CN114750643B - Automobile low-voltage battery charging method and system and automobile - Google Patents
Automobile low-voltage battery charging method and system and automobile Download PDFInfo
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- CN114750643B CN114750643B CN202110740471.6A CN202110740471A CN114750643B CN 114750643 B CN114750643 B CN 114750643B CN 202110740471 A CN202110740471 A CN 202110740471A CN 114750643 B CN114750643 B CN 114750643B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/13—Maintaining the SoC within a determined range
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses an automobile battery charging method, an automobile battery charging system and an automobile, wherein the method is implemented by detecting the current power mode of the automobile; when the current power supply mode is a whole-vehicle standby mode or a whole-vehicle sleep mode, if an automobile regional network associated with a battery management system of an automobile is in a sleep state, controlling a high-voltage battery of the automobile to charge the battery, and recording a first accumulated charging time; detecting a first charging current for charging the battery after the first accumulated charging time is greater than a first preset time threshold; and when the first charging current is smaller than or equal to a first preset current threshold value and the first accumulated charging time is smaller than a second preset time threshold value, controlling the high-voltage battery to stop charging the low-voltage battery. The invention improves the accuracy of the low-voltage battery power shortage detection and reduces the risk of the low-voltage battery power shortage phenomenon.
Description
Technical Field
The invention relates to the technical field of automobile battery charging management, in particular to an automobile battery charging method and system and an automobile.
Background
With the development of the automobile industry, more and more low-voltage electric equipment are arranged on an automobile, and more users use the low-voltage electric equipment, so that the electric power deficiency risk of an automobile battery can be caused under the condition that the low-voltage electric equipment is used too much.
In the prior art, in order to solve the problem of power shortage of the low-voltage battery of an automobile, a management module is often added on the low-voltage battery, and the management module manages a battery power supply by detecting the electric quantity of the low-voltage battery so as to perform power supplementing treatment on the low-voltage battery when the power shortage phenomenon of the low-voltage battery is detected. However, the management module has a larger detection error, which results in lower accuracy of the low-voltage battery power shortage detection, and thus the low-voltage battery power shortage risk cannot be avoided.
Disclosure of Invention
The embodiment of the invention provides an automobile battery charging method and system and an automobile, and aims to solve the problem that in the prior art, the accuracy of low-voltage battery power shortage detection by a management module is low.
A method of charging a battery of an automobile, comprising:
detecting a current power mode of an automobile;
when the current power supply mode is a whole-vehicle standby mode or a whole-vehicle sleep mode, if an automobile regional network associated with a battery management system of an automobile is in a sleep state, controlling a high-voltage battery of the automobile to charge the battery, and recording a first accumulated charging time;
detecting a first charging current for charging the battery after the first accumulated charging time is greater than a first preset time threshold;
when the first charging current is smaller than or equal to a first preset current threshold and the first accumulated charging time is smaller than a second preset time threshold, controlling the high-voltage battery to stop charging the low-voltage battery; the first preset time threshold is smaller than the second preset time threshold.
The automobile battery charging system comprises a processor connected with a battery management system of an automobile, wherein the processor is used for executing the automobile battery charging method; the battery management system is connected with a high-voltage battery and a low-voltage battery of the automobile.
An automobile comprises the automobile battery charging system.
According to the automobile low-voltage battery charging method, the automobile low-voltage battery charging system and the automobile, when the automobile network is switched from a working state (such as a whole automobile standby mode and other current power modes except a whole automobile dormant mode) to a dormant state (such as a whole automobile standby mode or a whole automobile dormant mode, and the automobile regional network is in the dormant state), the low-voltage battery is charged and protected by setting the strategy of charging the high-voltage battery, so that the high-voltage battery charges the low-voltage battery in the dormant state, and the low-voltage battery has the capacity of providing sufficient electric quantity when low-voltage electric equipment of the next automobile is switched to the working state, the accuracy of electric shortage detection of the low-voltage battery is improved, and the risk of electric shortage of the low-voltage battery is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for charging a vehicle battery according to an embodiment of the invention;
fig. 2 is a schematic view of an application environment of a method for charging a vehicle battery according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In one embodiment, as shown in fig. 1, a method for charging a battery of an automobile is provided, and the method is applied to a domain controller module shown in fig. 2, and includes the following steps:
s10: detecting a current power mode of an automobile;
it can be appreciated that the vehicle in this embodiment may be a pure electric vehicle, a hybrid vehicle, a pure fuel vehicle, or the like. The current power supply mode refers to a whole vehicle power supply mode of the automobile, and is used for indicating the current working mode of each electrical system on the automobile, and the current power supply mode comprises, but is not limited to, a whole vehicle sleep mode, a whole vehicle standby mode, an in-vehicle living mode, a to-be-driven mode or a driving mode and the like. In this embodiment, the current power mode of the automobile may be detected in real time, or may be detected at regular time.
S20: when the current power supply mode is a whole-vehicle standby mode or a whole-vehicle sleep mode, if an automobile regional network associated with a battery management system of an automobile is in a sleep state, controlling a high-voltage battery of the automobile to charge the battery, and recording a first accumulated charging time;
as can be appreciated, when the current power mode of the automobile is the whole-automobile standby mode and the whole-automobile sleep mode, if the current power mode is the whole-automobile standby mode, each electrical system in the automobile enters an executable standby mode at this time, and the automobile network may be in a working mode; if the current power mode is the whole vehicle sleep mode, all electric appliance systems in the vehicle enter a sleep state or a working state with the lowest power consumption at the moment, and the vehicle network is in the sleep state.
Further, when the current power mode is determined to be the whole-vehicle standby mode or the whole-vehicle sleep mode, whether the vehicle area network associated with the battery management system of the vehicle is in the sleep state or not can be determined. The battery management system is used for detecting charging current output by the high-voltage battery to the low-voltage battery; the automotive area network comprises all network nodes in the automotive network connected to the battery management system. The sleep state refers to all network node devices connected to the battery management system being in a sleep state.
Further, when the current power supply mode is determined to be the standby mode of the whole vehicle or the sleep mode of the whole vehicle, if the vehicle regional network associated with the battery management system of the vehicle is in the sleep state, the vehicle regional network is represented to switch from the working state to the sleep state, at this time, the low-voltage battery supplies power to the low-voltage equipment in the vehicle for a period of time, which may result in lower electric quantity of the low-voltage battery.
Further, if the automobile regional network is not in a dormant state, the high-voltage battery of the automobile is not required to be controlled to charge the low-voltage battery temporarily until the automobile regional network is in the dormant state, the high-voltage battery is controlled to charge the low-voltage battery, and the first accumulated charging time is recorded.
S30: detecting a first charging current for charging the battery after the first accumulated charging time is greater than a first preset time threshold;
alternatively, the first preset time threshold may be selected according to the capacity of the low-voltage battery of the automobile, and the first preset time threshold may be set to 10 minutes, for example. Further, after the high-voltage battery of the automobile is controlled to charge the battery and the first accumulated charging time is recorded, the first accumulated charging time is compared with a first preset time threshold, and after the first accumulated charging time is greater than the first preset time threshold, the first charging current of the high-voltage battery for charging the battery can be detected in real time or detected at fixed time. The battery management system can detect the charging current output by the high-voltage battery, namely the first charging current.
S40: when the first charging current is smaller than or equal to a first preset current threshold and the first accumulated charging time is smaller than a second preset time threshold, controlling the high-voltage battery to stop charging the low-voltage battery; the first preset time threshold is smaller than the second preset time threshold.
Alternatively, the first preset current threshold and the second preset time threshold may be selected according to the capacitance of the low-voltage battery of the automobile, and the second preset time threshold may be set to 30 minutes, for example; the first preset current threshold may be set to 200mA. Further, after the first accumulated charging time is greater than the first preset time threshold, the charging accumulated time is greater than the historical experience value, that is, the low-voltage battery may reach 80% and 90% after the first preset time threshold is passed through the pre-experiment, so that whether the capacitance of the low-voltage battery reaches the requirement of starting the low-voltage equipment next time can be determined by detecting the first charging current; when the first charging current is smaller than or equal to a first preset current threshold, the electric capacity of the low-voltage battery possibly reaches 80% and 90%, the electric capacity can meet the requirement when the low-voltage equipment is started next time, and at the moment, the first accumulated charging time is smaller than a second preset time threshold, the high-voltage battery is controlled to stop charging the high-voltage battery, and the first accumulated charging time in the timer is cleared.
In this embodiment, when the automobile network is switched from a working state (such as a standby mode of the whole automobile and a current power supply mode other than a sleep mode of the whole automobile) to a sleep state (such as the standby mode of the whole automobile or the sleep mode of the whole automobile, the automobile regional network is in the sleep state of the whole automobile), the strategy of charging and protecting the low-voltage battery by setting the high-voltage battery is used for charging the low-voltage battery in the sleep state, so that when the low-voltage electric equipment of the next automobile is switched to the working state, the low-voltage battery has the capability of providing sufficient electric quantity, the accuracy of the low-voltage battery power shortage detection is improved, and the risk of the low-voltage battery from generating a power shortage phenomenon is reduced.
In an embodiment, after step S30, that is, after the detecting the first charging current for charging the low-voltage battery, the method further includes:
and when the first accumulated charging time is greater than or equal to a second preset time threshold, controlling the high-voltage battery to stop charging the low-voltage battery.
It can be appreciated that when the first accumulated charging time is greater than or equal to the second preset time threshold, the high-voltage battery is controlled to stop charging the low-voltage battery no matter the first charging current is greater than the first preset current threshold or the first charging current is less than or equal to the first preset current threshold. When the first accumulated charging time for charging the low-voltage battery is greater than or equal to the second preset time threshold, the charging process of the high-voltage battery on the low-voltage battery is longer, the residual electric quantity of the low-voltage battery can not bring the power shortage risk when the low-voltage electric equipment is started next time, and after the automobile is in the whole-vehicle standby mode or the whole-vehicle sleep mode, the low-voltage battery can be charged through the high-voltage battery, so that the high-voltage battery can be directly controlled to stop charging the low-voltage battery, and the low-voltage battery can be prevented from being overcharged.
In an embodiment, after step S30, that is, after the detecting the first charging current for charging the low-voltage battery, the method further includes:
when the first charging current is larger than a first preset current threshold value and the first accumulated charging time is smaller than a second preset time threshold value, the high-voltage battery is controlled to continuously charge the low-voltage battery until the first charging current is smaller than or equal to the first preset current threshold value or the first accumulated charging time is larger than or equal to the second preset time threshold value, and the high-voltage battery is controlled to stop charging the low-voltage battery.
It may be appreciated that when the first charging current is greater than the first preset current threshold and the first accumulated charging time is between the first preset time threshold and the second preset time threshold, the remaining capacity of the low-voltage battery is still relatively small, such as 20%,30%, etc., so that the high-voltage battery is controlled to continue charging the low-voltage battery until the first charging current is less than or equal to the first preset current threshold or the first accumulated charging time is greater than or equal to the second preset time threshold, and the high-voltage battery is controlled to stop charging the low-voltage battery.
In an embodiment, after step S10, that is, after the detecting the current power mode of the automobile, the method further includes:
when the current power supply mode is not the whole-vehicle standby mode or the whole-vehicle sleep mode, determining whether a voltage detection module for detecting the voltage of the low-voltage battery is in an on state or not;
when the voltage detection module is in an on state, the voltage detection module is closed, and the high-voltage battery is controlled to charge the high-voltage battery;
it can be understood that when the current power supply mode is not the whole-vehicle standby mode or the whole-vehicle sleep mode, the current power supply mode may be an in-vehicle active mode, a to-be-driven mode or a driving mode, and at this time, the DCDC of the high-voltage battery of the automobile is in a working state, so that the high-voltage battery can be controlled to charge the low-voltage battery, and further whether the voltage detection module for detecting the voltage of the low-voltage battery is in an on state is determined; if the voltage detection module is in an on state, the voltage detection module can be turned off, and the high-voltage battery is controlled to charge the low-voltage battery, so that repeated starting of the voltage detection module is reduced, and energy is saved. The voltage detection module comprises an AD (Analog Data) detection port of an MCU (Microcontroller Unit, micro control unit) in the automobile.
Detecting a second charging current for charging the low-voltage battery;
and when the second charging current is smaller than or equal to the first preset current threshold value, controlling the high-voltage battery to stop charging the low-voltage battery.
Specifically, when the voltage detection module is in an on state, the voltage detection module is turned off, the high-voltage battery is controlled to charge the low-voltage battery, then a second charging current for charging the low-voltage battery can be detected in real time or detected at fixed time through a battery management system, the second charging current is compared with a first preset current threshold, and when the second charging current is smaller than or equal to the first preset current threshold, the high-voltage battery is controlled to stop charging the low-voltage battery; and when the second charging current is larger than the first preset current threshold value, controlling the high-voltage battery to continuously charge the low-voltage battery.
In an embodiment, after step S10, that is, after the detecting the current power mode of the automobile, the method further includes:
when the current power supply mode is a whole vehicle sleep mode, the high-voltage battery is controlled to charge the low-voltage battery;
it can be understood that when the current power mode is the whole vehicle sleep mode, at this time, the automobile network may be switched from the working state to the sleep state, at this time, the low-voltage battery may have powered on the low-voltage device in the automobile for a period of time, which may result in lower electric quantity of the low-voltage battery.
If the automobile area network is in an abnormal wake-up state, detecting a third charging current for charging the battery, and recording a second accumulated charging time;
it can be understood that the abnormal wake-up state refers to that the low-voltage electric equipment associated with part of nodes in the automobile regional network is not switched to the start-up state, and the low-voltage electric equipment associated with part of nodes is switched to the start-up state, so that the third charging current for charging the low-voltage battery can be detected in real time or detected at fixed time, and the second accumulated charging time is recorded.
When the third charging current is smaller than or equal to a second preset current threshold value or the second accumulated charging time is larger than or equal to the third preset time threshold value, controlling the high-voltage battery to stop charging the low-voltage battery; the third preset time threshold is less than the second preset time interval.
Specifically, after detecting the third charging current for charging the low-voltage battery and recording the second accumulated charging time, comparing the third charging current with a second preset current threshold value and comparing the second accumulated charging time with a third preset time threshold value, if the third charging current is smaller than or equal to the second preset current threshold value or the second accumulated charging time is larger than or equal to the third preset time threshold value, the current residual electric quantity of the low-voltage battery is higher (such as 80%,90% and the like), so that the low-voltage battery can provide sufficient electric energy when the low-voltage electric equipment is switched to a working state next time, and the phenomenon of power shortage does not occur immediately, thereby controlling the high-voltage battery to stop charging the low-voltage battery. The second preset current threshold may be selected according to the capacitance of the low-voltage battery of the automobile, and for example, the second preset current threshold may be set to 1A; the third preset time threshold may be set to be the same as the first preset time threshold or may be set to be different from the first preset time threshold, for example, the first preset time threshold and the third preset time threshold may each be set to be 10 minutes; the first preset time threshold may also be set to 10 minutes, while the third preset time threshold may be set to 15 minutes, etc.
In an embodiment, after controlling the high-voltage battery to stop charging the low-voltage battery when the third charging current is less than or equal to a second preset current threshold or the second accumulated charging time is greater than or equal to the third preset time threshold, the method further includes:
detecting a battery voltage of the low-voltage battery;
it can be appreciated that when the automotive regional network is in an abnormal wake-up state, the low-voltage electric equipment of a part of network nodes is switched to an operating state, so that after the high-voltage battery is charged (i.e. the third charging current is less than or equal to the second preset current threshold value, or the second accumulated charging time is greater than or equal to the third preset time threshold value) the low-voltage electric equipment switched to the operating state can be powered by the low-voltage battery, and at the moment, the residual electric quantity of the low-voltage battery is reduced, so that the battery voltage of the low-voltage battery needs to be detected to determine whether the low-voltage battery has a power shortage risk or not. Wherein, can be used for carrying on the voltage detection to the said low-voltage battery and detecting the battery voltage of the low-voltage battery through the voltage detection module used for carrying on the voltage detection.
When the battery voltage is smaller than or equal to a preset voltage threshold, controlling the high-voltage battery to charge the high-voltage battery;
specifically, after detecting the battery voltage of the low-voltage battery, comparing the battery voltage with a preset voltage threshold, and if the battery voltage is smaller than or equal to the preset voltage threshold, characterizing that the current residual electric quantity of the low-voltage battery is easy to be deficient, so that the high-voltage battery is controlled to charge the low-voltage battery. Wherein the preset voltage threshold may be set to 8V (for a low voltage battery of 12V).
Detecting a fourth charging current for charging the low-voltage battery, and simultaneously recording a third accumulated charging time;
when the fourth charging current is smaller than or equal to a first preset current threshold value or the third accumulated charging time is larger than or equal to a fourth preset time threshold value, controlling the high-voltage battery to stop charging the low-voltage battery; the fourth preset time threshold is greater than the third preset time threshold.
Specifically, when the battery voltage is smaller than or equal to a preset voltage threshold, after the high-voltage battery is controlled to charge the low-voltage battery, detecting fourth charging current for charging the low-voltage battery in real time or detecting fourth charging current for charging the low-voltage battery in a timing manner, and recording third accumulated charging time; comparing the fourth charging current with a first preset current threshold, and comparing the third accumulated charging time with a fourth preset time threshold, wherein when the fourth charging current is smaller than or equal to the first preset current threshold or the third accumulated charging time is larger than or equal to the fourth preset time threshold, the current residual electric quantity of the low-voltage battery is higher (such as 80%,90% and the like), and further the high-voltage battery can be controlled to stop charging the low-voltage battery so as to prevent the low-voltage battery from being overcharged.
In an embodiment, the detecting the fourth charging current for charging the battery, and after recording the third accumulated charging time, further includes:
and when the fourth charging current is larger than the first preset current threshold and the third accumulated charging time is smaller than the fourth preset time threshold, controlling the high-voltage battery to continuously charge the low-voltage battery until the fourth charging current is smaller than or equal to the first preset current threshold or the third accumulated charging time is larger than or equal to the fourth preset time threshold, and controlling the high-voltage battery to stop charging the low-voltage battery.
It may be appreciated that after detecting the fourth charging current for charging the low-voltage battery and recording the third accumulated charging time, if the fourth charging current is greater than the first preset current threshold and the third accumulated charging time is between the third preset time threshold and the fourth preset time threshold, the current residual capacity representing the low voltage is smaller (such as 20%,30%, etc.) and is at risk of power shortage, so that the high-voltage battery is controlled to continue charging the low-voltage battery until the fourth charging current is less than or equal to the first preset current threshold or the third accumulated charging time is greater than or equal to the fourth preset time threshold, and the high-voltage battery is controlled to stop charging the low-voltage battery.
In an embodiment, when the current power mode is the whole vehicle sleep mode, after controlling the high-voltage battery to charge the low-voltage battery, the method further includes:
if the automobile area network is in a normal wake-up state, detecting a fourth charging current for charging the low-voltage battery;
and when the fourth charging current is smaller than or equal to the first preset current threshold value, controlling the high-voltage battery to stop charging the low-voltage battery.
As can be understood, the normal wake-up state refers to that low-voltage electric equipment associated with each network node in the automobile area network is switched to an on state, and at this time, after the high-voltage battery is controlled to charge the low-voltage battery, a fourth charging current for charging the low-voltage battery is detected, and the fourth charging current is compared with a first preset current threshold; if the fourth charging current is smaller than or equal to the first preset current threshold, representing that the current residual capacity of the low-voltage battery is higher (such as 90%), and further controlling the high-voltage battery to stop charging the low-voltage battery so as to prevent overcharging of the low-voltage battery; if the fourth charging current is greater than the first preset current threshold, the present residual capacity of the low-voltage battery is lower (such as 30%), and the high-voltage battery is further controlled to continuously charge the low-voltage battery.
In this embodiment, when the automobile network is switched from the sleep state to the working state (such as the abnormal wake-up state or the wake-up state), the strategy of charging and protecting the low-voltage battery by setting the high-voltage battery is used for charging the high-voltage battery in the sleep state, so that the low-voltage battery has the capability of providing sufficient electric quantity when the automobile is switched from the sleep mode of the whole automobile to the power mode of other whole automobile, the accuracy of the low-voltage battery power shortage detection is improved, and the risk of the low-voltage battery power shortage phenomenon is reduced.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
In one embodiment, a low-voltage battery charging system for an automobile is provided, including a processor connected to a battery management system of the automobile, the processor being configured to perform the above-described method of charging the low-voltage battery of the automobile; the battery management system is connected with a high-voltage battery and a low-voltage battery of the automobile.
It can be understood that the processor provided in this embodiment may be a domain controller module shown in fig. 2, where the domain controller module is connected to the low-voltage battery and the high-voltage battery, so that the domain controller module may implement systematic management of the high-voltage battery and the low-voltage battery, and improve the efficiency of charging the low-voltage battery by the high-voltage battery. The battery management system can also be connected with the domain control module, so that the domain controller module can detect the charging current output by the high-voltage battery through the battery management system, and then control the whole process of charging the low-voltage battery by the high-voltage battery, so that the phenomenon of overcharging of the low-voltage battery is avoided when the safety of the low-voltage battery is protected (namely, the low-voltage battery is prevented from being in a low-voltage power shortage risk), the charging efficiency of the high-voltage battery for charging the low-voltage battery is improved, the high-voltage battery is prevented from being frequently opened or closed, and the service lives of the high-voltage battery and the low-voltage battery are prolonged.
Further, as shown in fig. 2, the vehicle low-voltage battery charging system may include at least one zone controller and a zone controller module for performing the above-mentioned vehicle low-voltage battery charging method; and the regional controllers are all in communication connection with the central domain controller.
Further, the domain controller module 1 may include a plurality of domain controllers communicatively connected to each other and a battery management system 15 communicatively connected to each other, such as the central domain controller 10, the first domain controller 11, and the second domain controller 12 in fig. 1 are three different domain controllers, and the central domain controller 10, the first domain controller 11, and the second domain controller 12 are communicatively connected to each other through ethernet. The domain controller module 1 is connected with the regional controller 13 through a CAN network.
Further, fig. 1 also includes an electronic control unit 14, where the electronic control unit 14 is communicatively connected to the domain controller module 1; further, the domain controller module 1 and the area controller 13 are all normally powered, and the electronic control unit 14 may be normally powered or controllably powered (for example, the output device must be controllably powered, such as a dipped headlight, etc.), and all power consumption of the normally powered modules is required to be within an acceptable range, only the power consumption of the whole vehicle is required to meet the requirement (for example, the current of the whole vehicle is less than 25 mA).
In one embodiment, an automobile is provided, including the above-described automobile battery charging system.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. A method for charging a battery of an automobile, comprising:
detecting a current power mode of an automobile;
when the current power supply mode is a whole-vehicle standby mode or a whole-vehicle sleep mode, if an automobile regional network associated with a battery management system of an automobile is in a sleep state, representing that the automobile regional network is switched from a working state to the sleep state, controlling a high-voltage battery of the automobile to charge the battery, and recording a first accumulated charging time;
if the automobile regional network is not in a dormant state, the high-voltage battery of the automobile is not required to be controlled to charge the low-voltage battery;
detecting a first charging current for charging the battery after the first accumulated charging time is greater than a first preset time threshold;
when the first charging current is smaller than or equal to a first preset current threshold and the first accumulated charging time is smaller than a second preset time threshold, controlling the high-voltage battery to stop charging the low-voltage battery; the first preset time threshold is smaller than the second preset time threshold.
2. The method for charging a battery of an automobile according to claim 1, wherein after detecting the first charging current for charging the battery, further comprising:
and when the first accumulated charging time is greater than or equal to a second preset time threshold, controlling the high-voltage battery to stop charging the low-voltage battery.
3. The method for charging a battery of an automobile according to claim 1, wherein after detecting the first charging current for charging the battery, further comprising:
when the first charging current is larger than a first preset current threshold value and the first accumulated charging time is smaller than a second preset time threshold value, the high-voltage battery is controlled to continuously charge the low-voltage battery until the first charging current is smaller than or equal to the first preset current threshold value or the first accumulated charging time is larger than or equal to the second preset time threshold value, and the high-voltage battery is controlled to stop charging the low-voltage battery.
4. The method for charging a battery of an automobile according to claim 1, further comprising, after detecting a current power mode of the automobile:
when the current power supply mode is not the whole-vehicle standby mode or the whole-vehicle sleep mode, determining whether a voltage detection module for detecting the voltage of the low-voltage battery is in an on state or not;
when the voltage detection module is in an on state, the voltage detection module is closed, and the high-voltage battery is controlled to charge the high-voltage battery;
detecting a second charging current for charging the low-voltage battery;
and when the second charging current is smaller than or equal to the first preset current threshold value, controlling the high-voltage battery to stop charging the low-voltage battery.
5. The method for charging a battery of an automobile according to any one of claims 1 to 4, further comprising, after detecting a current power mode of the automobile:
when the current power supply mode is a whole vehicle sleep mode, the high-voltage battery is controlled to charge the low-voltage battery;
if the automobile area network is in an abnormal wake-up state, detecting a third charging current for charging the battery, and recording a second accumulated charging time;
when the third charging current is smaller than or equal to a second preset current threshold value or the second accumulated charging time is larger than or equal to a third preset time threshold value, the high-voltage battery is controlled to stop charging the low-voltage battery; the third preset time threshold is less than the second preset time interval.
6. The method for charging a low-voltage battery of an automobile according to claim 5, wherein after the third charging current is less than or equal to a second preset current threshold value or the second accumulated charging time is greater than or equal to the third preset time threshold value, controlling the high-voltage battery to stop charging the low-voltage battery further comprises:
detecting a battery voltage of the low-voltage battery;
when the battery voltage is smaller than or equal to a preset voltage threshold, controlling the high-voltage battery to charge the high-voltage battery;
detecting a fourth charging current for charging the low-voltage battery, and simultaneously recording a third accumulated charging time;
when the fourth charging current is smaller than or equal to a first preset current threshold value or the third accumulated charging time is larger than or equal to a fourth preset time threshold value, controlling the high-voltage battery to stop charging the low-voltage battery; the fourth preset time threshold is greater than the third preset time threshold.
7. The method for charging a battery of an automobile according to claim 6, wherein detecting a fourth charging current for charging the low-voltage battery while recording a third accumulated charging time further comprises:
and when the fourth charging current is larger than the first preset current threshold and the third accumulated charging time is smaller than the fourth preset time threshold, controlling the high-voltage battery to continuously charge the low-voltage battery until the fourth charging current is smaller than or equal to the first preset current threshold or the third accumulated charging time is larger than or equal to the fourth preset time threshold, and controlling the high-voltage battery to stop charging the low-voltage battery.
8. The method for charging a low-voltage battery of an automobile according to claim 5, wherein when the current power mode is a vehicle sleep mode, the step of controlling the high-voltage battery to charge the low-voltage battery further comprises:
if the automobile area network is in a normal wake-up state, detecting a fourth charging current for charging the low-voltage battery;
and when the fourth charging current is smaller than or equal to the first preset current threshold value, controlling the high-voltage battery to stop charging the low-voltage battery.
9. A vehicle battery charging system comprising a processor coupled to a battery management system of a vehicle, the processor configured to perform the vehicle battery charging method of any one of claims 1 to 8; the battery management system is connected with a high-voltage battery and a low-voltage battery of the automobile.
10. An automobile comprising the automobile battery charging system according to claim 9.
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| US11394230B2 (en) * | 2018-01-29 | 2022-07-19 | Phillips & Temro Industries, Inc. | Systems and methods for auxiliary battery charging |
| CN111332154B (en) * | 2020-03-06 | 2021-11-26 | 江西江铃集团新能源汽车有限公司 | Automatic electric vehicle power supply control method and system |
| CN111762060A (en) * | 2020-06-30 | 2020-10-13 | 三一专用汽车有限责任公司 | Charging control method, vehicle, control device, and computer-readable storage medium |
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