Method and apparatus for managing low-voltage battery

Abstract

The present disclosure belongs to the technical field of vehicles. Provided are a method and apparatus for managing a low-voltage battery. The method comprises: on the basis of the remaining electric quantity of a low-voltage battery and a plurality of preset electric quantity ranges, determining a target preset electric quantity range; on the basis of a correspondence between the preset electric quantity ranges and function control strategies of low-voltage load devices, determining a target function control strategy for each low-voltage load device corresponding to the target preset electric quantity range, wherein the function control strategy for the low-voltage load device is used for indicating whether each function of the low-voltage load device can be enabled, and the lower the preset electric quantity range, the lower the power supply electric quantity required by a function that can be enabled in the function control strategy for the low-voltage load device corresponding to the preset electric quantity range; and on the basis of the target function control strategy for each low-voltage load device, controlling a function in a target low-voltage load device in a started state in a vehicle to be enabled or disabled, and controlling the low-voltage battery to supply power to the target low-voltage load device. By using the present disclosure, the power consumption of the whole vehicle is reduced.

Description

Management methods and devices for low-voltage batteries

[0001] This disclosure claims priority to Chinese Patent Application No. 202510278563.5, filed on March 10, 2025, entitled “Management Method and Apparatus for Low-Voltage Batteries”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of vehicles, and in particular to a method and apparatus for managing low-voltage batteries. Background Technology

[0003] With the advent of the "new four modernizations" of vehicles—intelligence, connectivity, electrification, and sharing—more and more functions are being added to vehicles to enhance the user experience, such as connectivity features. Many of the load devices that enable these functions require low-voltage batteries for power.

[0004] During vehicle use, the low-voltage battery continuously supplies power to these load devices regardless of whether the vehicle is powered on or off, but this method results in high power consumption for the entire vehicle. Summary of the Invention

[0005] This disclosure provides a low-voltage battery management method that can reduce overall vehicle power consumption. The technical solution is as follows:

[0006] In a first aspect, a method for managing a low-voltage battery is provided, the method comprising:

[0007] The remaining charge of the vehicle's low-voltage battery is periodically obtained;

[0008] Based on the remaining power of the low-voltage battery and multiple preset power ranges, determine the target preset power range to which the remaining power of the low-voltage battery belongs;

[0009] Based on the correspondence between the preset power range and the functional control strategies of each low-voltage load device, the target functional control strategy of each low-voltage load device corresponding to the target preset power range is determined. The functional control strategy of the low-voltage load device is used to indicate whether each function of the low-voltage load device can be turned on. The lower the preset power range, the lower the power required for the function that can be turned on in the functional control strategy of the low-voltage load device corresponding to the preset power range.

[0010] Based on the target function control strategy of each low-voltage load device, the function of the target low-voltage load device in the vehicle in the starting state is controlled to be turned on or off, and the low-voltage battery is controlled to supply power to the target low-voltage load device.

[0011] In one possible implementation, the preset power range includes a first power range and a second power range, wherein the lower limit of the second power range is equal to the upper limit of the first power range;

[0012] The functional control strategy for the target low-voltage load device corresponding to the first power range is the first control strategy, and the functional control strategy for the target low-voltage load device corresponding to the second power range is the second control strategy. In the first control strategy, the functions that the target low-voltage load device can activate include the first operating level of the target low-voltage load device. In the second control strategy, the functions that the target load device can activate include the first operating level and the second operating level of the target low-voltage load device. The power supply required for the second operating level is greater than or equal to the power supply required for the first operating level.

[0013] In one possible implementation, the step of controlling the function of the target low-voltage load device in the vehicle that is in the starting state to be turned on or off based on the target function control strategy of each low-voltage load device, and controlling the low-voltage battery to supply power to the target low-voltage load device, includes:

[0014] When the target preset power range determined in the current cycle and the target preset power range determined in the previous cycle are both the second power range, the first operating level of the target low-voltage load device is controlled to be turned off and the second operating level is started, and the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

[0015] When the target preset power range determined in the current cycle is the first power range and the target preset power range determined in the previous cycle is the second power range, the second operating level of the target low-voltage load device is controlled to be turned off and the first operating level is started, and the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the first operating level.

[0016] When the target preset power range determined in the current cycle and the target preset power range determined in the previous cycle are both the first power range, the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device continues to operate at the first operating level.

[0017] In one possible implementation, the step of controlling the function of the target low-voltage load device in the vehicle that is in the starting state to be turned on or off based on the target function control strategy of each low-voltage load device, and controlling the low-voltage battery to supply power to the target low-voltage load device, includes:

[0018] When the target preset power range determined in the current cycle is the second power range and the target preset power range determined in the previous cycle is the first power range, based on the remaining power of the voltage battery obtained in the current cycle, the functions in the target low-voltage load device are controlled to be turned on or off, and the low-voltage battery is controlled to supply power to the target low-voltage load device.

[0019] In one possible implementation, controlling the function of the target low-voltage load device to be turned on or off based on the remaining power of the voltage battery obtained in the current cycle, and controlling the low-voltage battery to supply power to the target low-voltage load device, includes:

[0020] When the remaining power obtained in the current cycle is less than or equal to the sum of the lower limit of the second power range and the preset hysteresis width, the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device continues to operate at the first operating level, wherein the preset hysteresis width is a positive value;

[0021] When the remaining power obtained in the current cycle is greater than the sum of the lower limit of the second power range and the preset hysteresis width, the first operating level of the target low-voltage load device is controlled to be turned off and the second operating level is started, and the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

[0022] In one possible implementation, the method further includes:

[0023] When the remaining charge of the low-voltage battery is less than a preset charge threshold, the high-voltage battery and DC-DC converter of the vehicle are controlled to charge the low-voltage battery.

[0024] In one possible implementation, the method further includes:

[0025] When charging the low-voltage battery, the temperature of the low-voltage battery is acquired, and based on the remaining charge and temperature of the low-voltage battery, a target charging voltage for the low-voltage battery is determined. Based on the target charging voltage, the high-voltage battery and the DC-DC converter are controlled to charge the low-voltage battery.

[0026] In one possible implementation, the method further includes:

[0027] If the control duration for charging the low-voltage battery by the high-voltage battery and the DC-DC converter based on the target charging voltage reaches a preset duration, and the charging voltage provided by the DC-DC converter to the low-voltage battery does not reach the target charging voltage, then the DC-DC converter is controlled to charge the low-voltage battery with a preset fault backup voltage.

[0028] In one possible implementation, the method further includes:

[0029] When the vehicle is in static parking mode, obtain the parking duration of the vehicle in static parking mode;

[0030] When the parking time exceeds the preset parking time, the low-voltage battery is controlled to stop supplying power to some of the target low-voltage load devices among the multiple target low-voltage load devices.

[0031] Secondly, a low-voltage battery management device is provided, the device comprising:

[0032] An acquisition module is used to periodically acquire the remaining power of the vehicle's low-voltage battery;

[0033] The first determining module is used to determine the target preset power range to which the remaining power of the low-voltage battery belongs based on the remaining power of the low-voltage battery and multiple preset power ranges;

[0034] The second determining module is used to determine the target function control strategy of each low-voltage load device corresponding to the target preset power range based on the correspondence between the preset power range and the function control strategy of each low-voltage load device. The function control strategy of the low-voltage load device is used to indicate whether each function of the low-voltage load device can be turned on. The lower the preset power range, the lower the power required for the function that can be turned on in the function control strategy of the low-voltage load device corresponding to the preset power range.

[0035] The control module is used to control the functions of the target low-voltage load devices in the vehicle that are in the starting state to be turned on or off based on the target function control strategy of each low-voltage load device, and to control the low-voltage battery to supply power to the target low-voltage load devices.

[0036] In one possible implementation, the preset power range includes a first power range and a second power range, wherein the lower limit of the second power range is equal to the upper limit of the first power range;

[0037] The functional control strategy for the target low-voltage load device corresponding to the first power range is the first control strategy, and the functional control strategy for the target low-voltage load device corresponding to the second power range is the second control strategy. In the first control strategy, the functions that the target low-voltage load device can activate include the first operating level of the target low-voltage load device. In the second control strategy, the functions that the target load device can activate include the first operating level and the second operating level of the target low-voltage load device. The power supply required for the second operating level is greater than or equal to the power supply required for the first operating level.

[0038] In one possible implementation, the control module is configured to:

[0039] When the target preset power range determined in the current cycle and the target preset power range determined in the previous cycle are both the second power range, the first operating level of the target low-voltage load device is controlled to be turned off and the second operating level is started, and the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

[0040] When the target preset power range determined in the current cycle is the first power range and the target preset power range determined in the previous cycle is the second power range, the second operating level of the target low-voltage load device is controlled to be turned off and the first operating level is started, and the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the first operating level.

[0041] When the target preset power range determined in the current cycle and the target preset power range determined in the previous cycle are both the first power range, the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device continues to operate at the first operating level.

[0042] In one possible implementation, the control module is configured to:

[0043] When the target preset power range determined in the current cycle is the second power range and the target preset power range determined in the previous cycle is the first power range, based on the remaining power of the voltage battery obtained in the current cycle, the functions in the target low-voltage load device are controlled to be turned on or off, and the low-voltage battery is controlled to supply power to the target low-voltage load device.

[0044] In one possible implementation, the control module is configured to:

[0045] When the remaining power obtained in the current cycle is less than or equal to the sum of the lower limit of the second power range and the preset hysteresis width, the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device continues to operate at the first operating level, wherein the preset hysteresis width is a positive value;

[0046] When the remaining power obtained in the current cycle is greater than the sum of the lower limit of the second power range and the preset hysteresis width, the first operating level of the target low-voltage load device is controlled to be turned off and the second operating level is started, and the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

[0047] In one possible implementation, the control module is further configured to:

[0048] When the remaining charge of the low-voltage battery is less than a preset charge threshold, the high-voltage battery and DC-DC converter of the vehicle are controlled to charge the low-voltage battery.

[0049] In one possible implementation, the control module is further configured to:

[0050] When charging the low-voltage battery, the temperature of the low-voltage battery is acquired, and based on the remaining charge and temperature of the low-voltage battery, a target charging voltage for the low-voltage battery is determined. Based on the target charging voltage, the high-voltage battery and the DC-DC converter are controlled to charge the low-voltage battery.

[0051] In one possible implementation, the control module is further configured to:

[0052] If the control duration for charging the low-voltage battery by the high-voltage battery and the DC-DC converter based on the target charging voltage reaches a preset duration, and the charging voltage provided by the DC-DC converter to the low-voltage battery does not reach the target charging voltage, then the DC-DC converter is controlled to charge the low-voltage battery with a preset fault backup voltage.

[0053] In one possible implementation, the control module is further configured to:

[0054] When the vehicle is in static parking mode, obtain the parking duration of the vehicle in static parking mode;

[0055] When the parking time exceeds the preset parking time, the low-voltage battery is controlled to stop supplying power to some of the target low-voltage load devices among the multiple target low-voltage load devices.

[0056] The beneficial effects of the technical solution provided in this disclosure are as follows: The solution mentioned in this disclosure will match the appropriate target function control strategy in each target low-voltage load device based on the remaining power of the low-voltage battery. When the remaining power of the low-voltage battery is low, it will control each function in each target low-voltage load device to be turned on or off in a reasonable manner so that the power required by the target low-voltage load device is reduced accordingly, thereby reducing the power loss of the low-voltage battery and thus reducing the power consumption of the whole vehicle. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 is a flowchart illustrating a low-voltage battery management method provided in an embodiment of this disclosure;

[0059] Figure 2 is a flowchart illustrating a low-voltage battery management method provided in an embodiment of this disclosure;

[0060] Figure 3 is a flowchart illustrating a low-voltage battery management method provided in an embodiment of this disclosure;

[0061] Figure 4 is a flowchart illustrating a low-voltage battery management method provided in an embodiment of this disclosure;

[0062] Figure 5 is a schematic diagram of the structure of a low-voltage battery management device provided in an embodiment of this disclosure. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0064] Figures 1 and 2 are flowcharts of a low-voltage battery management method provided in an embodiment of this disclosure. Referring to Figures 1 and 2, this embodiment includes:

[0065] 101. Periodically obtain the remaining power of the vehicle's low-voltage battery.

[0066] In practice, a low-voltage battery sensor can be installed on the vehicle. The low-voltage battery sensor is electrically connected to the low-voltage battery on the vehicle. The low-voltage battery sensor periodically acquires various state parameters of the low-voltage battery. These state parameters may include the remaining charge of the low-voltage battery, which can be any value between 0% and 100%.

[0067] The status parameters acquired by the low-voltage battery sensor may also include the current range that the low-voltage battery can currently supply, the current supply current, and other status parameters of the low-voltage battery.

[0068] Each time the low-voltage battery sensor acquires the status parameters of the low-voltage battery, it can send these parameters to the vehicle's controller.

[0069] The controller can be any device on the vehicle capable of implementing the control steps mentioned in the embodiments of this disclosure, such as a Zone Control Unit (ZCU), etc., and the embodiments of this disclosure do not limit it.

[0070] 102. Based on the remaining power of the low-voltage battery and multiple preset power ranges, determine the target preset power range to which the remaining power of the low-voltage battery belongs.

[0071] In practice, the controller can store multiple preset power ranges in advance. When the controller receives the remaining power of the low-voltage battery from the low-voltage battery sensor, it can determine the preset power range to which the remaining power of the low-voltage battery belongs, and set the preset power range to which the remaining power of the low-voltage battery belongs as the target preset power range.

[0072] In one possible implementation, the method for setting multiple preset power ranges pre-stored in the controller can be: dividing 100% of the remaining power into multiple intervals according to the preset range width, thereby obtaining multiple preset power ranges.

[0073] For example, when the preset range width is 20%, the resulting preset battery ranges are 0%-20%, 20%-40%, 40%-60%, 60%-80%, and 80%-100%.

[0074] In another possible implementation, the method for setting multiple preset power ranges pre-stored in the controller can be: based on multiple preset power values, divide the 100% remaining power into multiple intervals to obtain multiple preset power ranges.

[0075] For example, when multiple preset battery values ​​are 35%, 45%, and 49%, the resulting preset battery ranges are 0%-35%, 35%-45%, 45%-49%, and 49%-100%.

[0076] 103. Based on the correspondence between the preset power range and the functional control strategies of each low-voltage load device, determine the target functional control strategy of each low-voltage load device corresponding to the target preset power range.

[0077] In practice, the low-voltage battery can power multiple low-voltage load devices to enable the various functions of the low-voltage load devices. The low-voltage load devices are the devices in the vehicle that require power from the low-voltage battery, such as air conditioners, audio systems, displays, etc.

[0078] Each low-pressure load device can have one or more functions. For example, the functions of an air conditioner may include cooling level 1, cooling level 2, cooling level 3, heating level 1, heating level 2, heating level 3, dehumidification function, etc. Among them, the cooling effect of cooling level 1, cooling level 2, and cooling level 3 increases in sequence, and the heating effect of heating level 1, heating level 2, and heating level 3 increases in sequence.

[0079] In this embodiment of the disclosure, the function control strategy of the low-voltage load device is used to indicate whether each function of the low-voltage load device can be turned on. The lower the preset power range, the lower the power required for the function that can be turned on in the function control strategy of the low-voltage load device corresponding to the preset power range.

[0080] Each low-voltage load device corresponds to multiple function control strategies. For the same low-voltage load device, different function control strategies may have different settings regarding whether multiple functions of the low-voltage load device can be enabled.

[0081] For a relatively low preset battery level range, the functions that can be activated within the corresponding low-voltage load device's control strategy require less power from the low-voltage battery. Conversely, for a relatively high preset battery level range, the functions that can be activated within the corresponding low-voltage load device's control strategy require more power from the low-voltage battery.

[0082] For example, the target low-voltage load device is an air conditioner. When the preset power range is 35%-45%, in the air conditioner's functional control strategy corresponding to this preset power range, cooling level 1, heating level 1, and dehumidification functions are operable, while cooling level 2, cooling level 3, heating level 2, and heating level 3 functions are not operable. When the preset power range is 45%-49%, in the air conditioner's functional control strategy corresponding to this preset power range, cooling level 1, cooling level 2, heating level 1, heating level 2, and dehumidification functions are operable, while cooling level 3 and heating level 3 functions are not operable. When the preset power range is 49%-100%, in the air conditioner's functional control strategy corresponding to this preset power range, all functions of the air conditioner are operable.

[0083] In this embodiment of the disclosure, the setting of multiple function control strategies for low-voltage load devices can be based on the power supply required for each function to be implemented, and power limits can be imposed on different function control strategies. Of course, the function control strategies can also be set based on other conditions, and this embodiment of the disclosure does not limit this.

[0084] It is understandable that for some low-voltage load devices, when there are a relatively large number of preset power ranges and the low-voltage load devices have few functions, the function control strategies corresponding to two or more adjacent preset power ranges may be the same. However, the power required for the function to be enabled in the function control strategy corresponding to the preset power range with a smaller value will not be greater than the power required for the function to be enabled in the function control strategy corresponding to the preset power range with a larger value.

[0085] 104. Based on the target function control strategy of each low-voltage load device, control the function of the target low-voltage load device in the vehicle in the starting state to turn on or off, and control the low-voltage battery to supply power to the target low-voltage load device.

[0086] Among them, the target low-voltage load device is the low-voltage load device that is in the start-up state among multiple low-voltage load devices.

[0087] In practice, once the target function control strategy for each low-voltage load device is determined based on the remaining power of the low-voltage battery obtained in the current cycle, when the low-voltage battery supplies power to each target low-voltage load device in the start-up state, the various functions of the target low-voltage load device can be restricted based on the target function control strategy, thereby reducing the power supplied by the low-voltage battery and thus reducing the overall vehicle power consumption.

[0088] In one possible implementation, the preset power range setting and the corresponding function control strategy setting can be as follows:

[0089] The preset battery range includes a first battery range and a second battery range, with the lower limit of the second battery range equal to the upper limit of the first battery range. For example, when multiple preset battery ranges are 0%-35%, 35%-45%, 45%-49%, and 49%-100%, the first battery range and the second battery range can be 0%-35% and 35%-45%, respectively; or, the first battery range and the second battery range can be 35%-45% and 45%-49%, respectively; or, the first battery range and the second battery range can be 45%-49% and 49%-100%, respectively.

[0090] The functional control strategy for the target low-voltage load device corresponding to the first power range is the first control strategy, and the functional control strategy for the target low-voltage load device corresponding to the second power range is the second control strategy. In the first control strategy, the functions that the target low-voltage load device can activate include the first operating level of the target low-voltage load device. In the second control strategy, the functions that the target load device can activate include the first operating level and the second operating level of the target low-voltage load device. The power supply required for the second operating level is greater than or equal to the power supply required for the first operating level.

[0091] For example, if the target low-voltage load device is an air conditioner, the functions that can be activated in the first control strategy corresponding to the air conditioner include cooling level one, and the functions that can be activated in the second control strategy corresponding to the air conditioner include cooling level two. The cooling effect of cooling level two is stronger than that of cooling level one, and correspondingly, the power supply required for cooling level two is also greater than that for cooling level one.

[0092] In this situation, the power supply of the low-voltage battery to the target low-voltage load device can be controlled according to the target function control strategy. In this way, the function of the target low-voltage load device can be limited according to the remaining power of the low-voltage battery, thereby achieving the purpose of reducing the power consumption of the low-voltage battery and reducing the power consumption of the whole vehicle.

[0093] In one possible implementation, given the preset power range and corresponding function control strategy set by the above method, the controller's control method can be:

[0094] When the target preset power range determined in the current cycle and the target preset power range determined in the previous cycle are both the second power range, the first operating level of the target low-voltage load device is turned off and the second operating level is turned on, and the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

[0095] When the target preset power range determined in the current cycle is the first power range and the target preset power range determined in the previous cycle is the second power range, the second operating level of the target low-voltage load device is turned off and the first operating level is started. The low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the first operating level.

[0096] When the target preset power range determined in the current cycle and the target preset power range determined in the previous cycle are both the first power range, the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device continues to operate at the first operating level.

[0097] In practice, when the low-voltage battery is not charging, its remaining charge will gradually decrease as it supplies power to various target low-voltage load devices.

[0098] If the target preset power range determined in the current cycle is the second power range, then we can check whether the target preset power range determined in the previous cycle is the second power range. If so, it means that the target preset power range determined in two consecutive cycles is the second power range. This indicates that even though the remaining power of the low-voltage battery is constantly changing, the remaining power in the current cycle is still very stable within the second power range. At this time, the second control strategy corresponding to the second power range can be determined as the target function control strategy. The functions that can be enabled in the second control strategy include the first operating level and the second operating level. This means that the highest level that the target low-voltage load device can start at this time is the second operating level. Therefore, to improve the user experience, we can control the first operating level of the target low-voltage load device to be turned off and control the second operating level to be started, controlling the low-voltage battery to supply power to the target low-voltage load device to achieve the second operating level startup of the target low-voltage load device.

[0099] Similarly, if the target preset power range determined in the current cycle is the first power range, then we can check whether the target preset power range determined in the previous cycle is the first power range. If so, it means that the target preset power range determined in two consecutive cycles is the first power range. This means that even though the remaining power of the low-voltage battery is constantly changing, the remaining power in the current cycle is still very stable within the first power range. At this time, the first control strategy corresponding to the first power can be determined as the target function control strategy. The functions that can be enabled in the first control strategy include the first operating level, which means that the highest level that the target low-voltage load device can start at this time is the first operating level. Therefore, the controller can control the second operating level of the target low-voltage load device to be in the off state and control the first operating level to be started, and control the low-voltage battery to supply power to the target low-voltage load device to realize the first operating level start of the target low-voltage load device.

[0100] If the target preset power range determined in the current cycle is the first power range, but the target preset power range determined in the previous cycle is the second power range, it means that during the period from the previous cycle to the current cycle, the remaining power of the low-voltage battery has decreased from the second power range to the first power range. As can be seen from the above, in the previous cycle, the target low-voltage load device was usually in the second operating level. In the current cycle, since the remaining power of the low-voltage battery has decreased to the first power range, the second operating level of the target low-voltage load device can be controlled to be turned off, and the first operating level of the target low-voltage load device can be controlled to be started. At the same time, the low-voltage battery can be controlled to supply power for the target low-voltage load device to start the first operating level.

[0101] In this way, the functions of various devices in the target low-voltage load can be restricted and adjusted according to the target preset power range to which the remaining power belongs. As the remaining power of the low-voltage battery decreases, the power required by the target low-voltage load device is also reduced, thereby achieving the goal of low power consumption of the whole vehicle.

[0102] In one possible implementation, when the target preset power range determined in the current cycle is the second power range and the target preset power range determined in the previous cycle is the first power range, the function in the target low-voltage load device is controlled to be turned on or off based on the remaining power of the voltage battery obtained in the current cycle, and the low-voltage battery is controlled to supply power to the target low-voltage load device.

[0103] In practice, if the target preset power range determined in the current cycle is the second power range, but the target preset power range determined in the previous cycle is the first power range, it means that during the period from the previous cycle to the current cycle, the low-voltage battery may be in a charging state, so that the remaining power of the low-voltage battery increases from the first power range to the second power range. At this time, the remaining power of the low-voltage battery in the current cycle can be obtained, and then the controller can control the function in the target low-voltage load device to be turned on or off based on the remaining power, and control the low-voltage battery to supply power to the target low-voltage load device.

[0104] When the remaining power of the low-voltage battery increases from the first power range to the second power range, the controller can control the following: when the target preset power range determined in the current cycle is the second power range and the target preset power range determined in the previous cycle is the first power range, the controller controls the first operating level of the target low-voltage load device to be turned off and the second operating level to be started, and controls the low-voltage battery to supply power to the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

[0105] In practice, during the previous cycle, the target low-voltage load device is usually in the first operating level. In the current cycle, since the remaining power of the low-voltage battery has increased to the second power range, the second control strategy can be implemented. That is, the first operating level of the target low-voltage load device can be turned off, and the second operating level of the target low-voltage load device can be started. At the same time, the low-voltage battery is controlled to supply power for the target low-voltage load device to start the second operating level.

[0106] In this way, the functions of the target low-voltage load device can be restricted and adjusted according to the target preset power range to which the remaining power belongs. As the remaining power of the low-voltage battery increases, its ability to supply power to the target low-voltage load device also increases. At this time, the target low-voltage load device is controlled to be upgraded from the first operating level to the second operating level, which improves the user experience while ensuring low power consumption of the whole vehicle.

[0107] Alternatively, for the case where the remaining charge of the low-voltage battery increases from the first charge range to the second charge range, the controller's control method can also be:

[0108] When the remaining power obtained in the current cycle is less than or equal to the sum of the lower limit of the second power range and the preset hysteresis width, the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device continues to operate at the first operating level, wherein the preset hysteresis width is a positive value.

[0109] When the remaining power obtained in the current cycle is greater than the sum of the lower limit of the second power range and the preset hysteresis width, the first operating level of the target low-voltage load device is turned off and the second operating level is started. The low-voltage battery is also controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

[0110] In practice, the remaining power of the low-voltage battery determined in the previous cycle belongs to the first power range, and the remaining power of the low-voltage battery determined in the current cycle belongs to the second power range. In order to determine whether the remaining power of the low-voltage battery in the current cycle has indeed increased to the second power range, the sum of the lower limit of the second power range and the preset hysteresis width can be calculated first, and then it can be determined whether the remaining power of the low-voltage battery obtained in the current cycle is greater than the sum of the lower limit of the second power range and the preset hysteresis width.

[0111] If the value is not greater than (i.e. less than or equal to), it means that the remaining voltage value of the low-voltage battery obtained in the current cycle may be a simple numerical fluctuation, and may not mean that the remaining power of the low-voltage battery has increased to the second power range. It is possible that the remaining power of the low-voltage battery obtained in the next cycle will jump back to the first power range. Therefore, at this time, the controller's control strategy is not adjusted. That is, the controller still controls the target low-voltage load device to operate at the first operating level and controls the low-voltage battery to supply power to the target low-voltage load device to achieve the first operating level.

[0112] If it is greater than the second power range, it means that the remaining power of the low-voltage battery obtained in the current cycle has indeed increased to the second power range. At this time, the controller can control the implementation of the second control strategy corresponding to the second power range, that is, control the first operating level of the target low-voltage load device to be turned off and the second operating level to be started, and control the low-voltage battery to supply power to the target low-voltage load device so that the target low-voltage load device can operate at the second operating level.

[0113] This allows for a more accurate determination of the remaining variables of the low-voltage battery, and enables more stable and accurate adjustments to the functions of the target low-voltage load equipment based on these changes. This achieves low power consumption for the entire vehicle while improving the user experience.

[0114] In one possible implementation, referring to Figure 3, the low-voltage battery management method provided in this disclosure embodiment may further include the following processing method:

[0115] When the remaining charge of the low-voltage battery is less than a preset charge threshold, the high-voltage battery and DC-DC converter of the vehicle are controlled to charge the low-voltage battery.

[0116] In practice, the controller can store a preset power threshold. The low-voltage battery sensor sends the detected remaining power of the low-voltage battery to the controller, and the controller compares the received remaining power of the low-voltage battery with the preset power threshold.

[0117] If the remaining power of the low-voltage battery is greater than or equal to the preset power threshold, it means that the remaining power of the low-voltage battery is sufficient to power the various low-voltage load devices. Therefore, there is no need to charge the low-voltage battery at this time.

[0118] If the remaining power of the low-voltage battery is less than the preset power threshold, it means that the remaining power of the low-voltage battery is low and needs to be charged in time to meet the power supply needs of each low-voltage load device. Therefore, the controller can control the high-voltage battery and DC-DC converter in the vehicle to charge the low-voltage battery.

[0119] The DC-DC converter is electrically connected to the high-voltage battery and the low-voltage battery respectively. During the charging process of the low-voltage battery, the high-voltage battery supplies DC power to the DC-DC converter. The DC-DC converter steps down the received DC power and then supplies the stepped-down DC power to the low-voltage battery, thereby charging the low-voltage battery.

[0120] In this way, by monitoring the status of the low-voltage battery in real time, the low-voltage battery can be charged in a timely manner. This charging method is applicable to any scenario of the vehicle (such as the vehicle network in sleep mode or the vehicle network in non-sleep mode), ensuring that the battery does not run out of power in any scenario during vehicle use. This improves the safety and reliability of the low-voltage battery power supply system, thereby enhancing the user experience.

[0121] In this embodiment of the disclosure, the following processing can also be performed when charging the low-voltage battery:

[0122] When charging the low-voltage battery, the temperature of the low-voltage battery is acquired. Based on the remaining charge and temperature of the low-voltage battery, the target charging voltage of the low-voltage battery is determined. Based on the target charging voltage, the high-voltage battery and the DC-DC converter are controlled to charge the low-voltage battery.

[0123] In implementation, the controller can store a pre-set charging control table, which sets the correspondence between multiple remaining power ranges, multiple temperature ranges, and multiple target charging voltages. Each remaining power range corresponds to all temperature ranges, and each temperature range also corresponds to a charging voltage.

[0124] When charging a low-voltage battery, the remaining capacity and temperature of the low-voltage battery are obtained. Then, among the multiple remaining capacity ranges in the charging control table, the target remaining capacity range to which the low-voltage battery belongs is checked. Then, among the multiple temperature ranges corresponding to the target remaining capacity range in the charging control table, the target temperature range to which the low-voltage battery belongs is checked. Finally, the charging voltage corresponding to the target temperature range corresponding to the target remaining capacity range is checked in the charging control table. This charging voltage is the target charging voltage.

[0125] The controller can control the DC-DC converter to charge the low-voltage battery with the target charging voltage as the output voltage value.

[0126] In this way, the charging voltage of the low-voltage battery can be adjusted in real time according to the change in the remaining charge of the low-voltage battery during the charging process, thereby reducing the power consumption of the entire vehicle while fully charging the low-voltage battery.

[0127] It is understood that the various correspondences in the charging control table mentioned above can be set based on the actual situation, the actual charging needs of the low-voltage battery, and the purpose of reducing the power consumption of the whole vehicle. They can also be set based on various experimental results. The specific values ​​in this embodiment are not limited.

[0128] In this embodiment of the disclosure, the following processing can also be performed when charging the low-voltage battery:

[0129] If the control time for charging the low-voltage battery by the high-voltage battery and the DC-DC converter based on the target charging voltage reaches the preset time, and the charging voltage provided by the DC-DC converter to the low-voltage battery does not reach the target charging voltage, then the DC-DC converter is controlled to charge the low-voltage battery with a preset fault backup voltage.

[0130] During implementation, when charging the low-voltage battery, the controller periodically determines the target charging voltage to provide a suitable charging voltage to the low-voltage battery at all times. If the charging voltage provided by the DC-DC converter to the low-voltage battery does not reach the target charging voltage after a preset time has elapsed since the controller sent the target charging voltage to the DC-DC converter, then there may be a fault such as internal hardware failure of the DC-DC converter, loss of commands sent by the controller, or loss of information sent by the low-voltage battery sensor. This would prevent the DC-DC converter from charging the low-voltage battery according to the preset method. In this case, the controller can control the DC-DC converter to charge the low-voltage battery with a preset backup voltage.

[0131] This preset backup voltage ensures that the low-voltage battery will not run out of power, thereby improving the safety and reliability of the low-voltage battery power supply system and enhancing the user experience.

[0132] The preset backup voltage can be set according to the parameters of the low-voltage battery and the power supply requirements of each low-voltage load device. For example, it can be 13.8 volts, etc. This disclosure does not limit this.

[0133] In one possible implementation, referring to Figure 4, the low-voltage battery management method provided in this embodiment of the disclosure may further include the following processing method:

[0134] When the vehicle is in static parking mode, the parking duration of the vehicle in static parking mode is obtained; when the parking duration exceeds the preset parking duration, the low-voltage battery is controlled to stop supplying power to some of the target low-voltage load devices among multiple target low-voltage load devices.

[0135] The static parking mode can include static parking scenarios when the vehicle is powered off and static parking scenarios during the vehicle's power-on process.

[0136] In practice, the controller pre-stores multiple low-voltage load devices that do not affect vehicle operation.

[0137] If the vehicle's parking time exceeds the preset parking time, it indicates that the parking time is relatively long. In this case, the controller can determine the target low-voltage load device that will not affect the vehicle's operation from among the multiple target low-voltage load devices that are currently in the start-up state, based on a pre-stored list of low-voltage load devices that do not affect the vehicle's operation. Then, it controls the target low-voltage load device that does not affect the vehicle's operation to be turned off, meaning that the low-voltage battery no longer needs to supply power to it, thereby reducing the overall vehicle power consumption.

[0138] It is understood that the selection of the aforementioned low-voltage load equipment that does not affect vehicle operation can be based on the vehicle's service targets or the vehicle's own functions, or it can be set by the driver according to their own needs, etc. This disclosure does not limit this.

[0139] Furthermore, when the vehicle is in static parking mode, if the controller detects abnormal power consumption, it can shut down some target low-voltage load devices and send a deep sleep command, thereby reducing the overall power consumption of the vehicle.

[0140] Meanwhile, the T-Box (TelematicsBOX) can send abnormal power consumption information to the cloud, and through cloud data analysis, resolve abnormal power consumption issues and optimize the design.

[0141] All of the above-mentioned optional technical solutions can be combined in any way to form optional embodiments of this disclosure, and will not be described in detail here.

[0142] The scheme mentioned in this embodiment will match the appropriate target function control strategy in each target low-voltage load device based on the remaining power of the low-voltage battery. When the remaining power of the low-voltage battery is low, the functions in each target low-voltage load device will be reasonably turned on or off so that the power required by the target low-voltage load device is reduced accordingly, thereby reducing the power loss of the low-voltage battery and thus reducing the power consumption of the whole vehicle.

[0143] This disclosure provides a low-voltage battery management device, which can be the computer device described in the above embodiments. As shown in FIG5, the device includes:

[0144] The acquisition module 510 is used to periodically acquire the remaining power of the low-voltage battery of the vehicle;

[0145] The first determining module 520 is used to determine the target preset power range to which the remaining power of the low-voltage battery belongs based on the remaining power of the low-voltage battery and multiple preset power ranges.

[0146] The second determining module 530 is used to determine the target function control strategy of each low-voltage load device corresponding to the target preset power range based on the correspondence between the preset power range and the function control strategy of each low-voltage load device. The function control strategy of the low-voltage load device is used to indicate whether each function of the low-voltage load device can be turned on. The lower the preset power range, the lower the power required for the function that can be turned on in the function control strategy of the low-voltage load device corresponding to the preset power range.

[0147] The control module 540 is used to control the function of the target low-voltage load device in the vehicle that is in the starting state to be turned on or off based on the target function control strategy of each low-voltage load device, and to control the low-voltage battery to supply power to the target low-voltage load device.

[0148] In one possible implementation, the preset power range includes a first power range and a second power range, wherein the lower limit of the second power range is equal to the upper limit of the first power range;

[0149] The functional control strategy for the target low-voltage load device corresponding to the first power range is the first control strategy, and the functional control strategy for the target low-voltage load device corresponding to the second power range is the second control strategy. In the first control strategy, the functions that the target low-voltage load device can activate include the first operating level of the target low-voltage load device. In the second control strategy, the functions that the target load device can activate include the first operating level and the second operating level of the target low-voltage load device. The power supply required for the second operating level is greater than or equal to the power supply required for the first operating level.

[0150] In one possible implementation, the control module 540 is configured to:

[0151] When the target preset power range determined in the current cycle and the target preset power range determined in the previous cycle are both the second power range, the first operating level of the target low-voltage load device is controlled to be turned off and the second operating level is started, and the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

[0152] When the target preset power range determined in the current cycle is the first power range and the target preset power range determined in the previous cycle is the second power range, the second operating level of the target low-voltage load device is controlled to be turned off and the first operating level is started, and the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the first operating level.

[0153] When the target preset power range determined in the current cycle and the target preset power range determined in the previous cycle are both the first power range, the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device continues to operate at the first operating level.

[0154] In one possible implementation, the control module 540 is configured to:

[0155] When the target preset power range determined in the current cycle is the second power range and the target preset power range determined in the previous cycle is the first power range, based on the remaining power of the voltage battery obtained in the current cycle, the functions in the target low-voltage load device are controlled to be turned on or off, and the low-voltage battery is controlled to supply power to the target low-voltage load device.

[0156] In one possible implementation, the control module 540 is configured to:

[0157] When the remaining power obtained in the current cycle is less than or equal to the sum of the lower limit of the second power range and the preset hysteresis width, the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device continues to operate at the first operating level, wherein the preset hysteresis width is a positive value;

[0158] When the remaining power obtained in the current cycle is greater than the sum of the lower limit of the second power range and the preset hysteresis width, the first operating level of the target low-voltage load device is controlled to be turned off and the second operating level is started, and the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

[0159] In one possible implementation, the control module 540 is further configured to:

[0160] When the remaining charge of the low-voltage battery is less than a preset charge threshold, the high-voltage battery and DC-DC converter of the vehicle are controlled to charge the low-voltage battery.

[0161] In one possible implementation, the control module 540 is further configured to:

[0162] When charging the low-voltage battery, the temperature of the low-voltage battery is acquired, and based on the remaining charge and temperature of the low-voltage battery, a target charging voltage for the low-voltage battery is determined. Based on the target charging voltage, the high-voltage battery and the DC-DC converter are controlled to charge the low-voltage battery.

[0163] In one possible implementation, the control module 540 is further configured to:

[0164] If the control duration for charging the low-voltage battery by the high-voltage battery and the DC-DC converter based on the target charging voltage reaches a preset duration, and the charging voltage provided by the DC-DC converter to the low-voltage battery does not reach the target charging voltage, then the DC-DC converter is controlled to charge the low-voltage battery with a preset fault backup voltage.

[0165] In one possible implementation, the control module 540 is further configured to:

[0166] When the vehicle is in static parking mode, obtain the parking duration of the vehicle in static parking mode;

[0167] When the parking time exceeds the preset parking time, the low-voltage battery is controlled to stop supplying power to some of the target low-voltage load devices among the multiple target low-voltage load devices.

[0168] It should be noted that the low-voltage battery management device provided in the above embodiments is only illustrated by the division of the above functional modules when managing low-voltage batteries. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the low-voltage battery management device and the low-voltage battery management method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0169] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0170] It should be noted that all information (including but not limited to user equipment information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.), and signals (including but not limited to signals transmitted between user terminals and other devices) involved in this disclosure are authorized by the user or fully authorized by all parties, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, information such as "remaining charge of the low-voltage battery," "functional control strategy," and "temperature of the low-voltage battery" involved in this disclosure were obtained with full authorization.

[0171] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A method for managing a low-voltage battery, wherein, The method includes: The remaining charge of the vehicle's low-voltage battery is periodically obtained; Based on the remaining power of the low-voltage battery and multiple preset power ranges, determine the target preset power range to which the remaining power of the low-voltage battery belongs; Based on the correspondence between the preset power range and the functional control strategies of each low-voltage load device, the target functional control strategy of each low-voltage load device corresponding to the target preset power range is determined. The functional control strategy of the low-voltage load device is used to indicate whether each function of the low-voltage load device can be turned on. The lower the preset power range, the lower the power required for the function that can be turned on in the functional control strategy of the low-voltage load device corresponding to the preset power range. Based on the target function control strategy of each low-voltage load device, the function of the target low-voltage load device in the vehicle in the starting state is controlled to be turned on or off, and the low-voltage battery is controlled to supply power to the target low-voltage load device.

2. The method according to claim 1, wherein, The preset power range includes a first power range and a second power range, wherein the lower limit of the second power range is equal to the upper limit of the first power range; The functional control strategy for the target low-voltage load device corresponding to the first power range is the first control strategy, and the functional control strategy for the target low-voltage load device corresponding to the second power range is the second control strategy. In the first control strategy, the functions that the target low-voltage load device can activate include the first operating level of the target low-voltage load device. In the second control strategy, the functions that the target load device can activate include the first operating level and the second operating level of the target low-voltage load device. The power supply required for the second operating level is greater than or equal to the power supply required for the first operating level.

3. The method according to claim 2, wherein, The target function control strategy based on each low-voltage load device controls the functions of the target low-voltage load devices in the vehicle that are in the starting state to be turned on or off, and controls the low-voltage battery to supply power to the target low-voltage load devices, including: When the target preset power range determined in the current cycle and the target preset power range determined in the previous cycle are both the second power range, the first operating level of the target low-voltage load device is controlled to be turned off and the second operating level is started, and the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the second operating level. When the target preset power range determined in the current cycle is the first power range and the target preset power range determined in the previous cycle is the second power range, the second operating level of the target low-voltage load device is controlled to be turned off and the first operating level is started, and the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the first operating level. When the target preset power range determined in the current cycle and the target preset power range determined in the previous cycle are both the first power range, the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device continues to operate at the first operating level.

4. The method according to claim 3, wherein, The target function control strategy based on each low-voltage load device controls the functions of the target low-voltage load devices in the vehicle that are in the starting state to be turned on or off, and controls the low-voltage battery to supply power to the target low-voltage load devices, including: When the target preset power range determined in the current cycle is the second power range and the target preset power range determined in the previous cycle is the first power range, based on the remaining power of the voltage battery obtained in the current cycle, the functions in the target low-voltage load device are controlled to be turned on or off, and the low-voltage battery is controlled to supply power to the target low-voltage load device.

5. The method according to claim 4, wherein, The method of controlling the functions in the target low-voltage load device to be turned on or off based on the remaining power of the voltage battery obtained in the current cycle, and controlling the low-voltage battery to supply power to the target low-voltage load device, includes: When the remaining power obtained in the current cycle is less than or equal to the sum of the lower limit of the second power range and the preset hysteresis width, the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device continues to operate at the first operating level, wherein the preset hysteresis width is a positive value; When the remaining power obtained in the current cycle is greater than the sum of the lower limit of the second power range and the preset hysteresis width, the first operating level of the target low-voltage load device is controlled to be turned off and the second operating level is started, and the low-voltage battery is controlled to supply power to the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

6. The method according to claim 1, wherein, The method further includes: When the remaining charge of the low-voltage battery is less than a preset charge threshold, the high-voltage battery and DC-DC converter of the vehicle are controlled to charge the low-voltage battery.

7. The method according to claim 6, wherein, The method further includes: When charging the low-voltage battery, the temperature of the low-voltage battery is acquired, and based on the remaining charge and temperature of the low-voltage battery, a target charging voltage for the low-voltage battery is determined. Based on the target charging voltage, the high-voltage battery and the DC-DC converter are controlled to charge the low-voltage battery.

8. The method according to claim 7, wherein, The method further includes: If the control duration for charging the low-voltage battery by the high-voltage battery and the DC-DC converter based on the target charging voltage reaches a preset duration, and the charging voltage provided by the DC-DC converter to the low-voltage battery does not reach the target charging voltage, then the DC-DC converter is controlled to charge the low-voltage battery with a preset fault backup voltage.

9. The method according to claim 1, wherein, The method further includes: When the vehicle is in static parking mode, obtain the parking duration of the vehicle in static parking mode; When the parking time exceeds the preset parking time, the low-voltage battery is controlled to stop supplying power to some of the target low-voltage load devices among the multiple target low-voltage load devices.

10. A management device for a low-voltage battery, wherein, The device includes: An acquisition module is used to periodically acquire the remaining power of the vehicle's low-voltage battery; The first determining module is used to determine the target preset power range to which the remaining power of the low-voltage battery belongs based on the remaining power of the low-voltage battery and multiple preset power ranges; The second determining module is used to determine the target function control strategy of each low-voltage load device corresponding to the target preset power range based on the correspondence between the preset power range and the function control strategy of each low-voltage load device. The function control strategy of the low-voltage load device is used to indicate whether each function of the low-voltage load device can be turned on. The lower the preset power range, the lower the power required for the function that can be turned on in the function control strategy of the low-voltage load device corresponding to the preset power range. The control module is used to control the functions of the target low-voltage load devices in the vehicle that are in the starting state to be turned on or off based on the target function control strategy of each low-voltage load device, and to control the low-voltage battery to supply power to the target low-voltage load devices.

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