A method for determining a charging voltage of a low-voltage storage battery of a vehicle and a related device

Abstract

The embodiment of the application relates to the field of automobiles, and in particular to a vehicle low-voltage storage battery charging voltage determination method and related equipment. The method comprises the following steps: acquiring the residual capacity of a power battery, the residual capacity of a low-voltage storage battery and an ambient temperature; if the residual capacity of the low-voltage storage battery is not acquired, determining the charging voltage of the low-voltage storage battery according to the ambient temperature; and if the residual capacity of the low-voltage storage battery is acquired, determining the charging voltage of the low-voltage storage battery based on the residual capacity of the power battery, the residual capacity of the low-voltage storage battery and the ambient temperature.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of automobiles, and in particular to a method for determining charging voltage of a low-voltage storage battery of a vehicle and related equipment. BACKGROUND

[0002] In a low-voltage system of a current new energy electric vehicle or a hybrid vehicle, a direct current conversion module (DCDC module) charges a low-voltage storage battery. The charging strategy for the low-voltage storage battery is not the same under different vehicle operating conditions. For example, the vehicle load is divided into multiple parts, and the output power of the DCDC is determined according to the opening of the vehicle-mounted electrical appliances by means of parallel or series connection with the DCDC module or the low-voltage storage battery, so as to supply power to the low-voltage part of the vehicle. The disadvantage of this method is that the vehicle wiring harness needs to be modified to form a series connection or a parallel connection between components. Moreover, the wiring harness further reduces the circuit voltage drop. SUMMARY

[0003] Therefore, the present application provides a method for determining charging voltage of a low-voltage storage battery of a vehicle and related equipment, which can determine the charging voltage of the low-voltage storage battery based on the specific state of the vehicle, thereby reducing the energy consumption of the vehicle and increasing the driving experience of the user.

[0004] In a first aspect, embodiments of the present application provide a method for determining charging voltage of a low-voltage storage battery of a vehicle, comprising:

[0005] obtaining a remaining power of a power battery, a remaining power of a low-voltage storage battery, and an ambient temperature;

[0006] if the remaining power of the low-voltage storage battery is not obtained, determining the charging voltage of the low-voltage storage battery according to the ambient temperature;

[0007] if the remaining power of the low-voltage storage battery is obtained, determining the charging voltage of the low-voltage storage battery based on the remaining power of the power battery, the remaining power of the low-voltage storage battery, and the ambient temperature.

[0008] In a possible implementation, the determining the charging voltage of the low-voltage storage battery according to the ambient temperature comprises:

[0009] if the ambient temperature is less than a first threshold value, determining a first preset voltage as the charging voltage of the low-voltage storage battery;

[0010] if the ambient temperature is greater than a second threshold value, determining a second preset voltage as the charging voltage of the low-voltage storage battery; wherein the second threshold value is greater than the first threshold value;

[0011] if the ambient temperature is greater than or equal to the first threshold value and the ambient temperature is less than or equal to the second threshold value, a third preset voltage is determined as the charging voltage of the low-voltage storage battery;

[0012] wherein the first preset voltage is greater than the third preset voltage, and the third preset voltage is greater than the second preset voltage.

[0013] In a possible implementation, the determining of the charging voltage of the low-voltage storage battery based on the remaining power of the power battery, the remaining power of the low-voltage storage battery, and the ambient temperature comprises:

[0014] determining whether the remaining power of the power battery is less than or equal to a third threshold value;

[0015] if the remaining power of the power battery is less than or equal to the third threshold value, determining a first candidate voltage value according to the remaining power of the low-voltage storage battery and the ambient temperature;

[0016] determining the charging voltage of the low-voltage storage battery based on the first candidate voltage value.

[0017] In a possible implementation, if the remaining power of the power battery is greater than the third threshold value, the method comprises:

[0018] obtaining state information of an energy recovery function;

[0019] if the state information of the energy recovery function is in an open state, determining a first preset voltage as the first candidate voltage value; if the state information of the energy recovery function is in a closed state, determining the first candidate voltage value according to the remaining power of the low-voltage storage battery and the ambient temperature;

[0020] determining the charging voltage of the low-voltage storage battery based on the first candidate voltage value.

[0021] In a possible implementation, the determining of the charging voltage of the low-voltage storage battery based on the first candidate voltage value comprises:

[0022] obtaining an output voltage of a low-voltage direct-current converter;

[0023] determining whether the output voltage of the low-voltage direct-current converter is less than a fourth threshold value;

[0024] if the output voltage of the low-voltage direct-current converter is less than the fourth threshold value, determining a compensation value of the first candidate voltage value based on a resistance value of a longest line from the low-voltage direct-current converter to a load; wherein if the output voltage of the low-voltage direct-current converter is greater than or equal to the fourth threshold value, the compensation value is 0;

[0025] compensate the first candidate voltage value based on the compensation value;

[0026] determine the charging voltage of the low-voltage storage battery based on the compensated first candidate voltage value.

[0027] In a possible implementation, the determining the charging voltage of the low-voltage storage battery based on the compensated first candidate voltage value includes:

[0028] taking a minimum value of the compensated first candidate voltage value and the first preset voltage to obtain a second candidate voltage value;

[0029] determine the charging voltage of the low-voltage storage battery based on the second candidate voltage value.

[0030] In a possible implementation, the determining the charging voltage of the low-voltage storage battery based on the second candidate voltage value includes:

[0031] obtaining an operating state of an engine; the operating state of the engine includes started or not started;

[0032] determining a third candidate voltage value according to the operating state of the engine;

[0033] taking a maximum value of the second candidate voltage value and the third candidate voltage value to obtain the charging voltage of the low-voltage storage battery.

[0034] In a second aspect, an embodiment of the present application provides a vehicle low-voltage storage battery charging voltage determination device, including:

[0035] an obtaining module configured to obtain a remaining power of a power battery, a remaining power of a low-voltage storage battery, and an ambient temperature;

[0036] a processing module configured to determine a charging voltage of the low-voltage storage battery according to the ambient temperature when the obtaining module does not obtain the remaining power of the low-voltage storage battery;

[0037] the processing module is further configured to determine the charging voltage of the low-voltage storage battery based on the remaining power of the power battery, the remaining power of the low-voltage storage battery, and the ambient temperature when the remaining power of the low-voltage storage battery is obtained.

[0038] In a third aspect, an embodiment of the present application provides an electronic device, including:

[0039] at least one processor; and

[0040] at least one memory connected with the processor, wherein:

[0041] The memory stores program instructions executable by the processor, and the processor invoking the program instructions can execute the method of the first aspect.

[0042] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, which stores computer instructions, and the computer instructions make the computer execute the method of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0044] Figure 1 A flow chart of a vehicle low-voltage storage battery charging voltage determination method provided by an embodiment of the present application is shown in the figure.

[0045] Figure 2 A structural schematic diagram of a vehicle low-voltage storage battery charging voltage determination device provided by an embodiment of the present application is shown in the figure.

[0046] Figure 3 A structural schematic diagram of an electronic device provided by an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0047] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the drawings.

[0048] It should be clear that the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0049] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0050] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0051] In order to reduce the energy consumption of the whole vehicle, the embodiment of the present application provides a vehicle low-voltage storage battery charging voltage determination method and related equipment, which determines the charging voltage of the low-voltage storage battery based on the actual state of the vehicle. Figure 1 A flow chart of a vehicle low-voltage storage battery charging voltage determination method provided by the embodiment of the present application is shown in FIG. 1. As shown in FIG. 1, the method comprises the following steps. Figure 1

[0052] In step 101, the residual capacity of the power battery, the residual capacity of the low-voltage storage battery and the ambient temperature are obtained.

[0053] The vehicle control unit (VCU) can make the vehicle enter the high-voltage power-on state through the high-voltage power-on process. When the vehicle enters the high-voltage power-on state, the residual capacity of the power battery can be obtained. The ambient temperature can be obtained through the corresponding temperature sensor. The residual capacity of the low-voltage storage battery can be obtained through the intelligent battery sensor (IBS). If the residual capacity of the low-voltage storage battery cannot be obtained, step 102 is performed. If the residual capacity of the low-voltage storage battery is obtained, step 103 is performed.

[0054] In step 102, the charging voltage of the low-voltage storage battery is determined according to the ambient temperature.

[0055] For the scenario where the IBS fails to obtain the residual capacity of the low-voltage storage battery and the scenario where the vehicle is not equipped with the IBS and thus cannot obtain the residual capacity of the low-voltage storage battery, the charging voltage of the low-voltage storage battery can be determined according to the ambient temperature. When the ambient temperature is low, the normal working voltage of each load device under the low-voltage system needs to be increased additionally. Therefore, the lower the ambient temperature, the higher the charging voltage of the low-voltage storage battery. The higher the ambient temperature, the lower the charging voltage of the low-voltage storage battery. Specifically, the correlation between different ambient temperatures and different charging voltages can be established in advance, and then the corresponding charging voltage can be determined according to the obtained ambient temperature.

[0056] In some embodiments, in order to reduce the processing pressure of calculating the charging voltage of the low-voltage storage battery according to the ambient temperature, a threshold value can be set for the ambient temperature to determine the charging voltage of the low-voltage storage battery. Specifically, when the ambient temperature is less than a first threshold value, a first preset voltage is determined as the charging voltage of the low-voltage storage battery. The first preset voltage is the maximum value of the charging voltage of the low-voltage storage battery.

[0057] ​If the ambient temperature is greater than the second threshold value, the second preset voltage is determined as the charging voltage of the low-voltage storage battery. The second threshold value is greater than the first threshold value. The second preset voltage is the minimum value of the charging voltage of the low-voltage storage battery.

[0058] If the ambient temperature is greater than or equal to the first threshold value and less than or equal to the second threshold value, the third preset voltage is determined as the charging voltage of the low-voltage storage battery. The first preset voltage is greater than the third preset voltage, and the third preset voltage is greater than the second preset voltage.

[0059] For example, the first threshold value is 10℃, and the second threshold value is 25℃. The first preset voltage is 14.5V, the second preset voltage is 14V, and the third preset voltage is 14.3V. When the ambient temperature is less than 10℃, the charging voltage is the first preset voltage 14.5V. When the ambient temperature is greater than or equal to 10℃ and less than or equal to 25℃, the charging voltage is the third preset voltage 14.3V. When the ambient temperature is greater than 25℃, the charging voltage is the second preset voltage 14V.

[0060] In step 103, the charging voltage of the low-voltage storage battery is determined based on the remaining power of the power battery, the remaining power of the low-voltage storage battery, and the ambient temperature.

[0061] When the vehicle is equipped with the IBS and the IBS is not faulty, the remaining power of the low-voltage storage battery can be obtained through the IBS. Therefore, it can be first determined whether the remaining power of the power battery is less than or equal to the third threshold value. If the remaining power of the power battery is less than or equal to the third threshold value, a first candidate voltage value is determined according to the remaining power of the low-voltage storage battery and the ambient temperature through a table lookup. Then, the charging voltage of the low-voltage storage battery is determined based on the first candidate voltage value. Table 1-1 is a first candidate voltage value corresponding table provided by an embodiment of the present application. As shown in Table 1-1, the first candidate voltage value corresponding to different ambient temperatures and different remaining powers of the low-voltage storage battery is different. Based on Table 1-1 and the obtained ambient temperature and the remaining power of the low-voltage storage battery, the corresponding first candidate voltage value can be obtained.

[0062] For example, the third threshold value is 90%, the current ambient temperature is 0℃, and the remaining power of the low-voltage storage battery is 60%. When the remaining power of the power battery is less than or equal to 90%, the first candidate voltage value is 14.5V through Table 1-1, so the first candidate voltage value 14.5V can be used as the charging voltage of the low-voltage storage battery.

[0063] In some embodiments, when the remaining power of the power battery is greater than the third threshold, the charging voltage of the low-voltage storage battery needs to be determined according to the state of the energy recovery function. Specifically, the state information of the energy recovery function is first obtained. The energy recovery function converts the energy generated by the vehicle during braking, downhill or coasting into electrical energy and stores it, thereby improving the overall energy utilization efficiency and prolonging the cruising range of the electric vehicle. When the remaining power of the power battery is high, the recovery efficiency of the energy recovery function is weak. When the state information of the energy recovery function is in an open state, the first preset voltage can be determined as the first candidate voltage value. If the state information of the energy recovery function is in a closed state, the above-mentioned table lookup method is adopted to determine the first candidate voltage value according to the remaining power of the low-voltage storage battery and the environmental temperature. Finally, the charging voltage of the low-voltage storage battery is determined based on the obtained first candidate voltage value.

[0064] In some embodiments, the influence of the circuit voltage drop on the circuit of the whole vehicle low-voltage loop also needs to be considered. Since the low-voltage storage battery is powered by a low-voltage direct current converter (i.e. a DCDC module), the output voltage of the low-voltage direct current converter is first obtained. Then it is judged whether the output voltage of the low-voltage direct current converter is less than a fourth threshold. If the output voltage of the low-voltage direct current converter is less than the fourth threshold, it means that the output voltage of the low-voltage direct current converter is low, and the influence of the circuit voltage drop on the charging of the low-voltage storage battery needs to be considered. Therefore, the compensation value of the first candidate voltage value is determined based on the resistance value of the longest line of the low-voltage direct current converter to the electrical device. The longest line refers to the line between the electrical device farthest from the low-voltage direct current converter and the low-voltage direct current converter that is currently working in the low-voltage loop.

[0065] The compensation value is the circuit voltage drop, which can be obtained by the current value output by the low-voltage direct current converter and the resistance value of the longest line. In some embodiments, if the output voltage of the low-voltage direct current converter is greater than or equal to the fourth threshold, the influence of the circuit voltage drop does not need to be considered, and the compensation value is 0.

[0066] Then, the first candidate voltage value is compensated based on the compensation value, and the charging voltage of the low-voltage storage battery is determined based on the compensated first candidate voltage value. Optionally, the first candidate voltage value and the first preset voltage can be compared, and the minimum value of the two is taken as the second candidate voltage value, and finally the charging voltage of the low-voltage storage battery is determined based on the second candidate voltage value. This operation can avoid that the compensated first preset voltage is greater than the maximum charging voltage of the low-voltage storage battery (i.e. the first preset voltage), thereby protecting the charging of the low-voltage storage battery and increasing the service life of the low-voltage storage battery.

[0067] In some embodiments, when determining the charging voltage of the low-voltage storage battery, the working state of the engine also needs to be considered. Specifically, the working state of the engine can be acquired through a vehicle bus (CAN bus or K bus) first. The working state of the engine includes started or not started. Then, a third candidate voltage value is determined according to the working state of the engine. When the working state of the engine is started, the third candidate voltage value is the minimum working voltage of the engine. When the working state of the engine is not started, the third candidate voltage value is the minimum charging voltage. Then, the maximum of the second candidate voltage value and the third candidate voltage value is taken to obtain the charging voltage of the low-voltage storage battery.

[0068] In the embodiments of the present application, the failure and normal working condition of the IBS are considered, the vehicle model without IBS can be directly covered, and the strategy is platformized. Both the high SOC recovery of the power battery and the engine starting condition are considered, and the normal work of each part of the engine is ensured. The voltage compensation is used to ensure that the vehicle will not be affected by the large voltage drop of the large current work to affect the normal work of the remote electrical appliances.

[0069] Corresponding to the above-mentioned vehicle low-voltage storage battery charging voltage determination method, the embodiments of the present application provide a vehicle low-voltage storage battery charging voltage determination device. Figure 2 A structural diagram of a vehicle low-voltage storage battery charging voltage determination device provided by the embodiments of the present application is shown in FIG. 1. Figure 2 As shown in FIG. 1, the device includes an acquisition module 201 and a processing module 202.

[0070] The acquisition module 201 is configured to acquire the remaining power of the power battery, the remaining power of the low-voltage storage battery, and the environmental temperature.

[0071] The processing module 202 is configured to determine the charging voltage of the low-voltage storage battery according to the environmental temperature when the acquisition module does not acquire the remaining power of the low-voltage storage battery.

[0072] The processing module 202 is further configured to determine the charging voltage of the low-voltage storage battery based on the remaining power of the power battery, the remaining power of the low-voltage storage battery, and the environmental temperature when the remaining power of the low-voltage storage battery is acquired.

[0073] Figure 2 The vehicle low-voltage storage battery charging voltage determination device provided by the embodiments shown in FIG. 1 can be used to execute the technical solutions of the method embodiments shown in FIG. 2. Figure 1 The implementation principles and technical effects of the device embodiments shown in FIG. 1 can be further referred to the related descriptions in the method embodiments.

[0074] Figure 3 A structural diagram of an electronic device provided by the embodiments of the present application is shown in FIG. 1. Figure 3As shown, the electronic device can include at least one processor, and at least one memory connected with the processor in communication, wherein: the memory stores program instructions executable by the processor, and the processor calling the program instructions can execute the embodiments of the present specification Figure 1 The embodiment shown provides a vehicle low-voltage storage battery charging voltage determination method.

[0075] As shown Figure 3 The electronic device is shown in the form of a general-purpose computing device. Components of the electronic device can include, but are not limited to, one or more processors 310, a communication interface 320, and a memory 330, a communication bus 340 connecting different system components (including the memory 330, the communication interface 320, and the processor 310).

[0076] The communication bus 340 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor or local bus using any of a variety of bus architectures. For example, these architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MAC) bus, Enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.

[0077] The electronic device typically includes a variety of computer system readable media. These media can be any available media that is accessible by the electronic device and includes both volatile and non-volatile media, removable and non-removable media.

[0078] The memory 330 can include computer system readable media in the form of volatile memory, such as random access memory (RAM) and / or cache memory. The electronic device can further include other removable / non-removable, volatile / non-volatile computer system storage media. The memory 330 can include at least one program product having a set (for example, at least one) of program modules configured to perform the functions of the embodiments of the present specification.

[0079] Program / utility 335, having a set of program modules 335A, can be stored in memory 330 by way of example, and not limitation, as well as an operating system, one or more application programs, other program modules, and program data. Each of the operating system, one or more application programs, other program modules, and program data or some combination thereof, can include an implementation of a networking environment. Program modules 335A generally carry out the functions and / or methodologies of embodiments of the description.

[0080] Processor 310 executes the program modules stored in memory 330 as various program core functions and data processing, such as implementing the embodiments of the description described in the specification. Figure 1 The vehicle low-voltage storage battery charging voltage determination method provided by the embodiments shown.

[0081] The embodiments of the present specification provide a computer program product, which comprises a computer program, when the computer program is executed by a processor, the computer program implements the execution of the embodiments of the present specification Figure 1 The vehicle low-voltage storage battery charging voltage determination method provided by the embodiments shown.

[0082] The embodiments of the present specification provide a computer readable storage medium, which stores computer instructions, the computer instructions make the computer execute the embodiments of the present specification Figure 1 The vehicle low-voltage storage battery charging voltage determination method provided by the embodiments shown.

[0083] The computer readable storage medium described above can adopt any combination of one or more computer readable media. The computer readable medium can be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium may, for example, be but is not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination of the above. More specific examples (non-exhaustive list) of the computer readable storage medium include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM) or a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device or apparatus.

[0084] The above described embodiments of the present specification have been described. Other embodiments are within the scope of the following claims. In some cases, the acts or steps recited in the claims can be performed in a different order than those described in the embodiments, and still achieve desirable results. Also, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order, to achieve the desired results. In certain implementations, multitasking and parallel processing can be advantageous.

[0085] In the description of the present specification, the description using the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present specification. The illustrative appearance of the above terms in various places in the present specification is not necessarily intended to refer to the same embodiment or example. Also, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the different embodiments or examples described in the present specification and the features of the different embodiments or examples can be combined and combined, if not mutually contradictory, by those skilled in the art.

[0086] In addition, the terms "first", "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present specification, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0087] Any process or method descriptions or descriptions of processes or methods described in flow diagrams or otherwise herein can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for implementing specific logic functions (or steps) or portions of a larger function or step, and alternate implementations are possible. The preferred implementations of the present specification are not limited to the order of the steps or the order in which the steps are executed, as described in the embodiments, and the order of the steps can be changed, including according to the functionality involved, the order of the steps can be performed in an order different from that shown or discussed, including substantially concurrently or in reverse order, as will be understood by those skilled in the art.

[0088] Depending on the context, the word "if' as used herein can be interpreted to mean "when" or "when a" or "in response to determining" or "in response to detecting". Similarly, the phrase "if determined" or "if detecting (a stated condition or event)" can be interpreted to mean "when determined" or "in response to determining" or "when detecting (a stated condition or event)" or "in response to detecting (a stated condition or event)", depending on the context.

[0089] It should be noted that the devices involved in the embodiments of the present specification can include, but are not limited to, a personal computer (PC), a personal digital assistant (PDA), a wireless handheld device, a tablet computer, a mobile phone, an MP3 display, an MP4 display, and the like.

[0090] In several embodiments provided in the present specification, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, another division mode can be adopted. For example, a plurality of units or components can be combined or integrated into another system, or some features can be omitted or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0091] In addition, each functional unit in each embodiment of the present specification can be integrated into one processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of hardware plus software functional units.

[0092] The integrated unit realized in the form of software functional units can be stored in a computer readable storage medium. The software functional units stored in the storage medium include a plurality of instructions for causing a computer device (which can be a personal computer, a connector, or a network device, etc.) or a processor to execute part of the steps of the method described in each embodiment of the present specification. The aforementioned storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0093] The above description is only the preferred embodiment of the present specification and is not intended to limit the present specification. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present specification shall be included in the scope of protection of the present specification.

[0094] The same or similar parts between various embodiments in the specification can be referred to each other. Especially, for the device embodiments and the terminal embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the description in the method embodiments.

Claims

1. A method for determining the charging voltage of a vehicle low-voltage battery, characterized in that, include: Obtain the remaining power of the power battery, the remaining power of the low-voltage battery, and the ambient temperature; If the remaining power of the low-voltage battery is not obtained, the charging voltage of the low-voltage battery is determined based on the ambient temperature. If the remaining power of the low-voltage battery is obtained, the charging voltage of the low-voltage battery is determined based on the remaining power of the power battery, the remaining power of the low-voltage battery, and the ambient temperature. Determine whether the remaining charge of the power battery is greater than a third threshold. If the remaining charge of the power battery is greater than the third threshold, the method further includes: Obtain the status information of the energy recovery function; If the energy recovery function is in the off state, the first candidate voltage value is determined based on the remaining charge of the low-voltage battery and the ambient temperature. Obtain the output voltage of the low-voltage DC-DC converter; Determine whether the output voltage of the low-voltage DC-DC converter is less than the fourth threshold. If the output voltage of the low-voltage DC converter is less than the fourth threshold, a compensation value for the first candidate voltage value is determined based on the resistance value of the longest line from the low-voltage DC converter to the appliance; wherein, if the output voltage of the low-voltage DC converter is greater than or equal to the fourth threshold, the compensation value is 0. The first candidate voltage value is compensated based on the compensation value; The charging voltage of the low-voltage battery is determined based on the compensated first candidate voltage value.

2. The method according to claim 1, characterized in that, Determining the charging voltage of the low-voltage battery based on the ambient temperature includes: If the ambient temperature is less than the first threshold, then the first preset voltage is determined as the charging voltage of the low-voltage battery. If the ambient temperature is greater than the second threshold, then the second preset voltage is determined as the charging voltage of the low-voltage battery; wherein the second threshold is greater than the first threshold; If the ambient temperature is greater than or equal to the first threshold and the ambient temperature is less than or equal to the second threshold, then the third preset voltage is determined as the charging voltage of the low-voltage battery. Wherein, the first preset voltage is greater than the third preset voltage, and the third preset voltage is greater than the second preset voltage.

3. The method according to claim 1, characterized in that, Determining the charging voltage of the low-voltage battery based on the remaining charge of the power battery, the remaining charge of the low-voltage battery, and the ambient temperature includes: Determine whether the remaining charge of the power battery is less than or equal to a third threshold. If the remaining power of the power battery is less than or equal to the third threshold, then a first candidate voltage value is determined based on the remaining power of the low-voltage battery and the ambient temperature. The charging voltage of the low-voltage battery is determined based on the first candidate voltage value.

4. The method according to claim 3, characterized in that, If the status information of the energy recovery function is in the "on" state, then the first preset voltage is determined as the first candidate voltage value; The charging voltage of the low-voltage battery is determined based on the first candidate voltage value.

5. The method according to claim 4, characterized in that, Determining the charging voltage of the low-voltage battery based on the compensated first candidate voltage value includes: The minimum value between the compensated first candidate voltage value and the first preset voltage is used to obtain the second candidate voltage value; The charging voltage of the low-voltage battery is determined based on the second candidate voltage value.

6. The method according to claim 5, characterized in that, Determining the charging voltage of the low-voltage battery based on the second candidate voltage value includes: The engine's operating status is obtained; the engine's operating status includes whether it is started or not. The third candidate voltage value is determined based on the engine's operating state; The maximum value between the second candidate voltage value and the third candidate voltage value is taken to obtain the charging voltage of the low-voltage battery.

7. A device for determining the charging voltage of a vehicle low-voltage battery, characterized in that, include: The acquisition module is used to acquire the remaining power of the power battery, the remaining power of the low-voltage battery, and the ambient temperature. The processing module is used to determine the charging voltage of the low-voltage battery based on the ambient temperature when the acquisition module fails to acquire the remaining power of the low-voltage battery. The processing module is further configured to determine the charging voltage of the low-voltage battery based on the remaining power of the power battery, the remaining power of the low-voltage battery, and the ambient temperature when the remaining power of the low-voltage battery is obtained. Determine whether the remaining charge of the power battery is greater than a third threshold. If the remaining charge of the power battery is greater than the third threshold, the acquisition module is further configured to: Acquire the status information of the energy recovery function and the output voltage of the low-voltage DC-DC converter; The processing module is also used for: When the energy recovery function is in the off state, a first candidate voltage value is determined based on the remaining charge of the low-voltage battery and the ambient temperature. Determine whether the output voltage of the low-voltage DC-DC converter is less than the fourth threshold. If the output voltage of the low-voltage DC converter is less than the fourth threshold, a compensation value for the first candidate voltage value is determined based on the resistance value of the longest line from the low-voltage DC converter to the appliance; wherein, if the output voltage of the low-voltage DC converter is greater than or equal to the fourth threshold, the compensation value is 0. The first candidate voltage value is compensated based on the compensation value; The charging voltage of the low-voltage battery is determined based on the compensated first candidate voltage value.

8. An electronic device, characterized in that, include: At least one processor; as well as At least one memory communicatively connected to the processor, wherein: The memory stores program instructions that can be executed by the processor, and the processor can invoke the program instructions to perform the method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions that cause the computer to perform the method as claimed in any one of claims 1 to 6.

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