Method and device for managing low-voltage battery

Abstract

The invention provides a low-voltage battery management method and device, and belongs to the technical field of vehicles. The method comprises the following steps: determining a target preset electric quantity range based on the residual electric quantity of a low-voltage battery and a plurality of preset electric quantity ranges; based on a corresponding relation between a preset electric quantity range and a function control strategy of each low-voltage load device, determining a target function control strategy of each low-voltage load device corresponding to the target preset electric quantity range, the function control strategy of the low-voltage load device being used for indicating whether each function of the low-voltage load device can be started or not; the lower the preset electric quantity range is, the lower the power supply electric quantity required by the function capable of being started in the function control strategy of the low-voltage load equipment corresponding to the preset electric quantity range is; and based on the target function control strategy of each low-voltage load device, controlling functions in the target low-voltage load device in a starting state in the vehicle to be started or closed, and controlling a low-voltage battery to supply power to the target low-voltage load device. According to the invention, the power consumption of the whole vehicle is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to a management method and device for a low-voltage battery. Background Art

[0002] With the advent of the new four trends of vehicle intelligence, networking, electrification, and sharing, more and more functions are set up on vehicles to improve user experience, such as networking functions, etc. Among them, many load devices that realize this function require low-voltage batteries to power them.

[0003] During the use of the vehicle, no matter whether the vehicle is in the powered-on state or the powered-off state, the low-voltage battery continuously supplies power to these load devices, but this method results in higher power consumption of the entire vehicle. Summary of the invention

[0004] The embodiment of the present disclosure provides a low-voltage battery management method, which can reduce the power consumption of the entire vehicle. The technical solution is as follows:

[0005] In a first aspect, a low-voltage battery management method is provided, the method comprising:

[0006] Periodically obtaining the remaining power of the low-voltage battery of the vehicle;

[0007] Based on the remaining power of the low-voltage battery and a plurality of preset power ranges, determining a target preset power range to which the remaining power of the low-voltage battery belongs;

[0008] Based on the correspondence between the preset power range and the function control strategy of each low-voltage load device, determine the target function control strategy of each low-voltage load device corresponding to the target preset power range, wherein 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, and the lower the preset power range, the lower the power supply 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;

[0009] 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 that is in the startup 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.

[0010] In a possible implementation, the preset power range includes a first power range and a second power range, and a lower limit of the second power range is equal to an upper limit of the first power range;

[0011] The function control strategy of the target low-voltage load device corresponding to the first power range is the first control strategy, and the function control strategy of 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 can be turned on by the target low-voltage load device include the first operating level of the target low-voltage load device, and in the second control strategy, the functions that can be turned on by the target load device include the first operating level of the target low-voltage load device and the second operating level of the target low-voltage load device, and the power supply required for the second operating level is greater than the power supply required for the first operating level.

[0012] In a possible implementation, the target function control strategy based on each low-voltage load device controls the function of the target low-voltage load device in the vehicle that is in the startup state to be turned on or off, and controls the low-voltage battery to supply power to the target low-voltage load device, including:

[0013] 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 operation level of the target low-voltage load device is controlled to be turned off and the second operation level is activated, 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 operation level;

[0014] 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 operation level of the target low-voltage load device is controlled to be turned off and the first operation level is activated, 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 operation level;

[0015] 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 power the target low-voltage load device so that the target low-voltage load device continues to operate at the first operating level.

[0016] In a possible implementation, the target function control strategy based on each low-voltage load device controls the function of the target low-voltage load device in the vehicle that is in the startup state to be turned on or off, and controls the low-voltage battery to supply power to the target low-voltage load device, including:

[0017] 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 function of the target low-voltage load device is controlled to be turned on or off, and the low-voltage battery is controlled to power the target low-voltage load device.

[0018] In a possible implementation, based on the remaining power of the voltage battery acquired in the current cycle, controlling the function in the target low-voltage load device to be turned on or off, and controlling the low-voltage battery to power the target low-voltage load device, includes:

[0019] When the remaining power acquired 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, controlling the low-voltage battery 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;

[0020] When the remaining power acquired 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 power the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

[0021] In a possible implementation, the method further includes:

[0022] When the remaining power of the low-voltage battery is less than a preset power threshold, the high-voltage battery and a DCDC (direct current-to-direct current converter) converter of the vehicle are controlled to charge the low-voltage battery.

[0023] In a possible implementation, the method further includes:

[0024] When charging the low-voltage battery, the temperature of the low-voltage battery is obtained, and the target charging voltage of the low-voltage battery is determined based on the remaining power and temperature of the low-voltage battery. Based on the target charging voltage, the high-voltage battery and the DCDC converter are controlled to charge the low-voltage battery.

[0025] In a possible implementation, the method further includes:

[0026] If the control time for controlling the high-voltage battery and the DCDC converter to charge the low-voltage battery based on the target charging voltage reaches a preset time, and the charging voltage provided by the DCDC converter to the low-voltage battery does not reach the target charging voltage, the DCDC converter is controlled to charge the low-voltage battery with a preset fault backup voltage.

[0027] In a possible implementation, the method further includes:

[0028] When the vehicle is in a static parking mode, obtaining a parking time duration of the vehicle in the static parking mode;

[0029] When the parking time is longer than a 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.

[0030] In a second aspect, a low-voltage battery management device is provided, the device comprising:

[0031] An acquisition module, used for periodically acquiring the remaining power of the low-voltage battery of the vehicle;

[0032] A first determination module, configured to determine a 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 a plurality of preset power ranges;

[0033] A second determination 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, wherein 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, and the lower the preset power range, the lower the power supply 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;

[0034] The control module is used to control the functions of the target low-voltage load devices in the vehicle that are in the startup state to be turned on or off based on the target function control strategy of each low-voltage load device, and control the low-voltage battery to supply power to the target low-voltage load devices.

[0035] In a possible implementation, the preset power range includes a first power range and a second power range, and a lower limit of the second power range is equal to an upper limit of the first power range;

[0036] The function control strategy of the target low-voltage load device corresponding to the first power range is the first control strategy, and the function control strategy of 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 can be turned on by the target low-voltage load device include the first operating level of the target low-voltage load device, and in the second control strategy, the functions that can be turned on by the target load device include the first operating level of the target low-voltage load device and the second operating level of the target low-voltage load device, and the power supply required for the second operating level is greater than the power supply required for the first operating level.

[0037] In a possible implementation, the control module is used to:

[0038] 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 operation level of the target low-voltage load device is controlled to be turned off and the second operation level is activated, 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 operation level;

[0039] 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 operation level of the target low-voltage load device is controlled to be turned off and the first operation level is activated, 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 operation level;

[0040] 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 power the target low-voltage load device so that the target low-voltage load device continues to operate at the first operating level.

[0041] In a possible implementation, the control module is used to:

[0042] 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 function of the target low-voltage load device is controlled to be turned on or off, and the low-voltage battery is controlled to power the target low-voltage load device.

[0043] In a possible implementation, the control module is used to:

[0044] When the remaining power acquired 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, controlling the low-voltage battery 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;

[0045] When the remaining power acquired 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 power the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

[0046] In a possible implementation, the control module is further configured to:

[0047] When the remaining power of the low-voltage battery is less than a preset power threshold, the high-voltage battery and the DCDC converter of the vehicle are controlled to charge the low-voltage battery.

[0048] In a possible implementation, the control module is further configured to:

[0049] When charging the low-voltage battery, the temperature of the low-voltage battery is obtained, and the target charging voltage of the low-voltage battery is determined based on the remaining power and temperature of the low-voltage battery. Based on the target charging voltage, the high-voltage battery and the DCDC converter are controlled to charge the low-voltage battery.

[0050] In a possible implementation, the control module is further configured to:

[0051] If the control time for controlling the high-voltage battery and the DCDC converter to charge the low-voltage battery based on the target charging voltage reaches a preset time, and the charging voltage provided by the DCDC converter to the low-voltage battery does not reach the target charging voltage, the DCDC converter is controlled to charge the low-voltage battery with a preset fault backup voltage.

[0052] In a possible implementation, the control module is further configured to:

[0053] When the vehicle is in a static parking mode, obtaining a parking time duration of the vehicle in the static parking mode;

[0054] When the parking time is longer than a 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.

[0055] The beneficial effect brought about by the technical solution provided by the embodiment of the present disclosure is: the solution mentioned in the embodiment of the present 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, each function in the target low-voltage load device will be controlled to be reasonably turned on or off, so that the power supply required by the target low-voltage load device will be reduced accordingly, thereby reducing the power loss of the low-voltage battery and thus reducing the power consumption of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0057] Figure 1 is a flow chart of a low-voltage battery management method provided by an embodiment of the present disclosure;

[0058] Figure 2 is a flow chart of a low-voltage battery management method provided by an embodiment of the present disclosure;

[0059] Figure 3 is a flow chart of a low-voltage battery management method provided by an embodiment of the present disclosure;

[0060] Figure 4 is a flow chart of a low-voltage battery management method provided by an embodiment of the present disclosure;

[0061] Figure 5 It is a structural schematic diagram of a low-voltage battery management device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0062] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0063] Figure 1 and Figure 2 All of them are flow charts of a low-voltage battery management method provided by an embodiment of the present disclosure.

[0064] See also Figure 1 and Figure 2 , the embodiment comprises:

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

[0066] In implementation, a low-voltage battery sensor may be provided on the vehicle, which is electrically connected to the low-voltage battery on the vehicle. The low-voltage battery sensor periodically obtains various status parameters of the low-voltage battery, which may include the remaining power of the low-voltage battery, and the remaining power may be any value between 0% and 100%.

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

[0068] Each time the low-voltage battery sensor obtains the status parameters of the low-voltage battery, the status parameters may be sent to the controller of the vehicle.

[0069] Among them, the controller can be any device on the vehicle that can implement the control steps mentioned in the embodiments of the present disclosure, for example, it can be a body domain control ZCU (Zonal Control Unit, regional controller), etc., and the embodiments of the present disclosure are not limited to this.

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

[0071] In implementation, multiple preset power ranges can be pre-stored in the controller. When the controller receives the remaining power of the low-voltage battery sent by the low-voltage battery sensor, it can determine the preset power range to which the remaining power of the low-voltage battery belongs, and determine the preset power range to which the remaining power of the low-voltage battery belongs as the target preset power range.

[0072] In a possible implementation, the setting method of the multiple preset power ranges pre-stored in the controller may be: according to the preset range width, 100% of the remaining power is evenly distributed into multiple intervals, thereby obtaining multiple preset power ranges.

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

[0074] In another possible implementation, the method for setting the multiple preset power ranges pre-stored in the controller may also be: based on multiple preset power values, 100% of the remaining power is divided into multiple intervals, thereby obtaining multiple preset power ranges.

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

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

[0077] In implementation, the low-voltage battery can power multiple low-voltage load devices to realize various functions of the low-voltage load devices, wherein the low-voltage load devices are devices in the vehicle that need to be powered by a low-voltage battery, for example, the low-voltage load devices can be air conditioners, audio, displays, etc.

[0078] Each low-voltage load device may have one or more functions. For example, the functions of the air conditioner may include first-level cooling, second-level cooling, third-level cooling, first-level heating, second-level heating, third-level heating, dehumidification, etc., wherein the cooling effects of the first-level cooling, second-level cooling, and third-level cooling are enhanced in sequence, and the heating effects of the first-level heating, second-level heating, and third-level heating are enhanced in sequence.

[0079] In the embodiment of the present 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 supply 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 have different settings on whether multiple functions of the low-voltage load device can be enabled.

[0081] For a preset power range with a relatively low value, in the function control strategy of the low-voltage load device corresponding to the preset power range, the power supply required by the low-voltage battery for the function that can be turned on is relatively low. For a relatively high power range with a relatively high value, in the function control strategy of the low-voltage load device corresponding to the preset power range, the power supply required by the low-voltage battery for the function that can be turned on is relatively high.

[0082] For example, the target low-voltage load device is an air conditioner. When the preset power range is 35%-45%, in the function control strategy of the air conditioner corresponding to the preset power range, cooling level 1, heating level 1, and dehumidification functions are functions that can be turned on, and cooling level 2, cooling level 3, heating level 2, and heating level 3 are functions that cannot be turned on. When the preset power range is 45%-49%, in the function control strategy of the air conditioner corresponding to the preset power range, cooling level 1, cooling level 2, heating level 1, heating level 2, and dehumidification functions are functions that can be turned on, and cooling level 3 and heating level 3 are functions that cannot be turned on. When the preset power range is 49%-100%, in the function control strategy of the air conditioner corresponding to the preset power range, all functions of the air conditioner are functions that can be turned on.

[0083] In the embodiment of the present disclosure, the setting of multiple function control strategies for low-voltage load devices can be divided based on the power supply required to implement each function, and power restrictions are imposed on different function control strategies. Of course, the function control strategy can also be set based on other conditions, which is not limited by the embodiment of the present disclosure.

[0084] It is understandable that for some low-voltage load devices, when the number of preset power ranges is relatively large and the low-voltage load devices have fewer functions, the function control strategies corresponding to two or more adjacent preset power ranges may be the same, but the power supply required for the functions that can be turned on in the function control strategies corresponding to the preset power ranges with smaller values ​​will not be greater than the power supply required for the functions that can be turned on in the function control strategies corresponding to the preset power ranges with larger values.

[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 that is in the start-up state to be turned on or off, and control the low-voltage battery to supply power to the target low-voltage load device.

[0086] The target low-voltage load device is a low-voltage load device in a startup state among the multiple low-voltage load devices.

[0087] During implementation, after the target function control strategy of 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 startup state, the various functions of the target low-voltage load device can be restricted based on the target function control strategy, thereby achieving the purpose of reducing the power supplied by the low-voltage battery to it, and then reducing the power consumption of the entire vehicle.

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

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

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

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

[0092] In this case, the low-voltage battery can be controlled to supply power to the target low-voltage load device according to the target function control strategy, thereby limiting the function of the target low-voltage load device 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 entire vehicle.

[0093] In a possible implementation, for the preset power range and the corresponding function control strategy set by the above method, the control method of the controller may 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 controlled to be turned off and the second operating level is started, and the low-voltage battery is controlled to power 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 controlled to be turned off and the first operating level is started, and the low-voltage battery is controlled to power 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 implementation, generally, when the low-voltage battery is not in the charging process, the remaining power of the low-voltage battery will gradually decrease as the low-voltage battery 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, at this time, it can be determined 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 ranges determined for two consecutive cycles are both the second power range, which means that even if the remaining power of the low-voltage battery has been changing, the remaining power in the current cycle is still very stably in the second power range. At this time, the second control strategy corresponding to the second power can be determined as the target function control strategy. The functions that can be turned on in the second control strategy include the first operating level and the second operating level, which means that the highest level that the target low-voltage load device can start at this time is the second operating level. Therefore, in order to improve the user experience, the first operating level of the target low-voltage load device can be controlled to be in a closed state, and the second operating level can be controlled to start, and the low-voltage battery can be controlled to power 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, at this time, it can be determined 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 ranges determined for two consecutive cycles are both the first power range, which means that even if the remaining power of the low-voltage battery has been changing, the remaining power in the current cycle is still very stably in 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 turned on 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 a closed state, and control the first operating level to start, and control the low-voltage battery to power the target low-voltage load device to achieve 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. From the above content, it can be seen that in the previous cycle, the target low-voltage load device is usually in the second operating level, and in the current cycle, since the remaining power of the low-voltage battery is reduced to the first power range, at this time, the second operating level of the target low-voltage load device can be controlled to be closed, and the first operating level of the target low-voltage load device can be controlled to start, and the low-voltage battery is controlled to supply power for the target low-voltage load device to start the first operating level.

[0101] In this way, the various functions of the target low-voltage load equipment 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 required power supply of the target low-voltage load equipment is also reduced, thereby achieving the purpose of low power consumption of the entire 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, based on the remaining power of the voltage battery obtained in the current cycle, the function of the target low-voltage load device is controlled to be turned on or off, and the low-voltage battery is controlled to power the target low-voltage load device.

[0103] In implementation, 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] For the case where the remaining power of the above-mentioned low-voltage battery increases from the first power range to the second power range, the control method of the controller can be: 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 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 power the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

[0105] In implementation, in the previous cycle, the target low-voltage load device is usually in the first operating level, and in the current cycle, since the remaining power of the low-voltage battery increases to the second power range, at this time, the second control strategy can be controlled to implement, that is, the first operating level of the target low-voltage load device can be controlled to be closed, and the second operating level of the target low-voltage load device can be controlled to be started, and at the same time, the low-voltage battery is controlled to supply power to the target low-voltage load device to start the second operating level.

[0106] In this way, the various 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 power 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 entire vehicle.

[0107] Alternatively, when the remaining power of the low-voltage battery increases from the first power range to the second power range, the control method of the controller may 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 power 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 controlled to be turned off and the second operating level is started, and the low-voltage battery is controlled to power the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

[0110] In implementation, 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. 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 it is not greater than (i.e., less than or equal to), it means that the value of the remaining voltage of the low-voltage battery obtained in the current cycle may be a simple numerical jump, and the remaining power of the low-voltage battery may not increase to the second power range. The remaining power of the low-voltage battery obtained in the next cycle may jump back to the first power range. Therefore, at this time, the control strategy of the controller 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 power the target low-voltage load device to achieve the first operating level.

[0112] If it is greater than, 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 power the target low-voltage load device so that the target low-voltage load device can run at the second operating level.

[0113] In this way, the changes in the remaining variables of the low-voltage battery can be determined more accurately, and the functions of the target low-voltage load equipment can be adjusted more stably and accurately based on the changes, thereby achieving low power consumption of the entire vehicle while improving the user experience.

[0114] In one possible implementation, see Figure 3 The low-voltage battery management method provided in the embodiment of the present disclosure may also include the following processing method:

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

[0116] In implementation, a pre-set power threshold may be stored in the controller, and 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 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 various low-voltage load devices. Therefore, the controller can control the high-voltage battery and DCDC converter in the vehicle to charge the low-voltage battery.

[0119] Among them, the DCDC 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 transmits DC power to the DCDC converter. The DCDC converter steps down the received DC power and then transmits the stepped-down DC power to the low-voltage battery, thereby charging the low-voltage battery.

[0120] In this way, the status of the low-voltage battery is monitored in real time so that the low-voltage battery can be charged in time, and this charging method is applicable to any scenario of the vehicle (for example, it is applicable to the sleep state of the entire vehicle network and also to the non-sleep state of the entire vehicle network), ensuring that the entire vehicle is not out of power in any scenario during use, thereby improving the safety and reliability of the low-voltage battery power supply system, and thus improving the user experience.

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

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

[0123] In implementation, a pre-set charging control table may be stored in the controller, in which a correspondence between multiple remaining power ranges, multiple temperature ranges, and multiple target charging voltages is set, each remaining power range corresponds to all temperature ranges, and each temperature range in the multiple temperature ranges corresponding to each remaining power range also corresponds to a charging voltage.

[0124] When charging a low-voltage battery, obtain the remaining power of the low-voltage battery and the temperature of the low-voltage battery, then check the target remaining power range to which the remaining power of the low-voltage battery belongs among multiple remaining power ranges in the charging control table, and check the target temperature range to which the temperature of the low-voltage battery belongs among multiple temperature ranges corresponding to the target remaining power range in the charging control table, then check the charging voltage corresponding to the target temperature range corresponding to the target remaining power range in the charging control table, and the charging voltage is the target charging voltage.

[0125] The controller can control the DCDC 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 changes in the remaining power of the low-voltage battery during the charging process, thereby reducing the power consumption of the entire vehicle while achieving full charging of the low-voltage battery.

[0127] It can be understood that the various corresponding relationships in the above-mentioned charging control table can be set based on actual conditions, the actual charging requirements of the low-voltage battery, and the purpose of reducing the power consumption of the whole vehicle. They can be set based on various experimental results. The embodiments of this disclosure do not limit the specific values ​​therein.

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

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

[0130] In implementation, during the charging process of the low-voltage battery, the controller periodically determines the target charging voltage, so as to provide a suitable charging voltage for the low-voltage battery at all times. If the charging voltage provided by the DCDC converter to the low-voltage battery has not reached the target charging voltage when the time after the controller sends the target charging voltage to the DCDC converter reaches a preset time, then at this time, a hardware failure inside the DCDC converter, a command sent by the controller is lost, or information sent by the low-voltage battery sensor is lost, etc., which causes the DCDC converter to be unable to charge the low-voltage battery according to the preset method. At this time, the controller can control the DCDC converter to charge the low-voltage battery with a preset fault backup voltage.

[0131] The preset fault backup voltage can ensure that the low-voltage battery will not run out of power, thereby improving the safety and reliability of the power supply system of the low-voltage battery, and further improving the user experience.

[0132] Among them, the preset fault backup voltage can be set according to the parameters of the low-voltage battery and the power supply requirements of various low-voltage load devices. For example, it can be 13.8 volts, etc., which is not limited in the embodiments of the present disclosure.

[0133] In one possible implementation, see Figure 4 The low-voltage battery management method provided in the embodiment of the present disclosure may also include the following processing method:

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

[0135] Among them, the static parking mode may include a static parking scenario when the vehicle is powered off and a static parking scenario when the vehicle is powered on.

[0136] In implementation, a plurality of low-voltage load devices that do not affect the operation of the vehicle are pre-stored in the controller.

[0137] If the parking time of the vehicle is greater than the preset parking time, it means that the parking time of the vehicle is relatively long. At this time, the controller can determine the target low-voltage load device that does not affect the operation of the vehicle from the multiple target low-voltage load devices that are currently in the startup state based on the pre-stored multiple low-voltage load devices that do not affect the operation of the vehicle, and then control the target low-voltage load device that does not affect the operation of the vehicle to be turned off, that is, the low-voltage battery is no longer needed to power it, thereby achieving the purpose of reducing the power consumption of the entire vehicle.

[0138] It can be understood that the selection of the above-mentioned low-voltage load equipment that does not affect the operation of the vehicle can be based on the service object of the vehicle or the vehicle's own function, or it can be set by the driver according to his own needs, etc., and the embodiments of the present disclosure are not limited to this.

[0139] Moreover, when the vehicle is in static parking mode, if the controller detects abnormal power usage, the controller can control some target low-voltage load devices to shut down and send deep sleep instructions, thereby reducing the power consumption of the entire vehicle.

[0140] At the same time, T-Box (TelematicsBOX, remote information processor) can send abnormal power consumption to the cloud, sort out cloud data, solve abnormal power consumption and optimize the design.

[0141] All the above optional technical solutions can be arbitrarily combined to form optional embodiments of the present disclosure, and will not be described in detail here.

[0142] The scheme mentioned in the embodiment of the present 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, each function in the target low-voltage load device will be controlled to be reasonably turned on or off, so that the power supply required by the target low-voltage load device will be reduced accordingly, thereby reducing the power loss of the low-voltage battery and thus reducing the power consumption of the entire vehicle.

[0143] The present disclosure provides a low-voltage battery management device, which may be the computer device in the above embodiment, such as Figure 5 As shown, the device comprises:

[0144] An acquisition module 510, used for periodically acquiring the remaining power of the low-voltage battery of the vehicle;

[0145] A first determining module 520, configured to determine a 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 a plurality of preset power ranges;

[0146] The second determination 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, wherein 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, and the lower the preset power range, the lower the power supply 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 functions of the target low-voltage load devices in the vehicle that are in the start-up state to be turned on or off based on the target function control strategy of each low-voltage load device, and control the low-voltage battery to supply power to the target low-voltage load devices.

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

[0149] The function control strategy of the target low-voltage load device corresponding to the first power range is the first control strategy, and the function control strategy of 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 can be turned on by the target low-voltage load device include the first operating level of the target low-voltage load device, and in the second control strategy, the functions that can be turned on by the target load device include the first operating level of the target low-voltage load device and the second operating level of the target low-voltage load device, and the power supply required for the second operating level is greater than the power supply required for the first operating level.

[0150] In a 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 operation level of the target low-voltage load device is controlled to be turned off and the second operation level is activated, 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 operation 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 operation level of the target low-voltage load device is controlled to be turned off and the first operation level is activated, 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 operation 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 power the target low-voltage load device so that the target low-voltage load device continues to operate at the first operating level.

[0154] In a 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 function of the target low-voltage load device is controlled to be turned on or off, and the low-voltage battery is controlled to power the target low-voltage load device.

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

[0157] When the remaining power acquired 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, controlling the low-voltage battery 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 acquired 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 power the target low-voltage load device so that the target low-voltage load device operates at the second operating level.

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

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

[0161] In a 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 obtained, and the target charging voltage of the low-voltage battery is determined based on the remaining power and temperature of the low-voltage battery. Based on the target charging voltage, the high-voltage battery and the DCDC converter are controlled to charge the low-voltage battery.

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

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

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

[0166] When the vehicle is in a static parking mode, obtaining a parking time duration of the vehicle in the static parking mode;

[0167] When the parking time is longer than a 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 embodiment only uses the division of the above functional modules as an example when managing the low-voltage battery. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the low-voltage battery management device provided in the above embodiment and the low-voltage battery management method embodiment belong to the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0169] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0170] It should be noted that the information (including but not limited to user device 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, etc.) involved in this disclosure are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards of relevant countries and regions. For example, the "remaining power of the low-voltage battery", "function control strategy", "temperature of the low-voltage battery", etc. involved in this disclosure are all obtained with full authorization.

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

Claims

1. A method for managing a low-voltage battery, characterized in that: The method comprises: Periodically obtaining the remaining power of the low-voltage battery of the vehicle; Based on the remaining power of the low-voltage battery and a plurality of preset power ranges, determining a 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 function control strategy of each low-voltage load device, determine the target function control strategy of each low-voltage load device corresponding to the target preset power range, wherein 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, and the lower the preset power range, the lower the power supply 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; 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 that is in the startup 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, characterized in that The preset power range includes a first power range and a second power range, and the lower limit of the second power range is equal to the upper limit of the first power range; The function control strategy of the target low-voltage load device corresponding to the first power range is the first control strategy, and the function control strategy of 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 can be turned on by the target low-voltage load device include the first operating level of the target low-voltage load device, and in the second control strategy, the functions that can be turned on by the target load device include the first operating level of the target low-voltage load device and the second operating level of the target low-voltage load device, and the power supply required for the second operating level is greater than the power supply required for the first operating level.

3. The method according to claim 2, characterized in that The target function control strategy based on each low-voltage load device controls the function of the target low-voltage load device in the vehicle that is in the startup state to be turned on or off, and controls the low-voltage battery to supply power to the target low-voltage load device, 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 operation level of the target low-voltage load device is controlled to be turned off and the second operation level is activated, 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 operation 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 operation level of the target low-voltage load device is controlled to be turned off and the first operation level is activated, 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 operation 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 power 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, characterized in that The target function control strategy based on each low-voltage load device controls the function of the target low-voltage load device in the vehicle that is in the startup state to be turned on or off, and controls the low-voltage battery to supply power to the target low-voltage load device, 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 function of the target low-voltage load device is controlled to be turned on or off, and the low-voltage battery is controlled to power the target low-voltage load device.

5. The method according to claim 4, characterized in that The method of 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: When the remaining power acquired 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, controlling the low-voltage battery 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 acquired 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 power 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, characterized in that The method further comprises: When the remaining power of the low-voltage battery is less than a preset power threshold, the high-voltage battery and the DCDC converter of the vehicle are controlled to charge the low-voltage battery.

7. The method according to claim 6, characterized in that The method further comprises: When charging the low-voltage battery, the temperature of the low-voltage battery is obtained, and the target charging voltage of the low-voltage battery is determined based on the remaining power and temperature of the low-voltage battery. Based on the target charging voltage, the high-voltage battery and the DCDC converter are controlled to charge the low-voltage battery.

8. The method according to claim 7, characterized in that The method further comprises: If the control time for controlling the high-voltage battery and the DCDC converter to charge the low-voltage battery based on the target charging voltage reaches a preset time, and the charging voltage provided by the DCDC converter to the low-voltage battery does not reach the target charging voltage, the DCDC converter is controlled to charge the low-voltage battery with a preset fault backup voltage.

9. The method according to claim 1, characterized in that: The method further comprises: When the vehicle is in a static parking mode, obtaining a parking time duration of the vehicle in the static parking mode; When the parking time is longer than a 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 low-voltage battery management device, characterized in that: The device comprises: An acquisition module, used for periodically acquiring the remaining power of the low-voltage battery of the vehicle; A first determining module, configured to determine a 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 a plurality of preset power ranges; A second determination 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, wherein 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, and the lower the preset power range, the lower the power supply 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 startup state to be turned on or off based on the target function control strategy of each low-voltage load device, and control the low-voltage battery to supply power to the target low-voltage load devices.

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