New energy automobile safety detection method

Abstract

The invention discloses a new energy automobile safety detection method, and relates to the technical field of new energy automobile detection. The method comprises the steps of obtaining the vibration intensity of the new energy automobile; inputting the vibration intensity into a control module for safety detection to obtain a safety detection result, and judging whether the safety detection result indicates that the vibration intensity has a safety threat or not; when the safety detection result indicates that the vibration intensity has the safety threat, acquiring the temperature of any battery monomer of the new energy automobile; calculating the cumulative duration when the temperature of any battery monomer is higher than a preset temperature, and determining the operation condition of the battery pack of the new energy automobile according to the cumulative duration and a cumulative duration threshold value; and according to the operation condition of the battery pack of the new energy automobile, executing a safety instruction on the new energy automobile. According to the invention, multi-level detection can be carried out on the new energy vehicle, and the safety performance and the use effect of the new energy vehicle can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicle detection, and in particular relates to a new energy vehicle safety detection method. Background Art

[0002] New energy vehicles include pure electric vehicles, plug-in hybrid vehicles and fuel cell vehicles. The power systems of these vehicles are different from those of traditional fuel vehicles. They mainly rely on batteries, supercapacitors or fuel cells to store and provide energy. As the source of power for new energy vehicles, the safety of batteries is crucial to new energy vehicles. Therefore, it is necessary to conduct safety inspections on the batteries of new energy vehicles to prevent accidents. However, some existing safety inspection methods for new energy vehicles cut off the power supply to the batteries of new energy vehicles after the new energy vehicles receive large impact vibrations. This method is prone to misjudgment, resulting in low accuracy in safety inspections of new energy vehicles. Therefore, it is urgent to study a new energy vehicle safety inspection method to solve the above problems. Summary of the invention

[0003] The present invention provides a new energy vehicle safety detection method, the purpose of which is to solve the technical problems raised in the above background technology.

[0004] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The present invention is a new energy vehicle safety detection method, the new energy vehicle comprises a control module and a battery pack; the battery pack comprises at least one battery cell; the method comprises: obtaining the vibration intensity of the new energy vehicle; inputting the vibration intensity into the control module for safety detection, obtaining a safety detection result, and judging whether the safety detection result indicates that the vibration intensity poses a safety threat; when the safety detection result indicates that the vibration intensity poses a safety threat, obtaining the temperature of any battery cell of the new energy vehicle; calculating the cumulative time that the temperature of any battery cell is higher than a preset temperature, and determining the operating condition of the battery pack of the new energy vehicle according to the cumulative time and a cumulative time threshold; executing safety instructions on the new energy vehicle according to the operating condition of the battery pack of the new energy vehicle, the safety instructions being used to control the new energy vehicle to perform safety operations.

[0006] As a preferred technical solution of the present invention, obtaining the vibration intensity of the new energy vehicle includes: installing vibration sensors on the front, rear and doors of the new energy vehicle respectively; and multiple vibration sensors respectively detect the vibration intensity of the new energy vehicle.

[0007] As a preferred technical solution of the present invention, the vibration intensity is input into a control module for safety detection, a safety detection result is obtained, and it is determined whether the safety detection result indicates that the vibration intensity poses a safety threat, including: presetting a vibration intensity threshold and a first safety threshold in the control module; determining a first ratio between the vibration intensity and the vibration intensity threshold; when the first ratio is greater than the first safety threshold, determining that the vibration intensity poses a safety threat; when the first ratio is less than the first safety threshold, determining that the vibration intensity does not pose a safety threat.

[0008] As a preferred technical solution of the present invention, the control module averages the sum of the vibration intensities detected by the plurality of vibration sensors and compares the average with the vibration intensity threshold.

[0009] As a preferred technical solution of the present invention, determining the operating condition of the battery pack of the new energy vehicle based on the cumulative time and the cumulative time threshold includes: presetting the cumulative time threshold and the second safety threshold in the control module; determining a second ratio between the cumulative time and the cumulative time threshold; when the second ratio is greater than the second safety threshold, determining that the cumulative time during which the temperature of any battery cell is higher than the preset temperature poses a safety threat; when the second ratio is less than the second safety threshold, determining that the cumulative time during which the temperature of any battery cell is higher than the preset temperature poses no safety threat.

[0010] As a preferred technical solution of the present invention, the method includes: determining the operating status of the battery pack of the new energy vehicle based on the cumulative time and the cumulative time threshold; wherein, when there is a safety threat to any of the battery cells, it indicates that there is a safety threat to the battery pack of the new energy vehicle.

[0011] As a preferred technical solution of the present invention, the safety operation includes disconnecting the charging circuit and the discharging circuit of the battery pack of the new energy vehicle.

[0012] A computer-readable storage medium is characterized in that computer program instructions are stored on the computer-readable storage medium, and when the computer program instructions are read and executed by a computer, the method described above is executed.

[0013] The present invention has the following beneficial effects:

[0014] The present invention obtains the vibration intensity of the new energy vehicle in real time, and inputs the vibration intensity into a control module for safety detection to obtain a safety detection result. When the safety detection result indicates that the vibration intensity poses a safety threat, the temperature of any battery cell of the new energy vehicle is obtained, and the cumulative time that the temperature of any battery cell is higher than a preset temperature is calculated, and then the operation status of the battery pack of the new energy vehicle is determined according to the cumulative time and the cumulative time threshold. Finally, according to the operation status of the battery pack of the new energy vehicle, safety instructions are executed on the new energy vehicle. Not only can multi-level detection be performed on the new energy vehicle, but also problems such as misjudgment can be effectively reduced, and the accuracy of battery safety detection of the new energy vehicle is effectively improved, thereby helping to improve the safety performance and use effect of the new energy vehicle.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 The present invention is a flow chart of a new energy vehicle safety detection method. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1 As shown, the present invention is a new energy vehicle safety detection method, the new energy vehicle includes a control module and a battery pack; the control module can be an integrated circuit chip with signal processing capability; the control module can also be a general processor, for example, it can be a digital signal processor, a dedicated integrated circuit, a discrete gate or transistor logic device, a discrete hardware component, which can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application; in addition, the general processor can be a microprocessor or any conventional processor, etc.; the battery pack includes a plurality of battery cells arranged side by side; the method includes:

[0020] Step 1: Obtain the vibration intensity of new energy vehicles.

[0021] Specifically, conventional vibration sensors in the field are installed at the front, rear and doors of the new energy vehicle respectively; multiple vibration sensors respectively detect the vibration intensity of the new energy vehicle in real time, and feed back the detection results to the control module in real time.

[0022] Step 2: Input the vibration intensity into the control module for safety detection, obtain the safety detection result, and determine whether the safety detection result indicates that the vibration intensity poses a safety threat.

[0023] Specifically, a vibration intensity threshold and a first safety threshold are preset in the control module; a first ratio between the vibration intensity and the vibration intensity threshold is determined; when the first ratio is greater than the first safety threshold, it is determined that the vibration intensity poses a safety threat; when the first ratio is less than the first safety threshold, it is determined that the vibration intensity does not pose a safety threat; wherein the control module averages the sum of the vibration intensities detected by multiple vibration sensors and compares it with the vibration intensity threshold to form a first ratio.

[0024] In addition, the vibration intensity threshold and the first safety threshold are determined by the comprehensive use conditions of the new energy vehicle, and the control module can regularly update the vibration intensity threshold and the first safety threshold.

[0025] Step 3: When the safety detection result indicates that the vibration intensity poses a safety threat, the temperature of any battery cell of the new energy vehicle is obtained.

[0026] It should be noted that a battery pack is composed of multiple battery cells, and each battery cell is connected to the battery management system; one or more temperature sensors (i.e., the acquisition module of the battery management system) are arranged on the surface of each battery cell; the number of temperature sensors arranged on the battery cell is related to the risk level of each battery cell in the battery pack; the higher the risk level of the battery cell, the more temperature sensors are arranged; for example, a high-risk battery cell can be provided with three temperature sensors on the upper and lower surfaces and any side surface, while a low-risk battery cell can be provided with two temperature sensors on the upper surface or the lower surface and any side surface.

[0027] In addition, during the operation of the battery pack of a new energy vehicle, the temperature sensor collects the temperature every 0.5s and sends the temperature to the controller of the battery management system; if only one temperature sensor is set on the battery cell, the temperature collected by the temperature sensor is the temperature of the battery cell; if multiple temperature sensors are set on the battery cell, the average value of the temperatures collected by the multiple temperature sensors is taken as the temperature of the battery cell.

[0028] Step 4: Calculate the cumulative time that the temperature of any battery cell is higher than the preset temperature, and determine the operating status of the battery pack of the new energy vehicle based on the cumulative time and the cumulative time threshold; wherein, when there is a safety threat to any of the battery cells, it indicates that there is a safety threat to the battery pack of the new energy vehicle.

[0029] It should be noted that after obtaining the temperature of the battery cell in real time, the temperature of the battery cell is compared with the preset temperature to determine the cumulative time that the battery cell is higher than the preset temperature; the preset temperature is the damage temperature of the battery cell; when the temperature of the battery cell is higher than the preset temperature for a long time, the battery cell will leak or explode. The preset temperature is determined according to the material of the battery cell; for example, when the battery cell is a cylindrical battery or a square shell battery, the preset temperature is 65°C.

[0030] It can be understood that the battery management system obtains the temperature of the battery cell in real time and compares the temperature of the battery cell with the preset temperature. The battery management system records the duration of each time the temperature of the battery cell is higher than the preset temperature. When the cumulative time of the battery cell being higher than the preset temperature is reached, it is fed back to the control module, and the control module then processes it.

[0031] Specifically, a cumulative time threshold and a second safety threshold are preset in the control module; a second ratio between the cumulative time and the cumulative time threshold is determined; when the second ratio is greater than the second safety threshold, it is determined that the cumulative time during which the temperature of any battery cell is higher than the preset temperature poses a safety threat; when the second ratio is less than the second safety threshold, it is determined that the cumulative time during which the temperature of any battery cell is higher than the preset temperature poses no safety threat.

[0032] In addition, the cumulative time threshold and the second safety threshold are determined by the operating service time of the battery pack of the new energy vehicle, and the control module can modify the vibration intensity threshold and the first safety threshold.

[0033] Step 5: Execute safety instructions on the new energy vehicle according to the operating conditions of the battery pack of the new energy vehicle, where the safety instructions are used to control the new energy vehicle to perform safety operations; wherein the safety operations include disconnecting the charging circuit and the discharging circuit of the battery pack of the new energy vehicle.

[0034] In summary, in this embodiment, the vibration intensity of the new energy vehicle is first obtained in real time, and the vibration intensity is input into the control module for safety detection to obtain a safety detection result. When the safety detection result indicates that the vibration intensity poses a safety threat, the temperature of any battery cell of the new energy vehicle is obtained, and the cumulative time that the temperature of any battery cell is higher than the preset temperature is calculated. The operating status of the battery pack of the new energy vehicle is determined based on the cumulative time and the cumulative time threshold. Finally, based on the operating status of the battery pack of the new energy vehicle, safety instructions are executed on the new energy vehicle. This not only enables multi-level detection of new energy vehicles, but also effectively reduces problems such as misjudgment, effectively improves the accuracy of battery safety detection of new energy vehicles, and thus helps to improve the safety performance and use effect of new energy vehicles.

[0035] In addition, an embodiment of the present application also provides a computer-readable storage medium, on which computer program instructions are stored. When the computer program instructions are read and executed by a computer, the new energy vehicle safety detection method in the above embodiment is executed.

[0036] The storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more available media. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)).

[0037] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A new energy vehicle safety detection method, characterized in that: The new energy vehicle comprises a control module and a battery pack; the battery pack comprises at least one battery cell; the method comprises: Obtaining the vibration intensity of the new energy vehicle; Inputting the vibration intensity into a control module for safety detection, obtaining a safety detection result, and determining whether the safety detection result indicates that the vibration intensity poses a safety threat; When the safety detection result indicates that the vibration intensity poses a safety threat, obtaining the temperature of any battery cell of the new energy vehicle; Calculating the cumulative time that the temperature of any battery cell is higher than a preset temperature, and determining the operation status of the battery pack of the new energy vehicle according to the cumulative time and the cumulative time threshold; According to the operation status of the battery pack of the new energy vehicle, a safety instruction is executed on the new energy vehicle, and the safety instruction is used to control the new energy vehicle to perform a safe operation.

2. A new energy vehicle safety detection method according to claim 1, characterized in that: The obtaining of the vibration intensity of the new energy vehicle comprises: installing vibration sensors on the front, rear and doors of the new energy vehicle respectively; and a plurality of the vibration sensors respectively detect the vibration intensity of the new energy vehicle.

3. A new energy vehicle safety detection method according to claim 2, characterized in that: The step of inputting the vibration intensity into a control module for safety detection, obtaining a safety detection result, and determining whether the safety detection result indicates that the vibration intensity poses a safety threat comprises: presetting a vibration intensity threshold and a first safety threshold in the control module; determining a first ratio between the vibration intensity and the vibration intensity threshold; determining that the vibration intensity poses a safety threat when the first ratio is greater than the first safety threshold; and determining that the vibration intensity poses no safety threat when the first ratio is less than the first safety threshold.

4. A new energy vehicle safety detection method according to claim 3, characterized in that: The control module averages the sum of the vibration intensities detected by the plurality of vibration sensors and compares the average with the vibration intensity threshold.

5. A new energy vehicle safety detection method according to claim 4, characterized in that: The method of determining the operating condition of the battery pack of the new energy vehicle based on the cumulative time and the cumulative time threshold includes: presetting the cumulative time threshold and the second safety threshold in the control module; determining a second ratio between the cumulative time and the cumulative time threshold; when the second ratio is greater than the second safety threshold, determining that there is a safety threat due to the cumulative time during which the temperature of any battery cell is higher than the preset temperature; when the second ratio is less than the second safety threshold, determining that there is no safety threat due to the cumulative time during which the temperature of any battery cell is higher than the preset temperature.

6. A new energy vehicle safety detection method according to claim 5, characterized in that: The method includes: determining the operating status of the battery pack of the new energy vehicle according to the accumulated time and the accumulated time threshold; wherein, when there is a safety threat to any of the battery cells, it indicates that there is a safety threat to the battery pack of the new energy vehicle.

7. A new energy vehicle safety detection method according to claim 6, characterized in that: The safety operation includes disconnecting a charging circuit and a discharging circuit of the battery pack of the new energy vehicle.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, and when the computer program instructions are read and executed by a computer, the method according to any one of claims 1 to 7 is executed.

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