Battery high-voltage monitoring method and device for electric vehicle, electronic equipment and medium

Abstract

The application provides a battery high-voltage monitoring method and device for an electric vehicle, an electronic device and a medium, and the method comprises the following steps: acquiring battery collection parameters and an acquisition ambient temperature of the electric vehicle, and a correction coefficient under the acquisition ambient temperature; correcting the battery collection parameters according to the correction coefficient to obtain real battery parameters of the electric vehicle; and sending the real battery parameters to a battery management system. The battery collection parameters are corrected by the correction coefficient corresponding to the acquisition ambient temperature of the battery collection parameters, so that more accurate battery parameters can be obtained, and the battery management performance of the battery management system is improved.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and more specifically, to a method, apparatus, electronic device, and medium for monitoring high voltage in electric vehicle batteries. Background Technology

[0002] Currently, high-voltage monitoring of electric vehicle batteries mainly involves transmitting the collected battery parameters (such as total battery voltage and total battery current) to the battery management system, so that the battery management system can manage the battery based on these parameters.

[0003] However, in practical applications, the temperature of the sampling environment significantly affects the accuracy of battery parameter acquisition, leading to inaccurate battery parameters and consequently impacting the battery management performance of the battery management system. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a method, device, electronic device and medium for monitoring high voltage of electric vehicle batteries, which can collect more accurate battery parameters and thereby improve the battery management performance of the battery management system.

[0005] In a first aspect, embodiments of this application provide a method for monitoring the high voltage of an electric vehicle battery, the method comprising:

[0006] Acquire the battery data acquisition parameters of the electric vehicle and the ambient temperature of the data acquisition environment, as well as the correction coefficient corresponding to the ambient temperature; different ambient temperatures correspond to different correction coefficients; the correction coefficient is used to describe the relationship between the battery data acquisition parameters and the actual battery parameters;

[0007] The battery-collected parameters are corrected based on the correction factor to obtain the true battery parameters of the electric vehicle.

[0008] Send the actual battery parameters to the battery management system.

[0009] In one possible implementation, the battery acquisition parameters include the total battery voltage and the total battery current; the correction coefficients include a total voltage correction coefficient and a total current correction coefficient; the battery acquisition parameters are corrected according to the correction coefficients to obtain the true battery parameters of the electric vehicle, including:

[0010] The total voltage collected by the battery is corrected according to the total voltage correction factor to obtain the true total voltage of the electric vehicle's battery;

[0011] The total current collected by the battery is corrected according to the total current correction factor to obtain the true total current of the electric vehicle's battery.

[0012] In one possible implementation, the total voltage correction factor includes a total voltage correction slope and a total voltage correction intercept; the total voltage collected by the battery is corrected according to the total voltage correction factor to obtain the true total battery voltage of the electric vehicle, including:

[0013] Substitute the total voltage correction factor and the total battery voltage into the following total voltage correction formula to obtain the true total battery voltage of the electric vehicle;

[0014] y1 = k1x1 + b1;

[0015] Where y1 is the actual total battery voltage, k1 is the total voltage correction slope, x1 is the total battery voltage collected, and b1 is the total voltage correction intercept.

[0016] In one possible implementation, the total voltage correction factor includes a total current correction slope and a total current correction intercept; the total current collected by the battery is corrected according to the total current correction factor to obtain the true total current of the electric vehicle's battery, including:

[0017] Substitute the total current correction factor and the total battery current into the following total current correction formula to obtain the true total battery current of the electric vehicle.

[0018] y2 = k2x2 + b2;

[0019] Where y2 is the actual total battery current, k2 is the total current correction slope, x2 is the total battery current collected, and b2 is the total current correction intercept.

[0020] In one possible implementation, the correction coefficient corresponding to the ambient temperature is obtained through the following steps:

[0021] Acquire the reference voltages corresponding to at least two external high-precision reference power supplies, and the total voltage sample value of the output of the external high-precision reference power supplies acquired at the ambient temperature.

[0022] Substitute the reference voltage and total voltage sampled values ​​corresponding to all external high-precision reference power supplies into the total voltage correction formula to obtain the total voltage correction coefficient under the ambient temperature of the acquisition.

[0023] In one possible implementation, the correction coefficient corresponding to the ambient temperature is obtained through the following steps:

[0024] Acquire the reference current corresponding to at least two external high-precision reference current sources, and the total current sample value of the output of the external high-precision reference power supply acquired at the acquisition ambient temperature;

[0025] Substitute the reference current and total current sampling values ​​corresponding to all external high-precision reference current sources into the total current correction formula to obtain the total current correction coefficient under the ambient temperature of the sampling environment.

[0026] Secondly, embodiments of this application also provide a battery high-voltage monitoring device for electric vehicles, the device comprising:

[0027] The acquisition module is used to acquire the battery acquisition parameters of the electric vehicle and the ambient temperature of the battery acquisition parameters, as well as the correction coefficient corresponding to the ambient temperature. Different ambient temperatures correspond to different correction coefficients. The correction coefficient is used to describe the relationship between the battery acquisition parameters and the actual battery parameters.

[0028] The correction module is used to correct the battery acquisition parameters according to the correction coefficient to obtain the true battery parameters of the electric vehicle.

[0029] The sending module is used to send the actual battery parameters to the battery management system.

[0030] In one possible implementation, the battery acquisition parameters include the total battery acquisition voltage and the total battery acquisition current; the correction coefficients include a total voltage correction coefficient and a total current correction coefficient; the correction module is specifically used to correct the total battery acquisition voltage according to the total voltage correction coefficient to obtain the true total battery voltage of the electric vehicle; and to correct the total battery acquisition current according to the total current correction coefficient to obtain the true total battery current of the electric vehicle.

[0031] In one possible implementation, the total voltage correction factor includes the total voltage correction slope and the total voltage correction intercept; the correction module is specifically used to substitute the total voltage correction factor and the total battery voltage into the following total voltage correction formula to obtain the true total battery voltage of the electric vehicle.

[0032] y1 = k1x1 + b1;

[0033] Where y1 is the actual total battery voltage, k1 is the total voltage correction slope, x1 is the total battery voltage collected, and b1 is the total voltage correction intercept.

[0034] In one possible implementation, the total voltage correction factor includes the total current correction slope and the total current correction intercept; the correction module is specifically used to substitute the total current correction factor and the total current collected by the battery into the following total current correction formula to obtain the true total current of the electric vehicle's battery.

[0035] y2 = k2x2 + b2;

[0036] Where y2 is the actual total battery current, k2 is the total current correction slope, x2 is the total battery current collected, and b2 is the total current correction intercept.

[0037] In one possible implementation, the acquisition module is specifically used to acquire the reference voltages corresponding to at least two external high-precision reference power supplies, and the total voltage sample value of the output of the external high-precision reference power supplies acquired at the acquisition ambient temperature; and to substitute the reference voltages corresponding to all external high-precision reference power supplies and the total voltage sample value into the total voltage correction formula to obtain the total voltage correction coefficient at the acquisition ambient temperature.

[0038] In one possible implementation, the acquisition module is specifically used to acquire the reference currents corresponding to at least two external high-precision reference current sources and the total current sampling value of the external high-precision reference power supply output acquired at the acquisition ambient temperature; and to substitute the reference currents corresponding to all external high-precision reference current sources and the total current sampling value into the total current correction formula to obtain the total current correction coefficient at the acquisition ambient temperature.

[0039] Thirdly, embodiments of this application also provide an electronic device, including: a processor, a storage medium, and a bus. The storage medium stores machine-readable instructions executable by the processor. When the electronic device is running, the processor communicates with the storage medium via the bus, and the processor executes the machine-readable instructions to perform the steps of the battery high-voltage monitoring method for any of the first aspects of the electric vehicle.

[0040] Fourthly, embodiments of this application also provide a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the steps of the battery high-voltage monitoring method for any of the first aspects of an electric vehicle.

[0041] This application provides a method, apparatus, electronic device, and medium for high-voltage monitoring of electric vehicle batteries. The method includes: acquiring battery acquisition parameters and ambient temperature of the electric vehicle, as well as a correction coefficient at the ambient temperature; correcting the battery acquisition parameters according to the correction coefficient to obtain the true battery parameters of the electric vehicle; and sending the true battery parameters to a battery management system. This application corrects the battery acquisition parameters using a correction coefficient corresponding to the ambient temperature of the battery acquisition parameters, thereby obtaining more accurate battery parameters and improving the battery management performance of the battery management system. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1A flowchart of a battery high-voltage monitoring method for an electric vehicle provided in an embodiment of this application is shown;

[0044] Figure 2 A flowchart of another battery high-voltage monitoring method for electric vehicles provided in an embodiment of this application is shown;

[0045] Figure 3 A schematic diagram of the structure of a battery high-voltage monitoring device for an electric vehicle provided in an embodiment of this application is shown;

[0046] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of this application is shown. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the accompanying drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0048] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0049] To enable those skilled in the art to utilize the content of this application, and in conjunction with the specific application scenario of "electric vehicle technology," the following embodiments are provided. For those skilled in the art, the general principles defined herein can be applied to other embodiments and application scenarios without departing from the spirit and scope of this application. Although this application is primarily described within the "electric vehicle technology field," it should be understood that this is merely an exemplary embodiment.

[0050] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.

[0051] The following is a detailed description of a battery high-voltage monitoring method for electric vehicles provided in the embodiments of this application.

[0052] Reference Figure 1 The diagram shown is a flowchart illustrating a battery high-voltage monitoring method for an electric vehicle provided in this application embodiment. This method is applied to a battery high-voltage monitoring device, and the specific execution process of the battery high-voltage monitoring method for the electric vehicle is as follows:

[0053] S101. Obtain the battery acquisition parameters of the electric vehicle and the ambient temperature of the battery acquisition parameters, as well as the correction coefficient corresponding to the ambient temperature.

[0054] S102. Correct the battery acquisition parameters according to the correction coefficient to obtain the true battery parameters of the electric vehicle.

[0055] S103. Send the actual battery parameters to the battery management system.

[0056] This application provides a method for high-voltage monitoring of an electric vehicle battery. The method includes: acquiring battery acquisition parameters and ambient temperature of the electric vehicle, as well as a correction coefficient at that ambient temperature; correcting the battery acquisition parameters according to the correction coefficient to obtain the true battery parameters of the electric vehicle; and sending the true battery parameters to a battery management system. This application corrects the battery acquisition parameters using a correction coefficient corresponding to the ambient temperature of the battery acquisition parameters, thereby obtaining more accurate battery parameters and improving the battery management performance of the battery management system.

[0057] The exemplary steps of the embodiments of this application are described below:

[0058] S101. Obtain the battery acquisition parameters of the electric vehicle and the ambient temperature of the battery acquisition parameters, as well as the correction coefficient corresponding to the ambient temperature.

[0059] In this embodiment of the application, the parameters of the battery in the electric vehicle (specifically the total voltage and total current) are collected to obtain the battery collection parameters; the collection ambient temperature refers to the ambient temperature of the collection device used to collect the battery collection parameters.

[0060] The battery acquisition parameters include the total battery voltage (including the voltage of the battery voltage divider module and the battery switch module) and the total battery current. Different acquisition ambient temperatures correspond to different correction coefficients. The correction coefficients are used to describe the relationship between the battery acquisition parameters and the actual battery parameters. The correction coefficients include the total voltage correction coefficient and the total current correction coefficient. The total voltage correction coefficient is used to correct the value of the total battery voltage, and the total current correction coefficient is used to correct the value of the total battery current.

[0061] Furthermore, the total voltage correction factor in the correction factor corresponding to the ambient temperature is obtained through the following steps:

[0062] Step 1: Obtain the reference voltages corresponding to at least two external high-precision reference power supplies, and the total voltage sample value of the output of the external high-precision reference power supplies acquired at the ambient temperature of the acquisition.

[0063] In this embodiment, the external high-precision reference power supply is a power supply that provides a stable voltage output. The reference voltage refers to the known and stable voltage output by the external high-precision reference power supply. The total voltage sample value refers to the total voltage output by the external high-precision reference power supply collected by the acquisition device. Different external high-precision reference power supplies correspond to different reference voltages.

[0064] Step 2: Substitute the reference voltage and total voltage sampled values ​​corresponding to all external high-precision reference power supplies into the total voltage correction formula to obtain the total voltage correction coefficient under the ambient temperature of the sampling environment.

[0065] In this embodiment, external high-precision reference power supplies are grouped according to the number of total voltage correction coefficients in the total voltage correction formula to obtain external high-precision reference power supply groups. For each external high-precision reference power supply group, the reference voltage and total voltage sampled value corresponding to that external high-precision reference power supply group are substituted into the total voltage correction formula to obtain the initial total voltage correction coefficient at the ambient temperature. The target total voltage correction coefficient is calculated based on all the initial total voltage correction coefficients.

[0066] The total voltage correction formula is used to characterize the relationship between the collected total voltage (which can refer to the total voltage sample value) and the actual total voltage (which can refer to the reference voltage). It can be a linear relationship or a non-linear relationship, depending on the actual situation.

[0067] Specifically, calculating the target total voltage correction factor based on all initial total voltage correction factors includes: determining the average value of all initial total voltage correction factors as the target total voltage correction factor; and performing a weighted summation of all initial total voltage correction factors to obtain the target total voltage correction factor.

[0068] Furthermore, the total current correction factor in the correction factor corresponding to the ambient temperature is obtained through the following steps:

[0069] Step 1: Obtain the reference current corresponding to at least two external high-precision reference current sources, and the total current sampling value of the output of the external high-precision reference power supply acquired at the ambient temperature.

[0070] In this application embodiment, the external high-precision reference current source is a power supply that provides a stable current output. The reference current refers to the known and stable current output by the external high-precision reference current source. The total current sampling value refers to the total current output by the external high-precision reference current source that is collected by the acquisition device. Different external high-precision reference current sources correspond to different reference currents.

[0071] Step 2: Substitute the reference current and total current sampling values ​​corresponding to all external high-precision reference current sources into the total current correction formula to obtain the total current correction coefficient under the ambient temperature of the sampling environment.

[0072] In this embodiment, external high-precision reference current sources are grouped according to the number of total current correction coefficients in the total current correction formula to obtain external high-precision reference current source groups. For each external high-precision reference current source group, the reference current and total current sampling values ​​corresponding to that external high-precision reference current source group are substituted into the total current correction formula to obtain the initial total current correction coefficient at the sampling ambient temperature. The target total current correction coefficient is calculated based on all initial total current correction coefficients.

[0073] The total current correction formula is used to characterize the relationship between the collected total current (which can refer to the total current sample value) and the actual total current (which can refer to the reference current). It can be a linear relationship or a non-linear relationship, depending on the actual situation.

[0074] Specifically, calculating the target total current correction factor based on all initial total current correction factors includes: determining the average value of all initial total current correction factors as the target total current correction factor; and performing a weighted summation of all initial total current correction factors to obtain the target total current correction factor.

[0075] S102. Correct the battery acquisition parameters according to the correction coefficient to obtain the true battery parameters of the electric vehicle.

[0076] In this embodiment of the application, the total voltage collected by the battery is corrected according to the total voltage correction factor to obtain the true total voltage of the battery of the electric vehicle; the total current collected by the battery is corrected according to the total current correction factor to obtain the true total current of the battery of the electric vehicle.

[0077] Specifically, correcting the total battery voltage collected based on the total voltage correction factor to obtain the true total battery voltage of the electric vehicle includes substituting the total voltage correction factor and the total battery voltage collected into the total voltage correction formula to obtain the true total battery voltage of the electric vehicle.

[0078] Here, taking the linear relationship between the collected total voltage (which can refer to the total voltage collected by the battery) and the actual total voltage (which can refer to the true total voltage of the battery) as an example, the total voltage correction coefficient includes the total voltage correction slope and the total voltage correction intercept; substituting the total voltage correction coefficient and the total voltage collected by the battery into the following total voltage correction formula, we can obtain the true total voltage of the electric vehicle's battery.

[0079] y1 = k1x1 + b1;

[0080] Where y1 is the actual total battery voltage, k1 is the total voltage correction slope, x1 is the total battery voltage collected, and b1 is the total voltage correction intercept.

[0081] Specifically, the total current collected by the battery is corrected according to the total current correction factor to obtain the true total current of the electric vehicle battery. This includes substituting the total current correction factor and the total current collected by the battery into the total current correction formula to obtain the true total current of the electric vehicle battery.

[0082] Here, taking the linear relationship between the collected total current (which can refer to the total current collected by the battery) and the actual total current (which can refer to the actual total current of the battery) as an example, the total current correction coefficient includes the total current correction slope and the total current correction intercept; by substituting the total current correction coefficient and the total current collected by the battery into the following total voltage correction formula, the actual total current of the electric vehicle battery is obtained.

[0083] y2 = k2x2 + b2;

[0084] Where y2 is the actual total battery current, k2 is the total current correction slope, x2 is the total battery current collected, and b2 is the total current correction intercept.

[0085] S103. Send the actual battery parameters to the battery management system.

[0086] In this embodiment, the actual battery parameters at the same time are simultaneously sent to the battery management system via a wired communication method.

[0087] Here, wireless communication is used with the battery management system to prevent the battery voltage level from continuously increasing, which could lead to high-voltage failure of the battery management system and damage to other control modules. A synchronizer synchronizes the battery's actual total current and voltage parameters before sending them to the battery management system. This synchronized sampling of the actual total current and voltage affects the accuracy of the remaining battery capacity calculation. The battery management system calculates the current remaining battery capacity and displays it to the user.

[0088] Reference Figure 2 The diagram shown is a flowchart illustrating another battery high-voltage monitoring method for electric vehicles provided in this application embodiment. The exemplary steps of this application embodiment are described below:

[0089] S201. Correct the total voltage collected by the battery according to the total voltage correction coefficient to obtain the true total voltage of the electric vehicle battery.

[0090] In this embodiment of the application, the total voltage correction coefficient and the total battery voltage are substituted into the total voltage correction formula to obtain the true total battery voltage of the electric vehicle.

[0091] Here, taking the linear relationship between the collected total voltage (which can refer to the total voltage collected by the battery) and the actual total voltage (which can refer to the true total voltage of the battery) as an example, the total voltage correction coefficient includes the total voltage correction slope and the total voltage correction intercept; substituting the total voltage correction coefficient and the total voltage collected by the battery into the following total voltage correction formula, we can obtain the true total voltage of the electric vehicle's battery.

[0092] y1 = k1x1 + b1;

[0093] Where y1 is the actual total battery voltage, k1 is the total voltage correction slope, x1 is the total battery voltage collected, and b1 is the total voltage correction intercept.

[0094] S202. Correct the total current collected by the battery according to the total current correction coefficient to obtain the true total current of the electric vehicle battery.

[0095] In this embodiment of the application, the total current correction factor and the total current collected by the battery are substituted into the total current correction formula to obtain the true total current of the electric vehicle's battery.

[0096] Here, taking the linear relationship between the collected total current (which can refer to the total current collected by the battery) and the actual total current (which can refer to the actual total current of the battery) as an example, the total current correction coefficient includes the total current correction slope and the total current correction intercept; by substituting the total current correction coefficient and the total current collected by the battery into the following total voltage correction formula, the actual total current of the electric vehicle battery is obtained.

[0097] y2 = k2x2 + b2;

[0098] Where y2 is the actual total battery current, k2 is the total current correction slope, x2 is the total battery current collected, and b2 is the total current correction intercept.

[0099] This application provides another method for monitoring the high voltage of an electric vehicle battery, which can eliminate the problem of inaccurate battery parameters collected due to temperature drift.

[0100] Based on the same inventive concept, this application also provides a battery high-voltage monitoring device for electric vehicles corresponding to the battery high-voltage monitoring method for electric vehicles. Since the principle of the device in this application is similar to the battery high-voltage monitoring method for electric vehicles described above, the implementation of the device can refer to the implementation of the method, and repeated details will not be elaborated further. This battery high-voltage monitoring device is powered independently by the battery's total voltage being stepped down by a DC-DC module. That is, there is no connecting medium between the battery high-voltage monitoring device and the battery management system, achieving high-voltage safety and preventing low-voltage side controller failure.

[0101] Reference Figure 3 The diagram shown is a schematic of a high-voltage battery monitoring device for an electric vehicle provided in an embodiment of this application. The high-voltage battery monitoring device for the electric vehicle includes:

[0102] The acquisition module 301 is used to acquire the battery acquisition parameters of the electric vehicle and the ambient temperature of the battery acquisition parameters, as well as the correction coefficient corresponding to the ambient temperature; different ambient temperatures correspond to different correction coefficients; the correction coefficient is used to describe the relationship between the battery acquisition parameters and the actual battery parameters.

[0103] The correction module 302 is used to correct the battery acquisition parameters according to the correction coefficient to obtain the true battery parameters of the electric vehicle.

[0104] The sending module 303 is used to send the actual battery parameters to the battery management system.

[0105] In one possible implementation, the battery acquisition parameters include the total battery acquisition voltage and the total battery acquisition current; the correction coefficients include the total voltage correction coefficient and the total current correction coefficient; the correction module 302 is specifically used to correct the total battery acquisition voltage according to the total voltage correction coefficient to obtain the true total battery voltage of the electric vehicle; and to correct the total battery acquisition current according to the total current correction coefficient to obtain the true total battery current of the electric vehicle.

[0106] In one possible implementation, the total voltage correction coefficient includes the total voltage correction slope and the total voltage correction intercept; the correction module 302 is specifically used to substitute the total voltage correction coefficient and the total battery voltage into the following total voltage correction formula to obtain the true total battery voltage of the electric vehicle.

[0107] y1 = k1x1 + b1;

[0108] Where y1 is the actual total battery voltage, k1 is the total voltage correction slope, x1 is the total battery voltage collected, and b1 is the total voltage correction intercept.

[0109] In one possible implementation, the total voltage correction factor includes the total current correction slope and the total current correction intercept; the correction module 302 is specifically used to substitute the total current correction factor and the total current collected by the battery into the following total current correction formula to obtain the true total current of the electric vehicle battery.

[0110] y2 = k2x2 + b2;

[0111] Where y2 is the actual total battery current, k2 is the total current correction slope, x2 is the total battery current collected, and b2 is the total current correction intercept.

[0112] In one possible implementation, the acquisition module 301 is specifically used to acquire the reference voltages corresponding to at least two external high-precision reference power supplies, and the total voltage sample value of the external high-precision reference power supply output acquired at the acquisition ambient temperature; and to substitute the reference voltages corresponding to all external high-precision reference power supplies and the total voltage sample value into the total voltage correction formula to obtain the total voltage correction coefficient at the acquisition ambient temperature.

[0113] In one possible implementation, the acquisition module 301 is specifically used to acquire the reference currents corresponding to at least two external high-precision reference current sources and the total current sampling value of the external high-precision reference power supply output acquired at the acquisition ambient temperature; and to substitute the reference currents corresponding to all external high-precision reference current sources and the total current sampling value into the total current correction formula to obtain the total current correction coefficient at the acquisition ambient temperature.

[0114] This application provides a high-voltage monitoring device for an electric vehicle battery. The device includes: an acquisition module 301, used to acquire battery acquisition parameters of the electric vehicle, the ambient temperature of the acquisition parameters, and a correction coefficient corresponding to the ambient temperature; different ambient temperatures correspond to different correction coefficients; the correction coefficients describe the relationship between the battery acquisition parameters and the actual battery parameters; a correction module 302, used to correct the battery acquisition parameters according to the correction coefficients to obtain the true battery parameters of the electric vehicle; and a sending module 303, used to send the true battery parameters to a battery management system. This application corrects the battery acquisition parameters using correction coefficients corresponding to the ambient temperature of the battery acquisition parameters, thereby obtaining more accurate battery parameters and improving the battery management performance of the battery management system.

[0115] like Figure 4 As shown in the embodiment of this application, an electronic device 400 includes a processor 401, a memory 402, and a bus. The memory 402 stores machine-readable instructions that can be executed by the processor 401. When the electronic device is running, the processor 401 communicates with the memory 402 through the bus. The processor 401 executes the machine-readable instructions to perform the steps of the battery high-voltage monitoring method for electric vehicles described above.

[0116] Specifically, the memory 402 and processor 401 mentioned above can be general-purpose memory and processor, without any specific limitations. When the processor 401 runs the computer program stored in the memory 402, it can execute the above-mentioned battery high voltage monitoring method for electric vehicles.

[0117] Corresponding to the above-described battery high-voltage monitoring method for electric vehicles, this application embodiment also provides a computer-readable storage medium storing a computer program, which, when run by a processor, executes the steps of the above-described battery high-voltage monitoring method for electric vehicles.

[0118] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems and devices described above can be referred to the corresponding processes in the method embodiments, and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some communication interfaces; the indirect coupling or communication connection of devices or modules can be electrical, mechanical, or other forms.

[0119] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0120] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0121] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the information processing methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0122] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for monitoring the high voltage of an electric vehicle battery, characterized in that, The method for monitoring the high voltage of the electric vehicle battery includes: The battery acquisition parameters of the electric vehicle and the ambient temperature at which the battery acquisition parameters are acquired are obtained, as well as the correction coefficient corresponding to the ambient temperature; different ambient temperatures correspond to different correction coefficients; the correction coefficient is used to describe the relationship between the battery acquisition parameters and the actual battery parameters. The battery acquisition parameters are corrected according to the correction coefficient to obtain the true battery parameters of the electric vehicle; Send the actual battery parameters to the battery management system; The total current correction coefficient corresponding to the ambient temperature is obtained through the following steps: acquiring the reference current corresponding to at least two external high-precision reference current sources, and the total current sampling value of the external high-precision reference power supply output acquired at the ambient temperature; grouping the external high-precision reference current sources according to the number of total current correction coefficients in the total current correction formula to obtain external high-precision reference current source groups; for each external high-precision reference current source group, substituting the reference current and total current sampling value corresponding to the external high-precision reference current source group into the total current correction formula to obtain the initial total current correction coefficient at the ambient temperature; calculating the target total current correction coefficient based on all initial total current correction coefficients; the total current correction formula is used to characterize the relationship between the acquired total current and the actual total current; the total current correction coefficient is used to correct the value of the battery-acquired total current.

2. The method for monitoring the high voltage of an electric vehicle battery according to claim 1, characterized in that, The battery acquisition parameters include the total battery voltage and the total battery current; the correction coefficients include the total voltage correction coefficient and the total current correction coefficient. The step of correcting the battery-collected parameters according to the correction coefficient to obtain the true battery parameters of the electric vehicle includes: The total voltage collected by the battery is corrected according to the total voltage correction coefficient to obtain the true total voltage of the battery of the electric vehicle; The total current collected by the battery is corrected according to the total current correction coefficient to obtain the true total current of the electric vehicle's battery.

3. The method for monitoring the high voltage of an electric vehicle battery according to claim 2, characterized in that, The total voltage correction factor includes the total voltage correction slope and the total voltage correction intercept; The step of correcting the total voltage collected by the battery according to the total voltage correction coefficient to obtain the true total battery voltage of the electric vehicle includes: Substituting the total voltage correction coefficient and the total battery voltage collected into the following total voltage correction formula, the true total battery voltage of the electric vehicle is obtained; ； in, This represents the actual total battery voltage. The slope is the total voltage correction. Collect the total voltage of the battery. This is the corrected intercept for the total voltage.

4. The method for monitoring the high voltage of an electric vehicle battery according to claim 3, characterized in that, The total current correction factor includes the total current correction slope and the total current correction intercept; The step of correcting the total current collected by the battery according to the total current correction coefficient to obtain the true total current of the electric vehicle's battery includes: Substituting the total current correction coefficient and the total current collected by the battery into the following total current correction formula, the true total current of the electric vehicle's battery is obtained; ； in, This represents the actual total current of the battery. The slope is corrected for the total current. To collect the total current of the battery, Corrected intercept for total current.

5. The method for monitoring the high voltage of an electric vehicle battery according to claim 3, characterized in that, The correction coefficient corresponding to the collected ambient temperature is obtained through the following steps: Acquire the reference voltages corresponding to at least two external high-precision reference power supplies, and the total voltage sample value of the output of the external high-precision reference power supplies acquired at the acquisition ambient temperature; Substitute the reference voltages corresponding to all external high-precision reference power supplies and the total voltage sample value into the total voltage correction formula to obtain the total voltage correction coefficient under the sampling ambient temperature.

6. A high-voltage monitoring device for an electric vehicle battery, characterized in that, The device includes: The acquisition module is used to acquire the battery acquisition parameters of the electric vehicle and the ambient temperature of the acquisition parameters, as well as the correction coefficient corresponding to the ambient temperature; different ambient temperatures correspond to different correction coefficients; the correction coefficient is used to describe the relationship between the battery acquisition parameters and the actual battery parameters. The correction module is used to correct the battery acquisition parameters according to the correction coefficient to obtain the true battery parameters of the electric vehicle. A sending module is used to send the actual parameters of the battery to the battery management system. Specifically, the acquisition module is used to obtain the total current correction coefficient in the correction coefficient corresponding to the acquisition ambient temperature through the following steps: acquiring the reference current corresponding to at least two external high-precision reference current sources, and the total current sampling value of the output of the external high-precision reference power supply acquired at the acquisition ambient temperature; grouping the external high-precision reference current sources according to the number of total current correction coefficients in the total current correction formula to obtain external high-precision reference current source groups; for each external high-precision reference current source group, substituting the reference current and total current sampling value corresponding to the external high-precision reference current source group into the total current correction formula to obtain the initial total current correction coefficient at the acquisition ambient temperature; calculating the target total current correction coefficient based on all initial total current correction coefficients; the total current correction formula is used to characterize the relationship between the acquired total current and the actual total current; the total current correction coefficient is used to correct the value of the battery-acquired total current.

7. The battery high-voltage monitoring device for electric vehicles according to claim 6, characterized in that, The battery acquisition parameters include the total battery voltage and the total battery current; the correction coefficients include a total voltage correction coefficient and a total current correction coefficient; the correction module is specifically used for: The total voltage collected by the battery is corrected according to the total voltage correction coefficient to obtain the true total voltage of the battery of the electric vehicle; The total current collected by the battery is corrected according to the total current correction coefficient to obtain the true total current of the electric vehicle's battery.

8. An electronic device, characterized in that, include: The device includes a processor, a storage medium, and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor communicates with the storage medium via the bus, and the processor executes the machine-readable instructions to perform the steps of the battery high-voltage monitoring method for an electric vehicle as described in any one of claims 1 to 5.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the battery high-voltage monitoring method for an electric vehicle as described in any one of claims 1 to 5.

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