WO2023097547A1 - 电池加热方法、装置、设备及存储介质 - Google Patents
电池加热方法、装置、设备及存储介质 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 93
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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
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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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
- H01M10/443—Methods for charging or discharging in response to temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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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
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- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
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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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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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
Definitions
- the present application relates to the field of battery technology, in particular to a battery heating method, device, equipment and storage medium.
- lithium batteries and other types of batteries are usually heated to a higher temperature when they are in a low-temperature working environment to improve their working performance.
- the battery is usually heated according to fixed heating parameters, which has the problem of low heating rate.
- the present application provides a battery heating method, device, equipment and storage medium to solve the problem of low battery heating rate in the related art.
- the present application provides a battery heating method, including:
- the first data table includes the first temperature, the first state of charge, and the first current amplitude under the condition of the first current amplitude Correspondence between current frequencies;
- the battery is heated based on the first current magnitude and the first current frequency.
- the battery heating method provided in the embodiment of the present application obtains the first temperature and the first state of charge of the battery, and determines the first current frequency according to the first temperature, the first state of charge, and the first preset data table, and based on the first A current amplitude and a first current frequency heat the battery, wherein the first data table includes a correspondence relationship between a first temperature, a first state of charge, and a first current frequency under the condition of the first current amplitude.
- the embodiment of the present application can determine the current frequency and amplitude for internal heating according to the temperature of the battery, and increase the heating rate of the battery under various temperature environments.
- the first current amplitude is predetermined, when determining the heating parameter of the battery, the consumption of computing resources caused by the determination of the first current amplitude can be saved, and the efficiency of determining the heating parameter of the battery can be improved. Moreover, there is no need to establish the above-mentioned first data tables for various current amplitudes, which helps to reduce the consumption of manpower and material resources caused by the establishment of the first data tables. By determining the first current amplitude, it is possible to avoid the situation that the current amplitude used for actually heating the battery is too high due to the lack of limitation on the current amplitude used to heat the battery, resulting in lithium deposition in the battery cell.
- the number of the first data tables is N, and the N first data tables are associated with N battery health degrees, where N is an integer greater than 1;
- the first current frequency is determined, including:
- a first current frequency is determined according to the first temperature, the first state of charge and the second data table.
- taking the SOH into consideration as a safety redundancy can further improve the reliability of the battery heating process.
- heating the battery based on the first current magnitude and the first current frequency includes:
- the method further includes:
- the battery is heated in different heating cycles.
- the current frequency for heating the battery is adjusted according to the first temperature of the battery, which helps to effectively improve the safety and efficiency of battery heating.
- the method further includes:
- the third current frequency is determined according to the second current amplitude, and the third current frequency is a safe current frequency for heating the battery under the second current amplitude condition;
- the battery is heated according to the greater of the first current frequency and the third current frequency, and the second current magnitude.
- This embodiment can effectively guarantee the safety of the battery heating process under various current amplitude conditions.
- the present application provides a battery heating method, including:
- the third data table includes the second temperature, the second state of charge, and the second current frequency under the condition of the fourth current frequency Correspondence between the three current amplitudes;
- the battery is heated based on the fourth current frequency and the third current magnitude.
- the battery heating method provided in the embodiment of the present application obtains the second temperature and the second state of charge of the battery, and determines the third current amplitude according to the second temperature, the second state of charge and the preset third data table, based on The battery is heated by the fourth current frequency and the third current amplitude, wherein the third data table includes the correspondence between the second temperature, the second state of charge and the third current amplitude under the condition of the fourth current frequency.
- the embodiment of the present application can determine the current frequency and amplitude for internal heating according to the temperature of the battery, so as to increase the heating rate of the battery under various temperature environments.
- the fourth current frequency is predetermined, when determining the heating parameter of the battery, the consumption of computing resources caused by the determination of the fourth current frequency can be saved, and the efficiency of determining the heating parameter of the battery can be improved. Moreover, there is no need to establish the above-mentioned third data tables for various current frequencies, which helps to reduce the consumption of manpower and material resources caused by the establishment of the third data tables. By determining the first current frequency, it is possible to avoid the situation that the frequency of the current actually used for heating the battery is too high due to the lack of frequency for the amplitude of the current used for heating the battery.
- the method further includes:
- heating the battery based on the fourth current frequency and the third current magnitude comprising:
- the fifth current frequency is greater than the fourth current frequency.
- This embodiment can balance the safety and heating efficiency of the battery heating process.
- the third current magnitude is a forward current magnitude
- heating the battery based on the fourth current frequency and the third current magnitude comprising:
- the battery is heated based on the fourth current frequency, the third current magnitude and the preset first negative current magnitude.
- This embodiment helps to reduce the calculation amount when determining the heating parameters, and at the same time helps to ensure the safety of the battery heating process.
- the method further includes:
- Heating the battery based on the fourth current frequency, the third current magnitude and the preset first negative current magnitude specifically includes:
- the first negative current amplitude is greater than the second negative current amplitude.
- This embodiment can avoid safety problems caused by over-discharge of the battery, thereby helping to improve the service life of the battery.
- the number of the third data tables is M, and the M third data tables are associated with M battery health degrees, where M is an integer greater than 1;
- the second state of charge and the preset third data table determine the third current amplitude, including:
- a third current magnitude is determined according to the second temperature, the second state of charge, and the fourth data table.
- taking the SOH into consideration as a safety redundancy can further improve the reliability of the battery heating process.
- heating the battery based on the fourth current frequency and the third current magnitude includes:
- the method further includes:
- the battery is heated in different heating cycles.
- the current amplitude for heating the battery is adjusted according to the second temperature of the battery, which helps to effectively improve the safety and efficiency of battery heating.
- the present application provides a battery heating device, including:
- a first acquiring module configured to acquire a first temperature and a first state of charge of the battery
- the first determining module is configured to determine the first current frequency according to the first temperature, the first state of charge, and a preset first data table.
- the first data table includes, under the first current amplitude condition, the first temperature, a corresponding relationship between the first state of charge and the first current frequency;
- the first heating control module is used for heating the battery based on the first current amplitude and the first current frequency.
- the present application provides a battery heating device, including:
- a second acquisition module configured to acquire a second temperature and a second state of charge of the battery
- the second determination module is configured to determine the third current amplitude according to the second temperature, the second state of charge, and a preset third data table, and the third data table includes the second temperature, a correspondence relationship between the second state of charge and the third current amplitude;
- the second heating control module is used for heating the battery based on the fourth current frequency and the third current amplitude.
- the present application provides an electronic device, including: a processor and a memory storing computer program instructions;
- the battery heating method as shown in the first aspect is realized, or the battery heating method as shown in the second aspect is realized.
- the present application provides a computer storage medium, on which computer program instructions are stored.
- the battery heating method as shown in the first aspect is realized, or the battery heating method as described in the second aspect is realized.
- Fig. 1 is the schematic diagram of lithium-ion battery equivalent circuit
- Figure 2 is a schematic diagram of the maximum amplitude-frequency relationship of the lithium-ion battery AC current at different temperatures under the condition of inhibiting lithium analysis;
- Fig. 3 is a schematic diagram of the maximum heat production power of alternating current preheating at different temperatures and frequencies under the condition of suppressing lithium analysis
- Fig. 4 is a schematic diagram of the selection of the optimal frequency point when the amplitude of the alternating current is given;
- Fig. 5 is a schematic flowchart of a battery heating method disclosed in an embodiment of the present application.
- Figure 6 is an example diagram of the battery heating process
- Fig. 7 is a schematic flowchart of a battery heating method disclosed in another embodiment of the present application.
- Fig. 8 is another example diagram of the battery heating process
- Fig. 9 is a structural schematic diagram of a heating system for heating the battery
- Fig. 10 is another structural schematic diagram of the heating system for heating the battery
- Fig. 11 is a schematic structural diagram of a battery heating device disclosed in an embodiment of the present application.
- Fig. 12 is a schematic structural view of a battery heating device disclosed in another embodiment of the present application.
- Fig. 13 is a schematic structural diagram of an electronic device disclosed in an embodiment of the present application.
- the working environment has a greater impact on their working performance.
- the lithium power battery of the lithium battery in the electric vehicle Take the lithium power battery of the lithium battery in the electric vehicle as an example.
- the electric vehicle When the electric vehicle is started in a low temperature environment, the electric vehicle may not be able to start or run normally due to the decline in the performance of the lithium power battery at low temperature.
- lithium batteries but also other types of batteries, such as sodium-ion batteries or magnesium-ion batteries, may also require heating.
- external heating there are two main ways to heat the battery: external heating and internal heating.
- the method of external heating is mainly realized by heat conduction or heat convection, and the battery is heated externally through PTC material or heating film.
- this method is prone to uneven heating and has low heating efficiency.
- Internal heating Since the heat is generated directly inside the battery, it is more energy efficient and more evenly heated.
- the battery can be heated internally by direct current (hereinafter referred to as direct current internal heating), which can avoid the introduction of circuit components to realize functions such as inverter, which is relatively low in cost, but causes a large energy loss of the battery. And too much DC will have a certain impact on battery life.
- direct current internal heating direct current internal heating
- AC internal heating is easier to implement, and the battery heating speed is faster and the heating uniformity is better.
- the following will mainly take the lithium battery as an example for illustration.
- FIG. 1 is a schematic diagram of an equivalent circuit of a lithium-ion battery. Based on the equivalent circuit, it can be seen that the impedance of a lithium-ion battery is mainly composed of three parts Z1, Z2 and Z3.
- Z1 is the ohmic impedance component R 0 of the internal current collector, active material, electrolyte, etc. of the lithium-ion battery.
- Z2 is the impedance component corresponding to the solid electrolyte interphase (SEI) film on the particle surface, specifically including capacitive impedance Q SEI and ohmic impedance R SEI .
- Z3 includes the electric double layer capacitance Q dl at the solid-liquid phase interface of the active material, the charge transfer impedance R ct and the impedance W corresponding to the diffusion process of lithium ions.
- lithium battery When a lithium battery is polarized, it may cause lithium to be deposited on the negative electrode. Specifically, during the charging process of lithium-ion batteries, lithium ions will be intercalated from the positive electrode to the negative electrode. However, when some abnormal conditions occur and the lithium ions deintercalated from the positive electrode cannot be inserted into the negative electrode, then the lithium ions can only be precipitated on the surface of the negative electrode, thus forming a layer of gray matter.
- Lithium analysis not only reduces the performance of the battery, greatly shortens the cycle life, but also limits the fast charging capacity of the battery, and may cause catastrophic consequences such as combustion and explosion.
- ⁇ s is the solid phase potential of the surface of the negative electrode particles
- ⁇ l is the liquid phase potential of the surface of the negative electrode particles
- U e,2 is the equilibrium potential of the lithium analysis reaction, which is usually considered to be 0V.
- lithium ions need to obtain electrons to be reduced to lithium metal. It is generally believed that the lithium analysis reaction initially occurs inside the SEI film on the surface of graphite particles, and the lithium intercalation reaction overpotential ⁇ at this place is:
- U e,1 is the equilibrium potential of the graphite negative electrode at a specific state of charge (State of Charge, SOC).
- the lithium intercalation reaction overpotential can be approximated as:
- I ct is the Faraday current
- R ct is the charge transfer impedance
- the sign of I ct is negative when charging.
- the equivalent circuit corresponding to the graphite negative electrode has the following relationship:
- V 3 is the voltage at both ends of the charge transfer impedance R ct , that is, the voltage at both ends of the impedance Z3 part in the equivalent circuit shown in Fig. 1 .
- the impedance of the impedance Z3 part in the equivalent circuit is related to the current frequency, and the expression is:
- Z 3 is the impedance of the impedance Z3 part
- j is the imaginary number unit
- ⁇ is the current frequency
- n dl is the constant phase angle element (Constant Phase Angle Element, CPE) index of the impedance Z3 part
- Q dl is the CPE of the impedance Z3 part coefficient.
- the voltage amplitude at both ends of the impedance Z3 part (the voltage amplitude at both ends of the charge transfer impedance R ct ) in the equivalent circuit of the graphite negative electrode of the lithium-ion battery is always smaller than the equilibrium potential of the graphite negative electrode.
- the real and imaginary parts of the positive and negative impedances increase significantly; the real parts of the positive and negative impedances decrease as the frequency increases.
- the equivalent circuit parameters of the negative electrode obtained from the fitting can be calculated to obtain the maximum amplitude of the AC heating current with different frequencies at different temperatures under the condition of inhibiting lithium precipitation, that is, at different temperatures
- the maximum amplitude-frequency relationship of the AC current of the lithium-ion battery, the amplitude-frequency relationship can be seen in Figure 2.
- Figure 3 is a schematic diagram of the maximum heat generation power of AC current preheating at different temperatures and frequencies under the condition of suppressing lithium precipitation. Ideally, by increasing the frequency, the current through R ct decreases, the voltage becomes smaller to avoid lithium deposition, and at the same time, the total current is larger, and greater heat is generated through R 0 .
- FIG. 4 is a schematic diagram of the selection of the optimal frequency point when the amplitude of the alternating current is given. Based on Figure 4, it can be seen that at the boundary of the shaded part, the maximum heat generation power under the condition that the battery does not decompose lithium can be obtained, which is the optimal frequency point. By selecting the appropriate current amplitude and frequency, the heating efficiency can be maximized.
- the current amplitude and frequency for internal heating of the lithium battery are usually determined based on the lowest design temperature of the lithium battery, and in subsequent applications, the current amplitude and frequency are fixedly used to heat the lithium battery , In this way, it is difficult to realize efficient heating of lithium batteries in various environments.
- a battery heating method is provided, as shown in FIG. 5 , the method includes:
- Step 501 acquiring the first temperature and the first state of charge of the battery
- Step 502 determine the first current frequency according to the first temperature, the first state of charge and the preset first data table, the first data table includes the first temperature, the first charge a corresponding relationship between the state and the first current frequency;
- Step 503 heating the battery based on the first current amplitude and the first current frequency.
- the battery may be a lithium-ion battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, etc., which are not specifically limited here. To simplify the description, the following description will mainly be made with the battery being a lithium-ion battery.
- the first temperature of the battery may refer to a battery problem collected in real time, which may be collected through a related temperature sensing device.
- the first temperature may be the temperature in the battery pack where the battery is located, or the temperature of the working environment where the battery is located.
- the first state of charge may be the real-time SOC of the battery, which may be collected by a battery SOC signal collection device.
- the first temperature and the first state of charge may be collected by a battery management system (Battery Management System, BMS) or the like.
- BMS Battery Management System
- the first data table can be pre-built.
- the current amplitude can be controlled, the battery temperature and battery SOC can be changed, and the electrochemical impedance spectrum (Electrochemical Impedance Spectroscopy, EIS) of the battery can be obtained under the combined conditions of each battery temperature and battery SOC data.
- EIS Electrochemical Impedance Spectroscopy
- the current frequency at any combination of battery temperature and battery SOC can be determined.
- the current frequency can make the battery not polarized under the combined conditions of the corresponding battery temperature and battery SOC, and at the same time, the internal heating of the battery can be performed with a relatively high heating power.
- the current amplitude can be used as a fixed quantity
- the battery temperature and battery SOC can be used as independent variables
- the current frequency can be measured as a dependent variable.
- the current amplitude in the first data table is specifically controlled at the first current amplitude.
- the first current amplitude may be determined according to the rated current or the maximum allowable current of the discharge device.
- the discharge device may be a motor controller, charging pile or other energy storage unit, and the first current amplitude may be equal to or slightly smaller than the maximum allowable current of the discharge device.
- the first data table may include correspondences among the first temperature, the first state of charge, and the first current frequency under the first current amplitude condition. When the first temperature and the first state of charge are obtained, the first current frequency can be determined through the first data table.
- the battery may be heated based on the first current magnitude and the first current frequency.
- the first current amplitude and the first current frequency may be target heating parameters or reference heating parameters.
- the battery may be heated with the first current amplitude and the first current frequency, or the battery may be heated with the first current frequency and a current amplitude lower than the first current amplitude.
- the battery heating method provided in the embodiment of the present application obtains the first temperature and the first state of charge of the battery, and determines the first current frequency according to the first temperature, the first state of charge, and the first preset data table, and based on the first A current amplitude and a first current frequency heat the battery, wherein the first data table includes a correspondence relationship between a first temperature, a first state of charge, and a first current frequency under the condition of the first current amplitude.
- the embodiment of the present application can determine the current frequency and amplitude for internal heating according to the temperature of the battery, so as to increase the heating rate of the battery under various temperature environments.
- the first current amplitude is predetermined, when determining the heating parameters of the battery, the consumption of computing resources caused by the determination of the first current amplitude can be saved, and the battery can be improved. The efficiency of the determination of the heating parameters. Moreover, there is no need to establish the above-mentioned first data tables for various current amplitudes, which helps to reduce the consumption of manpower and material resources caused by the establishment of the first data tables.
- the lack of limitation on the current amplitude used to heat the battery can avoid the situation that the current amplitude used for actually heating the battery is too high, resulting in lithium deposition in the battery cell.
- the first data table is established under the condition of the first current amplitude, and there is no need to establish the correspondence between the battery temperature, battery SOC, and current frequency for multiple current amplitudes, and then It also helps to reduce the manpower and material resources required for the process of establishing these correspondences.
- the first current amplitude may be determined first. Taking the application of batteries in electric vehicles as an example, the selection of the first current amplitude is related to the maximum overcurrent capacity of the heating system. If self-discharge is performed through the electric vehicle motor controller, the first current amplitude is generally the electric control of the motor. For the maximum overcurrent, if the charging pile is heated by a fast-heating charging pile, the first current amplitude is generally selected as the maximum overcurrent capability of the charging pile. Generally speaking, the first current amplitude is the maximum current amplitude that can be achieved under rapid heating conditions, and at the same time, it will not cause safety risks to the heating system. The first current amplitude is generally determined at the beginning of the system design up.
- the first current amplitude may be 300A
- the safe current frequency of the battery when the SOC is 0% to 100% and the temperature is -30° to 10° may be calibrated respectively, and the safe current frequency may be based on the formula ( 2) and (4) are determined.
- the obtained optimal frequency point should not be lower than the corresponding safe current frequency.
- the first data table can be obtained based on the calibration test, and the following is an example of the first data table.
- each data in the above first data table is an exemplary description.
- "XHz” represents a frequency value.
- the specific value represented by “X” in each table can be obtained through calibration tests, rather than a specific value. That is to say, the value of "X” in different tables can be same or different.
- the number of the first data tables is N, and the N first data tables are associated with N battery health degrees (State Of Health, SOH), and N is an integer greater than 1;
- the first current frequency is determined, specifically including:
- a first current frequency is determined according to the first temperature, the first state of charge and the second data table.
- Battery SOH can be understood as the percentage of the battery's current capacity to the factory capacity.
- the same battery may have different charge transfer resistance R ct in different SOH states.
- corresponding first data tables can be respectively established for the N SOHs.
- the method for establishing the first data table will not be described here.
- the first health degree of the battery can be understood as the current SOH of the battery, and in some examples, the first health degree of the battery can be obtained through a BMS.
- the second data table associated with the first health degree may be determined from the N first data tables.
- the second data table is the first data table associated with the first health degree among the N first data tables. Therefore, the second data table may also include the corresponding relationship among the first temperature, the first state of charge and the first current frequency under the condition of the first current amplitude.
- the first current frequency is determined according to the first temperature, the first state of charge, and the second data table.
- the first current frequency may correspond to the heating parameter of the above-mentioned battery, and the specific application will not be repeated here.
- the impedance of the battery will increase.
- taking the SOH into consideration as a safety redundancy can further improve the reliability of the battery heating process.
- heating the battery based on the first current amplitude and the first current frequency includes:
- the method further includes:
- the battery is heated in divided heating cycles.
- the above steps 501 to 503 may be performed, and the battery is kept heated for a first preset time period.
- the first preset duration may be preset, and the specific value may not be limited here.
- step 501 to step 503 are repeatedly performed, and the battery is kept heating for the first preset time period again.
- FIG. 6 is an example diagram of the battery heating process in this embodiment.
- the abscissa is time
- the ordinate is battery temperature.
- Fig. 6 shows the time period of three heating cycles on the time axis, and these three heating cycles are recorded as heating cycle A, heating cycle B and heating cycle C respectively, and the first current frequency adopted in each heating cycle is respectively the first current frequency A frequency, a second frequency and a third frequency.
- the first temperature of the battery will change, therefore, the first current frequency determined based on the first temperature and the first data table will usually also change accordingly, that is, the first frequency, the second frequency and The third frequency can generally be unequal.
- the first data table is established based on the consideration of safe heating of the battery and maximization of heating efficiency.
- the battery is heated in different heating cycles.
- the current frequency used to heat the battery helps to effectively improve the safety and efficiency of battery heating.
- the heating of the battery may be ended.
- the waveform of the current for heating the battery may be one of pulse wave, square wave, triangular wave, single-frequency sine wave or superposition of multiple frequency sine waves. That is, in practical applications, there may be differences in the waveform type of the current heating the battery.
- the first current frequency is obtained by querying the first data table, and the first data table is often established based on a current condition of a certain waveform type.
- the waveform type of the current used may be a single-frequency sine wave.
- the waveform type of the current used when creating the first data table can be used as the reference waveform.
- the waveform type of the current used for heating the battery may be a pulse wave or a triangular wave.
- the impact of these waveform types on the lithium analysis of the battery is often difficult to determine.
- the first current frequency can be determined according to the waveform type of the current used to heat the battery. A current frequency is adjusted to obtain a second current frequency.
- the adjustment rule of the first current frequency can be set as required. For example, if the waveform type of the current used for heating the battery is the above-mentioned reference waveform, the first current frequency can be directly used as the second current frequency; and if the waveform type of the current used for heating the battery is part of the reference waveform, then the The first current frequency is added to the preset frequency, or multiplied by a preset coefficient to obtain the second current frequency.
- each waveform type may correspond to a preset frequency adjustment value or adjustment coefficient.
- the frequency adjustment value corresponding to the waveform type can be added to the first current frequency, or multiplied by the adjustment coefficient corresponding to the waveform type to obtain the second Second current frequency.
- the first current frequency determined according to the first data table can be adjusted according to the waveform type of the current for heating the battery to obtain the second current frequency, and the battery can be heated based on the first current amplitude and the second current frequency , which helps to improve the safety of the battery heating process.
- the method further includes:
- a third current frequency is determined according to the second current amplitude, and the third current frequency is a safe current frequency for heating the battery under the condition of the second current amplitude;
- the battery is heated according to the greater of the first current frequency and the third current frequency, and the second current magnitude.
- the first current amplitude may be determined according to the maximum allowable current of the discharge device, and the first current amplitude may be regarded as an empirical value to a certain extent. However, in practical applications, different discharge devices may have different maximum allowable currents.
- the second current amplitude here may be the maximum allowable current of the discharge equipment used in practical applications, or a current amplitude determined according to the maximum allowable current of discharge equipment used in practical applications.
- a safe current frequency that is, the above-mentioned third current frequency, can actually be determined according to formulas (2) and (4). If the frequency of the current used for heating the battery is lower than the third current frequency, it may cause safety problems to the heating process.
- the battery can be heated according to the larger value between the first current frequency and the third current frequency and the second current amplitude. In this way, the safety of the battery heating process can be effectively guaranteed under various current amplitude conditions.
- the embodiment of the present application also provides a battery heating method, including:
- Step 701 acquiring a second temperature and a second state of charge of the battery
- Step 702 according to the second temperature, the second state of charge and the preset third data table, determine the third current amplitude, the third data table includes the second temperature, the second charge state under the condition of the fourth current frequency, a corresponding relationship between the state and the third current amplitude;
- Step 703 heating the battery based on the fourth current frequency and the third current amplitude.
- the battery may be a lithium-ion battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, etc., which are not specifically limited here.
- the following also mainly assumes that the battery is a lithium-ion battery for description.
- the second temperature of the battery may refer to a battery problem collected in real time, which may be collected through a related temperature sensing device.
- the second temperature may be the temperature in the battery pack where the battery is located, or the temperature of the working environment where the battery is located.
- the second state of charge may be the real-time SOC of the battery, which may be collected by a battery SOC signal collection device.
- the second temperature and the second state of charge may be collected by a BMS or the like.
- the third data table can be pre-built.
- the current frequency can be controlled, the battery temperature and battery SOC can be changed, and the EIS data of the battery under each combination of battery temperature and battery SOC can be obtained.
- the current magnitude at any combination of battery temperature and battery SOC can be determined.
- the current amplitude can make the battery not polarized under the combined conditions of the corresponding battery temperature and battery SOC, and at the same time, the internal heating of the battery can be performed with a relatively high heating power.
- the current frequency can be used as a fixed quantity
- the battery temperature and battery SOC can be used as independent variables
- the current amplitude can be measured as a dependent variable.
- the current frequency in the third data table is specifically controlled at the fourth current frequency.
- the third data table may include a correspondence between the second temperature, the second state of charge, and the third current amplitude under the fourth current frequency condition.
- the third current amplitude can be determined through the third data table.
- the battery can be heated based on the fourth current frequency and the third current magnitude.
- the fourth current frequency and the third current amplitude may be target heating parameters or reference heating parameters.
- the battery may be heated with the fourth current frequency and the third current amplitude, or the battery may be heated with the third current amplitude and a current frequency higher than the fourth current frequency.
- the battery heating method provided in the embodiment of the present application obtains the second temperature and the second state of charge of the battery, and determines the third current amplitude according to the second temperature, the second state of charge and the preset third data table, based on The battery is heated by the fourth current frequency and the third current amplitude, wherein the third data table includes the correspondence between the second temperature, the second state of charge and the third current amplitude under the condition of the fourth current frequency.
- the embodiment of the present application can determine the current frequency and amplitude for internal heating according to the temperature of the battery, so as to increase the heating rate of the battery under various temperature environments.
- the fourth current frequency is predetermined, when determining the heating parameters of the battery, the consumption of computing resources caused by the determination of the fourth current frequency can be saved, and the heating of the battery can be improved. Parameter determination efficiency. Moreover, there is no need to establish the above-mentioned third data tables for various current frequencies, which helps to reduce the consumption of manpower and material resources caused by the establishment of the third data tables.
- the third data table is established under the condition of the fourth current frequency, and there is no need to establish the correspondence between the battery temperature, battery SOC, and current amplitude for multiple current frequencies, and there are also It helps to reduce the human and material resources required for the process of establishing these correspondences.
- the method further includes:
- heating the battery based on the fourth current frequency and the third current magnitude comprising:
- the fifth current frequency is greater than the fourth current frequency.
- the battery can supply power to the user equipment while being heated by the discharge device. Therefore, the battery has an output voltage, which can be obtained through a voltage sensing device or the like.
- the above-mentioned fourth current frequency may be a predetermined smaller frequency value. In the process of internal heating of the battery, if the output voltage of the battery is low, if the battery continues to discharge, it may cause the battery to drop below the safe voltage.
- the voltage threshold can be regarded as a threshold used to judge whether the battery is in a safe voltage range.
- a relatively high fifth current frequency may be used to internally heat the battery.
- the fifth current frequency can be set according to needs, specifically, it can be an empirical value, or it can be obtained through calibration of the charging and discharging process of the battery, which will not be described in detail here.
- the output voltage of the battery When the output voltage of the battery is greater than or equal to the voltage threshold, it can be considered to a certain extent that the output voltage of the battery does not drop below the safe voltage range during the discharge process. At this time, it can be based on the relatively low fourth current frequency and The third current amplitude heats the battery to ensure the heating efficiency of the battery.
- the battery when the output voltage is lower than the voltage threshold, after the battery is heated based on the preset fifth current frequency and the third current amplitude, when the second temperature of the battery rises to a preset temperature value, The battery may then be heated based on the fourth current frequency and the third current magnitude.
- the third current amplitude is specifically a forward current amplitude
- Heating the battery based on the fourth current frequency and the third current amplitude specifically includes:
- the battery is heated based on the fourth current frequency, the third current magnitude and the preset first negative current magnitude.
- the positive current may refer to the current when the battery is in a charging state
- the negative current may refer to the current when the battery is in a discharging state
- the third current amplitude that needs to be determined may be the forward current amplitude, and the battery is heated based on the third current amplitude and the fourth current frequency to avoid safety issues.
- the impact on the safety of the battery such as lithium is less, therefore, its amplitude can be determined as a preset value, that is, the above-mentioned first negative current amplitude.
- the first negative current amplitude may be the maximum allowable current amplitude of the electric device, and the maximum allowable current amplitude has been determined when the electric device is designed.
- the first negative current amplitude may also be an empirical value.
- the third current amplitude determined based on the third data table is specifically the forward current amplitude, and the battery is heated based on the fourth current frequency, the third current amplitude and the preset first negative current amplitude, It helps to improve the heating efficiency, and at the same time helps to ensure the safety of the battery heating process, and reduces the requirements on the frequency conversion range of the heating equipment. .
- the method further includes:
- Heating the battery based on the fourth current frequency, the third current magnitude and the preset first negative current magnitude specifically includes:
- the first negative current amplitude is greater than the second negative current amplitude.
- Whether the output voltage of the battery is low can be judged based on the comparison between the output voltage and the voltage threshold.
- the output voltage of the battery When the output voltage of the battery is greater than or equal to the voltage threshold, it can be considered to a certain extent that the output voltage of the battery does not drop below the safe voltage range during the discharge process. At this time, it can be based on the fourth current frequency and the third current amplitude. value and the preset first negative current amplitude to heat the battery, to ensure the heating efficiency of the battery and to ensure the normal use of electrical equipment.
- the battery when the output voltage is less than the voltage threshold, the battery is heated based on the fourth current frequency, the third current amplitude and the preset second negative current amplitude, the second negative current amplitude is smaller than the first A negative current amplitude to avoid safety issues caused by excessive battery discharge, which in turn helps to increase the service life of the battery.
- the number of the third data tables is M, and the M third data tables are associated with M battery health degrees, and M is an integer greater than 1;
- the second state of charge and the preset third data table determine the third current amplitude, including:
- a third current magnitude is determined according to the second temperature, the second state of charge, and the fourth data table.
- the same battery may have different charge transfer resistances R ct in different SOH states.
- R ct charge transfer resistances
- corresponding third data tables may be respectively established for the M SOHs.
- the method of establishing the third data table will not be repeated here.
- the second health level of the battery can be understood as the current SOH of the battery, and in some examples, the second health level of the battery can be acquired through a BMS.
- the fourth data table associated with the second health degree may be determined from the M third data tables.
- the fourth data table is the third data table associated with the second health degree among the N third data tables. Therefore, the fourth data table may also include the corresponding relationship among the second temperature, the second state of charge and the third current amplitude under the fourth current frequency condition.
- the third current amplitude is determined according to the second temperature, the second state of charge and the fourth data table.
- the third current amplitude may correspond to the above heating parameters of the battery, and the specific usage will not be repeated here.
- the impedance of the battery will increase.
- taking the SOH into consideration as a safety redundancy can further improve the reliability of the battery heating process.
- heating the battery based on the fourth current frequency and the third current amplitude comprises:
- the method further includes:
- the battery is heated in divided heating cycles.
- step 701 to step 703 may be performed, and the battery is kept heating for a second preset time period.
- the second preset duration may be preset, and the specific value may not be limited here.
- step 701 to step 703 are repeatedly performed, and the battery is kept heating for the second preset time period again.
- FIG. 8 is another example diagram of the heating process of the battery in this embodiment.
- the example diagram is located in the upper coordinate system, with time on the abscissa and battery temperature on the ordinate.
- FIG. 8 shows the time periods of three heating cycles on the time axis, which are respectively denoted as heating cycle A', heating cycle B' and heating cycle C'.
- the frequency of the current used in each heating cycle may be equal, but the amplitude of the current may be continuously varied.
- the abscissa is time
- the ordinate is current amplitude. It can be seen that the frequency of the current remains unchanged.
- the amplitude of the positive current can be continuously increased, while the amplitude of the negative current can be kept unchanged.
- the magnitude of the negative current can also be adjusted as the heating cycle progresses.
- the third data table is established based on the consideration of safe heating of the battery and maximization of heating efficiency.
- the battery is heated in different heating cycles.
- the current amplitude used to heat the battery helps to effectively improve the safety and efficiency of battery heating.
- the waveform of the current used for heating the battery is a square wave.
- the waveform type of the current used for heating the battery can be a pulse wave, square wave, triangle wave, single-frequency sine wave or a variety of At least one of the superposition of frequency sine waves and the like.
- the third current amplitude can also be adjusted according to the waveform type, and the battery can be heated based on the fourth current frequency and the adjusted third current amplitude.
- the current waveform used when establishing the third data table is a single-frequency sine wave
- the single-frequency sine wave may be called a reference waveform.
- the adjustment rule may include: when the waveform used for heating the battery is not a bit reference waveform, subtracting the preset current amplitude from the determined third current amplitude, or multiplying by a positive coefficient less than 1, etc.
- FIG. 9 is a schematic structural diagram of a heating system for heating a battery.
- the heating system may include a battery pack and a power supply.
- the battery pack can include a battery and a BMS, and the BMS includes various types of sensing units, such as current acquisition units, voltage acquisition units, and temperature acquisition units.
- the BMS may also include SOC signal acquisition equipment, SOH signal acquisition equipment, and the like.
- the power source can be a charging pile or a motor controller.
- BMS can collect data such as battery temperature and SOC, and generate relevant heating parameters based on these collected data, such as the above-mentioned current frequency and current amplitude.
- the heating parameters can be sent to the power supply through a communication module, such as a signal line, so as to control the power supply to heat the battery according to the heating parameters.
- FIG. 10 is a schematic structural diagram of another heating system for heating a battery.
- the heating system may include a battery pack, a voltage conversion module, and an energy storage unit.
- the energy storage unit may be a wind power energy storage unit or a solar energy storage unit.
- the energy storage unit may also be various electronic components used for energy storage in the electric vehicle.
- the voltage conversion module can be used to convert the voltage output by the energy storage unit.
- the BMS can communicate with the voltage variation module, and control the voltage variation module to work based on the determined heating parameters.
- the embodiment of the present application also provides a battery heating device 1100, including:
- the first determination module 1102 is configured to determine the first current frequency according to the first temperature, the first state of charge, and the preset first data table.
- the first data table includes the first temperature under the first current amplitude condition. , the corresponding relationship between the first state of charge and the first current frequency;
- the first heating control module 1103 is used for heating the battery based on the first current amplitude and the first current frequency.
- the number of first data tables is N, and the N first data tables are associated with N battery health degrees, where N is an integer greater than 1;
- the first determination module 1102 includes:
- a first acquiring unit configured to acquire a first health degree of the battery
- a first determining unit configured to determine a second data table associated with the first health degree from the N first data tables
- the second determination unit is configured to determine the first current frequency according to the first temperature, the first state of charge and the second data table.
- the first heating control module 1103 includes:
- a first heating control unit configured to start heating the battery at a first moment based on a first current amplitude and a first current frequency
- the battery heating device 1100 may further include:
- the first execution module is configured to return to the step of obtaining the first temperature and the first state of charge of the battery when the second moment is reached, and the duration between the second moment and the first moment is equal to the first preset duration .
- the battery heating device 1100 may further include:
- the third acquisition module is configured to determine the third current frequency according to the second current amplitude when the second current amplitude is acquired, and the third current frequency is the safety of heating the battery under the condition of the second current amplitude current frequency;
- the third heating control module is used for heating the battery according to the larger value between the first current frequency and the third current frequency and the second current amplitude.
- the embodiment of the present application also provides a battery heating device 1200, including:
- a second acquiring module 1201, configured to acquire a second temperature and a second state of charge of the battery
- the second determining module 1202 is configured to determine the third current amplitude according to the second temperature, the second state of charge, and the preset third data table.
- the third data table includes the condition of the fourth current frequency, the second temperature , the corresponding relationship between the second state of charge and the third current amplitude;
- the second heating control module 1203 is configured to heat the battery based on the fourth current frequency and the third current amplitude.
- the battery heating device 1200 may further include:
- the fourth obtaining module is used to obtain the output voltage of the battery
- the fourth heating control module is used to heat the battery based on the preset fifth current frequency and the third current amplitude when the output voltage is lower than the voltage threshold;
- the second heating control module 1203 can be used to heat the battery based on the fourth current frequency and the third current amplitude when the output voltage is greater than or equal to the voltage threshold;
- the fifth current frequency is greater than the fourth current frequency.
- the third current amplitude is a forward current amplitude
- the second heating control module 1203 includes:
- the second heating control unit is used for heating the battery based on the fourth current frequency, the third current amplitude and the preset first negative current amplitude.
- the battery heating device 1200 may further include:
- the fifth obtaining module is used to obtain the output voltage of the battery
- the fifth heating control module is used to heat the battery based on the fourth current frequency, the third current amplitude and the preset second negative current amplitude when the output voltage is less than the voltage threshold;
- the second heating control module 1203 is configured to heat the battery based on the fourth current frequency, the third current amplitude and the preset first negative current amplitude when the output voltage is greater than or equal to the voltage threshold;
- the first negative current amplitude is greater than the second negative current amplitude.
- the number of the third data tables is M, and the M third data tables are associated with M battery health degrees, and M is an integer greater than 1;
- the second determination module 1202 includes:
- a second acquiring unit configured to acquire a second health degree of the battery
- a third determining unit configured to determine a fourth data table associated with the second health degree from the M third data tables
- the fourth determining unit is configured to determine the third current amplitude according to the second temperature, the second state of charge and the fourth data table.
- the second heating control module 1203 includes:
- a third heating control unit configured to start heating the battery at a third moment based on a fourth current frequency and a third current amplitude
- the battery heating device 1200 may further include:
- the second execution module is configured to return to the step of obtaining the second temperature and the second state of charge of the battery when the fourth moment is reached, and the duration between the fourth moment and the third moment is equal to the second preset duration .
- the battery heating device is a device corresponding to the above-mentioned battery heating method, and all the implementation methods in the above-mentioned method embodiments are applicable to the embodiments of the device, and can also achieve the same technical effect.
- FIG. 13 shows a schematic diagram of a hardware structure of an electronic device provided by an embodiment of the present application.
- the electronic device may include a processor 1301 and a memory 1302 storing computer program instructions.
- the processor 1301 may include a central processing unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits in the embodiments of the present application.
- CPU central processing unit
- ASIC Application Specific Integrated Circuit
- Memory 1302 may include mass storage for data or instructions.
- memory 1302 may include a hard disk drive (Hard Disk Drive, HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (Universal Serial Bus, USB) drive or two or more Combinations of multiple of the above.
- Storage 1302 may include removable or non-removable (or fixed) media, where appropriate. Under appropriate circumstances, the storage 1302 can be inside or outside the comprehensive gateway disaster recovery device.
- memory 1302 is a non-volatile solid-state memory.
- Memory may include read only memory (ROM), random access memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical/tangible memory storage devices.
- ROM read only memory
- RAM random access memory
- magnetic disk storage media devices magnetic disk storage media devices
- optical storage media devices flash memory devices
- electrical, optical, or other physical/tangible memory storage devices include one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software comprising computer-executable instructions, and when the software is executed (e.g., by one or multiple processors) operable to perform the operations described with reference to the method according to the present disclosure.
- the processor 1301 reads and executes the computer program instructions stored in the memory 1302 to implement any battery heating method in the foregoing embodiments.
- the electronic device may also include a communication interface 1304 and a bus 1304 .
- a communication interface 1304 and a bus 1304 .
- a processor 1301 a memory 1302 , and a communication interface 1304 are connected through a bus 1304 to complete mutual communication.
- the communication interface 1304 is mainly used to realize communication between various modules, devices, units and/or devices in the embodiments of the present application.
- Bus 1304 includes hardware, software, or both.
- the bus may include Accelerated Graphics Port (AGP) or other graphics bus, Enhanced Industry Standard Architecture (EISA) bus, Front Side Bus (FSB), HyperTransport (HT) interconnect, Industry Standard Architecture (ISA) Bus, Infiniband Interconnect, Low Pin Count (LPC) Bus, Memory Bus, Micro Channel Architecture (MCA) Bus, Peripheral Component Interconnect (PCI) Bus, PCI-Express (PCI-X) Bus, Serial Advanced Technology Attachment (SATA) bus, Video Electronics Standards Association Local (VLB) bus or other suitable bus or a combination of two or more of these.
- Bus 1304 may comprise one or more buses, where appropriate. Although the embodiments of this application describe and illustrate a particular bus, this application contemplates any suitable bus or interconnect.
- the embodiments of the present application may provide a computer storage medium for implementation.
- Computer program instructions are stored on the computer storage medium; when the computer program instructions are executed by a processor, any one of the battery heating methods in the foregoing embodiments is implemented.
- the functional blocks shown in the above structural block diagrams may be implemented as hardware, software, firmware or a combination thereof.
- it When implemented in hardware, it may be, for example, an electronic circuit, an application specific integrated circuit (ASIC), suitable firmware, a plug-in, a function card, or the like.
- ASIC application specific integrated circuit
- the elements of the present application are the programs or code segments employed to perform the required tasks.
- Programs or code segments can be stored in machine-readable media, or transmitted over transmission media or communication links by data signals carried in carrier waves.
- "Machine-readable medium" may include any medium that can store or transmit information.
- machine-readable media examples include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, and the like.
- Code segments may be downloaded via a computer network such as the Internet, an Intranet, or the like.
- processors may be, but are not limited to, general purpose processors, special purpose processors, application specific processors, or field programmable logic circuits. It can also be understood that each block in the block diagrams and/or flowcharts and combinations of blocks in the block diagrams and/or flowcharts can also be realized by dedicated hardware for performing specified functions or actions, or can be implemented by dedicated hardware and Combination of computer instructions to achieve.
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Abstract
Description
Claims (14)
- 一种电池加热方法,包括:获取电池的第一温度和第一荷电状态;根据所述第一温度、所述第一荷电状态以及预设的第一数据表,确定第一电流频率,所述第一数据表包括在第一电流幅值条件下,所述第一温度、所述第一荷电状态以及所述第一电流频率之间的对应关系;基于所述第一电流幅值与所述第一电流频率加热所述电池。
- 根据权利要求1所述的方法,其中,所述第一数据表的数量为N个,N个所述第一数据表关联N个电池健康度,N为大于1的整数;所述根据所述第一温度、所述第一荷电状态以及预设的第一数据表,确定第一电流频率,包括:获取所述电池的第一健康度;从N个所述第一数据表中确定出与所述第一健康度关联的第二数据表;根据所述第一温度、所述第一荷电状态以及所述第二数据表,确定第一电流频率。
- 根据权利要求1所述的方法,其中,所述基于所述第一电流幅值与所述第一电流频率加热所述电池,包括:在第一时刻开始,基于所述第一电流幅值与所述第一电流频率加热所述电池;所述基于所述第一电流幅值与所述第一电流频率加热所述电池之后,所述方法还包括:在到达第二时刻的情况下,返回执行所述获取电池的第一温度和第一荷电状态的步骤,所述第二时刻与所述第一时刻之间的时长等于第一预设时长。
- 根据权利要求1所述的方法,其中,所述根据所述第一温度、所述第一荷电状态以及预设的第一数据表,确定第一电流频率之后,所述方法还包括:在获取到第二电流幅值的情况下,根据所述第二电流幅值确定第三电流频率,所述第三电流频率为在所述第二电流幅值条件下,对所述电池加热的安全电流频率;根据所述第一电流频率与所述第三电流频率之间的较大值,以及所述第二电流幅值,加热所述电池。
- 一种电池加热方法,包括:获取电池的第二温度和第二荷电状态;根据所述第二温度、所述第二荷电状态以及预设的第三数据表,确定第三电流幅值,所述第三数据表包括在第四电流频率条件下,所述第二温度、所述第二荷电状态以及所述第三电流幅值之间的对应关系;基于所述第四电流频率和所述第三电流幅值加热所述电池。
- 根据权利要求5所述的方法,其中,所述确定第三电流幅值之后,所述方法还包括:获取所述电池的输出电压;在所述输出电压小于电压阈值的情况下,基于预设的第五电流频率与所述第三电流幅值加热所述电池;所述基于所述第四电流频率和所述第三电流幅值加热所述电池,包括:在所述输出电压大于或等于所述电压阈值的情况下,基于所述第四电流频率和所述第三电流幅值加热所述电池;其中,所述第五电流频率大于所述第四电流频率。
- 根据权利要求5所述的方法,其中,所述第三电流幅值为正向电流幅值;所述基于所述第四电流频率和所述第三电流幅值加热所述电池,包括:基于所述第四电流频率、所述第三电流幅值以及预设的第一负向电流幅值加热所述电池。
- 根据权利要求7所述的方法,其中,所述确定第三电流幅值之后,所述方法还包括:获取所述电池的输出电压;在所述输出电压小于电压阈值的情况下,基于所述第四电流频率、所述第三电流幅值以及预设的第二负向电流幅值加热所述电池;所述基于所述第四电流频率、所述第三电流幅值以及预设的第一负向电流幅值加热所述电池,具体包括:在所述输出电压大于或等于所述电压阈值的情况下,基于所述第四电流频率、所述第三电流幅值以及预设的第一负向电流幅值加热所述电池;其中,所述第一负向电流幅值大于所述第二负向电流幅值。
- 根据权利要求5所述的方法,其中,所述第三数据表的数量为M个,M个所述第三数据表关联M个电池健康度,M为大于1的整数;所述根据所述第二温度、所述第二荷电状态以及预设的第三数据表,确定第三电流幅值,包括:获取所述电池的第二健康度;从M个所述第三数据表中确定出与所述第二健康度关联的第四数据表;根据所述第二温度、所述第二荷电状态以及所述第四数据表,确定第三电流幅值。
- 根据权利要求5所述的方法,其中,所述基于所述第四电流频率和所述第三电流幅值加热所述电池,包括:在第三时刻开始,基于所述第四电流频率和所述第三电流幅值加热所述电池;所述基于所述第四电流频率和所述第三电流幅值加热所述电池之后,所述方法还包括:在到达第四时刻的情况下,返回执行所述获取电池的第二温度和第二荷电状态的步骤,所述第四时刻与所述第三时刻之间的时长等于第二预设时长。
- 一种电池加热装置,包括:第一获取模块,用于获取电池的第一温度和第一荷电状态;第一确定模块,用于根据所述第一温度、所述第一荷电状态以及预设的第一数据表,确定第一电流频率,所述第一数据表包括在第一电流幅值条件下,所述第一温度、所述第一荷电状态以及所述第一电流频率之间的对应关系;第一加热控制模块,用于基于所述第一电流幅值与所述第一电流频率加热所述电池。
- 一种电池加热装置,包括:第二获取模块,用于获取电池的第二温度和第二荷电状态;第二确定模块,用于根据所述第二温度、所述第二荷电状态以及预设的第三数据表,确定第三电流幅值,所述第三数据表包括在第四电流频率条件下,所述第二温度、所述第二荷电状态以及所述第三电流幅值之间的对应关系;第二加热控制模块,用于基于所述第四电流频率和所述第三电流幅值加热所述电池。
- 一种电子设备,包括:处理器以及存储有计算机程序指令的存储器;所述处理器执行所述计算机程序指令时实现如权利要求1-4任意一项所述的电池加热方法,或者实现如权利要求5-10任意一项所述的电池加热 方法。
- 一种计算机存储介质,所述计算机存储介质上存储有计算机程序指令,所述计算机程序指令被处理器执行时实现如权利要求1-4任意一项所述的电池加热方法,或者实现如权利要求5-10任意一项所述的电池加热方法。
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