Method and apparatus for managing low voltage battery

Abstract

The disclosure provides a management method and device of a low-voltage battery, and belongs to the technical field of vehicles. The method comprises the following steps: determining a target preset power range based on the residual power of the low-voltage battery and a plurality of preset power ranges; determining 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 power required by the functions 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 functions in the target low-voltage load device in the starting state of the vehicle are controlled to be turned on or turned off, and the low-voltage battery is controlled to supply power to the target low-voltage load device. By using the disclosure, the power consumption of the whole vehicle is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vehicles, and in particular to a management method and device of a low-voltage battery. BACKGROUND

[0002] With the advent of the new four modernizations of vehicle intelligence, networking, electrification and sharing, more and more functions are set on vehicles to improve user experience, such as networking functions and the like. Many load devices that implement these functions need a low-voltage battery to supply power to them.

[0003] During the use of the vehicle, the low-voltage battery continuously supplies power to these load devices whether the vehicle is in a powered-on state or a powered-off state, but this method results in high vehicle power consumption. SUMMARY

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

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

[0006] periodically acquiring a remaining power of the low-voltage battery of the vehicle;

[0007] determining 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;

[0008] determining a target function control strategy of each low-voltage load device corresponding to the target preset power range based on a corresponding relationship 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 power required by 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] controlling the functions of the target low-voltage load device in a starting state in the vehicle to be turned on or turned 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.

[0010] In a possible implementation manner, the preset power range comprises 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.

[0011] The target low-voltage load device corresponding to the first electric quantity range has a first control strategy for function control, and the target low-voltage load device corresponding to the second electric quantity range has a second control strategy for function control. In the first control strategy, the target low-voltage load device can be started in a first running level. In the second control strategy, the target low-voltage load device can be started in the first running level and a second running level, and the second running level requires more power than the first running level.

[0012] In a possible implementation, the method comprises:

[0013] When the target preset electric quantity range determined in the current period and the target preset electric quantity range determined in the previous period are both the second electric quantity range, the first running level of the target low-voltage load device is controlled to be turned off, the second running level of the target low-voltage load device is controlled to be 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 runs in the second running level.

[0014] When the target preset electric quantity range determined in the current period is the first electric quantity range and the target preset electric quantity range determined in the previous period is the second electric quantity range, the second running level of the target low-voltage load device is controlled to be turned off, the first running level of the target low-voltage load device is controlled to be 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 runs in the first running level.

[0015] When the target preset electric quantity range determined in the current period and the target preset electric quantity range determined in the previous period are both the first electric quantity 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 run in the first running level.

[0016] In a possible implementation, the method comprises:

[0017] When the target preset power range determined in the current period is the second power range, and the target preset power range determined in the previous period is the first power range, based on the remaining power of the voltage battery obtained in the current period, the function in the target low-voltage load device is controlled to be turned on or turned off, and the low-voltage battery is controlled to supply power to the target low-voltage load device.

[0018] In a possible implementation, the control, based on the remaining power of the voltage battery obtained in the current period, of the function in the target low-voltage load device to be turned on or turned off, and the control of the low-voltage battery to supply power to the target low-voltage load device, include:

[0019] When the remaining power obtained in the current period is less than or equal to the sum of the lower limit of the second power range and a preset hysteresis width, the low-voltage battery is controlled to supply power to the target low-voltage load device to enable the target low-voltage load device to continue to operate at the first operating level, wherein the preset hysteresis width is a positive value.

[0020] When the remaining power obtained in the current period is greater than the sum of the lower limit of the second power range and a preset hysteresis width, the first operating level of the target low-voltage load device is controlled to be turned off, the second operating level of the target low-voltage load device is controlled to be started, and the low-voltage battery is controlled to supply power to the target low-voltage load device to enable the target low-voltage load device to operate 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 the 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 the low-voltage battery is being charged, the temperature of the low-voltage battery is obtained, the target charging voltage of the low-voltage battery is determined based on the remaining power and the temperature of the low-voltage battery, and the high-voltage battery and the DCDC converter are controlled to charge the low-voltage battery based on the target charging voltage.

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

[0026] If a control duration, in which the high-voltage battery and the DCDC converter control charging of the low-voltage battery based on the target charging voltage, reaches a preset duration, and a charging voltage provided by the DCDC converter for 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, a parking duration, in which the vehicle is in the static parking mode, is acquired.

[0029] When the parking duration is greater than a preset parking duration, the low-voltage battery is controlled to stop supplying power to part of target low-voltage load devices in a plurality of target low-voltage load devices.

[0030] In a second aspect, a management apparatus of a low-voltage battery is provided, and the apparatus includes:

[0031] An acquisition module is configured to periodically acquire a remaining power of the low-voltage battery of a vehicle.

[0032] A first determination module is 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 configured to determine a target function control strategy of each low-voltage load device corresponding to the target preset power range, based on a corresponding relationship 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 is, the lower the power supply power required by the function that can be turned on in the function control strategy of the low-voltage load device corresponding to the preset power range is.

[0034] A control module is configured to control a function of a target low-voltage load device in a starting state of the vehicle to be turned on or turned off, and control the low-voltage battery to supply power to the target low-voltage load device, based on the target function control strategy of each low-voltage load device.

[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 first electric quantity range corresponds to a first control strategy of a function control strategy of the target low-voltage load device, the second electric quantity range corresponds to a second control strategy of the function control strategy of the target low-voltage load device, the functions that can be turned on in the first control strategy of the target low-voltage load device include a first running level of the target low-voltage load device, the functions that can be turned on in the second control strategy of the target low-voltage load device include the first running level of the target low-voltage load device and a second running level of the target low-voltage load device, and the power supply required by the second running level is greater than the power supply required by the first running level.

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

[0038] When the target preset electric quantity range determined in the current period and the target preset electric quantity range determined in the previous period are both the second electric quantity range, the first running level of the target low-voltage load device is controlled to be turned off, the second running level of the target low-voltage load device is controlled to be 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 runs at the second running level.

[0039] When the target preset electric quantity range determined in the current period is the first electric quantity range and the target preset electric quantity range determined in the previous period is the second electric quantity range, the second running level of the target low-voltage load device is controlled to be turned off, the first running level of the target low-voltage load device is controlled to be 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 runs at the first running level.

[0040] When the target preset electric quantity range determined in the current period and the target preset electric quantity range determined in the previous period are both the first electric quantity 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 run at the first running level.

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

[0042] When the target preset electric quantity range determined in the current period is the second electric quantity range and the target preset electric quantity range determined in the previous period is the first electric quantity range, based on the remaining electric quantity of the voltage battery acquired in the current period, the functions in the target low-voltage load device are controlled to be turned on or turned off, and the low-voltage battery is controlled to supply power to the target low-voltage load device.

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

[0044] when the remaining power obtained in the current period is less than or equal to a sum of the lower limit of the second power range and a preset hysteresis width, controlling the low-voltage battery to supply power to the target low-voltage load device to enable the target low-voltage load device to continue operating at the first operating level, wherein the preset hysteresis width is positive;

[0045] when the remaining power obtained in the current period is greater than the sum of the lower limit of the second power range and the preset hysteresis width, controlling the first operating level of the target low-voltage load device to be closed, the second operating level to be started, and controlling the low-voltage battery to supply power to the target low-voltage load device to enable the target low-voltage load device to operate 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, controlling the high-voltage battery and the DCDC converter of the vehicle 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, obtaining a temperature of the low-voltage battery, determining a target charging voltage of the low-voltage battery based on the remaining power and the temperature of the low-voltage battery, and controlling the high-voltage battery and the DCDC converter to charge the low-voltage battery based on the target charging voltage.

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

[0051] if a control duration of controlling the high-voltage battery and the DCDC converter to charge the low-voltage battery based on the target charging voltage reaches a preset duration, and a charging voltage provided by the DCDC converter for the low-voltage battery does not reach the target charging voltage, controlling the DCDC converter to charge the low-voltage battery at 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 duration of the vehicle in the static parking mode;

[0054] when the parking duration is greater than a preset parking duration, controlling the low-voltage battery to stop supplying power to part of the target low-voltage load devices in the plurality of target low-voltage load devices.

[0055] The technical scheme provided by the embodiments of the present disclosure has the beneficial effects that: the scheme mentioned in the embodiments of the present disclosure matches 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 are controlled to be reasonably turned on or turned off, so that the power supply required by the target low-voltage load device is reduced, thereby reducing the power consumption of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

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

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

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

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

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

[0062] In order to make the purpose, technical scheme and advantages of the present disclosure clearer, the embodiments of the present disclosure will be further described in detail below with reference to the drawings.

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

[0064] Referring to Figure 1 and Figure 2 , the embodiment includes:

[0065] 101, periodically acquiring the remaining power of the low-voltage battery of the vehicle.

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

[0067] The state parameters acquired by the low-voltage battery sensor can also include the current current range available for the low-voltage battery, the current supply current, and the like, and can also include other state parameters of the low-voltage battery.

[0068] After the low-voltage battery sensor acquires the state parameters of the low-voltage battery each time, the low-voltage battery sensor can send the state parameters to a controller of the vehicle.

[0069] 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, can be a ZCU (Zonal Control Unit, regional controller), and the like, which is not limited in the embodiments of the present disclosure.

[0070] 102. Determine a target preset capacity range to which the remaining capacity of the low-voltage battery belongs based on the remaining capacity of the low-voltage battery and the plurality of preset capacity ranges.

[0071] In implementation, the controller can pre-store a plurality of preset capacity ranges. When the controller receives the remaining capacity of the low-voltage battery sent by the low-voltage battery sensor, the controller can determine the preset capacity range to which the remaining capacity of the low-voltage battery belongs, and determine the preset capacity range to which the remaining capacity of the low-voltage battery belongs as the target preset capacity range.

[0072] In a possible implementation, the setting method of the plurality of preset capacity ranges pre-stored in the controller can be: according to a preset range width, evenly distributing the 100% remaining capacity into a plurality of intervals, thereby obtaining the plurality of preset capacity ranges.

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

[0074] In another possible implementation, the setting method of the plurality of preset capacity ranges pre-stored in the controller can also be: based on a plurality of preset capacity values, dividing the 100% remaining capacity into a plurality of intervals, thereby obtaining the plurality of preset capacity ranges.

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

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

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

[0078] Each low-voltage load device can have one or more functions. For example, the functions of the air conditioner can include cooling level 1, cooling level 2, cooling level 3, heating level 1, heating level 2, heating level 3, dehumidification function, etc. The cooling effect of cooling level 1, cooling level 2, and cooling level 3 is enhanced in turn, and the heating effect of heating level 1, heating level 2, and heating level 3 is enhanced in turn.

[0079] In the embodiments 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 by the functions 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 a plurality of function control strategies. For the same low-voltage load device, different function control strategies have different settings on whether the functions of the low-voltage load device can be turned on.

[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 low-voltage battery provides a low power supply for the functions that can be turned on. For a preset 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 low-voltage battery provides a high power supply for the functions that can be turned on.

[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 power ranges include 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 plurality of 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 a first control strategy, and the function control strategy of the target low-voltage load device corresponding to the second power range is a second control strategy. In the first control strategy, the functions that can be turned on by the target low-voltage load device include a 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 low-voltage load device include the first operating level of the target low-voltage load device and a second operating level of the target low-voltage load device. The power supply required by the second operating level is greater than the power supply required by 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 cooling level one, and the functions that can be turned on 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 by cooling level two is also greater than that required by cooling level one.

[0092] For 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, so as to limit 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 whole vehicle.

[0093] In a possible implementation, for the preset power ranges and the corresponding function control strategies set by the above method, the control method of the controller can be:

[0094] When the target preset power range determined in the current period and the target preset power range determined in the previous period are both the second power range, the first operating level of the target low-voltage load device is controlled to be turned off, the second operating level of the target low-voltage load device is controlled to be 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.

[0095] When the target preset power range determined in the current period is the first power range, and the target preset power range determined in the previous period is the second power range, the second operation level of the target low-voltage load device is controlled to be closed, the first operation level is controlled to be started, and the low-voltage battery is controlled to supply power to the target low-voltage load device to enable the target low-voltage load device to operate at the first operation level.

[0096] When the target preset power range determined in the current period and the target preset power range determined in the previous period are both the first power range, the low-voltage battery is controlled to supply power to the target low-voltage load device to enable the target low-voltage load device to continue operating at the first operation level.

[0097] In practice, generally, when the low-voltage battery is not in the charging process, the remaining power of the low-voltage battery gradually decreases as power is supplied to each target low-voltage load device.

[0098] If the target preset power range determined in the current period is the second power range, it can be determined whether the target preset power range determined in the previous period is the second power range. If so, it indicates that the target preset power ranges determined in two consecutive periods are both the second power range, which means that even though the remaining power of the low-voltage battery is always changing, the remaining power in the current period is still very stable in 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 turned on in the second control strategy include the first operation level and the second operation level, which means that the highest level that the target low-voltage load device can start at this time is the second operation level. Therefore, to improve the user experience, the first operation level of the target low-voltage load device can be controlled to be in a closed state, the second operation level is controlled to be started, and the low-voltage battery is controlled to supply power to the target low-voltage load device to enable the second operation level of the target low-voltage load device to start.

[0099] Similarly, if the target preset power range determined in the current period is the first power range, it can be determined whether the target preset power range determined in the previous period is the first power range. If so, it indicates that the target preset power ranges determined in two consecutive periods are both the first power range, which means that even though the remaining power of the low-voltage battery is always changing, the remaining power in the current period is still very stable in the first power range. At this time, the first control strategy corresponding to the first power range can be determined as the target function control strategy. The functions that can be turned on in the first control strategy include the first operation level, which means that the highest level that the target low-voltage load device can start at this time is the first operation level. Therefore, the controller can control the second operation level of the target low-voltage load device to be in a closed state, control the first operation level to be started, and control the low-voltage battery to supply power to the target low-voltage load device to enable the first operation level of the target low-voltage load device to start.

[0100] If the target preset power range determined in the current period is the first power range, but the target preset power range determined in the previous period is the second power range, it indicates that the remaining power of the low-voltage battery decreases from the second power range to the first power range in the period from the previous period to the current period. As known from the above, in the previous period, the target low-voltage load device is usually in the second running level, and in the current period, the remaining power of the low-voltage battery decreases to the first power range. At this time, the second running level of the target low-voltage load device can be controlled to be closed, the first running level of the target low-voltage load device can be controlled to be started, and the low-voltage battery can be controlled to supply power for starting the first running level of the target low-voltage load device.

[0101] In this way, the functions of the target low-voltage load device can be limited 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 device also decreases, thereby achieving the purpose of low power consumption of the whole vehicle.

[0102] In a possible implementation, when the target preset power range determined in the current period is the second power range, and the target preset power range determined in the previous period is the first power range, the remaining power of the low-voltage battery obtained in the current period is used to control the functions of the target low-voltage load device to be started or stopped, and the low-voltage battery is controlled to supply power for the target low-voltage load device.

[0103] In implementation, if the target preset power range determined in the current period is the second power range, but the target preset power range determined in the previous period is the first power range, it indicates that the low-voltage battery can be in a charging state to increase the remaining power of the low-voltage battery from the first power range to the second power range in the period from the previous period to the current period. At this time, the remaining power of the low-voltage battery in the current period can be obtained, and then the controller can control the functions of the target low-voltage load device to be started or stopped based on the remaining power, and control the low-voltage battery to supply power for the target low-voltage load device.

[0104] For the case that 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 can be: when the target preset power range determined in the current period is the second power range, and the target preset power range determined in the previous period is the first power range, the first running level of the target low-voltage load device is controlled to be closed, the second running level of the target low-voltage load device is controlled to be started, and the low-voltage battery is controlled to supply power for the target low-voltage load device so that the target low-voltage load device operates in the second running level.

[0105] In implementation, in the previous cycle, the target low-voltage load device is generally in the first running level, and in the current cycle, due to the increase of the remaining power of the low-voltage battery to the second power range, the second control strategy can be controlled to be implemented, that is, the first running level of the target low-voltage load device can be controlled to be closed, and the second running level of the target low-voltage load device can be controlled to be started, and the low-voltage battery can be controlled to supply power for the target low-voltage load device to start the second running level.

[0106] In this way, according to the target preset power range to which the remaining power belongs, the functions of the target low-voltage load device can be limited and adjusted, and as the remaining power of the low-voltage battery increases, the power supply capacity of the low-voltage battery for the target low-voltage load device also increases, and at this time, the target low-voltage load device is controlled to be promoted from the first running level to the second running level, thereby ensuring the low power consumption of the whole vehicle and improving the user experience.

[0107] Alternatively, for the case that 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 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 for the target low-voltage load device to make the target low-voltage load device continue to run in the first running 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 running level of the target low-voltage load device is controlled to be closed, the second running level of the target low-voltage load device is controlled to be started, and the low-voltage battery is controlled to supply power for the target low-voltage load device to make the target low-voltage load device run in the second running 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, in order to determine whether the remaining power of the low-voltage battery in the current cycle indeed increases 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 is judged 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 not greater than (i.e. less than or equal to), it indicates that the value of the remaining voltage of the low-voltage battery obtained in the current period may be a simple numerical jump, and the remaining capacity of the low-voltage battery may not rise to the second capacity range, and the remaining capacity of the low-voltage battery obtained in the next period may also jump back to the first capacity 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 supply power for the target low-voltage load device to realize the first operating level.

[0112] If greater than, it indicates that the remaining capacity of the low-voltage battery obtained in the current period has indeed risen to the second capacity range. At this time, the controller can control to realize the second control strategy corresponding to the second capacity range, that is, to control the first operating level of the target low-voltage load device to be closed, the second operating level to be started, and to control the low-voltage battery to supply power for the target low-voltage load device so that the target low-voltage load device can operate at the second operating level.

[0113] In this way, the change of the remaining capacity of the low-voltage battery can be more accurately determined, and the function of the target low-voltage load device can be more stably and accurately adjusted according to the change, so that the low power consumption of the whole vehicle is realized, and the user experience is improved.

[0114] In a possible implementation manner, referring to Figure 3 The management method of the low-voltage battery provided by the embodiment of the disclosure can further include the following processing method.

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

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

[0117] If the remaining capacity of the low-voltage battery is greater than or equal to the preset capacity threshold, it indicates that the remaining capacity of the low-voltage battery at this time is sufficient to supply power to each low-voltage load device. Therefore, at this time, the low-voltage battery does not need to be charged.

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

[0119] The DCDC converter is electrically connected with the high-voltage battery and the low-voltage battery respectively. During charging of the low-voltage battery, the high-voltage battery supplies direct current to the DCDC converter, the DCDC converter reduces the voltage of the received direct current, and then supplies the reduced direct current to the low-voltage battery, so as to charge the low-voltage battery.

[0120] In this way, the low-voltage battery is charged in time by monitoring the state of the low-voltage battery in real time, and the charging method is applicable to any scene of the vehicle (for example, applicable to the whole vehicle network sleep state, and also applicable to the whole vehicle network non-sleep state), so that the low-voltage battery is not short of power in each scene during use of the whole vehicle, thereby improving the safety and reliability of the power supply system of the low-voltage battery, and further improving the user experience.

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

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

[0123] In implementation, the controller can store a pre-set charging control table, in which a plurality of remaining power ranges, a plurality of temperature ranges, and a corresponding relationship between a plurality of target charging voltages are set. Each remaining power range corresponds to all temperature ranges, and each temperature range in the plurality of temperature ranges corresponding to each remaining power range corresponds to a charging voltage.

[0124] When charging the low-voltage battery, the remaining power of the low-voltage battery and the temperature of the low-voltage battery are acquired, then in the plurality of remaining power ranges in the charging control table, the target remaining power range to which the remaining power of the low-voltage battery belongs is found, and in the plurality of temperature ranges corresponding to the target remaining power range in the charging control table, the target temperature range to which the temperature of the low-voltage battery belongs is found, and then in the charging control table, the charging voltage corresponding to the target temperature range corresponding to the target remaining power range is found. The charging voltage is the target charging voltage.

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

[0126] In this way, the charging voltage of the low-voltage battery can be adjusted in real time according to the change of the remaining power of the low-voltage battery during charging, so as to realize full charging of the low-voltage battery while reducing the power consumption of the whole vehicle.

[0127] It can be understood that the various corresponding relationships in the above charging control table can be set according to actual conditions, actual charging needs of the low-voltage battery, and the purpose of reducing the power consumption of the whole vehicle, or can be set according to various experimental results, and specific values thereof are not limited in the embodiments of the present disclosure.

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

[0129] If the control duration of the high-voltage battery and the DCDC converter charging the low-voltage battery based on the target charging voltage reaches the preset duration, and the charging voltage provided by the DCDC converter for 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 of the low-voltage battery, the controller periodically determines the target charging voltage, so as to always provide appropriate charging voltage for the low-voltage battery. If the duration after the controller sends the target charging voltage to the DCDC converter reaches the preset duration, and the charging voltage provided by the DCDC converter for the low-voltage battery has not reached the target charging voltage, at this time, the fault conditions such as internal hardware failure of the DCDC converter, loss of instructions sent by the controller, or loss of information sent by the low-voltage battery sensor may occur, thereby causing 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 does 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] The preset fault backup voltage can be set according to the parameters of the low-voltage battery and the power supply needs of each low-voltage load device, for example, can be 13.8 volts, etc., and the embodiments of the present disclosure are not limited thereto.

[0133] In a possible implementation, referring to Figure 4 The management method of the low-voltage battery provided by the embodiments of the present disclosure can further include the following processing method:

[0134] When the vehicle is in a static parking mode, the parking duration of the vehicle in the static parking mode is acquired; and when the parking duration is greater than a preset parking duration, the low-voltage battery is controlled to stop supplying power to part of the target low-voltage load devices in the plurality of target low-voltage load devices.

[0135] The static parking mode can include a static parking scenario when the vehicle is powered off and a static parking scenario during the power-on process of the vehicle.

[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 vehicle power consumption.

[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, such as... Figure 5 As shown, 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 configured to determine, based on a correspondence between the preset power range and the function control strategy of each low-voltage load device, a 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 started, and the lower the preset power range, the lower the power supply required by the function that can be started in the function control strategy of the low-voltage load device corresponding to the preset power range.

[0147] The control module 540 is configured to control the functions of the target low-voltage load device in the starting state in the vehicle to start or stop 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 device.

[0148] In a possible implementation, 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.

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

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

[0151] When the target preset power range determined in the current period and the target preset power range determined in the previous period are both the second power range, the control module 540 controls the first running level of the target low-voltage load device to be closed, the second running level of the target low-voltage load device 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 running level.

[0152] When the target preset power range determined in the current period is the first power range and the target preset power range determined in the previous period is the second power range, the control module 540 controls the second running level of the target low-voltage load device to be closed, the first running level of the target low-voltage load device 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 first running level.

[0153] When the target preset power range determined in the current period and the target preset power range determined in the previous period are both the first power range, the low-voltage battery is controlled to supply power to the target low-voltage load device to enable the target low-voltage load device to continue operating 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 period is the second power range and the target preset power range determined in the previous period is the first power range, the control module 540 is configured to: based on the remaining power of the voltage battery obtained in the current period, control a function in the target low-voltage load device to be turned on or turned off, and control the low-voltage battery to supply power to the target low-voltage load device.

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

[0157] When the remaining power obtained in the current period is less than or equal to the sum of the lower limit of the second power range and a preset hysteresis width, the low-voltage battery is controlled to supply power to the target low-voltage load device to enable the target low-voltage load device to continue operating at the first operating level, where the preset hysteresis width is a positive value.

[0158] When the remaining power obtained in the current period is greater than the sum of the lower limit of the second power range and a preset hysteresis width, the first operating level of the target low-voltage load device is controlled to be turned off, the second operating level of the target low-voltage load device is controlled to be started, and the low-voltage battery is controlled to supply power to the target low-voltage load device to enable the target low-voltage load device to operate 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 the low-voltage battery is being charged, the temperature of the low-voltage battery is obtained, the target charging voltage of the low-voltage battery is determined based on the remaining power and the temperature of the low-voltage battery, and the high-voltage battery and the DCDC converter are controlled to charge the low-voltage battery based on the target charging voltage.

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

[0164] If the control duration of the high-voltage battery and the DCDC converter charging the low-voltage battery based on the target charging voltage reaches a preset duration, and the charging voltage provided by the DCDC converter for 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 the static parking mode, the parking duration of the vehicle in the static parking mode is acquired;

[0167] When the parking duration is greater than a preset parking duration, the low-voltage battery is controlled to stop supplying power to part of the target low-voltage load devices.

[0168] It should be noted that the low-voltage battery management device provided in the above embodiments is only exemplified by the division of the above functional modules when managing the low-voltage battery. In actual applications, the above functions can be completed by different functional modules according to needs, 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 and the low-voltage battery management method provided in the above embodiments belong to the same concept, and the specific implementation process is described in the method embodiments, which will not be repeated here.

[0169] Those skilled in the art can understand that all or part of the steps of the above embodiments can be completed by hardware, or by programs instructing related hardware to complete. The programs can be stored in a computer readable storage medium. The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk.

[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 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 the present disclosure are all authorized by the user or fully authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of relevant countries and regions. For example, the "remaining capacity of the low-voltage battery", "function control strategy", "temperature of the low-voltage battery" and the like involved in the present disclosure are all obtained under sufficient authorization.

[0171] The above merely describes optional embodiments of the present disclosure, and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle 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 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, a target preset power range to which the remaining power of the low-voltage battery belongs is determined, wherein 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; 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 indicates whether each function of the low-voltage load device can be activated. The lower the preset power range, the lower the power required for the functions that can be activated in the functional control strategy of the low-voltage load device corresponding to the preset power range. The functional control strategy of the target low-voltage load device corresponding to the first power range is the first control strategy, and the functional 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 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 both the first operating level and the second operating level of the target low-voltage load device. The power required for the second operating level is greater than or equal to the power required for the first operating level. Based on the target function control strategy of each low-voltage load device, the functions of the target low-voltage load devices in the vehicle that are in the starting state are controlled to be turned on or off, and the low-voltage battery is controlled 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 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 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 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 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.

2. The method according to claim 1, characterized in that, 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.

3. The method according to claim 2, characterized in that, 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.

4. The method according to claim 1, characterized in that, 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.

5. The method according to claim 4, characterized in that, 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.

6. The method according to claim 5, characterized in that, 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.

7. The method according to claim 1, characterized in that, 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.

8. A low-voltage battery management device according to the low-voltage battery management method of claim 1, characterized in that, 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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