Method and device for monitoring quiescent current of whole vehicle

Abstract

A vehicle quiescent current monitoring method and device relates to the technical field of vehicles, and the method comprises the steps: obtaining a vehicle quiescent current value in a plurality of preset timing cycles, when any timing cycle ends, if the vehicle quiescent current value is higher than a preset quiescent current threshold, adding 1 to an abnormal count, and if the abnormal count is greater than or equal to a preset abnormal count threshold, adding 1 to the abnormal count; an abnormal controller is positioned, and the vehicle placement duration is calculated according to the storage battery parameters and the whole vehicle static current value; and judging whether the vehicle placement duration is lower than a preset placement duration threshold value or not, if so, cutting off a power supply of an abnormal controller, and if not, entering a next timing period. The power supply is cut off when the vehicle placement duration is lower than the preset placement duration threshold, and the power supply is not cut off according to the whole vehicle quiescent current abnormity appearing at a single time, so that the quiescent current abnormity judgment accuracy is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method and device for monitoring static current of a whole vehicle. Background Art

[0002] The static current of the vehicle is an important parameter to measure the electrical performance of the vehicle. During normal use of the vehicle, if the static current of the vehicle is abnormal after power is turned off and continues to exceed the design limit, it will not only cause the vehicle to lose power and be unable to start the vehicle, but also affect the service life of the battery.

[0003] In the related art, the static current of the vehicle controller is collected within a fixed time period, the collected current value is compared with the preset current value, and abnormal information is generated and sent to the server to detect whether the static current of the entire vehicle is abnormal.

[0004] However, if the static current of the whole vehicle fluctuates in a short period of time, the existing static current monitoring method of the whole vehicle will produce a false alarm and cut off the power supply when the battery is fully charged, thereby reducing the accuracy of the abnormal judgment of the static current of the whole vehicle and affecting the normal use of the vehicle. Summary of the invention

[0005] The present application provides a method and device for monitoring static current of a whole vehicle, which can improve the accuracy of abnormal judgment of static current of the whole vehicle.

[0006] In a first aspect, an embodiment of the present application provides a method for monitoring static current of a vehicle, the method comprising:

[0007] Obtain the static current value of the whole vehicle within a plurality of preset timing cycles;

[0008] When any timing cycle ends, if the static current value of the whole vehicle is higher than the preset static current threshold, the abnormality count is increased by 1. If the abnormality count is greater than or equal to the preset abnormality count threshold, the abnormal controller is located, and the vehicle can be placed for a long time according to the battery parameters and the static current value of the whole vehicle;

[0009] Determine whether the vehicle can be parked for a period of time lower than a preset parking period threshold. If so, cut off the power supply of the abnormal controller. If not, enter the next timing cycle.

[0010] In combination with the first aspect, in one implementation, before the method is started, it further includes:

[0011] When the vehicle is powered off, the abnormal count is set to 0 and the current timing cycle is reset.

[0012] In combination with the first aspect, in one implementation, obtaining the static current value of the entire vehicle includes:

[0013] The static current value of the whole vehicle is obtained according to the current signal of the vehicle battery output terminal.

[0014] In combination with the first aspect, in one implementation, the abnormal positioning controller includes:

[0015] Monitor the static current of each vehicle controller and locate the abnormal controller through CAN message data.

[0016] In combination with the first aspect, in one implementation, locating the abnormal controller through CAN message data includes:

[0017] Collect CAN message data sent by each controller;

[0018] Compare the preset CAN message data with the CAN message data sent by each controller. If the two are inconsistent, the controller is an abnormal controller.

[0019] In combination with the first aspect, in one implementation, the calculating the vehicle storage time according to the battery parameters and the vehicle static current value includes:

[0020] The vehicle storage time is calculated based on the rated capacity of the battery, the upper limit SOC value of the battery, the lower limit SOC value of the battery, the daily self-discharge SOC value of the battery, the power consumption when the vehicle is powered off for the first time, and the static current value of the whole vehicle.

[0021] In combination with the first aspect, in one implementation, after cutting off the power supply of the abnormal controller, the method further includes:

[0022] Collecting abnormal static current data of the whole vehicle and abnormal static current data of the controller;

[0023] T-BOX uploads the abnormal static current data of the whole vehicle, the abnormal static current data of the controller, and the vehicle's available storage time to a preset background server.

[0024] In combination with the first aspect, in one embodiment, after uploading the abnormal static current data of the whole vehicle, the abnormal controller static current data, and the vehicle placement time to a preset background server, it also includes:

[0025] Generate an abnormal fault code according to the abnormal static current data of the whole vehicle, the abnormal static current data of the controller, and the vehicle placement time;

[0026] The T-BOX stores the abnormal fault code.

[0027] In combination with the first aspect, in one implementation, after the T-BOX stores the abnormal fault code, it further includes:

[0028] Generate abnormal state information according to the abnormal fault code, abnormal static current data of the whole vehicle, abnormal static current data of the controller, and the vehicle placement time;

[0029] The preset backend server sends the abnormal status information to the application on the user's mobile phone.

[0030] In a second aspect, an embodiment of the present application provides a vehicle static current monitoring device based on any one of the above methods, the device comprising:

[0031] The acquisition module is used to obtain the static current value of the whole vehicle within a plurality of preset timing cycles;

[0032] An analysis module, for, when any timing cycle ends, if the static current value of the whole vehicle is higher than a preset static current threshold, increasing the abnormality count by 1, locating the abnormality controller if the abnormality count is greater than or equal to the preset abnormality count threshold, and calculating the vehicle storage time according to the battery parameters and the static current value of the whole vehicle;

[0033] The execution module is used to determine whether the vehicle can be placed for a period of time less than a preset placement time threshold. If so, the power supply of the abnormal controller is cut off; if not, the next timing cycle is entered.

[0034] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0035] The present application counts abnormalities in the timing cycles in which the static current value of the whole vehicle is higher than the preset static current threshold. When any timing cycle ends, if the abnormality count is greater than or equal to the preset abnormality count threshold, the abnormal controller is located, and the vehicle can be placed for a long time according to the battery parameters and the static current value of the whole vehicle. The accuracy of the static current abnormality judgment is improved by cutting off the power supply when the vehicle can be placed for a long time is lower than the preset placement time threshold, rather than cutting off the power supply based on a single occurrence of the static current abnormality of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a flow chart of the first embodiment of the vehicle static current monitoring method of the present application;

[0037] Figure 2 This is a schematic diagram of the structure of the vehicle static current monitoring device of this application. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] First, some technical terms in the present application are explained to facilitate those skilled in the art to understand the present application.

[0040] CAN (Controller Area Network): A serial communication protocol bus for real-time applications. The CAN protocol is used for communication between various components in the car, replacing expensive and bulky distribution wiring harnesses. The robustness of the protocol has extended its use to other automation and industrial applications. Features of the CAN protocol include complete serial data communication, real-time support, transmission rates up to 1Mb / s, 11-bit addressing, and error detection.

[0041] SOC (state of charge): The state of charge is the ratio of the remaining capacity of a battery after it has been used for a period of time or has been left unused for a long time to its capacity in a fully charged state, usually expressed as a percentage. Its value range is 0 to 1. When SOC = 0, it means that the battery is fully discharged, and when SOC = 1, it means that the battery is fully charged.

[0042] T-BOX (Telematics Box): As a core component of the Internet of Vehicles system, T-BOX realizes the wireless router function between the multimedia vehicle machine and TSP (Telematics Service Provider) and the Internet, allowing users to remotely access and control the vehicle.

[0043] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0044] In a first aspect, an embodiment of the present application provides a method for monitoring static current of a vehicle.

[0045] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the vehicle static current monitoring method of this application. Figure 1 As shown, the method comprises the following steps:

[0046] Step S1: obtaining the static current value of the whole vehicle within a plurality of preset timing cycles.

[0047] Step S2: When any timing cycle ends, determine whether the static current value of the vehicle is higher than the preset static current threshold. If yes, proceed to step S3; if not, return to step S1.

[0048] Step S3: The abnormality count is increased by 1.

[0049] Step S4: Determine whether the abnormality count is greater than or equal to a preset abnormality count threshold. If so, proceed to step S5; if not, return to step S1.

[0050] Step S5: Locate the abnormal controller and calculate the vehicle storage time based on the battery parameters and the static current value of the vehicle.

[0051] Step S6: Determine whether the available parking time of the vehicle is less than the preset parking time threshold. If yes, proceed to step S7; if not, return to step S1.

[0052] Step S7: Cut off the power supply of the abnormal controller.

[0053] It should be noted that this method monitors the static current of the entire vehicle within a preset timing period. When it is identified that the number of times the static current value of the entire vehicle exceeds the preset static current threshold value reaches a maximum value within multiple timing periods, it is determined that the static current of the entire vehicle is abnormal, and then the abnormal controller is located, and the vehicle can be placed for a certain period of time based on the battery parameters and the static current value of the entire vehicle.

[0054] This method will trigger the power cut-off mechanism only when the vehicle can be parked for less than the preset safe parking time threshold. Compared with the traditional approach of cutting off the power supply based on a single static current abnormality, this strategy significantly improves the accuracy of abnormality judgment, reduces the possibility of misoperation, and ensures the reasonable use of the battery and the normal operation of the vehicle.

[0055] In some embodiments, before the above step S1, the above vehicle static current monitoring method further includes the following steps:

[0056] When the vehicle is powered off, the above abnormal count is set to 0 and the current timing cycle is reset.

[0057] In some embodiments, in the above step S1, the above step of obtaining the static current value of the whole vehicle includes the following steps:

[0058] The static current value of the whole vehicle is obtained according to the current signal of the vehicle battery output terminal.

[0059] In some embodiments, in the above step S5, the above locating the abnormal controller includes the following steps:

[0060] Monitor the static current of each vehicle controller and locate the abnormal controller through CAN message data.

[0061] It should be noted that the above-mentioned abnormal controller refers to a controller unit that is identified as having abnormal static current during the monitoring process.

[0062] When the quiescent current value of the entire vehicle exceeds the preset quiescent current threshold, it may be related to the abnormal current consumption of a single controller. For example, an internal circuit failure or software error in a controller may cause it to remain active continuously, thereby increasing unnecessary current consumption. It is also possible that multiple controllers may have quiescent current abnormalities simultaneously or successively. These abnormalities may be independent of each other or may be related to each other, jointly increasing the quiescent current value of the entire vehicle.

[0063] In some embodiments, the above-mentioned method of locating the abnormal controller through CAN message data includes the following steps:

[0064] First, collect the CAN message data sent by each controller, and compare the preset CAN message data with the CAN message data sent by each controller. If the two are inconsistent, the controller is an abnormal controller.

[0065] It should be noted that when it is determined that the preset CAN message data of a controller is inconsistent with the actually sent CAN message data, the controller is determined to be an abnormal controller.

[0066] After that, this method locates the abnormal controller through the ID of the CAN message. The CAN message ID is an important field used to distinguish different messages in CAN bus communication. Each controller will be accompanied by a unique ID when sending a CAN message, so that other nodes can identify and process it. Therefore, by capturing and parsing the ID information in the CAN message sent by the abnormal controller, the specific location of the controller can be quickly found in the vehicle electrical system.

[0067] This method improves the accuracy and efficiency of analyzing and solving abnormal static current faults of the whole vehicle by locating the controller that causes the abnormal static current of the whole vehicle.

[0068] In some embodiments, in the above step S5, the vehicle storage time is calculated according to the battery parameters and the static current value of the vehicle, including the following steps:

[0069] The vehicle's storage time is calculated based on the battery's rated capacity, the battery's upper SOC value, the battery's lower SOC value, the battery's daily self-discharge SOC value, the vehicle's power consumption when it is first powered off, and the above-mentioned vehicle's static current value.

[0070] In this embodiment, the calculation method of the vehicle storage time is as follows:

[0071] Vehicle storage time = (C20*(C1-C2)-Cd) / (C20*C3+IQ*24 / 1000)(1)

[0072] In formula (1), IQ is the static current of the vehicle at the current moment, C20, C1, C2, C3, and Cd are all inherent parameters of the battery, where C20 is the rated capacity of the battery, C1 is the upper limit SOC value of the battery, C2 is the lower limit SOC value of the battery, C3 is the daily self-discharge SOC value of the battery, and Cd is the power consumption when the vehicle is powered off for the first time.

[0073] This formula is based on the principle that when the battery capacity is fixed, the smaller the static current of the vehicle, the longer the vehicle can be placed. It calculates the time the vehicle can be placed in this state through the inherent parameters of the battery and the power consumption when the vehicle is powered off for the first time.

[0074] When the vehicle's available storage time is lower than the preset storage time threshold, it indicates that the battery is at risk of exhaustion, which may lead to serious consequences such as the vehicle being unable to start. At this time, this method will cut off the power supply of the controller that is determined to be abnormal to reduce unnecessary power consumption and protect the battery from damage caused by excessive discharge, thereby ensuring that the vehicle can remain in the starting state at any time, improving the user experience and enhancing the safety and reliability of vehicle use.

[0075] In some embodiments, after the above step S7, the above vehicle static current monitoring method further includes the following steps:

[0076] First, collect abnormal static current data of the whole vehicle and abnormal controller static current data.

[0077] Afterwards, T-BOX uploads the abnormal static current data of the whole vehicle, the abnormal controller static current data, and the vehicle's available storage time to the preset background server.

[0078] Specifically, T-BOX uploads abnormal static current data of the vehicle, abnormal controller static current data, and the vehicle's available storage time to the preset backend server through 4G signals. These data are not only related to the life and endurance of the vehicle battery, but also directly affect the user's daily car experience. By real-time monitoring and uploading of these data, vehicle manufacturers can obtain real vehicle usage status information and improve product quality.

[0079] In some embodiments, after uploading the abnormal static current data of the whole vehicle, the abnormal controller static current data, and the vehicle parking time to the preset background server, the following steps are also included:

[0080] First, an abnormal fault code is generated based on the abnormal static current data of the whole vehicle, the abnormal controller static current data, and the vehicle's parking time, and then the T-BOX stores the abnormal fault code.

[0081] In some embodiments, after the T-BOX stores the abnormal fault code, it further includes the following steps:

[0082] First, abnormal status information is generated based on the above abnormal fault code, abnormal static current data of the whole vehicle, abnormal static current data of the controller, and the above vehicle placement time.

[0083] Afterwards, the preset backend server sends the above abnormal status information to the application on the user's mobile phone.

[0084] It should be noted that by sending abnormal status information, users can be reminded to maintain their vehicles in a timely manner, which is especially important and effective for users who do not use their vehicles frequently.

[0085] In a second aspect, an embodiment of the present application provides a vehicle static current monitoring device, which includes a collection module, an analysis module and an execution module.

[0086] The acquisition module is used to obtain the static current value of the whole vehicle within a plurality of preset timing cycles.

[0087] The analysis module is used to locate the abnormal controller if the static current value of the vehicle is higher than the preset static current threshold at the end of any timing cycle. The abnormal count is increased by 1 if the abnormal count is greater than or equal to the preset abnormal count threshold, and the vehicle can be placed for a long time based on the battery parameters and the static current value of the vehicle.

[0088] The execution module is used to determine whether the vehicle can be parked for less than a preset parking time threshold. If so, the power supply of the abnormal controller is cut off; if not, the next timing cycle is entered.

[0089] It should be noted that the acquisition module can continuously obtain the static current value of the vehicle within multiple preset timing cycles. This monitoring method ensures the accuracy and timeliness of the data and provides a reliable basis for subsequent analysis.

[0090] By comparing the static current value of the vehicle with the preset static current threshold, the analysis module can effectively filter out occasional fluctuations through the accumulation mechanism of abnormal counts. When the abnormal count reaches a certain level, it automatically triggers the positioning process of the abnormal controller and calculates the vehicle's available placement time.

[0091] The execution module determines whether to cut off the power supply of the abnormal controller by judging whether the vehicle can be parked for a long time or not, and then decides whether to cut off the power supply of the abnormal controller. This automatic protection mechanism effectively prevents the battery from over-discharging due to long-term power supply to the abnormal controller, protects the battery life, and also ensures the normal starting ability of the vehicle.

[0092] In one embodiment, referring to Figure 2 , Figure 2 This is a schematic diagram of the structure of the vehicle static current monitoring device of this application. Figure 2 As shown, the device includes the following modules:

[0093] The acquisition module includes a vehicle static current acquisition module and an abnormal controller static current acquisition module. The vehicle static current acquisition module is used to obtain the static current value of the vehicle according to the current signal at the output end of the vehicle battery, and the abnormal controller static current acquisition module is used to collect the static current values ​​of each vehicle controller.

[0094] The analysis module is used to increase the abnormality count by 1 when any timing cycle ends, if the static current value of the vehicle is higher than the preset static current threshold, locate the abnormal controller if the abnormality count is greater than or equal to the preset abnormality count threshold, and calculate the vehicle's storage time based on the battery parameters and the static current value of the vehicle. The analysis module exchanges data with the acquisition module through the CAN bus.

[0095] The execution module is used to determine whether the vehicle can be parked for less than the preset parking time threshold. If so, the power supply of the abnormal controller is cut off. If not, the next timing cycle is entered. The execution module exchanges data with the acquisition module through the CAN bus.

[0096] The warning module is used to upload abnormal static current data of the vehicle, abnormal controller static current data, and the vehicle's parking time to the preset background server through T-BOX. The background server generates abnormal status information based on the received data and sends it to the application on the user's mobile phone. The internal data interaction of this module is carried out using 4G signals.

[0097] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0098] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0099] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0100] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0101] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0102] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0103] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A vehicle static current monitoring method, characterized in that: The vehicle static current monitoring method comprises: Obtain the static current value of the whole vehicle within a plurality of preset timing cycles; When any timing cycle ends, if the static current value of the whole vehicle is higher than the preset static current threshold, the abnormality count is increased by 1. If the abnormality count is greater than or equal to the preset abnormality count threshold, the abnormal controller is located, and the vehicle can be placed for a long time according to the battery parameters and the static current value of the whole vehicle; Determine whether the vehicle can be parked for a period of time lower than a preset parking period threshold. If so, cut off the power supply of the abnormal controller. If not, enter the next timing cycle.

2. The vehicle static current monitoring method according to claim 1, characterized in that: Before the method is started, it also includes: When the vehicle is powered off, the abnormal count is set to 0 and the current timing cycle is reset.

3. The vehicle static current monitoring method according to claim 1, characterized in that: The obtaining of the static current value of the whole vehicle includes: The static current value of the whole vehicle is obtained according to the current signal of the vehicle battery output terminal.

4. The vehicle static current monitoring method according to claim 1, characterized in that: The abnormal positioning controller includes: Monitor the static current of each vehicle controller and locate the abnormal controller through CAN message data.

5. The vehicle static current monitoring method according to claim 4, characterized in that: The method of locating the abnormal controller through CAN message data includes: Collect CAN message data sent by each controller; Compare the preset CAN message data with the CAN message data sent by each controller. If the two are inconsistent, the controller is an abnormal controller.

6. The vehicle static current monitoring method according to claim 1, characterized in that: The calculating the vehicle storage time according to the battery parameters and the vehicle static current value includes: The vehicle storage time is calculated based on the rated capacity of the battery, the upper limit SOC value of the battery, the lower limit SOC value of the battery, the daily self-discharge SOC value of the battery, the power consumption when the vehicle is powered off for the first time, and the static current value of the whole vehicle.

7. The vehicle static current monitoring method according to claim 1, characterized in that: After cutting off the power supply of the abnormal controller, the method further includes: Collecting abnormal static current data of the whole vehicle and abnormal static current data of the controller; T-BOX uploads the abnormal static current data of the whole vehicle, the abnormal static current data of the controller, and the vehicle's available storage time to a preset background server.

8. The vehicle static current monitoring method according to claim 7, characterized in that: After uploading the abnormal static current data of the whole vehicle, the abnormal controller static current data, and the vehicle placement time to a preset backend server, the method further includes: Generate an abnormal fault code according to the abnormal static current data of the whole vehicle, the abnormal static current data of the controller, and the vehicle placement time; The T-BOX stores the abnormal fault code.

9. The vehicle static current monitoring method according to claim 8, characterized in that: After the T-BOX stores the abnormal fault code, it also includes: Generate abnormal state information according to the abnormal fault code, abnormal static current data of the whole vehicle, abnormal static current data of the controller, and the vehicle placement time; The preset backend server sends the abnormal status information to the application on the user's mobile phone.

10. A vehicle static current monitoring device based on the method according to any one of claims 1 to 9, characterized in that: The device comprises: The acquisition module is used to obtain the static current value of the whole vehicle within a plurality of preset timing cycles; An analysis module, for, when any timing cycle ends, if the static current value of the whole vehicle is higher than a preset static current threshold, increasing the abnormality count by 1, locating the abnormality controller if the abnormality count is greater than or equal to the preset abnormality count threshold, and calculating the vehicle storage time according to the battery parameters and the static current value of the whole vehicle; The execution module is used to determine whether the vehicle can be placed for a period of time less than a preset placement time threshold. If so, the power supply of the abnormal controller is cut off; if not, the next timing cycle is entered.

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