CN109738805B - Battery, testing method and device thereof, and electronic equipment - Google Patents
Battery, testing method and device thereof, and electronic equipment Download PDFInfo
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- CN109738805B CN109738805B CN201811647757.4A CN201811647757A CN109738805B CN 109738805 B CN109738805 B CN 109738805B CN 201811647757 A CN201811647757 A CN 201811647757A CN 109738805 B CN109738805 B CN 109738805B
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Abstract
The invention provides a battery testing method, a device and a battery, wherein the method comprises the following steps: acquiring a target altitude of a target area in which a battery is attempted to be used; acquiring attribute information of the battery; wherein the attribute information includes material information of the battery and shape information of the battery; acquiring an internal air pressure value of the battery according to the target altitude and the attribute information; and judging whether a battery protection device in the battery is started under the target altitude according to the internal air pressure value. According to the invention, the internal air pressure values of the battery at different altitudes can be directly obtained through a software method, so that whether the battery protection device is triggered at the altitude or not is determined, the battery is protected, the battery does not need to be placed in an actual test environment for testing, and the problems of low accuracy, long time consumption and serious resource waste existing in the conventional battery testing method are solved.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery, a testing method and a testing device thereof, and electronic equipment.
Background
With the rapid development of new energy industry in western plateau areas in China, the position of a storage battery as an energy storage part becomes more important. The application scene of the high-altitude area puts special requirements on the configuration of the storage battery. Energy storage type lithium ion battery is as the mainstream technique of energy storage, and the application scene is mostly that the constant temperature scene is used, therefore under the application place of high altitude, its maximum influence factor to the battery is the low atmospheric pressure that air density is lower brings, and energy storage type lithium ion battery is under the condition of low atmospheric pressure, long circulation, very easily appears battery protection device's the condition of mistake upset in advance/opening, influences the normal use of battery.
In the related art, the test as to whether the battery protection device is turned over/turned on in advance by mistake can be implemented only by performing an actual cycle test on the battery while observing the state of the protection device.
However, the related art has the following disadvantages: in the prior art, the actual cycle test of the battery can be only carried out and the state of the protection device can be observed at the same time, but the application time of the energy storage battery is more than 10 years, so that the method for testing the battery is low in accuracy, consumes long time and wastes serious resources.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the first objective of the present invention is to provide a battery testing method to solve the problems of low accuracy, long time consumption and serious resource waste of the existing battery testing method.
The second purpose of the invention is to provide a testing device for batteries.
A third object of the present invention is to provide a battery.
A fourth object of the invention is to propose an electronic device.
A fifth object of the present invention is to propose a computer-readable storage medium.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for testing a battery, including the following steps: acquiring a target altitude of a target area in which a battery is attempted to be used; acquiring attribute information of the battery; wherein the attribute information includes material information of the battery and shape information of the battery; acquiring an internal air pressure value of the battery according to the target altitude and the attribute information; and judging whether a battery protection device in the battery is started under the target altitude according to the internal air pressure value.
According to an embodiment of the present invention, the obtaining the internal air pressure value of the battery according to the target altitude and the attribute information includes: acquiring a first air pressure value under the target altitude; acquiring a first air pressure difference between the first air pressure value and a standard air pressure value; acquiring the deformation amount of the battery under the first air pressure difference according to the first air pressure difference and the attribute information; and inquiring a first mapping relation between the deformation quantity and the internal air pressure value according to the deformation quantity of the battery to obtain the internal air pressure value of the battery.
According to an embodiment of the present invention, the obtaining a deformation amount of the battery at the first air pressure difference according to the first air pressure difference and the attribute information includes: acquiring a second mapping relation between the deformation quantity matched with the material information and the air pressure difference according to the material information in the attribute information; and inquiring the second mapping relation according to the first air pressure difference to obtain the deformation of the battery under the first air pressure difference.
According to an embodiment of the present invention, before the querying the first mapping relationship between the deformation amount and the internal air pressure value according to the deformation amount of the battery, the attribute information further includes: according to the size information of the battery, carrying out gridding processing on the battery to obtain a plurality of battery units; determining a value range and a preset step length of the internal relative pressure of the battery according to the material information of the battery; applying relative pressure to the battery unit according to the preset step length in the value range, and acquiring the deformation and the pressure of the battery under each relative pressure; and fitting the deformation quantity and the pressure of the battery under each relative pressure to obtain the first mapping relation of the battery.
According to an embodiment of the present invention, the determining whether a battery protection device in the battery is turned on at the target altitude according to the internal air pressure value includes: acquiring a first opening air pressure threshold of the battery protection device under the target altitude; comparing the internal air pressure value of the battery with the first opening air pressure threshold value, and if the internal air pressure value of the battery is greater than or equal to the first opening air pressure threshold value, judging that the battery protection device is opened at the target altitude; and if the internal air pressure value of the battery is smaller than the first opening air pressure threshold value, determining that the battery protection device is not opened at the target altitude.
According to an embodiment of the present invention, the obtaining the threshold of the opening air pressure of the battery protection device at the target altitude comprises: acquiring a second starting air pressure threshold of the battery protection device under the standard atmospheric pressure according to the attribute information; converting the second opening barometric pressure threshold to the first barometric pressure opening threshold at the target altitude.
The embodiment of the invention provides a battery testing method, which can obtain an internal air pressure value of a battery by obtaining a target altitude and attribute information of the battery, and then judge whether a battery protection device in the battery is started at the target altitude based on the internal air pressure value, so as to realize the prediction evaluation of the battery.
In order to achieve the above object, a second embodiment of the present invention provides a testing apparatus for a battery, including: a first acquisition module for acquiring a target altitude of a target area in which a battery is intended to be used; the second acquisition module is used for acquiring the attribute information of the battery; wherein the attribute information includes material information of the battery and shape information of the battery; the third acquisition module is used for acquiring the internal air pressure value of the battery according to the target altitude and the attribute information; and the judging module is used for judging whether a battery protection device in the battery is started under the target altitude according to the internal air pressure value.
According to an embodiment of the present invention, the third obtaining module is further configured to: acquiring a first air pressure value under the target altitude; acquiring a first air pressure difference between the first air pressure value and a standard air pressure value; acquiring the deformation amount of the battery under the first air pressure difference according to the first air pressure difference and the attribute information; and inquiring a first mapping relation between the deformation quantity and the internal air pressure value according to the deformation quantity of the battery to obtain the internal air pressure value of the battery.
According to an embodiment of the present invention, the third obtaining module is further configured to: acquiring a second mapping relation between the deformation quantity matched with the material information and the air pressure difference according to the material information in the attribute information; and inquiring the second mapping relation according to the first air pressure difference to obtain the deformation of the battery under the first air pressure difference.
According to an embodiment of the present invention, the mapping obtaining module is configured to: before querying the first mapping relation according to the variable of the battery, performing gridding processing on the battery according to the size information of the battery to obtain a plurality of battery units; determining a value range and a preset step length of the internal relative pressure of the battery according to the material information of the battery; applying relative pressure to the battery unit according to the preset step length in the value range, and acquiring the deformation and the pressure of the battery under each relative pressure; and fitting the deformation quantity and the pressure of the battery under each relative pressure to obtain the first mapping relation of the battery.
According to an embodiment of the present invention, the determining module is further configured to: acquiring a first opening air pressure threshold of the battery protection device under the target altitude; comparing the internal air pressure value of the battery with the first opening air pressure threshold value, and if the internal air pressure value of the battery is greater than or equal to the first opening air pressure threshold value, judging that the battery protection device is opened at the target altitude; and if the internal air pressure value of the battery is smaller than the first opening air pressure threshold value, determining that the battery protection device is not opened at the target altitude.
According to an embodiment of the present invention, the determining module is further configured to: acquiring a second starting air pressure threshold of the battery protection device under the standard atmospheric pressure according to the attribute information; converting the second opening barometric pressure threshold to the first barometric pressure opening threshold at the target altitude.
The embodiment of the second aspect of the invention provides a battery testing device, which can obtain an internal air pressure value of a battery by obtaining a target altitude and attribute information of the battery, and then judge whether a battery protection device in the battery is started at the target altitude based on the internal air pressure value, so as to realize the prediction evaluation of the battery.
To achieve the above object, a third embodiment of the present invention provides a battery, including: the embodiment of the second aspect of the invention provides a testing device for a battery.
To achieve the above object, a fourth aspect of the present invention provides an electronic device, including a memory, a processor; the processor reads the executable program code stored in the memory to run a program corresponding to the executable program code, so as to implement the method for testing the battery provided by the embodiment of the first aspect of the present invention.
To achieve the above object, a fifth embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, wherein the computer program is configured to, when executed by a processor, implement the method for testing a battery provided in the first embodiment of the present invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flow chart of a method for testing a battery according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for testing a battery according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a housing gridding process of a battery testing method according to an embodiment of the present invention;
FIG. 4 is a left side view of a housing deformation amount distribution of a method of testing a battery according to an embodiment of the present invention;
FIG. 5 is a graph showing a relationship between a displacement of a center point and a gas pressure inside a battery according to a method for testing a battery of the present invention;
fig. 6 is a schematic structural diagram of a device for testing a battery according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a battery according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A method and apparatus for testing a battery according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for testing a battery according to an embodiment of the present invention. As shown in fig. 1, the method for testing a battery according to an embodiment of the present invention includes the following steps:
s101: a target altitude of a target area in which the battery is intended to be used is acquired.
The battery may be a lithium ion battery, a lead acid battery, or other different types of batteries. In view of the low accuracy, long time consumption and serious waste of resources in the current test of the battery, in order to make the test of the battery more in line with the actual requirement, as shown in fig. 1, in the embodiment of the present invention, the battery is predicted by performing predictive evaluation on the battery, the internal air pressure values of the battery at different altitudes are predicted, and the battery is tested by different conditions of the internal air pressure values of the battery.
That is, the battery may be first controlled to acquire a target altitude of a target area in which the battery is intended to be used, before attempting a predictive evaluation of the battery by an internal air pressure value of the battery. Alternatively, the altitude of the target area to which the battery is intended to be applied is directly input, and the acquisition means of the battery acquires the altitude and marks it as the target altitude of the target area. Alternatively, the position information of the target area to which the battery is intended to be applied is directly input, and the target altitude of the target area can be queried based on the position information.
S102: acquiring attribute information of a battery; the attribute information includes material information of the battery and shape information of the battery.
Specifically, before attempting a predictive evaluation of the battery by the internal air pressure value of the battery, it is also necessary to acquire the attribute information of the battery. The attribute information of the battery at least comprises the following aspects: material information of the battery, shape information of the battery, and size information of the battery.
S103: and acquiring the internal air pressure value of the battery according to the target altitude and the attribute information.
Different altitudes affect the battery differently, and thus the internal air pressure value of the battery may also differ. Moreover, the internal air pressure values of the batteries with different attribute information at the same altitude may also be different, so that, in the embodiment of the present invention, the air pressure value of the content portion of the battery needs to be obtained according to the target altitude and the attribute information, as shown in fig. 2, the method specifically includes the following steps:
s1031: a first barometric pressure value at a target altitude is obtained.
As a possible implementation manner, a mapping relation table between the altitude and the corresponding barometric pressure value may be established in advance, as shown in table 1:
TABLE 1
| Altitude (m) | Air pressure (kPa) |
| 0 | 101.3 |
| 100 | 100.1 |
| 200 | 98.8 |
| 300 | 97.6 |
| 400 | 96.4 |
| 500 | 95.2 |
| 600 | 94 |
| 700 | 92.8 |
| 800 | 91.7 |
| 900 | 90.5 |
| 1000 | 89.4 |
| 1100 | 88.3 |
| 1200 | 87.2 |
| 1300 | 86.1 |
| 1400 | 85 |
| 1500 | 84 |
| 1600 | 82.9 |
| 1700 | 81.9 |
| 1800 | 80.9 |
| 1900 | 79.7 |
| 2000 | 78.9 |
| 2100 | 77.9 |
| 5000 | 44.84 |
After the target altitude is obtained, the air pressure value at the target altitude, that is, the first air pressure value, can be obtained by querying a mapping relation table, that is, table 1, between the altitude and the corresponding air pressure value.
For example, when the target altitude of the target area which has acquired the input and needs to be applied is 1000 meters, the first barometric pressure value is 89.4kPa when the altitude is 1000 meters can be acquired according to the mapping relationship between the altitude and the corresponding barometric pressure value in table 1.
As another possible implementation manner, the barometric pressure value corresponding to the obtained target altitude, i.e. the first barometric pressure value, may be calculated by a calculation method of a barometric pressure altitude formula, where the calculation formula is as follows:
P＝P0×(1-H/44300)∧5.256
wherein H is the target altitude, P0Is the atmospheric pressure value in the standard condition (0 ℃, 101.325 kPa). For example, when the target altitude of the target area which needs to be applied and has acquired the input is 1000 meters, the first barometric pressure value can be calculated according to the calculation formula to be 89.9 kPa.
S1032: a first air pressure difference between the first air pressure value and the standard air pressure value is obtained.
Further, after the first air pressure value corresponding to the target altitude is obtained, a difference value between the first air pressure value and the standard air pressure value, that is, a first air pressure difference may be obtained.
S1033: and acquiring the deformation amount of the battery under the first air pressure difference according to the first air pressure difference and the attribute information.
Further, the deformation amount corresponding to the first air pressure difference can be obtained according to a second mapping relation between the first air pressure difference and the attribute information of the battery. Alternatively, size information is extracted from the attribute information of the battery, and then the battery is subjected to gridding processing according to the size information of the battery to obtain a plurality of battery cells.
And further extracting material information from the attribute information of the battery, and then determining the value range and the preset step length of the relative pressure inside the battery according to the material information of the battery. The preset step length can be set according to actual conditions. For example, the material of the battery may be stainless steel, aluminum alloy, or the like. Different materials correspond to different second mapping relations, wherein the second mapping relations are corresponding relations between deformation quantities and air pressure differences. After the material information is obtained, a second mapping relation matched with the material information can be determined from the plurality of second mapping relations according to the material information. Further, after a second mapping relation matched with the material information is obtained, the deformation amount of the battery under the first air pressure difference can be obtained by inquiring in the second mapping relation according to the first air pressure difference. Generally, the deformation amount of the battery is the deformation amount of the battery case.
S1034: and inquiring a first mapping relation between the deformation quantity and the internal air pressure value according to the deformation quantity of the battery to obtain the internal air pressure value of the battery.
Specifically, relative pressure is applied to the battery unit according to a preset step length in a value range, and deformation and pressure of the battery under each relative pressure are obtained. And fitting the deformation and the pressure of the battery under each relative pressure through simulation and calculation to obtain a relational expression between the air pressure value in the battery and the deformation of the battery shell, namely a first mapping relation. And obtaining the deformation quantity of the battery, and obtaining the internal air pressure value of the battery according to the mapping relation.
For example, as shown in fig. 3 to 4, a relational expression between the internal air pressure of the battery and the deformation of the battery case can be obtained through simulation and calculation, and then the internal air pressure value of the battery can be obtained through calculation according to the deformation of the battery case.
Specifically, as shown in fig. 3, the battery to be tested is simplified into a regular hexahedron and is divided into grids by ANSYS, the grid of the shell length × the width is mainly divided, and the number of the grids is set as follows: the length is 40, and the width is 30 grids.
Further, the value range of the gas pressure (relative pressure) in the battery is controlled to be 0-2.0 Pa, the step length is 0.2, and 10 equally-spaced points are taken between 0-2.0 Pa. Then, according to a preset step length, applying a relative pressure to the battery unit to obtain an internal air pressure value and displacement of a center point of the long-wide surface, that is, a deformation amount of the battery case, as shown in fig. 5, which is a deformation diagram of the battery unit. In the embodiment of the invention, the preset step length is 0.2 and is within the value range of 0-2.0 Pa, so that 10 groups of corresponding numerical values between the deformation quantity and the relative pressure can be obtained.
Further, two-dimensional coordinates are established: the horizontal axis is pressure intensity, the vertical axis is displacement, 10 groups of numerical values are represented in the coordinate axis to obtain a curve, and the curve is fitted to obtain a relational expression between the gas pressure intensity in the battery and the deformation of the shell, namely a first mapping relation. And then obtaining the internal air pressure value of the battery through the first mapping relation.
S104: and judging whether the battery protection device in the battery is started at the target altitude or not according to the internal air pressure value.
The internal air pressure of the battery is caused by gas generation in the use process of the battery, so that whether the battery protection device in the battery reaches the starting critical state or not can be judged by acquiring the internal air pressure value of the battery. If the battery protection device is not started after the critical state is reached, the air pressure in the battery is continuously increased, so that the problem of overlarge heat and the like during the operation of the battery is caused, and the normal operation of the battery is influenced by the phenomena of battery explosion and the like; if the battery protection device is turned on before the critical state is reached, the phenomenon of early error turning/turning on can be generated, and the normal work of the battery is influenced.
In the embodiment of the invention, a preset first air pressure starting threshold value is set for the battery, and the air pressure threshold value is a critical air pressure value for starting the battery protection device. It should be noted that the first air pressure starting threshold may be set according to the type of the battery, for example, when the battery is used for the first time, after the battery is powered on, the battery type information may be sent to a server in the background, and the first air pressure starting threshold may be obtained from the server in the background.
Specifically, the second opening air pressure threshold of the battery protection device under the standard atmospheric pressure may be determined according to the chemical material system of the battery cell and actual test data of different types of batteries, and then the second opening air pressure threshold may be converted into the first air pressure opening threshold under the target altitude according to the actual situation of the target altitude of the target area where the battery is trying to use.
Further, comparing the internal air pressure value of the battery with a first opening air pressure threshold value, and if the internal air pressure value of the battery is greater than or equal to the first opening air pressure threshold value, judging that the battery protection device is opened at the target altitude; and if the internal air pressure value of the battery is smaller than the first opening air pressure threshold value, judging that the battery protection device is not opened at the target altitude.
According to the battery testing device provided by the embodiment of the invention, the internal air pressure value of the battery can be obtained by obtaining the target altitude and the attribute information of the battery, and then whether the battery protection device in the battery is started at the target altitude is judged based on the internal air pressure value, so that the prediction evaluation of the battery can be realized.
The above embodiments will be explained below by taking a prismatic aluminum-can battery as an example.
Specifically, a certain square aluminum-shell battery is pre-applied to a power grid energy storage system in a highland and mountainous area with an altitude of 5000m, and the feasibility of battery application needs to be evaluated in a constant-temperature container with a system operating environment of 25 ℃. The pressure value of 5000m altitude is about 0.044MPa according to the relevant table query or calculation, and the difference value with the standard atmospheric pressure is about 0.05 MPa.
Specifically, the aluminum alloy for the battery was numbered 3003, and the amount of deformation of the case was about 3.3mm under a differential pressure of 0.05MPa as can be found by looking up the mechanical properties and the deformation relationship table with force and calculating.
Specifically, the battery is simplified into a regular hexahedron, grids are divided by ANSYS, the grids of the length multiplied by the width of the shell are mainly divided, and the grid number is set as follows: the length is 40, and the width is 30 grids;
further, the value range of the gas pressure (relative pressure) in the battery is 0-2.0 Pa, the step length is 0.2, namely 10 points with equal intervals are taken from 0-2.0 Pa to simulate the relation between the deformation of the battery shell and the gas pressure in the battery, 10 groups of corresponding numerical values between the deformation of the battery and the relative pressure are obtained, and the data records are shown in Table 2.
TABLE 2
| Pressure (Pa) | 0.2 | 0.4 | 0.6 | 0.8 | 1.0 | 1.2 | 1.4 | 1.6 | 1.8 | 2.0 |
| Displacement (mm) | 0.44 | 0.88 | 1.32 | 1.76 | 2.21 | 2.65 | 3.09 | 3.26 | 3.97 | 4.41 |
Further, the resume two-dimensional coordinates: the horizontal axis is pressure intensity, the vertical axis is displacement, 10 groups of numerical values are represented in the coordinate axis to obtain a curve, and the curve is fitted to obtain a relation between the gas pressure intensity inside the battery and the deformation of the shell as shown in figure 5, wherein the relation is as follows:
y＝0.0004x2+8.2503x-0.0001
where y is the amount of shell deformation and x is the gas pressure inside the cell.
Further, according to the obtained deformation of the shell and the relational expression between the gas pressure inside the battery and the deformation of the shell, the gas pressure inside the battery is calculated to be about 0.4 MPa.
Specifically, the pressure of the reliability technical parameter of the battery protection device under the standard atmospheric pressure is 0.55 plus or minus 0.1MPa, namely the lower limit specification value is 0.45MPa, the value converted into the value under the altitude of 5000m is 0.393MPa, and the internal air pressure value of the comparative battery is about 0.4MPa and is greater than the specification value of 0.393MPa, so that the protection device can be turned over or turned on when the battery is applied at the altitude of 5000m, the current of the battery is cut off, the battery is normally used, and the battery is not suitable for being applied to a power grid energy storage system in a mountain area at the altitude of 5000 m.
The above-described embodiments will be explained below by taking a square stainless steel-cased battery as an example.
Specifically, a square stainless steel shell battery is applied to a plateau base station energy storage system with an altitude of 3500m in advance, and the feasibility of battery application needs to be evaluated in a constant-temperature container with a system operating environment of 30 ℃. According to the relevant table query or calculation, the air pressure value of 3500m altitude is about 0.061MPa, and the difference value with the standard atmospheric pressure is about 0.039 MPa.
Specifically, by inquiring the mechanical properties of the shell material and the deformation relation table with the force and calculating, the deformation amount of the shell under the pressure difference of 0.039MPa is about 2.2 mm.
Specifically, the step of determining the relation between the internal gas pressure of the battery and the deformation of the housing is the same as that in the above embodiment, and details are not repeated here, and the obtained relation between the internal gas pressure of the battery and the deformation of the housing is as follows:
y＝0.0001x2+6.1303x-0.0004
where y is the amount of shell deformation and x is the gas pressure inside the cell.
Further, according to the obtained deformation of the shell and the relational expression between the gas pressure in the battery and the deformation of the shell, the gas pressure in the battery is calculated to be about 0.33 MPa.
Specifically, the pressure of the reliability technical parameter of the battery protection device under the standard atmospheric pressure is 0.5 ± 0.1MPa, namely the lower limit specification value is 0.4MPa, the value converted to 3500m altitude is 0.36MPa, and the internal atmospheric pressure value of the comparative battery is about 0.33MPa and is less than the specification value of 0.36MPa, so that when the battery is applied at 3500m altitude, the protection device cannot be turned over or opened by mistake in advance, namely the battery can be applied to a plateau base station energy storage system at 3500m altitude.
The above embodiments will be explained below by taking a cylindrical stainless steel-cased battery as an example.
Specifically, a cylindrical stainless steel shell battery is applied to a commercial urban energy storage system with the altitude of 3000m in advance, and the feasibility of battery application needs to be evaluated in a constant-temperature container with the system operating environment of 25 ℃. The air pressure value of 3000m altitude is about 0.067Mpa, which is about 0.033Mpa different from the standard atmospheric pressure, according to the related table query or calculation.
Specifically, by inquiring the mechanical properties of the shell material and the deformation relation table and calculation of the force, the deformation amount of the shell under the pressure difference of 0.033MPa is about 1.8 mm.
Specifically, the step of determining the relation between the internal gas pressure of the battery and the deformation of the housing is the same as that in the above embodiment, and details are not repeated here, and the obtained relation between the internal gas pressure of the battery and the deformation of the housing is as follows:
y＝0.0003x2+2.2904x-0.0002
where y is the amount of shell deformation and x is the gas pressure inside the cell.
Further, according to the obtained deformation of the shell and the relational expression between the gas pressure inside the battery and the deformation of the shell, the gas pressure inside the battery is calculated to be about 0.78 MPa.
Specifically, the pressure of the reliability technical parameter of the battery protection device under the standard atmospheric pressure is 0.8 ± 0.1MPa, namely the lower limit specification value is 0.7MPa, the value converted to 3500m altitude is 0.66MPa, the internal atmospheric pressure value of the comparative battery is about 0.78MPa, and is greater than the specification value of 0.66MPa, so that when the battery is applied at 3000m altitude, the protection device can be turned over or opened by mistake in advance, namely the battery cannot be applied to a commercial energy storage system in a city with 3000m altitude.
In order to realize the embodiment, the invention further provides a testing device of the battery.
Fig. 6 is a schematic structural diagram of a device for testing a battery according to an embodiment of the present invention. As shown in fig. 6, the testing apparatus 100 for a battery according to an embodiment of the present invention includes: a first obtaining module 11, a second obtaining module 12, a third obtaining module 13, and a judging module 14.
The first acquiring module 11 is used for acquiring a target altitude of a target area which a battery tries to use; a second obtaining module 12, configured to obtain attribute information of the battery; the attribute information comprises material information of the battery and shape information of the battery; the third obtaining module 13 is configured to obtain an internal air pressure value of the battery according to the target altitude and the attribute information; and the judging module 14 is configured to judge whether the battery protection device in the battery is turned on at the target altitude according to the internal air pressure value.
Further, the third obtaining module 13 is further configured to: acquiring a first air pressure value under a target altitude; acquiring a first air pressure difference between a first air pressure value and a standard air pressure value; acquiring the deformation amount of the battery under the first air pressure difference according to the first air pressure difference and the attribute information; and inquiring a first mapping relation between the deformation quantity and the internal air pressure value according to the deformation quantity of the battery to obtain the internal air pressure value of the battery.
Further, the third obtaining module 13 is further configured to: acquiring a second mapping relation between the deformation quantity matched with the material information and the air pressure difference according to the material information in the attribute information; and inquiring the second mapping relation according to the first air pressure difference to obtain the deformation of the battery under the first air pressure difference.
Further, the mapping obtaining module 15 is configured to: before inquiring the first mapping relation according to the deformation quantity of the battery, carrying out gridding processing on the battery according to the size information of the battery to obtain a plurality of battery units; determining the value range and the preset step length of the internal relative pressure of the battery according to the material information of the battery; applying relative pressure to the battery unit according to a preset step length in a value range, and acquiring the deformation and the pressure of the battery under each relative pressure; and fitting the deformation quantity and the pressure of the battery under each relative pressure to obtain a first mapping relation of the battery.
Further, the determining module 14 is further configured to: acquiring a first starting air pressure threshold of a battery protection device under a target altitude; comparing the internal air pressure value of the battery with a first starting air pressure threshold value, and if the internal air pressure value of the battery is greater than or equal to the first starting air pressure threshold value, judging that the battery protection device is started at a target altitude; and if the internal air pressure value of the battery is smaller than the first opening air pressure threshold value, judging that the battery protection device is not opened at the target altitude.
Further, the determining module 14 is further configured to: acquiring a second starting air pressure threshold of the battery protection device under the marked atmospheric pressure according to the attribute information; and converting the second opening air pressure threshold value into a first air pressure opening threshold value under the target altitude.
It should be noted that the foregoing explanation of the embodiment of the battery testing method is also applicable to the battery testing apparatus of this embodiment, and is not repeated herein.
According to the battery testing device provided by the embodiment of the invention, the internal air pressure value of the battery can be obtained by obtaining the target altitude and the attribute information of the battery, and then whether the battery protection device in the battery is started at the target altitude is judged based on the internal air pressure value, so that the prediction evaluation of the battery can be realized.
In order to implement the foregoing embodiments, the present invention further provides an electronic device 300, as shown in fig. 8, which includes a memory 31, a processor 32, and a computer program stored in the memory and running on the processor, and when the processor executes the computer program, the electronic device implements the foregoing method for testing a battery.
In order to implement the above embodiments, the present invention also proposes a non-transitory computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the foregoing method of testing a battery.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. A method for testing a battery, comprising the steps of:
acquiring a target altitude of a target area in which a battery is attempted to be used;
acquiring attribute information of the battery; wherein the attribute information includes material information of the battery and shape information of the battery;
acquiring an internal air pressure value of the battery according to the target altitude and the attribute information;
judging whether a battery protection device in the battery is started at the target altitude or not according to the internal air pressure value;
the obtaining the internal air pressure value of the battery according to the target altitude and the attribute information comprises:
acquiring a first air pressure value under the target altitude;
acquiring a first air pressure difference between the first air pressure value and a standard air pressure value;
acquiring the deformation amount of the battery under the first air pressure difference according to the first air pressure difference and the attribute information;
inquiring a first mapping relation between the deformation quantity and the internal air pressure value according to the deformation quantity of the battery to obtain the internal air pressure value of the battery;
the attribute information further includes size information of the battery, and before querying a first mapping relationship between the deformation amount and the internal air pressure value according to the deformation amount of the battery, the attribute information further includes:
according to the size information of the battery, carrying out gridding processing on the battery to obtain a plurality of battery units;
determining a value range and a preset step length of the internal relative pressure of the battery according to the material information of the battery;
applying relative pressure to the battery unit according to the preset step length in the value range, and acquiring the deformation and the pressure of the battery under each relative pressure;
and fitting the deformation quantity and the pressure of the battery under each relative pressure to obtain the first mapping relation of the battery.
2. The method for testing the battery according to claim 1, wherein the obtaining the deformation amount of the battery under the first air pressure difference according to the first air pressure difference and the attribute information comprises:
acquiring a second mapping relation between the deformation quantity matched with the material information and the air pressure difference according to the material information in the attribute information;
and inquiring the second mapping relation according to the first air pressure difference to obtain the deformation of the battery under the first air pressure difference.
3. The method for testing a battery according to any one of claims 1-2, wherein the determining whether a battery protection device in the battery is turned on at the target altitude according to the internal air pressure value comprises:
acquiring a first opening air pressure threshold of the battery protection device under the target altitude;
comparing the internal air pressure value of the battery with the first opening air pressure threshold value, and if the internal air pressure value of the battery is greater than or equal to the first opening air pressure threshold value, judging that the battery protection device is opened at the target altitude;
and if the internal air pressure value of the battery is smaller than the first opening air pressure threshold value, determining that the battery protection device is not opened at the target altitude.
4. The method for testing a battery according to claim 3, wherein the obtaining the threshold of the opening air pressure of the battery protection device at the target altitude comprises:
acquiring a second starting air pressure threshold of the battery protection device under the standard atmospheric pressure according to the attribute information;
converting the second opening barometric pressure threshold to the first opening barometric pressure threshold at the target altitude.
5. A device for testing a battery, comprising:
a first acquisition module for acquiring a target altitude of a target area in which a battery is intended to be used;
the second acquisition module is used for acquiring the attribute information of the battery; wherein the attribute information includes material information of the battery and shape information of the battery;
the third acquisition module is used for acquiring the internal air pressure value of the battery according to the target altitude and the attribute information;
the judging module is used for judging whether a battery protection device in the battery is started under the target altitude according to the internal air pressure value; wherein the content of the first and second substances,
the obtaining the internal air pressure value of the battery according to the target altitude and the attribute information comprises:
acquiring a first air pressure value under the target altitude;
acquiring a first air pressure difference between the first air pressure value and a standard air pressure value;
acquiring the deformation amount of the battery under the first air pressure difference according to the first air pressure difference and the attribute information;
inquiring a first mapping relation between the deformation quantity and the internal air pressure value according to the deformation quantity of the battery to obtain the internal air pressure value of the battery;
the attribute information further includes size information of the battery, and before querying a first mapping relationship between the deformation amount and the internal air pressure value according to the deformation amount of the battery, the attribute information further includes:
according to the size information of the battery, carrying out gridding processing on the battery to obtain a plurality of battery units;
determining a value range and a preset step length of the internal relative pressure of the battery according to the material information of the battery;
applying relative pressure to the battery unit according to the preset step length in the value range, and acquiring the deformation and the pressure of the battery under each relative pressure;
and fitting the deformation quantity and the pressure of the battery under each relative pressure to obtain the first mapping relation of the battery.
6. A battery, comprising: the apparatus for testing a battery according to claim 5.
7. An electronic device comprising a memory, a processor;
wherein the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, for implementing the method of testing the battery according to any one of claims 1 to 4.
8. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method for testing a battery according to any one of claims 1 to 4.
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