CN111478383B - Battery energy management method and device, electronic equipment and storage medium - Google Patents
Battery energy management method and device, electronic equipment and storage medium Download PDFInfo
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- CN111478383B CN111478383B CN202010192635.1A CN202010192635A CN111478383B CN 111478383 B CN111478383 B CN 111478383B CN 202010192635 A CN202010192635 A CN 202010192635A CN 111478383 B CN111478383 B CN 111478383B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
Abstract
The invention discloses a battery energy management method, a device, electronic equipment and a storage medium, wherein the method comprises the following steps: acquiring the speed of the vehicle, the acceleration of the vehicle and the current charge of the battery; determining the current running condition of the vehicle according to the speed of the vehicle and the acceleration of the vehicle; determining the state of a battery according to the current running condition and/or the current charge; judging whether the state of the battery meets a first preset condition or not; if so, controlling the voltage converter to pre-charge the battery at a preset constant current; acquiring the voltage at two ends of the battery and the current temperature of the battery in the pre-charging process in real time; judging whether the voltage is greater than or equal to a preset first threshold value or not; if yes, controlling the voltage converter to charge the battery according to the current temperature; the invention charges or pre-charges the battery through the voltage converter according to the state of the battery; the reliability of the system and the service life of the power supply system of the whole vehicle are improved.
Description
Technical Field
The present invention relates to the field of vehicle battery charging technologies, and in particular, to a battery energy management method and apparatus, an electronic device, and a storage medium.
Background
With the development and publicity of intelligent driving systems, the increase of the expectation of users for the systems and the deepening of the electrification degree of the whole vehicle, more and more electric loads are gradually applied to a higher voltage platform, such as 48V, in order to improve the electric efficiency and realize miniaturization, and different 48V battery types correspond to different energy management strategies,
in a common design, a 48V lithium battery and DCDC are used to form a 48V power supply network, and the control logic of the lithium battery is completely different from that of the super capacitor
However, the use of a 48V lithium battery as the main battery has the following problems: 1) the 48V lithium battery is difficult to solve the performance problem of the battery at low temperature, particularly the energy absorption problem, part of 48V load can generate electricity under external excitation, the battery is required to recover energy in time, otherwise the 48V power supply voltage is increased, and the 48V load is damaged; 2) the 48VLi battery life cannot cover the entire vehicle service life, and the need for maintenance and replacement needs to be considered during design.
Disclosure of Invention
In order to solve the above technical problems, the present invention discloses a battery energy management method, which charges or pre-charges a battery through a voltage converter according to the state of the battery; the reliability of the system is improved, meanwhile, the service life of the battery is protected through setting the state and the conversion power of the voltage converter, and the service life of the power supply system of the whole vehicle is further prolonged.
In order to achieve the above object, the present invention provides a battery energy management method, including: acquiring the speed of the vehicle, the acceleration of the vehicle and the current charge of the battery;
determining the current running condition of the vehicle according to the speed of the vehicle and the acceleration of the vehicle; determining the state of a battery according to the current running condition and/or the current charge;
judging whether the state of the battery meets a first preset condition or not;
if so, controlling the voltage converter to pre-charge the battery at a preset constant current;
acquiring the voltage at two ends of the battery and the current temperature of the battery in the pre-charging process in real time;
judging whether the voltage is greater than or equal to a preset first threshold value or not;
and if so, controlling the voltage converter to charge the battery according to the current temperature.
Further, the determining the state of the battery according to the current driving condition and/or the current charge amount includes:
judging whether the current running working condition is a preset working condition or not, wherein the preset working condition indicates that the vehicle is in a static state;
if the current running working condition is a preset working condition, judging whether the current charge quantity is smaller than or equal to a preset second threshold value;
and if the current charge quantity is less than or equal to a preset second threshold value, judging that the state of the battery is a power shortage state.
Further, the determining whether the state of the battery satisfies a first preset condition includes:
judging whether the state of the battery is a power shortage state or not;
if so, judging that the state of the battery meets a first preset condition.
Further, after the controlling the voltage converter to pre-charge the battery with the preset constant current, the method further includes:
monitoring the speed of the vehicle in real time;
judging whether the speed of the vehicle is greater than a preset third threshold value or not;
if yes, a risk warning is sent out.
Further, the controlling the voltage converter to charge the battery according to the current temperature includes:
determining a standard charging voltage of the battery according to the current temperature;
and controlling the voltage converter to charge the battery at the standard charging voltage.
Further, after the controlling the voltage converter to charge the battery with the standard charging voltage, the method further includes:
acquiring a voltage value of a high-voltage end of a voltage converter and a rising speed of the voltage of the high-voltage end in the charging process in real time;
comparing the voltage value of the high-voltage end with a preset fourth threshold value, and/or comparing the rising speed of the voltage of the high-voltage end with a preset fifth threshold value;
and if the voltage value of the high-voltage end is not less than a preset fourth threshold value and/or the rising speed of the voltage of the high-voltage end is not less than a preset fifth threshold value, controlling the voltage converter to discharge the battery.
Further, after controlling the voltage converter to discharge the battery, the method further includes:
acquiring a voltage value of a high-voltage end of the voltage converter and a descending speed of the voltage value of the high-voltage end of the voltage converter in the discharging process in real time;
and adjusting the conversion power of the voltage converter from high voltage to low voltage according to the voltage value of the high voltage end of the voltage converter and the reduction speed of the voltage of the high voltage end of the voltage converter to ensure the voltage value of the high voltage end of the voltage converter to be stable.
The invention provides a battery energy management device, which comprises:
the information acquisition module is used for acquiring the speed of the vehicle, the acceleration of the vehicle and the current charge quantity of the battery;
the working condition determining module is used for determining the current running working condition of the vehicle according to the speed of the vehicle and the acceleration of the vehicle; the battery state determining module is used for determining the state of the battery according to the current running working condition and/or the current charge amount;
the first judgment module is used for judging whether the state of the battery meets a first preset condition or not;
the pre-charging module is used for controlling the voltage converter to pre-charge the battery at a preset constant current;
the first acquisition module is used for acquiring the voltage at two ends of the battery and the current temperature of the battery in the pre-charging process in real time;
the second judgment module is used for judging whether the voltage is greater than or equal to a preset first threshold value or not;
and the charging module is used for controlling the voltage converter to charge the battery according to the current temperature.
The invention provides an electronic device comprising a processor and a memory, the memory having stored therein at least one instruction, at least one program, set of codes, or set of instructions, the at least one instruction, the at least one program, the set of codes, or the set of instructions being loaded and executed by the processor to implement the battery energy management method as described above.
The present invention provides a computer readable storage medium having stored therein at least one instruction, at least one program, set of codes, or set of instructions, which is loaded and executed by a processor to implement a battery energy management method as described above.
The embodiment of the invention has the following beneficial effects:
the invention discloses a battery energy management method, which charges or pre-charges a battery through a voltage converter according to the state of the battery; the reliability of the system is improved, meanwhile, the service life of the battery is protected through setting the state and the conversion power of the voltage converter, and the service life of the power supply system of the whole vehicle is further prolonged.
Drawings
In order to more clearly illustrate the battery energy management method, apparatus, electronic device and storage medium according to the present invention, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a battery energy management system according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a battery energy management method according to an embodiment of the present invention;
fig. 3 is a schematic flowchart illustrating a method for determining a state of a battery according to an embodiment of the present invention;
fig. 4 is a schematic flowchart illustrating an energy management method in a battery charging process according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a battery energy management device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device for implementing a battery energy management method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, fig. 1 shows a system that can be used for implementing the solution of the embodiment of the present invention, as shown in fig. 1, the system may at least include a battery charging device 01 and a terminal 02, and the battery charging device 01 and the terminal 02 communicate with each other, so that charging of a lithium battery can be implemented according to a current charge amount of the lithium battery, a preset standard charge amount of the lithium battery, and a current temperature of the lithium battery, which are obtained by the lithium battery charging device.
The terminal 02 may be a vehicle control device, a smart phone, a desktop computer, a tablet computer, a notebook computer, a digital assistant, an intelligent wearable device, or other types of entity devices; wherein, wearable equipment of intelligence can include intelligent bracelet, intelligent wrist-watch, intelligent glasses, intelligent helmet etc.. Of course, the terminal 02 is not limited to the electronic device with certain entity, and may also be software running in the electronic device, for example, the terminal 02 may be a web page or application provided to the user by a service provider.
The terminal 02 may comprise a display, a storage device and a processor connected by a data bus. The display screen is used for displaying an operation interface or interacting with a user and the like, and the display screen can be a touch screen of a vehicle machine, a mobile phone or a tablet computer and the like. The storage device is used for storing program codes, data and data of the shooting device, and the storage device may be a memory of the terminal 02, or may be a storage device such as a smart media card (smart media card), a secure digital card (secure digital card), and a flash memory card (flash card). The processor may be a single core or multi-core processor.
The battery energy management method based on the above system of the present invention is described below with reference to fig. 2, and may be applied to a vehicle having batteries with various voltages; specifically, the batteries with various voltages can comprise a 12V super capacitor, a 12V lithium battery, a 48V super capacitor, a high-voltage battery and the like.
In the embodiment of the specification, the application can include but is not limited to an energy management method for a 48V super capacitor.
In the embodiments of the present specification, the 48V super capacitor may include, but is not limited to, 20 2.7V super capacitor cells of 2.7V, 350F, or 20 super capacitor cells of 3V, 350F, a connection pad, and a housing, wherein the 20 cells are connected in series; when the 48V super capacitor module is at the temperature of minus 40 ℃, the internal resistance can be controlled within 35m omega, and the capacity can be kept above 95 percent; the super capacitor module has excellent low-temperature performance; the 48V super capacitor module can control the weight below 3.5 kg.
In the illustrated embodiment, a battery system including a 48V supercapacitor as a medium voltage battery has active or passive equalization capability therein; a controller is integrated in the 48V super capacitor, a shunt and an NTC thermistor are arranged in the controller, and the shunt is used for detecting the charging and discharging current of the capacitor; the NTC thermistor is used for monitoring the temperature of the capacitor module;
the controller has a monitoring or diagnosis function, communicates through the CAN or LIN, and specifically CAN upload capacity, internal resistance, voltage, current, temperature and diagnosis information; in addition, the cycle life of the super capacitor exceeds 100 ten thousand times, and the service life of the whole vehicle can be prolonged.
Referring to fig. 2, which is a flow chart illustrating a method for managing battery energy according to an embodiment of the present invention, the present specification provides the method steps according to the embodiment or the flow chart, but is based on the conventional method; or the inventive process may include additional or fewer steps. The step sequence recited in the embodiment is only one of the execution sequence of many steps, and does not represent the only execution sequence, and the battery energy management method in the present application may be executed according to the method sequence shown in the embodiment or the drawings. Specifically, as shown in fig. 2, the method includes:
s201, acquiring the speed of a vehicle, the acceleration of the vehicle and the current charge quantity of a battery;
it should be noted that, in the embodiment of the present specification, the speed of the vehicle, the acceleration of the vehicle, and the current charge amount of the battery may be obtained in real time.
S203, determining the current running condition of the vehicle according to the speed of the vehicle and the acceleration of the vehicle; in the embodiments described herein, the current operating conditions of the vehicle may include, but are not limited to, acceleration motion, deceleration motion, uniform motion, and standstill.
Specifically, when the acceleration of the vehicle is greater than zero, it may be determined that the vehicle is in an accelerated motion state;
when the acceleration of the vehicle is less than zero, it may be determined that the vehicle is in a decelerating motion state;
when the acceleration of the vehicle is zero and the speed of the vehicle is greater than zero, the vehicle can be determined to be in a constant-speed running state;
when the acceleration of the vehicle is zero and the speed of the vehicle is also zero, it may be determined that the vehicle is in a stationary state.
S205, determining the state of a battery according to the current running condition and/or the current charge;
in the embodiment of the present specification, the state of the battery may be determined according to the current driving condition and the current charge amount; the state of the battery can also be directly determined according to the current charge amount;
in the embodiments of the present description, the state of the battery may include, but is not limited to, a power-deficient state and a normal state, and the normal state may include, but is not limited to, a full power state and a half power-deficient state.
As shown in fig. 3, in the embodiment of the present specification, a flow chart of a method for determining a state of a battery provided in the embodiment of the present specification is shown; the concrete steps are as follows:
s301, judging whether the current running working condition is a preset working condition or not, wherein the preset working condition indicates that the vehicle is in a static state;
in an embodiment of this specification, the determining whether the current driving condition is a preset condition includes:
judging whether the speed of the vehicle is zero or not;
if so, judging whether the acceleration of the vehicle is zero or not;
if yes, the current running working condition is judged to be a preset working condition.
S303, if the current running working condition is a preset working condition, judging whether the current charge quantity is less than or equal to a preset second threshold value;
in this illustrative embodiment, the preset second threshold may include, but is not limited to, 5%;
that is, in the stationary state of the vehicle, it is determined whether the current charge amount is less than or equal to 5%.
S305, if the current charge quantity is smaller than or equal to a preset second threshold value, judging that the state of the battery is a power shortage state;
in an embodiment of the present specification, if the current charge amount is less than or equal to 5%, it is determined that the state of the battery is a power-deficient state;
in another embodiment of the present specification, if the current charge amount is greater than a preset second threshold, it is determined that the state of the battery is a normal state;
in the embodiment of the present specification, if the current charge amount is less than or equal to 5%, it is determined that the state of the battery is a normal state; the normal state may include, but is not limited to, a full power state and a half power-down state.
S207, judging whether the state of the battery meets a first preset condition or not;
in an embodiment of the present specification, the determining whether the state of the battery satisfies a first preset condition includes:
judging whether the state of the battery is a power shortage state or not;
if so, judging that the state of the battery meets a first preset condition;
in the embodiment of the present specification, when the state of the battery is a power-deficient state, it may be determined that the state of the battery satisfies the first preset condition.
And S209, if so, controlling the voltage converter to pre-charge the battery at a preset constant current.
In the embodiment of the present specification, the preset constant current may be 15A; controlling the voltage converter to pre-charge the battery with a constant current of 15A; the voltage converter may include, but is not limited to, a DCDC bi-directional converter of 12V-48V.
Specifically, in the process of pre-charging the battery, the diagnosis strategy of the vehicle is adjusted, low-voltage diagnosis is not performed, and false alarm is avoided.
In another embodiment of the present specification, during the process of pre-charging the battery, the following steps may be performed:
a1, monitoring the speed of the vehicle in real time;
a2, judging whether the speed of the vehicle is greater than a preset third threshold value;
in the embodiment of the present specification, the preset third threshold may be 7 km/h;
judging whether the speed of the vehicle is greater than 7 km/h;
a3, if the speed of the vehicle is larger than a preset third threshold value, a risk warning is sent out;
in the embodiment of the specification, in the process of pre-charging the battery, if the speed of the vehicle is greater than 7km/h, a risk warning is sent out to prompt a driver that the vehicle has potential safety hazards.
S211, acquiring the voltage at two ends of the battery and the current temperature of the battery in the pre-charging process in real time;
in this illustrative embodiment, the current temperature of the battery may be detected by an internal controller.
S213, judging whether the voltage is greater than or equal to a preset first threshold value;
in the embodiments of the present specification, the preset first threshold may include, but is not limited to, 36V;
specifically, whether the voltage at two ends of the battery is greater than 36V is judged;
and S215, if yes, controlling the voltage converter to charge the battery according to the current temperature.
In the embodiment of the specification, the charging voltage of the battery is determined according to the current temperature;
specifically, in the process of pre-charging the battery, if the voltage across the battery is greater than 36V, the voltage converter is controlled to charge the battery with a charging voltage corresponding to the current temperature of the battery.
Specifically, the relationship between the current temperature of the battery and its charging voltage may include, but is not limited to, the relationship shown in the following table;
| Temp(℃) | -40 | 0 | 15 | 20 | 40 | 60 | 65 |
| Voltage(V) | 50 | 50 | 50 | 50 | 48 | 48 | 40 |
as shown in fig. 4, in the embodiment of the present specification, a flowchart of an energy management method in a battery charging process according to the embodiment of the present specification is shown; the concrete steps are as follows:
s401, acquiring a voltage value of a high-voltage end of a voltage converter and a rising speed of the voltage of the high-voltage end in the charging process in real time;
in the embodiment of the specification, during the charging process of the battery, the voltage converter works in a boost mode, wherein the boost mode is a mode for converting energy from a low-voltage end (such as 12V) to a high-voltage end (such as 48V) by the voltage converter; specifically, the conversion power thereof may be 300W;
specifically, in the process of charging the battery, the voltage value of the high-voltage end of the voltage converter and the rising speed of the voltage of the high-voltage end are acquired in real time; the rate of rise of the voltage at the high voltage terminal may include, but is not limited to, a rate of rise per second of the voltage at the high voltage terminal.
S403, comparing the voltage value of the high-voltage end with a preset fourth threshold value, and/or comparing the rising speed of the voltage of the high-voltage end with a preset fifth threshold value;
in the embodiments of the present specification, the preset fourth threshold may include, but is not limited to, 52V; the preset fifth threshold may include, but is not limited to, 2V/s;
in the embodiment of the present specification, it is determined whether the voltage value of the high-voltage terminal is not less than a preset fourth threshold value, and/or it is determined whether the rising speed of the voltage of the high-voltage terminal is not less than a preset fifth threshold value.
S405, if the voltage value of the high-voltage end is not less than a preset fourth threshold value and/or the rising speed of the voltage of the high-voltage end is not less than a preset fifth threshold value, controlling the voltage converter to discharge the battery.
In the embodiment of the present specification, if it is satisfied that the voltage value of the high-voltage terminal is not less than a preset fourth threshold, or the rising speed of the voltage of the high-voltage terminal is not less than a preset fifth threshold, or the voltage value of the high-voltage terminal is not less than a preset fourth threshold and the rising speed of the voltage of the high-voltage terminal is not less than a preset fifth threshold, the voltage converter is controlled to discharge the battery;
specifically, the reverse output of the voltage converter can be controlled; transferring the excess energy from the high pressure side (e.g., 48V) to the low pressure side (e.g., 12V); to avoid voltage rise damaging the load, which may be a 48V load.
S407, acquiring a voltage value of a high-voltage end of the voltage converter and a descending speed of the voltage value of the high-voltage end of the voltage converter in the discharging process in real time;
in the embodiment of the present specification, when the voltage converter discharges the battery, the voltage converter may be in a mode of converting energy from a high-voltage end (e.g., 48V) to a low-voltage end (e.g., 12V); specifically, the standard conversion power may be 300W.
S409, according to the voltage value of the high-voltage end of the voltage converter and the reduction speed of the voltage of the high-voltage end of the voltage converter, aiming at ensuring the voltage value of the high-voltage end of the voltage converter to be stable, adjusting the conversion power of the voltage converter from high voltage to low voltage;
in the embodiment of the present specification, the adjusting the conversion power of the voltage converter from the high voltage to the low voltage with the aim of ensuring the voltage value of the high voltage end of the voltage converter to be stable according to the voltage value of the high voltage end of the voltage converter and the falling speed of the voltage of the high voltage end of the voltage converter includes:
b1, comparing the voltage value of the high-voltage end of the voltage converter with a preset sixth threshold value, and/or comparing the descending speed of the voltage of the high-voltage end with a preset seventh threshold value;
in this embodiment, specifically, the method may include determining whether a voltage value of the high-voltage end is not greater than a preset sixth threshold; and/or judging whether the descending speed of the voltage of the high-voltage end is not less than a preset seventh threshold value;
specifically, the preset sixth threshold may include, but is not limited to, 46V; the preset seventh threshold may include, but is not limited to, 2V/s;
b2, if the voltage value of the high-voltage end is not larger than the preset sixth threshold value and/or the descending speed of the voltage of the high-voltage end is not smaller than the preset seventh threshold value, the conversion power of the voltage converter from the high voltage to the low voltage is increased.
In the embodiment of the specification, if the voltage value of the high-voltage end is not greater than a preset sixth threshold, or the descending speed of the voltage of the high-voltage end is not less than a preset seventh threshold, or the voltage value of the high-voltage end is not greater than the preset sixth threshold and the descending speed of the voltage of the high-voltage end is not less than the preset seventh threshold, the conversion power of the voltage converter from the high voltage to the low voltage is increased;
specifically, the conversion power of the voltage converter can be adjusted up on the basis of the standard conversion power converted from high voltage to low voltage.
In this embodiment, after the step up of converting power from high voltage to low voltage by the voltage converter, the method further includes:
acquiring a voltage value of a high-voltage end of a voltage converter in real time;
judging whether the voltage value of the high-voltage end is greater than or equal to a preset eighth threshold value or not;
in the embodiment of the present specification, the preset eighth threshold may include, but is not limited to, 48V;
and if the voltage value of the high-voltage end is greater than or equal to a preset eighth threshold, reducing the conversion power to the standard conversion power on the basis of the increased conversion power.
Specifically, if the voltage value of the high-voltage end is less than or equal to 46V, the conversion power of the voltage converter is increased to 600W; in the process, when the voltage value of the high-voltage end is greater than 48V, the increased conversion work (600W) is reduced to the standard conversion power of 300W again.
In another embodiment of the present specification, after the step of increasing the power converted by the voltage converter from the high voltage to the low voltage, the method further includes:
if the voltage value of the high-voltage end is detected to be smaller than or equal to a preset ninth threshold value; or if the descending speed of the voltage of the high-voltage end is not less than a preset tenth threshold, continuing to increase the conversion power of the voltage converter from the high voltage to the low voltage;
in the embodiment of the present specification, the preset ninth threshold may include, but is not limited to, 44V, and the preset tenth threshold may include, but is not limited to, 3V/s; the maximum limit for the converted power of the voltage converter from high voltage to low voltage may include, but is not limited to, 1000W;
in the process, when the voltage value of the high-voltage end is detected to be greater than 48V, the increased conversion work (such as 1000W) is reduced to the standard conversion power of 300W again.
As can be seen from the above embodiments of the battery energy management method, apparatus, electronic device, and storage medium provided by the present invention, the embodiment of the present invention obtains the speed of the vehicle, the acceleration of the vehicle, and the current charge amount of the battery; determining the current running condition of the vehicle according to the speed of the vehicle and the acceleration of the vehicle; determining the state of a battery according to the current running condition and/or the current charge; judging whether the state of the battery meets a first preset condition or not; if so, controlling the voltage converter to pre-charge the battery at a preset constant current; acquiring the voltage at two ends of the battery and the current temperature of the battery in the pre-charging process in real time; judging whether the voltage is greater than or equal to a preset first threshold value or not; if so, controlling the voltage converter to charge the battery according to the current temperature; by using the technical scheme provided by the embodiment of the specification, the battery is charged or precharged through the voltage converter according to the state of the battery; the reliability of the system is improved, meanwhile, the service life of the battery is protected through setting the state and the conversion power of the voltage converter, and the service life of the power supply system of the whole vehicle is further prolonged.
An embodiment of the present invention further provides a battery energy management device, as shown in fig. 5, which is a schematic structural diagram of the battery energy management device provided in the embodiment of the present invention; specifically, the device comprises:
an information obtaining module 510, configured to obtain a speed of a vehicle, an acceleration of the vehicle, and a current charge amount of a battery;
the working condition determining module 520 is used for determining the current running working condition of the vehicle according to the speed of the vehicle and the acceleration of the vehicle;
a battery state determining module 530, configured to determine a state of a battery according to the current driving condition and/or the current charge amount;
a first determining module 540, configured to determine whether a state of the battery meets a first preset condition;
a pre-charging module 550 for controlling the voltage converter to pre-charge the battery with a preset constant current;
the first obtaining module 560 is configured to obtain, in real time, voltages at two ends of the battery and a current temperature of the battery during the pre-charging process;
the second judging module 570 is configured to judge whether the voltage is greater than or equal to a preset first threshold;
and a charging module 580 for controlling the voltage converter to charge the battery according to the current temperature.
In an embodiment of the present specification, the battery status determining module 530 includes:
the first judgment unit is used for judging whether the current running working condition is a preset working condition or not, and the preset working condition indicates that the vehicle is in a static state;
the second judging unit is used for judging whether the current charge quantity is smaller than or equal to a preset second threshold value or not if the current running working condition is a preset working condition;
and the first judging unit is used for judging that the state of the battery is a power shortage state when the current charge amount is less than or equal to a preset second threshold value.
In this embodiment, the first determining module 540 includes:
a third determination unit configured to determine whether the state of the battery is a power-deficient state;
and the second determination unit is used for determining that the state of the battery meets a first preset condition.
In the embodiment of this specification, still include:
the speed monitoring module is used for monitoring the speed of the vehicle in real time;
the third judging module is used for judging whether the speed of the vehicle is greater than a preset third threshold value or not;
and the warning module is used for sending out a risk warning when the speed of the vehicle is greater than a preset third threshold value.
In this embodiment, the charging module 580 includes:
the standard charging voltage determining unit is used for determining the standard charging voltage of the battery according to the current temperature;
and the charging unit is used for controlling the voltage converter to charge the battery at the standard charging voltage.
In the embodiment of this specification, still include:
the first acquisition unit is used for acquiring a voltage value of a high-voltage end of the voltage converter and the rising speed of the voltage value of the high-voltage end in the charging process in real time;
the first comparison unit is used for comparing the voltage value of the high-voltage end with a preset fourth threshold value and/or comparing the rising speed of the voltage of the high-voltage end with a preset fifth threshold value;
the first control unit is used for controlling the voltage converter to discharge the battery when the voltage value of the high-voltage end is not less than a preset fourth threshold value and/or the rising speed of the voltage of the high-voltage end is not less than a preset fifth threshold value;
in the embodiment of this specification, still include:
the second acquisition unit is used for acquiring the voltage value of the high-voltage end of the voltage converter and the descending speed of the voltage value of the high-voltage end of the voltage converter in the discharging process in real time;
and the second control unit is used for adjusting the conversion power of the voltage converter from high voltage to low voltage by taking the voltage value of the high-voltage end of the voltage converter as a target to ensure the stability of the voltage value of the high-voltage end of the voltage converter according to the voltage value of the high-voltage end of the voltage converter and the reduction speed of the voltage of the high-voltage end of the voltage converter.
The embodiment of the invention provides an electronic device, which comprises a processor and a memory; the processor adapted to implement one or more instructions; the memory stores one or more instructions adapted to be loaded and executed by the processor to implement the battery energy management method as described in the above method embodiments.
The memory may be used to store software programs and modules, and the processor may execute various functional applications and data processing by operating the software programs and modules stored in the memory. The memory can mainly comprise a program storage area and a data storage area, wherein the program storage area can store an operating system, application programs needed by functions and the like; the storage data area may store data created according to use of the apparatus, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory may also include a memory controller to provide the processor access to the memory.
Further, fig. 6 shows a schematic hardware structure diagram of an electronic device for implementing the battery energy management method provided by the embodiment of the present invention, where the electronic device may participate in forming or including the apparatus or system provided by the embodiment of the present invention. As shown in fig. 6, the electronic device 1 may comprise one or more (shown as 102a, 102b, … …, 102 n) processors 102 (the processors 102 may include, but are not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 104 for storing data, and a transmission device 106 for communication functions. Besides, the method can also comprise the following steps: a display, an input/output interface (I/O interface), a Universal Serial Bus (USB) port (which may be included as one of the ports of the I/O interface), a network interface, a power source, and/or a camera. It will be understood by those skilled in the art that the structure shown in fig. 6 is only an illustration and is not intended to limit the structure of the electronic device. For example, the electronic device 1 may also include more or fewer components than shown in FIG. 6, or have a different configuration than shown in FIG. 6.
It should be noted that the one or more processors 102 and/or other data processing circuitry described above may be referred to generally herein as "data processing circuitry". The data processing circuitry may be embodied in whole or in part in software, hardware, firmware, or any combination thereof. Furthermore, the data processing circuit may be a single stand-alone processing module, or incorporated in whole or in part into any of the other elements in the electronic device 1. As referred to in the embodiments of the application, the data processing circuit acts as a processor control (e.g. selection of variable resistance termination paths connected to the interface).
The memory 104 may be used for storing software programs and modules of application software, such as program instructions/data storage devices corresponding to the method according to the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the software programs and modules stored in the memory 104, so as to implement a vehicle navigation method as described above. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the electronic device 1 over a network. Examples of such networks include, but are not limited to, vehicular networks, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used for receiving or transmitting data via a network. A specific example of the network described above may include a wireless network provided by a communication provider of the electronic apparatus 1. In one example, the transmission device 106 includes a network adapter (NIC) that can be connected to other network devices through a base station so as to communicate with the internet. In one example, the transmission device 106 can be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
The display may be, for example, a touch screen type Liquid Crystal Display (LCD) that may enable a user to interact with a user interface of the electronic device 1.
Embodiments of the present invention also provide a computer-readable storage medium, which may be disposed in a battery energy management terminal to store at least one instruction, at least one program, a code set, or a set of instructions related to implementing a battery energy management method in the method embodiments, where the at least one instruction, the at least one program, the code set, or the set of instructions may be loaded and executed by a processor of an electronic device to implement the battery energy management method provided in the method embodiments.
Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
It should be noted that: the precedence order of the above embodiments of the present invention is only for description, and does not represent the merits of the embodiments. And specific embodiments thereof have been described above. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
All the embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, as for the device and server embodiments, since they are substantially similar to the method embodiments, the description is simple, and the relevant points can be referred to the partial description of the method embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (7)
1. A battery energy management method, characterized by: the method comprises the following steps:
acquiring the speed of a vehicle, the acceleration of the vehicle and the current charge quantity of a battery;
determining the current running condition of the vehicle according to the speed of the vehicle and the acceleration of the vehicle;
if the current running working condition is that the vehicle is in a static state, judging whether the current charge quantity is smaller than or equal to a preset second threshold value;
if the current charge quantity is smaller than or equal to a preset second threshold value, judging that the state of the battery is a power shortage state;
if the battery is in a power-deficient state, controlling the voltage converter to pre-charge the battery at a preset constant current;
acquiring the voltage at two ends of the battery and the current temperature of the battery in the pre-charging process in real time;
judging whether the voltage is greater than or equal to a preset first threshold value or not;
and if so, determining the standard charging voltage of the battery according to the current temperature, and controlling the voltage converter to charge the battery by using the standard charging voltage.
2. The battery energy management method of claim 1, wherein: after the controlling the voltage converter to pre-charge the battery with a preset constant current, the method further comprises:
monitoring the speed of the vehicle in real time;
judging whether the speed of the vehicle is greater than a preset third threshold value or not;
and if the speed of the vehicle is greater than a preset third threshold value, a risk warning is sent out.
3. The battery energy management method of claim 1, wherein: after the controlling the voltage converter to charge the battery with the standard charging voltage, the method further includes:
acquiring a voltage value of a high-voltage end of a voltage converter and a rising speed of the voltage of the high-voltage end in the charging process in real time;
comparing the voltage value of the high-voltage end with a preset fourth threshold value, and/or comparing the rising speed of the voltage of the high-voltage end with a preset fifth threshold value;
and if the voltage value of the high-voltage end is not less than a preset fourth threshold value and/or the rising speed of the voltage of the high-voltage end is not less than a preset fifth threshold value, controlling the voltage converter to discharge the battery.
4. The battery energy management method of claim 3, wherein: after the controlling the voltage converter to discharge the battery, the method further includes:
acquiring a voltage value of a high-voltage end of the voltage converter and a descending speed of the voltage value of the high-voltage end of the voltage converter in the discharging process in real time;
and adjusting the conversion power of the voltage converter from high voltage to low voltage according to the voltage value of the high voltage end of the voltage converter and the reduction speed of the voltage of the high voltage end of the voltage converter to ensure the voltage value of the high voltage end of the voltage converter to be stable.
5. A battery energy management device, characterized by: the device comprises:
the information acquisition module is used for acquiring the speed of the vehicle, the acceleration of the vehicle and the current charge quantity of the battery;
the working condition determining module is used for determining the current running working condition of the vehicle according to the speed of the vehicle and the acceleration of the vehicle;
the first judgment module is used for judging whether the current charge quantity is smaller than or equal to a preset second threshold value or not if the current running working condition is that the vehicle is in a static state;
the battery state determining module is used for judging that the state of the battery is a power shortage state if the current charge amount is smaller than or equal to a preset second threshold;
the pre-charging module is used for controlling the voltage converter to pre-charge the battery at a preset constant current;
the first acquisition module is used for acquiring the voltage at two ends of the battery and the current temperature of the battery in the pre-charging process in real time;
the second judgment module is used for judging whether the voltage is greater than or equal to a preset first threshold value or not;
and the charging module is used for determining the standard charging voltage of the battery according to the current temperature and controlling the voltage converter to charge the battery by using the standard charging voltage.
6. An electronic device comprising a processor and a memory, the memory having stored therein at least one instruction, at least one program, a set of codes, or a set of instructions, the at least one instruction, the at least one program, the set of codes, or the set of instructions being loaded and executed by the processor to implement the battery energy management method of any of claims 1-4.
7. A computer-readable storage medium characterized by: the storage medium having stored therein at least one instruction, at least one program, a set of codes or a set of instructions which is loaded and executed by a processor to implement the battery energy management method as claimed in any one of claims 1-4.
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| CN115001116B (en) * | 2022-08-02 | 2022-11-29 | 深圳市驰普科达科技有限公司 | Charger charging control method, controller and charger |
| WO2024077422A1 (en) * | 2022-10-09 | 2024-04-18 | 宁德时代(上海)智能科技有限公司 | Charging control method and apparatus, device, computer-readable storage medium, and program |
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| JP6412847B2 (en) * | 2015-10-27 | 2018-10-24 | 本田技研工業株式会社 | Power storage device and control method |
| CN106004446B (en) * | 2016-05-31 | 2018-07-10 | 北京现代汽车有限公司 | Charge control method, system and the entire car controller of electric vehicle low tension battery |
| CN108544937B (en) * | 2018-03-23 | 2022-04-08 | 奇瑞汽车股份有限公司 | Automobile storage battery charging and discharging management method and system |
| CN111791749B (en) * | 2019-03-19 | 2021-11-23 | 上海汽车集团股份有限公司 | Pre-charging control method and device |
| CN110315978A (en) * | 2019-07-12 | 2019-10-11 | 重庆长安新能源汽车科技有限公司 | A kind of charging method of low tension battery, system and electric car |
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