Automobile Bluetooth entity key power consumption optimization method and automobile Bluetooth entity key

Abstract

The invention discloses an automobile Bluetooth entity key power consumption optimization method and an automobile Bluetooth entity key. According to the method, the key working state is intelligently divided into a transportation mode, a sleep mode, a connection mode, a broadcast mode and a positioning mode, and Bluetooth communication behaviors and automatic switching in the modes are controlled according to preset power consumption optimization parameters and user intentions. The core lies in that deep energy saving is realized by turning off an unnecessary communication module (such as turning off Bluetooth in transportation and sleep modes); quick switching is achieved through a motion sensor and a user operation intention (such as car door pulling and button pressing) triggering mode, and response instantaneity is guaranteed; and the working mode is adjusted in a self-adaptive mode according to the connection state, the vehicle gear and the standing time. According to the method, the average power consumption of the Bluetooth key is remarkably reduced, the battery life is greatly prolonged, meanwhile, non-inductive entry and quick response are achieved on user experience, and optimal balance of performance and power consumption is achieved through software strategy innovation.

Description

Technical Field

[0001] This invention relates to the field of electronic information technology, and in particular to a method for optimizing the power consumption of a car Bluetooth physical key and a car Bluetooth physical key. Background Technology

[0002] A review of the development history of car keys: The development of car keys has always revolved around "convenience" and "intelligence," with the core characteristics of each stage as follows: Mechanical key: The operation process is cumbersome, requiring manual insertion into the lock to complete operations such as opening and closing the car door and starting the vehicle; Remote key: can remotely control the vehicle, but cannot locate it, and all operations require manually triggering the key buttons; Smart key: Supports location tracking, allowing you to control the vehicle without taking out the key, significantly improving convenience; Digital keys: These completely replace traditional physical keys with mobile phones, enabling vehicle control in all scenarios. Digital keys primarily utilize the following technologies: NFC keys, Bluetooth keys, and UWB keys.

[0003] The application value and existing problems of Bluetooth physical keys: With the development of automotive intelligence, Bluetooth physical keys have become an important supplement to traditional keys and virtual keys, combining the reliability of physical keys with intelligent functions such as low-power Bluetooth communication and keyless entry, and are widely used in new energy vehicles, shared mobility, and other fields. However, the functional upgrade has led to a surge in power consumption, and the short battery life of keys has become a core pain point: because Bluetooth signals do not have the ability to actively wake up the receiver, they need to continuously broadcast Bluetooth signals at fixed intervals to search for connectable devices; once within the device's connection range, both parties need to send heartbeat packets at fixed time intervals to maintain the connection. This "continuous broadcast-heartbeat interaction" working mechanism means that it cannot remain in an ultra-low power sleep state for a long time like remote control keys and smart keys, but rather frequently operates in a high-power mode. This is the core reason why the battery life of Bluetooth keys is much shorter than that of traditional keys and smart keys; maintaining Bluetooth connection and real-time location broadcasting means that the mainstream CR2032 battery in Bluetooth keys can only be used for about 0.5 years, far less than that of remote control keys (5+ years, only remote control function, no location) and smart keys (1.5 years, with both remote control and low-frequency location functions). Commercial vehicle users (such as express delivery and freight companies) use their vehicles for extended periods, up to 12 hours a day. The keys are constantly in high-power mode, and the battery life is sometimes less than 3 months, which seriously affects operational efficiency. In contrast, passenger car users use their vehicles for a shorter period of time, generally 2-4 hours a day, so the power consumption pressure is significantly lower. The difference in scenarios further highlights the battery life shortcomings of Bluetooth keys for commercial vehicles. Summary of the Invention

[0004] The technical solution of this invention to solve the above-mentioned technical problems is to provide a method for optimizing the power consumption of a car Bluetooth physical key, applied to a Bluetooth physical key including a Bluetooth module, a motion sensor, and buttons, the method comprising: The working states of the Bluetooth physical key are divided into transportation mode, sleep mode, connection mode, broadcast mode, and positioning mode; The Bluetooth communication behavior of the physical key in each working mode is controlled according to preset power consumption optimization parameters. Based on user intent, the Bluetooth physical key is triggered to switch from the connection mode to the location mode, and after a preset timeout period in the location mode, it automatically switches back from the location mode to the connection mode. The definitions and switching principles for each working mode are as follows: In transport mode, the Bluetooth module and the motion sensor are turned off, and only the button wake-up function is retained; In sleep mode, the Bluetooth module is turned off, and the motion sensor and button wake-up function are turned on; In connection mode, the Bluetooth module establishes a connection with the vehicle and sends heartbeat packets at a preset connection interval; In broadcast mode, the Bluetooth module sends broadcast signals at a preset broadcast period; In positioning mode, the Bluetooth module sends broadcast signals for positioning at a preset positioning cycle; The mode switching principles include: Once the key in transport mode is successfully matched with the vehicle for the first time, it will enter broadcast mode. When the Bluetooth connection of the key in connection mode is lost, it enters broadcast mode. If it remains idle for a first preset time, it enters sleep mode. Once the key in broadcast mode establishes a Bluetooth connection with the vehicle, it enters location mode. If it remains stationary for the first preset time, it enters sleep mode. When the key in sleep mode detects a motion sensor signal, it enters broadcast mode; When a key in connection mode or location mode is left idle for the first preset time, it enters sleep mode.

[0005] Furthermore, the transportation mode is activated after the Bluetooth physical key leaves the factory, and terminates and switches to broadcast mode after the vehicle is successfully paired with the Bluetooth physical key for the first time.

[0006] Furthermore, the sleep mode is activated after the Bluetooth physical key remains stationary for a period of time that reaches the first preset time, and exits and switches to broadcast mode when the motion sensor signal is detected or the button is triggered.

[0007] Furthermore, the "triggered based on user intent" includes at least one of the following scenarios: The Bluetooth physical key was detected to have established a Bluetooth connection with the vehicle. The vehicle door handle switch has been triggered. The vehicle door was detected to be open. The button on the Bluetooth physical key was detected to be pressed; The system detected that the vehicle's brake pedal was pressed when the vehicle was not running.

[0008] Furthermore, in the connection mode, when the vehicle is detected to be in a non-P gear state, the Bluetooth physical key maintains or enters the connection mode.

[0009] The present invention also proposes a car Bluetooth physical key, comprising: a processor, a memory, a Bluetooth module, a motion sensor, and a button; The memory stores a computer program that, when executed by the processor, causes the Bluetooth physical key to perform the power consumption optimization method for car Bluetooth physical keys as described above.

[0010] The car Bluetooth physical key and its power consumption optimization method provided by this invention have the following significant advantages: Achieving extremely low power consumption and ultra-long battery life: By systematically dividing the operation into five modes (transport, sleep, broadcast, connection, and positioning) and formulating precise switching logic, the key activates the Bluetooth module for communication only when necessary. Especially in transport and sleep modes, the Bluetooth module is completely turned off, relying solely on extremely low-power sensors or buttons for wake-up, fundamentally eliminating unnecessary radio frequency energy consumption. This minimizes the overall average power consumption, significantly extending battery life by several times and reducing the frequency of battery replacements and maintenance costs for users. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram illustrating the switching principle of the power consumption optimization method for automotive Bluetooth physical keys described in this invention. Figure 2 This is a detailed schematic diagram illustrating the switching principle of the power consumption optimization method for automotive Bluetooth physical keys described in this invention. Detailed Implementation

[0013] This invention proposes a power consumption optimization method for automotive Bluetooth physical keys and an automotive Bluetooth physical key, aiming to provide an efficient, intelligent, and low-cost power consumption optimization solution.

[0014] The power consumption optimization method for automotive Bluetooth physical keys proposed in this invention will be described below in specific embodiments: In the technical solution of this embodiment, such as Figure 1 , Figure 2 As shown, a power consumption optimization method for a car Bluetooth physical key is applied to a Bluetooth physical key that includes a Bluetooth module, a motion sensor, and buttons. The method includes: The working states of the Bluetooth physical key are divided into transportation mode, sleep mode, connection mode, broadcast mode, and positioning mode; The Bluetooth communication behavior of the physical key in each working mode is controlled according to preset power consumption optimization parameters. Based on user intent, the Bluetooth physical key is triggered to switch from the connection mode to the location mode, and after a preset timeout period in the location mode, it automatically switches back from the location mode to the connection mode. The definitions and switching principles for each working mode are as follows: In transport mode, the Bluetooth module and the motion sensor are turned off, and only the button wake-up function is retained; In sleep mode, the Bluetooth module is turned off, and the motion sensor and button wake-up function are turned on; In connection mode, the Bluetooth module establishes a connection with the vehicle and sends heartbeat packets at a preset connection interval; In broadcast mode, the Bluetooth module sends broadcast signals at a preset broadcast period; In positioning mode, the Bluetooth module sends broadcast signals for positioning at a preset positioning cycle; The mode switching principles include: Once the key in transport mode is successfully matched with the vehicle for the first time, it will enter broadcast mode. When the Bluetooth connection of the key in connection mode is lost, it enters broadcast mode. If it remains idle for a first preset time, it enters sleep mode. Once the key in broadcast mode establishes a Bluetooth connection with the vehicle, it enters location mode. If it remains stationary for the first preset time, it enters sleep mode. When the key in sleep mode detects a motion sensor signal, it enters broadcast mode; When a key in connection mode or location mode is left idle for the first preset time, it enters sleep mode.

[0015] Specifically, the pre-approval power is as follows: Transportation mode: 1.89μA; Sleep mode: 3.15μA; Connection mode: 17μA; Broadcast mode: 50μA; Positioning mode: 75μA.

[0016] Furthermore, the transportation mode is activated after the Bluetooth physical key leaves the factory, and terminates and switches to broadcast mode after the vehicle is successfully paired with the Bluetooth physical key for the first time.

[0017] Furthermore, the sleep mode is activated after the Bluetooth physical key remains stationary for a period of time that reaches the first preset time, and exits and switches to broadcast mode when the motion sensor signal is detected or the button is triggered.

[0018] Furthermore, the "triggered based on user intent" includes at least one of the following scenarios: The Bluetooth physical key was detected to have established a Bluetooth connection with the vehicle. The vehicle door handle switch has been triggered. The vehicle door was detected to be open. The button on the Bluetooth physical key was detected to be pressed; The system detected that the vehicle's brake pedal was pressed when the vehicle was not running.

[0019] Furthermore, in the connection mode, when the vehicle is detected to be in a non-P gear state, the Bluetooth physical key maintains or enters the connection mode.

[0020] The present invention also proposes a car Bluetooth physical key, comprising: a processor, a memory, a Bluetooth module, a motion sensor, and a button; The memory stores a computer program that, when executed by the processor, causes the Bluetooth physical key to perform the power consumption optimization method for car Bluetooth physical keys as described above.

[0021] Bluetooth key working mode analysis: 1) Explanation of the working principle of car keys: Compared to traditional remote control keys and smart keys, Bluetooth keys have significantly different operating modes. The core differences lie in the wake-up mechanism and communication method, as detailed below: Remote key: It only enters working mode when triggered by a button, and otherwise remains in an ultra-low power state. It only supports button wake-up. Smart Key: Enters working mode when triggered by button or when a low-frequency signal indicating that the vehicle is looking for the key is received. The core supports dual modes of "low-frequency signal wake-up + button wake-up". Bluetooth keys: Because Bluetooth signals do not have the ability to actively wake up the receiver, they need to continuously broadcast Bluetooth signals at fixed intervals to search for connectable devices. Once within the device's range, both parties need to send heartbeat packets at fixed intervals to maintain the connection. This "continuous broadcast-heartbeat interaction" mechanism prevents them from remaining in an ultra-low power sleep state for extended periods like remote control keys and smart keys. Instead, they frequently operate in high power mode, which is the core reason why Bluetooth keys have significantly shorter battery life than traditional keys and smart keys.

[0022] 2) Definition of Bluetooth key working mode: Transportation mode: The key is in its state from the time it leaves the factory until it is installed in the vehicle, and the key only retains the button wake-up function.

[0023] Sleep mode: When the key remains stationary for an extended period of time, Bluetooth is turned off, but the button and motion sensor wake-up functions are retained.

[0024] Connection mode: The key establishes a Bluetooth connection with the vehicle, but location tracking is not required. Bluetooth maintains a Bluetooth heartbeat connection at relatively long intervals.

[0025] Broadcast mode: The key and vehicle have not established a Bluetooth connection, but the key is in motion and needs to continuously search for the vehicle, requiring the broadcast signal to be sent at a higher frequency.

[0026] Location mode: The key establishes a Bluetooth connection with the vehicle. The vehicle needs to determine the key's location information. Bluetooth needs to maintain a low time interval and needs to send a location broadcast.

[0027] 3) Key battery life calculation model: To quantify the battery life of Bluetooth physical keys, a scientific battery life calculation model is established based on their working characteristics and energy consumption patterns. The specific parameters are defined as follows: Battery life (T): The continuous working time of the key from its initial state to the critical battery threshold, which is a core evaluation indicator of the effectiveness of low-power design; Battery capacity (C): Unit mAh, representing energy storage capacity; an 80% effective utilization coefficient is introduced to cope with aging, temperature changes and other operating conditions, the actual usable capacity is C×80%; Operating parameters: Five user-side operating modes (sleep, connection, broadcast, positioning, and backup redundancy) are defined as M1~M5, corresponding to currents I1~I5 (μA) and average daily durations t1~t5 (h). The transportation mode is a transitional state from factory to delivery, terminated after user activation, and is not included in the range calculation. Additional notes: The transportation mode has extremely low energy consumption (e.g., 1.89μA) and lasts for 2~6 months, accounting for <5% of the total capacity; its impact on user-side range is negligible and therefore does not need to be included in the model. Based on energy conservation and weighted energy consumption under operating conditions, the model formula is as follows: T = (C×80%) / [Σ(tᵢ×Iᵢ×10 -3 (i=1~5) Logic: The denominator is the user's average daily total energy consumption (μA converted to mAh). Based on battery characteristics, the discharge capacity will be greater than 80% of the total capacity, and the numerator is 80% of the actual usable capacity. The ratio represents the battery life (days, which can be converted to months / years); this formula provides the theoretical basis for subsequent battery calculations.

[0028] Analysis of key factors affecting Bluetooth power consumption: Through experimental testing, two core factors affecting the battery life of Bluetooth keys were identified: the working time and power consumption of Bluetooth in various modes. It is worth noting that there is an inherent contradiction between power consumption control and user experience for Bluetooth keys. Reducing power consumption often requires extending the signal broadcast interval, but this leads to slower connection speeds and increased positioning latency, thus affecting the user experience. Conversely, ensuring a high-quality user experience requires shortening the broadcast interval for fast connection and accurate positioning, but this significantly increases power consumption and shortens battery life. Therefore, the core challenge lies in balancing these two aspects. Furthermore, it should be noted that remote control distance is directly related to key power; the required remote control distance determines the basic threshold of key power. This patent does not focus on key power as a core optimization direction, but only on optimizing parameters related to connection time and positioning speed, based on the premise of meeting the power threshold required for conventional remote control distance. For the above two core influencing factors, tests were conducted using the controlled variable method to quantify the impact of different parameters on power consumption (key current) and user experience (connection speed, real-time positioning).

[0029] Power consumption analysis of transportation modes: From the time the key leaves the factory to the time it is assembled into the vehicle, it goes through a long process, including transportation to the lock factory, lock factory storage, lock factory assembly, transportation to a third-party warehouse, and storage in the third-party warehouse. Due to the vehicle assembly schedule, the key's time in this stage is not fixed, generally ranging from 2 to 6 months. A significant characteristic of this stage is that the key does not need to have any functions; it only needs to be able to learn and match during production line assembly. Therefore, this project will only retain the function of button wake-up followed by Bluetooth broadcasting in transportation mode, while disabling the motion sensor to avoid frequent key wake-up and further reduce power consumption in transportation mode. After testing, the current consumption in this mode and the battery life of the key in this mode are as follows: ; Sleep mode power consumption analysis: When normal vehicle users are resting at night or when the key is placed in a fixed position, the key will remain stationary for extended periods, typically ranging from 8 to 12 hours per day. In this scenario, the key does not need to perform any functions; it only needs to be able to be activated by picking up the key or pressing a button to function normally. Testing showed the following current consumption and battery life in this mode: ; Power consumption analysis in connection mode: Bluetooth keys are widely used when the vehicle is in motion, or when the user is carrying the key around the vehicle without needing to use it. In this case, the key does not need to be in a high-power positioning mode; it only needs to maintain a low-frequency heartbeat connection to ensure a timely response when the user needs to use the key. Therefore, it is necessary to determine the heartbeat cycle for a specific connection mode: ; Parameter selection conclusion: Test data shows that when the connection period is longer than 1 second, the current does not change significantly. A 1-second connection period, after testing, meets normal usage requirements for both remote control response time and key positioning switching speed. Therefore, 1 second is determined as the connection period for the connection mode. Broadcast mode power consumption analysis: The power consumption in Bluetooth key broadcast mode primarily depends on the broadcast interval of the Bluetooth key. The broadcast interval directly impacts user experience; a longer interval results in a longer connection distance but a worse user experience (an excessively long connection can prevent the user from controlling the vehicle promptly upon approaching it). This paper presents the connection time and key current data corresponding to several different broadcast cycles through 1000 repeated connection tests, as shown in the table below (with some formulas and testing methods included): ; Parameter selection conclusion: Considering user scenarios, Bluetooth communication distance in the vehicle, and walking speed, the time it takes for a user to walk from a distance to the point where they need to use the vehicle can be calculated. Through scenario testing, the time from a stable connection distance of 30m to walking 1m from the vehicle at a relatively fast pace (2m / s) is approximately 10s. Taking into account the impact of the surrounding environment on Bluetooth communication and fluctuations in connection time, this project sets a connection time of 5s as an internal control target. Based on low power consumption requirements, 200ms is selected as the optimal broadcast cycle interval; this choice directly reflects the balance between power consumption and user experience.

[0030] Positioning mode power consumption analysis: The core function of Bluetooth positioning is to determine the key's location (allowing unlocking / locking from outside the vehicle and starting from inside), requiring real-time positioning within 1 second. The positioning principle is as follows: the key periodically sends a positioning broadcast; the vehicle's Bluetooth module measures the broadcast field strength RSSI and uses a Kalman filter algorithm to combine the field strengths of various antennas to determine the key's location. By testing 100 different positioning broadcast cycles, the average key positioning speed and key current were obtained. The test data are as follows: ; Parameter selection conclusion: The conflict between power consumption and user experience in positioning scenarios mainly lies in the trade-off between positioning speed and current consumption. A 100ms positioning broadcast cycle can achieve the minimum requirement of positioning within 1 second, and the user experiences almost no difference, precisely balancing the conflict between positioning experience and power consumption control.

[0031] Bluetooth key working mode strategy optimization: After defining the parameters for various working modes of the Bluetooth key, a reasonable mode switching strategy needs to be developed. Before formulating the optimization strategy, the power consumption characteristics and battery life calculation results of the Bluetooth key's working modes before optimization must be clearly defined to provide a benchmark for optimization direction and effect verification. The Bluetooth key can switch to 5 working modes depending on the usage scenario.

[0032] Basic strategies for switching work modes: The usage environment for commercial vehicles differs significantly from that of passenger vehicles. Passenger vehicles are primarily used for commuting, i.e., going to and from get off work. Commercial vehicles, on the other hand, are used as production tools; people and vehicles are together most of the time. Commercial vehicle usage scenarios can be broadly categorized into the following four modes: Commuting mode (passenger vehicles only, not applicable to commercial vehicles): The core scenario is personal commuting to and from get off work, with short daily usage time (usually 1-2 hours) and long periods of vehicle parking; the key is used infrequently, with daily vehicle interaction time accounting for less than 20%, only needing to meet the basic control needs of daily short trips, which is completely inconsistent with the high-frequency use and long-term operation of commercial vehicles.

[0033] Delivery mode: The core scenario is multi-point delivery within the city. Couriers need to shuttle between different residential areas and office buildings every day, frequently opening and closing vehicle doors to sort, load and unload packages. The average daily vehicle interaction time accounts for more than 60%. The keys are mostly carried on the body and are in motion for a long time, only stopping when resting at night. The high power consumption mode occupies a long time.

[0034] Lalamove's model: mainly focuses on short-distance freight transportation. Users need to frequently accept orders and connect with cargo owners, resulting in many gaps while waiting for loading and unloading. The average daily driving time is about 8 hours, and the waiting time is 3-4 hours. During the waiting period, the keys are mostly left in the car or carried with the user. The vehicle frequently alternates between moving and stationary states, and the vehicle interaction time accounts for a moderate proportion.

[0035] Trunk logistics model: Focuses on long-distance intercity transportation, with a single trip taking 10-12 hours, with only short breaks at service areas along the way; users are highly connected to the vehicle, with the key carried almost the entire time, and the key is in a stable connection state during the journey, and placed still during rest, with a low percentage of vehicle interaction time but a long continuous connection time.

[0036] Based on the above strategies, the commonly used vehicle usage scenarios and power consumption estimates are as follows: ; The basic strategy and technical solution's battery life will cause great trouble and inconvenience to customers; Work mode switching strategy optimization: By precisely defining state switching rules for different scenarios, unnecessary high-power mode dwell time can be reduced, and sleep trigger latency can be shortened. The specific switching logic needs to achieve the following goals: Positioning mode is a high-energy-consuming mode, and its usage time should be minimized as much as possible. The mode switching strategy must not affect the user's driving experience.

[0037] The core of this strategy is mode switching based on user intent. Most of the time, the key is in a low-power connection mode. Upon detecting user intent, it quickly switches to a high-power positioning mode via Bluetooth to meet customer requirements for the vehicle. The Bluetooth key switches to positioning mode in the following user scenarios: When a user approaches the vehicle, Bluetooth switches from a disconnected state to a connected state to provide the customer with functions such as welcome greeting and proximity-based unlocking / locking.

[0038] When the user touches the door handle switch, it provides the PE unlocking and locking function required by the customer.

[0039] When the car door is opened, it provides functions such as key position detection, push-button start, and contactless start. Users can press the key button to remotely lock and unlock the doors, and remotely raise and lower the windows.

[0040] In the non-Ready (electric vehicle) / Engine OFF (gasoline vehicle) state, the user presses the brake to provide subsequent start-up function.

[0041] The key can operate in location mode for a maximum of 3 minutes, after which it will automatically exit. 3 minutes is sufficient for most car usage scenarios. During this time, the key's location information is provided in real-time to balance ease of use with power consumption. After 3 minutes, the key enters connection mode. If the user triggers any key-related function, the key will immediately switch back to location mode with a 2-second delay. The specific mode switching logic is shown in the diagram below: Based on optimized state switching logic, the battery range calculation results for various driving scenarios are as follows: ; The calculations above show that the optimized strategy significantly improves battery range across various driving scenarios. For commercial vehicles, the expected range is close to one year.

[0042] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for optimizing the power consumption of a car Bluetooth physical key, applied to a Bluetooth physical key including a Bluetooth module, a motion sensor, and buttons, characterized in that, The method includes: The working states of the Bluetooth physical key are divided into transportation mode, sleep mode, connection mode, broadcast mode, and positioning mode; The Bluetooth communication behavior of the physical key in each working mode is controlled according to preset power consumption optimization parameters. Based on user intent, the Bluetooth physical key is triggered to switch from the connection mode to the location mode, and after a preset timeout period in the location mode, it automatically switches back from the location mode to the connection mode. The definitions and switching principles for each working mode are as follows: In transport mode, the Bluetooth module and the motion sensor are turned off, and only the button wake-up function is retained; In sleep mode, the Bluetooth module is turned off, and the motion sensor and button wake-up function are turned on; In connection mode, the Bluetooth module establishes a connection with the vehicle and sends heartbeat packets at a preset connection interval; In broadcast mode, the Bluetooth module sends broadcast signals at a preset broadcast period; In positioning mode, the Bluetooth module sends broadcast signals for positioning at a preset positioning cycle; The mode switching principles include: Once the key in transport mode is successfully matched with the vehicle for the first time, it will enter broadcast mode. When the Bluetooth connection of the key in connection mode is lost, it enters broadcast mode. If it remains idle for a first preset time, it enters sleep mode. Once the key in broadcast mode establishes a Bluetooth connection with the vehicle, it enters location mode. If it remains stationary for the first preset time, it enters sleep mode. When the key in sleep mode detects a motion sensor signal, it enters broadcast mode; When a key in connection mode or location mode is left idle for the first preset time, it enters sleep mode.

2. The method according to claim 1, characterized in that, The transportation mode is activated after the Bluetooth physical key leaves the factory and terminates and switches to broadcast mode after the vehicle is successfully paired with the Bluetooth physical key for the first time.

3. The method according to claim 1, characterized in that, The sleep mode is activated after the Bluetooth physical key remains stationary for a period of time that reaches the first preset time, and exits and switches to broadcast mode when the motion sensor signal is detected or the button is triggered.

4. The method according to claim 1, characterized in that, The "user intent-based triggering" includes at least one of the following scenarios: The Bluetooth physical key was detected to have established a Bluetooth connection with the vehicle. The vehicle door handle switch has been triggered. The vehicle door was detected to be open. The button on the Bluetooth physical key was detected to be pressed; The system detected that the vehicle's brake pedal was pressed when the vehicle was not running.

5. The method according to claim 1, characterized in that, In the connection mode, when the vehicle is detected to be in a non-Park state, the Bluetooth physical key maintains or enters the connection mode.

6. A car Bluetooth physical key, characterized in that, include: Processor, memory, Bluetooth module, motion sensor, and buttons; The memory stores a computer program that, when executed by the processor, causes the Bluetooth physical key to perform the power consumption optimization method for automotive Bluetooth physical keys as described in any one of claims 1 to 5.

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