Battery management method and device of automobile, medium, equipment and vehicle

Abstract

The invention relates to an automobile battery management method and device, a medium, equipment and a vehicle. The method comprises the steps that whether the current working condition of a whole vehicle meets a preset standby entering condition or not is detected; when the standby entering condition is met, a characteristic signal of entering a standby mode is sent to the vehicle-mounted controller, so that the vehicle-mounted controller executes a preset behavior action, and the low-voltage storage battery enters the standby mode; wherein the behavior action comprises the step of closing a preset target function module with a low-voltage electricity demand. According to the technical scheme, the standby waiting time of the low-voltage storage battery can be prolonged.

Description

Technical Field

[0001] This disclosure relates to the field of automotive technology, and more particularly to a battery management method, apparatus, medium, device, and vehicle for automobiles. Background Technology

[0002] New energy vehicles require low-voltage batteries to meet the needs of electrical appliances when the vehicle is stationary and to provide initial energy when powered on. In scenarios such as battery standby or intelligent charging, environmental factors, vehicle operating conditions, and battery malfunctions often trigger the protection mechanism within the Low Voltage Battery Manager System (LBMS). This causes the low-voltage battery to actively disconnect its external discharge protection MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). Under these circumstances, the low-voltage energy network lacks energy supply, preventing the vehicle from starting and causing significant inconvenience to the user. Summary of the Invention

[0003] To address the aforementioned technical problems, this disclosure provides a battery management method, apparatus, medium, device, and vehicle for automobiles, thereby improving the standby time of low-voltage batteries and preventing the vehicle from failing to start due to power depletion.

[0004] This disclosure provides a battery management method for an automobile, the method comprising:

[0005] Check whether the current operating condition of the vehicle meets the preset conditions for entering standby;

[0006] When the conditions for entering standby are met, a characteristic signal for entering standby mode is sent to the vehicle controller, so that the vehicle controller performs a preset action and puts the low-voltage battery into standby mode.

[0007] The actions include: shutting down preset target function modules with low-voltage power demand.

[0008] In some embodiments, before detecting whether the current operating condition of the vehicle meets the preset standby conditions, the method further includes:

[0009] Determine whether the standby mode has been entered;

[0010] If the vehicle does not enter the standby mode, the current operating condition of the vehicle is checked to see if it meets the preset standby conditions.

[0011] If the vehicle has entered the standby mode, the system checks whether the current operating condition of the vehicle meets the preset conditions for exiting standby.

[0012] In some embodiments, before detecting whether the current operating condition of the vehicle meets the preset standby conditions, the method further includes:

[0013] When the conditions for exiting standby are met, the low-voltage battery is controlled by the vehicle controller to exit the standby mode.

[0014] In some embodiments, satisfying the preset standby conditions includes at least one of the following:

[0015] The cell temperature of the low-voltage battery is detected and it is determined that the cell temperature is lower than a first temperature value;

[0016] The system detects and determines that a first diagnostic fault code indicating that the protection circuit module is disconnected, and detects and determines that the state of charge of the low-voltage battery is higher than a first preset value; wherein, the protection circuit module is used to perform charge and discharge protection for the low-voltage battery.

[0017] Confirm that the user's command to enter standby mode has been received;

[0018] The state of charge of the power battery is detected and it is determined that the state of charge of the power battery is lower than a second preset value;

[0019] The detection revealed the presence of a second diagnostic fault code indicating a malfunction in the DC-DC converter.

[0020] In some embodiments, when a first diagnostic fault code indicating that the protection circuit module is disconnected is present and the state of charge of the low-voltage battery is higher than a first preset value, the action further includes controlling the protection circuit module to close.

[0021] In some embodiments, satisfying the preset exit standby conditions includes at least one of the following:

[0022] The cell temperature of the low-voltage battery is detected and it is determined that the cell temperature is higher than a second temperature value;

[0023] The state of charge of the low-voltage battery is detected, and it is determined that the state of charge of the low-voltage battery is higher than a fifth preset value, or the state of charge of the low-voltage battery is determined to be lower than a third preset value.

[0024] Confirm that the user's command to exit standby has been received;

[0025] The state of charge of the power battery is detected and it is determined that the state of charge of the power battery is higher than a fourth preset value.

[0026] The test determined that there was no second diagnostic fault code indicating a fault in the DC-DC converter.

[0027] In some embodiments, detecting whether the current operating condition of the vehicle meets preset standby conditions includes:

[0028] After the low-voltage power management system wakes up at preset time intervals, it checks whether the current operating condition of the vehicle meets the preset standby conditions.

[0029] This disclosure provides a battery management method for an automobile, the method comprising:

[0030] Receive a characteristic signal from the low-voltage power management system indicating entry into standby mode; wherein, the characteristic signal is generated by the low-voltage power management system when it detects that the current operating condition of the vehicle meets the preset entry into standby conditions;

[0031] Based on the characteristic signal, a preset action is executed and the low-voltage battery is put into standby mode; wherein, the action includes: shutting down a preset target function module with low-voltage power demand.

[0032] In some embodiments, receiving a characteristic signal from the low-voltage power management system indicating entry into standby mode includes:

[0033] After being woken up by an NM message sent by the low-voltage power management system, it receives a characteristic signal from the low-voltage power management system indicating that it has entered standby mode.

[0034] In some embodiments, when the state of charge of the low-voltage battery is lower than a third preset value, the method further includes:

[0035] The wireless communication module is activated to send a rescue signal to a preset terminal via the wireless communication module.

[0036] This disclosure provides a battery management device for an automobile, the device comprising:

[0037] The condition detection module is used to detect whether the current operating condition of the vehicle meets the preset conditions for entering standby mode.

[0038] The signal transmitting module is used to send a characteristic signal of entering standby mode to the vehicle controller when the standby conditions are met, so that the vehicle controller performs a preset action and puts the low-voltage battery into standby mode.

[0039] The actions include: shutting down preset target function modules with low-voltage power demand.

[0040] This disclosure provides a battery management device for an automobile, the device comprising:

[0041] The signal receiving module is used to receive a characteristic signal of entering standby mode from the low-voltage power management system; wherein, the characteristic signal is generated by the low-voltage power management system when it detects that the current operating condition of the vehicle meets the preset standby conditions;

[0042] The mode entry module is used to perform a preset action based on the feature signal and put the low-voltage battery into standby mode; wherein, the action includes: shutting down a preset target function module with low-voltage power demand.

[0043] This disclosure also provides a computer-readable storage medium that stores a program or instructions that cause a computer to perform the steps of any of the above methods.

[0044] This disclosure also provides an electronic device, including:

[0045] One or more processors;

[0046] Memory, used to store one or more programs or instructions;

[0047] The processor executes the steps of any of the above methods by calling programs or instructions stored in the memory.

[0048] This disclosure also provides a vehicle, including: a battery management device for an automobile as described above.

[0049] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0050] The technical solution provided in this disclosure detects whether the current operating condition of the vehicle meets preset standby conditions. When the standby conditions are met, a characteristic signal for entering standby mode is sent to the vehicle controller, causing the vehicle controller to execute preset actions and put the low-voltage battery into standby mode. These actions include shutting down preset target functional modules with low-voltage power requirements. Under the operation of the LBMS and the vehicle controller, this technical solution assesses whether the low-voltage battery meets standby conditions by detecting the current operating condition of the vehicle, considering factors such as the environment, vehicle operation, and battery status. When the standby conditions are met, the vehicle controller executes actions to control the low-voltage battery to enter a low-power standby mode. In standby mode, shutting down target functional modules effectively maximizes the duration of the low-voltage battery's basic functions. This extended low-voltage battery operating time through the low-power standby mode delays the disconnection time of the protection circuit module, thus delaying the vehicle's inability to operate normally due to power depletion and ensuring normal vehicle startup. Attached Figure Description

[0051] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0052] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 A flowchart illustrating a battery management method for an automobile provided in this embodiment of the disclosure;

[0054] Figure 2 A schematic diagram illustrating the conditions for entering and exiting standby mode according to an embodiment of this disclosure;

[0055] Figure 3 A flowchart illustrating another battery management method for automobiles provided in this disclosure embodiment;

[0056] Figure 4 A flowchart illustrating another battery management method for automobiles provided in this disclosure embodiment;

[0057] Figure 5 A structural block diagram of a battery management device for an automobile provided in an embodiment of this disclosure;

[0058] Figure 6 A structural block diagram of another automotive battery management device provided in an embodiment of this disclosure;

[0059] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this disclosure. Detailed Implementation

[0060] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0061] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0062] In new energy vehicles, the state of charge (SOC) of the low-voltage battery (hereinafter referred to as the battery) gradually decreases over time. When it exceeds a certain set threshold, the LBMS will wake up the vehicle and request charging. In scenarios such as battery standby or intelligent charging, environmental factors, vehicle operating conditions, and abnormal faults often trigger the LBMS's internal protection mechanism. To prevent overcharging or over-discharging of the battery, it will actively disconnect the external discharge protection MOSFET (hereinafter referred to as MOS) for safety reasons, resulting in no energy supply to the low-voltage power network. In this situation, when the owner tries to start the vehicle remotely, the vehicle cannot operate normally, and the user cannot enter the vehicle. They must rely on repair experts, a roadside assistance vehicle, or a portable power source for assistance, causing significant inconvenience. Therefore, this disclosure provides a battery management method, device, medium, equipment, and vehicle for automobiles.

[0063] Figure 1 This is a flowchart illustrating a battery management method for an automobile, provided as an embodiment of this disclosure. This method is applicable to electric vehicles such as range-extended electric vehicles, pure electric vehicles, and fuel cell vehicles. It manages the vehicle's battery to control the energy distribution of the vehicle's functional modules, close the battery's protection circuit module, and achieve long-term standby operation for basic battery functions by delaying the MOS (Metal Oxide Switch) disconnection time when standby conditions are met. This method can be applied to an LBMS (Battery Management System) and executed by a battery management device configured within the LBMS. This battery management device can be implemented using software and / or hardware. Figure 1 As shown, the method includes the following steps:

[0064] S102. Check whether the current operating condition of the vehicle meets the preset conditions for entering standby.

[0065] In this embodiment, when the vehicle is powered off, i.e., the power supply is in the OFF position, the LBMS can automatically wake up at preset time intervals. In other words, the LBMS can automatically wake up from hibernation according to a pre-configured wake-up time. After waking up at the preset time interval, the LBMS checks whether the current operating condition of the vehicle meets the preset standby conditions; for example, the LBMS wakes up every two hours and checks whether the current operating condition of the vehicle meets the preset standby conditions. The current operating condition represents information such as the environment, vehicle operating status, and battery status, and may include: environmental conditions, vehicle operating status, and battery status. Specifically, environmental conditions include the temperature of the vehicle's surroundings; vehicle operating status includes the power-on or power-off state, power supply position, and DC-DC converter operation; and battery status includes the charge level and state of charge (SOC) of the low-voltage battery and power battery.

[0066] In this embodiment, the standby entry condition is the condition that allows the low-voltage battery to enter standby mode. This condition can be obtained by configuring environmental conditions, vehicle conditions, and battery status conditions separately. Based on this, in some possible embodiments, detecting the current operating condition of the vehicle may include, but is not limited to: detecting the cell temperature of the low-voltage battery, detecting the state of charge of the low-voltage battery, detecting the state of charge of the power battery, detecting the presence of a first diagnostic fault code indicating that the protection circuit module is disconnected, and detecting the presence of a second diagnostic fault code indicating that the DC-DC converter (DCDC) has malfunctioned. The aforementioned protection circuit module refers to a module used for charging and discharging protection of the low-voltage battery, such as including the internal MOS switch of the low-voltage battery.

[0067] Furthermore, to give users more control over battery management and meet their individual needs, this embodiment can also grant users the authority to control the battery to enter standby mode. Therefore, detecting the vehicle's current operating status can include: listening for whether a user-inputted command to enter standby mode has been received.

[0068] Reference Figure 2 Based on the above embodiments, satisfying the preset standby conditions may include at least one of the following examples a1 to a5:

[0069] Example a1: Detect the cell temperature of a low-voltage battery and determine that the cell temperature is lower than a first temperature value; if the cell temperature is lower than the first temperature value, it is T < -20℃.

[0070] Example a2: A first diagnostic fault code indicating a disconnection of the protection circuit module is detected, and the state of charge (SOC) of the low-voltage battery is detected and determined to be higher than a first preset value. The protection circuit module is used to provide charge and discharge protection for the low-voltage battery. The first diagnostic fault code is a DTC (Diagnostic Trouble Code) generated after the protection circuit module disconnects; the state of charge (SOC) is the ratio of the remaining capacity of a battery after a period of use or long-term storage to its fully charged capacity, usually expressed as a percentage; a low-voltage battery's SOC being higher than the first preset value is, for example, LBMS_SOC > 20%.

[0071] Example a3: Confirm that a user input command to enter standby mode has been received.

[0072] Example a4: Detect the state of charge (SOC) of the power battery and determine that the SOC is lower than a second preset value; for example, BMS_SOC < 10%.

[0073] Example a5: The presence of a second diagnostic fault code indicating a failure in the DC switch is determined by detection.

[0074] According to the above embodiments, when the power supply is in the OFF position, after the low-voltage power management system wakes up, it checks whether the current operating condition of the vehicle meets at least one of the above-mentioned standby conditions. If the standby conditions are not met, it indicates that the environment, vehicle operating condition, and low-voltage battery can support the normal operation of the vehicle, and there is no need to enter standby mode. If the standby conditions are met, the low-voltage battery is controlled to enter standby mode according to the following embodiments.

[0075] S104. When the standby conditions are met, a characteristic signal for entering standby mode is sent to the vehicle controller so that the vehicle controller performs a preset action and puts the low-voltage battery into standby mode; wherein, the action performed may include at least: shutting down a preset target function module with low-voltage power demand.

[0076] In this embodiment, when the LBMS determines that at least one of the standby conditions is met, it sends a characteristic signal for entering standby mode and an NM (Network Management) message for waking up the vehicle controller (XCU). After being woken up by the NM message, the vehicle controller receives the aforementioned characteristic signal for entering standby mode. Then, based on the characteristic signal, the vehicle controller performs the action to enter standby mode, thereby putting the low-voltage battery into standby mode.

[0077] The following is an example of the action to enter standby mode:

[0078] The preset target functional modules with low-voltage power requirements are shut down. In one example, all functional modules except the Bluetooth module, DC-DC converter, and LBMS are set as target functional modules with low-voltage power requirements. Therefore, all target functional modules except the Bluetooth module, DC-DC converter, and LBMS are forcibly shut down. This embodiment can control the rational distribution of vehicle energy by shutting down target functional modules with low-voltage power requirements and retaining only essential functions such as the Bluetooth module, DC-DC converter, and LBMS, in the event of abnormal environmental conditions, vehicle conditions, and battery conditions. This avoids the target functional modules consuming power from the low-voltage battery, allowing the low-voltage battery to maintain only a few essential functions, maximizing power savings and improving the low-voltage battery's standby time.

[0079] In one embodiment, when a first diagnostic fault code indicating that the protection circuit module is disconnected is present, and the state of charge of the low-voltage battery is higher than a first preset value, the action may further include: controlling the protection circuit module to close, specifically, closing the MOS switch of the protection circuit module inside the low-voltage battery. In this embodiment, the presence of the first diagnostic fault code indicates that the protection circuit module has been disconnected, and the state of charge of the low-voltage battery is higher than the first preset value (e.g., 20%), indicating that the current charge of the low-voltage battery is sufficient to maintain standby mode. Therefore, the protection circuit module is controlled to close, ensuring that the low-voltage battery can supply energy. By controlling the protection circuit module to close, this embodiment ensures that the MOS switch remains closed for a long time in the low-power standby mode, effectively delaying the phenomenon of the vehicle failing to start due to the MOS switch opening.

[0080] After the low-voltage battery enters standby mode, this embodiment may further include: after a preset duration of time since the low-voltage battery entered standby mode, the LBMS enters hibernation. In this embodiment, after performing actions such as shutting down the target function module and closing the MOS switch, i.e., after the low-voltage battery enters standby mode, no signals will be transmitted from the vehicle's CAN bus to the LBMS. Therefore, after a preset duration of no signal reception (e.g., 15 seconds), the LBMS can automatically enter hibernation. The hibernation state of the LBMS further reduces the power consumption of the low-voltage battery.

[0081] This embodiment enables the low-voltage battery to enter a low-power standby mode by performing the above actions. In standby mode, the target function module is turned off, the MOS switch is closed, and the LBMS enters hibernation, effectively improving the standby waiting time of the low-voltage battery. In this case, when the state of charge of the low-voltage battery slowly decreases over time, the low-power standby mode can extend the working time of the low-voltage battery and delay the disconnection time of the MOS switch.

[0082] The battery management method for automobiles provided in this embodiment involves the LBMS detecting whether the current operating condition of the vehicle meets preset standby conditions. When the standby conditions are met, a characteristic signal for entering standby mode is sent to the vehicle controller, causing the vehicle controller to execute preset actions and put the low-voltage battery into standby mode. These actions include shutting down preset target functional modules with low-voltage power requirements. This technical solution, under the operation of the LBMS and the vehicle controller, assesses whether the low-voltage battery meets standby conditions by detecting the current operating condition of the vehicle, considering factors such as the environment, vehicle operation, and battery status. When the standby conditions are met, the vehicle controller executes actions to control the low-voltage battery to enter a low-power standby mode. In standby mode, shutting down target functional modules effectively maximizes the duration of the low-voltage battery's basic functions. This extended low-voltage battery operating time through the low-power standby mode delays the disconnection time of the protection circuit module, thus delaying the situation where the vehicle enters a power-depleted state and cannot operate normally, ensuring the vehicle can start normally.

[0083] After the low-voltage power management system is woken up, before detecting whether the current operating condition of the vehicle meets the preset standby conditions, the method provided in this embodiment may further include:

[0084] Determine whether the standby mode has been entered; if the standby mode has not been entered, check whether the current operating condition of the vehicle meets the preset conditions for entering standby; if the standby mode has been entered, check whether the current operating condition of the vehicle meets the preset conditions for exiting standby.

[0085] As an example, a status value indicating whether standby mode has been entered or not can be read to determine whether standby mode has been entered. For example, a status value of 0 indicates that standby mode has not been entered, and a status value of 1 indicates that standby mode has been entered. If the status value is 0, i.e., standby mode has not been entered, then it is checked whether the current operating condition of the vehicle meets the preset standby entry conditions; if the status value is 1, i.e., standby mode has been entered, then it is checked whether the current operating condition of the vehicle meets the preset standby exit conditions.

[0086] like Figure 2 As shown, in this embodiment, the preset exit standby conditions may include at least one of the following examples b1 to b5, and the exit standby conditions b1 to b5 correspond one-to-one with the entry standby conditions a1 to a5.

[0087] Example b1: Detect the cell temperature of a low-voltage battery and determine that the cell temperature is higher than a second temperature value; the cell temperature being higher than the second temperature value is, for example, T > -18℃.

[0088] Example b2: Detect the state of charge (SOC) of the low-voltage battery and determine whether the SOC is higher than the fifth preset value, or whether the SOC is lower than the third preset value. An SOC higher than the fifth preset value is defined as: LBMS_SOC > 95%, or LBMS_SOC = 100%, etc.; an SOC lower than the third preset value is defined as: LBMS_SOC < 10%.

[0089] Example b3: Confirm that a user-inputted exit standby command has been received; the exit standby command may be, for example, the Bluetooth key waking up the vehicle, or the operation of a preset interface issuing an exit standby command, etc., and is not limited here.

[0090] Example b4: Detect the state of charge of the power battery and determine that the state of charge of the power battery is higher than the fourth preset value; for example, BMS_SOC > 20%.

[0091] Example b5: The detection determines that there is no second diagnostic fault code used to indicate a failure in the DC switch.

[0092] Based on the above embodiments, the embodiments for entering standby mode and exiting standby mode will be described in detail below.

[0093] Using the examples of entering standby conditions a1 to a5 and exiting standby conditions b1 to b5 as described above, in this embodiment, the detection of whether the current operating condition of the vehicle meets the preset entry standby conditions can be referred to the following.

[0094] Example a1. The LBMS detects whether the cell temperature of the low-voltage battery is lower than a first temperature value.

[0095] Specifically, in the OFF position, the LBMS automatically wakes up at preset time intervals whenever the wake-up time set by the clock chip is reached. After waking up, the LBMS can detect the cell temperature of its own low-voltage battery. If the detected cell temperature is lower than a first temperature value, such as T < -20°C, and this condition persists for a certain period of time (e.g., 10 seconds), and the battery is not currently in standby mode, then the standby entry condition is determined to be met. The condition of the cell temperature remaining lower than the first temperature value for a certain period of time in this embodiment is set to avoid false detections and improve the accuracy of determining the standby entry condition.

[0096] In this scenario, the LBMS sends a characteristic signal indicating entry into standby mode to the vehicle controller, and sends NM messages to the vehicle controller at a preset frequency (e.g., once every 100 milliseconds) for a certain period of time (e.g., 15 seconds). The vehicle controller is awakened by the NM messages and receives the characteristic signal. Then, the vehicle controller shuts down preset target function modules with low-voltage power requirements, completing the above actions to indicate that the low-voltage battery has entered standby mode. Subsequently, the low-voltage power management system enters hibernation, reducing the power consumption of the LBMS itself and further reducing the power consumption of the low-voltage battery.

[0097] Example a2. The LBMS detects the presence of a first diagnostic fault code indicating a disconnection of the protection circuit module, and detects whether the state of charge of the low-voltage battery is higher than a first preset value.

[0098] Specifically, in the OFF position, after autonomous wake-up at preset time intervals, the LBMS can read the DTC codes indicating the status of the protection circuit module from the designated data storage location. Typically, a DTC code of 0 indicates the protection circuit is closed, and a DTC code of 1 indicates the protection circuit is open. Therefore, the first diagnostic fault code indicating the protection circuit module is open can be a DTC code with a value of 1.

[0099] Additionally, the LBMS detects whether the state of charge of the low-voltage battery is higher than a first preset value, such as: LBMS_SOC > 20%.

[0100] If a first diagnostic fault code is detected, and the state of charge (SCC) of the low-voltage battery is higher than a first preset value for a preset duration (e.g., 15 seconds), and the battery is not currently in standby mode, then the standby entry conditions are met. In this case, the control protection circuit module closes, the LBMS sends a characteristic signal for entering standby mode to the vehicle controller, and continuously sends NM messages to the vehicle controller for a certain period of time. The vehicle controller is awakened by the NM message and receives the characteristic signal. Then, the vehicle controller executes a preset action to put the low-voltage battery into standby mode.

[0101] Example a3. LBMS detects whether it has received a user-input command to enter standby mode.

[0102] Specifically, a selectable interface is provided on the HU (Head Unit) screen, allowing users to manually issue a standby command. In a real-world scenario, the LBMS detects the standby command input by the user through the interface on the HU screen and determines that the standby conditions are met. After the vehicle is powered off and enters the OFF position, the LBMS sends a characteristic signal for entering standby mode and an NM message to the vehicle controller. Upon being awakened by the NM message, the vehicle controller executes the standby mode action based on the characteristic signal. This embodiment provides an open interface for the user, allowing them to actively choose to put the low-voltage battery into a power-saving standby mode.

[0103] Example a4. The LBMS detects whether the state of charge of the power battery is lower than a second preset value.

[0104] Specifically, in the OFF position, after autonomous wake-up, the LBMS can detect whether the state of charge (SOC) of the power battery is lower than a second preset value according to a preset time interval. If the LBMS detects that the SOC of the power battery is lower than the second preset value, such as BMS_SOC < 10%, and the SOC of the power battery remains lower than the second preset value for a preset duration (e.g., 15 seconds), and it is not currently in standby mode, it is determined that the standby conditions are met. In this case, the LBMS sends a characteristic signal for entering standby mode and an NM message to the vehicle controller. After being woken up by the NM message, the vehicle controller executes the action of entering standby mode based on the characteristic signal.

[0105] Example a5. The LBMS detects the presence of a second diagnostic fault code indicating a fault in the DC-DC converter.

[0106] Specifically, in the OFF position, after autonomously waking up at preset time intervals, the LBMS can detect whether a second diagnostic fault code indicating a DC-DC converter malfunction exists in a designated data storage location. If this second diagnostic fault code exists, it indicates that the DC-DC converter has malfunctioned, and since it is not currently in standby mode, the standby entry conditions are met. In this case, the LBMS sends a characteristic signal for entering standby mode and an NM message to the vehicle controller. After being woken up by the NM message, the vehicle controller executes the standby mode entry action based on the characteristic signal.

[0107] It is understood that two or more of the above-mentioned standby conditions can be met simultaneously. For example, the standby conditions corresponding to examples a1 and a2 can be detected simultaneously. Furthermore, when a first diagnostic fault code indicating a disconnected protection circuit module is detected, and when the state of charge of the low-voltage battery is detected to be higher than a first preset value, the vehicle controller performs preset actions that, in addition to shutting down preset target function modules with low-voltage power requirements, also include controlling the protection circuit module to close. Thus, in standby mode, the protection circuit module used for charging and discharging protection of the low-voltage battery is in a closed state, enabling the low-voltage battery to supply energy.

[0108] In this embodiment, the detection of whether the current operating condition of the vehicle meets the preset exit standby conditions can be referred to in the following examples.

[0109] Example b1. The LBMS detects whether the cell temperature of the low-voltage battery is higher than a second temperature value.

[0110] Specifically, in the OFF position, the LBMS automatically wakes up at preset time intervals whenever the wake-up time set by the clock chip is reached. After waking up, the LBMS can detect the cell temperature of its own low-voltage battery. If the detected cell temperature is higher than a second temperature value, such as T > -18℃, and the cell temperature remains higher than the second temperature value for a preset duration, and the battery is currently in standby mode, then the conditions for exiting standby are met.

[0111] In this scenario, the LBMS sends a characteristic signal to the vehicle controller indicating that it is exiting standby mode, and also sends NM messages to the vehicle controller at a preset frequency for a certain period of time. After being awakened by the NM messages, the vehicle controller receives the characteristic signal indicating that it is exiting standby mode. Then, it controls the low-voltage battery to exit standby mode via the vehicle controller, thus controlling the normal operation of the entire vehicle.

[0112] Accordingly, if the detected cell temperature is not higher than the second temperature value, it is determined that the conditions for exiting standby are not met, and the low-voltage battery is kept in standby mode.

[0113] Example b2. The LBMS detects whether the state of charge (SOC) of the low-voltage battery is higher than the fifth preset value, or whether the SOC of the low-voltage battery is lower than the third preset value.

[0114] If the state of charge (SOC) of the low-voltage battery is higher than the fifth preset value, it indicates that the low-voltage battery has sufficient charge and meets the conditions for exiting standby mode, allowing the vehicle to operate normally. If the SOC of the low-voltage battery is lower than the third preset value, it indicates that the SOC of the low-voltage battery is too low to support standby waiting, requiring roadside assistance. In this case, standby mode is no longer suitable, and the conditions for exiting standby mode can be determined. When the above conditions for exiting standby mode are met and maintained for a preset duration, the vehicle controller will control the low-voltage battery to exit standby mode.

[0115] If the detected state of charge of the low-voltage battery is neither higher than the fifth preset value nor lower than the third preset value, it is determined that the conditions for exiting standby mode are not met. When the conditions for exiting standby mode are not met, the low-voltage battery remains in standby mode.

[0116] When the state of charge of the low-voltage battery is lower than a third preset value, this embodiment may include: the vehicle controller waking up the wireless communication module to send a rescue signal to a preset terminal through the wireless communication module; the preset terminal is, for example, a mobile phone, computer or other terminal corresponding to after-sales maintenance personnel, rescue personnel and / or emergency contacts.

[0117] This embodiment sends a rescue signal to a preset terminal, allowing the vehicle to autonomously send a rescue signal when its energy is insufficient. This enables users to receive the rescue signal and prepare for rescue in advance, ensuring the reliability and timeliness of external rescue in extreme situations.

[0118] Example b3. The LBMS detects whether it has received a user-inputted command to exit standby mode. If it receives the command, it determines that the conditions for exiting standby mode are met and controls the low-voltage battery to exit standby mode via the vehicle controller.

[0119] Example b4. The LBMS detects whether the state of charge of the power battery is higher than the fourth preset value. If it is higher than the fourth preset value and continues for a preset time, it is determined that the standby exit condition is met, and the low-voltage battery is controlled to exit the standby mode through the vehicle controller; if it is not higher than the fourth preset value, it is determined that the standby exit condition is not met, and the low-voltage battery remains in standby mode.

[0120] Example b5. The LBMS checks for the presence of a second diagnostic fault code indicating a DC-DC converter malfunction. If the second diagnostic fault code is not present, it indicates that the DC-DC converter is functioning normally, and the standby exit condition is met. The low-voltage battery is then controlled to exit standby mode via the vehicle controller. If the second diagnostic fault code is present, it indicates that the standby exit condition is not met, and the low-voltage battery remains in standby mode.

[0121] It is understandable that during the actual testing of the vehicle under its current operating conditions, the testing content shown in the above examples can be performed simultaneously. Furthermore, for the sake of brevity, the content omitted from the above examples can be referred to the foregoing embodiments.

[0122] In summary, the battery management method for automobiles provided in this embodiment, after the LBMS is woken up, indicates an abnormality in the environment, vehicle operating status, and battery status when the current operating condition of the vehicle meets the conditions for entering standby. In this case, the vehicle controller executes preset actions to put the low-voltage battery into standby mode. Among the actions executed upon entering standby mode, preset target functional modules with low-voltage power requirements are shut down. This avoids the target functional modules consuming power from the low-voltage battery, controls the rational allocation of vehicle energy, and ensures that the low-voltage battery only needs to maintain the operation of a few essential functions, maximizing power savings and extending the standby time of the low-voltage battery. Furthermore, the actions may include controlling the closure of a protection circuit module for charging and discharging protection of the low-voltage battery, which enables the low-voltage battery to supply energy. Thus, by extending the operating time of the low-voltage battery through a low-power standby mode and delaying the disconnection time of the protection circuit module, the vehicle is prevented from entering a power-depleted state and failing to operate normally. Therefore, this technical solution, based on the hardware and software resources of the LBMS and on-board controller, controls the energy distribution of the entire vehicle under abnormal scenarios that meet the conditions for entering standby mode. This allows for the prolonged closure of the internal MOS switch of the battery, enabling the battery to maintain basic standby functions for extended periods and ensuring the vehicle can start normally. This effectively prevents new energy vehicles from entering a state of battery depletion after prolonged storage, reduces the need for maintenance services, improves the user experience, increases the efficiency of emergency rescue, enhances the cost-effectiveness of after-sales personnel at offline stores, and significantly reduces the operating costs of stores while increasing vehicle reliability.

[0123] Figure 3 This is a flowchart illustrating another automotive battery management method provided in an embodiment of this disclosure. This method can be applied to an on-board controller and executed by a battery management device of the vehicle configured on the on-board controller. This battery management device can be implemented in software and / or hardware. Figure 3 As shown, the method includes the following steps:

[0124] S302, The vehicle controller receives a characteristic signal from the low-voltage power management system indicating that it has entered standby mode; wherein, the characteristic signal is generated by the low-voltage power management system when it detects that the current operating condition of the vehicle meets the preset standby conditions.

[0125] In this embodiment, when the power supply is in the OFF position, the LBMS wakes up at preset time intervals and checks whether the current operating condition of the vehicle meets preset standby conditions. When it is determined that at least one standby condition is met, the LBMS sends a characteristic signal for entering standby mode and an NM message for waking up the vehicle controller to the vehicle controller. After being woken up by the NM message sent by the LBMS, the vehicle controller receives the characteristic signal for entering standby mode from the LBMS.

[0126] S304. Execute a preset action based on the feature signal and put the low-voltage battery into standby mode; wherein, the action includes, but is not limited to: shutting down a preset target function module with low-voltage power demand.

[0127] Based on the above embodiments, a method is provided herein as follows: Figure 4 The battery management method for the vehicle shown includes the following steps.

[0128] S402, The vehicle controller receives a characteristic signal from the LBMS indicating that it has entered standby mode.

[0129] S404, The vehicle controller shuts down the preset target function modules with low-voltage power requirements.

[0130] S406, the vehicle controller determines whether the power supply position is OFF, or in other words, whether the power supply position is ACC or ON. ACC indicates the vehicle is parked, ON indicates the vehicle is powered on, and OFF indicates the vehicle is powered off.

[0131] S408. If the power position is ACC or ON, the low-voltage battery will exit standby mode via the vehicle controller.

[0132] S410. If the power setting is OFF, when the LBMS wakes up automatically, the LBMS checks whether the state of charge of the low-voltage battery is not lower than a third preset value. The third preset value is the minimum state of charge required to maintain the low-voltage battery in standby mode; it is generally a small value, such as 10%.

[0133] S412. When the state of charge of the low-voltage battery is lower than the third preset value, the vehicle controller wakes up the wireless communication module to send a rescue signal to a preset terminal through the wireless communication module.

[0134] S414. When the state of charge of the low-voltage battery is not lower than the third preset value, control the closing of the protection circuit module used for charging and discharging protection of the low-voltage battery. This step means that when the vehicle is powered off and the state of charge of the low-voltage battery is not lower than the third preset value, control the closing of the protection circuit module used for charging and discharging protection of the low-voltage battery.

[0135] After S416 and LBMS autonomously wake up according to the preset time interval, they read the status value indicating that they have entered standby mode and check whether the current operating condition of the vehicle meets the preset conditions for exiting standby.

[0136] If the conditions for exiting standby are met, step S408 is executed, and the low-voltage battery is controlled to exit standby mode via the vehicle controller; if the conditions for exiting standby are not met, the process returns to step S404 and continues to keep the low-voltage battery in standby mode.

[0137] The vehicle battery management method provided in the above embodiments involves the vehicle controller receiving a characteristic signal from the LBMS indicating entry into standby mode; based on the characteristic signal, executing a preset action to put the low-voltage battery into standby mode; wherein the action includes at least: shutting down preset target functional modules with low-voltage power consumption needs. This solution controls the low-voltage battery to enter a low-power standby mode by executing the above actions through the vehicle controller, effectively maximizing the duration of the low-voltage battery's basic functions, preventing the vehicle from entering a state of power depletion and failing to operate normally, and ensuring the vehicle can start normally.

[0138] Corresponding to the battery management method for automobiles provided in the embodiments of this disclosure, the embodiments of this disclosure also provide a battery management device for automobiles, which can be applied to LBMS. Figure 5 A structural block diagram of a battery management device for a car provided in an embodiment of this disclosure, such as... Figure 5 As shown, the battery management device of the car includes:

[0139] The condition detection module 510 is used to detect whether the current operating condition of the vehicle meets the preset conditions for entering standby.

[0140] The signal transmitting module 520 is used to send a characteristic signal of entering standby mode to the vehicle controller when the standby conditions are met, so that the vehicle controller performs a preset action and puts the low-voltage battery into standby mode.

[0141] The actions include: shutting down preset target function modules with low-voltage power demand.

[0142] In some embodiments, the apparatus further includes a mode determination module, which is used to:

[0143] Determine whether the standby mode has been entered;

[0144] If the vehicle does not enter the standby mode, the current operating condition of the vehicle is checked to see if it meets the preset standby conditions.

[0145] If the vehicle has entered the standby mode, the system checks whether the current operating condition of the vehicle meets the preset conditions for exiting standby.

[0146] In some embodiments, the apparatus further includes a mode exit module, which is used to:

[0147] When the conditions for exiting standby are met, the low-voltage battery is controlled by the vehicle controller to exit the standby mode.

[0148] In some embodiments, satisfying the preset standby conditions includes at least one of the following:

[0149] The cell temperature of the low-voltage battery is detected and it is determined that the cell temperature is lower than a first temperature value;

[0150] The system detects and determines that a first diagnostic fault code indicating that the protection circuit module is disconnected, and detects and determines that the state of charge of the low-voltage battery is higher than a first preset value; wherein, the protection circuit module is used to perform charge and discharge protection for the low-voltage battery.

[0151] Confirm that the user's command to enter standby mode has been received;

[0152] The state of charge of the power battery is detected and it is determined that the state of charge of the power battery is lower than a second preset value;

[0153] The detection revealed the presence of a second diagnostic fault code indicating a malfunction in the DC-DC converter.

[0154] In some embodiments, when a first diagnostic fault code indicating that the protection circuit module is disconnected is present and the state of charge of the low-voltage battery is higher than a first preset value, the action further includes controlling the protection circuit module to close.

[0155] In some embodiments, satisfying the preset exit standby conditions includes at least one of the following:

[0156] The cell temperature of the low-voltage battery is detected and it is determined that the cell temperature is higher than a second temperature value;

[0157] The state of charge of the low-voltage battery is detected, and it is determined that the state of charge of the low-voltage battery is higher than a fifth preset value, or the state of charge of the low-voltage battery is determined to be lower than a third preset value.

[0158] Confirm that the user's command to exit standby has been received;

[0159] The state of charge of the power battery is detected and it is determined that the state of charge of the power battery is higher than a fourth preset value.

[0160] The test determined that there was no second diagnostic fault code indicating a fault in the DC-DC converter.

[0161] In some embodiments, the condition detection module 510 is specifically used for:

[0162] After the low-voltage power management system wakes up at preset time intervals, it checks whether the current operating condition of the vehicle meets the preset standby conditions.

[0163] Corresponding to the battery management method for automobiles provided in the embodiments of this disclosure, the embodiments of this disclosure also provide a battery management device for automobiles, which can be applied to an on-board controller. Figure 6 A structural block diagram of a battery management device for a car provided in an embodiment of this disclosure, such as... Figure 6 As shown, the battery management device of the car includes:

[0164] The signal receiving module 610 is used to receive a characteristic signal of entering standby mode from the low-voltage power management system; wherein, the characteristic signal is generated by the low-voltage power management system when it detects that the current operating condition of the vehicle meets the preset standby conditions;

[0165] The mode entry module 620 is used to perform a preset action based on the feature signal and put the low-voltage battery into standby mode; wherein, the action includes: turning off the preset target function module with low-voltage power demand.

[0166] In some embodiments, the signal receiving module 610 is specifically used for:

[0167] After being woken up by an NM message sent by the low-voltage power management system, it receives a characteristic signal from the low-voltage power management system indicating that it has entered standby mode.

[0168] In some embodiments, the apparatus further includes a wake-up module, which is used to:

[0169] The wireless communication module is activated to send a rescue signal to a preset terminal via the wireless communication module.

[0170] The automotive battery management device disclosed in the above embodiments can execute the automotive battery management method disclosed in the above embodiments and has the same or corresponding beneficial effects. To avoid repetition, it will not be described again here.

[0171] This disclosure also provides a vehicle, including: a battery management device for an automobile as described above.

[0172] This disclosure also provides a computer-readable storage medium storing a program or instructions that cause a computer to perform the steps of any of the above methods:

[0173] Check whether the current operating condition of the vehicle meets the preset conditions for entering standby;

[0174] When the conditions for entering standby are met, a characteristic signal for entering standby mode is sent to the vehicle controller, so that the vehicle controller performs a preset action and puts the low-voltage battery into standby mode.

[0175] The actions include: shutting down preset target function modules with low-voltage power demand.

[0176] Alternatively, embodiments of this disclosure also provide a computer-readable storage medium storing a program or instructions that cause a computer to perform the steps of any of the methods described above:

[0177] Receive a characteristic signal from the low-voltage power management system indicating entry into standby mode; wherein, the characteristic signal is generated by the low-voltage power management system when it detects that the current operating condition of the vehicle meets the preset entry into standby conditions;

[0178] Based on the characteristic signal, a preset action is executed and the low-voltage battery is put into standby mode; wherein, the action includes: shutting down a preset target function module with low-voltage power demand.

[0179] Optionally, when executed by a computer processor, the computer-executable instructions can also be used to execute the technical solutions of any of the battery management methods for automobiles provided in the embodiments of this disclosure, thereby achieving the corresponding beneficial effects.

[0180] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the embodiments of this disclosure can be implemented using software and necessary general-purpose hardware, and of course, they can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solutions of the embodiments of this disclosure, in essence, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of this disclosure.

[0181] This disclosure also provides an electronic device, including: one or more processors; a memory for storing one or more programs or instructions; the processors execute the steps of any of the above methods by calling the programs or instructions stored in the memory, thereby achieving the corresponding beneficial effects.

[0182] Figure 7This is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of this disclosure. For example... Figure 7 As shown, the electronic device includes one or more processors 701 and memory 702.

[0183] The processor 701 may be a central processing unit (CPU) or other form of processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0184] The memory 702 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 701 may execute the program instructions to implement the battery management method for a vehicle according to the embodiments of this disclosure described above, and / or other desired functions. Various contents such as input signals, signal components, and noise components may also be stored in the computer-readable storage medium.

[0185] In one example, the electronic device may also include an input device 703 and an output device 704, which are interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0186] In addition, the input device 703 may also include, for example, a keyboard, a mouse, etc.

[0187] The output device 704 can output various information to the outside, including determined distance information, direction information, etc. The output device 704 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0188] Of course, for the sake of simplicity, Figure 7 Only some of the components of the electronic device relevant to this disclosure are shown, omitting components such as buses, input / output interfaces, etc. In addition, the electronic device may include any other suitable components depending on the specific application.

[0189] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0190] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery management method for automobiles, characterized in that, The method includes: Check whether the current operating condition of the vehicle meets the preset conditions for entering standby; When the conditions for entering standby are met, a characteristic signal for entering standby mode is sent to the vehicle controller, so that the vehicle controller performs a preset action and puts the low-voltage battery into standby mode. The actions include: shutting down preset target function modules with low-voltage power demand.

2. The method according to claim 1, characterized in that, Before detecting whether the current operating condition of the vehicle meets the preset standby conditions, the method further includes: Determine whether the standby mode has been entered; If the vehicle does not enter the standby mode, the current operating condition of the vehicle is checked to see if it meets the preset standby conditions. If the vehicle has entered the standby mode, the system checks whether the current operating condition of the vehicle meets the preset conditions for exiting standby.

3. The method according to claim 2, characterized in that, After detecting whether the current operating condition of the vehicle meets the preset exit standby conditions, the method further includes: When the conditions for exiting standby are met, the low-voltage battery is controlled by the vehicle controller to exit the standby mode.

4. The method according to claim 1 or 2, characterized in that, The conditions for entering standby mode that are met include at least one of the following: The cell temperature of the low-voltage battery is detected and it is determined that the cell temperature is lower than a first temperature value; The system detects and determines the presence of a first diagnostic fault code indicating that the protection circuit module is disconnected, and detects and determines that the state of charge of the low-voltage battery is higher than a first preset value; wherein, the protection circuit module is used to perform charge and discharge protection on the low-voltage battery. Confirm that the user's command to enter standby mode has been received; The state of charge of the power battery is detected and it is determined that the state of charge of the power battery is lower than a second preset value; The detection revealed the presence of a second diagnostic fault code indicating a malfunction in the DC-DC converter.

5. The method according to claim 4, characterized in that, If a first diagnostic fault code indicating that the protection circuit module is disconnected is present, and the state of charge of the low-voltage battery is higher than a first preset value, the action further includes controlling the protection circuit module to close.

6. The method according to claim 2, characterized in that, The conditions for exiting standby mode that are met include at least one of the following: The cell temperature of the low-voltage battery is detected and it is determined that the cell temperature is higher than a second temperature value; The state of charge of the low-voltage battery is detected, and it is determined that the state of charge of the low-voltage battery is higher than a fifth preset value, or the state of charge of the low-voltage battery is determined to be lower than a third preset value. Confirm that the user's command to exit standby has been received; The state of charge of the power battery is detected and it is determined that the state of charge of the power battery is higher than a fourth preset value. The test determined that there was no second diagnostic fault code indicating a fault in the DC-DC converter.

7. The method according to claim 1, characterized in that, The detection of whether the current operating condition of the vehicle meets the preset standby conditions includes: After the low-voltage power management system wakes up at preset time intervals, it checks whether the current operating condition of the vehicle meets the preset standby conditions.

8. A battery management method for automobiles, characterized in that, The method includes: Receive a characteristic signal from the low-voltage power management system indicating entry into standby mode; wherein, the characteristic signal is generated by the low-voltage power management system when it detects that the current operating condition of the vehicle meets the preset entry into standby conditions; Based on the characteristic signal, a preset action is executed and the low-voltage battery is put into standby mode; wherein, the action includes: shutting down a preset target functional module with low-voltage power demand.

9. The method according to claim 8, characterized in that, The receipt of the characteristic signal for entering standby mode from the low-voltage power management system includes: After being woken up by an NM message sent by the low-voltage power management system, it receives a characteristic signal from the low-voltage power management system indicating that it has entered standby mode.

10. The method according to claim 8, characterized in that, When the state of charge of the low-voltage battery is lower than a third preset value, the method further includes: The wireless communication module is activated to send a rescue signal to a preset terminal via the wireless communication module.

11. A battery management device for automobiles, characterized in that, The device includes: The condition detection module is used to detect whether the current operating condition of the vehicle meets the preset conditions for entering standby mode. The signal transmitting module is used to send a characteristic signal of entering standby mode to the vehicle controller when the standby conditions are met, so that the vehicle controller performs a preset action and puts the low-voltage battery into standby mode. The actions include: shutting down preset target function modules with low-voltage power demand.

12. A battery management device for automobiles, characterized in that, The device includes: The signal receiving module is used to receive a characteristic signal of entering standby mode from the low-voltage power management system; wherein, the characteristic signal is generated by the low-voltage power management system when it detects that the current operating condition of the vehicle meets the preset standby conditions; The mode entry module is used to perform a preset action based on the feature signal and put the low-voltage battery into standby mode; wherein, the action includes: shutting down a preset target function module with low-voltage power demand.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a program or instructions that cause a computer to perform the steps of the method as claimed in any one of claims 1 to 7, or to perform the steps of the method as claimed in any one of claims 8 to 10.

14. An electronic device, characterized in that, include: One or more processors; Memory, used to store one or more programs or instructions; The processor executes the steps of the method as described in any one of claims 1 to 7, or the steps of the method as described in any one of claims 8 to 10, by invoking a program or instruction stored in the memory.

15. A vehicle, characterized in that, include: The apparatus as claimed in claim 11, and / or the apparatus as claimed in claim 12.

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