CN111525631A - Energy management method and device for lithium battery, electronic equipment and storage medium - Google Patents
Energy management method and device for lithium battery, electronic equipment and storage medium Download PDFInfo
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- CN111525631A CN111525631A CN202010192540.XA CN202010192540A CN111525631A CN 111525631 A CN111525631 A CN 111525631A CN 202010192540 A CN202010192540 A CN 202010192540A CN 111525631 A CN111525631 A CN 111525631A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 222
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 222
- 238000007726 management method Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 43
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- 238000007599 discharging Methods 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 16
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000002253 acid Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
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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
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses an energy management method and device of a lithium battery, electronic equipment and a storage medium, wherein the method comprises the following steps: acquiring the current charge quantity, the preset standard charge quantity and the current temperature of the lithium battery; determining a target charge capacity of the lithium battery according to the current charge capacity and the preset standard charge capacity; determining a target current of the battery according to the target charge amount and the current temperature; judging whether the current charge quantity is smaller than the first threshold value; if yes, charging the lithium battery according to the target current; according to the invention, the target current of the battery is determined according to the target charge capacity of the lithium battery, and the battery is charged or discharged by the current, so that the problem of overcharge or overdischarge of the lithium battery is avoided, the reliability of the system is improved, meanwhile, the charging voltage of the battery is limited, the service life of the battery is protected, and the service life of a power supply system of the whole vehicle is further prolonged.
Description
Technical Field
The invention relates to the technical field of lithium battery charging, in particular to an energy management method and device of a lithium battery, electronic equipment and a storage medium.
Background
With the development and publicity of the intelligent driving system and the increase of the expectation degree of the user on the system, more and more vehicles start to carry the intelligent driving system, and the higher-level intelligent driving system gradually enters the visual field of people, but the higher the level of the intelligent driving system is, the higher the requirement on power supply safety is; in the design of a low-voltage power supply system of a vehicle, more and more host factories try to use new technologies to achieve the purposes of reducing weight or prohibiting lead and the like for the selection of a main battery, different battery types correspond to different energy management strategies,
in a common design, a lead-acid battery is used as a 12V battery (comprising a main battery and a backup battery), the control logic is simple, and the battery can be fully charged under a normal condition;
however, the use of a lead-acid battery as the main battery has the following problems: 1) the service life of the lead-acid storage battery is difficult to diagnose, the reliable power supply of a vehicle power supply system cannot be ensured, and particularly, the normal work of a load on a main loop of a vehicle cannot be ensured after the vehicle is used for a long time, so that the safety of the whole vehicle cannot be ensured; 2) lead-acid batteries have a relatively short life and are relatively heavy; 3) the lead-acid battery cannot be actively controlled to deal with the conditions of static current abnormality and the like;
disclosure of Invention
In order to solve the technical problems, the invention discloses an energy management method of a lithium battery, which determines the target current of the battery according to the target charge capacity of the lithium battery, and charges or discharges the battery by the current, so that the problem of overcharge or overdischarge of the lithium battery is avoided, the reliability of a system is improved, meanwhile, the charging voltage of the battery is limited, the service life of the battery is protected, and the service life of a power supply system of a whole vehicle is prolonged.
In order to achieve the above object, the present invention provides an energy management method for a lithium battery, the method comprising: acquiring the current charge quantity, the preset standard charge quantity and the current temperature of the lithium battery;
determining a target charge capacity of the lithium battery according to the current charge capacity and the preset standard charge capacity;
determining a target current of the battery according to the target charge amount and the current temperature;
comparing the current charge quantity with a preset first threshold value;
if the current charge amount is smaller than the first threshold value, charging the lithium battery according to the target current;
and if the current charge capacity is larger than the first threshold value, discharging the lithium battery according to the target current.
Further, after the charging the lithium battery according to the target current, the method further includes:
acquiring the voltage at two ends of a lithium battery in the charging process in real time;
judging whether the voltage meets a first preset condition or not;
and if so, charging the lithium battery by using a preset current limit value.
Further, still include:
acquiring the change rate of the voltage at two ends of the lithium battery in the charging or discharging process;
judging whether the change rate of the voltage is less than or equal to a preset second threshold value or not;
if yes, the change rate of the voltage is maintained to charge or discharge the battery.
Further, the determining the target charge capacity of the lithium battery according to the current charge capacity and the preset standard charge capacity includes:
subtracting the current charge quantity from the preset standard charge quantity to obtain a charge quantity difference value;
and the target charge capacity of the lithium battery with the charge capacity difference value is obtained.
Further, still include:
acquiring the current charge quantity of a lithium battery in a vehicle static mode, the current temperature of the lithium battery and electrostatic flow data of the lithium battery in a preset time period;
judging whether the current charge quantity of the lithium battery, the current temperature of the lithium battery and the static flow data meet a second preset condition or not;
if yes, the discharging of the lithium battery is stopped.
Further, the determining whether the current charge amount of the lithium battery, the current temperature of the lithium battery, and the electrostatic flow data satisfy a second preset condition includes:
comparing the current charge capacity of the lithium battery with a preset third threshold, comparing the current temperature of the lithium battery with a preset fourth threshold, and comparing the static flow data with a third preset condition;
and when the current temperature of the lithium battery is greater than a preset fourth threshold value, and/or the current charge capacity of the lithium battery is less than a preset third threshold value, and the static current data meet a third preset condition, judging that the current charge capacity of the lithium battery, the current temperature of the lithium battery and the static current data meet a second preset condition.
The invention provides an energy management device of a lithium battery, which comprises:
the information acquisition module is used for acquiring the current charge quantity, the preset standard charge quantity and the current temperature of the lithium battery;
the target charge capacity determining module is used for determining the target charge capacity of the lithium battery according to the current charge capacity and the preset standard charge capacity;
the target current determining module is used for determining the target current of the battery according to the target charge and the current temperature;
the comparison module is used for comparing the current charge quantity with a preset first threshold value;
the first charging module is used for charging the lithium battery according to the target current when the current charge amount is smaller than the first threshold;
and the first discharging module is used for discharging the lithium battery according to the target current when the current charge amount is larger than the first threshold value.
Further, still include:
the voltage acquisition module is used for acquiring the voltage at two ends of the lithium battery in the charging process in real time;
the first judgment module is used for judging whether the voltage meets a first preset condition or not;
the first processing module is used for stopping charging the lithium battery.
The invention provides an electronic device, which comprises a processor and a memory, wherein at least one instruction, at least one program, a code set or an instruction set is stored in the memory, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to realize the energy management method of the lithium battery.
The present invention provides a computer readable 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 method of energy management for a lithium battery as described above.
The embodiment of the invention has the following beneficial effects:
according to the energy management method of the lithium battery, the target current of the battery is determined according to the target charge quantity of the lithium battery, and the battery is charged or discharged by the current, so that the problem of overcharge or overdischarge of the lithium battery is avoided, the reliability of a system is improved, meanwhile, the charging voltage of the battery is limited, the service life of the battery is protected, and the service life of a power supply system of a whole vehicle is prolonged.
Drawings
In order to more clearly illustrate the energy management method, device, electronic device and storage medium of the lithium battery according to the present invention, the drawings required for the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an energy management system of a lithium battery according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of an energy management method for a lithium battery according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of a charge limiting method according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of an energy management method for a lithium battery in a stationary state of a vehicle according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an energy management device for a lithium battery according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device for implementing an energy management method for a lithium battery 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 lithium battery charging device 01 and a terminal 02, and the lithium 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, a preset standard charge amount, 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 information and the like 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), a flash memory card (flash card) and the like. The processor may be a single core or multi-core processor.
The energy management method of the lithium battery based on the system of the invention is described below with reference to fig. 2, and can be applied to vehicles with batteries of 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 embodiments of the present specification, the present application may include, but is not limited to, an energy management method for a 12V lithium battery.
In the embodiment of the present specification, a 12V lithium battery may be used as a main battery, the 12V lithium battery may include, but is not limited to, 4 LFP system lithium battery cells of 45Ah, and the four lithium battery cells are connected in series; the 12V lithium battery can control the weight below 6kg, and has great weight reduction effect compared with the existing lead-acid battery.
In the illustrated embodiment, a battery system including a 12V lithium battery as a main battery has active or passive equalization capability therein; a controller is integrated in the 12V lithium battery, has the functions of monitoring signals such as voltage, temperature and current and is communicated through LIN.
In the embodiment of the specification, a resettable safety and disconnection device is integrated in a lithium battery, and the disconnection device is used for disconnecting a power supply line of the lithium battery; the resettable fuse is used for reconnection after the power supply line of the lithium battery is disconnected.
Referring to fig. 2, which is a flowchart illustrating a method for managing energy of a lithium battery according to an embodiment of the present invention, the present specification provides the method steps according to the embodiment or the flowchart, but 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 sequences of many steps, and does not represent the only execution sequence, and the energy management method for the lithium battery in the application can be executed according to the method sequence shown in the embodiment or the attached drawings. Specifically, as shown in fig. 2, the method includes:
s201, acquiring the current charge quantity, the preset standard charge quantity and the current temperature of the lithium battery;
it should be noted that, in the embodiment of the present specification, the current temperature of the lithium battery may be detected by an internal controller;
the preset standard charge may be 90%.
S203, determining a target charge capacity of the lithium battery according to the current charge capacity and the preset standard charge capacity;
in an embodiment of this specification, the determining the target charge capacity of the lithium battery according to the current charge capacity and the preset standard charge capacity includes:
subtracting the current charge quantity from the preset standard charge quantity to obtain a charge quantity difference value;
and the target charge capacity of the lithium battery with the charge capacity difference value is obtained.
In the embodiment of the present description, the preset standard charge amount may be subtracted from the current charge amount, and the obtained charge amount difference may be a target charge amount of the lithium battery.
For example, when the current charge amount is 0, the target charge amount may be 0 to 90%, that is, 90%.
S205, determining a target current of the battery according to the target charge amount and the current temperature;
in the embodiment of the specification, the target current of the battery is determined according to the relation slope between the target charge and the current temperature;
for example, when the temperature of the lithium battery is-30 ℃ and the target charge amount is-90%, the target current of the battery is 30A; when the temperature of the lithium battery is-30 ℃ and the target charge capacity is-20%, the target current of the battery is 30A; at this time, it may be determined that the slope of the relationship between the target charge amount and the current temperature is 1; but the relationship slope is not limited to being equal to 1.
S207, comparing the current charge quantity with a preset first threshold value;
in this embodiment, the preset first threshold may include, but is not limited to, a value of a standard charge amount, that is, the first threshold may also be 90%;
s209, if the current charge amount is smaller than the first threshold value, charging the lithium battery according to the target current.
In an embodiment of the present specification, when the current charge capacity is less than 90%, the lithium battery is charged according to the target current.
S211, if the current charge capacity is larger than the first threshold value, discharging the lithium battery according to the target current
In an embodiment of the present specification, if the current charge amount is greater than 90%, the lithium battery is discharged according to the target current.
In another embodiment of the present disclosure, if the current charge amount is equal to the preset first threshold, the battery is not charged or discharged, that is, the target current of the battery is 0A.
As shown in fig. 3, in the embodiment of the present specification, a schematic flow chart of a charging limiting method provided in the embodiment of the present specification is shown; the concrete steps are as follows:
after the lithium battery is charged according to the target current, the method further comprises the following steps:
s301, acquiring the voltage at two ends of the lithium battery in the charging process in real time;
in the embodiment of the specification, in the process of charging the lithium battery at the current temperature of the lithium battery, the voltage at two ends of the lithium battery is obtained;
s303, judging whether the voltage meets a first preset condition or not;
in an embodiment of the present specification, the determining whether the voltage satisfies a first preset condition includes:
judging whether the voltage at two ends of the lithium battery is greater than or equal to a preset fifth threshold value or not;
if so, judging that the voltage meets a first preset condition;
specifically, the first preset condition may include, but is not limited to, that the voltage across the lithium battery is greater than or equal to the maximum threshold of the charging voltage of the lithium battery at the current temperature; the preset fifth threshold may include, but is not limited to, a maximum threshold of a charging voltage at a current temperature of the lithium battery;
for example, the maximum charging voltage of a lithium battery is 13.6V when the current temperature of the lithium battery is-10 ℃.
Specifically, the relationship between the temperature of the vehicle lithium battery and its maximum charging voltage may include, but is not limited to, the relationship shown in the following table;
| Temp(℃) | -40 | -10 | 0 | 10 | 45 | 65 |
| Voltage(V) | 13.6 | 13.6 | 13.7 | 14.4 | 14.4 | 13.6 |
and S305, if so, charging the lithium battery by using a preset current limit value.
In embodiments of the present description, the preset current limit may include, but is not limited to, a current of 0 amps (a); and if the voltage at the two ends of the lithium battery reaches a preset fifth threshold value, charging the lithium battery by using the current of 0A.
The charging voltage of the battery is limited according to the current temperature of the lithium battery, and the service life of the battery can be protected.
In another embodiment of the present specification, in charging and discharging a lithium battery, the method further includes:
s1, acquiring the change rate of the voltage at two ends of the lithium battery in the charging or discharging process;
in the embodiment of the specification, the change rate of the voltage across the lithium battery is obtained in real time in the charging and discharging processes of the lithium battery.
S2, judging whether the change rate of the voltage is less than or equal to a preset second threshold value;
in the embodiment of the present disclosure, the preset second threshold may include, but is not limited to, 100mV/s, that is, it is determined whether the voltage is increased or decreased by less than or equal to 100mV per second.
If so, S3, the battery is charged or discharged while maintaining the rate of change of the voltage.
In the embodiment of the present specification, if the change rate of the voltage is less than or equal to the preset second threshold, the change rate may be maintained to continue charging or discharging the lithium battery;
specifically, it is also possible that the control voltage does not increase or decrease at a rate lower than 100 mV/s.
In the embodiment of the present specification, during the running of the vehicle,
monitoring the state of the battery disconnecting device in real time;
judging whether the state of the disconnecting device is an opened state or not;
if so, a warning is sent out to remind the driver that the vehicle has risks.
As shown in fig. 4, in the embodiment of the present specification, a flowchart of a method for managing energy of a lithium battery in a stationary state of a vehicle according to the embodiment of the present specification is shown; the concrete steps are as follows:
s401, acquiring the current charge quantity of the lithium battery in a vehicle static mode, the current temperature of the lithium battery and electrostatic flow data of the lithium battery in a preset time period;
in the embodiment of the specification, in a static state of a vehicle, acquiring the current charge amount of a lithium battery, the current temperature of the lithium battery and static flow data of the lithium battery in a preset time period;
specifically, the static current data of the lithium battery in the preset time period may include, but is not limited to, a flow rate of the static current per unit time in the preset time.
S403, judging whether the current charge quantity of the lithium battery, the current temperature of the lithium battery and the static flow data meet a second preset condition;
in an embodiment of this specification, the determining whether the current charge amount of the lithium battery, the current temperature of the lithium battery, and the electrostatic flow data satisfy a second preset condition includes:
a1, comparing the current charge quantity of the lithium battery with a preset third threshold value, comparing the current temperature of the lithium battery with a preset fourth threshold value, and comparing the static flow data with a third preset condition;
specifically, it may be determined whether the current charge amount of the lithium battery is smaller than a preset third threshold, whether the current temperature of the lithium battery is greater than a preset fourth threshold, and whether the electrostatic flow data meets a third preset condition;
in this illustrative embodiment, the preset third threshold may include, but is not limited to, 15%; the preset fourth threshold may include, but is not limited to, 85 ℃; the third preset condition can be that the flow rate of the static current in each unit time is 1A within preset time;
a2, when the current temperature of the lithium battery is greater than a preset fourth threshold, and/or the current charge capacity of the lithium battery is less than a preset third threshold and the static current data meet a third preset condition, determining that the current charge capacity of the lithium battery, the current temperature of the lithium battery and the static current data meet a second preset condition;
in an embodiment of this specification, when the current temperature of the lithium battery is greater than a preset fourth threshold, or the current charge amount of the lithium battery is less than a preset third threshold and the electrostatic current data satisfies a third preset condition, or the current charge amount of the lithium battery is less than a preset third threshold and the current temperature of the lithium battery is greater than a preset fourth threshold and the electrostatic current data satisfies a third preset condition, it may be determined that the current charge amount of the lithium battery, the current temperature of the lithium battery, and the electrostatic current data satisfy a second preset condition.
And S405, if so, stopping the discharge of the lithium battery.
In the embodiment of the present specification, when it is determined that the current charge amount of the lithium battery, the current temperature of the lithium battery, and the electrostatic flow data satisfy a second preset condition, a disconnection device of the lithium battery may be turned on, so that the lithium battery terminates discharging; the lithium battery is over-discharged on the surface, which affects the service life of the lithium battery.
In the embodiment of the present specification, in any one of the following cases, the resettable fuse of the lithium battery reconnects the line of the disconnected lithium battery;
when the Lin bus starts to transmit signals or the external voltage of the lithium battery is higher than a limit value or a mechanical switch is triggered, the disconnected lithium battery line can be connected; to resume normal charging and discharging.
Specifically, the external voltage of the lithium battery is higher than the limit value, and the external voltage of the lithium battery is higher than the current voltage value of the lithium battery plus 0.2V.
According to the embodiment of the energy management method, the energy management device, the electronic equipment and the storage medium of the lithium battery provided by the invention, the current charge capacity, the preset standard charge capacity and the current temperature of the lithium battery are obtained; determining a target charge capacity of the lithium battery according to the current charge capacity and the preset standard charge capacity; determining a target current of the battery according to the target charge amount and the current temperature; judging whether the current charge quantity is smaller than the first threshold value; if yes, charging the lithium battery according to the target current; by utilizing the technical scheme provided by the embodiment of the specification, the target current of the battery is determined according to the target charge capacity of the lithium battery, and the battery is charged or discharged by the current, so that the problem of overcharge or overdischarge of the lithium battery is avoided, the reliability of the system is improved, meanwhile, the charging voltage of the battery is limited, the service life of the battery is protected, and the service life of a power supply system of the whole vehicle is further prolonged.
An embodiment of the present invention further provides an energy management device for a lithium battery, as shown in fig. 5, which is a schematic structural diagram of the energy management device for a lithium battery provided in the embodiment of the present invention; specifically, the device comprises:
the information acquisition module 510 is configured to acquire a current charge capacity, a preset standard charge capacity, and a current temperature of the lithium battery;
a target charge amount determining module 520, configured to determine a target charge amount of the lithium battery according to the current charge amount and the preset standard charge amount;
a target current determination module 530, configured to determine a target current of the battery according to the target charge amount and the current temperature;
a comparing module 540, configured to compare the current charge amount with a preset first threshold;
a first charging module 550, configured to charge the lithium battery according to the target current if the current charge amount is smaller than the first threshold;
the first discharging module 560 is configured to discharge the lithium battery according to the target current if the current charge amount is greater than the first threshold.
In the embodiment of this specification, still include:
the voltage acquisition module is used for acquiring the voltage at two ends of the lithium battery in the charging process in real time;
the first judgment module is used for judging whether the voltage meets a first preset condition or not;
the first processing module is used for charging the lithium battery with a preset current limit value.
In the embodiment of this specification, still include:
the change rate acquisition module is used for acquiring the change rate of the voltage at two ends of the lithium battery in the charging or discharging process;
the second judgment module is used for judging whether the change rate of the voltage is less than or equal to a preset second threshold value or not;
and the second processing module is used for maintaining the change rate of the voltage to charge or discharge the battery.
In this embodiment, the target charge amount determining module 520 includes:
the first processing unit is used for subtracting the current charge capacity from the preset standard charge capacity to obtain a charge capacity difference value;
and the second processing unit is used for processing the target charge quantity of the charge quantity difference lithium battery.
In the embodiment of this specification, still include:
the first acquisition module is used for acquiring the current charge quantity of the lithium battery in a vehicle static mode, the current temperature of the lithium battery and the static flow data of the lithium battery in a preset time period;
the third judging module is used for judging whether the current charge quantity of the lithium battery, the current temperature of the lithium battery and the static flow data meet a second preset condition or not;
and the third processing module is used for stopping the discharge of the lithium battery.
In an embodiment of this specification, the third determining module includes:
the comparison unit is used for comparing the current charge capacity of the lithium battery with a preset third threshold, comparing the current temperature of the lithium battery with a preset fourth threshold, and comparing the static flow data with a third preset condition;
the judging unit is used for judging that the current charge capacity of the lithium battery, the current temperature of the lithium battery and the static current data meet a second preset condition when the current temperature of the lithium battery is larger than a preset fourth threshold value, and/or the current charge capacity of the lithium battery is smaller than a preset third threshold value and the static current data meet a third preset condition.
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, and the one or more instructions are suitable for being loaded and executed by the processor to realize the energy management method of the lithium battery according to the method embodiment.
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 is a schematic diagram of a hardware structure of an electronic device for implementing the energy management method for a lithium battery according to the embodiment of the present invention, where the electronic device may participate in forming or including the apparatus or system according to 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 a variable resistance termination path 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. Specific examples of the network described above may include a wireless network provided by a communication provider of the electronic device 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 further provide a computer-readable storage medium, where the storage medium may be disposed in an energy management terminal of a lithium battery to store at least one instruction, at least one program, a code set, or a set of instructions related to implementing an energy management method of the lithium battery in the method embodiments, and 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 energy management method of the lithium battery 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.
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 the 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 (10)
1. An energy management method of a lithium battery is characterized in that: the method comprises the following steps:
acquiring the current charge quantity, the preset standard charge quantity and the current temperature of the lithium battery;
determining a target charge capacity of the lithium battery according to the current charge capacity and the preset standard charge capacity;
determining a target current of the battery according to the target charge amount and the current temperature;
comparing the current charge quantity with a preset first threshold value;
if the current charge amount is smaller than the first threshold value, charging the lithium battery according to the target current;
and if the current charge capacity is larger than the first threshold value, discharging the lithium battery according to the target current.
2. The energy management method of a lithium battery as claimed in claim 1, wherein: after the lithium battery is charged according to the target current, the method further comprises the following steps:
acquiring the voltage at two ends of a lithium battery in the charging process in real time;
judging whether the voltage meets a first preset condition or not;
and if so, stopping charging the lithium battery by using a preset current limit value.
3. The energy management method of a lithium battery as claimed in claim 1, wherein: further comprising:
acquiring the change rate of the voltage at two ends of the lithium battery in the charging or discharging process;
judging whether the change rate of the voltage is less than or equal to a preset second threshold value or not;
if yes, the change rate of the voltage is maintained to charge or discharge the battery.
4. The energy management method of a lithium battery as claimed in claim 1, wherein: the determining the target charge capacity of the lithium battery according to the current charge capacity and the preset standard charge capacity comprises the following steps:
subtracting the current charge quantity from the preset standard charge quantity to obtain a charge quantity difference value;
and the target charge capacity of the lithium battery with the charge capacity difference value is obtained.
5. The energy management method of a lithium battery as claimed in claim 1, wherein: further comprising:
acquiring the current charge quantity of a lithium battery in a vehicle static mode, the current temperature of the lithium battery and electrostatic flow data of the lithium battery in a preset time period;
judging whether the current charge quantity of the lithium battery, the current temperature of the lithium battery and the static flow data meet a second preset condition or not;
if yes, the discharging of the lithium battery is stopped.
6. The energy management method of a lithium battery as claimed in claim 5, wherein: the judging whether the current charge quantity of the lithium battery, the current temperature of the lithium battery and the static flow data meet a second preset condition comprises the following steps:
comparing the current charge capacity of the lithium battery with a preset third threshold, comparing the current temperature of the lithium battery with a preset fourth threshold, and comparing the static flow data with a third preset condition;
and when the current temperature of the lithium battery is greater than a preset fourth threshold value, and/or the current charge capacity of the lithium battery is less than a preset third threshold value, and the static current data meet a third preset condition, judging that the current charge capacity of the lithium battery, the current temperature of the lithium battery and the static current data meet a second preset condition.
7. An energy management device of lithium battery, its characterized in that: the device comprises:
the information acquisition module is used for acquiring the current charge quantity, the preset standard charge quantity and the current temperature of the lithium battery;
the target charge capacity determining module is used for determining the target charge capacity of the lithium battery according to the current charge capacity and the preset standard charge capacity;
the target current determining module is used for determining the target current of the battery according to the target charge and the current temperature;
the comparison module is used for comparing the current charge quantity with a preset first threshold value;
the first charging module is used for charging the lithium battery according to the target current when the current charge amount is smaller than the first threshold;
and the first discharging module is used for discharging the lithium battery according to the target current when the current charge amount is larger than the first threshold value.
8. The energy management device for a lithium battery as claimed in claim 7, wherein: further comprising:
the voltage acquisition module is used for acquiring the voltage at two ends of the lithium battery in the charging process in real time;
the first judgment module is used for judging whether the voltage meets a first preset condition or not;
the first processing module is used for stopping charging the lithium battery.
9. An electronic device, comprising a processor and a memory, wherein at least one instruction, at least one program, a set of codes, or a set of instructions is stored in the memory, and wherein the at least one instruction, the at least one program, the set of codes, or the set of instructions is loaded and executed by the processor to implement the method for energy management of a lithium battery according to any one of claims 1-7.
10. A computer-readable storage medium characterized by: the storage medium has stored therein at least one instruction, at least one program, a set of codes, or a set of instructions that is loaded and executed by a processor to implement the method of energy management for a lithium battery of any of claims 1-7.
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