A mode switching method, device and vehicle

Abstract

The present invention discloses a mode switching method, a device and a car, and relates to the field of vehicle control. The method comprises: receiving a signal generated when the car is in the ON gear; judging whether the current state of the car meets the condition of maintaining the low-voltage power supply mode of the battery; when the current state meets the condition of maintaining the low-voltage power supply mode of the battery, controlling the car to maintain the low-voltage power supply mode of the battery; when the current state does not meet the condition of maintaining the low-voltage power supply mode of the battery, controlling the car to perform a high-voltage connection mode. The present invention adds an ON gear low-voltage calibration quantity to the car control logic, and can quickly realize the car maintaining the low-voltage power supply mode of the battery without changing the hardware structure or circuit structure, thereby improving the work efficiency of the staff. At the same time, because there is no need to change the structure, it also avoids problems such as loose components and poor contact.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control, and in particular to a mode switching method, a mode switching device and a vehicle. Background Art

[0002] At present, many electric vehicles, especially pure electric passenger vehicles, adopt the strategy of high voltage connection when the vehicle is in the ON gear, in order to reduce the driver's operation and avoid the situation of low-voltage battery feeding. However, during the development or debugging of electric vehicles, many test items need to be carried out in the mode of low-voltage battery power supply.

[0003] However, at present, since the car is directly connected to high voltage when it is in the ON position, it is impossible to maintain the low-voltage power supply mode of the battery in the ON position, which makes it impossible for the car to perform some tests that can only be performed in the low-voltage power supply mode. Summary of the invention

[0004] In view of the above problems, the present invention provides a mode switching method, device and a car, which can arbitrarily switch the car to a high-voltage connection or a battery low-voltage power supply mode when the car is in the ON gear.

[0005] A first aspect of an embodiment of the present invention provides a mode switching method, the method comprising:

[0006] Receive the signal generated when the car is in the ON position;

[0007] Determining whether the current state of the vehicle satisfies the condition of maintaining the battery low-voltage power supply mode;

[0008] When the current state satisfies the condition of maintaining the battery low-voltage power supply mode, controlling the vehicle to maintain the battery low-voltage power supply mode;

[0009] When the current state does not satisfy the condition of maintaining the low-voltage power supply mode of the battery, controlling the vehicle to enter a high-voltage connection mode, wherein the high-voltage connection mode is a high-voltage power battery power supply mode;

[0010] Among them, the condition for maintaining the low-voltage mode at least includes: the ON gear low-voltage calibration amount is a first preset value, and the ON gear low-voltage calibration amount is used to determine whether the vehicle is connected to high voltage or maintains the battery low-voltage power supply mode.

[0011] Optionally, before determining whether the current state of the vehicle satisfies the condition for maintaining the battery low-voltage power supply mode, the method further includes:

[0012] Determining whether each controller of the vehicle is activated and each controller starts to perform a low voltage self-test;

[0013] When each controller is activated and starts to perform low-voltage self-test, the step of determining whether the current state of the vehicle satisfies the condition of maintaining the battery low-voltage power supply mode is performed.

[0014] Optionally, when the current state satisfies the condition for maintaining the battery low-voltage power supply mode, controlling the vehicle to maintain the battery low-voltage power supply mode includes:

[0015] When the current state satisfies the requirement of maintaining the battery low voltage power supply mode, determining whether the vehicle is still in the ON gear;

[0016] When the vehicle is still in the ON gear, controlling the vehicle to maintain a battery low voltage power supply mode;

[0017] The method further comprises:

[0018] When the automobile is not currently in the ON gear, each controller is controlled to enter a dormant state.

[0019] Optionally, when the current state is not satisfied, controlling the vehicle to enter a high voltage connection mode includes:

[0020] When the ON gear low-voltage calibration amount is a second preset value, the vehicle is controlled to enter a high-voltage connection mode.

[0021] Optionally, the ON gear low voltage calibration amount is modified by a calibration tool, which defaults to the second preset value; before receiving the signal generated when the car is in the ON gear, it also includes:

[0022] In the case where it is necessary to control the automobile to maintain the low-pressure mode, modifying the ON gear low-pressure calibration amount to the first preset value through the calibration tool;

[0023] Control the vehicle to be powered on again after being powered off, and execute the steps of: receiving a signal generated when the vehicle is in the ON gear.

[0024] Optionally, the ON gear low pressure calibration amount is fixedly set to the second preset value after the automobile leaves the factory;

[0025] The ON gear low pressure calibration amount is modified to the first preset value when the automobile is under development and debugging.

[0026] A second aspect of an embodiment of the present invention provides a mode switching device, the device comprising:

[0027] A signal receiving device, used to receive a signal generated when the car is in the ON gear;

[0028] A judgment condition module, used to judge whether the current state of the vehicle meets the condition of maintaining the battery low voltage power supply mode;

[0029] A low voltage maintaining module, used for controlling the vehicle to maintain the battery low voltage power supply mode when the current state satisfies the condition of maintaining the battery low voltage power supply mode;

[0030] A high-voltage connection module, used for controlling the vehicle to enter a high-voltage connection mode when the current state does not satisfy the condition of maintaining the low-voltage power supply mode of the battery, wherein the high-voltage connection mode is a high-voltage power battery power supply mode;

[0031] Among them, the condition for maintaining the low-voltage mode at least includes: the ON gear low-voltage calibration amount is a first preset value, and the ON gear low-voltage calibration amount is used to determine whether the vehicle is connected to high voltage or maintains the battery low-voltage power supply mode.

[0032] Optionally, the device further comprises:

[0033] Activating a self-test module, used to determine whether each controller of the vehicle is activated, and each controller starts to perform a low-voltage self-test;

[0034] The execution module is used to execute the step of determining whether the current state of the vehicle meets the conditions for maintaining the low-voltage power supply mode of the battery when each controller is activated and starts to perform a low-voltage self-test.

[0035] Optionally, the low voltage maintaining module is specifically used to: when the current state satisfies the low voltage power supply mode of the battery, determine whether the vehicle is still in the ON gear;

[0036] When the vehicle is still in the ON gear, controlling the vehicle to maintain a battery low voltage power supply mode;

[0037] The device also includes:

[0038] The sleep module is used to control each controller to enter a sleep state when the vehicle is not currently in the ON gear.

[0039] Optionally, when the current state is not satisfied, the high voltage connection module is specifically used to:

[0040] When the ON gear low-voltage calibration amount is a second preset value, the vehicle is controlled to enter a high-voltage connection mode.

[0041] Optionally, the ON gear low-voltage calibration amount is modified by a calibration tool, and the second preset value is defaulted; the device further includes:

[0042] a modification module, configured to modify the ON gear low voltage calibration amount to the first preset value through the calibration tool when it is necessary to control the automobile to maintain the battery low voltage power supply mode;

[0043] The power-on module is used to control the vehicle to power on again after being powered off, and executes the steps of: receiving a signal generated when the vehicle is in the ON gear.

[0044] A third aspect of an embodiment of the present invention provides a vehicle, the vehicle comprising: a vehicle controller;

[0045] The vehicle controller is used to execute any method described in the first aspect.

[0046] The mode switching method of the present invention, after receiving the signal generated when the car is in the ON gear, determines whether the current state of the car meets the conditions for maintaining the low-voltage power supply mode of the battery; the so-called ON gear low-voltage calibration quantity is used to determine whether the car is connected to a high voltage or maintained in the low-voltage power supply mode of the battery. When the low-voltage calibration quantity in the ON gear is a first preset value, the car is controlled to maintain the low-voltage power supply mode of the battery. In this way, the car can be maintained in the low-voltage power supply mode of the battery when it is in the ON gear, so that the staff can carry out the development and debugging of the car. When the low-voltage calibration quantity in the ON gear is not the first preset value, the car is controlled to be in the high-voltage connection mode, and the high-voltage power battery directly powers the car.

[0047] The mode switching method of the present invention adds an ON gear low-voltage calibration amount to the automobile control logic, and controls whether the automobile is in the ON gear to perform a high-voltage connection or maintain a battery low-voltage power supply mode according to the ON gear low-voltage calibration amount, thereby realizing arbitrary switching of modes when the automobile is in the ON gear. When development or debugging is required, there is no need to change the hardware structure or circuit structure, and only the ON gear low-voltage calibration amount is changed to simply and quickly realize that the automobile maintains a battery low-voltage power supply mode, thereby improving the work efficiency of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0049] Figure 1 is a flow chart of a mode switching method according to an embodiment of the present invention;

[0050] Figure 2 This is one of the flow charts of mode switching in an embodiment of the present invention;

[0051] Figure 3The present invention is a block diagram of a mode switching device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is 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 used to explain the present invention, are only part of the embodiments of the present invention, not all of the embodiments, and are not used to limit the present invention.

[0053] The inventors found that many test items in the current development or debugging process of electric vehicles need to be performed in the low-voltage power supply mode provided by the battery. However, since the car is currently directly connected to the high voltage when it is in the ON gear, it is impossible to maintain the low-voltage power supply mode of the battery in the ON gear, which makes it impossible for the car to perform some tests that can only be performed in the low-voltage power supply mode.

[0054] The inventors further discovered that the current solution to this problem is to change the hardware structure, for example, when the car is in the ON gear, change the connection structure of the high-voltage power battery to put it in a faulty state; or change the circuit structure, for example, change the circuit structure of the DCDC so that the high-voltage power battery cannot power the car.

[0055] However, the above method is complicated to implement and needs to be changed every time debugging is performed. After debugging, the original structure needs to be restored, which not only causes low work efficiency of the staff, but also too many structural changes may cause problems such as loose components and poor contact.

[0056] In view of the above problems, the inventor creatively proposed a mode switching method of the present invention, which is described in detail below.

[0057] Reference Figure 1 , shows a flow chart of a mode switching method according to an embodiment of the present invention, the mode switching method comprising:

[0058] Step 101: Receive a signal generated when the car is in the ON gear.

[0059] In the embodiment of the present invention, the vehicle controller (VCU) can receive a signal generated when the car is in the ON gear. Generally, the car can be in the ON gear when the socket key is turned to the "ON" gear or the one-button start switch is pressed without stepping on the clutch. When the car is in the ON gear, a signal is generated and sent to the VCU. After receiving the signal, the VCU performs subsequent operations according to the established process.

[0060] Step 102: Determine whether the current state of the vehicle satisfies the condition of maintaining the battery low voltage power supply mode.

[0061] In the embodiment of the present invention, after the VCU receives the signal generated when the car is in the ON gear, it starts to determine whether the current state of the car meets the conditions for maintaining the battery low voltage power supply mode. The conditions for maintaining the low voltage mode at least include: the ON gear low voltage calibration amount is a first preset value, and the ON gear low voltage calibration amount is used to determine whether the car is connected to high voltage or maintains the battery low voltage power supply mode.

[0062] In the embodiment of the present invention, an ON gear low voltage calibration quantity is added to the control logic of the automobile, and the state of the automobile is controlled according to the value of the ON gear low voltage calibration quantity and other conditions. The other conditions include: whether the high voltage relay is disconnected, whether the low voltage self-test of each controller of the automobile is completed, and whether the vehicle mode variable is the driving mode.

[0063] Among them, the high-voltage relay is connected to the high-voltage power battery. When the high-voltage relay is closed, the power of the high-voltage power battery will be directly provided to the car, which is not allowed when the car is in the ON gear. Therefore, if the VCU determines that the high-voltage relay is not disconnected, it will directly determine that the car is in a fault state, and it will issue an alarm and prohibit the car from entering the high-voltage connection, and also prohibit the car from maintaining the battery low-voltage power supply mode. Whether the vehicle mode variable is the driving mode refers to whether the car is in the ON gear. If the car is in the ON gear, the vehicle mode changes to the driving mode. If the car is not in the ON gear, the vehicle mode changes to the non-driving mode.

[0064] Generally, after the car is in the ON gear, each controller needs to be activated and perform a low-voltage self-test first. That is, before determining whether the current state of the car meets the conditions for maintaining the battery low-voltage power supply mode, each controller of the car needs to be activated and start a low-voltage self-test. The steps include:

[0065] Step S1: Determine whether each controller of the vehicle is activated, and each controller starts to perform low voltage self-test.

[0066] In the embodiment of the present invention, after the socket key is turned to the "ON" position, or the one-button start switch is pressed without stepping on the clutch, the car's power storage will provide low-voltage electricity to various controllers (for example: battery management system BMS, body electronic stability system ESP, etc.), so that each controller is activated. After each controller is activated, it will first perform a self-check. If the self-check is completed, it means that each controller is normal. If the self-check is not completed, it means that one or several controllers are abnormal. In this state, the car is also considered to be in a fault state, an alarm is issued, and the car is prohibited from entering high-voltage connection, and the car is also prohibited from maintaining the battery low-voltage power supply mode.

[0067] Step S3: When each controller is activated and starts to perform low-voltage self-test, execute step: determine whether the current state of the vehicle meets the conditions for maintaining the battery low-voltage power supply mode.

[0068] In the embodiment of the present invention, each controller of the automobile is activated and starts to perform low-voltage self-test, and each controller executes its own low-voltage self-test program. In this case, the VCU will execute the steps of: determining whether the current state of the automobile meets the conditions for maintaining the battery low-voltage power supply mode.

[0069] Step 103: When the current state satisfies the conditions for maintaining the battery low-voltage power supply mode, the vehicle is controlled to maintain the battery low-voltage power supply mode.

[0070] In an embodiment of the present invention, the VCU determines whether the current state of the car meets the conditions for maintaining the low-voltage power supply mode of the battery, that is, the VCU determines whether the high-voltage relay of the car is disconnected, whether each controller has completed the low-voltage self-test, whether the vehicle mode variable is the driving mode, and whether the low-voltage calibration quantity of the ON gear is the first preset value. When the high-voltage relay of the car is disconnected, each controller has completed the low-voltage self-test, the vehicle mode variable is the driving mode, and the low-voltage calibration quantity of the ON gear is the first preset value, the car is controlled to maintain the low-voltage power supply mode of the battery, and the battery is used to provide low voltage for the car without high-voltage connection. It can be understood that, as mentioned above, if the VCU determines that the high-voltage relay of the car is not disconnected, or each controller has not completed the low-voltage self-test, then it is directly determined that the car is in a fault state, and the VCU will issue an alarm to prompt, and at the same time prohibit the car from entering the high-voltage connection, and prohibit the car from maintaining the low-voltage power supply mode of the battery.

[0071] In the embodiment of the present invention, when the current state of the VCU satisfies the requirement of maintaining the low-voltage power supply mode of the battery, it is first necessary to determine whether the car is still in the ON position. The reason for doing this is that there may be a situation where the car is in the ON position at the beginning, but then the car is not in the ON position. For example: after the user turns the key to the "ON" position, the self-test of each controller has been completed, the high-voltage relay is disconnected, and the low-voltage calibration quantity of the ON position is the first preset value. The VCU should have controlled the car to maintain the low-voltage power supply mode of the battery, but the user did not need to use the car due to other factors, and turned the key to the "OFF" position. At this time, the car is no longer in the ON position. Therefore, when the current state of the VCU satisfies the requirement of maintaining the low-voltage power supply mode of the battery, it is also necessary to determine whether the car is still in the ON position.

[0072] If the car is still in the ON gear, the VCU controls the car to maintain the low-voltage battery power supply mode; if the car is not in the ON gear, the VCU controls each controller to enter the dormant state. That is, if the car is still in the ON gear, the VCU controls the car to maintain the low-voltage battery power supply mode; if the car is in the OFF gear, the VCU controls each controller to enter the dormant state, which is equivalent to powering off the entire vehicle.

[0073] Step 104: When the current state does not satisfy the conditions for maintaining the low-voltage battery power supply mode, the vehicle is controlled to enter the high-voltage connection mode, and the high-voltage connection mode is the high-voltage power battery power supply mode.

[0074] In the embodiment of the present invention, when the high-voltage relay of the automobile is disconnected, each controller completes the low-voltage self-test, the vehicle mode variable is the driving mode, and the low-voltage calibration quantity of the ON gear is the second preset value, the automobile is controlled to enter the high-voltage connection mode, and the high-voltage power battery is used to power the automobile. Similarly, if the VCU determines that the high-voltage relay of the automobile is not disconnected and each controller has not completed the low-voltage self-test, then it is directly determined that the automobile is in a fault state, and the VCU will issue an alarm to prompt, and at the same time prohibit the automobile from entering the high-voltage connection, and prohibit the automobile from maintaining the battery low-voltage power supply mode.

[0075] In an embodiment of the present invention, the first preset value and the second preset value can be set by oneself, for example: set the first preset value to 1 and the second preset value to 0, then when the high-voltage relay of the automobile is disconnected, each controller completes the low-voltage self-test, the vehicle mode variable is the driving mode, and the ON gear low-voltage calibration quantity is 1, the automobile is controlled to maintain the battery low-voltage power supply mode; when the high-voltage relay of the automobile is disconnected, each controller completes the low-voltage self-test, the vehicle mode variable is the driving mode, and the ON gear low-voltage calibration quantity is 0, the automobile is controlled to enter the high-voltage connection mode.

[0076] In an embodiment of the present invention, the low-voltage calibration quantity in the ON gear can be modified by a calibration tool (e.g., INCA), which defaults to the second preset value, that is, the default is that when the car is in the ON gear, it enters the high-voltage connection mode. This is because in general, when the car is in the ON gear, it is easy for the battery to feed power when the battery is kept in the low-voltage power supply mode, especially when the user stays in the ON gear for a long time when using the vehicle. Therefore, in order to avoid this situation, after the car leaves the factory, the low-voltage calibration quantity in the ON gear needs to be fixed to the second preset value. When it is necessary to develop or debug the car, the low-voltage calibration quantity in the ON gear is modified to the first preset value through the calibration tool. After the low-voltage calibration quantity in the ON gear is modified to the first preset value, the VCU needs to control the car to power on again after powering off, that is, turn the key from the "ON" gear to the "OFF" gear, and then turn it to the "ON" gear, and then the VCU executes the step: receiving the signal generated when the car is in the ON gear.

[0077] The mode switching method of the embodiment of the present invention is combined with Figure 2 The mode switching flow chart shown in FIG. 1 shows a preferred flow chart:

[0078] The signal that the vehicle is in the ON gear is received, and each controller is determined to be activated and start the low-voltage self-test. When each controller is activated and each starts the low-voltage self-test, the VCU determines whether the current state of the vehicle meets the conditions for maintaining the battery low-voltage power supply mode. As mentioned above, the conditions for maintaining the battery low-voltage power supply mode are: the high-voltage relay of the vehicle is disconnected, each controller completes the low-voltage self-test, the vehicle mode variable is the driving mode, and the low-voltage calibration amount of the ON gear is the first preset value.

[0079] If the current state of the car meets the conditions for maintaining the battery low-voltage power supply mode, the VCU determines whether the car is still in the ON gear. If the car is still in the ON gear, the VCU controls the car to maintain the battery low-voltage power supply mode; if the car is not in the ON gear, the VCU controls each controller to enter the sleep state.

[0080] If the current state of the car does not meet the conditions for maintaining the battery low-voltage power supply mode, the VCU controls the car to start high-voltage connection. The method for the car to perform high-voltage connection can refer to the currently available high-voltage connection method.

[0081] In summary, the mode switching method of the embodiment of the present invention adds an ON gear low-voltage calibration quantity to the automobile control logic, and controls whether the automobile is in the ON gear to connect to high voltage or maintain the battery low-voltage power supply mode according to the ON gear low-voltage calibration quantity. When the automobile needs to be developed or debugged, the ON gear low-voltage calibration quantity is modified to the first preset value through the calibration tool, so that the automobile maintains the battery low-voltage power supply mode when in the ON gear, which is convenient for development and debugging. The whole process does not require changes to the hardware structure or circuit structure, and can quickly realize that the automobile maintains the battery low-voltage power supply mode, thereby improving the work efficiency of the staff. At the same time, because there is no need to change the structure, it also avoids problems such as loose components and poor contact.

[0082] Reference Figure 3 , shows a block diagram of a mode switching device according to an embodiment of the present invention, the mode switching device comprising:

[0083] The signal receiving device 310 is used to receive the signal generated when the car is in the ON gear;

[0084] A judgment condition module 320, used to judge whether the current state of the vehicle satisfies the condition of maintaining the battery low voltage power supply mode;

[0085] A low voltage maintaining module 330, configured to control the vehicle to maintain the battery low voltage power supply mode when the current state satisfies the condition for maintaining the battery low voltage power supply mode;

[0086] The high-voltage connection module 340 is used to control the vehicle to enter a high-voltage connection mode when the current state does not meet the conditions for maintaining the low-voltage power supply mode of the battery, and the high-voltage connection mode is a high-voltage power battery power supply mode;

[0087] Among them, the condition for maintaining the low-voltage mode at least includes: the ON gear low-voltage calibration amount is a first preset value, and the ON gear low-voltage calibration amount is used to determine whether the vehicle is connected to high voltage or maintains the battery low-voltage power supply mode.

[0088] Optionally, the device further comprises:

[0089] Activating a self-test module, used to determine whether each controller of the vehicle is activated, and each controller starts to perform a low-voltage self-test;

[0090] The execution module is used to execute the step of determining whether the current state of the vehicle meets the conditions for maintaining the low-voltage power supply mode of the battery when each controller is activated and starts to perform a low-voltage self-test.

[0091] Optionally, the low voltage maintaining module is specifically used to: when the current state satisfies the low voltage power supply mode of the battery, determine whether the vehicle is still in the ON gear;

[0092] When the vehicle is still in the ON gear, controlling the vehicle to maintain a battery low voltage power supply mode;

[0093] The device also includes:

[0094] The sleep module is used to control each controller to enter a sleep state when the vehicle is not currently in the ON gear.

[0095] Optionally, when the current state is not satisfied, the high voltage connection module is specifically used to:

[0096] When the ON gear low-voltage calibration amount is a second preset value, the vehicle is controlled to enter a high-voltage connection mode.

[0097] Optionally, the ON gear low-voltage calibration amount is modified by a calibration tool, and the second preset value is defaulted; the device further includes:

[0098] a modification module, configured to modify the ON gear low voltage calibration amount to the first preset value through the calibration tool when it is necessary to control the automobile to maintain the battery low voltage power supply mode;

[0099] The power-on module is used to control the vehicle to power on again after being powered off, and executes the steps of: receiving a signal generated when the vehicle is in the ON gear.

[0100] Based on the above-mentioned mode switching method, an embodiment of the present invention further provides a car, the car comprising: a vehicle controller;

[0101] The vehicle controller is used to execute the method described in steps 101 to 104 above.

[0102] It should also 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", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process or method 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 or method.

[0103] The embodiments of the present invention are described above in conjunction with the accompanying drawings. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A mode switching method, characterized in that: The method comprises: In the case where the vehicle needs to be controlled to maintain the battery low-voltage power supply mode, the ON gear low-voltage calibration amount is modified to the first preset value through the calibration tool; wherein the ON gear low-voltage calibration amount is modified through the calibration tool, and the default value is the second preset value; Control the vehicle to be powered on again after being powered off, and execute the steps of: receiving a signal generated when the vehicle is in the ON gear; Determining whether the current state of the vehicle satisfies the condition of maintaining the battery low-voltage power supply mode; When the current state satisfies the condition of maintaining the battery low-voltage power supply mode, controlling the vehicle to maintain the battery low-voltage power supply mode; When the current state does not satisfy the condition of maintaining the low-voltage power supply mode of the battery, controlling the vehicle to enter a high-voltage connection mode, wherein the high-voltage connection mode is a high-voltage power battery power supply mode; The condition for maintaining the battery low-voltage power supply mode at least includes: the ON gear low-voltage calibration amount is a first preset value, and the ON gear low-voltage calibration amount is used to determine whether the vehicle is connected to a high voltage or maintains the battery low-voltage power supply mode; Wherein, when the current state does not satisfy the condition for maintaining the low-voltage power supply mode of the battery, controlling the vehicle to enter the high-voltage connection mode includes: When the ON gear low voltage calibration amount is a second preset value, controlling the vehicle to enter a high voltage connection mode; Wherein, the ON gear low pressure calibration amount is fixedly set to the second preset value after the automobile leaves the factory; The ON gear low pressure calibration amount is modified to the first preset value when the automobile is under development and debugging.

2. The method according to claim 1, characterized in that Before determining whether the current state of the vehicle satisfies the condition of maintaining the battery low voltage power supply mode, the method further includes: Determining whether each controller of the vehicle is activated and each controller starts to perform a low voltage self-test; When each controller is activated and starts to perform low-voltage self-test, the step of determining whether the current state of the vehicle satisfies the condition of maintaining the battery low-voltage power supply mode is performed.

3. The method according to claim 2, characterized in that When the current state satisfies the condition for maintaining the battery low-voltage power supply mode, controlling the vehicle to maintain the battery low-voltage power supply mode includes: When the current state satisfies the requirement of maintaining the battery low voltage power supply mode, determining whether the vehicle is still in the ON gear; When the vehicle is still in the ON gear, controlling the vehicle to maintain a battery low voltage power supply mode; The method further comprises: When the automobile is not currently in the ON gear, each controller is controlled to enter a dormant state.

4. A mode switching device, characterized in that: The device comprises: A modification module, used for modifying the ON gear low voltage calibration amount to a first preset value through a calibration tool when it is necessary to control the vehicle to maintain a battery low voltage power supply mode; A power-on module, used to control the vehicle to be powered on again after being powered off; A signal receiving device, used to receive a signal generated when the car is in the ON gear; A judgment condition module, used to judge whether the current state of the vehicle meets the condition of maintaining the battery low voltage power supply mode; A low voltage maintaining module, used for controlling the vehicle to maintain the battery low voltage power supply mode when the current state satisfies the condition of maintaining the battery low voltage power supply mode; A high-voltage connection module, used for controlling the vehicle to enter a high-voltage connection mode when the current state does not satisfy the condition for maintaining the low-voltage power supply mode of the battery, the high-voltage connection mode being a high-voltage power battery power supply mode; and used for controlling the vehicle to enter a high-voltage connection mode when the low-voltage calibration amount in the ON gear is a second preset value; Wherein, the ON gear low-pressure calibration amount is fixedly set to the second preset value after the automobile leaves the factory; the ON gear low-pressure calibration amount is modified to the first preset value when the automobile is under development and debugging; Among them, the conditions for maintaining the battery low-voltage power supply mode at least include: the ON gear low-voltage calibration amount is a first preset value, and the ON gear low-voltage calibration amount is used to determine whether the car is connected to high voltage or maintains the battery low-voltage power supply mode.

5. The device according to claim 4, characterized in that The device also includes: Activating a self-test module, used to determine whether each controller of the vehicle is activated, and each controller starts to perform a low-voltage self-test; The execution module is used to execute the step of determining whether the current state of the vehicle meets the conditions for maintaining the low-voltage power supply mode of the battery when each controller is activated and starts to perform a low-voltage self-test.

6. The device according to claim 5, characterized in that The low voltage maintaining module is specifically used to: when the current state satisfies the low voltage power supply mode of the battery, determine whether the vehicle is still in the ON gear; When the vehicle is still in the ON gear, controlling the vehicle to maintain a battery low voltage power supply mode; The device also includes: The sleep module is used to control each controller to enter a sleep state when the vehicle is not currently in the ON gear.

7. A car, characterized in that: The automobile comprises: a vehicle controller; The vehicle controller is used to execute any one of the methods described in claims 1-3.

Images