CN112838295A - Battery heating system detection method and device, vehicle and storage medium - Google Patents
Battery heating system detection method and device, vehicle and storage medium Download PDFInfo
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- CN112838295A CN112838295A CN202011631481.8A CN202011631481A CN112838295A CN 112838295 A CN112838295 A CN 112838295A CN 202011631481 A CN202011631481 A CN 202011631481A CN 112838295 A CN112838295 A CN 112838295A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application provides a battery heating system detection method, a battery heating system detection device, a vehicle and a storage medium. The method comprises the following steps: at a first moment during the heating state of the battery pack, obtaining a first temperature value at a heating medium inlet of a battery heating system; obtaining a second temperature value at a heating medium inlet of the battery heating system at a second moment separated from the first moment by a preset time length; and determining whether the battery heating system fails according to the size relationship between the first temperature value and the first preset threshold value and the size relationship between the second temperature value and the first preset threshold value. According to the method, whether the battery heating system fails or not is determined by monitoring the temperature value of the heating medium of the battery heating system in real time, and related workers can replace the failed battery heating system in time, so that the battery heating system can heat the battery pack smoothly in a low-temperature environment.
Description
Technical Field
The present disclosure relates to the field of vehicle technologies, and in particular, to a method and an apparatus for detecting a battery heating system, a vehicle, and a storage medium.
Background
The power lithium ion battery is used as a mobile energy carrier, is a core component of new energy equipment, and continuously plays a significant role in changing the intelligent life style of people. But is limited by the characteristics and technical development of the lithium ion battery, the performance of the lithium ion battery in a low-temperature environment cannot completely meet the conventional requirements at present, and the safety problem is even caused by abnormal use at low temperature. For example, when a lithium ion battery of a new energy automobile is used in a low-temperature environment, in order to avoid abnormality during use, a heating medium is generally heated by a battery heating system, and then the battery is heated to a suitable temperature by the heating medium to start use. In the related art, the heating system of the battery cannot be detected, and thus the normal use of the battery in a low-temperature environment cannot be guaranteed.
Disclosure of Invention
In view of the above problems, the present application provides a method and an apparatus for detecting a battery heating system, a vehicle and a storage medium, which can determine whether the battery heating system fails by monitoring a temperature value of a heating medium of the battery heating system in real time, so that a relevant worker can replace the failed battery heating system in time, thereby ensuring that the battery heating system can heat a battery pack smoothly in a low temperature environment.
The application provides a battery heating system detection method, which comprises the following steps:
at a first moment during the heating state of the battery pack, obtaining a first temperature value at a heating medium inlet of the battery heating system;
obtaining a second temperature value at a heating medium inlet of the battery heating system at a second moment separated from the first moment by a preset time length;
and determining whether the battery heating system fails or not according to the magnitude relation between the first temperature value and a first preset threshold value and the magnitude relation between the second temperature value and the first preset threshold value.
Optionally, the method further comprises:
under the condition that the battery pack is not in a heating state, obtaining a third temperature value of a battery monomer with the lowest temperature in the battery pack;
detecting whether a battery management system of the battery pack is in a fault state or not under the condition that the third temperature value is in a preset interval;
under the condition that the battery management system is not in a fault state, detecting whether the battery pack sends a heating request to the battery management system or not, and whether the battery pack is in a heating state after sending the heating request to the battery management system or not;
and determining the time period when the battery pack is in the heating state and the battery pack has sent the heating request to the battery management system, as the time period when the battery pack is in the heating state.
Optionally, the method further comprises:
detecting the ambient temperature of the battery pack;
under the condition that the battery pack is not in a heating state, obtaining a third temperature value of a battery cell with the lowest temperature in the battery pack, wherein the third temperature value comprises the following steps:
and under the condition that the environmental temperature is not greater than a second preset threshold value and the battery pack is not in a heating state, obtaining a third temperature value of the battery monomer with the lowest temperature in the battery pack.
Optionally, the method further comprises:
obtaining a charge parameter of the battery pack during the heating state of the battery pack;
obtaining a first temperature value at a heating medium inlet of the battery heating system at a first time during a heating state of a battery pack, comprising:
under the condition that the charge parameter is larger than a third preset threshold value, obtaining a first temperature value at a heating medium inlet of the battery heating system at a first moment during the heating state of the battery pack;
the method further comprises the following steps:
and under the condition that the charge parameter is not larger than the third preset threshold, controlling the battery heating system to stop heating the battery pack by using the electric energy of the battery pack.
Optionally, the method further comprises:
monitoring the working state of each element of the battery heating system to obtain a monitoring result;
determining whether the battery heating system fails according to the magnitude relation between the first temperature value and the second temperature value and a first preset threshold value respectively, including:
determining that the battery heating system is invalid when the second temperature value is not greater than the first preset threshold value or the monitoring result indicates that the battery heating system is in a failure state;
determining that the battery heating system is not failed under the condition that the first temperature value and the second temperature value are respectively greater than the first preset threshold value and the monitoring result shows that the battery heating system is in a normal state;
the method further comprises the following steps:
and outputting early warning information under the condition that the battery heating system is determined to be invalid.
The application also provides a battery heating system detection device, includes:
the battery heating system comprises a first obtaining module, a second obtaining module and a control module, wherein the first obtaining module is used for obtaining a first temperature value at a heating medium inlet of the battery heating system at a first moment during a heating state of a battery pack;
the second obtaining module is used for obtaining a second temperature value at a heating medium inlet of the battery heating system at a second moment which is separated from the first moment by a preset time length;
and the first determining module is used for determining whether the battery heating system fails or not according to the magnitude relation between the first temperature value and a first preset threshold value and the magnitude relation between the second temperature value and the first preset threshold value.
Optionally, the apparatus further comprises:
the third obtaining module is used for obtaining a third temperature value of the battery monomer with the lowest temperature in the battery pack under the condition that the battery pack is not in a heating state;
the first detection module is used for detecting whether a battery management system of the battery pack is in a fault state or not under the condition that the third temperature value is in a preset interval;
the second detection module is used for detecting whether the battery pack sends a heating request to the battery management system or not and whether the battery pack is in a heating state after sending the heating request to the battery management system or not under the condition that the battery management system is not in a fault state;
and the second determination module is used for determining the time period when the battery pack is in the heating state and the battery pack has sent the heating request to the battery management system, and determining that the battery pack is in the heating state.
Optionally, the apparatus further comprises:
the third detection module is used for detecting the ambient temperature of the battery pack;
the third obtaining module includes:
and the first obtaining submodule is used for obtaining a third temperature value of the battery monomer with the lowest temperature in the battery pack under the condition that the environment temperature is not greater than a second preset threshold and the battery pack is not in a heating state.
Optionally, the apparatus further comprises:
the fourth obtaining module is used for obtaining the charge parameters of the battery pack when the battery pack is in a heating state;
the first obtaining module includes:
the second obtaining submodule is used for obtaining a first temperature value at a heating medium inlet of the battery heating system at a first moment during the heating state of the battery pack under the condition that the charge parameter is larger than a third preset threshold;
the device further comprises:
and the control module is used for controlling the battery heating system to stop heating the battery pack by using the electric energy of the battery pack under the condition that the charge parameter is not larger than the third preset threshold value.
Optionally, the apparatus further comprises:
the fifth obtaining module is used for monitoring the working state of each element of the battery heating system to obtain a monitoring result;
the first determining module includes:
the first determining submodule is used for determining that the battery heating system is failed under the condition that the second temperature value is not larger than the first preset threshold value or the monitoring result shows that the battery heating system is in a failure state;
the second determining submodule is used for determining that the battery heating system does not fail under the condition that the first temperature value and the second temperature value are respectively greater than the first preset threshold value and the monitoring result shows that the battery heating system is in a normal state;
the device further comprises:
and the output module is used for outputting early warning information under the condition that the battery heating system is determined to be invalid.
The present application further provides a vehicle, comprising:
one or more processors; and
one or more machine readable media having instructions stored thereon, which when executed by the one or more processors, cause the vehicle to perform one or more method steps as described in embodiments of the application.
The present application further provides a computer-readable storage medium having stored thereon instructions, which when executed by one or more processors, cause the processors to perform one or more of the method steps as described in embodiments of the present application.
The application has the following advantages:
according to the battery heating system detection method, the first temperature value at the heating medium inlet of the battery heating system is obtained at the first moment when the battery pack is in the heating state, and the second temperature value at the heating medium inlet of the battery heating system is obtained at the second moment which is separated from the first moment by the preset time length. And then, determining whether the battery heating system fails according to the magnitude relation between the first temperature value and the first preset threshold value and the magnitude relation between the second temperature value and the first preset threshold value. According to the method, whether the battery heating system fails or not is determined by monitoring the temperature value of the heating medium of the battery heating system in real time, and related workers can replace the failed battery heating system in time, so that the battery heating system can heat the battery pack smoothly in a low-temperature environment, and the normal use of the battery pack is further ensured.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the present application will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic diagram illustrating an implementation scenario according to an embodiment of the present application;
FIG. 2 is a flow chart illustrating a method for testing a battery heating system according to an embodiment of the present application;
FIG. 3 is a process diagram illustrating a method for testing a battery heating system according to an embodiment of the present application;
fig. 4 is a block diagram of a detection device of a battery heating system according to an embodiment of the present disclosure.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic diagram of an implementation scenario according to an embodiment of the present application. In fig. 1, a vehicle is internally mounted with a battery system including a battery pack and a battery heating system containing a heating medium for heating the battery pack. When a vehicle runs in a low-temperature environment, in order to avoid safety problems caused by low temperature of the battery pack, the battery pack is generally started to be used after a heating medium is heated by a battery heating system and then the battery pack is heated to a proper temperature by the heating medium. For the sake of convenience of describing the battery heating system detection method in detail, the battery heating system of the present application is described in detail herein by taking the battery heating system in the vehicle interior as an example. Of course, the battery heating system may be a battery heating system in any other device, and the embodiment is not particularly limited thereto.
Fig. 2 is a flowchart illustrating a battery heating system detection method according to an embodiment of the present application. Referring to fig. 2, the battery heating system detection method of the present application may include the steps of:
step S21: at a first moment during a battery pack being in a heated state, a first temperature value at a heating medium inlet of the battery heating system is obtained.
In this embodiment, the execution subject may be a detection System inside the vehicle, and the detection System may be a BMS (Battery Management System) System inside the vehicle or a cloud control System independent from the vehicle, and the embodiment does not specifically limit the type of the execution subject.
In step S21, the detection system may collect the temperature at the heating medium inlet of the battery heating system in a preset period. Specifically, the detection system first obtains a first temperature value at the heating medium inlet at a first time during the battery pack being in a heated state.
Step S22: and obtaining a second temperature value at a heating medium inlet of the battery heating system at a second moment which is separated from the first moment by a preset time length.
In the present embodiment, the time period between the first time and the second time is one cycle. The detection system obtains a second temperature value at the inlet of the heating medium at a second moment during the heating state of the battery pack after obtaining the first temperature value.
Step S23: and determining whether the battery heating system fails or not according to the magnitude relation between the first temperature value and a first preset threshold value and the magnitude relation between the second temperature value and the first preset threshold value.
In this embodiment, the collected temperature value corresponds to a first preset threshold, where the first preset threshold is an empirical value for determining whether the battery heating system fails, and the first preset threshold may be specifically set according to an actual requirement, which is not specifically limited in this embodiment. Illustratively, when the first preset threshold is X, the first temperature value is compared with X to obtain a comparison result, the second temperature value is compared with X to obtain a comparison result, and finally, whether the battery heating system fails or not is determined according to the two sets of comparison results.
For example, assuming that the temperature collection period at the heating medium inlet set in the detection system is 300s, and the first time is t0, the detection system may use the temperature at the heating medium inlet collected at the time (t0+300s) as the first temperature value, use the temperature at the heating medium inlet collected at the time (t0+600s) as the second temperature value, and then determine whether the battery heating system is failed according to the magnitude relationship between each of the first temperature value and the second temperature value and the first preset threshold.
By way of further example, the detection system may further collect the temperature at the heating medium inlet at the time (t0+900s), use the temperature at the heating medium inlet collected at the time (t0+600s) as a first temperature value, use the temperature at the heating medium inlet collected at the time (t0+900s) as a second temperature value, and then determine whether the battery heating system is failed according to the magnitude relationship between each of the first temperature value and the second temperature value and the first preset threshold value.
By the battery heating system detection method of the embodiment, a first temperature value at a heating medium inlet of the battery heating system is obtained at a first time during the heating state of the battery pack, and a second temperature value at the heating medium inlet of the battery heating system is obtained at a second time separated from the first time by a preset time length. And then, determining whether the battery heating system fails or not according to the magnitude relation between the first temperature value and the first preset threshold value and the magnitude relation between the second temperature value and the first preset threshold value. According to the method, whether the battery heating system fails or not is determined by monitoring the temperature value of the heating medium of the battery heating system in real time, and related workers can replace the failed battery heating system in time, so that the battery heating system can heat the battery pack smoothly in a low-temperature environment, and the normal use of the battery pack is further ensured.
With reference to the foregoing example, in an implementation manner, determining whether the battery heating system fails according to a magnitude relationship between the first temperature value and the second temperature value and a first preset threshold, may include:
determining that the battery heating system is invalid when the second temperature value is not greater than the first preset threshold value;
determining that the battery heating system is not failed when the first temperature value and the second temperature value are respectively greater than the first preset threshold value;
the method further comprises the following steps:
and outputting early warning information under the condition that the battery heating system is determined to be invalid.
In this embodiment, when the battery heating system fails, the battery heating system needs to be replaced, so that the battery heating system can smoothly heat the battery pack.
In this embodiment, when the temperature value of the heating medium of the battery heating system collected at any moment is not greater than a first preset threshold value, it indicates that the battery heating system cannot be smoothly heated, and it can be determined that the battery heating system is out of service, at this moment, the detection system can output early warning prompt information to remind relevant workers of timely replacing the failed battery heating system, so that the battery heating system can be smoothly heated for the battery pack in a low-temperature environment, and the normal use of the battery pack can be further ensured. And when the temperature values of the heating medium collected twice in succession are greater than a first preset threshold value, determining that the battery heating system is not failed.
In combination with the above embodiments, in an implementation manner, before obtaining the first temperature value, the detection system may further detect multiple states of the battery system, so as to improve accuracy of a detection result. Specifically, the battery heating system detection method of the present application may further include:
under the condition that the battery pack is not in a heating state, obtaining a third temperature value of a battery monomer with the lowest temperature in the battery pack;
detecting whether a battery management system of the battery pack is in a fault state or not under the condition that the third temperature value is in a preset interval;
under the condition that the battery management system is not in a fault state, detecting whether the battery pack sends a heating request to the battery management system or not, and whether the battery pack is in a heating state after sending the heating request to the battery management system or not;
and determining the time period when the battery pack is in the heating state and the battery pack has sent the heating request to the battery management system, as the time period when the battery pack is in the heating state.
In this embodiment, a plurality of battery cells are arranged in the battery pack, one battery cell may be understood as a single battery cell, each battery cell corresponds to one temperature when heating, and the lowest cell temperature refers to a temperature corresponding to a battery cell with a lowest temperature value in all the battery cells. The third temperature value is the lowest monomer temperature of the battery pack, and the preset interval is the normal use interval of the battery temperature.
When the battery pack is not in a heating state, the detection system can firstly obtain the lowest cell temperature of the battery pack and judge whether the lowest cell temperature is in a normal use interval of the battery. If the battery pack is in the interval, stopping the detection program, otherwise, continuously judging whether the battery management system of the battery pack is in a fault state. If the battery pack is in a fault state, stopping the detection program, otherwise, continuously detecting whether the battery pack sends a heating request to the battery management system and whether the battery pack is in a heating state after sending the heating request to the battery management system, if the battery pack already sends the heating request to the battery management system and the battery pack is in the heating state after sending the heating request to the battery management system, starting the detection program, and referring the period of the battery pack after the detection program is started to be the period of the heating state, otherwise, stopping the detection program.
In this embodiment, the detection system judges the lowest cell temperature of the battery pack, the fault state of the battery management system and the battery heating request state in sequence, so that the problem of heating medium failure caused by the performance reasons of the battery heating system is solved, and the accuracy of the detection result is improved.
With reference to the above embodiment, in an implementation manner, in addition to determining the lowest cell temperature of the battery pack, the fault state of the battery management system, and the battery heating request state, after the detection procedure is started, the state of charge of the battery pack may also be determined. Specifically, the battery heating system detection method of the present application may further include:
obtaining a charge parameter of the battery pack during the heating state of the battery pack;
accordingly, obtaining a first temperature value at a heating medium inlet of the battery heating system at a first time during a heating state of a battery pack comprises:
under the condition that the charge parameter is larger than a third preset threshold value, obtaining a first temperature value at a heating medium inlet of the battery heating system at a first moment during the heating state of the battery pack;
the battery heating system detection method of the present application may further include:
and under the condition that the charge parameter is not larger than the third preset threshold, controlling the battery heating system to stop heating the battery pack by using the electric energy of the battery pack.
In this embodiment, the charge amount of the battery pack can be seen through the charge parameters of the battery pack. Since the battery heating system uses the electric quantity of a part of the battery pack in the process of heating the heating medium, when the electric quantity charged in the battery pack is too low, the battery heating system may not heat the heating medium normally even if the heating medium is not in failure. Therefore, the first temperature value and the second temperature value need to be obtained to detect the battery heating system when the charge parameter of the battery pack is greater than the preset charge parameter (i.e., the third preset threshold), that is, the charge amount of the battery pack is sufficient.
When the charge parameter is not greater than the preset charge parameter, the detection system can output a prompt of insufficient electric quantity to inquire whether the user continues to detect the effectiveness of the heating medium, and if the user selects to stop the detection program, the detection system controls the battery heating system to stop heating the heating medium by using the electric energy of the battery pack and does not detect the effectiveness of the heating medium any more. If the user chooses to continue with the detection procedure, the detection system continues to detect the effectiveness of the heating medium.
In this embodiment, the validity of the heating medium of the battery heating system is detected under the condition that the charged amount of the battery pack is sufficient, and the accuracy of the detection result can be effectively improved.
With reference to the above embodiment, in an implementation manner, the battery heating system detection method of the present application may further include the following steps:
detecting the ambient temperature of the battery pack;
under the condition that the battery pack is not in a heating state, obtaining a third temperature value of a battery cell with the lowest temperature in the battery pack, wherein the third temperature value comprises the following steps:
and under the condition that the environmental temperature is not greater than a second preset threshold value and the battery pack is not in a heating state, obtaining a third temperature value of the battery monomer with the lowest temperature in the battery pack.
In this embodiment, the detection system automatically starts the detection procedure in a low temperature environment. The detection system determines whether the battery pack is in the low-temperature environment currently by adopting the following mode, obtains the environment temperature of the battery pack, and indicates that the battery pack is in the low-temperature environment currently if the environment temperature is not greater than the preset environment temperature (namely, a second preset threshold).
In specific implementation, the upper limit value of the preset interval may be used as the preset ambient temperature. For example, when the preset interval is-10 to 6 degrees, 6 degrees may be used as the preset ambient temperature.
After determining that the battery pack is in the low-temperature environment, the detection system obtains a third temperature value of the battery cell with the lowest temperature in the battery pack, and performs subsequent state determination steps.
In this embodiment, the detection program may also run continuously, and at this time, a preset ambient temperature does not need to be set, and the detection system may directly obtain the third temperature value of the battery cell with the lowest temperature in the battery pack to determine whether the third temperature value falls within the normal use interval of the battery temperature, and perform subsequent state determination.
With reference to the foregoing embodiments, in one implementation manner, the battery heating system detection method of the present application may be used in combination with other battery heating system detection methods to improve the accuracy of the performance detection result. Specifically, the battery heating system detection method of the present application may further include the steps of:
monitoring the working state of each element of the battery heating system to obtain a monitoring result;
correspondingly, determining whether the battery heating system fails according to the magnitude relationship between the first temperature value and the second temperature value and a first preset threshold value may include:
determining that the battery heating system is invalid when the second temperature value is not greater than the first preset threshold value or the monitoring result indicates that the battery heating system is in a failure state;
and determining that the battery heating system is not failed under the condition that the first temperature value and the second temperature value are respectively greater than the first preset threshold value and the monitoring result shows that the battery heating system is in a normal state.
On this basis, the battery heating system detection method of the present application may further include:
and outputting early warning information under the condition that the battery heating system is determined to be invalid.
In this embodiment, the operating states of the elements of the battery heating system may also be directly monitored to obtain the monitoring results of the elements. And then, comprehensively considering the relationship between the monitoring result, the acquired temperature value and the first preset threshold value to determine whether the battery heating system is failed.
Specifically, when the second temperature value is not greater than a first preset threshold value, or the monitoring result indicates that the battery heating system is in a failure state, it is determined that the battery heating system is failed. And determining that the battery heating system is not invalid under the condition that the first temperature value and the second temperature value are both greater than a first preset threshold value and the monitoring result shows that the battery heating system is in a normal state. The battery heating system is determined not to be failed only when the first temperature value and the second temperature value are respectively greater than a first preset threshold value and the two conditions that the battery heating system is in a normal state are met at the same time, and the battery heating system is determined to be failed once any one of the conditions is not met.
After determining that the battery heating system is invalid, the detection system can output early warning prompt information to remind relevant workers to replace the battery heating system in time, so that smooth heating of the battery heating system on the battery pack in a low-temperature environment is guaranteed, and normal use of the battery pack is further guaranteed.
In the embodiment, the detection method of the battery heating system is combined with the detection methods of other battery heating systems, so that the accuracy of the detection result can be effectively improved.
Fig. 3 is a process diagram illustrating a method for detecting a battery heating system according to an embodiment of the present application. The battery heating system detection method of the present application will be described in detail below with reference to fig. 3.
In fig. 3, when the detection system determines that the battery pack is currently in a low-temperature environment, the detection system starts a detection program, first executes step1, reads the lowest cell temperature of the battery pack, then executes step2, determines whether the lowest cell temperature is within a normal use interval, stops the detection program if the lowest cell temperature is within the normal use interval, and otherwise enters step3 to detect whether the battery management system of the battery pack is in a fault state. If the battery management system of the battery pack is in a fault state, the detection program is stopped, otherwise step4 is entered, and whether the battery pack sends a heating request to the battery management system and whether the battery pack is in a heating state after sending the heating request to the battery management system are detected. If a heating request is sent to the battery management system and the battery management system is in a heating state, step5 is entered, and the charge parameters of the battery pack are obtained. When the charge parameter indicates that the amount of charge of the battery pack is sufficient, at time T during the time when the battery pack is in the heating state, a first temperature value T1 at the heating medium inlet of the battery heating system is first obtained, and at time (T +300s) that is 300s apart from time T, a second temperature value T2 at the heating medium inlet of the battery heating system is obtained. And then step6 is executed, whether the first temperature value T1 and the second temperature value T2 are both larger than the preset temperature value is judged, and if the first temperature value T1 and the second temperature value T2 are both larger than the preset temperature value by 10 ℃, the battery heating system is not failed. Otherwise, executing step7, judging whether the second temperature value T2 is greater than the preset temperature value, if the second temperature value T2 is not greater than the preset temperature value 10 ℃, indicating that the battery heating system is invalid, and outputting an early warning prompt to remind related workers of replacing the battery heating system in time, so that the battery heating system is guaranteed to heat the battery pack smoothly in a low-temperature environment. Step6 and step7 may be performed alternately, that is, step7 is performed first, and then step6 is performed, which is not limited in this embodiment.
According to the battery heating system detection method, whether the battery heating system is invalid or not is determined by monitoring the temperature value of the heating medium of the battery heating system in real time, and the battery heating system can be replaced by related workers in time, so that the battery heating system is enabled to heat the battery pack smoothly in a low-temperature environment, and normal use of the battery pack is further guaranteed.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the embodiments are not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the embodiments. Further, those skilled in the art will also appreciate that the embodiments described in the specification are presently preferred and that no particular act is required of the embodiments of the application.
Based on the same inventive concept, an embodiment of the present application provides a battery heating system detection apparatus 400. Referring to fig. 4, fig. 4 is a block diagram of a detection device of a battery heating system according to an embodiment of the present disclosure. As shown in fig. 4, the apparatus 400 includes:
a first obtaining module 401, configured to obtain a first temperature value at a heating medium inlet of the battery heating system at a first time during a heating state of the battery pack;
a second obtaining module 402, configured to obtain a second temperature value at a heating medium inlet of the battery heating system at a second time that is separated from the first time by a preset time period;
a first determining module 403, configured to determine whether the battery heating system fails according to a magnitude relationship between the first temperature value and a first preset threshold, and a magnitude relationship between the second temperature value and the first preset threshold.
Optionally, the apparatus 400 further comprises:
the third obtaining module is used for obtaining a third temperature value of the battery monomer with the lowest temperature in the battery pack under the condition that the battery pack is not in a heating state;
the first detection module is used for detecting whether a battery management system of the battery pack is in a fault state or not under the condition that the third temperature value is in a preset interval;
the second detection module is used for detecting whether the battery pack sends a heating request to the battery management system or not and whether the battery pack is in a heating state after sending the heating request to the battery management system or not under the condition that the battery management system is not in a fault state;
and the second determination module is used for determining the time period when the battery pack is in the heating state and the battery pack has sent the heating request to the battery management system, and determining that the battery pack is in the heating state.
Optionally, the apparatus 400 further comprises:
the third detection module is used for detecting the ambient temperature of the battery pack;
the third obtaining module includes:
and the first obtaining submodule is used for obtaining a third temperature value of the battery monomer with the lowest temperature in the battery pack under the condition that the environment temperature is not greater than a second preset threshold and the battery pack is not in a heating state.
Optionally, the apparatus 400 further comprises:
the fourth obtaining module is used for obtaining the charge parameters of the battery pack when the battery pack is in a heating state;
the first obtaining module 401 includes:
the second obtaining submodule is used for obtaining a first temperature value at a heating medium inlet of the battery heating system at a first moment during the heating state of the battery pack under the condition that the charge parameter is larger than a third preset threshold;
the apparatus 400 further comprises:
and the control module is used for controlling the battery heating system to stop heating the battery pack by using the electric energy of the battery pack under the condition that the charge parameter is not larger than the third preset threshold value.
Optionally, the apparatus 400 further comprises:
the fifth obtaining module is used for monitoring the working state of each element of the battery heating system to obtain a monitoring result;
the first determination module 403 includes:
the first determining submodule is used for determining that the battery heating system is failed under the condition that the second temperature value is not larger than the first preset threshold value or the monitoring result shows that the battery heating system is in a failure state;
the second determining submodule is used for determining that the battery heating system does not fail under the condition that the first temperature value and the second temperature value are respectively greater than the first preset threshold value and the monitoring result shows that the battery heating system is in a normal state;
the apparatus 400 further comprises:
and the output module is used for outputting early warning information under the condition that the battery heating system is determined to be invalid. For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
An embodiment of the present application further provides a vehicle, including:
one or more processors; and
one or more machine readable media having instructions stored thereon, which when executed by the one or more processors, cause the vehicle to perform the steps of the method of embodiments of the present application.
Embodiments of the present application also provide a computer-readable storage medium having stored thereon instructions, which, when executed by one or more processors, cause the processors to perform the steps of the method described in embodiments of the present application.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The battery heating system detection method, the battery heating system detection device, the vehicle and the storage medium are provided. The detailed description is given, and the principle and the implementation of the present application are explained by applying specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A battery heating system testing method, comprising:
at a first moment during the heating state of the battery pack, obtaining a first temperature value at a heating medium inlet of the battery heating system;
obtaining a second temperature value at a heating medium inlet of the battery heating system at a second moment separated from the first moment by a preset time length;
and determining whether the battery heating system fails or not according to the magnitude relation between the first temperature value and a first preset threshold value and the magnitude relation between the second temperature value and the first preset threshold value.
2. The method of claim 1, further comprising:
under the condition that the battery pack is not in a heating state, obtaining a third temperature value of a battery monomer with the lowest temperature in the battery pack;
detecting whether a battery management system of the battery pack is in a fault state or not under the condition that the third temperature value is in a preset interval;
under the condition that the battery management system is not in a fault state, detecting whether the battery pack sends a heating request to the battery management system or not, and whether the battery pack is in a heating state after sending the heating request to the battery management system or not;
and determining the time period when the battery pack is in the heating state and the battery pack has sent the heating request to the battery management system, as the time period when the battery pack is in the heating state.
3. The method of claim 2, further comprising:
detecting the ambient temperature of the battery pack;
under the condition that the battery pack is not in a heating state, obtaining a third temperature value of a battery cell with the lowest temperature in the battery pack, wherein the third temperature value comprises the following steps:
and under the condition that the environmental temperature is not greater than a second preset threshold value and the battery pack is not in a heating state, obtaining a third temperature value of the battery monomer with the lowest temperature in the battery pack.
4. The method according to any one of claims 1-3, further comprising:
obtaining a charge parameter of the battery pack during the heating state of the battery pack;
obtaining a first temperature value at a heating medium inlet of the battery heating system at a first time during a heating state of a battery pack, comprising:
under the condition that the charge parameter is larger than a third preset threshold value, obtaining a first temperature value at a heating medium inlet of the battery heating system at a first moment during the heating state of the battery pack;
the method further comprises the following steps:
and under the condition that the charge parameter is not larger than the third preset threshold, controlling the battery heating system to stop heating the battery pack by using the electric energy of the battery pack.
5. The method of claim 1, further comprising:
monitoring the working state of each element of the battery heating system to obtain a monitoring result;
determining whether the battery heating system fails according to the magnitude relation between the first temperature value and the second temperature value and a first preset threshold value respectively, including:
determining that the battery heating system is invalid when the second temperature value is not greater than the first preset threshold value or the monitoring result indicates that the battery heating system is in a failure state;
determining that the battery heating system is not failed under the condition that the first temperature value and the second temperature value are respectively greater than the first preset threshold value and the monitoring result shows that the battery heating system is in a normal state;
the method further comprises the following steps:
and outputting early warning information under the condition that the battery heating system is determined to be invalid.
6. A battery heating system testing apparatus, comprising:
the battery heating system comprises a first obtaining module, a second obtaining module and a control module, wherein the first obtaining module is used for obtaining a first temperature value at a heating medium inlet of the battery heating system at a first moment during a heating state of a battery pack;
the second obtaining module is used for obtaining a second temperature value at a heating medium inlet of the battery heating system at a second moment which is separated from the first moment by a preset time length;
and the first determining module is used for determining whether the battery heating system fails or not according to the magnitude relation between the first temperature value and a first preset threshold value and the magnitude relation between the second temperature value and the first preset threshold value.
7. The apparatus of claim 6, further comprising:
the third obtaining module is used for obtaining a third temperature value of the battery monomer with the lowest temperature in the battery pack under the condition that the battery pack is not in a heating state;
the first detection module is used for detecting whether a battery management system of the battery pack is in a fault state or not under the condition that the third temperature value is in a preset interval;
the second detection module is used for detecting whether the battery pack sends a heating request to the battery management system or not and whether the battery pack is in a heating state after sending the heating request to the battery management system or not under the condition that the battery management system is not in a fault state;
and the second determination module is used for determining the time period when the battery pack is in the heating state and the battery pack has sent the heating request to the battery management system, and determining that the battery pack is in the heating state.
8. The apparatus of claim 7, further comprising:
the third detection module is used for detecting the ambient temperature of the battery pack;
the third obtaining module includes:
and the first obtaining submodule is used for obtaining a third temperature value of the battery monomer with the lowest temperature in the battery pack under the condition that the environment temperature is not greater than a second preset threshold and the battery pack is not in a heating state.
9. A vehicle, characterized by comprising:
one or more processors; and
one or more machine readable media having instructions stored thereon that, when executed by the one or more processors, cause the vehicle to perform the steps of the method of one or more of claims 1-5.
10. A computer-readable storage medium having stored thereon instructions, which, when executed by one or more processors, cause the processors to perform the steps of the method of one or more of claims 1-5.
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| CN202011631481.8A CN112838295B (en) | 2020-12-30 | 2020-12-30 | Battery heating system detection method and device, vehicle and storage medium |
| PCT/CN2021/142087 WO2022143668A1 (en) | 2020-12-30 | 2021-12-28 | Method and apparatus for detecting battery heating system, and vehicle and storage medium |
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| CN202011631481.8A CN112838295B (en) | 2020-12-30 | 2020-12-30 | Battery heating system detection method and device, vehicle and storage medium |
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| CN115659790B (en) * | 2022-10-13 | 2024-02-06 | 厦门宇电自动化科技有限公司 | Real-time temperature detection method for power battery pack |
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| WO2022143668A1 (en) | 2022-07-07 |
| CN112838295B (en) | 2022-05-10 |
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