Vehicle low-voltage power grid abnormality processing method, device, vehicle and computer-readable storage medium

Abstract

The present invention provides a method, device, electronic device and computer-readable storage medium for handling abnormalities in a vehicle low-voltage power grid, the method comprising: detecting the changes in the current and voltage of a battery within a preset period; determining the abnormal state of the power supply component of the vehicle low-voltage power grid according to the changes in the current and voltage, wherein the abnormal state of the power supply component comprises: abnormality of the battery and abnormality of the main power supply device; according to the abnormal state of the power supply component, switching the power supply currently relied on by the vehicle low-voltage power grid. The method of the present invention can determine whether the overall circuit of the vehicle low-voltage power grid is normal by detecting the changes in the current and voltage of the battery, and judge the battery status and the main power supply device status, so as to achieve comprehensive judgment of abnormalities in the vehicle low-voltage power grid.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of automobile engineering technology, and in particular to a method and device for handling abnormalities in a vehicle low-voltage power grid, and a vehicle computer-readable storage medium. Background Art

[0002] When a car is driving, the 12V low-voltage grid serves as the power source for the entire vehicle and provides energy for various electrical components. Its safety is an important part of the safety of the entire vehicle. Therefore, timely detection of low-voltage grid anomalies and handling of the anomalies is an urgent problem to be solved.

[0003] In existing solutions, abnormality detection is usually performed on the generator or DCDC DC-DC converter. When the generator or DCDC is detected to be abnormal, it is determined that the vehicle has a low-voltage power grid fault, and some fault lights appear on the vehicle instrument to prompt. However, this detection solution relies on the status judgment of the generator / DCDC itself, and does not actually detect and handle abnormalities of the entire low-voltage power grid. In the existing solution, there is a lack of judgment on the power circuit and battery status, and it is impossible to achieve comprehensive low-voltage power grid abnormality detection. Accordingly, it is impossible to handle abnormal situations in a timely manner.

[0004] Therefore, there is an urgent need for a method that can comprehensively detect and process low-voltage power grid anomalies. Summary of the invention

[0005] The present invention provides a vehicle low-voltage power grid abnormality processing method, device, electronic equipment and computer-readable storage medium to solve the problem of how to achieve comprehensive low-voltage power grid abnormality detection and timely handle the abnormal state of the low-voltage power grid.

[0006] In order to solve the above problems, in a first aspect, an embodiment of the present invention provides a method for handling abnormalities in a vehicle low-voltage power grid, the method comprising:

[0007] Detecting changes in current and voltage of the battery within a preset period of time;

[0008] Determine the abnormal state of the power supply component of the vehicle low-voltage power grid according to the changes in the current and voltage, wherein the abnormal state of the power supply component includes: abnormal battery and abnormal main power supply equipment;

[0009] According to the abnormal state of the power supply component, the power supply currently relied upon by the vehicle low-voltage power grid is switched.

[0010] Optionally, determining the abnormal state of the power supply component of the vehicle low-voltage power grid according to the changes in the current and voltage includes:

[0011] If it is detected that the current of the battery is less than the first preset threshold value and the voltage is unchanged within the preset time period, it is determined that the abnormal state of the power supply component is a battery abnormality;

[0012] If it is detected that the current of the battery is less than the second preset threshold and the voltage continues to drop within the preset time period, it is determined that the abnormal state of the power supply component is an abnormality of the main power supply device.

[0013] Optionally, the battery abnormality includes: battery connection abnormality, battery charging abnormality;

[0014] If it is detected that the current of the battery is a preset value and the voltage is unchanged within a preset time period, determining that the abnormal state of the battery is abnormal battery connection;

[0015] If it is detected that the charging current of the battery is continuously less than the third preset threshold value and the battery power is less than the fourth preset threshold value within the preset time period, it is determined that the abnormal state of the battery is abnormal battery charging.

[0016] Optionally, according to the abnormal situation, switching the power source on which the vehicle low-voltage power grid depends includes:

[0017] When the abnormal condition is a condition indicating an abnormality of the battery, using the main power supply device as the power source for the low-voltage power grid of the vehicle, and displaying a first prompt message to the user;

[0018] When the abnormal situation is a situation indicating an abnormality in the main power supply equipment, a storage battery is used as a power source for the vehicle low-voltage power grid, and a second prompt message is displayed to the user.

[0019] Optionally, when a storage battery is used as a power source for the vehicle low-voltage power grid, the method further comprises:

[0020] Detecting changes in current and voltage of the battery within a preset period of time;

[0021] Determining a discharge state of the battery according to changes in the current and voltage of the battery and a preset threshold;

[0022] When it is detected that the discharge state of the storage battery is an abnormal state, a third prompt message is displayed to the user.

[0023] Optionally, the abnormal state of the battery discharge state includes: the battery remaining capacity is less than a preset remaining capacity or the battery discharge is abnormal; and determining the battery discharge state according to the change in the current and voltage of the battery and a preset threshold value includes:

[0024] Determine whether the remaining battery power is less than a preset remaining power based on the current battery power and the estimated vehicle power consumption;

[0025] Whether the battery discharge is normal is determined based on the battery discharge current and the battery voltage. If the battery discharge current is continuously less than the fifth preset threshold value, and the voltage is less than the sixth preset threshold value, it is determined that the battery discharge is abnormal.

[0026] Optionally, displaying third prompt information to the user according to the battery status includes:

[0027] If the battery level is low, a fourth prompt message is displayed to the user, and the use of preset electrical devices on the vehicle is restricted;

[0028] If the battery discharge is abnormal, the fifth prompt message is displayed to the user.

[0029] In a second aspect, an embodiment of the present invention provides a vehicle low-voltage power grid abnormality processing device, the device comprising:

[0030] A detection module, used to detect changes in current and voltage of the battery within a preset period of time;

[0031] A determination module, used to determine the abnormal state of the power supply component of the vehicle low-voltage power grid according to the changes in the current and voltage, wherein the abnormal state of the power supply component includes: abnormal battery and abnormal main power supply equipment;

[0032] The switching module is used to switch the power supply currently used by the vehicle low-voltage power grid according to the abnormal state of the power supply component.

[0033] In a third aspect, an embodiment of the present invention further provides a vehicle, comprising a power supply controller, characterized in that the power supply controller implements the vehicle low-voltage power grid abnormality processing method proposed in an embodiment of the present application.

[0034] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the steps of the vehicle low-voltage power grid abnormality processing method proposed in an embodiment of the present invention.

[0035] The vehicle low-voltage power grid abnormality processing method provided by the present invention can determine whether the overall circuit of the vehicle low-voltage power grid is normal by detecting the current and voltage changes of the battery, and judge the battery status and the main power supply equipment status, so as to achieve a comprehensive judgment of the vehicle low-voltage power grid abnormality. By detecting the changes in the current and voltage of the battery within a preset time period, the battery abnormality and the main power supply equipment abnormality of the power supply components of the vehicle low-voltage power grid can be determined, so as to more comprehensively detect the abnormalities of the vehicle low-voltage power grid, and handle them in time, so as to improve the safety of the vehicle low-voltage power grid and the safety of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1 This is a schematic diagram of a low-voltage power grid structure of a vehicle provided by an embodiment of the present invention;

[0038] Figure 2 It is a flow chart of a method for handling abnormality of a vehicle low-voltage power grid provided by an embodiment of the present invention;

[0039] Figure 3 It is a flow chart of a method for handling abnormality of a vehicle low-voltage power grid provided by an embodiment of the present invention;

[0040] Figure 4 It is a structural schematic diagram of a vehicle low-voltage power grid abnormality processing device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] 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 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.

[0042] See also Figure 1 , shows a schematic diagram of the low-voltage power grid structure of a vehicle according to an embodiment of the present invention, wherein the solid line is the power line and the dotted line is the signal line.

[0043] In the embodiment of the present invention, the DC-DC converter DCDC and / or the generator can be connected to the battery and charge the battery. The battery sensor EBS is connected to the battery, detects the current and voltage of the battery, and transmits the detected current and voltage of the battery to the vehicle low-voltage power grid control module PNG. Thus, PNG can judge the abnormality of the vehicle low-voltage power grid based on the received signal.

[0044] A flow chart of a vehicle low-voltage power grid abnormality processing method proposed in an embodiment of the present invention is applied to a vehicle low-voltage power grid control module PNG, such as Figure 2 The vehicle low-voltage power grid abnormality processing method comprises:

[0045] Step S110, detecting changes in the current and voltage of the battery within a preset period of time.

[0046] In this embodiment, the battery sensor EBS can be used to detect the current and voltage of the battery in real time, and the detection result is sent to the vehicle low-voltage power grid control module PNG, so as to determine the change amount of the current and voltage of the battery within a preset time period. The preset time period can be preset in advance by a technician, for example, it can be 5 minutes, and the present invention does not impose any special restrictions on this.

[0047] Step S120, determining the abnormal state of the power supply component of the vehicle low-voltage power grid according to the changes in the current and voltage, wherein the abnormal state of the power supply component includes: battery abnormality and main power supply equipment abnormality.

[0048] In this embodiment, after determining the changes in the current and voltage of the battery within a preset time period, the abnormal state of the power supply component of the vehicle low-voltage power grid can be determined according to the changes in the current and voltage. In this embodiment, the abnormal state of the power supply component includes: abnormal battery and abnormal main power supply equipment.

[0049] In this embodiment, for a traditional fuel-powered vehicle, the main power supply device refers to a generator, for a pure electric vehicle, the main power supply device refers to a DC-DC converter DCDC, and for a hybrid vehicle, the main power supply device refers to a generator and a DC-DC converter DCDC.

[0050] Step S130: switching the power supply currently used by the vehicle low-voltage power grid according to the abnormal state of the power supply component.

[0051] In this embodiment, when an abnormality of the storage battery is detected, the main power supply device is used as the power supply, and corresponding prompt information is displayed to the user. When an abnormality of the main power supply device is detected, the storage battery is used as the power supply, and corresponding prompt information is displayed to the user.

[0052] In this embodiment, the prompt information can be displayed to the user in any manner in the prior art, for example, displaying on the vehicle dashboard, or making a voice announcement, or sending the prompt information to the user's mobile phone terminal, etc. This application does not impose any special restrictions on this.

[0053] The vehicle low-voltage power grid abnormality processing method provided by the present invention can determine whether the overall circuit of the vehicle low-voltage power grid is normal by detecting the current and voltage changes of the battery, and judge the battery status and the main power supply equipment status, so as to achieve a comprehensive judgment of the vehicle low-voltage power grid abnormality. By detecting the changes in the current and voltage of the battery within a preset time period, the battery abnormality and the main power supply equipment abnormality of the power supply components of the vehicle low-voltage power grid can be determined, so as to more comprehensively detect the abnormalities of the vehicle low-voltage power grid, and handle them in time, so as to improve the safety of the vehicle low-voltage power grid and the safety of the whole vehicle.

[0054] Another vehicle low-voltage power grid abnormality processing method flow chart proposed in an embodiment of the present invention is applied to a vehicle low-voltage power grid control module PNG, such as Figure 3 The vehicle low-voltage power grid abnormality processing method comprises:

[0055] Step S210, detecting changes in the current and voltage of the battery within a preset period of time.

[0056] This step is similar to the above step S110 and will not be described again here.

[0057] Step S220, if it is detected that the current of the battery is less than the first preset threshold value and the voltage is unchanged within the preset time period, then determining that the abnormal state of the power supply component is a battery abnormality;

[0058] In an embodiment, the first preset threshold may be preset in advance by a technician based on experience. For example, the first preset threshold may be 1A, and the present invention does not impose any special limitation on this.

[0059] In this embodiment, the battery abnormality includes: battery connection abnormality and battery charging abnormality.

[0060] In this embodiment, if it is detected that the current of the battery is 0 and the voltage is unchanged within a preset time period, it is determined that the abnormal state of the battery is abnormal battery connection.

[0061] In practice, during normal vehicle driving, the engine operates normally to supply power to the battery and the vehicle's low-voltage power grid. If the battery is short-circuited or the positive and negative poles are broken, the generator will no longer supply power to the battery, and the EBS will be powered by the generator. The EBS detects that the current I is 0 and the voltage U does not change. During engine operation, if the EBS falls off the negative pole, the generator will no longer supply power to the battery, and the EBS will be powered by the generator. The current detected by the EBS is 0 and the voltage does not change. Both situations indicate that the vehicle's low-voltage power grid is short-circuited and the battery is abnormally connected and cannot be used. At this time, the power supply for the vehicle's low-voltage power grid is determined to be the generator, and the user is prompted.

[0062] In this embodiment, if it is detected that the charging current of the battery is continuously less than the third preset threshold value and the battery power is less than the fourth preset threshold value within the preset time period, the abnormal state of the battery is determined to be abnormal battery charging.

[0063] In this embodiment, the third preset threshold and the fourth preset threshold are set by technicians based on experience, wherein the third preset threshold is used to determine whether the battery charging current is small, and the fourth preset threshold is used to determine whether the battery has a small charging current when the battery is fully charged.

[0064] In actual applications, when the battery ages, the internal resistance of the battery increases, the available capacity decreases, and it cannot provide enough energy for electrical components, and the battery may experience abnormal charging.

[0065] In this embodiment, the third preset threshold value may be 1A, and the fourth preset threshold value may be 70%. The EBS determines whether the battery has a charging abnormality through the rate of change of current and voltage, specifically including: when the vehicle is driving, the generator charges the battery. If the EBS detects and determines that the charging current is less than 1A for a preset time, and the battery power is less than 70%, it indicates that the battery is low on power and the charging current is small. At this time, it is determined that the battery has a charging abnormality.

[0066] Step S230: If it is detected that the current of the battery is less than the second preset threshold and the voltage continues to drop within the preset time period, it is determined that the abnormal state of the power supply component is an abnormality of the main power supply device.

[0067] In this embodiment, the second preset threshold is determined by technicians based on experience and may be 0. The present invention does not impose any special limitation on this.

[0068] In actual application, during normal driving of the vehicle, the engine runs normally. If the negative wire harness falls off or breaks, the generator will no longer supply power to the battery and EBS. The EBS is powered by the battery. The EBS detects that the current is 0 and the voltage begins to drop, indicating that the main power supply equipment is abnormal and the vehicle's low-voltage power grid is powered by the battery.

[0069] During engine operation, if the positive wiring harness falls off, the generator will no longer supply power to the battery and EBS. The EBS will be powered by the battery. The EBS detects that the current is 0 and the voltage begins to drop, indicating that the main power supply equipment is abnormal and the vehicle's low-voltage power grid is powered by the battery.

[0070] Step S240, when a battery abnormality occurs, the main power supply device is used as the power source for the vehicle low-voltage power grid, and a first prompt message is displayed to the user.

[0071] In this embodiment, the first prompt information may be: "battery abnormality", or "battery connection abnormality", "battery charging abnormality", etc.

[0072] Step S250, when an abnormality occurs in the main power supply equipment, the battery is used as the power source for the vehicle low-voltage power grid, and a second prompt message is displayed to the user.

[0073] In this embodiment, the second prompt information may be: "Generator abnormality" or the like.

[0074] In this embodiment, when a main power supply device is present and a storage battery is used as a power source for the vehicle low-voltage power grid, the method further includes:

[0075] S1, detecting the changes in the current and voltage of the battery within a preset period of time;

[0076] In this embodiment, when the battery is used as the vehicle low-voltage power grid, the EBS can detect the changes in current and voltage during the battery discharge process to further determine the state of the battery.

[0077] S2, determining a discharge state of the battery according to a change in current and voltage of the battery and a preset threshold value;

[0078] In this embodiment, the preset threshold value may be preset in advance by a technician based on experience, or may be calculated in real time by PNG based on the vehicle status.

[0079] S3, when it is detected that the discharge state of the battery is abnormal, displaying a third prompt message to the user.

[0080] In this embodiment, the abnormal state of the battery discharge state includes: the battery remaining capacity is less than a preset remaining capacity or the battery discharge is abnormal.

[0081] Wherein, step S2 comprises:

[0082] Step S21, using the current battery power and the estimated vehicle power consumption to determine whether the battery remaining power is less than a preset remaining power;

[0083] In practice, when an abnormality occurs in the main power supply equipment of a vehicle while driving, the entire vehicle is powered by the battery. However, due to the excessive energy consumption of electrical components, the battery cannot provide current for the entire vehicle for too long. In order to ensure that modules such as the braking system and steering system work normally for a period of time, it is necessary to predict the battery remaining capacity.

[0084] In this embodiment, the current charge of the battery can be obtained through EBS detection, and the estimated power consumption of the vehicle can be calculated by current integration based on the working time T and the whole vehicle working current I, where the working time T is the time required for the vehicle to stop determined based on historical information, and the whole vehicle working current I is the current generated when the whole vehicle is electrically working determined based on historical information.

[0085] In this embodiment, the voltage drop caused by the internal resistance of the battery can also be determined according to the internal resistance of the battery. The internal resistance of the battery can be calculated according to the changes in the current and voltage detected by the EBS.

[0086] In practice, the voltage operating range of general electrical appliances is 9-16V, so it is necessary to ensure that the battery voltage U1 is higher than 9V before the vehicle stops to ensure safe parking of the vehicle. Therefore, after calculating the estimated vehicle power consumption and the current battery power, the estimated battery remaining capacity can be obtained, and the estimated battery voltage can be further converted based on the estimated battery remaining capacity. The final battery voltage U1 is calculated based on the estimated voltage and the voltage drop caused by the resistance.

[0087] If the final calculated U1 is greater than 9V, it indicates that the battery has sufficient remaining power. If the final calculated U1 is less than 9V, it indicates that the battery has insufficient remaining power.

[0088] In this embodiment, if the battery remaining capacity is insufficient, a fourth prompt message is displayed to the user, and the use of preset vehicle electrical equipment is restricted.

[0089] In this embodiment, if the battery power is insufficient, it is necessary to limit the use of some unnecessary vehicle electrical equipment, such as air conditioning, mobile phone charging power supply, etc., to ensure the normal operation of modules such as the braking system and the steering system to ensure the safety of the entire vehicle.

[0090] Step S22, using the battery discharge current and the battery voltage to determine whether the battery discharge is normal, if the battery discharge current is continuously less than the fifth preset threshold, and the voltage is less than the sixth preset threshold, it is determined that the battery discharge is abnormal.

[0091] In this embodiment, the EBS detects the battery discharge current and the battery voltage to determine whether the battery has abnormal discharge.

[0092] In practice, the loss of active material will cause the battery capacity to decrease. If the battery discharge current is less than the fifth preset threshold and the voltage is less than the sixth preset threshold, it is considered that the battery capacity has decreased and the battery discharge is abnormal.

[0093] If the battery discharge is abnormal, the fifth prompt message is displayed to the user to prompt the user to replace the battery in time.

[0094] In this embodiment, the battery status can be further determined by detecting the changes in the battery current and voltage, including abnormal battery charging, abnormal battery discharging, and insufficient battery remaining capacity, so that the user can be notified of the battery status in time, so that the user can handle the abnormality in time.

[0095] In this embodiment, during vehicle driving, if the main power supply equipment is abnormal and a battery is needed as the power supply, the remaining battery power is further judged. If the remaining power is insufficient, the use of unnecessary electrical equipment is restricted, and priority is given to ensuring the normal operation of modules such as the braking system and the steering system to ensure driving safety and further improve the safety of the entire vehicle.

[0096] The embodiment of the present invention also provides a vehicle low-voltage power grid abnormality processing device. Figure 4 FIG. 1 is a schematic diagram of a vehicle low-voltage power grid abnormality processing device according to an embodiment of the present invention. Figure 4 The vehicle low-voltage power grid abnormality processing device 300 provided by the present invention includes:

[0097] The detection module 301 is used to detect the change of the current and voltage of the battery within a preset period of time;

[0098] The determination module 302 is used to determine the abnormal state of the power supply component of the vehicle low-voltage power grid according to the changes in the current and voltage, wherein the abnormal state of the power supply component includes: abnormal battery and abnormal main power supply equipment;

[0099] The switching module 303 is used to switch the power supply currently used by the vehicle low-voltage power grid according to the abnormal state of the power supply component.

[0100] Optionally, the determining module 302 includes:

[0101] A first determination submodule, configured to determine that the abnormal state of the power supply component is a battery abnormality if it is detected that the current of the battery is less than a first preset threshold and the voltage is unchanged within the preset time period;

[0102] The second determination submodule is used to determine that the abnormal state of the power supply component is an abnormality of the main power supply device if it is detected that the current of the battery is less than a second preset threshold and the voltage continues to decrease within the preset time period.

[0103] Optionally, the battery abnormality includes: battery connection abnormality and battery charging abnormality; and the first determining submodule includes:

[0104] A first determining unit, configured to determine that the abnormal state of the battery is abnormal battery connection if it is detected that the current of the battery is a preset value and the voltage is unchanged within a preset time period;

[0105] The second determination unit is used to determine that the abnormal state of the battery is abnormal battery charging if it is detected that the charging current of the battery is continuously less than a third preset threshold value and the battery power is less than a fourth preset threshold value within a preset time period.

[0106] Optionally, the switching module 303 includes:

[0107] A first switching submodule is used to use the main power supply device as the power source for the vehicle low-voltage power grid when the abnormal situation is a situation indicating an abnormality of the battery, and to display a first prompt message to the user;

[0108] The second switching submodule is used to use the battery as the power source for the vehicle low-voltage power grid when the abnormal situation is a situation that indicates an abnormality in the main power supply equipment, and to display a second prompt message to the user.

[0109] Optionally, when a storage battery is used as the power source for the vehicle low-voltage power grid, the device further comprises:

[0110] A first detection module, used to detect changes in current and voltage of the battery within a preset period of time;

[0111] A first determination module, used to determine the discharge state of the battery according to the change amount of the current and voltage of the battery and a preset threshold value;

[0112] The prompt module is used to display third prompt information to the user when it is detected that the discharge state of the battery is abnormal.

[0113] Optionally, the abnormal state of the battery discharge state includes: the battery remaining amount is less than a preset remaining amount or the battery discharge is abnormal; the first determination module includes:

[0114] The first determination submodule is used to determine whether the remaining battery power is less than a preset remaining power according to the current battery power and the estimated vehicle power consumption;

[0115] The second determination submodule is used to determine whether the battery discharge is normal based on the battery discharge current and the battery voltage. If the battery discharge current is continuously less than the fifth preset threshold and the voltage is less than the sixth preset threshold, it is determined that the battery discharge is abnormal.

[0116] Optionally, the prompt module includes:

[0117] A restriction submodule, for displaying a fourth prompt message to the user and restricting the use of preset electrical equipment on the vehicle if the battery remaining capacity is insufficient;

[0118] The fifth prompt submodule is used to display the fifth prompt information to the user if the battery discharge is abnormal.

[0119] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0120] An embodiment of the present invention further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the vehicle low-voltage power grid abnormality processing method proposed in the embodiment of the present invention is implemented.

[0121] Accordingly, the present invention also proposes an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the vehicle low-voltage power grid abnormality processing method as described in the embodiment of the present invention is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. The electronic device can be a PC, a mobile terminal, a personal digital assistant, a tablet computer, etc.

[0122] The present invention also proposes a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the vehicle low-voltage power grid abnormality handling method as described in the embodiment of the present invention are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0123] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0124] The above is a detailed introduction to the vehicle low-voltage power grid abnormality processing method, device, electronic device and computer-readable storage medium provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for handling abnormalities in a vehicle low-voltage power grid, characterized in that: The method comprises: Detecting changes in current and voltage of the battery within a preset period of time; Determine the abnormal state of the power supply component of the vehicle low-voltage power grid according to the changes in the current and voltage, wherein the abnormal state of the power supply component includes: abnormal battery and abnormal main power supply equipment; According to the abnormal state of the power supply component, the power supply currently used by the vehicle low-voltage power grid is switched; Determining the abnormal state of the power supply component of the vehicle low-voltage power grid according to the changes in the current and voltage includes: If it is detected that the current of the battery is less than the first preset threshold value and the voltage remains unchanged within the preset time period, it is determined that the abnormal state of the power supply component is a battery abnormality; If it is detected within a preset time period that the current of the storage battery is less than a second preset threshold value and the voltage continues to decrease, it is determined that the abnormal state of the power supply component is an abnormality of the main power supply device; The battery abnormality includes: battery connection abnormality, battery charging abnormality; If it is detected that the current of the battery is a preset value and the voltage is unchanged within a preset time period, determining that the abnormal state of the battery is abnormal battery connection; If it is detected that the charging current of the battery is continuously less than the third preset threshold value and the battery power is less than the fourth preset threshold value within the preset time period, it is determined that the abnormal state of the battery is abnormal battery charging.

2. The method according to claim 1, characterized in that According to the abnormal state, switching the power source of the vehicle low-voltage power grid includes: When the abnormal state is a condition indicating an abnormality of the battery, a main power supply device is used as a power source for the low-voltage power grid of the vehicle, and a first prompt message is displayed to the user; When the abnormal state is a condition indicating an abnormality in the main power supply device, a storage battery is used as a power source for the vehicle low-voltage power grid, and a second prompt message is displayed to the user.

3. The method according to claim 2, characterized in that When a battery is used as a power source for the vehicle low-voltage power grid, the method further comprises: Detecting changes in current and voltage of the battery within a preset period of time; Determining a discharge state of the battery according to changes in the current and voltage of the battery and a preset threshold; When it is detected that the discharge state of the storage battery is an abnormal state, a third prompt message is displayed to the user.

4. The method according to claim 3, characterized in that The abnormal state of the battery discharge state includes: the battery remaining amount is less than the preset remaining amount or the battery discharge is abnormal; the determining the battery discharge state according to the change amount of the battery current and voltage and the preset threshold value includes: Determine whether the remaining battery power is less than a preset remaining power based on the current battery power and the estimated vehicle power consumption; Whether the battery discharge is normal is determined based on the battery discharge current and the battery voltage. If the battery discharge current is continuously less than the fifth preset threshold and the voltage is less than the sixth preset threshold, it is determined that the battery discharge is abnormal.

5. The method according to claim 3 or 4, characterized in that: The displaying of third prompt information to the user according to the battery status includes: If the battery level is low, a fourth prompt message is displayed to the user, and the use of preset electrical devices on the vehicle is restricted; If the battery discharge is abnormal, the fifth prompt message is displayed to the user.

6. A vehicle low-voltage power grid abnormality processing device, characterized in that: The device comprises: A detection module, used to detect changes in current and voltage of the battery within a preset period of time; A determination module, used to determine the abnormal state of the power supply component of the vehicle low-voltage power grid according to the changes in the current and voltage, wherein the abnormal state of the power supply component includes: abnormal battery and abnormal main power supply equipment; A switching module, used for switching the power supply currently relied on by the vehicle low-voltage power grid according to the abnormal state of the power supply component; The determining module comprises: A first determination submodule, configured to determine that the abnormal state of the power supply component is a battery abnormality if it is detected that the current of the battery is less than a first preset threshold and the voltage is unchanged within a preset time period; A second determination submodule is used to determine that the abnormal state of the power supply component is an abnormality of the main power supply device if it is detected that the current of the storage battery is less than a second preset threshold value and the voltage continues to decrease within a preset time period; The battery abnormality includes: battery connection abnormality and battery charging abnormality; the first determination submodule includes: A first determining unit, configured to determine that the abnormal state of the battery is abnormal battery connection if it is detected that the current of the battery is a preset value and the voltage is unchanged within a preset time period; The second determination unit is used to determine that the abnormal state of the battery is abnormal battery charging if it is detected that the charging current of the battery is continuously less than a third preset threshold value and the battery power is less than a fourth preset threshold value within a preset time period.

7. A vehicle, comprising a power controller, characterized in that: The power supply controller implements the vehicle low-voltage power grid abnormality processing method described in any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the vehicle low-voltage power grid abnormality processing method described in any one of claims 1 to 5 are implemented.

Images