Vehicle battery power loss prevention system and vehicle control method

Abstract

This invention discloses a vehicle battery anti-discharge system and a vehicle control method. The vehicle control method includes controlling a magnetic latching relay to disconnect in response to a vehicle power-off request, thereby stopping power supply to the battery and the vehicle's electrical loads. The vehicle power-off request can be either an active request or a passive request. If the keyless entry switch or the door microswitch is activated while the vehicle is powered off, the keyless entry switch or door microswitch provides a high-level signal to the end of the magnetic latching relay connected to the battery via a corresponding transistor, activating the magnetic latching relay and enabling power supply to the battery and the vehicle's electrical loads. In this invention, the magnetic latching relay can control the power supply to and from the battery and the vehicle's electrical loads. This vehicle battery anti-discharge system has no electrical components that consume battery power and can effectively prevent battery discharge after the vehicle is powered off.

Description

Technical Field

[0001] This invention relates to the field of automotive management, and more particularly to a vehicle battery anti-discharge system and vehicle control method. Background Technology

[0002] With the development of intelligent and electric vehicles, vehicles are becoming increasingly more electronically powered, and the number of controllers and electrical components is also rapidly increasing. As a result, more controllers and electrical components in the vehicle will need to be directly connected to the battery's constant power, leading to a significant increase in the vehicle's static current after it stops, which seriously affects the length of time the vehicle can be parked.

[0003] The 12V battery is a crucial component of passenger vehicles, responsible for starting the vehicle and supplying power to electrical appliances. Whether it's a gasoline-powered car or a pure electric vehicle, a depleted battery will prevent the vehicle from starting and driving, which is a very serious malfunction. Battery depletion often occurs when the vehicle is parked for extended periods. During this time, the static current from the vehicle's electrical appliances drains the 12V battery, and the battery cannot be recharged. After a certain period, the battery will be completely depleted.

[0004] Currently, commonly used methods to prevent power loss include:

[0005] 1. Disconnect the battery cables or marine fuse to break the circuit between the battery and electrical appliances, preventing battery drain. This method generally requires professional operation and is often used when the vehicle is parked in the factory or undergoing long-term transportation. Alternatively, during the vehicle development phase, when the vehicle's electrical appliances cannot reach a sleep state, engineering technicians need to perform this operation after using the vehicle.

[0006] 2. For 12V lithium batteries, the built-in MOSFET and controller can automatically monitor the battery's health. If the battery charge drops to a certain threshold, the controller will automatically disconnect the battery from the load via the MOSFET. However, this solution is only suitable for 12V lithium battery configurations, is costly, and the built-in controller also consumes power, even after the battery is disconnected, causing the battery to continue to deplete. Maintaining the MOSFET's conduction also consumes power, increasing the vehicle's energy consumption during normal use. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a vehicle battery anti-discharge system and vehicle control method, aiming to prevent the battery power from being continuously consumed after the vehicle is powered off.

[0008] A first aspect of the present invention provides a vehicle battery anti-discharge system, comprising:

[0009] The system includes a battery, a vehicle area controller, a keyless entry switch, and door micro switches. The battery is electrically connected to the vehicle area controller via a magnetic latching relay, and the magnetic latching relay is in an open state when the vehicle is powered off. The keyless entry switch and door micro switches are electrically connected to the magnetic latching relay via a power-on controller, and the keyless entry switch and door micro switches are grounded.

[0010] When the keyless entry switch or door micro switch is triggered, the power-on controller is turned on and controls the magnetic latching relay to close, and the battery re-energizes the vehicle; when the vehicle is powered off, the vehicle area controller controls the magnetic latching relay to open, and the power-on controller is in a waiting state to be turned on.

[0011] In one optional embodiment, the emitters of transistors BJT1 and BJT2 are connected to the battery, the base electrodes of transistors BJT1 and BJT2 are connected to the first pin of the MCU, the base electrodes of the transistors are also connected to the A1 pin of the power-on controller, the base of transistor BJT1 is connected to the keyless entry switch, and the base of transistor BJT2 is connected to the door micro switch.

[0012] In one optional embodiment, a resistor is connected in parallel between the emitter and base of the transistors BJT1 and BJT2, a resistor is connected in series between the transistor BJT1 and the keyless entry switch 5, and a resistor is connected in series between the transistor BJT2 and the door micro switch.

[0013] In one optional embodiment, the vehicle area controller includes an MCU, a first pin of the MCU connected to the A1 pin of the driver chip of the magnetic latching relay, a second pin of the MCU connected to the B1 pin of the driver chip of the magnetic latching relay, a third pin of the MCU connected to the keyless entry switch, and a fourth pin of the MCU connected to the door micro switch.

[0014] In one alternative embodiment, the power-on controller is located within the vehicle area controller.

[0015] In one alternative embodiment, the vehicle area controller includes an MCU connected to an electronic battery sensor for acquiring the battery's current and SOC state.

[0016] In one optional embodiment, the vehicle area controller is further connected to a smart cabin area controller and an antenna, the antenna communicating with the vehicle key after the vehicle is powered on; the power pin of the vehicle area controller is connected to the battery, the battery is also connected to a vehicle electrical load, and the vehicle electrical load is grounded.

[0017] A second aspect of the present invention provides a vehicle control method applied to the vehicle battery anti-discharge system described in the first aspect of the present invention, comprising:

[0018] In response to a vehicle power-down request, the magnetic latching relay is disconnected, thereby stopping the power supply to the battery and the vehicle's electrical loads. The vehicle power-down request includes both active and passive requests.

[0019] When the vehicle is powered off, if the keyless entry switch is turned on, the keyless entry switch provides a high level to the end of the magnetic latching relay connected to the battery through the transistor BJT1, thereby activating the magnetic latching relay and enabling the battery to supply power to the vehicle's electrical loads.

[0020] When the vehicle is powered off, if the door microswitch is turned on, the door microswitch provides a high level to the end of the magnetic latching relay connected to the battery through the transistor BJT2, activating the magnetic latching relay to supply power to the battery and the vehicle's electrical loads.

[0021] In one alternative implementation, the magnetic latching relay is disconnected by the vehicle area controller in response to a vehicle power-down request. The battery powers the power pins of the vehicle area controller. When the vehicle area controller detects that the pin connected to the keyless entry switch is triggered, it drives the antenna to search for a key signal to execute a key unlocking request.

[0022] A third aspect of the present invention provides a vehicle including the vehicle battery anti-discharge system described in the first aspect of the present invention.

[0023] This invention utilizes a vehicle area controller, door microswitches, keyless entry switches, magnetic latching relays, and a power-on controller to form a battery anti-discharge control system. The battery is activated via the keyless entry switch and deactivated via the vehicle area controller. The magnetic latching relays can control the power supply between the battery and the vehicle's electrical loads. This vehicle battery anti-discharge system has no electrical components that consume battery power and can effectively prevent battery discharge after the vehicle is powered off. Attached Figure Description

[0024] Figure 1 This is a circuit diagram of a vehicle battery anti-discharge system according to an embodiment of the present invention.

[0025] Figure 2 This is a flowchart illustrating a vehicle control method according to an embodiment of the present invention.

[0026] Figure 3 This is a flowchart of the whole vehicle power-off process in this invention.

[0027] 1. Battery; 2. Magnetic latching relay; 3. Vehicle area controller; 4. Door micro switch; 5. Keyless entry switch; 6. Power-on controller U1. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] This invention provides a vehicle, including but not limited to gasoline vehicles and new energy vehicles, with new energy vehicles including but not limited to electric vehicles. The vehicle includes a battery depletion prevention system.

[0030] In some embodiments of the present invention, the vehicle battery anti-discharge system may include a controller, which is a microcontroller chip integrating a processor, memory, communication module, etc. The processor may refer to the processor included in the controller. The processor may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), high-performance computing (HPCs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0031] In one embodiment of the present invention, taking a high-performance calculator as an example, a vehicle area controller controls the vehicle's battery to power off and executes control tasks related to power-on.

[0032] Please see Figure 1As shown, the vehicle battery anti-discharge system of this invention includes: a battery 1, a vehicle zone controller 3 (Zone area in the figure), a keyless entry switch 5, a power-on controller U1, a magnetic latching relay 2, and a driver door ajar switch 4. The main function of the power-on controller U1 is to connect the magnetic latching relay 2, providing a high-level signal to trigger its operation. In this embodiment, the power-on controller uses a relay driver chip, which is located within the vehicle zone controller 3. This invention also utilizes transistor pins connected to the keyless entry switch 5, the driver door ajar switch 4, and the magnetic latching relay 2 respectively; this allows the keyless entry switch 5 and the driver door ajar switch 4 to trigger potential changes in the transistors, thus activating the circuit. Details will be provided later.

[0033] exist Figure 1 In this configuration, the vehicle area controller 3, as a whole, includes the power-on controller U1 and the MCU. One end of the battery 1 is grounded, and the other end is connected to the vehicle's electrical load. One end of the keyless entry switch 5 (PE_Switch, a keyless entry button on the driver's side door handle) is grounded, and the other end is connected to the MCU of the vehicle area controller 3 and the BJT1 transistor. The magnetic latching relay 2 is positioned between the battery 1 and the vehicle's electrical load, and its on / off state controls the power supply to the electrical load. The magnetic latching relay 2 is also connected to the MCU via the power-on controller U1.

[0034] Specifically, the base of transistor BJT1 is connected to the keyless entry switch 5. The emitter of transistor BJT1 is connected to the battery 1, and the base of transistor BJT1 is connected to the first pin of the MCU. The base of transistor BJT1 is also connected to the A1 pin of the power-on controller U1, and the base of transistor BJT1 is grounded through the keyless entry switch 5. When the keyless entry switch 5 is turned on, it can cause a potential change in transistor BJT1.

[0035] The base of the BJT2 transistor is connected to the door microswitch 4. The emitter of the BJT2 transistor is connected to the battery 1, and the base of the BJT2 transistor is connected to the first pin of the MCU. The base of the BJT2 transistor is also connected to the A1 pin of the power-on controller U1, and the base of the BJT2 transistor is grounded. When the door microswitch 4 is turned on, it can cause a change in the potential of the BJT2 transistor.

[0036] Furthermore, a resistor is connected in parallel between the emitter and base of transistors BJT1 and BJT2, a resistor is connected in series between transistor BJT1 and the keyless entry switch 5, and a resistor is connected in series between transistor BJT2 and the door micro switch; the circuit is protected by the above method.

[0037] Figure 1 Resistors R1 and R3 are current-limiting resistors to prevent excessive base current from damaging transistors BJT1 and BJT2. Resistors R2 and R4 are pull-up resistors to ensure that transistors BJT1 and BJT2 remain in the off state when there is no input (floating) at their bases.

[0038] This invention also includes diodes: D1, D2, D3, and D4, for circuit protection. For example... Figure 1 As shown, diode D1 prevents the MCU's B1 pin from conducting to the power supply through resistors R1 and R2 when the keyless entry switch 5 is not closed, thus preventing abnormal operation of the magnetic latching relay 2 or damage to the vehicle area controller 3 pin. Diode D3 prevents the MCU's B1 pin from conducting to the battery 1 through resistors R3 and R4 when the door microswitch 4 is not closed, thus preventing abnormal operation of the magnetic latching relay 2 or damage to the MCU pin.

[0039] Diode D2 prevents the PE pin of the MCU from being connected to the battery 1 through resistors R1 and R2 when the keyless entry switch 5 is not closed, thus preventing damage to the PE pin. It also prevents the PE pin from being connected to the B1 pin of the MCU through diode D1, thus preventing damage to the PE pin when the MCU's B1 pin outputs a high level. Diode D4 prevents the door microswitch 4 pin of the vehicle area controller 3 from being connected to the battery 1 through resistors R3 and R4 when the door microswitch 4 is not closed, thus preventing damage to the door microswitch 4 pin. It also prevents the door microswitch 4 pin from being connected to the B1 pin of the MCU through diode D3, thus preventing damage to the door microswitch 4 pin when the MCU's B1 pin outputs a high level.

[0040] Furthermore, the first pin of the MCU is connected to the A1 pin of the power-on controller U1, the second pin of the MCU is connected to the B1 pin of the power-on controller U1, the third pin of the MCU is connected to the keyless entry switch 5, and the fourth pin of the MCU is connected to the door micro switch.

[0041] When the A pin of the magnetic latching relay 2 is high and the B pin is low, the magnetic latching relay 2 is closed; when the A pin is low and the B pin is high, the magnetic latching relay 2 is open. The magnetic latching relay 2 does not require input to the A pin or the B pin to remain closed or open.

[0042] The high and low levels of the magnetic latching relay 2 are input by the power-on controller U1, whose two pins are connected to pins A and B of the magnetic latching relay 2, respectively. The power-on controller U1 is a dedicated magnetic latching relay chip, such as the BL8023C chip. When the input A1 of the power-on controller U1 is high and B1 is low, the output pins of the magnetic latching relay 2 are A high and B low; when the input A1 is low and B1 is high, the output pins of the magnetic latching relay 2 are A low and B high; when both A1 and B1 are high or low, the outputs A and B remain unchanged.

[0043] Please continue reading. Figure 1 If the vehicle needs to be powered on again after a power outage, the user only needs to press and hold or press the keyless entry switch 5 on the driver's side door twice consecutively. The duration of the press and hold depends on the vehicle's power-on and unlocking time. When the user presses the keyless entry switch 5, the transistor BJT1 inside the vehicle area controller 3 conducts. The A1 pin of the power-on controller U1 is connected to the power supply through the transistor BJT1 and is at a high level. The B1 pin of the power-on controller U1 is grounded through the keyless entry switch 5 and is at a low level. The control magnetic latching relay 2 of the power-on controller U1 closes. The 12V battery 1 is connected to the vehicle load circuit, and the intelligent cockpit controller (IVI) is powered on. The power supply pin VCC of the vehicle area controller 3 is powered on.

[0044] The vehicle area controller 3 is also connected to the smart cabin area controller and the antenna. The antenna communicates with the car key after the vehicle is powered on. The power pin of the vehicle area controller 3 is connected to the battery 1. The battery 1 is also connected to the vehicle electrical load, which is grounded.

[0045] When the VCC power pin of the vehicle area controller 3 is powered on, the vehicle area controller 3 detects the PE (keyless entry) request through the PE pin after power-on. Then, the Ant pin drives the antenna to search for the key. Once a valid key is found, the door can be unlocked and the vehicle can be used normally. If the user presses the keyless entry switch 5 for a short time and releases the keyless entry switch 5 before the vehicle area controller 3 has finished powering on, the vehicle area controller 3 will not be able to detect the PE request, and the user will need to press the keyless entry switch 5 again to unlock the vehicle.

[0046] Please continue reading. Figure 1If the vehicle needs to be powered back on after a power outage, it can be done by opening the driver's side door. The customer inserts the key into the driver's side door ignition, turns the key to unlock the door, and then opens the door. At this time, the door microswitch 4 closes, turning on the BJT2 transistor inside the Zone. The A1 pin of the power-on controller U1 is connected to the power supply through the BJT2 transistor, and is at a high level. The B1 pin is grounded through the door microswitch 4, and is at a low level. The power-on controller U1 then controls the magnetic latching relay 2 to close, connecting the 12V battery to the vehicle's load circuit, allowing the user to use the vehicle normally.

[0047] Furthermore, the MCU is connected to the electronic battery sensor (EBS) to acquire the current and SOC status of the battery. The status of the battery enables automatic power-off functionality in case of abnormal vehicle power consumption.

[0048] When the vehicle is stationary and off (i.e., the engine is not started or the high voltage is not powered), the vehicle area controller 3 detects the current and SOC status of the 12V battery 1 through the electronic battery 1 sensor. If the discharge current of battery 1 exceeds the threshold (e.g., 50mA) and continues for a certain period of time (e.g., 15 minutes), or if the SOC of battery 1 drops below the threshold (e.g., 20%), the vehicle area controller 3 issues a warning signal, alerting the user via the in-vehicle screen or mobile app: "Battery 1 is low on power and will soon be disconnected. Remote control and remote control functions will be unavailable." The user can then choose to confirm or cancel the power disconnection. If the user clicks "Confirm" or does not click within 30 seconds, the B1 pin of the MCU of the vehicle area controller 3 outputs a high level for 500ms, the A1 pin is in a high impedance state, and grounded through the pull-down resistor R5 to a low level. The power-on controller U1 controls the contacts of the magnetic latching relay 2 to open; at this time, the circuit between battery 1 and the vehicle loads is completely disconnected. If the user clicks the "Cancel" button within 30 seconds, the power disconnection process is terminated.

[0049] In other embodiments of the present invention, the user requests the battery 1 to be powered off by clicking the power-off switch on the in-vehicle display screen or through the vehicle remote control mobile APP. When the vehicle area controller 3 receives the power-off request, it displays a message on the in-vehicle display screen or mobile APP stating, "The vehicle is about to be powered off. Please get out and lock the vehicle within 30 seconds. Cancel?" to prevent the vehicle from being unable to lock after the power is off. If the user locks the vehicle at this time, or if the 30-second window has expired but the user hasn't locked the vehicle, the intelligent cabin domain controller will send a power-off command to the vehicle area controller 3. The B1 pin of the MCU of the vehicle area controller 3 will output a low level and a high level for 500ms. The A1 pin of the vehicle area controller 3 will be in a high-impedance state, grounded through the pull-down resistor R5 to a low level. The power-on controller U1 will control the magnetic latching relay 2 to open its contacts. At this time, the circuit between the battery 1 and the vehicle load is completely disconnected. If the customer clicks the cancel button within 30 seconds, the power-off process is terminated.

[0050] As can be seen from the above, the present invention can realize the connection or disconnection of the vehicle's 12V battery circuit through automatic or manual control, so as to prevent power loss. The system is simple in composition and uses a magnetic latching relay 2. The magnetic latching relay 2 can be activated by keyless entry. The magnetic latching relay 2 does not need to continuously consume the battery power before and after power failure.

[0051] This invention also provides a vehicle control method applied to the vehicle battery anti-discharge system described herein. In the vehicle battery anti-discharge system, when the vehicle is powered off, the magnetic latching relay 2 is in an open state. The battery 1 is electrically connected to the vehicle area controller 3 via the magnetic latching relay 2. The keyless entry switch 5 is electrically connected to the magnetic latching relay 2 via a power-on controller, and the keyless entry switch 5 is grounded. When the keyless entry switch 5 is triggered, the power-on controller is turned on and controls the magnetic latching relay 2 to close, thus re-energizing the battery 1. When the vehicle is powered off, the vehicle area controller 3 controls the magnetic latching relay 2 to open, and the power-on controller is in a waiting-to-be-turned-on state. The power-on controller is located within the vehicle area controller 3.

[0052] Furthermore, the present invention also includes a short-circuit protection function. The MCU uses the circuit connection signal to detect the output of the status control level of the keyless entry switch 5 and the door micro switch 4. When the MCU detects that at least one of the keyless entry switch 5 and the door micro switch 4 is closed, the B1 pin of the MCU will not output a high level to prevent the B1 pin from being short-circuited to ground through the keyless entry switch 5 and the door micro switch 4.

[0053] Please see Figure 2 The vehicle control method includes the following steps:

[0054] Step 201: In response to a vehicle power-down request, the magnetic latching relay is disconnected, causing the battery and vehicle electrical loads to stop receiving power. The vehicle power-down request includes both active and passive requests.

[0055] In one embodiment, the active request includes: the vehicle area controller receiving a power-off request from the user via the in-vehicle display screen, terminal APP, or parking; the first and second pins of the vehicle area controller output a low level and a high level for 500ms respectively, causing the contacts of the magnetic latching relay to open, at which point the circuit between the battery and the vehicle load is completely disconnected. If the customer clicks the cancel button within 30 seconds, the power-off process is terminated.

[0056] The passive request includes a function that triggers automatic power-off based on the battery's status, activating when the vehicle experiences abnormal power consumption. The vehicle area controller detects the current and SOC status of the 12V battery using electronic battery sensors. If the battery discharge current exceeds a threshold (e.g., 50mA) and persists for a certain period (e.g., 15 minutes), or if the battery SOC drops below a threshold (e.g., 20%), the vehicle area controller issues a warning signal, alerting the user via the in-vehicle screen or mobile app: "Battery low on power, power off imminent, remote control and other remote control functions will be unavailable." The user can then confirm or cancel the power-off. If the user confirms or does not confirm within 30 seconds, the vehicle area controller's first and second pins output low and high levels respectively for 500ms, opening the magnetic latching relay contacts and completely disconnecting the circuit between the battery and the vehicle load. If the user cancels within 30 seconds, the power-off process is terminated.

[0057] Step 202: If the keyless entry switch is turned on when the vehicle is powered off, the keyless entry switch provides a high level to the end of the magnetic latching relay connected to the battery through the transistor BJT1, thereby activating the magnetic latching relay and supplying power to the battery and the vehicle's electrical loads.

[0058] The user presses and holds the keyless entry switch on the driver's side door twice, or holds it for a period of time depending on the vehicle's power-on and unlocking time. When the user presses the keyless entry switch, the transistor inside the vehicle's area controller conducts. Pin A of the magnetic latching relay is connected to the battery through the transistor and is at a high level, while pin B is grounded through the keyless entry switch and is at a low level. The magnetic latching relay closes, connecting the 12V battery to the vehicle's load circuit, and powering on the VCC pin of the vehicle's area controller.

[0059] Step 203: If the door microswitch is turned on when the vehicle is powered off, the door microswitch provides a high level to the end of the magnetic latching relay connected to the battery through the transistor BJT2, thereby activating the magnetic latching relay and supplying power to the battery and the vehicle's electrical loads.

[0060] The customer inserts the key into the driver's side door ignition, turns the key to unlock the door, and then opens the door. At this point, the door microswitch 4 closes, turning on the BJT2 transistor inside the Zone. Pin A1 of the power-on controller U1 is connected to the power supply through the BJT2 transistor, and is at a high level. Pin B1 is grounded through the door microswitch 4, and is at a low level. The power-on controller U1 then controls the magnetic latching relay 2 to close, connecting the 12V battery to the vehicle's load circuit, allowing the user to use the vehicle normally.

[0061] The vehicle control method further includes the following steps:

[0062] The magnetic latching relay is disconnected by the vehicle area controller in response to a vehicle power-down request. The battery powers the power pin of the vehicle area controller. When the vehicle area controller detects that the pin connected to the keyless entry switch is triggered, it drives the antenna to search for the key signal to execute the key unlocking door request.

[0063] For example, after the vehicle area controller is powered on, it detects the PE (keyless entry) request via the PE pin, and then drives the Ant pin to drive the Antenna to search for the key. Once a valid key is found, the door can be unlocked and the vehicle can be used normally. If the user presses the keyless entry switch for a short time and releases it before the vehicle area controller has finished powering on, the vehicle area controller will not be able to detect the PE request, and the user will need to press the keyless entry switch again to unlock the vehicle.

[0064] Please see Figure 3 As shown, Figure 3 The flowchart for the whole vehicle power-off process in this invention is as follows:

[0065] After starting, step 301: If the user remotely requests a power cut-off for the entire vehicle via the in-vehicle screen or terminal APP;

[0066] Step 302: This involves executing a countdown to prompt the user to leave the vehicle and locking the doors from the outside.

[0067] Step 303: If the user clicks Cancel, return to step 301;

[0068] Step 304: If the user does not cancel, perform external locking or the vehicle is in a timeout unlocked state;

[0069] Step 305: If no request is received after step 301, determine whether the battery is discharging;

[0070] Step 306: If yes, determine whether the battery discharge current continuously exceeds the threshold when the vehicle is off. If it exceeds the threshold, proceed to step 308.

[0071] Step 307: If not, determine whether the battery SOC is lower than the threshold for a certain period of time. If it exceeds the threshold, proceed to step 308.

[0072] Step 308: Remotely push information to the terminal APP;

[0073] Step 309: Depending on the user's choice, either perform a power outage or return to step 301;

[0074] Step 310: Control the magnetic latching relay to disconnect.

[0075] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0076] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0077] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle battery anti-discharge system, characterized in that, include: The system includes a battery, a vehicle area controller, a keyless entry switch, and door microswitches. The battery is electrically connected to the vehicle area controller via a magnetic latching relay, and the magnetic latching relay is in an open state when the vehicle is powered off. The keyless entry switch is electrically connected to the magnetic latching relay via a power-on controller, and the keyless entry switch is grounded. The door microswitches are electrically connected to the magnetic latching relay via the power-on controller, and both the keyless entry switch and the door microswitches are grounded. When the keyless entry switch or the door micro switch is triggered, the power-on controller is turned on and controls the magnetic latching relay to close, and the battery re-energizes the vehicle; when the vehicle is powered off, the vehicle area controller controls the magnetic latching relay to open, and the power-on controller is in a waiting state to be turned on. The power-on controller comprises transistors BJT1 and BJT2, and the vehicle area controller includes an MCU. The emitters of transistors BJT1 and BJT2 are connected to the battery, and the bases of transistors BJT1 and BJT2 are connected to the first pin of the MCU. The bases of the transistors are also connected to the A1 pin of the power-on controller. The base of transistor BJT1 is connected to the keyless entry switch, and the base of transistor BJT2 is connected to the door microswitch.

2. The vehicle battery anti-discharge system according to claim 1, characterized in that, A resistor is connected in parallel between the emitter and base of transistors BJT1 and BJT2. A resistor is connected in series between transistor BJT1 and the keyless entry switch. A resistor is connected in series between transistor BJT2 and the door micro switch.

3. The vehicle battery anti-discharge system according to claim 1, characterized in that, The vehicle area controller includes an MCU. The first pin of the MCU is connected to the A1 pin of the driver chip of the magnetic latching relay, the second pin of the MCU is connected to the B1 pin of the driver chip of the magnetic latching relay, the third pin of the MCU is connected to the keyless entry switch, and the fourth pin of the MCU is connected to the door micro switch.

4. The vehicle battery anti-discharge system according to claim 1, characterized in that, The power-on controller is located within the vehicle area controller.

5. The vehicle battery anti-discharge system according to claim 1, characterized in that, The vehicle area controller includes an MCU, which is connected to an electronic battery sensor to acquire the battery's current and SOC status.

6. The vehicle battery anti-discharge system according to claim 1, characterized in that, The vehicle area controller is also connected to the smart cabin area controller and the antenna. The antenna communicates with the car key after the vehicle is powered on. The power pin of the vehicle area controller is connected to the battery. The battery is also connected to the vehicle's electrical load, which is grounded.

7. A vehicle control method, applied to the vehicle battery anti-discharge system according to any one of claims 1 to 6, characterized in that, include: In response to a vehicle power-down request, the magnetic latching relay is disconnected, thereby stopping the power supply to the battery and the vehicle's electrical loads. The vehicle power-down request includes both active and passive requests. When the vehicle is powered off, if the keyless entry switch is turned on, the keyless entry switch provides a high level to the end of the magnetic latching relay connected to the battery through the transistor BJT1, thereby activating the magnetic latching relay and enabling the battery to supply power to the vehicle's electrical loads. When the vehicle is powered off, if the door microswitch is turned on, the door microswitch provides a high level to the end of the magnetic latching relay connected to the battery through the transistor BJT2, activating the magnetic latching relay to supply power to the battery and the vehicle's electrical loads.

8. The vehicle control method according to claim 7, characterized in that, The magnetic latching relay is disconnected by the vehicle area controller in response to a vehicle power-down request. The battery powers the power pin of the vehicle area controller. When the vehicle area controller detects that the pin connected to the keyless entry switch is triggered, it drives the antenna to search for the key signal to execute the key unlocking door request.

9. A vehicle, characterized in that, The vehicle battery anti-discharge system includes any one of claims 1 to 6.

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