CN117642906A - Computing device and method, device and medium for charging battery of computing device - Google Patents
Computing device and method, device and medium for charging battery of computing device Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 105
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- 238000004364 calculation method Methods 0.000 abstract description 22
- 238000007726 management method Methods 0.000 description 17
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 10
- 229910001416 lithium ion Inorganic materials 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- 239000000306 component Substances 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 230000014509 gene expression Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 239000000178 monomer Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- 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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The application discloses a computing device and a method, a device and a medium for charging a battery of the computing device. By applying the technical scheme, in the initial charging process, the electric device is charged for a period of time by the small-rate current, and the real residual electric quantity value matched with the current voltage value is determined through the corresponding relationship between the state of charge (SOC) of the battery and the voltage under the pre-generated small-rate charging. And further, the problem of inaccurate calculation of the residual electric quantity value caused by different states of the electric devices in the related art is avoided. And also ensures the safety problem of the battery in the charging process.
Description
The present disclosure relates to battery management technology, and more particularly, to a computing device and a method, a device and a medium for charging a battery of the computing device.
With the development of science and technology, more and more electric devices can realize operation functions in a manner of bearing batteries.
Taking an electric device as an electric automobile as an example, in the related art, with the rapid popularization of new energy electric automobiles, the use states of electric automobiles in the market before the charging start time are quite different. For example, it is possible that the electric vehicle is in a high-rate discharge state immediately before charging, and it is also possible that the electric vehicle is in a long-time stationary state immediately before charging. Therefore, when the electric vehicle is at the charging start time, how to accurately judge the state of the residual electric quantity value of the current battery according to the current collected data is very important to the charging safety of the battery
However, the response of the residual electric power value in the related art generally has a problem in that the calculation of the residual electric power value is inaccurate due to the different states of the power consumption devices.
Disclosure of Invention
The embodiment of the application provides a computing device, a charging method, a device and a medium for a battery of the computing device. Therefore, the problem of inaccurate calculation of the residual electric quantity value caused by different states of the electric devices in the related technology is solved.
According to one aspect of the embodiments of the present application, a method for charging a battery is provided, including:
continuously charging the battery with a first charging current value, and detecting a voltage value of the battery within a target time range after a first charging period;
and determining the current residual electric quantity value of the battery according to the voltage value.
In the technical scheme of the embodiment of the application, after a charging start instruction is detected, the battery is continuously charged by a first charging current value, and the voltage value of the battery in a target time range after a first charging time period is detected; and determining the current residual electric quantity value of the battery according to the voltage value. By applying the technical scheme, in the initial charging process, the electric device is charged for a period of time by the small-rate current, and the real residual electric quantity value matched with the current voltage value is determined through the corresponding relationship between the state of charge (SOC) of the battery and the voltage under the pre-generated small-rate charging. And further, the problem of inaccurate calculation of the residual electric quantity value caused by different states of the electric devices in the related art is avoided. And also ensures the safety problem of the battery in the charging process.
Optionally, in another embodiment based on the above method of the present application, determining the current remaining electric power value of the battery according to the voltage value includes: and selecting a residual electric quantity value matched with the voltage value of the battery in the target time range from a preset SOC data set. By applying the technical scheme, in the initial charging process, the real residual electric quantity value matched with the current voltage value can be determined through the pre-generated SOC data set of the battery under the small-rate charging after the electric device is charged for a period of time by the small-rate current. And further, the problem of inaccurate calculation of the residual electric quantity value caused by different states of the electric devices in the related art is avoided. And also ensures the safety problem of the battery in the charging process.
Optionally, in another embodiment of the method according to the present application, before continuously charging the battery with the first charging current value, the method further includes: acquiring attribute parameters of a battery cell; and selecting a first current value and a first time period matched with the attribute parameters based on a preset attribute data set. By applying the technical scheme, the small-rate current value and the corresponding charging time length corresponding to the current to-be-charged battery can be selected according to different attribute parameters of the current to-be-charged battery before initial charging. And then determining the real residual electric quantity value matched with the current voltage value through the corresponding relation between the state of charge (SOC) of the battery and the voltage under the pre-generated small-rate charging after the corresponding charging time of the small-rate current value for charging the electric device.
Optionally, in another embodiment based on the above method of the present application, detecting a voltage value of the battery within a target time range after the first period of charging includes: taking any time period after the battery is charged for the first time period as a target time range; and detecting the maximum dynamic voltage value and the minimum dynamic voltage value which are reached by the battery in the target time range. By applying the technical scheme, in the initial charging process, the power utilization device is charged for a period of time by the low-rate current, and then the maximum and minimum dynamic voltages of the battery in a certain time range are detected, so that the actual residual electric quantity value matched with the maximum and minimum dynamic voltages is determined according to the SOC data set. And then the purpose that the interlinked charging error can not appear in the current charging process is realized, and the problem that potential safety hazards exist in the charging process caused by the overcurrent of the charging current in the current charging process is avoided.
Optionally, in another embodiment based on the above method of the present application, determining the current remaining electric power value of the battery according to the voltage value includes: based on a preset SOC data set, a residual electric quantity value corresponding to a maximum dynamic voltage value and a minimum dynamic voltage value reached by the battery is determined. By applying the technical scheme, in the initial charging process, the power utilization device is charged for a period of time by the low-rate current, and then the maximum and minimum dynamic voltages of the battery in a certain time range are detected, so that the actual residual electric quantity value matched with the maximum and minimum dynamic voltages is determined according to the SOC data set. And then the purpose that the interlinked charging error can not appear in the current charging process is realized, and the problem that potential safety hazards exist in the charging process caused by the overcurrent of the charging current in the current charging process is avoided.
Optionally, in another embodiment of the method according to the present application, after determining the current remaining capacity value of the battery according to the voltage value, the method further includes: determining a maximum charging current value corresponding to the residual current value based on a preset current data set, wherein the maximum charging current value is larger than the first charging current value; the battery is charged based on the maximum charging current value. By applying the technical scheme, after the real residual electric quantity value matched with the maximum and minimum dynamic voltage is determined, the maximum charging current value matched with the current real SOC state is determined based on the current data set generated in advance, so that the battery is charged at the normal high multiplying power by the maximum charging current value, the charging safety problem of the battery can be guaranteed, and the charging efficiency of the battery is improved.
Optionally, in another embodiment based on the above method of the present application, determining a maximum charging current value corresponding to the remaining current value based on the preset current data set includes: obtaining a maximum temperature value and a minimum temperature value which are reached by the battery in a target time range; based on the current data set, a maximum charging current value corresponding to the remaining power value, the maximum temperature value, and the minimum temperature value is determined. By applying the technical scheme, after the true residual electric quantity value matched with the maximum and minimum dynamic voltage is determined, the corresponding maximum charging current value is accurately matched based on the current true SOC state of the battery and the maximum and minimum temperature reached by the battery in the charging process based on the pre-generated current data set, so that the battery is charged at normal high multiplying power by the maximum charging current value, the charging safety problem of the battery can be guaranteed, and the charging efficiency of the battery is improved.
Optionally, in another embodiment based on the above method of the present application, charging the battery based on the maximum charging current value includes: obtaining a maximum output current value of a charging device for charging a battery; and if the maximum charging current value is less than or equal to the maximum output current value, charging the battery with the maximum charging current value. And if the maximum charging current value is determined to be larger than the maximum output current value, charging the battery at the maximum output current value. By applying the technical scheme, after the corresponding maximum charging current value is accurately matched based on the current real SOC state of the battery and the maximum and minimum temperature reached by the battery in the charging process, the maximum charging current value is compared with the maximum output current value reached by the charging pile. To ensure that the battery is charged at a smaller value of the maximum charging current value and the maximum output current value. Therefore, the charging safety problem of the battery can be guaranteed, and the charging efficiency of the battery is improved.
According to still another aspect of the embodiments of the present application, there is provided a charging device for a battery, including: the detection module is configured to detect a charging start instruction, continuously charge the battery at a first charging current value, and detect a voltage value of the battery within a target time range after a first charging period; and the determining module is configured to determine the current residual electric quantity value of the battery according to the voltage value.
According to yet another aspect of embodiments of the present application, there is provided a computing device comprising:
a memory for storing executable instructions; and
and the display is used for executing the executable instructions with the memory so as to finish the operation of the battery charging method.
According to still another aspect of the embodiments of the present application, there is provided a computer-readable storage medium storing computer-readable instructions that, when executed, perform the operations of any of the above-described methods of charging a battery.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.
The present application will be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a power supply device applied to a battery according to the present application;
Fig. 2 is a schematic diagram of a method for charging a battery according to the present application;
fig. 3 is a schematic flow chart of a controller of a battery according to the present application;
fig. 4 is a schematic structural diagram of an electronic device for charging a battery according to the present application;
fig. 5 is a schematic diagram of a computing device as proposed in the present application.
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In addition, the technical solutions of the embodiments of the present application may be combined with each other, but it is necessary to base that the implementation of the technical solutions by those skilled in the art should be considered that the combination of the technical solutions does not exist or is not within the scope of protection claimed in the present application when the combination of the technical solutions contradicts or cannot be implemented.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is correspondingly changed.
A charging method for performing a battery according to an exemplary embodiment of the present application is described below with reference to fig. 1 to 3. It should be noted that the following application scenario is only shown for the convenience of understanding the spirit and principles of the present application, and embodiments of the present application are not limited in any way in this respect. Rather, embodiments of the present application may be applied to any scenario where applicable.
With the development of science and technology, more and more electric devices can realize operation functions in a manner of bearing batteries.
Taking an electric device as an automobile, in the related art, the automobile is one of important transportation means for human beings, and with the progress of the age, the amount of people's average conservation of the automobile in China is continuously increasing, and the automobile is already driven into thousands of families. Electric vehicles driven by power batteries are becoming popular with people due to their environmental protection.
Further, the power battery is a core component of the electric automobile. In the charging process of the electric automobile, the charging request current is used as a reference calculation basis of the charging request current according to the SOC state of the lithium ion battery or the maximum/minimum voltage value of the single battery in the PACK; the conventional charging request current calculation method is generally as follows; checking a charging window table according to the maximum temperature/minimum temperature/and (maximum voltage/minimum voltage or maximum SOC/minimum SOC) in the charging process in a pairwise combination way, and taking the charging window table as a charging request current value of the battery pack; the charging dynamic voltage of most lithium ion battery systems can monotonically increase along with the increase of the SOC state in the charging process. However, there is a special battery core, and the charging dynamic voltage of the lithium ion battery in the charging process is not in a monotonically increasing relationship due to the consideration of the problems of the over-temperature of the battery in the charging process or the process capability of the battery core. With the increase of the SOC, the voltage is in a fluctuation relationship, so that the same charging dynamic voltage will be caused, a plurality of charging power values will be corresponding, and for the system battery core, a simple manner of checking the charging window according to the real-time dynamic voltage of the battery core is not applicable.
The applicant notes that at least the following problems exist in the prior art, namely, the higher the charging State Of Charge (State Of Charge-SOC) Of a lithium ion battery is in the charging process, the more the lithium intercalation amount is, and the smaller the charging capability current Of the battery core is; therefore, the charging capacity of the low-end SOC area is higher than that of the high-end SOC area at the same ambient temperature; with the improvement of the SOC state, the charging capacity of the battery cell is gradually reduced; the charging capability of the lithium ion battery shows a strong correlation with the SOC state.
In the related art, the calculation method of the SOC state value of the power utilization device is according to the current battery charging capacity/the current actual battery capacity of the battery; the charging capacity of the battery cell may cause calculation deviation problem due to sampling accuracy problem of the current sensor in actual use process; the current actual capacity value of the battery cell may be due to deviation of calculated amounts such as SOH (state of health) and the like in the actual application process, and the actual capacity value of the battery cell may be also inaccurate in calculation; therefore, in the actual use process of the electric automobile, the SOC state value may have larger deviation, and the precision cannot be accurately ensured.
In addition, since the use states of electric vehicles on the market before the charging start time are quite different, the electric vehicles may be in a high-rate discharging state immediately before charging, and may be in a long-time standing state immediately before charging. Specifically, when the electric automobile is at the charging starting moment, how to accurately judge the state of charge (SOC) of the current battery according to the current collected data is very important for the charging safety of the battery; if the SOC state in the initial stage of charging is positioned incorrectly, the initial current value will be used incorrectly, and meanwhile, the cascade charging error is likely to occur in the current charging process, so that the charging current in the current charging process has an overcharge window and the charging overcurrent problem occurs. The lithium ion battery is subjected to lithium precipitation phenomenon caused by over-current charging, and when the lithium precipitation times are enough, the risk of gradual reduction of the thermal safety stability of the lithium ion battery can occur, so that the problem of use safety of the battery is caused;
The embodiment of the application provides an electricity utilization device with a battery as a power supply, wherein the electricity utilization device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.
In one form, the battery packs herein are rechargeable, such as lithium ion batteries, nickel hydrogen batteries, nickel chromium batteries, nickel zinc batteries, and the like.
For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1000.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.
In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.
In one mode, the application also provides a computing device, and a method, a device and a medium for charging a battery of the computing device.
Fig. 2 schematically shows a flow chart of a method of charging a battery according to an embodiment of the present application. As shown in fig. 2, the method includes:
s101 continuously charges the battery at a first charging current value, and detects a voltage value of the battery within a target time range after the charging for a first period of time.
Further, the charging start instruction in the embodiment of the present application may be an instruction generated after the user connects the power device with the charging device. As an example, a user may insert a charging gun of a powered device into a powered device (e.g., a charging peg) to enter charging.
In one possible implementation, when the charging pile and the electricity consumption device complete information interaction, and the electricity consumption device and a Battery Management System (BMS) complete internal communication, the Battery Management System (BMS) can calculate the acceptable charging capacity of the current battery cell according to internal calculation logic and send the acceptable charging capacity to the electricity consumption device and the charging pile. Further, after the charging pile receives the charging request current and the related information sent by the BMS, the charging pile can respond to and output the related request charging current (i.e. the first charging current value).
Wherein a BMS (battery management system) in the electricity consumption device receives a charge start command acting on the battery. Wherein, BMS is in order to intelligent management and maintain each battery unit, prevents that the battery from appearing overcharging and overdischarging, prolongs the life of battery, monitors the state of battery.
In one mode, the BMS battery management system unit comprises a BMS battery management system, a control module, a display module, a wireless communication module, electric equipment, a battery pack for supplying power to the electric equipment and an acquisition module for acquiring battery information of the battery pack, wherein the BMS battery management system is connected with the wireless communication module and the display module through communication interfaces respectively, the output end of the acquisition module is connected with the input end of the BMS battery management system, the output end of the BMS battery management system is connected with the input end of the control module, the control module is connected with the battery pack and the electric equipment respectively, and the BMS battery management system is connected with the server end through the wireless communication module.
Note that the first charging current value in the embodiment of the present application is a small-rate current value (c_lowrate) used. Specifically, when the battery management system detects that the state of charge has been entered, the charging is first performed using a small-rate current, and after the charging is performed for a period of time (first period of time), the voltage value of the battery is detected within a target time range.
As an example, the first charge current value of the small magnification may be 5A or 10A or the like. The present application is not limited in this regard. For example, 10 percent or 20 percent of the maximum charge current capability of the battery, etc.
For example, after detecting the charge start command, for example, the electric device may continuously charge the battery at the first charge current value of 5A for 120 seconds, and during 10 seconds (i.e., 121 th second to 130 th second, the target time range) after 120 seconds, the BMS detects the voltage value of the battery within the time range of 10 seconds (where the battery is continuously charged at the first charge current value of small multiplying power).
In one mode, the voltage value of the battery may be the voltage value of a certain cell of the battery or the voltage value of the battery pack. The present application is not limited in this regard.
Alternatively, the detected battery voltage values of the embodiments of the present application may be the maximum dynamic voltage value and the minimum dynamic voltage value reached by the battery during the 10 second charging period.
S102, determining the current residual electric quantity value of the battery according to the voltage value.
In one mode, in the embodiment of the application, after determining that the battery is charged for a period of time (the first period of time) at the first charging current value with a small multiplying power, the remaining electric quantity value matched with the voltage value can be selected according to the preset data set after the voltage value reached by the battery. And taking the selected residual electric quantity value as the actual electric quantity value of the battery.
It can be understood that, because the use states of the electric devices before the charging start time are quite different, it is possible that the electric devices are in a high-rate discharging state immediately before charging, and it is also possible that the electric devices are in a long-time standing state immediately before charging, which all cause the states of the batteries to be different, so that the accuracy of the calculated residual electric quantity value is also affected.
Therefore, the application proposes a method that the calculation of the residual electric quantity value is not carried out in the initial charging process, but is carried out for a period of time by carrying out small-rate charging, so that after the stability of the battery material tends to be stable, the residual electric quantity value matched with the current voltage value is determined in a table look-up mode. Thereby ensuring the accuracy of calculating the remaining battery power value. The problem that the charging current in the current charging process has the overcharge window and the charging overcurrent is avoided due to the fact that the interlinked charging errors occur in the current charging process under the condition that the use errors of the initial current value are determined is avoided. The lithium ion battery is charged and overflowed to cause a lithium precipitation phenomenon, and when the lithium precipitation times are enough, the thermal safety stability of the lithium ion battery is gradually reduced, so that the use safety problem of the battery is caused.
In the technical scheme of the embodiment of the application, after a charging start instruction is detected, the battery is continuously charged by a first charging current value, and the voltage value of the battery in a target time range after a first charging time period is detected; and determining the current residual electric quantity value of the battery according to the voltage value. By applying the technical scheme, in the initial charging process, the electric device is charged for a period of time by the small-rate current, and the real residual electric quantity value matched with the current voltage value is determined through the corresponding relationship between the state of charge (SOC) of the battery and the voltage under the pre-generated small-rate charging. And further, the problem of inaccurate calculation of the residual electric quantity value caused by different states of the electric devices in the related art is avoided. And also ensures the safety problem of the battery in the charging process.
Optionally, in another embodiment based on the above method of the present application, determining the current remaining electric power value of the battery according to the voltage value includes: and selecting a residual electric quantity value matched with the voltage value of the battery in the target time range from a preset SOC data set.
In one manner, the preset SOC data set in the embodiment of the present application may include a corresponding association relationship between each voltage value and a corresponding residual electric power value. So that after the voltage value of the battery reached within the target time range is obtained, the residual electric quantity value associated with the battery can be determined according to the voltage value.
As one example, the SOC data set may be a data set in tabular form. For example as shown in table 1 below:
as another example, the SOC data set may also be a data set in the form of a formula. Namely, the calculation formulas of each SOC and the corresponding voltage value are recorded in the SOC data set. So that the BMS obtains a certain voltage value and then calculates a corresponding residual electric quantity value by using a corresponding calculation formula.
By applying the technical scheme, in the initial charging process, the real residual electric quantity value matched with the current voltage value can be determined through the pre-generated SOC data set of the battery under the small-rate charging after the electric device is charged for a period of time by the small-rate current. And further, the problem of inaccurate calculation of the residual electric quantity value caused by different states of the electric devices in the related art is avoided. And also ensures the safety problem of the battery in the charging process.
Optionally, in another embodiment of the method according to the present application, before continuously charging the battery with the first charging current value, the method further includes: acquiring attribute parameters of a battery cell; and selecting a first current value and a first time period matched with the attribute parameters based on a preset attribute data set.
In one manner, in the embodiment of the application, when determining the first charging current value and the first period of time for charging the battery in the initial charging process, specific selection of data of the first charging current value and the first period of time can be determined according to different battery cell attribute parameters.
Among other attribute parameters, the maximum/minimum temperature value, maximum/minimum voltage value, material of interest, total time period used, current remaining electrical power value, etc. of the electrical cell may be included, but are not limited to.
By applying the technical scheme, the small-rate current value and the corresponding charging time length corresponding to the current to-be-charged battery can be selected according to different attribute parameters of the current to-be-charged battery before initial charging. And then determining the real residual electric quantity value matched with the current voltage value through the corresponding relation between the state of charge (SOC) of the battery and the voltage under the pre-generated small-rate charging after the corresponding charging time of the small-rate current value for charging the electric device.
Optionally, in another embodiment based on the above method of the present application, detecting a voltage value of the battery within a target time range after the first period of charging includes: taking any time period after the battery is charged for the first time period as a target time range; and detecting the maximum dynamic voltage value and the minimum dynamic voltage value reached by the battery in the target time range.
For example, after detecting the charge start command, for example, the electric device may continuously charge the battery at the first charge current value of 5A for 300 seconds, and during 10 seconds (i.e., 301 th to 310 th seconds, the target time range) after 300 seconds, the BMS detects the maximum dynamic voltage value of 500mv and the minimum dynamic voltage value of 100mv reached by the battery within the time range of 10 seconds (in which the battery also continuously charges the battery at the first charge current value of 5A).
For another example, when the power consumption device detects the charge start command, the first charge current value of 5A may continue to charge the battery for 100 seconds, and during 1 second (i.e., 101 th second, target time range) after 300 seconds, the BMS detects the maximum dynamic voltage value 400mv and the minimum dynamic voltage value 100mv reached by the battery within the time range of 1 second (wherein the battery also continues to charge the battery at the first charge current value of 5A within the target time range).
The maximum dynamic voltage value and the minimum dynamic voltage value may be the maximum dynamic voltage value and the minimum dynamic voltage value of the battery cell. The maximum dynamic voltage value and the minimum dynamic voltage value of the battery pack can be also used. The present application is not limited in this regard.
By applying the technical scheme, in the initial charging process, the power utilization device is charged for a period of time by the low-rate current, and then the maximum and minimum dynamic voltages of the battery in a certain time range are detected, so that the actual residual electric quantity value matched with the maximum and minimum dynamic voltages is determined according to the SOC data set. And then the purpose that the interlinked charging error can not appear in the current charging process is realized, and the problem that potential safety hazards exist in the charging process caused by the overcurrent of the charging current in the current charging process is avoided.
Optionally, in another embodiment based on the above method of the present application, determining the current remaining electric power value of the battery according to the voltage value includes: based on a preset SOC data set, a residual electric quantity value corresponding to a maximum dynamic voltage value and a minimum dynamic voltage value reached by the battery is determined.
As one example, the SOC data set may be a data set in tabular form. That is, the table contains a set of residual electric power values corresponding to each maximum dynamic voltage value and each minimum dynamic voltage value.
As another example, the SOC data set may also be a data set in the form of a formula. Namely, the calculation formulas of the maximum SOC/the minimum SOC and the corresponding voltage values are recorded in the SOC data set. After the BMS obtains the maximum SOC/minimum SOC of the battery in the target time range, the corresponding residual electric quantity value is calculated by using a corresponding calculation formula.
By applying the technical scheme, in the initial charging process, the power utilization device is charged for a period of time by the low-rate current, and then the maximum and minimum dynamic voltages of the battery in a certain time range are detected, so that the actual residual electric quantity value matched with the maximum and minimum dynamic voltages is determined according to the SOC data set. And then the purpose that the interlinked charging error can not appear in the current charging process is realized, and the problem that potential safety hazards exist in the charging process caused by the overcurrent of the charging current in the current charging process is avoided.
Optionally, in another embodiment of the method according to the present application, after determining the current remaining capacity value of the battery according to the voltage value, the method further includes: determining a maximum charging current value corresponding to the residual current value based on a preset current data set, wherein the maximum charging current value is larger than the first charging current value; the battery is charged based on the maximum charging current value.
Further, in the embodiment of the present application, after determining the actual remaining power value of the battery, the charging efficiency of the battery is improved. It is also necessary to further calculate a maximum charge current value reflecting the maximum charge current capability of the battery. So that the charging device can charge the battery by using the maximum charging current value according to the instruction.
In one mode, the embodiment of the application can select the maximum charging current value matched with the actual residual current value according to the preset current data set. And taking the selected maximum charging current value as the actual charging current of the battery.
The maximum charging current value is the high-rate current. For rapidly charging between batteries.
As an example, the current data set may be a data set in tabular form. That is, the table contains a set of maximum charging current values corresponding to the respective remaining current values. For example as shown in table 2:
as another example, the current data set may also be a data set in the form of a formula. Namely, a calculation formula corresponding to the maximum charging current value of each residual current value is recorded in the current data set. After the BMS obtains the real residual electric quantity of the battery, the corresponding maximum charging current value is calculated by using a corresponding calculation formula.
By applying the technical scheme, after the real residual electric quantity value matched with the maximum and minimum dynamic voltage is determined, the maximum charging current value matched with the current real SOC state is determined based on the current data set generated in advance, so that the battery is charged at the normal high multiplying power by the maximum charging current value, the charging safety problem of the battery can be guaranteed, and the charging efficiency of the battery is improved.
Optionally, in another embodiment based on the above method of the present application, determining a maximum charging current value corresponding to the remaining current value based on the preset current data set includes: obtaining a maximum temperature value and a minimum temperature value which are reached by the battery in a target time range; based on the current data set, a maximum charging current value corresponding to the remaining power value, the maximum temperature value, and the minimum temperature value is determined.
In one mode, the embodiment of the application can select the maximum charging current value matched with the current data set according to the preset current data set, the actual residual current value, the maximum/minimum temperature value achieved by combining the battery and other indexes. And taking the selected maximum charging current value as the actual charging current of the battery.
By applying the technical scheme, after the true residual electric quantity value matched with the maximum and minimum dynamic voltage is determined, the corresponding maximum charging current value is accurately matched based on the current true SOC state of the battery and the maximum and minimum temperature reached by the battery in the charging process based on the pre-generated current data set, so that the battery is charged at normal high multiplying power by the maximum charging current value, the charging safety problem of the battery can be guaranteed, and the charging efficiency of the battery is improved.
Optionally, in another embodiment based on the above method of the present application, charging the battery based on the maximum charging current value includes: obtaining a maximum output current value of a charging device for charging a battery; and if the maximum charging current value is less than or equal to the maximum output current value, charging the battery with the maximum charging current value. And if the maximum charging current value is determined to be larger than the maximum output current value, charging the battery at the maximum output current value.
By applying the technical scheme, after the corresponding maximum charging current value is accurately matched based on the current real SOC state of the battery and the maximum and minimum temperature reached by the battery in the charging process, the maximum charging current value is compared with the maximum output current value reached by the charging pile. To ensure that the battery is charged at a smaller value of the maximum charging current value and the maximum output current value. Therefore, the charging safety problem of the battery can be guaranteed, and the charging efficiency of the battery is improved.
In one embodiment, as shown in fig. 3, a method for charging a battery is described by taking an electric device as an automobile and a charging device as a charging pile as an example:
Step 1, inserting a gun into a charging pile window by a user so as to enable the charging pile and a whole vehicle to complete information interaction, enabling the whole vehicle and a Battery Management System (BMS) to complete internal communication, and enabling the battery management system to acquire information such as a maximum output current value of the charging pile according to the charging pile interaction information;
step 2, when the battery management system detects that the battery is in a charging state, firstly charging the battery by using a small-rate current (namely a first charging current value) for 100 seconds (namely a first time period);
step 3, after 100 seconds of charging, the battery management system reversely detects the residual electric quantity SOC value corresponding to the current maximum dynamic voltage and the current minimum dynamic voltage according to the maximum dynamic voltage and the minimum dynamic voltage value which are obtained by the battery in 101 seconds-110 seconds and according to the corresponding relation between the preset small-multiplying power charging SOC and the voltage (the corresponding relation is obtained by actually testing the circuit data, namely, the SOC data set);
step 4, the battery management system can accurately position the SOC state of the current battery according to the reversely-detected SOC value, and execute a relation table of SOC and charging current under the preset high-rate charging according to the reversely-detected SOC value and the maximum/minimum temperature value reached by the battery in 101-110 seconds (the relation table is also obtained by actually testing the battery data, namely, a current data set), so as to determine the actual maximum charging current capacity (namely, the maximum charging current value) of the current battery;
And 5, comparing the maximum charging current value determined in the step 4 with the maximum output current value sent to the whole vehicle by the charging pile, and selecting the charging current value with smaller value as a high-rate charging current value.
And 6, according to the high-rate charging current value and the current SOC state determined in the step 5, continuing charging according to a normal table lookup charging process in the charging process until the maximum monomer voltage value in the Pack is detected to be larger than the full charge cut-off voltage, and after a period of time, determining that the battery is full, and ending the charging process.
By applying the technical scheme, in the initial charging process, the electric device is charged for a period of time by the small-rate current, and the real residual electric quantity value matched with the current voltage value is determined through the corresponding relationship between the state of charge (SOC) of the battery and the voltage under the pre-generated small-rate charging. And further, the problem of inaccurate calculation of the residual electric quantity value caused by different states of the electric devices in the related art is avoided. And also ensures the safety problem of the battery in the charging process.
Optionally, in another embodiment of the present application, as shown in fig. 4, the present application further provides a charging device for a battery. Wherein, include:
A detection module 201 configured as a detection module configured to continuously charge the battery with a first charging current value and detect a voltage value of the battery within a target time range after a first period of charging;
a determination module 202 is configured to determine a current remaining electrical energy value of the battery from the voltage value.
In the technical scheme of the embodiment of the application, after a charging start instruction is detected, the battery is continuously charged by a first charging current value, and the voltage value of the battery in a target time range after a first charging time period is detected; and determining the current residual electric quantity value of the battery according to the voltage value. By applying the technical scheme, in the initial charging process, the electric device is charged for a period of time by the small-rate current, and the real residual electric quantity value matched with the current voltage value is determined through the corresponding relationship between the state of charge (SOC) of the battery and the voltage under the pre-generated small-rate charging. And further, the problem of inaccurate calculation of the residual electric quantity value caused by different states of the electric devices in the related art is avoided. And also ensures the safety problem of the battery in the charging process.
In another embodiment of the present application, the determining module 202 is configured to:
and selecting a residual electric quantity value matched with the voltage value of the battery in the target time range from a preset SOC data set.
In another embodiment of the present application, the detection module 201 is configured to:
acquiring attribute parameters of the battery cells;
and selecting the first current value and the first time period matched with the attribute parameters based on a preset attribute data set.
In another embodiment of the present application, the detection module 201 is configured to:
taking any time period after the battery is charged for a first time period as the target time range;
and detecting the maximum dynamic voltage value and the minimum dynamic voltage value reached by the battery within the target time range.
In another embodiment of the present application, the determining module 202 is configured to:
and determining the residual electric quantity value corresponding to the maximum dynamic voltage value and the minimum dynamic voltage value reached by the battery based on a preset SOC data set.
In another embodiment of the present application, the determining module 202 is configured to:
Determining a maximum charging current value corresponding to the residual electric quantity value based on a preset current data set, wherein the maximum charging current value is larger than the first charging current value;
and charging the battery based on the maximum charging current value.
In another embodiment of the present application, the determining module 202 is configured to:
obtaining a maximum temperature value and a minimum temperature value which are reached by the battery in the target time range;
based on the current data set, the maximum charging current value corresponding to the remaining power value, the maximum temperature value, and the minimum temperature value is determined.
In another embodiment of the present application, the determining module 202 is configured to:
obtaining a maximum output current value of a charging device for charging the battery;
and if the maximum charging current value is less than or equal to the maximum output current value, charging the battery by using the maximum charging current value.
And if the maximum charging current value is determined to be larger than the maximum output current value, charging the battery at the maximum output current value.
FIG. 5 is a block diagram of the logical structure of a computing device, according to an example embodiment. For example, the computing device 300 may be a computing device provided inside the power consumption device, such as a BMS, an in-vehicle controller, a motor controller, a domain controller, or the like.
In an exemplary embodiment, there is also provided a non-transitory computer readable storage medium including instructions, such as a memory including instructions, executable by a battery processor to perform a method of charging a battery as described above, the method comprising: continuously charging the battery with a first charging current value, and detecting a voltage value of the battery within a target time range after a first charging period; and determining the current residual electric quantity value of the battery according to the voltage value. Optionally, the above instructions may also be executed by a processor of the battery to perform other steps involved in the above exemplary embodiments. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
In an exemplary embodiment, there is also provided an application/computer program product comprising one or more instructions executable by a processor of a battery to perform a method of charging the battery, the method comprising: continuously charging the battery with a first charging current value, and detecting a voltage value of the battery within a target time range after a first charging period; and determining the current residual electric quantity value of the battery according to the voltage value. Optionally, the above instructions may also be executed by a processor of the battery to perform other steps involved in the above exemplary embodiments.
Fig. 5 is an exemplary diagram of a computing device 300. It will be appreciated by those skilled in the art that the schematic diagram 5 is merely an example of the computing apparatus 300 and is not limiting of the computing apparatus 300, and may include more or fewer components than shown, or may combine certain components, or different components, e.g., the computing apparatus 300 may further include input-output devices, network access devices, buses, etc.
The processor 302 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor 302 may be any conventional processor or the like, the processor 302 being the control center of the computing device 300, with various interfaces and lines connecting the various parts of the overall computing device 300.
The memory 301 may be used to store computer readable instructions 303 and the processor 302 implements the various functions of the computing device 300 by executing or executing computer readable instructions or modules stored within the memory 301 and invoking data stored within the memory 301. The memory 301 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data created according to the use of the computing device 300, etc. In addition, the Memory 301 may include a hard disk, a Memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card), at least one magnetic disk storage device, a Flash Memory device, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), or other nonvolatile/volatile storage device.
The modules integrated by the computing device 300, if implemented as software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the present invention implements all or part of the flow of the method of the above-described embodiments, and computer readable instructions, which may also be implemented by means of hardware associated with the instructions of the computer readable instructions, may be stored in a computer readable storage medium, which when executed by a processor, implement the steps of the various method embodiments described above.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (11)
- A method of charging a battery, comprising:continuously charging the battery with a first charging current value, and detecting a voltage value of the battery within a target time range after a first charging period;and determining the current residual electric quantity value of the battery according to the voltage value.
- The method of claim 1, wherein said determining a current remaining electrical power value of said battery from said voltage value comprises:and selecting a residual electric quantity value matched with the voltage value of the battery in the target time range from a preset SOC data set.
- The method of claim 1 or 2, further comprising, prior to said continuously charging said battery at said first charge current value:acquiring attribute parameters of the battery cells;and selecting the first current value and the first time period matched with the attribute parameters based on a preset attribute data set.
- The method of claim 1, wherein detecting the voltage value of the battery within a target time range after the first period of charging comprises:taking any time period after the battery is charged for a first time period as the target time range;And detecting the maximum dynamic voltage value and the minimum dynamic voltage value reached by the battery within the target time range.
- The method of claim 1 or 4, wherein said determining a current remaining electrical power value of said battery from said voltage value comprises:and determining the residual electric quantity value corresponding to the maximum dynamic voltage value and the minimum dynamic voltage value reached by the battery based on a preset SOC data set.
- The method of claim 1, further comprising, after determining the current remaining power value of the battery based on the voltage value:determining a maximum charging current value corresponding to the residual electric quantity value based on a preset current data set, wherein the maximum charging current value is larger than the first charging current value;and charging the battery based on the maximum charging current value.
- The method of claim 6, wherein determining a maximum charge current value corresponding to the remaining capacity value based on a preset current data set comprises:obtaining a maximum temperature value and a minimum temperature value which are reached by the battery in the target time range;Based on the current data set, the maximum charging current value corresponding to the remaining power value, the maximum temperature value, and the minimum temperature value is determined.
- The method of claim 6 or 7, wherein the charging the battery based on the maximum charging current value comprises:obtaining a maximum output current value of a charging device for charging the battery;and if the maximum charging current value is less than or equal to the maximum output current value, charging the battery by using the maximum charging current value.And if the maximum charging current value is determined to be larger than the maximum output current value, charging the battery at the maximum output current value.
- A charging device for a battery, comprising:a detection module configured to continuously charge the battery with a first charge current value and detect a voltage value of the battery within a target time range after a first period of charging;and the determining module is configured to determine the current residual electric quantity value of the battery according to the voltage value.
- A computing device, comprising:A memory for storing executable instructions; the method comprises the steps of,a processor for executing the executable instructions with the memory to perform the operations of the method of charging a battery of any one of claims 1-8.
- A computer readable storage medium storing computer readable instructions, wherein the instructions when executed perform the operations of the method of charging a battery of any one of claims 1-8.
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2022/100813 WO2023245555A1 (en) | 2022-06-23 | 2022-06-23 | Calculation device and charging method and device for battery thereof, and medium |
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| JPH0898426A (en) * | 1994-09-21 | 1996-04-12 | Toyota Motor Corp | Battery charging method |
| JP2000078757A (en) * | 1998-08-26 | 2000-03-14 | Toshiba Battery Co Ltd | Charged state managing apparatus for secondary battery |
| CN101340011B (en) * | 2008-08-07 | 2010-12-08 | 中兴通讯股份有限公司 | Intelligent charging method and apparatus |
| CN102544607B (en) * | 2012-02-13 | 2014-08-13 | 北京海博思创科技有限公司 | Method and device for obtaining residual electricity value of lithium ion battery and battery system |
| CN106505695B (en) * | 2016-12-30 | 2019-04-16 | Oppo广东移动通信有限公司 | A kind of charge control method, device and terminal |
| CN109672000A (en) * | 2019-02-19 | 2019-04-23 | 惠州亿纬锂能股份有限公司 | Charging method, device, equipment and the storage medium of lithium battery |
| CN111969672A (en) * | 2020-07-14 | 2020-11-20 | 浙江零跑科技有限公司 | Battery charging method and battery charging current calculating device |
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