Low-voltage power supply control method, device, equipment and storage medium

Abstract

The invention discloses a low-voltage power supply control method, device and equipment and a storage medium, and relates to the technical field of vehicles. The method is applied to a vehicle control unit of a vehicle and comprises the steps of obtaining working condition data of the vehicle and state parameter data of a low-voltage power supply module, judging whether the working condition of the vehicle is an abnormal working condition or not according to the working condition data of the vehicle, and judging whether the low-voltage power supply module is normal or not according to the state parameter data of the low-voltage power supply module. And when the working condition of the vehicle is an abnormal working condition and the low-voltage power supply module is in a normal state, a first control instruction is sent to the low-voltage power supply module control unit, so that the low-voltage power supply module control unit controls the switch module to keep a closed state according to the first control instruction, and the low-voltage power supply module continuously supplies power to the low-voltage load module. According to the embodiment, low-voltage power supply can be stably maintained under the abnormal working condition of the vehicle.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and in particular, relates to a low-voltage power supply control method, device, equipment, storage medium and computer program product. Background Art

[0002] With the development of automobile technology, electric vehicles are becoming more and more popular, and the battery safety of electric vehicles has become one of the key issues. In order to ensure the safety of the battery cells of the vehicle's low-voltage battery, a built-in switch is currently built into the low-voltage battery to ensure the safety of the battery cells by forcibly disconnecting the switch under abnormal conditions. However, the disconnection of the switch also brings about the problem of power failure of the entire vehicle. For certain abnormal conditions, such as vehicle collision and thermal runaway conditions, the low-voltage battery stops supplying low-voltage power, causing the entire vehicle to lose power, which may lead to untimely rescue of people in the vehicle or other safety hazards.

[0003] Therefore, there is an urgent need for a low-voltage power supply control method under abnormal vehicle operating conditions. Summary of the invention

[0004] Embodiments of the present application provide a low-voltage power supply control method, apparatus, device, storage medium, and computer program product that can maintain low-voltage power supply under abnormal vehicle operating conditions.

[0005] In a first aspect, an embodiment of the present application provides a low-voltage power supply control method, which is applied to a vehicle controller of a vehicle, wherein the vehicle includes a low-voltage power supply module and a low-voltage power supply module control unit, the low-voltage power supply module is used to power a low-voltage load module, and a switch module is provided on the power supply line of the low-voltage power supply module and the low-voltage load module; the method includes:

[0006] Obtaining the vehicle's operating condition data and the status parameter data of the low-voltage power supply module;

[0007] Determine whether the operating condition of the vehicle is an abnormal condition according to the operating condition data of the vehicle, and determine whether the low-voltage power supply module is normal according to the status parameter data of the low-voltage power supply module;

[0008] When the vehicle's operating condition is abnormal and the low-voltage power supply module is in a normal state, a first control instruction is sent to the low-voltage power supply module control unit so that the low-voltage power supply module control unit controls the switch module to remain in a closed state according to the first control instruction, so that the low-voltage power supply module can continuously supply power to the low-voltage load module.

[0009] In a second aspect, an embodiment of the present application provides a low-voltage power supply control device, which is applied to a vehicle controller of a vehicle, wherein the vehicle includes a low-voltage power supply module and a low-voltage power supply module control unit, wherein the low-voltage power supply module is used to power a low-voltage load module, and a switch module is provided on the power supply line of the low-voltage power supply module and the low-voltage load module; the device includes:

[0010] An acquisition module, used to acquire the working condition data of the vehicle and the status parameter data of the low-voltage power supply module;

[0011] A judgment module, used to judge whether the working condition of the vehicle is an abnormal working condition according to the working condition data of the vehicle, and to judge whether the low-voltage power supply module is normal according to the state parameter data of the low-voltage power supply module;

[0012] The control module is used to send a first control instruction to the low-voltage power supply module control unit when the vehicle's operating condition is abnormal and the low-voltage power supply module is in a normal state, so that the low-voltage power supply module control unit controls the switch module to remain in a closed state according to the first control instruction, so that the low-voltage power supply module can continuously supply power to the low-voltage load module.

[0013] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, the low-voltage power supply control method of the first aspect is implemented.

[0014] In a fourth aspect, an embodiment of the present application provides a computer storage medium having computer program instructions stored thereon, and when the computer program instructions are executed by a processor, a low-voltage power supply control method as in the first aspect is implemented.

[0015] In a fifth aspect, an embodiment of the present application provides a computer program product. When instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the low-voltage power supply control method as in the first aspect.

[0016] In a sixth aspect, an embodiment of the present application provides a vehicle, the vehicle comprising at least one of the following:

[0017] A low-voltage power supply control device as in any one of the embodiments of the second aspect;

[0018] An electronic device as in any one of the embodiments of the third aspect;

[0019] A computer storage medium as in any one of the embodiments of the fourth aspect;

[0020] A computer program product as in any embodiment of the fifth aspect.

[0021] The low-voltage power supply maintenance method, device, equipment, storage medium and computer program product of the embodiment of the present application, by obtaining the working condition data of the vehicle and the state parameter data of the low-voltage power supply module; judging whether the working condition of the vehicle is an abnormal working condition according to the working condition data of the vehicle, and judging whether the low-voltage power supply module is normal according to the state parameter data of the low-voltage power supply module, when the working condition of the vehicle is an abnormal working condition and the low-voltage power supply module is in a normal state, sending a first control instruction to the low-voltage power supply module control unit, the first control instruction is used to control the switch between the low-voltage power supply module and the low-voltage load module to close, so that the low-voltage power supply module control unit controls the switch module to keep the closed state according to the first control instruction, and the low-voltage power supply module can continuously supply power to the low-voltage load module to ensure that the vehicle can still be unlocked normally under abnormal working conditions, thus avoiding the untimely rescue of the occupants or other safety hazards caused by the power failure of the whole vehicle. At the same time, the embodiment of the present application can stably maintain low-voltage power supply for abnormal working conditions without increasing additional hardware costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 is a structural schematic diagram of a vehicle provided by an embodiment of the present application;

[0024] Figure 2 It is a flowchart of a low-voltage power supply control method provided by an embodiment of the present application;

[0025] Figure 3 is a flow chart of a low-voltage power supply control method provided by another embodiment of the present application;

[0026] Figure 4 It is a schematic diagram of a 12V lithium battery short circuit test data table provided by an embodiment of the present application;

[0027] Figure 5 It is a structural schematic diagram of a low-voltage power supply control device provided by an embodiment of the present application;

[0028] Figure 6 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0029] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0031] With the development of automobile technology, electric vehicles are becoming more and more popular, and the battery safety of electric vehicles has become one of the key issues. In order to ensure the safety of the battery cells of the vehicle's low-voltage battery, a built-in switch is currently built into the low-voltage battery, such as a built-in field effect tube MOS switch in a 12V lithium battery, and the switch is forcibly disconnected under abnormal conditions to ensure the safety of the battery cells. However, the disconnection of the switch also brings about the problem of power failure of the entire vehicle. For certain abnormal conditions, such as vehicle collision and thermal runaway conditions, the low-voltage battery stops supplying low-voltage power, which will make it difficult to unlock the vehicle normally, making it inconvenient to carry out rescue work for the people in the car and unable to ensure the safety of the people in the car.

[0032] Therefore, there is an urgent need for a low-voltage power supply control method under abnormal vehicle operating conditions.

[0033] The prior art often sets a backup power supply in the vehicle, and when the vehicle is in an abnormal working condition, the backup power supply is used to maintain the low-voltage power supply of the vehicle. However, the addition of the backup power supply increases the production cost of the vehicle, and maintaining the low-voltage power supply by switching the power supply is not conducive to the stability of the low-voltage power supply.

[0034] In order to solve the problems of the prior art, the embodiments of the present application provide a low-voltage power supply control method, device, equipment, storage medium and computer program product. The present application obtains the working condition data of the vehicle and the state parameter data of the low-voltage power supply module; judges whether the working condition of the vehicle is an abnormal working condition according to the working condition data of the vehicle, and judges whether the low-voltage power supply module is normal according to the state parameter data of the low-voltage power supply module. When the working condition of the vehicle is an abnormal working condition and the low-voltage power supply module is in a normal state, a first control instruction is sent to the low-voltage power supply module control unit, and the first control instruction is used to control the switch between the low-voltage power supply module and the low-voltage load module to close, so that the low-voltage power supply module control unit controls the switch module to keep the closed state according to the first control instruction, so that the low-voltage power supply module can continuously supply power to the low-voltage load module, so as to ensure that the vehicle can still be unlocked normally under abnormal working conditions, thereby ensuring the safety of the passengers in the vehicle. At the same time, the embodiments of the present application can stably maintain low-voltage power supply for abnormal working conditions without increasing additional hardware costs.

[0035] The following first introduces the low-voltage power supply control method provided in the embodiment of the present application.

[0036] The low voltage power supply control method is applied to the vehicle controller of the vehicle, such as Figure 1 As shown, the vehicle includes a vehicle controller 101, a low-voltage power supply module 102, a low-voltage load module 103, a low-voltage power supply module control unit 104, an airbag 105, an airbag controller 106, a power battery 107 and a power battery control unit 108.

[0037] Among them, the low-voltage power supply module 102 is used to supply power to the low-voltage load module 103, and a switch module 109 is provided on the power supply line of the low-voltage power supply module 102 and the low-voltage load module 103. The switch module 109 is used to control the low-voltage power supply module 102 to continue or stop supplying power to the low-voltage load module 103. The airbag controller 106 is connected to the airbag 105 for controlling the airbag 105 to pop out. The power battery control unit 108 is used to control the power battery 107 to provide power for the vehicle.

[0038] As an example, the low-voltage power supply module 102 may be a 12V lithium battery, and the switch module 109 may be a field effect transistor MOS switch.

[0039] Figure 2 A schematic flow chart of a low-voltage power supply control method provided by an embodiment of the present application is shown. The low-voltage power supply control method may include the following steps: S201 to S203.

[0040] S201: Acquire the vehicle's operating condition data and the status parameter data of the low-voltage power supply module.

[0041] The vehicle operating condition data is used to characterize the vehicle operating condition, and the vehicle operating condition may include normal operating condition and abnormal operating condition. The vehicle operating condition data may include the state parameter data of the airbag and / or the state parameter data of the power battery.

[0042] The state parameter data of the low-voltage power supply module is used to characterize the working condition of the low-voltage power supply module. The state parameter data of the low-voltage power supply module may include the temperature and / or power of the low-voltage power supply module.

[0043] S202: Determine whether the operating condition of the vehicle is an abnormal condition based on the operating condition data of the vehicle, and determine whether the low-voltage power supply module is normal based on the state parameter data of the low-voltage power supply module.

[0044] When the low-voltage power supply module is operating in an abnormal condition, the low-voltage power supply module cannot supply power normally. If the switch module between the low-voltage power supply module and the low-voltage load module is in a closed state, the low-voltage power supply module may be damaged or other safety problems may occur.

[0045] Therefore, this embodiment determines whether the low-voltage power supply module is normal based on the status parameter data of the low-voltage power supply module. After ensuring that the low-voltage power supply module is normal, the subsequent low-voltage power supply control method is executed, which can avoid damage to the low-voltage power supply module and ensure vehicle safety.

[0046] In some embodiments, judging whether the vehicle's operating condition is an abnormal operating condition based on the vehicle's operating condition data can be achieved by judging whether the vehicle is in a collision state based on the airbag's state parameter data, and / or judging whether the power battery is in a thermal runaway state based on the power battery's state parameter data. When the vehicle is in a collision state, and / or the power battery is in a thermal runaway state, it can be determined that the vehicle's operating condition is an abnormal operating condition.

[0047] In some embodiments, the above-mentioned determination of whether the low-voltage power supply module is normal based on the status parameter data of the low-voltage power supply module can be achieved by determining whether the temperature of the low-voltage power supply module is greater than a preset temperature and / or whether the power is lower than a preset power threshold. When the temperature of the low-voltage power supply module is lower than the preset temperature and / or the power is higher than the preset power threshold, it can be determined that the low-voltage power supply module is in a normal state; otherwise, it can be determined that the low-voltage power supply module is in an abnormal state.

[0048] S203: When the vehicle's operating condition is abnormal and the low-voltage power supply module is in a normal state, a first control instruction is sent to the low-voltage power supply module control unit so that the low-voltage power supply module control unit controls the switch module to remain in a closed state according to the first control instruction, so that the low-voltage power supply module can continuously supply power to the low-voltage load module.

[0049] The first control instruction is used to instruct the switch module between the low-voltage power supply module and the low-voltage load module to remain in a closed state.

[0050] By keeping the switch module between the low-voltage power supply module and the low-voltage load module in a closed state when the vehicle is in an abnormal operating condition and the low-voltage power supply module is in a normal state, the low-voltage power supply module can continuously supply power to the low-voltage load module, thereby avoiding the problem of power failure of the entire vehicle caused by sudden disconnection of the switch module under abnormal operating conditions of the vehicle, and avoiding the untimely rescue of people in the vehicle or other safety hazards caused by power failure of the entire vehicle.

[0051] The embodiment of the present application obtains the working condition data of the vehicle and the state parameter data of the low-voltage power supply module; determines whether the working condition of the vehicle is an abnormal condition according to the working condition data of the vehicle, and determines whether the low-voltage power supply module is normal according to the state parameter data of the low-voltage power supply module. When the working condition of the vehicle is an abnormal condition and the low-voltage power supply module is in a normal state, a first control instruction is sent to the low-voltage power supply module control unit, and the first control instruction is used to control the switch between the low-voltage power supply module and the low-voltage load module to close, so that the low-voltage power supply module control unit controls the switch module to maintain a closed state according to the first control instruction, and the low-voltage power supply module can continuously supply power to the low-voltage load module, so as to ensure that the vehicle can still be unlocked normally under abnormal working conditions, thereby ensuring the safety of passengers in the vehicle. At the same time, the embodiment of the present application can stably maintain low-voltage power supply for abnormal working conditions without increasing additional hardware costs.

[0052] In some embodiments, in order to accurately determine whether the operating condition of the vehicle is an abnormal operating condition, step S202: determining whether the operating condition of the vehicle is an abnormal operating condition may include:

[0053] Determining whether the vehicle is in a collision state according to the state parameter data of the airbag, and / or determining whether the power battery is in a thermal runaway state according to the state parameter data of the power battery;

[0054] When the vehicle is in a collision state and / or the power battery is in a thermal runaway state, it is determined that the operating condition of the vehicle is an abnormal operating condition.

[0055] The abnormal operating condition of the vehicle may include the vehicle being in a collision state and / or the power battery being in a thermal runaway state.

[0056] The state parameter data of the airbag can represent the state of the airbag, and the working condition of the vehicle can be judged by the state of the airbag. The state parameter data of the power battery can represent the state of the power battery, and whether the power battery is in a thermal runaway state can be judged by the state of the power battery.

[0057] In some embodiments, Figure 3As shown, in step S203: when the operating condition of the vehicle is an abnormal condition, a control instruction is sent to the low-voltage power supply module control unit so that the low-voltage power supply module control unit controls the switch module to remain in a closed state according to the control instruction, the method also includes: steps S301 to S305.

[0058] Step S301: Acquire the current of the power supply line.

[0059] Step S302: determine whether there is an overcurrent fault in the power supply line according to the current; if there is an overcurrent fault, execute the next step; if there is no overcurrent fault, go to step S306.

[0060] Step S303: Compare the fusing time of the fusing component with a preset fusing time threshold.

[0061] Step S304: When the fusing time is less than or equal to the preset fusing time threshold, a first control instruction is sent to the low-voltage power supply module control unit, so that the low-voltage power supply module control unit controls the switch module to remain in a closed state according to the first control instruction.

[0062] Step S305: When the fusing time is greater than the preset fusing time threshold, a second control instruction is sent to the low-voltage power supply module control unit, so that the low-voltage power supply module control unit controls the switch module to disconnect after a preset time according to the second control instruction.

[0063] Step S306: Send a first control instruction to the low-voltage power supply module control unit, so that the low-voltage power supply module control unit controls the switch module to remain in a closed state according to the first control instruction.

[0064] The second control instruction is used to instruct the switch module between the low-voltage power supply module and the low-voltage load module to be disconnected after a preset time period.

[0065] When the vehicle is in an abnormal operating condition, if there is an overcurrent fault in the power supply line at the same time, continuing to maintain the low-voltage power supply of the whole vehicle may cause the risk of high-temperature explosion due to the overcurrent fault. The fuse component on the power supply line can protect the power supply line from overload. When the fuse component blows within the preset fuse time threshold, the current on the power supply line is cut off, and the overcurrent fault disappears. At this time, there is no risk that may be caused by the overcurrent fault. The low-voltage power supply module control unit can control the switch module to remain in a closed state according to the first control instruction, and continue to maintain the low-voltage power supply of the whole vehicle. When the fuse time of the fuse component has exceeded the preset fuse time threshold, it is difficult to avoid the risk caused by the overcurrent fault. The low-voltage power supply module control unit controls the switch module to disconnect after the preset time according to the second control instruction, and stops the low-voltage power supply after the preset time to ensure the safety of the vehicle.

[0066] When the vehicle operating condition is abnormal and there is an overcurrent fault in the power supply line at the same time, the fusing time of the fuse component on the power supply line is taken into consideration, and the control instructions for the low-voltage power supply of the whole vehicle are determined according to the fusing time of the fuse component, so as to start different low-voltage power supply strategies accordingly. This can take into account the actual situation under the abnormal operating condition of the vehicle, and improve the practicability and robustness of the low-voltage power supply control method.

[0067] Among them, the preset fuse time threshold can be set manually, which will not be repeated here.

[0068] In some embodiments, after step S202: judging whether the low-voltage power supply module is normal according to the state parameter data of the low-voltage power supply module, the low-voltage power supply control method may further include:

[0069] When the low-voltage power supply module is in an abnormal state, a third control instruction is sent to the low-voltage power supply module control unit, so that the low-voltage power supply module control unit controls the switch module to be disconnected according to the third control instruction.

[0070] The third control instruction is used to instruct to disconnect the switch module between the low-voltage power supply module and the low-voltage load module.

[0071] When the working condition of the low-voltage power supply module is abnormal, the low-voltage power supply module cannot supply power normally and there is a safety hazard. In this case, if the switch module between the low-voltage power supply module and the low-voltage load module is kept in a closed state, the low-voltage power supply module may be damaged or other safety problems may occur.

[0072] By sending a third control instruction to the low-voltage power supply module control unit when the low-voltage power supply module is in an abnormal state, so that the low-voltage power supply module control unit controls the switch module to disconnect according to the third control instruction, damage to the low-voltage power supply module and other safety problems caused by abnormal operating conditions of the low-voltage power supply module can be avoided.

[0073] In some embodiments, the state parameter data of the low-voltage power supply module may include the temperature and / or power of the low-voltage power supply module; step S202: judging whether the low-voltage power supply module is normal according to the state parameter data of the low-voltage power supply module may include:

[0074] Determine whether the temperature of the low-voltage power supply module is greater than a preset temperature and / or whether the power level is lower than a preset power threshold;

[0075] When the temperature of the low-voltage power supply module is lower than a preset temperature and / or the power level is higher than a preset power threshold, it is determined that the low-voltage power supply module is in a normal state; otherwise, it is determined that the low-voltage power supply module is in an abnormal state.

[0076] The status parameter data of the low-voltage power supply module can be used to accurately determine the status of the low-voltage power supply module. Specifically, whether the low-voltage power supply is in a normal state can be determined by judging whether the temperature and / or power of the low-voltage power supply module is within a normal range.

[0077] By judging whether the temperature of the low-voltage power supply module is greater than a preset temperature and / or whether the power level is lower than a preset power threshold, if the temperature of the low-voltage power supply module is lower than the preset temperature and / or the power level is higher than the preset power threshold, it is determined that the low-voltage power supply module is in a normal state; otherwise, it is determined that the low-voltage power supply module is in an abnormal state, thereby improving the accuracy and efficiency of judging whether the low-voltage power supply module is normal.

[0078] Among them, the preset temperature and the preset power threshold can be set manually, which will not be described in detail here.

[0079] In some embodiments, the state parameter data of the airbag may include the pressure of the airbag, and the above-mentioned determination of whether the vehicle is in a collision state according to the state parameter data of the airbag may include:

[0080] Determine whether the airbag pressure is greater than a preset pressure threshold;

[0081] When the pressure of the airbag is greater than a preset pressure threshold, it is determined that the vehicle is in a collision state.

[0082] Airbags are a passive safety protection system in vehicles. They are used in conjunction with seat belts to provide effective anti-collision protection for the vehicle's passengers when the vehicle collides. By determining whether the pressure of the airbag is greater than a preset pressure threshold, the vehicle is determined to be in a collision state when the pressure of the airbag is greater than the preset pressure threshold, and whether the vehicle is in a collision state can be accurately determined.

[0083] Among them, the preset pressure threshold can be set manually, which will not be described in detail here.

[0084] In some embodiments, in step S203: when the operating condition of the vehicle is an abnormal condition and the low-voltage power supply module is in a normal state, before sending a first control instruction to the low-voltage power supply module control unit, the low-voltage power supply control method may further include:

[0085] Determine the level of abnormal operating condition based on the vehicle's operating condition data;

[0086] Step S203: When the operating condition of the vehicle is an abnormal condition and the low-voltage power supply module is in a normal state, sending a first control instruction to the low-voltage power supply module control unit may include:

[0087] When the operating condition of the vehicle is an abnormal operating condition, the level of the abnormal operating condition is the first level, and the low-voltage power supply module is in a normal state, a first control instruction is sent to the low-voltage power supply module control unit.

[0088] The level of the abnormal vehicle operating condition can be used to indicate the degree of abnormality of the vehicle operating condition. For example, the higher the level of the abnormal vehicle operating condition, the higher the degree of abnormality of the vehicle operating condition.

[0089] The first level may be used to indicate that the abnormality degree of the vehicle operating condition is at a relatively low level.

[0090] A relatively low degree of abnormality in the vehicle operating condition means that there are relatively fewer hidden dangers of other faults or the level of other faults is low. Therefore, when the level of the abnormal operating condition is the first level, a first control instruction can be sent to the low-voltage power supply module control unit to keep the switch module between the low-voltage power supply module and the low-voltage load module in a closed state without excessively considering the safety risks of other vehicles and personnel caused by the continuous closure of the switch module, so as to maintain the low-voltage power supply of the vehicle as much as possible.

[0091] In some embodiments, after determining the level of the abnormal operating condition according to the operating condition data of the vehicle, the low-voltage power supply control method may further include:

[0092] When the operating condition of the vehicle is an abnormal condition, the level of the abnormal condition is the second level and the low-voltage power supply module is in a normal state, a fourth control instruction is sent to the low-voltage power supply module control unit, so that the low-voltage power supply module control unit controls the switch module to disconnect after a preset time according to the fourth control instruction. The preset time is determined based on the melting time of the fuse component on the power supply line and the preset overcurrent protection threshold; the second level of abnormality is higher than the first level of abnormality.

[0093] The second level may be used to indicate that the abnormality degree of the vehicle operating condition is at a relatively high level.

[0094] The fuse component can be used for overload protection of the power supply line. When the current of the power supply line is overloaded and / or the temperature rises to a certain extent, the fuse component itself melts to cut off the current to protect the power supply line. As an example, the fuse component can be a fuse.

[0095] The preset overcurrent protection threshold is used for overload protection of the power supply line. When the current overload of the power supply line reaches the preset overcurrent protection threshold, the fuse component itself fuses to cut off the current. The preset overcurrent protection threshold can be set manually and will not be described in detail here.

[0096] A relatively high degree of abnormality in the vehicle's operating condition means that there are relatively more hidden dangers of other faults or the level of other faults is high. When the level of the vehicle's abnormal operating condition is the second level, continuously maintaining low-voltage power supply may lead to more serious other safety risks, such as the safety risk of the battery cells in the low-voltage power supply module or the risk of high-temperature explosion caused by thermal runaway, short-circuit overcurrent, etc.

[0097] By sending the fourth control instruction to the low-voltage power supply module control unit when the level of the vehicle's abnormal operating condition is the second level, so that the low-voltage power supply module control unit controls the switch module to disconnect after a preset time according to the fourth control instruction, it is possible to maintain the low-voltage power supply of the entire vehicle as much as possible under the vehicle's abnormal operating condition, while avoiding the occurrence of more serious other safety risks, so as to ensure the safety of people in the vehicle.

[0098] In some embodiments, the above-mentioned determination of the preset duration based on the fusing time of the fuse component on the power supply line and the preset overcurrent protection threshold can be achieved through experiments, such as Figure 4 The following is a detailed description of the experiment using a 12V lithium battery as an example.

[0099]

[0100] The following conclusions can be drawn from the above test items and their corresponding test data:

[0101] 1. Regardless of any short-circuit current range, the durability of the battery cell is greater than that of the low-voltage battery control unit (IBS board) and the fuse, and the short-circuit current will not cause safety risks to the battery cell. Then the discharge short-circuit overcurrent disconnection MOS switch can be extended indefinitely without causing thermal runaway.

[0102] 2. Single-unit short-circuit test shows that without fuse protection and without considering the economic efficiency of maintenance, the low-voltage battery control unit burns out and cuts off the power supply circuit within 786ms, and no secondary accidents are caused. Then the discharge short-circuit overcurrent disconnection of the MOS switch will be infinitely extended, which will cause damage to the low-voltage battery control unit.

[0103] 3. The external fuse test shows that when a short-circuit current occurs, the fuse can cut off the short-circuit current within 220ms, and the battery cell and low-voltage battery control unit are not damaged. Then the short-circuit overcurrent disconnects the MOS switch for a longer time, and the fuse melts the fault branch. After the short-circuit current disappears, the MOS switch is still closed, and other modules are still powered normally.

[0104] In summary, it can be concluded that when a short circuit occurs, the external short-circuit resistance is unknown, and the short-circuit current can range from 800A to 2600A. If the short-circuit overcurrent duration is extended indefinitely, in the event of fuse failure, the continuous short-circuit current (current exposure) will bring unpredictable risks to the entire vehicle.

[0105] Therefore, after a vehicle collision, the time for which the low-voltage power supply of the entire vehicle is maintained needs to be determined based on the fuse's melting time and the overcurrent protection threshold. For example, if the shunt resistor detection range is ±700A and the fuse protection time is 950ms at 800A, the MOS switch needs to remain closed for 1s after the collision.

[0106] Figure 5 is a schematic diagram of the structure of a low voltage power supply control device 500 provided in an embodiment of the present application. Figure 5 As shown, the device may include an acquisition module 510 , a determination module 520 , and a control module 530 .

[0107] An acquisition module 510 is used to acquire the working condition data of the vehicle and the state parameter data of the low-voltage power supply module;

[0108] A judgment module 520, used to judge whether the working condition of the vehicle is an abnormal working condition according to the working condition data of the vehicle, and to judge whether the low-voltage power supply module is normal according to the state parameter data of the low-voltage power supply module;

[0109] The control module 530 is used to send a first control instruction to the low-voltage power supply module control unit when the vehicle's operating condition is abnormal and the low-voltage power supply module is in a normal state, so that the low-voltage power supply module control unit controls the switch module to remain in a closed state according to the first control instruction, so that the low-voltage power supply module can continuously supply power to the low-voltage load module.

[0110] The embodiment of the present application obtains the working condition data of the vehicle and the state parameter data of the low-voltage power supply module; determines whether the working condition of the vehicle is an abnormal condition according to the working condition data of the vehicle, and determines whether the low-voltage power supply module is normal according to the state parameter data of the low-voltage power supply module. When the working condition of the vehicle is an abnormal condition and the low-voltage power supply module is in a normal state, a first control instruction is sent to the low-voltage power supply module control unit, and the first control instruction is used to control the switch between the low-voltage power supply module and the low-voltage load module to close, so that the low-voltage power supply module control unit controls the switch module to maintain a closed state according to the first control instruction, and the low-voltage power supply module can continuously supply power to the low-voltage load module, so as to ensure that the vehicle can still be unlocked normally under abnormal working conditions, thereby ensuring the safety of passengers in the vehicle. At the same time, the embodiment of the present application can stably maintain low-voltage power supply for abnormal working conditions without increasing additional hardware costs.

[0111] In some embodiments, the judgment module 520 is further used to judge whether the vehicle is in a collision state according to the state parameter data of the airbag, and / or to judge whether the power battery is in a thermal runaway state according to the state parameter data of the power battery;

[0112] The judgment module 520 is further used to determine that the operating condition of the vehicle is an abnormal operating condition when the vehicle is in a collision state and / or the power battery is in a thermal runaway state.

[0113] In some embodiments, the acquisition module 510 is further used to send a control instruction to the low-voltage power supply module control unit when the operating condition of the vehicle is an abnormal operating condition, so that the low-voltage power supply module control unit controls the switch module to remain in a closed state according to the control instruction, and then obtains the current of the power supply line;

[0114] The judging module 520 is further used to judge whether there is an overcurrent fault in the power supply circuit according to the current;

[0115] The judgment module 520 is further used to compare the fusing time of the fuse component with a preset fusing time threshold when an overcurrent fault occurs in the power supply line;

[0116] The control module 530 is further configured to send a first control instruction to the low-voltage power supply module control unit when the fusing time is less than the preset fusing time threshold, so that the low-voltage power supply module control unit controls the switch module to remain in a closed state according to the first control instruction;

[0117] The control module 530 is also used to send a second control instruction to the low-voltage power supply module control unit when the fuse time is greater than the preset fuse time threshold, so that the low-voltage power supply module control unit controls the switch module to disconnect after a preset time according to the second control instruction.

[0118] In some embodiments, the control module 530 is also used to send a third control instruction to the low-voltage power supply module control unit after determining whether the low-voltage power supply module is normal based on the status parameter data of the low-voltage power supply module, when the low-voltage power supply module is in an abnormal state, so that the low-voltage power supply module control unit controls the switch module to disconnect according to the third control instruction.

[0119] In some embodiments, the judgment module 520 is further used to judge whether the temperature of the low-voltage power supply module is greater than a preset temperature and / or whether the power is lower than a preset power threshold;

[0120] The judgment module 520 is also used to determine that the low-voltage power supply module is in a normal state when the temperature of the low-voltage power supply module is lower than a preset temperature and / or the power level is higher than a preset power threshold; otherwise, determine that the low-voltage power supply module is in an abnormal state.

[0121] In some embodiments, the determination module 520 is further used to determine whether the pressure of the airbag is greater than a preset pressure threshold;

[0122] The judgment module 520 determines that the vehicle is in a collision state when the pressure of the airbag is greater than a preset pressure threshold.

[0123] In some embodiments, the low voltage power supply control device 500 further includes a determination module;

[0124] A determination module, used for determining the level of the abnormal working condition according to the working condition data of the vehicle before sending a first control instruction to the low-voltage power supply module control unit when the working condition of the vehicle is an abnormal working condition and the low-voltage power supply module is in a normal state;

[0125] The control module 530 is also used to send a first control instruction to the low-voltage power supply module control unit when the operating condition of the vehicle is an abnormal condition, the level of the abnormal condition is the first level and the low-voltage power supply module is in a normal state.

[0126] In some embodiments, the control module 530 is also used to send a fourth control instruction to the low-voltage power supply module control unit when the operating condition of the vehicle is an abnormal condition, the level of the abnormal condition is the second level and the low-voltage power supply module is in a normal state, so that the low-voltage power supply module control unit controls the switch module to disconnect after a preset time according to the fourth control instruction. The preset time is determined based on the fuse time of the fuse component on the power supply line and the preset overcurrent protection threshold; the second level of abnormality is higher than the first level of abnormality.

[0127] Figure 5 The various modules in the device shown can be implemented Figure 2 Each step in the above steps can achieve the corresponding technical effect, which will not be repeated here for the sake of brevity.

[0128] Figure 6 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application is shown.

[0129] The electronic device may include a processor 601 and a memory 602 storing computer program instructions.

[0130] Specifically, the processor 601 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0131] The memory 602 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 602 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 602 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 602 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 602 is a non-volatile solid-state memory.

[0132] In certain embodiments, the memory may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Thus, typically, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to one aspect of the present application.

[0133] The processor 601 implements any one of the low-voltage power supply control methods in the above embodiments by reading and executing computer program instructions stored in the memory 602 .

[0134] In one example, the electronic device may further include a communication interface 603 and a bus 610. Figure 6 As shown, the processor 601, the memory 602, and the communication interface 603 are connected via a bus 610 and communicate with each other.

[0135] The communication interface 603 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0136] Bus 610 includes hardware, software or both, and the parts of electronic equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 610 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the application considers any suitable bus or interconnection.

[0137] In addition, in combination with the low-voltage power supply control method in the above embodiment, the embodiment of the present application can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the low-voltage power supply control methods in the above embodiment is implemented.

[0138] An embodiment of the present application also provides a computer program product, including a computer program, which implements any one of the low-voltage power supply control methods in the above embodiments when the computer program is processed and executed.

[0139] In addition, the embodiment of the present application further provides a vehicle, which may include at least one of the following:

[0140] A low-voltage power supply control device as in any one of the embodiments of the second aspect;

[0141] An electronic device as in any one of the embodiments of the third aspect;

[0142] A computer-readable storage medium as in any embodiment of the fourth aspect;

[0143] The computer program product in any one of the embodiments of the fifth aspect will not be described in detail here.

[0144] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0145] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0146] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0147] The above reference is to the flowchart and / or block diagram of the method, device, equipment, storage medium and computer program product according to the embodiment of the present application. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0148] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A low voltage power supply control method, applied to a vehicle controller, characterized in that: The vehicle comprises a low-voltage power supply module and a low-voltage power supply module control unit, the low-voltage power supply module is used to supply power to a low-voltage load module, and a switch module is provided on the power supply lines of the low-voltage power supply module and the low-voltage load module; The method comprises: Acquiring the operating condition data of the vehicle and the status parameter data of the low-voltage power supply module; Determining whether the operating condition of the vehicle is an abnormal condition according to the operating condition data of the vehicle, and determining whether the low-voltage power supply module is normal according to the state parameter data of the low-voltage power supply module; When the operating condition of the vehicle is abnormal and the low-voltage power supply module is in a normal state, a first control instruction is sent to the low-voltage power supply module control unit so that the low-voltage power supply module control unit controls the switch module to remain in a closed state according to the first control instruction, so that the low-voltage power supply module can continuously supply power to the low-voltage load module.

2. The method according to claim 1, characterized in that The vehicle further includes an airbag and a power battery, and the operating condition data of the vehicle includes state parameter data of the airbag and / or state parameter data of the power battery; and determining whether the operating condition of the vehicle is an abnormal operating condition includes: Determining whether the vehicle is in a collision state according to the state parameter data of the airbag, and / or determining whether the power battery is in a thermal runaway state according to the state parameter data of the power battery; When the vehicle is in a collision state and / or the power battery is in a thermal runaway state, it is determined that the operating condition of the vehicle is an abnormal operating condition.

3. The method according to any one of claim 1, characterized in that: The power supply line is provided with a fuse component. When the working condition of the vehicle is an abnormal working condition, a control instruction is sent to the low-voltage power supply module control unit so that the low-voltage power supply module control unit controls the switch module to maintain a closed state according to the control instruction. The method further includes: obtaining a current of the power supply line; Determining whether the power supply line has an overcurrent fault according to the current; In the event of an overcurrent fault in the power supply line, comparing the fusing time of the fuse component with a preset fusing time threshold; When the fusing time is less than the preset fusing time threshold, a first control instruction is sent to the low-voltage power supply module control unit, so that the low-voltage power supply module control unit controls the switch module to remain in a closed state according to the first control instruction; When the fusing time is greater than the preset fusing time threshold, a second control instruction is sent to the low-voltage power supply module control unit, so that the low-voltage power supply module control unit controls the switch module to disconnect after a preset time according to the second control instruction.

4. The method according to claim 1, characterized in that: After judging whether the low-voltage power supply module is normal according to the state parameter data of the low-voltage power supply module, the method further includes: When the low-voltage power supply module is in an abnormal state, a third control instruction is sent to the low-voltage power supply module control unit, so that the low-voltage power supply module control unit controls the switch module to be disconnected according to the third control instruction.

5. The method according to any one of claims 1 to 4, characterized in that: The state parameter data of the low-voltage power supply module includes the temperature and / or power of the low-voltage power supply module; The determining whether the low-voltage power supply module is normal according to the status parameter data of the low-voltage power supply module includes: Determine whether the temperature of the low-voltage power supply module is greater than a preset temperature and / or whether the power is lower than a preset power threshold; When the temperature of the low-voltage power supply module is lower than a preset temperature and / or the power level is higher than a preset power threshold, it is determined that the low-voltage power supply module is in a normal state; otherwise, it is determined that the low-voltage power supply module is in an abnormal state.

6. The method according to claim 2, characterized in that The state parameter data of the airbag includes the pressure of the airbag, and judging whether the vehicle is in a collision state according to the state parameter data of the airbag includes: Determining whether the pressure of the airbag is greater than a preset pressure threshold; When the pressure of the airbag is greater than a preset pressure threshold, it is determined that the vehicle is in a collision state.

7. The method according to any one of claims 1 to 4, characterized in that: When the operating condition of the vehicle is an abnormal operating condition and the low-voltage power supply module is in a normal state, before sending a first control instruction to the low-voltage power supply module control unit, the method further includes: determining the level of the abnormal operating condition according to the operating condition data of the vehicle; When the operating condition of the vehicle is an abnormal operating condition and the low-voltage power supply module is in a normal state, sending a first control instruction to the low-voltage power supply module control unit includes: When the operating condition of the vehicle is an abnormal operating condition, the level of the abnormal operating condition is the first level, and the low-voltage power supply module is in a normal state, a first control instruction is sent to the low-voltage power supply module control unit.

8. The method according to claim 7, characterized in that After determining the level of the abnormal operating condition according to the operating condition data of the vehicle, the method further includes: When the operating condition of the vehicle is an abnormal condition, the level of the abnormal condition is the second level and the low-voltage power supply module is in a normal state, a fourth control instruction is sent to the low-voltage power supply module control unit, so that the low-voltage power supply module control unit controls the switch module to disconnect after a preset time according to the fourth control instruction, and the preset time is determined based on the fusing time of the fuse component on the power supply line and a preset overcurrent protection threshold; the second level of abnormality is higher than the first level of abnormality.

9. A low voltage power supply control device, applied to a vehicle controller, characterized in that: The vehicle comprises a low-voltage power supply module and a low-voltage power supply module control unit, the low-voltage power supply module is used to supply power to a low-voltage load module, and a switch module is provided on the power supply lines of the low-voltage power supply module and the low-voltage load module; The device comprises: An acquisition module, used to acquire the operating condition data of the vehicle and the state parameter data of the low-voltage power supply module; A judgment module, used to judge whether the working condition of the vehicle is an abnormal working condition according to the working condition data of the vehicle, and to judge whether the low-voltage power supply module is normal according to the state parameter data of the low-voltage power supply module; A control module is used to send a first control instruction to the low-voltage power supply module control unit when the operating condition of the vehicle is an abnormal condition and the low-voltage power supply module is in a normal state, so that the low-voltage power supply module control unit controls the switch module to remain in a closed state according to the first control instruction, so that the low-voltage power supply module can continuously supply power to the low-voltage load module.

10. An electronic device, characterized in that: The device comprises: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the low-voltage power supply control method according to any one of claims 1 to 8 is implemented.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by a processor, the low-voltage power supply control method according to any one of claims 1 to 8 is implemented.

12. A computer program product, characterized in that When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the low-voltage power supply control method as described in any one of claims 1 to 8.

13. A vehicle, characterized in that: Include at least one of the following: The low voltage power supply control device as claimed in claim 9; The electronic device as claimed in claim 10; The computer readable storage medium of claim 11; The computer program product of claim 12.

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