart of a detection process for busbar fluctuation detection provided by an embodiment of the present specification;

FIG. 4 is a flowchart of a method for detecting a battery state of a hybrid electric vehicle provided by an embodiment of the present specification;

FIG. 5 is a block diagram of an apparatus for detecting a battery state of a hybrid electric vehicle provided by an embodiment of the present specification;

6 is a block diagram of an apparatus for detecting a battery state of a hybrid electric vehicle provided by an embodiment of the present specification;

FIG. 7 is a block diagram of a hybrid vehicle provided by an embodiment of the present specification;

FIG. 8 is a block diagram of a hybrid vehicle provided by an embodiment of the present specification.

Detailed ways

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 of the specification and its application or use.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

Under the power generation condition of the hybrid vehicle, the high-voltage bus is powered by the power battery and the generator at the same time. Even if the power battery is offline due to failure or other reasons, the hybrid powertrain cannot perceive it, which will pose a great threat to driving safety, and even some May cause hybrid powertrain shock. The embodiments of the present invention provide a solution for detecting the state of the power battery, which can detect the state of the power battery under the power generation condition.

Referring to FIG. 1 , a hybrid powertrain system of a hybrid vehicle provided by an embodiment of the present invention is briefly introduced. The hybrid powertrain system mainly includes an engine 1 , a generator 2 , a power battery 3 , a drive motor 4 , and an engine control system. A generator ECU (Engine Control Unit) 6 , a generator controller GCU (Generator Control Unit) 7 , and a drive 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, etc., which are not limited in the embodiment of the present invention.

In the embodiment of the present invention, the power generation condition refers to a state in which the engine 1 drives the generator 2 to generate power. In the power generation condition, the voltage of the high-voltage bus is maintained by the power battery and the generator.

In one embodiment, the launch conditions may include series power generation conditions and direct engine drive conditions. The series power generation condition refers to the mode in which the engine 1 only drives the generator 2 to generate electricity, and does not directly drive the wheel end. The engine direct drive condition refers to the mode in which the engine 1 drives the generator 2 to generate electricity and directly drives the wheel end at the same time. In these two working conditions, the engine 1 will drive the generator 2 to generate electricity.

In the embodiment of the present invention, the power battery is online means that the power battery can be used normally. The power battery offline means that the power battery cannot be used normally. The reason for the power battery offline may be that the power battery itself is faulty, or the connection between the power battery and the high-voltage bus is interrupted. For example, the connection between the power battery and the high-voltage bus The failure of the DC-DC voltage converter resulted in the interruption of the connection between the power battery and the high-voltage bus.

<Method for Detecting Hybrid Vehicle Battery Status>

<Example 1>

A method for detecting a battery state of a hybrid electric vehicle provided by an embodiment of the present invention includes the following steps:

502 . Acquire working condition information of the hybrid electric vehicle in real time. If the hybrid electric vehicle is currently in a power generation condition, perform step 504 .

In a specific example, the operating condition information of the hybrid vehicle may be obtained from the controller of the hybrid powertrain.

504. Perform busbar fluctuation detection. The busbar fluctuation detection includes: reducing the generating power, detecting the voltage fluctuation of the high-voltage bus before and after reducing the generating power, if the voltage fluctuation is within the preset voltage fluctuation range, judging that the power battery is online, if the voltage fluctuation exceeds the preset voltage fluctuation range. , judge that the power battery is offline.

In the case that the power battery is not disconnected, if the power generation is suddenly reduced, the power battery will actively compensate for this part of the reduced power to maintain the voltage of the high-voltage bus. In the busbar fluctuation detection, the power generation is reduced, and the voltage fluctuation of the high-voltage busbar before and after the reduction of the generated power is detected. If the voltage fluctuation is within the preset voltage fluctuation range, it means that the power battery provides compensation power, and the power battery is judged to be online. If the voltage fluctuation exceeds the preset voltage fluctuation range, it means that the power battery does not provide compensation power, and the power battery is judged to be offline.

The preset voltage fluctuation range may be determined according to engineering experience values or experimental simulation values, and may also be determined in combination with specific application scenarios.

For the high-voltage bus, the voltage itself may have normal fluctuations, corresponding to a normal fluctuation range. The normal fluctuation range is usually 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 to 210V.

In a specific example, the corresponding normal fluctuation range may be determined according to the voltage of the high-voltage bus before the power generation is reduced, and the normal fluctuation range may be set as the preset fluctuation range.

506. Determine whether the result of the bus fluctuation detection indicates that the power battery is online, and if the result of the bus fluctuation detection indicates that the power battery is online, return to step 502. If the result of the bus bar fluctuation detection is that the power battery is offline, step 508 is executed.

508. In the case that the result of the bus bar fluctuation detection is that the power battery is offline, perform a power battery alarm.

In a specific example, the warning can be realized by lighting or flashing the warning indicator light corresponding to the power battery. In a specific example, the alarm can be implemented through voice broadcast.

In a specific example, in the case that the power battery is offline as a result of the busbar fluctuation detection, the hybrid electric vehicle is switched to the Limp Home Mode (LHM). In limp mode, the hybrid is able to perform basic functions, driving at a minimum performance level to help the driver get to a safe place safely.

The solution for detecting the online state of the battery of the hybrid electric vehicle provided by the embodiment of the present invention can accurately detect the online state of the power battery under the power generation condition of the hybrid electric vehicle, thereby improving the driving safety.

<Example 2>

Referring to FIG. 2, a method for detecting a battery state of a hybrid electric vehicle provided by an embodiment of the present invention includes the following steps:

102. Acquire working condition information of the hybrid electric vehicle in real time. If the hybrid electric vehicle is currently in a power generation working condition, perform step 104.

In a specific example, the operating condition information of the hybrid vehicle may be obtained from the controller of the hybrid powertrain.

104. Detect 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. Determine whether the absolute value of the charging and discharging current of the power battery is greater than a preset current threshold. If the absolute value of the charging and discharging current of the power battery is greater than the preset current threshold, it is determined that the power battery is online, and the process returns to step 102 . If the absolute value of the charging and discharging current of the power battery is less than or equal to the preset current threshold, step 108 is performed.

The current threshold can be determined according to engineering experience values or experimental simulation values, and can also be determined in combination with specific application scenarios. In a specific example, the current threshold is set to a value slightly larger than the detection accuracy of the charging and discharging current. For example, the detection accuracy of the charging and discharging current is 1 ampere, and the current threshold value can 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 means that the power battery is currently being charged or discharged, 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 neither charging nor discharging.

108. Perform busbar fluctuation detection when the absolute value of the charging and discharging current of the power battery is less than or equal to a preset current threshold.

The busbar fluctuation detection includes: reducing the generating power, detecting the voltage fluctuation of the high-voltage bus before and after reducing the generating power, if the voltage fluctuation is within the preset voltage fluctuation range, judging that the power battery is online, if the voltage fluctuation exceeds the preset voltage fluctuation range. , judge that the power battery is offline.

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 neither charging nor discharging. In the case that the power battery is not disconnected, if the power generation is suddenly reduced, the power battery will actively compensate for this part of the reduced power to maintain the voltage of the high-voltage bus. In the busbar fluctuation detection, the power generation is reduced, and the voltage fluctuation of the high-voltage busbar before and after the reduction of the generated power is detected. If the voltage fluctuation is within the preset voltage fluctuation range, it means that the power battery provides compensation power, and the power battery is judged to be online. If the voltage fluctuation exceeds the preset voltage fluctuation range, it means that the power battery does not provide compensation power, and the power battery is judged to be offline.

The preset voltage fluctuation range may be determined according to engineering experience values or experimental simulation values, and may also be determined in combination with specific application scenarios.

For the high-voltage bus, the voltage itself may have normal fluctuations, corresponding to a normal fluctuation range. The normal fluctuation range is usually 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 to 210V.

In a specific example, the corresponding normal fluctuation range may be determined according to the voltage of the high-voltage bus before reducing the power generation, and the normal fluctuation range may be set as the preset fluctuation range.

110. Determine whether the result of the bus fluctuation detection indicates that the power battery is online, and if the result of the bus fluctuation detection indicates that the power battery is online, return to step 102. If the result of the bus bar fluctuation detection is that the power battery is offline, step 112 is executed.

112. In the case that the power battery is offline as a result of the busbar fluctuation detection, perform a power battery alarm.

In a specific example, the warning can be realized by lighting or flashing the warning indicator light corresponding to the power battery. In a specific example, the alarm can be implemented through voice broadcast.

In a specific example, in the case that the power battery is offline as a result of the busbar fluctuation detection, the hybrid electric vehicle is switched to the limp mode. In limp mode, the hybrid is able to perform basic functions, driving at a minimum performance level, helping the driver to get to a safe place safely.

The solution for detecting the online state of the battery of the hybrid electric vehicle provided by the embodiment of the present invention can accurately detect the online state of the power battery under the power generation condition of the hybrid electric vehicle, thereby improving the driving safety.

In the solution for detecting the online state of the battery of the hybrid vehicle provided by the embodiment of the present invention, only when it is preliminarily determined that the power battery may be suspected to be offline according to the charging and discharging current of the power battery, the busbar fluctuation detection is used to accurately determine whether the power battery is offline. , the overall calculation amount is relatively small, and the detection process is more secure.

Referring to Fig. 3, the busbar fluctuation detection provided by an embodiment of the present invention includes the following steps:

302. Reduce the power generation by a preset reduction value, and detect and detect the voltage fluctuation of the high-voltage bus before and after the reduction of the power generation this time.

304. Determine whether the voltage fluctuation of the high-voltage bus before and after the reduction of the generating power this time exceeds a preset voltage fluctuation range. If it exceeds, the power battery is offline. If not, step 306 is executed.

306. Determine whether the generated power is reduced to or below the target power. If the generated power is not reduced to the target power or below, return to step 302 . If the generated power is reduced to the target power or lower, the busbar fluctuation detection is terminated, and the power battery is judged to be online.

In this embodiment, the target power may be set according to the original power generation, and the reduction value may be set according to the original power generation and the target power. For example, the original power generation is 80 kW, the target power is set to 79.5 kW, and the reduction value is set to 100 watts.

In this embodiment, by setting the target power and the reduction value, a gradual trial method is used to determine whether the power battery is online. This detection method is relatively safer, and can prevent the power battery from being offline due to excessive reduction of the generated power at one time. The situation where the compensation power has an adverse effect occurs.

<Example 3>

Referring to FIG. 4 , a method for detecting a battery state of a hybrid electric vehicle provided by an embodiment of the present invention includes the following steps:

202. Determine whether the hybrid vehicle needs to exit the power generation condition.

In a specific example, the information on whether the hybrid vehicle is to exit the power generation condition can be obtained from the controller of the hybrid powertrain.

204. If the hybrid vehicle is to exit the power generation condition, perform busbar fluctuation detection.

In this embodiment, for the specific process of busbar fluctuation detection, reference may be made to the relevant content of the foregoing embodiment, and the description will not be repeated here.

206. Determine whether the result of the busbar fluctuation detection is that the power battery is online. If the detection result of the busbar fluctuation detection is that the power battery is online, step 208 is executed. If the detection result of the bus bar fluctuation detection is that the power battery is online, step 210 is executed.

208. In the case that the result of the busbar fluctuation detection is that the power battery is online, control the hybrid vehicle to exit the power generation condition normally.

210. When the result of the bus bar fluctuation detection is that the power battery is offline, perform a power battery alarm.

In this embodiment, reference may be made to the relevant content of the foregoing embodiment for the manner of performing the power battery alarm, and the description will not be repeated here.

In a specific example, in the case that the power battery is offline as a result of the busbar fluctuation detection, the hybrid electric vehicle is switched to the limp mode. In limp mode, the hybrid is able to perform basic functions, driving at a minimum performance level, helping the driver to get to a safe place safely.

The solution for detecting the online state of the battery of the hybrid electric vehicle provided by the embodiment of the present invention can detect the online state of the power battery before the hybrid electric vehicle exits the power generation condition, and when it is determined that the power battery is online, control the hybrid electric vehicle. The power vehicle normally exits the power generation condition, which improves the driving safety.

<Detection device for battery state of hybrid vehicle>

<Example 1>

An embodiment of the present invention provides an apparatus for detecting a battery state of a hybrid electric vehicle, including a busbar fluctuation detection module.

The busbar fluctuation detection module is used to detect the busbar fluctuation when the hybrid electric vehicle is in the power generation condition; the busbar fluctuation detection includes: reducing the generating power and detecting the voltage fluctuation of the high-voltage bus before and after reducing the generating power. Set the voltage fluctuation range to determine that the power battery is online. If the voltage fluctuation exceeds the preset voltage fluctuation range, determine that the power battery is offline.

In a specific example, the detection device further includes a fault processing module.

The fault processing module is used to give an alarm and/or control the hybrid electric vehicle to enter the limp mode when the detection result of the busbar fluctuation detection is that the power battery is offline.

In a specific example, the busbar 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, the first detection step includes: reducing the generated power by a preset reduction value, and detecting and detecting whether the voltage fluctuation of the high-voltage bus before and after the reduction of the generated power exceeds the preset value. Set the voltage fluctuation range.

The second sub-module is used to judge that the power battery is offline if the detection result of the first detection step is yes; if the detection result of the first detection step is NO and the generated power is not reduced to the preset target power, the first sub-module is called again A first detection step is performed; if the detection result of the first detection step is no and the power generated is reduced to a preset target power, it is determined that the power battery is online.

<Example 2>

Referring to FIG. 5 , an apparatus 100 for detecting a battery state of a hybrid electric vehicle provided by 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 electric vehicle is in the power generation condition; when the absolute value of the charging and discharging current of the power battery is greater than the preset current threshold, it is judged that the power battery is online; When the absolute value of the charging and discharging current of the power battery is less than or equal to the preset current threshold, the busbar fluctuation detection module 20 is called to detect the busbar fluctuation.

The busbar fluctuation detection module 20 is used to detect the busbar fluctuation; the busbar fluctuation detection includes: reducing the generating power and detecting the voltage fluctuation of the high-voltage bus before and after reducing the generating power, and determining the power battery if the voltage fluctuation is within the preset voltage fluctuation range Online, if the voltage fluctuation exceeds the preset voltage fluctuation range, it is judged that the power battery is offline.

In a specific example, the detection apparatus 100 further includes a fault handling module.

The fault processing module is used to give an alarm and/or control the hybrid electric vehicle to enter the limp mode when the detection result of the busbar fluctuation detection is that the power battery is offline.

In a specific example, the busbar fluctuation detection module 20 includes a first sub-module and a second sub-module.

The first sub-module is configured to perform a first detection step, the first detection step includes: reducing the generated power by a preset reduction value, and detecting and detecting whether the voltage fluctuation of the high-voltage bus before and after the reduction of the generated power exceeds the preset value. Set the voltage fluctuation range.

The second sub-module is used to judge that the power battery is offline if the detection result of the first detection step is yes; if the detection result of the first detection step is NO and the generated power is not reduced to the preset target power, the first sub-module is called again A first detection step is performed; if the detection result of the first detection step is no and the power generated is reduced to a preset target power, it is determined that the power battery is online.

<Example 3>

Referring to FIG. 6 , an apparatus 200 for detecting a battery state of a hybrid electric vehicle provided by 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 electric vehicle is in the power generation condition; when the absolute value of the charging and discharging current of the power battery is greater than the preset current threshold, it is judged that the power battery is online; When the absolute value of the charging and discharging current of the power battery is less than or equal to the preset current threshold, the busbar fluctuation detection module 20 is called to detect the busbar fluctuation.

The busbar fluctuation detection module 20 is used to detect the busbar fluctuation; the busbar fluctuation detection includes: reducing the generating power and detecting the voltage fluctuation of the high-voltage bus before and after reducing the generating power, and determining the power if the voltage fluctuation is within the preset voltage fluctuation range The battery is online. If the voltage fluctuation exceeds the preset voltage fluctuation range, it is judged that the power battery is offline.

The working condition management module 30 is used to call the busbar fluctuation detection module 20 to detect the busbar fluctuation when the hybrid electric vehicle is about to exit the power generation condition; The result is that the power battery is online, and the hybrid vehicle is controlled to exit the power generation condition.

In a specific example, the detection apparatus 100 further includes a fault handling module.

The fault processing module is used to give an alarm and/or control the hybrid electric vehicle to enter the limp mode when the detection result of the busbar fluctuation detection is that the power battery is offline.

In a specific example, the busbar fluctuation detection module 20 includes a first sub-module and a second sub-module.

The first sub-module is configured to perform a first detection step, the first detection step includes: reducing the generated power by a preset reduction value, and detecting and detecting whether the voltage fluctuation of the high-voltage bus before and after the reduction of the generated power exceeds the preset value. Set the voltage fluctuation range.

The second sub-module is used to judge that the power battery is offline if the detection result of the first detection step is yes; if the detection result of the first detection step is NO and the generated power is not reduced to the preset target power, the first sub-module is called again A first detection step is performed; if the detection result of the first detection step is no and the power generated is reduced to a preset target power, it is determined that the power battery is online.

<Example 4>

An apparatus for detecting a battery state of a hybrid electric vehicle provided by an embodiment of the present invention includes a memory and a processor; the memory stores instructions, and when the instructions are executed by the processor, the method disclosed in any of the foregoing embodiments is implemented.

<Hybrid powertrain control device>

A hybrid powertrain control device provided by an embodiment of the present invention includes a memory and a processor; the memory stores instructions, and when the instructions are executed by the processor, the method disclosed in any of the foregoing embodiments is implemented.

<Hybrid>

Referring to FIG. 7 , a hybrid vehicle provided by an embodiment of the present invention includes the device for detecting the battery state of the hybrid vehicle disclosed in any of the foregoing embodiments.

Referring to FIG. 8 , a hybrid vehicle provided by an embodiment of the present invention includes the hybrid powertrain control device disclosed in any of the foregoing embodiments.

<Computer-readable storage medium>

A computer-readable storage medium provided by an embodiment of the present invention stores instructions thereon, and when the instructions are executed by a processor, implements the method disclosed in any of the foregoing embodiments.

Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, vehicle, and medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and reference may be made to some descriptions of the method embodiments for related parts.

The foregoing describes specific embodiments of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that in the embodiments and still achieve desirable results. Additionally, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

Embodiments of the present specification 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 loaded thereon for causing a processor to implement various aspects of the embodiments of the present specification.

A 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 electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (non-exhaustive list) of computer readable storage media include: portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM) or flash memory), static random access memory (SRAM), portable compact disk read only memory (CD-ROM), digital versatile disk (DVD), memory sticks, floppy disks, mechanically encoded devices, such as those on which computer instructions are stored Punched cards or raised structures in grooves, and any suitable combination of the above. Computer-readable storage media, as used herein, are not to be construed as transient signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (eg, light pulses through fiber optic cables), or through electrical wires transmitted electrical signals.

The computer readable program computer instructions described herein may be downloaded to various computing/processing devices from a computer readable storage medium, or to an external computer or external storage device over 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. A network adapter card or network interface in each computing/processing device receives computer readable program computer instructions from a network and forwards the computer readable program computer instructions for storage in computer readable storage in the respective computing/processing device in the medium.

The computer program computer instructions for carrying out the operations of the embodiments of this specification may be assembly computer instructions, computer instruction set architecture (ISA) computer instructions, machine computer instructions, machine dependent 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 object-oriented programming languages - such as Smalltalk, C++, etc., and conventional procedural programming languages - such as "C" or the like programming language. 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 execute on. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (eg, using an Internet service provider through the Internet connect). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), is personalized by utilizing state information of computer readable program computer instructions, the electronic circuit Computer readable program computer instructions can be executed to implement various aspects of the embodiments of this specification.

Aspects of the 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 present 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 the processor of a general purpose computer, special purpose computer or other programmable data processing device to produce a machine in which the computer instructions are executed by the processor of the computer or other programmable data processing device When executed, results in means for implementing the functions/acts specified in one or more blocks of the flowchart and/or block diagrams. These computer readable program computer instructions can also be stored in a computer readable storage medium, these computer instructions cause a computer, programmable data processing apparatus and/or other equipment to operate in a specific manner, so that the computer readable by the stored computer instructions The medium then includes an article of manufacture comprising computer instructions that implement various aspects of the functions/acts specified in one or more blocks of the flowchart and/or block diagrams.

The computer readable program computer instructions can also be loaded on a computer, other programmable data processing apparatus, or other equipment to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other equipment to produce a computer-implemented Processes such that computer instructions executing on a computer, other programmable data processing apparatus, or other device perform the functions/acts specified in one or more blocks of the flowcharts and/or block diagrams.

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 specification. 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 functions for implementing the specified logical function(s) Executable computer instructions. In some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two blocks 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 is also noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented in dedicated hardware-based systems that perform the specified functions or actions , or can be implemented in a combination of dedicated hardware and computer instructions. It is well known to those skilled in the art that the hardware is implemented, the software is implemented

It is equivalent to realize by the way of software and hardware combination.

Various embodiments of this specification have been described above, and the foregoing descriptions are exemplary, not exhaustive, and not limiting of the disclosed embodiments. Numerous modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope of the described embodiments. The terminology used herein was chosen to best explain the principles of the embodiments, the practical application or technical improvement over the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (12)

1. A method for detecting the state of a battery of a hybrid electric vehicle, comprising the steps of: When the hybrid electric vehicle is in the power generation condition, the charging and discharging current of the power battery is detected; when the absolute value of the charging and discharging current of the power battery is greater than the preset current threshold, it is judged that the power battery is online; When the absolute value of the charging and discharging current of the battery is less than or equal to the preset current threshold, the busbar fluctuation detection is performed; The busbar fluctuation detection includes: reducing the power generation and detecting the voltage fluctuation of the high-voltage bus before and after the reduction of the generated power. If the voltage fluctuation is within the preset voltage fluctuation range, it is judged that the power battery is online, and if the voltage fluctuation exceeds the preset voltage fluctuation. Set the voltage fluctuation range to judge that the power battery is offline; Wherein, before the busbar fluctuation detection is performed, the corresponding normal fluctuation range is determined according to the voltage of the high-voltage busbar, and the normal fluctuation range is set as a preset fluctuation range. 2. The method of claim 1, further comprising: When the hybrid vehicle is about to exit the power generation condition, the busbar fluctuation detection is performed; If the detection result of the busbar fluctuation detection performed when the hybrid electric vehicle is about to exit the power generation condition is that the power battery is online, the hybrid electric vehicle is controlled to exit the power generation condition. 3. The method of claim 1, further comprising: When the detection result of the busbar fluctuation detection is that the power battery is offline, an alarm is performed and/or the hybrid electric vehicle is controlled to enter a limp mode. 4. The method according to any one of claims 1-3, the detection of busbar fluctuations, comprising: Performing a first detection step, the first detection step includes: reducing the power generation by a preset reduction value, and detecting whether the voltage fluctuation of the high-voltage bus before and after the reduction of the generated power this time exceeds a preset voltage fluctuation range; If the detection result of the first detection step is yes, it is judged that the power battery is offline; If the detection result of the first detection step is no and the generated power is not reduced to the preset target power, perform the first detection step again; If the detection result of the first detection step is negative and the generated power is reduced to a preset target power, it is determined that the power battery is online. 5. A detection device for battery state of a hybrid electric vehicle, comprising a current detection module and a busbar fluctuation detection module: The current detection module is used to detect the charging and discharging current of the power battery when the hybrid electric vehicle is in a power generation condition; when the absolute value of the charging and discharging current of the power battery is greater than a preset current threshold, determine the The power battery is online; when the absolute value of the charging and discharging current of the power battery is less than or equal to the preset current threshold, the busbar fluctuation detection module is called to detect the busbar fluctuation; The busbar fluctuation detection module is used for busbar fluctuation detection; the busbar fluctuation detection includes: reducing the generating power and detecting the voltage fluctuation of the high-voltage bus before and after reducing the generating power, if the voltage fluctuation is within a preset voltage fluctuation range , determine that the power battery is online, and if the voltage fluctuation exceeds the preset voltage fluctuation range, determine that the power battery is offline; The busbar fluctuation detection module is further configured to determine a corresponding normal fluctuation range according to the voltage of the high-voltage bus before performing the busbar fluctuation detection, and set the normal fluctuation range to a preset fluctuation range. 6. The detection device according to claim 5, further comprising a working condition management module; The operating condition management module is used to call the busbar fluctuation detection module to perform busbar fluctuation detection when the hybrid electric vehicle is about to exit the power generation condition; The detection result of the fluctuation detection is that the power battery is online, and the hybrid electric vehicle is controlled to exit the power generation condition. 7. The detection device according to claim 5, further comprising a fault handling module; The fault handling module is configured to give an alarm and/or control the hybrid electric vehicle to enter a limp mode when the detection result of the busbar fluctuation detection is that the power battery is offline. 8. The detection device according to any one of claims 5-7, wherein the busbar fluctuation detection module comprises a first submodule and a second submodule; The first sub-module is used to perform a first detection step, and the first detection step includes: reducing the power generation by a preset reduction value, and detecting whether the voltage fluctuation of the high-voltage bus before and after the reduction of the power generation exceeds the limit. the preset voltage fluctuation range; The second sub-module is used to judge that the power battery is offline if the detection result of the first detection step is yes; if the detection result of the first detection step is NO and the generated power is not reduced to the preset target power, call the power battery again. The first sub-module executes the first detection step; if the detection result of the first detection step is negative and the generated power is reduced to a preset target power, it is determined that the power battery is online. 9 . An apparatus for detecting a battery state of a hybrid electric vehicle, comprising a memory and a processor; wherein the memory stores instructions, and when the instructions are executed by the processor, the method according to any one of claims 1 to 4 is implemented. 10 . 10. 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 one of claims 1-4. 11. A hybrid vehicle, comprising the detection device of any one of claims 5-9 or the hybrid powertrain control device of claim 10. 12. A computer-readable storage medium having stored thereon instructions that, when executed by a processor, implement the method of any one of claims 1-4.

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