CN117962801A

CN117962801A - Method and device for controlling unlocking of vehicle, vehicle and storage medium

Info

Publication number: CN117962801A
Application number: CN202410391053.4A
Authority: CN
Inventors: 翟志欣; 王旭; 李永君; 白金彪; 任冬雷
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2024-04-02
Filing date: 2024-04-02
Publication date: 2024-05-03
Anticipated expiration: 2044-04-02
Also published as: CN117962801B

Abstract

The application provides a method, a device, a vehicle and a storage medium for controlling unlocking of a vehicle, wherein the method is applied to the vehicle, the vehicle comprises an ABM, a low-voltage main battery and a standby battery, a first control circuit is arranged in the low-voltage main battery, a second control circuit is arranged in the standby battery, and the method comprises the following steps: when the ABM receives the collision signal, a collision unlocking signal is sent to the first control circuit and the second control circuit; when the first control circuit receives the collision unlocking signal and detects that the low-voltage main battery has a short circuit fault, a closing request signal is sent to the second control circuit; when the second control circuit receives the closing request signal and the collision unlocking signal, the standby battery power supply loop is controlled to be closed, so that power is supplied to the vehicle through the standby battery to control the unlocking of the whole vehicle. According to the method, after the low-voltage main battery has a short circuit fault due to a collision accident, the standby battery supplies power for the vehicle in an auxiliary way, and the power consumption requirement of the collision unlocking of the whole vehicle is met.

Description

Method and device for controlling unlocking of vehicle, vehicle and storage medium

Technical Field

The present application relates to the field of vehicles, and more particularly, to a method, apparatus, vehicle, and storage medium for controlling unlocking of a vehicle in the field of vehicles.

Background

With the development of the automobile industry, vehicles are provided with a collision unlocking function, so that after the vehicles collide, the vehicles can be automatically controlled to be unlocked, and people in the vehicles are prevented from being trapped when collision accidents happen.

The general procedure for controlling unlocking of a vehicle is: after the vehicle receives the collision signal, a collision unlocking request is sent, and the vehicle is powered by the low-voltage lithium battery at the moment so that the vehicle can be normally unlocked. After the vehicle collides to cause short circuit fault of the low-voltage lithium battery and the power supply loop is disconnected, the built-in capacitor in the vehicle door can be discharged to unlock the vehicle door for power supply.

The mode of additionally adding the built-in capacitor is adopted to independently supply power for collision unlocking, and each vehicle door is required to be provided with the built-in capacitor, so that the realization cost of the whole vehicle unlocking under the collision accident is higher.

Disclosure of Invention

The application provides a method and a device for controlling unlocking of a vehicle, the vehicle and a storage medium.

In a first aspect, there is provided a method of controlling unlocking of a vehicle, the method being applied to a vehicle including an ABM, a low-voltage main battery in which a first control circuit is provided, and a backup battery in which a second control circuit is provided, the method comprising:

Under the condition that the ABM receives the collision signal, the ABM sends a collision unlocking signal to the first control circuit and the second control circuit;

When the first control circuit receives a collision unlocking signal and detects that the low-voltage main battery has a short circuit fault, the first control circuit sends a closing request signal to the second control circuit;

And under the condition that the second control circuit receives the closing request signal and the collision unlocking signal, the second control circuit controls the standby battery power supply loop to be closed, so that the standby battery supplies power to the vehicle to control the unlocking of the whole vehicle.

In the above technical scheme, a vehicle collision unlocking mode is provided: under the condition that an ABM in a vehicle receives a collision signal, the ABM sends a collision unlocking signal to a first control circuit of a low-voltage main battery and a second control circuit of a standby battery, the first control circuit of the low-voltage main battery receives the collision unlocking signal, and after detecting that the low-voltage main battery has a short circuit fault, the ABM sends a closing request signal to the second control circuit of the standby battery, so that the second control circuit of the standby battery can control a power supply loop to be closed to supply power to the whole vehicle after receiving the closing request signal and the collision unlocking signal, and the whole vehicle unlocking is realized. The auxiliary battery can supply power to the vehicle in an auxiliary way under the condition that the low-voltage main battery has a short circuit fault due to the collision accident, so that the power consumption requirement of the whole vehicle for collision unlocking is met, the whole vehicle is ensured to smoothly finish the collision unlocking, the personnel in the vehicle are prevented from being trapped, and the safety of the personnel in the vehicle under the collision accident is improved; in addition, compared with the mode of adding a built-in capacitor for each vehicle door to realize the whole vehicle unlocking in the related art, the application can reuse the original double-power-supply framework of the vehicle, realize the whole vehicle unlocking by adding a use scene and corresponding software control logic for the standby battery, does not need to additionally add a plurality of capacitor devices, and can reduce the realization cost of the whole vehicle unlocking under the collision accident; that is, the vehicle does not have a dual-power architecture, only one spare battery device is needed to be added, and compared with the implementation mode of a plurality of built-in capacitors, certain cost can be reduced.

With reference to the first aspect, in some possible implementations, a first protection circuit is further provided in the backup battery; in the case that the second control circuit receives the closing request signal and the collision unlocking signal, the second control circuit controls the standby battery power supply loop to be closed, including: in the case where the second control circuit receives the closing request signal and the collision unlock signal, the second control circuit controls the first protection circuit in the backup battery to switch from the open state to the closed state so that the backup battery power supply loop is controlled to be closed.

In the above technical scheme, in order to avoid the standby battery consuming electric energy under other unnecessary conditions, the standby battery is provided with the protection circuit, when the standby battery is not required to supply power, the protection circuit is in an open state, when the standby battery receives the collision unlocking signal and the closing request signal, and when the standby battery is required to supply power, the protection circuit is switched to a closed state from the open state, and the power supply loop is closed to supply power for the vehicle. The standby battery is controlled to output power by controlling the closing and opening of the protection circuit, so that the standby battery can supply power to a vehicle in a collision unlocking scene, and the power consumption requirement of vehicle unlocking under the condition of low-voltage main battery fault is ensured; and in other scenes, the power supply output is stopped, so that the consumption and waste of the electric energy in the standby battery are avoided.

With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, a second protection circuit is further disposed in the low-voltage main battery; the method further comprises the steps of: under the condition that a short circuit fault occurs in the low-voltage main battery, the first control circuit controls the second protection circuit in the low-voltage main battery to be switched from a closed state to an open state after a first preset time period; the second control circuit controls the first protection circuit in the standby battery to be switched from an open state to a closed state, and includes: the second control circuit controls the first protection circuit of the standby battery to be switched from an open state to a closed state within a first preset time period.

With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, the method further includes: under the condition that the first control circuit does not receive the collision signal and detects that the low-voltage main battery has a short circuit fault, the first control circuit controls the second protection circuit of the low-voltage main battery to be switched from the closed state to the open state after a second preset time period, and the second preset time period is smaller than the first preset time period.

In the above technical scheme, in order to avoid the power failure of the vehicle during the switching period of the output power supply, the application also provides a method for adjusting the disconnection time of the protection circuit in the low-voltage main battery, wherein the protection circuit of the low-voltage main battery is controlled to be disconnected after a first preset time period, and the standby battery is controlled to close a loop within the first preset time period to supply power to the vehicle, and the first preset time period is longer than the normal short-circuit disconnection time period of the low-voltage main battery. Therefore, before the standby battery closes the loop, the low-voltage main battery can still continue to supply power for the vehicle under the condition of short circuit fault, so that the vehicle is prevented from being powered off during switching of the output power supply, and the vehicle is further ensured to smoothly complete collision unlocking.

With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, the vehicle further includes a power supply isolator and a voltage converter, the standby battery is connected to the voltage converter through the power supply isolator, and the power supply isolator is in a normally closed state; the method further comprises the steps of: supplying power to the vehicle through the voltage converter when the vehicle is in a starting state; under the condition that the vehicle is in a dormant state, power is supplied to the vehicle through a low-voltage main battery; and under the condition that the ABM receives the collision signal and the first control circuit detects that the low-voltage main battery is not in short circuit fault, the power is supplied to the vehicle through the low-voltage main battery, so that the vehicle controls the unlocking of the whole vehicle.

In the technical scheme, the application also provides that the voltage converter supplies power to the vehicle in a starting state of the vehicle, and the low-voltage main battery supplies power to the vehicle in a dormant state of the vehicle; when the vehicle receives the collision signal and the low-voltage main battery does not have short-circuit fault, the low-voltage main battery supplies power for the vehicle. In the case that the vehicle is provided with a low-voltage main battery and a standby battery, a proper vehicle power supply mode is provided for different vehicle use scenes.

With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, the ABM sends a collision unlocking signal to the second control circuit, including: the ABM sends a collision unlocking signal of a first preset frame number to the second control circuit; in the case that the second control circuit receives the closing request signal and the collision unlocking signal, the second control circuit controls the standby battery power supply loop to be closed, including: and under the condition that the second control circuit receives the closing request signal and the collision unlocking signal of a second preset frame number, the second control circuit controls the standby battery power supply loop to be closed, and the second preset frame number is smaller than or equal to the first preset frame number.

According to the technical scheme, in order to ensure that the standby battery can timely and accurately supply power to the vehicle, the standby battery is sent with the multi-frame collision unlocking signal, and after the standby battery receives the multi-frame collision unlocking signal, the standby battery supplies power to the vehicle, so that the situation that the standby battery is not started due to communication faults can be avoided, and the smooth execution of collision unlocking is further ensured.

With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, the vehicle includes at least two backup batteries; in the event that the ABM receives the collision signal, the ABM sends a collision unlock signal to the second control circuit, comprising: under the condition that the ABM receives the collision signal, the ABM acquires battery state information of each standby battery, wherein the battery state information at least comprises the residual electric quantity of each standby battery and whether each standby battery has faults or not; the ABM determines a target battery from the standby batteries based on the battery state information, wherein the target battery is the standby battery which has no fault and has the largest residual electric quantity; the ABM sends a collision unlock signal to a second control circuit in the target battery.

In the above technical solution, in order to avoid that a single backup battery fails in a collision accident or the electric quantity is insufficient to affect the collision unlocking of the vehicle, the application further proposes that a plurality of backup batteries are configured in the vehicle, and when the backup batteries are needed to supply power, the battery state information of each backup battery is based on: the residual electric quantity information and whether the battery is faulty or not are selected from the residual electric quantity information and the fault or not, so that the power is supplied to the vehicle, the situation that the fault of the battery cannot be faulty or the battery is low in electric quantity and cannot continuously supply power can be avoided, the smooth execution of collision unlocking under a collision accident scene is further ensured, and the running safety of the vehicle is improved.

In a second aspect, there is provided an apparatus for controlling unlocking of a vehicle, the apparatus being applied to a vehicle including an ABM, a low-voltage main battery in which a first control circuit is provided, and a backup battery in which a second control circuit is provided, the apparatus comprising:

The first sending module is used for sending a collision unlocking signal to the first control circuit and the second control circuit by the ABM under the condition that the collision signal is received by the ABM;

The second sending module is used for sending a closing request signal to the second control circuit by the first control circuit when the first control circuit receives the collision unlocking signal and detects that the low-voltage main battery has a short circuit fault;

and the first control module is used for controlling the standby battery power supply loop to be closed under the condition that the second control circuit receives the closing request signal and the collision unlocking signal, so that the standby battery supplies power to the vehicle to control the unlocking of the whole vehicle.

With reference to the second aspect, in some possible implementations, a first protection circuit is further disposed in the backup battery; the first control module is further configured to: in the case where the second control circuit receives the closing request signal and the collision unlock signal, the second control circuit controls the first protection circuit in the backup battery to switch from the open state to the closed state so that the backup battery power supply loop is controlled to be closed.

With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, a second protection circuit is further disposed in the low-voltage main battery; the apparatus further comprises: the second control module is used for controlling the second protection circuit in the low-voltage main battery to be switched from the closed state to the open state after a first preset time length under the condition that the low-voltage main battery has a short circuit fault; the first control module is further configured to: the second control circuit controls the first protection circuit of the standby battery to be switched from an open state to a closed state within a first preset time period.

With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the apparatus further includes: the third control module is used for controlling the second protection circuit of the low-voltage main battery to switch from the closed state to the open state after a second preset time length, and the second preset time length is smaller than the first preset time length under the condition that the first control circuit does not receive the collision signal and detects that the low-voltage main battery has a short circuit fault.

With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the vehicle further includes a power supply isolator and a voltage converter, the standby battery is connected to the voltage converter through the power supply isolator, and the power supply isolator is in a normally closed state; the apparatus further comprises: the first power supply module is used for supplying power to the vehicle through the voltage converter under the condition that the vehicle is in a starting state; the second power supply module is used for supplying power to the vehicle through the low-voltage main battery under the condition that the vehicle is in a dormant state; and the third power supply module is used for supplying power to the vehicle through the low-voltage main battery under the condition that the ABM receives the collision signal and the first control circuit detects that the low-voltage main battery has no short circuit fault, so that the vehicle controls the whole vehicle to unlock.

With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the first sending module is further configured to: the ABM sends a collision unlocking signal of a first preset frame number to the second control circuit; the first control module is further configured to: and under the condition that the second control circuit receives the closing request signal and the collision unlocking signal of a second preset frame number, the second control circuit controls the standby battery power supply loop to be closed, and the second preset frame number is smaller than or equal to the first preset frame number.

With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the vehicle includes at least two standby batteries; the first sending module is further configured to: under the condition that the ABM receives the collision signal, the ABM acquires battery state information of each standby battery, wherein the battery state information at least comprises the residual electric quantity of each standby battery and whether each standby battery has faults or not; the ABM determines a target battery from the standby batteries based on the battery state information, wherein the target battery is the standby battery which has no fault and has the largest residual electric quantity; the ABM sends a collision unlock signal to a second control circuit in the target battery.

In a third aspect, a vehicle is provided that includes a memory and a processor. The memory is for storing executable program code and the processor is for calling and running the executable program code from the memory such that the vehicle performs the method of controlling unlocking of the vehicle in any one of the possible implementations of the above aspect.

In a fourth aspect, there is provided a computer program product comprising: computer program code which, when run on a computer, causes the computer to carry out the method of controlling unlocking of a vehicle as described in the above aspects.

In a fifth aspect, there is provided a computer readable storage medium storing computer program code which, when run on a computer, causes the computer to perform the method of controlling unlocking of a vehicle of the above aspect.

Drawings

FIG. 1 is a schematic flow chart of a method of controlling unlocking of a vehicle provided by an embodiment of the application;

FIG. 2 is a schematic diagram of a dual power architecture with redundant power supplies according to an embodiment of the present application;

FIG. 3 is a schematic flow chart of another method of controlling unlocking of a vehicle provided by an embodiment of the present application;

fig. 4 is a schematic diagram of a transmission path of a collision unlocking signal according to an exemplary embodiment of the present application;

FIG. 5 is a schematic flow chart diagram of yet another method of controlling unlocking of a vehicle provided by an embodiment of the present application;

fig. 6 is a schematic structural diagram of a device for controlling unlocking of a vehicle according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a vehicle according to an embodiment of the present application.

Detailed Description

The technical scheme of the application will be clearly and thoroughly described below with reference to the accompanying drawings. Wherein, in the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B: the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: the three cases where a exists alone, a and B exist together, and B exists alone, and furthermore, in the description of the embodiments of the present application, "plural" means two or more than two.

The terms "first," "second," and the like, are used below for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In order to avoid the situation that the personnel in the vehicle are trapped due to the fact that the vehicle cannot be unlocked after the collision accident happens, the collision unlocking function is generally configured in the vehicle, so that the collision unlocking request can be automatically triggered after the collision accident happens to control the whole vehicle to automatically unlock, and the personnel in the vehicle are prevented from being trapped. After the collision accident occurs to the vehicle, the vehicle can automatically pull down high voltage, and the low voltage lithium battery supplies power to the vehicle, so that the vehicle can complete the unlocking of the whole vehicle.

However, the collision accident may also cause short-circuit fault of the low-voltage lithium battery, and if the low-voltage lithium battery is still powered, safety accidents such as explosion of the vehicle may be caused due to overheat; therefore, when the low-voltage lithium battery is in short circuit fault due to collision accident, the control circuit of the low-voltage lithium battery can control the MOS tube to be immediately disconnected so as to prevent the temperature of the battery from rising due to short circuit; however, when the metal oxide semiconductor (Metal Oxide Semiconductor, MOS) tube is disconnected, the power output is cut off, so that the low-voltage lithium battery cannot continue to supply power to the vehicle, and the central lock of the vehicle door fails to be unlocked.

Aiming at the problem that the vehicle is failed to unlock after the short circuit of the low-voltage lithium battery is caused by the collision of the vehicle, the application provides a power supply mode through a redundant battery, and meets the power consumption requirement of unlocking the whole vehicle after the short circuit fault of the main battery (the low-voltage lithium battery). Fig. 1 is a schematic flow chart of a method for controlling unlocking of a vehicle according to an embodiment of the present application. It should be appreciated that the method may be applied in a vehicle.

Illustratively, as shown in FIG. 1, the method 100 includes:

Step 101, in the case that the ABM receives the collision signal, the ABM sends a collision unlocking signal to the first control circuit and the second control circuit.

The vehicle comprises an Air Bag controller (ABM), a low-voltage main battery and a standby battery (the standby battery can also be called as a redundant battery), wherein control circuits are arranged in the low-voltage main battery and the standby battery so as to control the low-voltage main battery and the standby battery to output power by a user; in order to distinguish the control circuits of the two, in the embodiment of the application, the low-voltage main battery is provided with a first control circuit, and the standby battery is provided with a second control circuit.

In order to avoid the problem that the whole vehicle cannot be unlocked after the short-circuit fault of the low-voltage lithium battery is caused by the vehicle collision, the redundant battery (or the standby battery) is added in the vehicle, so that the standby battery can assist in supplying power to the vehicle after the short-circuit fault of the low-voltage lithium battery, the aim that the whole vehicle can be smoothly unlocked after the collision occurs is fulfilled, and people in the vehicle are prevented from being trapped.

Fig. 2 is a schematic diagram of a dual power architecture with redundant power supplies according to an embodiment of the present application. As shown in fig. 2, the vehicle includes a low-voltage main battery 202, a voltage converter (DC-DC) 201, a power isolator 203, and a backup battery 204. The backup battery 204 may provide auxiliary power to the intelligent driving controller, the braking module, the steering module, and other modules related to the basic safety functions of the vehicle after the collision and after the failure of the low-voltage main battery 202.

Based on the dual-power architecture of fig. 2, after the ABM in the vehicle receives the collision signal sent by the collision sensor, the ABM indicates that the vehicle has a collision accident, at this time, in order to avoid the personnel in the vehicle being trapped, the ABM needs to send a collision unlocking signal to the low-voltage main battery and the standby battery, specifically, the ABM sends the collision unlocking signal to the first control circuit of the low-voltage main battery and the second control circuit of the standby battery, so that the low-voltage main battery and/or the standby battery supply power to the vehicle in the collision accident, so as to realize unlocking of the vehicle.

Alternatively, the crash signal may be triggered by a crash sensor in front of, behind or to the side of the vehicle. The collision sensor transmits a collision signal to the ABM, and the ABM transmits a collision unlocking request or a collision unlocking signal to a vehicle body domain controller (Central Electronic Module, CEM) besides transmitting the collision unlocking signal to the standby battery and the main battery after receiving the collision signal, and the vehicle body domain controller transmits the collision unlocking request or the collision unlocking signal to a vehicle door control module (Door Control Module, DCM) after receiving the collision unlocking request or the collision unlocking signal so as to control the unlocking of the whole vehicle.

Step 102, when the first control circuit receives the collision unlocking signal and detects that the low-voltage main battery has a short-circuit fault, the first control circuit sends a closing request signal to the second control circuit.

The first control circuit of the low-voltage main battery also has the function of monitoring the internal current of the battery to judge whether the low-voltage main battery has a short circuit fault or not. And when the first control circuit receives the collision unlocking signal and detects that the low-voltage main battery has a short circuit fault, the low-voltage main battery cannot continuously supply power to the vehicle, and the vehicle needs to be switched to the standby battery to supply power for assisting the vehicle in order to enable the vehicle to continuously complete collision unlocking. In order to enable the power supply loop of the standby battery to be timely closed so as to supply power to the vehicle, a closing request signal is correspondingly sent to the standby battery by the first control circuit of the low-voltage main battery, and particularly the closing request signal is sent to the second control circuit of the standby battery by the first control circuit of the low-voltage main battery so as to control the closed loop of the standby battery to supply power to the vehicle.

Optionally, under the condition that the low-voltage main battery has no short circuit fault, the low-voltage main battery can continue to perform the vehicle function, and the low-voltage main battery continues to perform the vehicle function without switching to the standby battery, so that the vehicle can control the vehicle to perform the vehicle unlocking.

Step 103, under the condition that the second control circuit receives the closing request signal and the collision unlocking signal, the second control circuit controls the standby battery power supply loop to be closed, so that power is supplied to the vehicle through the standby battery to control the unlocking of the whole vehicle.

And under the condition that the second control circuit of the standby battery receives the closing request signal and the collision unlocking signal, the second control circuit of the standby battery controls the standby battery power supply loop to be closed, so that the vehicle can be powered by the standby battery, and then the vehicle can control the whole vehicle to unlock under the condition that the standby battery supplies power to the vehicle, and the personnel in the vehicle can be prevented from being trapped. Specifically, the standby battery can supply power for a vehicle body domain controller, a vehicle door control module and other modules unlocked with the whole vehicle, so as to complete the unlocking process of the whole vehicle.

Alternatively, in the case where the low-voltage main battery resumes the power supply function, indicating that the problem caused by the vehicle collision accident has been solved, the backup battery may be disconnected from the power supply. Or in the event that it is detected by a camera or a seat sensor or the like that the person trapped in the vehicle has smoothly left the vehicle, the backup battery supply may be disconnected.

In summary, the embodiment of the application provides a vehicle collision unlocking method: under the condition that an ABM in a vehicle receives a collision signal, the ABM sends a collision unlocking signal to a first control circuit of a low-voltage main battery and a second control circuit of a standby battery, the first control circuit of the low-voltage main battery receives the collision unlocking signal, and after detecting that the low-voltage main battery has a short circuit fault, the ABM sends a closing request signal to the second control circuit of the standby battery, so that the second control circuit of the standby battery can control a power supply loop to be closed to supply power to the whole vehicle after receiving the closing request signal and the collision unlocking signal, and the whole vehicle unlocking is realized. The auxiliary power supply system has the advantages that under the condition that the low-voltage main battery has a short circuit fault due to a collision accident, the auxiliary power supply system is used for supplying power to the vehicle, the power consumption requirement of the whole vehicle collision unlocking is met, the whole vehicle is ensured to smoothly complete the collision unlocking, people in the vehicle are prevented from being trapped, and the safety of the people in the vehicle under the collision accident is improved.

The standby battery and the low-voltage main battery are lithium batteries, and a protection circuit is further arranged in the lithium batteries and is in a closed state in a battery power supply state, and the protection circuit is disconnected to provide overheat protection for the batteries in a battery short circuit state so as to avoid internal temperature rise of the batteries.

Fig. 3 is a schematic flow chart of another method for controlling unlocking of a vehicle according to an embodiment of the present application. It should be appreciated that the method may be applied in a vehicle.

Illustratively, as shown in FIG. 3, the method 300 includes:

step 301, in the case that the ABM receives the collision signal, the ABM sends a collision unlocking signal to the first control circuit and the second control circuit.

Step 302, when the first control circuit receives the collision unlocking signal and detects that the low-voltage main battery has a short-circuit fault, the first control circuit sends a closing request signal to the second control circuit.

The implementation of step 301 and step 302 may refer to step 101 and step 102, and this embodiment is not described herein.

Step 303, in the case of a short-circuit fault of the low-voltage main battery, the first control circuit controls the second protection circuit in the low-voltage main battery to switch from the closed state to the open state after a first preset time period.

The low-voltage main battery is a lithium battery, and in order to prevent the lithium battery from overheating inside the battery after a short-circuit fault, a second protection circuit is further arranged in the low-voltage main battery, and under the condition that the low-voltage main battery has the short-circuit fault, the second protection circuit of the low-voltage main battery can be controlled to be disconnected, particularly a MOS tube is disconnected, so that the temperature rise inside the battery is prevented.

Considering that the control circuit of the spare battery receives the collision unlocking signal and the closing request signal, the control power supply loop is closed to supply power to the vehicle for a certain time, and the short-circuit fault of the low-voltage main battery can be completed in a very short time, for example, 20ms, if the second protection of the low-voltage main battery is still according to the original disconnection time, the vehicle is in a power-off state in a certain time during the period of switching the power output of the low-voltage main battery to the power supply of the spare battery. In order to avoid power failure of the vehicle, the power supply of the low-voltage main battery and the power supply of the standby battery can be switched in a seamless manner, and the embodiment of the application also adjusts the disconnection time of the second protection circuit in the low-voltage main battery, so that the first control circuit of the low-voltage main battery can control the second protection circuit of the low-voltage main battery to be switched from a closed state to an open state after a first preset time, that is, the second protection circuit (MOS tube) of the low-voltage main battery is controlled to be disconnected after the first preset time, and the standby battery power supply circuit is closed and can supply power to the vehicle within the first preset time, and the low-voltage main battery still supplies power to the vehicle under the short-circuit fault when the power supply circuit of the standby battery is not closed.

The first preset duration is set to be longer than the closed time of the power supply loop of the standby battery and shorter than the safe duration of continuous power supply of the low-voltage main battery under the short circuit fault, and the safe duration is the time that the short circuit and overheating of the low-voltage main battery cannot be caused. The first preset duration may be, for example, 2s.

Optionally, if the vehicle is not in the collision unlocking scene, the opening time of the protection circuit in the low-voltage main battery does not need to be adjusted even if the low-voltage main battery has a short circuit fault. Correspondingly, when the first control circuit of the low-voltage main battery does not receive the collision unlocking signal and the first control circuit detects that the low-voltage main battery has a short circuit fault, the first control circuit controls the second protection circuit of the low-voltage main battery to switch from a closed state to an open state after a second preset time period, and the second preset time period is smaller than the first preset time period. The second preset time period is a time period during which the low-voltage main battery immediately turns off the second protection circuit, and may be, for example, 20ms. That is, before and after the short circuit fault is detected, if the first control circuit of the low-voltage main battery does not receive the collision unlocking signal, the second protection circuit can be disconnected within a short time (a second preset time period) to avoid overheating inside the battery; if a collision unlocking signal is received, the second protection circuit is disconnected after the first preset time is required to be maintained, so that the standby battery can be in seamless connection to supply power for the vehicle.

In order to further increase the success rate of transmission of the collision unlocking signal, optionally, the ABM in the vehicle may send the collision unlocking signal of the first preset number of frames to the second control circuit of the spare battery. For example, the first preset frame number may be a 6-frame collision unlock signal, or a 6-frame collision unlock message.

In step 304, in the case that the second control circuit receives the closing request signal and the collision unlocking signal, the second control circuit controls the first protection circuit in the standby battery to switch from the open state to the closed state, so that the standby battery power supply loop is controlled to be closed.

Similar to the low-voltage main battery, the standby battery can also be a lithium battery, and a first protection circuit is also configured in the corresponding standby battery; when the standby battery is not powered, the first protection circuit of the standby battery is in an off state so as to avoid waste of electric energy of the standby battery. On the contrary, after the second control circuit of the standby battery receives the collision unlocking signal and the closing request signal, the standby battery is required to supply power for the vehicle in an auxiliary mode, and at the moment, the second control circuit of the standby battery is required to control the first protection circuit of the standby battery to switch from an open state to a closed state, the power supply loop is closed, and the standby battery supplies power for the vehicle.

In order to ensure that the power of the vehicle is not interrupted while the power output is switched, after the low-voltage main battery fails in a short circuit, the corresponding second protection short circuit is disconnected after the first preset duration of power supply is maintained, and the corresponding second control circuit of the standby battery needs to control the first protection circuit of the standby battery to be switched from the disconnected state to the closed state within the first preset duration, so that the standby battery successfully supplies power to the vehicle when the power output of the low-voltage main battery is disconnected, and smooth switching of the power output is realized under the condition that the power failure is not generated.

Optionally, in order to make the standby battery clearly need to switch the power output, to avoid the power output from being switched by mistake and wasting the electric energy of the standby battery, the second control circuit of the standby battery also needs to determine that the vehicle is powered after receiving the multi-frame collision unlocking signal under the condition that the ABM sends the collision unlocking signal with the first preset frame number. That is, when the second control circuit of the standby battery receives the closing request signal and the collision unlocking signal of the second preset frame number, the second control circuit controls the standby battery power supply loop to be closed so as to supply power to the vehicle through the standby battery, and the second preset frame number is smaller than or equal to the first preset frame number. The second preset number of frames may be, for example, 5 frames.

After the first protection circuit of the standby battery is in a closed state, the power supply loop of the standby battery is closed, and the standby battery can supply power for the vehicle, so that the vehicle can continuously complete the unlocking of the whole vehicle.

When the standby battery supplies power for unlocking the whole vehicle, if the electric quantity of the standby battery is low, the unlocking of all doors in the vehicle can not be met, and the trapped user in the vehicle can be successfully escaped to the maximum extent. Under the condition that the low-voltage main battery has short circuit fault and the residual electric quantity of the standby battery is lower (lower than a preset threshold value), the vehicle body domain controller decides a target vehicle door which needs to be opened from a plurality of vehicle doors so as to send a collision unlocking signal to the vehicle door controller of the target vehicle door, so that the successful unlocking of the target vehicle door is ensured.

For the way of deciding the target door that needs to be opened: the riding position (or current position) of the trapped user is detected by an in-vehicle camera or a seat sensor, and the door with the shortest distance is selected as the target door based on the riding position and the distance between the doors.

Optionally, if the collision accident may cause an obstacle or a fault on the outside of a certain door and cannot be successfully opened, in order to avoid opening an ineffective door, a target door may be selected from the doors based on the collision direction, and the target door is a door inconsistent with the collision direction. For example, if the collision direction is left front, the target door may be right front, right rear, or the like.

Optionally, when the ABM in the vehicle receives the collision signal and the first control circuit of the low-voltage main battery detects that the low-voltage main battery has no short-circuit fault, power is still supplied to the vehicle through the low-voltage main battery, so that the vehicle controls the whole vehicle to unlock.

In order to ensure that the whole vehicle can be smoothly unlocked under a collision accident, when the low-voltage main battery does not have a short circuit fault, the vehicle power supply mode can be determined by detecting whether the low-voltage main battery meets the vehicle door unlocking requirement under the collision accident; if the low-voltage main battery is detected to be unable to meet the door unlocking requirement under the collision accident, a closing request signal is still sent to a second control circuit of the standby battery, so that the second control circuit controls a power supply loop of the standby battery to be closed, and the standby battery and the low-voltage main battery can supply power to the vehicle together to control the unlocking of the whole vehicle; otherwise, if the low-voltage main battery is detected to meet the door unlocking requirement under the collision accident, the closing request signal does not need to be sent to the second control circuit of the standby battery, and the low-voltage main battery correspondingly supplies power to the vehicle to control the unlocking of the whole vehicle.

The mode for detecting whether the low-voltage main battery meets the door unlocking requirement under the collision accident can be as follows: the method comprises the steps of comparing the residual electric quantity with a preset threshold (the preset threshold is the minimum value capable of meeting the electric energy requirement for unlocking the whole vehicle) by acquiring the residual electric quantity of the low-voltage main battery, and determining that the low-voltage main battery can meet the vehicle door unlocking requirement under a collision accident if the residual electric quantity is higher than the preset threshold; if the residual electric quantity is lower than a preset threshold value, determining that the low-voltage main battery cannot meet the vehicle door unlocking requirement under the collision accident.

Optionally, the preset threshold may be a fixed value or a dynamically adjusted value, and if the preset threshold is a dynamically adjusted value, the preset threshold may be dynamically determined by the number of doors of the target door that needs to be unlocked by the current vehicle, where the greater the number of doors, the longer the corresponding signal transmission path, and the greater the required electric energy consumption; for example, the corresponding relation between the number of different vehicle doors and different candidate thresholds is preset, and the corresponding preset threshold is selected from the candidate thresholds according to the number of the vehicle doors of the current vehicle in the actual application process; or a basic threshold value is preset, if the number of the doors of the current vehicle is large, in order to ensure that each door can be smoothly unlocked, a preset value is dynamically increased on the basic threshold value correspondingly.

The target door can be all doors in the vehicle, and can also be part of doors in the vehicle, wherein the part of doors are determined by the riding position of trapped people in the vehicle, and the part of doors are closest to the riding position of the trapped people; or a portion of the doors may also be determined based on the crash orientation, the portion of the doors are doors that do not coincide with the crash orientation. For example, if the collision direction is left front, then part of the doors may be right front, right rear, etc.

Optionally, the preset threshold may also be dynamically determined by the number of users trapped in the current vehicle. The preset threshold value and the number of users are in positive correlation. Or a basic threshold value is preset, if the number of users of the current vehicle is large, the trapped users in the vehicle can escape in time, and a preset value is dynamically increased on the basic threshold value correspondingly.

Optionally, the manner for detecting whether the low-voltage main battery meets the door unlocking requirement in the event of a collision may be: determining the first door quantity of the low-voltage main battery for unlocking according to the residual electric quantity, and determining the second door quantity required to be unlocked according to the riding position of the trapped user in the vehicle; if the number of the first doors is larger than that of the second doors, determining that the low-voltage main battery can meet the door unlocking requirement under the collision accident; if the second number of doors is less than the second number of doors, it is determined that the low voltage primary battery is unable to meet the door unlocking requirement in the event of a collision.

Wherein, according to the riding position of the trapped user in the vehicle, determining the second door number to be unlocked specifically may include: and determining the target door to be unlocked according to the riding position of the trapped user in the vehicle, and further determining the second door number of the target door. For example, if the riding positions of the trapped users in the vehicle are the driver seat and the assistant driver seat, determining the target vehicle door to be unlocked as a left front door and a right front door; if the riding positions of the trapped users in the vehicle are the positions of the driver seat and the rear row, the target vehicle door which needs to be unlocked is determined to be a left front door and a left rear door.

When the low-voltage main battery and the backup battery are both closed, the power supply circuit is configured such that the power output side is the higher one of the low-voltage main battery and the backup battery.

Optionally, in other possible embodiments, after the ABM receives the collision signal, the ABM directly sends a collision unlocking signal to the standby battery and the low-voltage main battery, and after the standby battery receives the collision unlocking signal, the second control circuit controls the power supply loop of the standby battery to be closed; at the moment, if the low-voltage main battery has a short circuit fault, the standby battery supplies power to the whole vehicle to control unlocking of the whole vehicle; if the low-voltage main battery does not have a short circuit fault, the whole vehicle is powered by the party with high voltage according to the voltages of the low-voltage main battery and the standby battery so as to control unlocking of the whole vehicle.

Fig. 4 is a schematic diagram of a transmission path of a collision unlocking signal according to an exemplary embodiment of the present application. As shown in fig. 4, the collision sensor transmits a collision signal to an airbag control module (ABM) 401, and the airbag control module 401 transmits a collision unlock signal to a vehicle body domain Controller (CEM) 402; at the same time, the airbag control module 401 sends a crash unlock signal to the low voltage main battery, the Power isolator (Power INTERFACE SYSTEMS, PIS) 203, and the backup battery 204; when a short circuit fault occurs in the low-voltage main battery, a closing request signal is sent to the standby battery, so that the standby battery 204 controls a power supply loop to be closed after receiving a collision unlocking signal and the closing request signal, and power is supplied to a vehicle body domain Controller (CEM) 402, so that the vehicle body domain Controller (CEM) 402 transmits the collision unlocking signal to a vehicle Door Control Module (DCM) 403, and further the door lock 404 is controlled to be unlocked.

As shown in fig. 2, the vehicle further includes a power supply isolator 203 and a voltage converter (DC-DC) 201, and the backup battery 204 is connected to the voltage converter (DC-DC) 201 through the power supply isolator 203, and the power supply isolator 203 is in a normally closed state (the power supply isolator 203 is essentially a switch). Since the power isolator 203 is in a normally closed state, the vehicle is supplied with power by the voltage converter (DC-DC) 201 in a case where the vehicle is in a starting state (and no collision event occurs), the power supply line includes two: DC-DC 201-power isolator 203-backup battery 204-steering, braking or intelligent drive controller-DC 201-low voltage main battery 202-cabin fuse box, instrument fuse box, cabin fuse box, and other in-vehicle powered devices (not shown in fig. 2); that is, in the starting state of the vehicle, the in-vehicle devices are each provided with two power supply lines; in the case where the vehicle is in a dormant state (when the vehicle is under high voltage), other consumers of the vehicle are supplied with power by the low-voltage main battery 202.

In this embodiment, in order to avoid that the standby battery consumes electric energy under other unnecessary conditions, a protection circuit is provided in the standby battery, when the standby battery is not required to supply power, the protection circuit is in an open state, when the standby battery receives a collision unlocking signal and a closing request signal, and when the standby battery is required to supply power, the protection circuit is switched to a closed state from the open state, and a power supply loop is closed to supply power to the vehicle. The standby battery is controlled to output power by controlling the closing and opening of the protection circuit, so that the standby battery can supply power to a vehicle in a collision unlocking scene, and the power consumption requirement of vehicle unlocking under the condition of low-voltage main battery fault is ensured; and in other scenes, the power supply output is stopped, so that the consumption and waste of the electric energy in the standby battery are avoided. In order to avoid the power failure of the vehicle during the switching of the output power supply, the application also provides a method for adjusting the disconnection time of the protection circuit in the low-voltage main battery, wherein the protection circuit of the low-voltage main battery is controlled to be disconnected after a first preset time period, and the standby battery is controlled to be closed in the first preset time period to supply power to the vehicle, and the first preset time period is longer than the normal short circuit disconnection time period of the low-voltage main battery. Therefore, before the standby battery closes the loop, the low-voltage main battery can still continue to supply power for the vehicle under the condition of short circuit fault, so that the vehicle is prevented from being powered off during switching of the output power supply, and the vehicle is further ensured to smoothly complete collision unlocking.

In addition, the application also provides that the voltage converter supplies power to the vehicle in a starting state of the vehicle, and the low-voltage main battery supplies power to the vehicle in a dormant state of the vehicle; when the vehicle receives the collision signal and the low-voltage main battery does not have short-circuit fault, the low-voltage main battery supplies power for the vehicle. In the case that the vehicle is provided with a low-voltage main battery and a standby battery, a proper vehicle power supply mode is provided for different vehicle use scenes.

In addition, in order to ensure that the standby battery can timely and accurately supply power to the vehicle, a multi-frame collision unlocking signal is sent to the standby battery, and after the standby battery receives the multi-frame collision unlocking signal, the standby battery supplies power to the vehicle, so that the situation that the standby battery is not started due to communication faults can be avoided, and the smooth execution of collision unlocking is further ensured.

When the standby battery is needed to supply power under the collision accident, the standby battery may have a fault and cannot supply power, or the electric quantity of the standby battery is insufficient, and the like, and the unlocking failure of the whole vehicle can be caused. In order to further ensure that the whole vehicle is smoothly unlocked in a collision accident, a plurality of standby batteries can be configured for the vehicle, so that the most suitable standby battery is selected for power supply when the standby battery is required for power supply.

Fig. 5 is a schematic flow chart of yet another method of controlling unlocking of a vehicle provided by an embodiment of the present application. It should be appreciated that the method may be applied in a vehicle.

Illustratively, as shown in FIG. 5, the method 500 includes:

In step 501, in the case that the ABM receives the collision signal, the ABM obtains battery status information of each of the backup batteries, where the battery status information includes at least a remaining power of each of the backup batteries, and whether each of the backup batteries has a fault.

Wherein at least two backup batteries are arranged in the vehicle. If the low-voltage main battery has a short circuit fault in the collision accident, the ABM may acquire battery state information of each spare battery, for example, information such as a remaining power of each spare battery, whether each spare battery has a fault, and the like; it is further determined which battery backup is used to assist in powering the vehicle to determine which battery backup is to be sent the crash unlock signal.

Step 502, the abm determines a target battery from the respective backup batteries based on the battery state information, the target battery being the backup battery having no fault and the maximum remaining power.

In order to ensure that the standby battery can smoothly supply power to the vehicle, and the vehicle can realize the unlocking of the whole vehicle. The vehicle further selects, based on the battery state information, a battery cell having no failure and the largest remaining capacity from among the respective battery cells, as a battery cell that ultimately supplies power to the vehicle, that is, a target battery.

By way of example, if the backup battery 1, the backup battery 2, and the backup battery 3 are provided in the vehicle, the remaining capacity of the backup battery 1 is 40%, the remaining capacity of the backup battery 2 is 70%, and the remaining capacity of the backup battery 3 is 80%; when the backup battery 3 fails in a collision accident and the backup battery 1 and the backup battery 2 do not fail, the backup battery 2 is used as a target battery, and the backup battery 2 supplies power to the vehicle.

At step 503, the abm sends a crash unlock signal to the first control circuit and a second control circuit in the target battery.

After determining the target battery, the ABM may send a collision unlocking signal to a second control circuit of the target battery, so that the second control circuit controls the target battery to close the protection circuit after receiving the collision unlocking signal and the closing request signal, and supplies power to the vehicle.

In step 504, when the first control circuit receives the collision unlocking signal and detects that the low-voltage main battery has a short-circuit fault, the first control circuit sends a closing request signal to the second control circuit.

In step 505, when the second control circuit receives the closing request signal and the collision unlocking signal, the second control circuit controls the standby battery power supply loop to be closed, so that power is supplied to the vehicle through the standby battery to control the unlocking of the whole vehicle.

The implementation of step 504 and step 505 may refer to the above embodiments, and this embodiment is not described herein.

In this embodiment, in order to avoid that a single spare battery fails in a collision accident or the electric quantity is insufficient to affect the collision unlocking of the vehicle, the application also proposes that a plurality of spare batteries are configured in the vehicle, and when the spare batteries are needed to supply power, the battery state information of each spare battery is based on: the residual electric quantity information and whether the battery is faulty or not are selected from the residual electric quantity information and the fault or not, so that the power is supplied to the vehicle, the situation that the fault of the battery cannot be faulty or the battery is low in electric quantity and cannot continuously supply power can be avoided, the smooth execution of collision unlocking under a collision accident scene is further ensured, and the running safety of the vehicle is improved.

Fig. 6 is a schematic structural diagram of a device for controlling unlocking of a vehicle, which is provided in an embodiment of the present application, and is applied to a vehicle, where the vehicle includes an ABM, a low-voltage main battery, and a backup battery, the low-voltage main battery is provided with a first control circuit, and the backup battery is provided with a second control circuit.

Illustratively, as shown in FIG. 6, the apparatus 600 includes:

a first transmitting module 601, configured to transmit a collision unlocking signal to the first control circuit and the second control circuit when the ABM receives the collision signal;

The second sending module 602 is configured to send a closing request signal to the second control circuit when the first control circuit receives the collision unlocking signal and detects that the low-voltage main battery has a short-circuit fault;

The first control module 603 is configured to, when the second control circuit receives the closing request signal and the collision unlocking signal, control the standby battery to close the power supply loop, so that the standby battery supplies power to the vehicle to control unlocking of the whole vehicle. In a possible implementation manner, a first protection circuit is further arranged in the standby battery; the first control module 603 is further configured to: in the case where the second control circuit receives the closing request signal and the collision unlock signal, the second control circuit controls the first protection circuit in the backup battery to switch from the open state to the closed state so that the backup battery power supply loop is controlled to be closed.

In a possible implementation manner, a second protection circuit is further arranged in the low-voltage main battery; the apparatus further comprises: the second control module is used for controlling the second protection circuit in the low-voltage main battery to be switched from the closed state to the open state after a first preset time length under the condition that the low-voltage main battery has a short circuit fault; the first control module 603 is further configured to: the second control circuit controls the first protection circuit of the standby battery to be switched from an open state to a closed state within a first preset time period.

In a possible implementation manner, the apparatus further includes: the third control module is used for controlling the second protection circuit of the low-voltage main battery to switch from the closed state to the open state after a second preset time length, and the second preset time length is smaller than the first preset time length under the condition that the first control circuit does not receive the collision signal and detects that the low-voltage main battery has a short circuit fault.

In a possible implementation manner, the vehicle further comprises a power isolator and a voltage converter, the standby battery is connected with the voltage converter through the power isolator, and the power isolator is in a normally closed state; the apparatus further comprises: the first power supply module is used for supplying power to the vehicle through the voltage converter under the condition that the vehicle is in a starting state; the second power supply module is used for supplying power to the vehicle through the low-voltage main battery under the condition that the vehicle is in a dormant state; and the third power supply module is used for supplying power to the vehicle through the low-voltage main battery under the condition that the ABM receives the collision signal and the first control circuit detects that the low-voltage main battery has no short circuit fault, so that the vehicle controls the whole vehicle to unlock.

In a possible implementation manner, the first sending module 601 is further configured to: the ABM sends a collision unlocking signal of a first preset frame number to the second control circuit; the first control module 603 is further configured to: and under the condition that the second control circuit receives the closing request signal and the collision unlocking signal of a second preset frame number, the second control circuit controls the standby battery power supply loop to be closed, and the second preset frame number is smaller than or equal to the first preset frame number.

In one possible implementation, the vehicle includes at least two backup batteries therein; the first sending module 601 is further configured to: under the condition that the ABM receives the collision signal, the ABM acquires battery state information of each standby battery, wherein the battery state information at least comprises the residual electric quantity of each standby battery and whether each standby battery has faults or not; the ABM determines a target battery from the standby batteries based on the battery state information, wherein the target battery is the standby battery which has no fault and has the largest residual electric quantity; the ABM sends a collision unlock signal to a second control circuit in the target battery.

Illustratively, as shown in FIG. 7, the vehicle 700 includes: a memory 701 and a processor 702, wherein the memory 701 stores executable program code 703, and the processor 702 is configured to call and execute the executable program code 703 to perform the method of controlling unlocking of a vehicle in the above embodiment.

In addition, the embodiment of the application also protects a device, which can comprise a memory and a processor, wherein executable program codes are stored in the memory, and the processor is used for calling and executing the executable program codes to execute the method for controlling the unlocking of the vehicle.

In this embodiment, the functional modules of the apparatus may be divided according to the above method example, for example, each functional module may be corresponding to one processing module, or two or more functions may be integrated into one processing module, where the integrated modules may be implemented in a hardware form. It should be noted that, in this embodiment, the division of the modules is schematic, only one logic function is divided, and another division manner may be implemented in actual implementation.

In the case of dividing the respective function modules by the respective functions, the apparatus may further include a first transmission module, a second transmission module, a first control module, and the like. It should be noted that, all relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.

It should be understood that the apparatus provided in this embodiment is used to perform the above-described method for controlling unlocking of a vehicle, and thus the same effects as those of the above-described implementation method can be achieved.

In addition, the device provided by the embodiment of the application can be a chip, a component or a module, wherein the chip can comprise a processor and a memory which are connected; the memory is used for storing instructions, and when the processor calls and executes the instructions, the chip can be caused to execute the method for controlling unlocking of the vehicle provided by the embodiment.

The present embodiment also provides a computer-readable storage medium having stored therein computer program code which, when run on a computer, causes the computer to perform the above-described related method steps to implement a method for controlling unlocking of a vehicle provided by the above-described embodiments.

The present embodiment also provides a computer program product which, when run on a computer, causes the computer to perform the above-mentioned related steps to implement a method of controlling unlocking of a vehicle provided by the above-mentioned embodiments.

The apparatus, the computer readable storage medium, the computer program product, or the chip provided in this embodiment are used to execute the corresponding method provided above, and therefore, the advantages achieved by the apparatus, the computer readable storage medium, the computer program product, or the chip can refer to the advantages of the corresponding method provided above, which are not described herein.

It will be appreciated by those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. A method of controlling unlocking of a vehicle, the method being applied to a vehicle including an ABM, a low-voltage main battery having a first control circuit disposed therein, and a backup battery having a second control circuit disposed therein, the method comprising:

In the case that the ABM receives a collision signal, the ABM transmits a collision unlocking signal to the first control circuit and the second control circuit;

when the first control circuit receives the collision unlocking signal and detects that the low-voltage main battery has a short circuit fault, the first control circuit sends a closing request signal to the second control circuit;

And under the condition that the second control circuit receives the closing request signal and the collision unlocking signal, the second control circuit controls the standby battery power supply loop to be closed so that power is supplied to the vehicle through the standby battery to control the unlocking of the whole vehicle.

2. The method of claim 1, wherein a first protection circuit is further provided in the backup battery;

And when the second control circuit receives the closing request signal and the collision unlocking signal, the second control circuit controls the standby battery power supply loop to be closed, and the method comprises the following steps:

In the case where the second control circuit receives the closing request signal and the collision unlocking signal, the second control circuit controls the first protection circuit in the backup battery to switch from an open state to a closed state, so that the backup battery is controlled to close the power supply loop.

3. The method of claim 2, wherein a second protection circuit is further provided in the low voltage main battery;

The method further comprises the steps of:

Under the condition that the low-voltage main battery has a short circuit fault, the first control circuit controls the second protection circuit in the low-voltage main battery to be switched from the closed state to the open state after a first preset time period;

the second control circuit controls the first protection circuit in the backup battery to switch from an open state to a closed state, including:

The second control circuit controls the first protection circuit of the standby battery to switch from the open state to the closed state within the first preset duration.

4. A method according to claim 3, characterized in that the method further comprises:

And under the condition that the first control circuit does not receive the collision signal and the short-circuit fault of the low-voltage main battery is detected, the first control circuit controls the second protection circuit of the low-voltage main battery to switch from the closed state to the open state after a second preset time period, and the second preset time period is smaller than the first preset time period.

5. The method of any one of claims 1 to 4, further comprising a power isolator and a voltage converter in the vehicle, wherein the backup battery is connected to the voltage converter through the power isolator, and wherein the power isolator is in a normally closed state;

The method further comprises the steps of:

supplying power to the vehicle through the voltage converter when the vehicle is in a start state;

Supplying power to the vehicle through the low-voltage main battery in a state where the vehicle is in a sleep state;

and under the condition that the ABM receives the collision signal and the first control circuit detects that the low-voltage main battery does not have a short circuit fault, the vehicle is powered by the low-voltage main battery, so that the vehicle controls the whole vehicle to unlock.

6. The method of any one of claims 1 to 4, wherein the ABM sends a collision unlock signal to the second control circuit, comprising:

the ABM sends the collision unlocking signal of a first preset frame number to the second control circuit;

And under the condition that the second control circuit receives the closing request signal and the collision unlocking signal with a second preset frame number, the second control circuit controls the standby battery to close the power supply loop, and the second preset frame number is smaller than or equal to the first preset frame number.

7. The method of any one of claims 1 to 4, wherein at least two of the backup batteries are included in the vehicle;

And in the case that the ABM receives the collision signal, the ABM sends a collision unlocking signal to the second control circuit, including:

in the case that the ABM receives the collision signal, the ABM acquires battery state information of each standby battery, wherein the battery state information at least comprises the residual electric quantity of each standby battery, and whether each standby battery has a fault or not;

The ABM determines a target battery, which is a backup battery having no fault and the maximum remaining power, from among the respective backup batteries based on the battery state information;

The ABM sends the collision unlock signal to the second control circuit in the target battery.

8. An apparatus for controlling unlocking of a vehicle, the apparatus being applied to the vehicle, the vehicle including an ABM, a low-voltage main battery, and a backup battery, the low-voltage main battery having a first control circuit disposed therein, and the backup battery having a second control circuit disposed therein, the apparatus comprising:

9. A vehicle, characterized in that the vehicle comprises:

a memory for storing executable program code;

A processor for calling and running the executable program code from the memory to cause the vehicle to perform the method of controlling vehicle unlocking as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed, implements the method of controlling unlocking of a vehicle according to any one of claims 1 to 7.