CN114019394B - Battery quick-charge map test method, device and equipment - Google Patents
Battery quick-charge map test method, device and equipment Download PDFInfo
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
- G01R31/388—Determining ampere-hour charge capacity or SoC involving voltage measurements
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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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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Abstract
The invention discloses a battery quick charge map test method, which comprises the following steps: under a target condition, obtaining the open-circuit voltage and the internal resistance of the battery; inquiring a corresponding target current multiplying power in the quick charge map based on the target temperature condition and the open-circuit voltage, and calculating the product of the target current multiplying power and the battery capacity to obtain a charging current; and calculating charging voltage corresponding to the charging current based on the open-circuit voltage and the internal resistance of the battery, comparing the charging voltage with the protection voltage, and adjusting the target current multiplying power in the fast charging map if the charging voltage exceeds the protection voltage so that the charging voltage is not greater than the protection voltage. According to the technical scheme provided by the invention, the multiplying power value in the quick charge map is accurately adjusted by calculating the error of the charging voltage and the protection voltage under the target condition, so that the safety of the battery during charging is ensured.
Description
Technical Field
The invention relates to the field of new energy battery design, in particular to a battery quick-charge map test method, device and equipment.
Background
With the popularity of battery fast-charge technology, more and more battery fire events occur, and most fire events occur during the battery charging phase. The charge safety performance of the battery directly affects the life safety and public safety of the user. In order to shorten the charging time, the current quick charging technology is to increase the rate of the charging current, which leads to a sharp temperature rise in the charging process, and meanwhile, the high-rate charging is accompanied by the influence of battery safety. The quick charge map is a charging meter for recording the multiplying power of the charging current of the battery under different terminal voltages and different temperature conditions, so that the multiplying power value in the quick charge map can be ensured to amplify the current under safe and reasonable conditions, and the quick charge map is one of technical difficulties for preventing potential safety hazards in the battery charging process.
Disclosure of Invention
In view of this, the embodiment of the invention provides a method, a device and equipment for testing a battery quick charge map, so that the charging voltage exceeding the normal use range of the voltage caused by the excessively high current multiplying power in the quick charge map is avoided, and the safety of the battery during charging is improved.
According to a first aspect, the present invention provides a battery fast-charge map test method, the method comprising: under a target condition, obtaining the open-circuit voltage and the internal resistance of the battery, wherein the target condition comprises a target temperature condition and a target SOC condition; inquiring a corresponding target current multiplying power in the quick charge map based on the target temperature condition and the open-circuit voltage, and calculating the product of the target current multiplying power and the battery capacity to obtain a charging current; and calculating a charging voltage corresponding to the charging current based on the open-circuit voltage and the internal resistance of the battery, comparing the charging voltage with a protection voltage, and adjusting a target current multiplying power in the fast charging map if the charging voltage exceeds the protection voltage so that the charging voltage is not greater than the protection voltage.
Optionally, the acquiring the open circuit voltage and the internal resistance of the battery includes: querying a standard open circuit voltage map for the open circuit voltage based on the target temperature condition and the target SOC condition; inquiring the internal resistance in a standard internal resistance map based on the target temperature condition and the target SOC condition.
Optionally, the calculating the charging voltage corresponding to the charging current based on the open circuit voltage and the internal resistance of the battery includes: substituting the charging current, the open circuit voltage, and the battery internal resistance into a formula: charging voltage = open circuit voltage + charging current x internal resistance of the battery, said charging voltage of the battery being obtained.
Optionally, the adjusting the target current multiplying power in the fast charging map includes: the target current magnification is adjusted based on the protection voltage, the open-circuit voltage, the battery internal resistance, and the battery capacity.
Optionally, the adjusting the target current multiplying factor based on the protection voltage, the open circuit voltage, the battery internal resistance, and the battery capacity includes: substituting the protection voltage, the open circuit voltage, the battery internal resistance, and the battery capacity into a formula:
obtaining a first current multiplying power; and replacing the corresponding target current multiplying power in the quick charge map by using the first current multiplying power to serve as a new current multiplying power corresponding to a target condition in the quick charge map.
Optionally, the test method is performed in two states of the cell BOL and the cell EOL, respectively.
Optionally, the method further comprises: extracting a plurality of test conditions generated by matching a preset temperature interval and a preset SOC interval; and traversing all the test conditions based on the steps from the step of acquiring the open-circuit voltage and the internal resistance of the battery to the step of adjusting the target current multiplying power in the quick charge map so as to generate the quick charge map matching all the test conditions.
According to a second aspect, the present invention provides a battery fast-charge map testing device, the device comprising: the parameter acquisition module is used for acquiring the open-circuit voltage and the internal resistance of the battery under target conditions, wherein the target conditions comprise a target temperature condition and a target SOC condition; the current calculation module is used for inquiring the corresponding target current multiplying power in the quick charge map based on the target temperature condition and the open-circuit voltage, and calculating the product of the target current multiplying power and the battery capacity to obtain a charging current; and the test adjustment module is used for calculating the charging voltage corresponding to the charging current based on the open-circuit voltage and the internal resistance of the battery, comparing the charging voltage with the protection voltage, and adjusting the target current multiplying power in the quick charge map if the charging voltage exceeds the protection voltage so that the charging voltage is not greater than the protection voltage.
According to a third aspect, the present invention provides a battery quick-charge map test apparatus, comprising: the system comprises a memory and a processor, wherein the memory and the processor are in communication connection, the memory stores computer instructions, and the processor executes the computer instructions, thereby executing the method in the first aspect or any optional implementation manner of the first aspect.
According to a fourth aspect, the present invention provides a computer readable storage medium storing computer instructions for causing the computer to perform the method of the first aspect, or any one of the alternative embodiments of the first aspect.
The technical scheme that this application provided has following advantage:
according to the technical scheme, the corresponding target current multiplying power in the quick charge map is extracted through the open-circuit voltage and target temperature conditions of the battery, then the charging current calculated based on the battery capacity and the current multiplying power is combined with the open-circuit voltage and the internal resistance of the battery, and the charging voltage corresponding to the calculated charging current is compared with the protection voltage. If the charging voltage exceeds the protection voltage, the current multiplying power in the quick charging map is correspondingly adjusted, so that the charging voltage is not greater than the protection voltage, the safety of using the current multiplying power in the charging map under the target condition is improved, and the danger of generating a fire event due to the fact that the battery temperature is too high due to the fact that the voltage exceeds the protection range is avoided.
In addition, the open-circuit voltage and the internal resistance of the battery under the target condition are obtained through the inquiry of the standard open-circuit voltage map and the standard internal resistance map, so that the data accuracy of subsequent calculation is ensured. On the other hand, the test of the quick charge map not only sets a plurality of test conditions, but also tests in the BOL state and the EOL state of the battery cell according to each test condition, so that the quick charge map used by the battery cell in different service life states and under different conditions can be used safely and stably, the completeness of the test is ensured, and the safety of the battery during charging is further improved.
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The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and should not be construed as limiting the invention in any way, in which:
FIG. 1 is a schematic diagram showing steps of a battery quick-charge map test method according to an embodiment of the invention;
fig. 2 is a diagram showing an exemplary structure of a battery quick-charge map according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing a structure of a battery quick-charge map testing apparatus according to an embodiment of the present invention;
fig. 4 shows a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which a person skilled in the art would obtain without making any inventive effort, are within the scope of the invention.
Referring to fig. 1, in one embodiment, a method for testing a battery fast-charge map specifically includes the following steps:
step S1: under target conditions, an open circuit voltage and an internal resistance of the battery are obtained, and the target conditions include a target temperature condition and a target SOC condition. Specifically, the fast charge map is a two-dimensional table composed of different temperature conditions and different cell voltage conditions, and the data in the table are current multiplying power. Before testing the current multiplying power Of a specified position, specific position conditions, that is, the open-circuit voltage and the temperature Of the battery, need to be known, and the open-circuit voltage Of the battery is related to the temperature and the SOC (State Of Charge) Of the battery, so that the open-circuit voltage Of the battery can be obtained through experiments according to the specified temperature conditions and the SOC conditions. The internal resistance of the battery is required to be used in the subsequent calculation of the charge voltage of the battery, and the actual internal resistance of the battery is also related to the temperature and SOC of the battery, so that the open-circuit voltage and the internal resistance of the battery can be obtained through simultaneous tests based on target conditions. In an embodiment, it is inconvenient to obtain the open-circuit voltage and the internal resistance of the battery through experiments every time, and a lot of time is wasted, so in this embodiment, as shown in fig. 2, the open-circuit voltage is firstly queried in the standard open-circuit voltage map based on the target temperature condition and the target SOC condition, and then the internal resistance is queried in the standard internal resistance map based on the target temperature condition and the target SOC condition, so that the corresponding open-circuit voltage and internal resistance parameters of the battery can be obtained quickly and accurately.
Step S2: and inquiring the corresponding target current multiplying power in the quick charge map based on the target temperature condition and the open-circuit voltage, and calculating the product of the target current multiplying power and the battery capacity to obtain the charging current. Specifically, 1C, 2C, 0.2C, etc. used when the battery is charged and discharged have two-layer meanings: on the one hand, C represents the capacity of the battery per se, in Ah or mAh, and on the other hand, C is used to represent the ratio of the charge-discharge current of the battery, i.e. the current multiplying power. Assuming the battery is 1000mAh,1C charging is charging using 1000mA current. Namely: charge/discharge rate=charge/discharge current/rated capacity, for example, when the battery 20A having a rated capacity of 100Ah is discharged, the discharge rate is 0.2C. The battery charge-discharge rate C represents a measure of how fast the charge-discharge is. Thus, the charging current of the battery under the target condition is obtained by the product of the target current magnification and the battery capacity.
Step S3: and calculating charging voltage corresponding to the charging current based on the open-circuit voltage and the internal resistance of the battery, comparing the charging voltage with the protection voltage, and adjusting the target current multiplying power in the fast charging map if the charging voltage exceeds the protection voltage so that the charging voltage is not greater than the protection voltage. Specifically, in one embodiment, after the charging current of the battery is calculated, the charging current, the open-circuit voltage and the internal resistance of the battery are substituted into the formula: charging voltage = open circuit voltage + charging current x internal resistance of the battery. The charging voltage of the battery can be calculated, and therefore, the comparison result of the charging voltage of the battery and the protection voltage is used as a reference, when the charging voltage exceeds the protection voltage, the current multiplying power given by the quick charging map is not suitable, the unsafe risks such as battery ignition and the like easily occur, and the current multiplying power in the quick charging map needs to be adjusted, so that the function of correcting inaccurate data in the quick charging map is realized. In one embodiment, the charging rate in the fast-charge map is adjusted based on the protection voltage, the open-circuit voltage, the internal resistance of the battery, and the battery capacity, and the specific adjustment formula is as follows:
the current multiplying power obtained through calculation of the formula can enable the charging voltage of the battery to be completely equal to the protection voltage during charging, and under the condition that the battery protection voltage is not exceeded, the maximum current multiplying power and the charging speed are ensured, the charging time of the battery is shortened as much as possible, and the charging efficiency is improved.
Specifically, in one embodiment, the above-described testing steps are performed in two states, namely, the BOL (Beginning of Life, end of Life) and EOL (End of Life) of the battery cell. The battery capacities corresponding to the different battery core states are different (normally, the battery life state of the automobile battery is regarded as the EOL state when 80% of the initial state), so that the open circuit voltage and the battery internal resistance corresponding to the battery are different under the same temperature and SOC conditions, and the battery has different battery quick charge maps. The testing of the steps S1-S3 is carried out in different life stages so as to adjust the quick charge maps in different life stages, and the battery can be stably and safely charged in the whole life cycle.
Specifically, in an embodiment, a method for testing a battery fast-charge map further includes the following steps:
step one: and extracting a plurality of test conditions generated by matching the preset temperature interval and the preset SOC interval.
Step two: based on the steps from obtaining the open-circuit voltage and the internal resistance of the battery to adjusting the target current magnification in the quick charge map, all test conditions are traversed to generate a quick charge map matching all test conditions.
Specifically, for different geographic environments, the temperature change rule of the environment where the battery is located is different. Therefore, the temperature interval and the SOC interval can be preset in combination with the variation range of the actual external environment temperature, so that the test conditions are selected at preset intervals in the preset interval, all the test conditions are traversed by using the method of the steps S1-S3, the corresponding current multiplier value in the quick charge map is modified, and the reliability of the quick charge map is ensured under the condition of the minimum test times according to different use scenes. For example: setting a battery system temperature working interval, wherein T= [ T (1), T (2), …, T (m) ] is taken as an interval of 0.1 ℃, and SOC= [ SOC (1), SOC (2), … and SOC (n) ] is taken as an interval of 0.1% in an SOC working interval. The traversal detection cycle mode is that the temperature T is taken as a large cycle, the SOC is taken as a small cycle, namely, at the temperature T (1), the minimum value of the SOC is sequentially cycled to the maximum value of the SOC, n times of detection are carried out, the temperature T (1) is detected, then the temperature T (2) is cycled until the detection of the SOC (n) in the T (m) is completed, and m times of detection of the charging current multiplying power are counted. In the detection process, if the temperature and the SOC to be detected cannot completely coincide with the conditions in the standard open-circuit voltage map and the standard internal resistance map, adopting a lookup table method of temperature forward interpolation, SOC backward interpolation and voltage backward interpolation. For example: assuming that the gradient of the temperature condition in the table is [0 10 20 30], the current temperature of the battery is 5 ℃, the temperature is interpolated forward, namely, the data in the row corresponding to 0 degrees is obtained, and the current multiplying power data actually corresponding to 5 degrees is not obtained through linear calculation, because in the detection process, the current multiplying power needs to be ensured to be not changed frequently, on one hand, the battery performance plays a role in protecting, on the other hand, the working difficulty of a battery management system is reduced, and the situation that the operation amount of the battery management system is overlarge and the battery management system is halted is prevented.
Through the steps, the method for testing the battery quick charge map extracts the corresponding target current multiplying power in the quick charge map through the open-circuit voltage and the target temperature condition of the battery, then calculates the charging current based on the battery capacity and the current multiplying power, combines the open-circuit voltage and the internal resistance of the battery, and compares the charging voltage corresponding to the calculated charging current with the protection voltage. If the charging voltage exceeds the protection voltage, the current multiplying power in the quick charging map is correspondingly adjusted, so that the charging voltage is not greater than the protection voltage, the safety of using the current multiplying power in the charging map under the target condition is improved, and the danger of generating a fire event due to the fact that the battery temperature is too high due to the fact that the voltage exceeds the protection range is avoided.
In addition, the open-circuit voltage and the internal resistance of the battery under the target condition are obtained through the inquiry of the standard open-circuit voltage map and the standard internal resistance map, so that the data accuracy of subsequent calculation is ensured. On the other hand, the test of the quick charge map not only sets a plurality of test conditions, but also tests in the BOL state and the EOL state of the battery cell according to each test condition, so that the quick charge map used by the battery cell in different service life states and under different conditions can be used safely and stably, the completeness of the test is ensured, and the safety of the battery during charging is further improved.
As shown in fig. 3, this embodiment further provides a device for testing a battery fast-charge map, which includes:
the parameter acquisition module 101 is configured to acquire an open circuit voltage and an internal resistance of the battery under target conditions, where the target conditions include a target temperature condition and a target SOC condition. Details refer to the related description of step S1 in the above method embodiment, and will not be described herein.
The current calculation module 102 is configured to query a corresponding target current rate in the fast charge map based on the target temperature condition and the open-circuit voltage, and calculate a product of the target current rate and the battery capacity to obtain the charging current. For details, refer to the related description of step S2 in the above method embodiment, and no further description is given here.
The test adjustment module 103 is configured to calculate a charging voltage corresponding to the charging current based on the open-circuit voltage and the internal resistance of the battery, compare the charging voltage with the protection voltage, and adjust the target current multiplying power in the fast-charging map if the charging voltage exceeds the protection voltage, so that the charging voltage is not greater than the protection voltage. For details, refer to the related description of step S3 in the above method embodiment, and no further description is given here.
The embodiment of the invention provides a battery quick-charge map testing device, which is used for executing the battery quick-charge map testing method provided by the embodiment, and the implementation mode and the principle are the same, and details are referred to the related description of the embodiment of the method and are not repeated.
Through the cooperation of the components, the battery quick charge map testing device extracts the corresponding target current multiplying power in the quick charge map through the open-circuit voltage and target temperature conditions of the battery, then calculates the charging current based on the battery capacity and the current multiplying power, and compares the charging voltage corresponding to the calculated charging current with the protection voltage by combining the open-circuit voltage and the internal resistance of the battery. If the charging voltage exceeds the protection voltage, the current multiplying power in the quick charging map is correspondingly adjusted, so that the charging voltage is not greater than the protection voltage, the safety of using the current multiplying power in the charging map under the target condition is improved, and the danger of generating a fire event due to the fact that the battery temperature is too high due to the fact that the voltage exceeds the protection range is avoided.
In addition, the open-circuit voltage and the internal resistance of the battery under the target condition are obtained through the inquiry of the standard open-circuit voltage map and the standard internal resistance map, so that the data accuracy of subsequent calculation is ensured. On the other hand, the test of the quick charge map not only sets a plurality of test conditions, but also tests in the BOL state and the EOL state of the battery cell according to each test condition, so that the quick charge map used by the battery cell in different service life states and under different conditions can be used safely and stably, the completeness of the test is ensured, and the safety of the battery during charging is further improved.
Fig. 4 shows a battery fast-charge map test apparatus according to an embodiment of the invention, which apparatus comprises a processor 901 and a memory 902, which may be connected via a bus or otherwise, fig. 4 taking a bus connection as an example.
The processor 901 may be a central processing unit (Central Processing Unit, CPU). The processor 901 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 a combination thereof.
The memory 902 is used as a non-transitory computer readable storage medium for storing non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules corresponding to the methods in the method embodiments described above. The processor 901 executes various functional applications of the processor and data processing, i.e., implements the methods in the above-described method embodiments, by running non-transitory software programs, instructions, and modules stored in the memory 902.
The memory 902 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created by the processor 901, and the like. In addition, the memory 902 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 902 optionally includes memory remotely located relative to processor 901, which may be connected to processor 901 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
One or more modules are stored in the memory 902 that, when executed by the processor 901, perform the methods of the method embodiments described above.
Specific details of the battery fast-charge map test apparatus may be correspondingly understood by referring to corresponding related descriptions and effects in the foregoing method embodiments, and will not be repeated herein.
It will be appreciated by those skilled in the art that implementing all or part of the above-described methods in the embodiments may be implemented by a computer program for instructing relevant hardware, and the implemented program may be stored in a computer readable storage medium, and the program may include the steps of the embodiments of the above-described methods when executed. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations are within the scope of the invention as defined by the appended claims.
Claims (8)
1. A battery fast charge map test method, the method comprising:
under a target condition, obtaining the open-circuit voltage and the internal resistance of the battery, wherein the target condition comprises a target temperature condition and a target SOC condition;
inquiring a corresponding target current multiplying power in the quick charge map based on the target temperature condition and the open-circuit voltage, and calculating the product of the target current multiplying power and the battery capacity to obtain a charging current;
calculating a charging voltage corresponding to the charging current based on the open-circuit voltage and the internal resistance of the battery, comparing the charging voltage with a protection voltage, and adjusting a target current multiplying power in the fast charging map if the charging voltage exceeds the protection voltage so that the charging voltage is not greater than the protection voltage; the adjusting the target current multiplying power in the fast charge map comprises: adjusting the target current magnification based on the protection voltage, the open circuit voltage, the battery internal resistance, and the battery capacity; the adjusting the target current magnification based on the protection voltage, the open-circuit voltage, the battery internal resistance, and the battery capacity includes:
substituting the protection voltage, the open circuit voltage, the battery internal resistance, and the battery capacity into a formula:
obtaining a first current multiplying power;
and replacing the corresponding target current multiplying power in the quick charge map by using the first current multiplying power to serve as a new current multiplying power corresponding to a target condition in the quick charge map.
2. The method of claim 1, wherein the obtaining the open circuit voltage and the internal resistance of the battery comprises:
querying a standard open circuit voltage map for the open circuit voltage based on the target temperature condition and the target SOC condition;
inquiring the internal resistance in a standard internal resistance map based on the target temperature condition and the target SOC condition.
3. The method of claim 1, wherein the calculating the charging voltage corresponding to the charging current based on the open circuit voltage and the internal battery resistance comprises:
substituting the charging current, the open circuit voltage, and the battery internal resistance into a formula:
charging voltage=open circuit voltage+charging current×internal resistance of battery
The charging voltage of the battery is obtained.
4. The method of claim 1, wherein the testing method is performed in two states, cell BOL and cell EOL, respectively.
5. The method according to claim 4, wherein the method further comprises:
extracting a plurality of test conditions generated by matching a preset temperature interval and a preset SOC interval;
and traversing all the test conditions based on the steps from the step of acquiring the open-circuit voltage and the internal resistance of the battery to the step of adjusting the target current multiplying power in the quick charge map so as to generate the quick charge map matching all the test conditions.
6. A battery fast charge map testing apparatus, the apparatus comprising:
the parameter acquisition module is used for acquiring the open-circuit voltage and the internal resistance of the battery under target conditions, wherein the target conditions comprise a target temperature condition and a target SOC condition;
the current calculation module is used for inquiring the corresponding target current multiplying power in the quick charge map based on the target temperature condition and the open-circuit voltage, and calculating the product of the target current multiplying power and the battery capacity to obtain a charging current;
the test adjustment module is used for calculating a charging voltage corresponding to the charging current based on the open-circuit voltage and the internal resistance of the battery, comparing the charging voltage with a protection voltage, and adjusting a target current multiplying power in the quick charge map if the charging voltage exceeds the protection voltage so that the charging voltage is not greater than the protection voltage; the adjusting the target current multiplying power in the fast charge map comprises: adjusting the target current magnification based on the protection voltage, the open circuit voltage, the battery internal resistance, and the battery capacity; the adjusting the target current magnification based on the protection voltage, the open-circuit voltage, the battery internal resistance, and the battery capacity includes:
substituting the protection voltage, the open circuit voltage, the battery internal resistance, and the battery capacity into a formula:
obtaining a first current multiplying power;
and replacing the corresponding target current multiplying power in the quick charge map by using the first current multiplying power to serve as a new current multiplying power corresponding to a target condition in the quick charge map.
7. A battery fast-charge map test apparatus, comprising:
a memory and a processor in communication with each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the method of any of claims 1-5.
8. A computer readable storage medium storing computer instructions for causing the computer to perform the method of any one of claims 1-5.
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