CN109655186A - A kind of test method of battery modules expansive force - Google Patents
A kind of test method of battery modules expansive force Download PDFInfo
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- CN109655186A CN109655186A CN201811644548.4A CN201811644548A CN109655186A CN 109655186 A CN109655186 A CN 109655186A CN 201811644548 A CN201811644548 A CN 201811644548A CN 109655186 A CN109655186 A CN 109655186A
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- battery modules
- value
- expansion force
- force
- force value
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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Abstract
The present invention discloses a kind of test method of battery modules expansive force, multiple battery modules and expansion force test device are provided, change the size of one of value in the mould group quantitative value, initial pretightening force value and rate of charge value three of battery modules, by expansion force value of the battery modules in cyclic process of expansion force test device measurement at this value, the change curve of expansive force is obtained according to each expansion force value measured.By mould group quantitative value, initial pretightening force value and rate of charge the value influence to the expansion force value of battery modules respectively for measuring battery modules, the changing rule of the expansive force that battery modules can be intuitively obtained by obtaining the change curve of the expansive force of battery modules in battery modules cyclic process provides effective data and supports for the structure design and safe design of battery modules.
Description
Technical field
The present invention relates to the test method of battery modules expansive force more particularly to a kind of test sides of battery modules expansive force
Method.
Background technique
With the improvement of people's environmental awareness, being rapidly developed by the various equipment of power source of battery.It is raw in battery
It orders in the period, battery is carried out with the circulation of charge and discharge, and a certain proportion of expansion can be presented in battery volume.Battery is in cyclic process
In expansive force size in battery modules design structure and security performance it is most important, and influence in battery modules
The factor of the size of expansive force is many, and in the prior art, there is no to influence battery expansive force factor in cyclic process
It probes into.
Summary of the invention
It is an object of the invention to: a kind of test method of battery modules expansive force is provided, it is easy to operate, it can obtain
The change curve of battery expansive force in cyclic process provides reference for the production design of battery.
To reach this purpose, the invention adopts the following technical scheme:
A kind of test method of battery modules expansive force is provided, multiple battery modules and expansion force test device are provided,
The size for changing one of value in the mould group quantitative value, initial pretightening force value and rate of charge value three of battery modules, leads to
Expansion force value of the battery modules in cyclic process of the expansion force test device measurement at this value is crossed, according to measurement
The each expansion force value arrived obtains the change curve of expansive force.
The a preferred technical solution of test method as the battery modules expansive force controls all described
The initial pretightening force value and the rate of charge value of battery modules are identical, are measured by the expansion force test device different
The expansion force value of the battery modules of the mould group quantitative value of size, according to each expansion force value measured
The change curve of the expansive force is obtained, specifically includes the following steps:
Step S110: the battery modules with the mould group quantitative value of multiple and different sizes are made；
Step S120: the battery modules of each different size of mould group quantitative value are placed individually into described swollen
In the measured material of expansive force test device, the data sampling in the pressure sensor display instrument of the expansion force test device is set
Period and data display format；
Step S130: the positive and negative anodes of the corresponding battery modules are connect with charge-discharge test cabinet, pass through the expansion
The pressure sensor of force test device measures the expansion force value of each battery modules respectively, and reads the pressure and pass
The expansion force value in sensor display instrument；
Step S140: the expansive force is obtained according to the corresponding expansion force value of each different mould group quantitative value
Change curve.
The a preferred technical solution of test method as the battery modules expansive force, in the step S130
Step S131 is also set up between the step S140: periodically being exported and is expanded force value described in the pressure sensor display instrument,
And each expansion force value is analyzed, each expansion force value is proofreaded.
The a preferred technical solution of test method as the battery modules expansive force controls all described
The mould group quantitative value and the rate of charge value of battery modules are identical, successively apply to each battery modules different big
The small initial pretightening force value measures the different initial pretightening force state of value by the expansion force test device respectively
Under the battery modules the expansion force value, the change of the expansive force is obtained according to each expansion force value measured
Change curve, specifically includes the following steps:
Step S210: the multiple identical battery modules of production；
Each battery modules: being placed into the measured material of the expansion force test device by step S220 respectively,
The different size of initial pretightening force value is applied to the battery modules, and the pressure that the expansion force test device is arranged passes
Data sampling period and data display format in sensor display instrument；
Step S230: the positive and negative anodes of the corresponding battery modules are connect with the charge-discharge test cabinet, by described
Pressure sensor in expansion force test device measures the expansion force value of the battery modules respectively, and reads the pressure
The expansion force value in sensor display instrument；
Step S240: corresponding expansion force value is worth according to each different initial pretightening force and obtains the expansive force
Change curve.
The a preferred technical solution of test method as the battery modules expansive force, it is described swollen by adjusting
The position of the screw rod of expansive force test device applies the different size of initial pretightening force value to the battery modules.
The a preferred technical solution of test method as the battery modules expansive force, in the step S230
Step S231 is also set up between the step S240: periodically exporting the expansive force in the pressure sensor display instrument
Value, and each expansion force value is analyzed, each expansion force value is proofreaded.
The a preferred technical solution of test method as the battery modules expansive force, controls the battery
The mould group quantitative value and initial pretightening force value are identical, measure the battery modules by the expansion force test device and exist
The expansion force value under the different size of rate of charge value obtains the expansive force according to each expansion force value
Change curve, specifically includes the following steps:
Step S310: the multiple identical battery modules of production；
Each battery modules: being placed into the measured material of the expansion force test device by step S320 respectively,
And data sampling period and data display format in the pressure sensor display instrument of the expansion force test device are set；
Step S330: the positive and negative anodes of the battery modules are connect with the charge-discharge test cabinet, respectively described in the difference
It charges under rate of charge value to each battery modules, is distinguished by the pressure sensor of the expansion force test device
The measurement of the expansion force value of each battery modules is measured, and records the expansion force value；
Step S340: according to the corresponding expansion force value of the battery modules of each different rate of charge value
Obtain the change curve of the expansive force.
The a preferred technical solution of test method as the battery modules expansive force, in the step S330
Between the step S340, step S331 is also set up: periodically exporting and expand force value described in the pressure sensor display instrument, and
Each expansion force value is analyzed, each expansion force value is proofreaded.
The a preferred technical solution of test method as the battery modules expansive force is passing through the expansion
Before the pressure sensor of force test device measures the measurement of the expansion force value of each battery modules respectively, institute is adjusted
The screw rod of expansion force test device is stated, so that it is 35kgf that the screw rod, which applies the initial pretightening force value to the battery modules,.
The a preferred technical solution of test method as the battery modules expansive force, passes through the expansive force
Before expansion force value of the battery in cyclic process of test device measurement at this value, first measured material, pressure are passed
Sensor and pressure sensor display instrument assemble to form the expansion force test device.
The invention has the benefit that passing through mould group quantitative value, initial pretightening force value and the charging of measurement battery modules
The multiplier value influence to the expansion force value of battery modules respectively, in battery modules cyclic process can be by obtaining the battery
The change curve of the expansive force of mould group can intuitively obtain the changing rule of the expansive force of battery modules, set for the structure of battery modules
Meter and safe design provide effective data and support.
Detailed description of the invention
The present invention will be further described in detail below based on the drawings and embodiments.
Fig. 1 is the structural schematic diagram that force test device is expanded described in embodiment.
Fig. 2 is the change curve that the expansion force value is obtained according to each different mould group quantitative value.
Fig. 3 is the change curve that the expansion force value is obtained according to each different size of initial pretightening force value.
Fig. 4 is according to the corresponding expansion force value acquisition of the battery modules of each different rate of charge value
The change curve of expansive force.
Fig. 5 is the flow chart of expansive force test in the battery modules cyclic process of different size of mould group quantity.
Fig. 6 is battery modules expansive force test flow chart in cyclic process under different size of initial pretightening force value.
Fig. 7 is battery modules expansive force test flow chart in cyclic process under different size of rate of charge value.
In figure:
1, the first support plate；2, the second support plate；3, first end plate；4, the second end plate；5, pressure sensor；6, spring；
7, guide rod；8, screw rod；9, bottom plate；10, battery modules.
Specific embodiment
To keep the technical problems solved, the adopted technical scheme and the technical effect achieved by the invention clearer, below
It will the technical scheme of the embodiment of the invention will be described in further detail in conjunction with attached drawing, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
In the description of the present invention unless specifically defined or limited otherwise, term " connected ", " connection ", " fixation " are answered
It is interpreted broadly, for example, it may be being fixedly connected, may be a detachable connection, or is integral；It can be mechanical connection,
It can be electrical connection；It can be directly connected, the company inside two elements can also be can be indirectly connected through an intermediary
Logical or two elements interaction relationship.For the ordinary skill in the art, can be understood with concrete condition above-mentioned
The concrete meaning of term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
As shown in Figure 1, the present invention provides a kind of method for measuring the expansive force of 10 cyclic process of battery modules, provide
Multiple battery modules 10 and expansion force test device, change the mould group quantitative values of battery modules 10, initial pretightening force value and
The size of one of value in rate of charge value three passes through the battery of the expansion force test device measurement at this value
Expansion force value of the mould group 10 in cyclic process, the variation for obtaining expansive force according to each expansion force value measured are bent
Line.Wherein, by the expansion force test device measurement expansion force value of the battery in cyclic process at this value it
Before, first measured material, pressure sensor 5 and pressure sensor display instrument are assembled to form the expansion force test device.
By measuring mould group quantitative value, initial pretightening force value and the rate of charge value of battery modules 10 respectively to battery mould
Group 10 expansion force value influence, in 10 cyclic process of battery modules can be by obtaining the expansive force of the battery modules 10
Change curve, and then can intuitively obtain the changing rule of the expansive force of battery modules 10, be that the structure of battery modules 10 designs
Effective data are provided with safe design to support.
Embodiment one:
As shown in Figure 1, Figure 2 and shown in Fig. 5, in the present embodiment, the described initial pre- of all battery modules 10 is controlled
Clamp force value and the rate of charge value are identical, measure the different size of mould group quantitative value by the expansion force test device
The battery modules 10 the expansion force value, the change of the expansive force is obtained according to each expansion force value measured
Change curve, specifically includes the following steps:
Step S110: the battery modules 10 with the mould group quantitative value of multiple and different sizes are made.Each institute
State in battery modules 10 may include mould group quantitative value be one, two, three, four or five etc..In the present embodiment, respectively
Make three battery modules 10, wherein mould group quantity included in each battery modules 10 is respectively 1,6 and 12.
Preferably, the mould group quantitative value in each battery modules 10 is arithmetic progression, accurately swollen to obtain
The change curve of expansive force.
Step S111: it assembles measured material, pressure sensor 5 and pressure sensor display instrument to form the expansive force
Test device.
Step S120: the battery modules 10 of each different size of mould group quantitative value are placed individually into described
In the measured material for expanding force test device, the data being arranged in the pressure sensor display instrument of the expansion force test device are adopted
Sample period and data display format.In the present embodiment, the data sampling period in the pressure sensor display instrument is set
For 1min, the format that data are shown can be specifically arranged according to the size of the actual expansion force value of battery modules 10, to improve
The accuracy of reading in the pressure sensor display instrument.
Step S130: the positive and negative anodes of the corresponding battery modules 10 are connect with charge-discharge test cabinet, measure each institute
The expansion force value of the battery modules under mould group quantitative value is stated, and is read described in the pressure sensor display instrument
Expand force value.Specifically, in the present embodiment, pass through each battery of pressure sensor 5 of the expansion force test device
The expansion force value of mould group 10.The positive and negative anodes of each battery modules 10 are connect with charge-discharge test cabinet, so that battery modules
10 in cyclic process, it is ensured that the expansive force of battery modules 10 is measured under 10 recurrent state of battery modules.
Step S131: periodically exporting the expansion force value in the pressure sensor display instrument, and analyzes each described
Force value is expanded, each expansion force value is proofreaded.It in the present embodiment, will be in pressure sensor display instrument using USB flash disk
Each expansion force value export, reduces the requirement to equipment.By being proofreaded to the expansion force value, if at some
Significantly variation occurs for the corresponding expansion force value of the mould group quantitative value of the battery modules 10, and makes the variation of expansive force
Curve generation significantly rises or falls, then the expansion force value of the battery modules 10 under the mould group quantitative value is likely to be pressure
Sensor display instrument shake and caused by error in reading, repeat at least twice to the corresponding expansion force value of mould group quantitative value
It measures, to exclude the error of reading, improves the accuracy of the expansive force change curve.
But in other examples, directly computer can also be connect with pressure sensing display instrument, so that directly
The expansive force of the battery modules 10 is obtained on the computer.
Step S140: the expansive force is obtained according to the corresponding expansion force value of each different mould group quantitative value
The change curve of value, as shown in Figure 2.By the method, according to maximum swelling power of the battery modules 10 in cyclic process
With the variation tendency of expansive force, the relationship in battery modules 10 between battery core and expansive force can be found out, to be battery modules 10
Structure and safe design effective data are provided and are supported.
In the present embodiment, the initial pretightening force value of the application of each battery modules 10 is 110kgf.The electricity
Chi Mo group 10 in actual use, will receive certain pretightning force, in the present embodiment, apply initially to each battery modules 10
Pretightning force can simulated battery mould group 10 in actual use state, provide for the practical application of battery modules 10 with more practical
The reference value of meaning.
In the present embodiment, the expansion force test device includes measured material, pressure sensor 5 and pressure sensor
Display instrument, wherein the measured material includes first end plate 3, the second end plate 4, the first support plate 1, the second support plate 2, bottom plate
9, guide rod 7 and screw rod 8, wherein mesuring battary mould group 10 is between first end plate 3 and the second end plate 4, and bottom plate 9 is for branch
The battery modules 10 are supportted, first support plate 1 is located at the group of first end plate 3, battery modules 10 and the second end plate 4 composition
The side of fit horizontal direction, the bottom plate 9 are connect with second support plate 2, and the guide rod 7 is arranged in the horizontal direction,
And one end is fixedly connected on the first support plate 1 and the other end is fixedly connected on the second support plate 2, the guide rod 7 sequentially passes through
End plate 3, the second end plate 4 simultaneously enable first end plate 3 and the second end plate 4 to slide along guide rod 7.One end of screw rod 8 with it is described
First end plate 3 connects, and screw rod 8 is screwed on first support plate 1.Pressure sensor 5 is arranged in the second support plate 2 and second
Between end plate 4, spring 6 is provided on the pressure sensor 5, the spring 6 is used to receive the pressure of second end plate 4,
The pressure sensor display instrument is connect with the pressure sensor 5, the pressure value detected for showing pressure sensor 5.
Specific in use, by relative position of the turn screw rod 8 in first support plate 1, so that first end plate 3 is in level
Direction is moved along the direction close to second end plate 4, so that first end plate 3 and the second end plate 4 are to battery modules 10 to be measured
Implement to add initial pretightening force, for battery modules 10 during charge and discharge cycles, battery modules 10 expand deformation, so that second
End plate 4, towards the horizontal sliding of the second support plate 2, and drives spring 6 in pressure sensor 5 towards the second support plate 2 along guide rod 7
It moves horizontally, to measure expansive force of the battery modules 10 during charge and discharge cycles using pressure sensor 5.
Embodiment two:
As shown in Fig. 1, Fig. 3 and Fig. 6, in the present embodiment, the mould group number of all battery modules 10 is controlled
Magnitude and the rate of charge value are identical, successively apply the different size of initial pretightening force to each battery modules 10
Value, measures the battery modules 10 under the different initial pretightening force state of value by the expansion force test device respectively
The expansion force value, the change curve of the expansive force is obtained according to each expansion force value measured, is specifically included
Following steps:
Step S210: the multiple identical battery modules 10 of production, wherein the mould group in each battery modules 10
Quantity is identical.In the present embodiment, three identical battery modules 10 are made.
Step S211: it assembles measured material, pressure sensor 5 and pressure sensor display instrument to form the expansive force
Test device.
Step S220: each battery modules 10 are placed into the measured material of the expansion force test device respectively
In, the different size of initial pretightening force value is applied to the battery modules 10, and the expansion force test device is set
Data sampling period and data display format in pressure sensor display instrument.Specifically, to three battery modules 10
The initial pretightening force value of application is respectively 100kgf, 120kgf, 140kgf.In the present embodiment, the pressure sensor 5 is set
Display instrument in data sampling period be 1min, the format that data are shown can be according to the actual expansion force value of battery modules 10
Size and be specifically arranged, to improve the accuracy of the reading in the pressure sensor display instrument.
By adjusting the position of the screw rod 8 for expanding force test device to the battery modules in the step S220
10 apply different size of initial pretightening force value.It, can be by adjusting silk using an expansion force test device by the method
Bar 8 can adjust different initial pretightening forces to all battery modules 10, facilitate operation.
Step S230: the positive and negative anodes of the corresponding battery modules 10 are connect with the charge-discharge test cabinet, and measurement is each
The expansion force value of the battery modules 10 under a initial pretightening force value, and read the pressure sensor display instrument
In the expansion force value.Specifically, in the present embodiment, the pressure sensor 5 by the expansion force test device is each
The expansion force value of the battery modules 10.The positive and negative anodes of each battery modules 10 are connect with charge-discharge test cabinet, so that
Battery modules 10 are in cyclic process, it is ensured that the expansive force of battery modules 10 is measured under 10 recurrent state of battery modules.
Step S231: periodically exporting and expand force value described in the pressure sensor display instrument, and analyzes each described swollen
Expansive force value proofreads each expansion force value.It in the present embodiment, will be in pressure sensor display instrument using USB flash disk
Each expansion force value export, reduces the requirement to equipment.By being proofreaded to the expansion force value, if at some
Significantly variation occurs for the corresponding expansion force value of the mould group quantitative value of the battery modules 10, and makes the variation of expansive force
Curve generation significantly rises or falls, then the expansion force value of the battery modules 10 under the initial pretightening force value is possible to
Be pressure sensor display instrument shake and caused by error in reading, then repeat it is corresponding to the battery modules 10 at least twice
Expansion force value measures, and to reduce the error of reading, improves the accuracy of the expansive force change curve.
But in other examples, computer can also be connect with pressure sensing display instrument between, so that directly
The expansive force of the battery modules 10 is obtained on the computer.
Step S240: the change curve of the expansion force value is obtained according to each different size of initial pretightening force value
As shown in Figure 3.
By the method, according to maximum swelling power conjunction and the change of expansive force of the battery modules 10 in cyclic process
Change trend can find out the fixed optimal initial pretightning force branch of battery modules 10, so that the design of battery modules 10 more optimizes.
As shown in Figure 1, in the present embodiment, in the present embodiment, the expansion force test device includes measured material, pressure
Force snesor 5 and pressure sensor display instrument, wherein the measured material includes first end plate 3, the second end plate 4, first
Fagging 1, the second support plate 2, bottom plate 9, guide rod 7 and screw rod 8, wherein mesuring battary mould group 10 is located at first end plate 3 and second
Between end plate 4, bottom plate 9 is used to support the battery modules 10, and first support plate 1 is located at first end plate 3, battery modules 10
And second end plate 4 form assembly horizontal direction side, the bottom plate 9 is connect with second support plate 2, described
Guide rod 7 arranges in the horizontal direction, and one end is fixedly connected on the first support plate 1 and the other end is fixedly connected on the second support plate 2,
The guide rod 7 sequentially passes through first end plate 3, the second end plate 4 and keeps first end plate 3 and the second end plate 4 sliding along guide rod 7
It is dynamic.One end of screw rod 8 is connect with the first end plate 3, and screw rod 8 is screwed on first support plate 1.Pressure sensor 5 is set
It sets between the second support plate 2 and the second end plate 4, spring 6 is provided on the pressure sensor 5, the spring 6 is for receiving
The pressure of second end plate 4, the pressure sensor display instrument are connect with the pressure sensor 5, for showing that pressure passes
The pressure value that sensor 5 detects.Specific in use, passing through opposite position of the turn screw rod 8 in first support plate 1
It sets, so that first end plate 3 is moved along the direction close to second end plate 4 in the horizontal direction, so that first end plate 3 and second
End plate 4 implements to battery modules 10 to be measured plus initial pretightening force, and battery modules 10 are during charge and discharge cycles, battery modules 10
Deformation is expanded, so that the second end plate 4 is slided along guide rod 7 towards the second support plate 2 is horizontal, and is driven in pressure sensor 5
Spring 6 moved horizontally towards the second support plate 2, thus using pressure sensor 5 measure battery modules 10 in charge and discharge cycles
Expansive force in the process.
Embodiment three:
Such as Fig. 1, as shown in 4 and Fig. 7, in the present embodiment, control the battery the mould group quantitative value and it is described just
The preload force value that begins is identical, measures the battery modules 10 in the different size of charging times by the expansion force test device
The expansion force value under rate value obtains the change curve of the expansive force according to each expansion force value, specifically include with
Lower step:
Step S310: the multiple identical battery modules 10 of production；In the present embodiment, three identical battery modules are made
10。
Step S311: it assembles measured material, pressure sensor 5 and pressure sensor display instrument to form the expansive force
Test device.
Step S320: each battery modules 10 are placed into the measured material of the expansion force test device respectively
In, and data sampling period and data in the pressure sensor display instrument of the expansion force test device are set and show lattice
Formula.It specifically, is 35kgf to the actual initial pretightening force value of the battery modules of each group 10.The battery modules 10 are in reality
Border is in use, will receive certain pretightning force, and in the present embodiment, each battery modules 10 are applied initial pretightening force being capable of mould
Quasi- battery modules 10 have more the reference value being of practical significance in actual use state, for the practical raising of battery modules 10.
In the present embodiment, the data sampling period being arranged in the display instrument of the pressure sensor 5 is 1min, and data are aobvious
The format shown can be specifically arranged according to the size of the actual expansion force value of battery modules 10, to improve the pressure sensor
The accuracy of reading in display instrument.
Step S330: the positive and negative anodes of the battery modules 10 are connect with the charge-discharge test cabinet, respectively in different institutes
It states and charges under rate of charge value to each battery modules 10, measure the battery under each rate of charge value
The expansion force value of mould group 10, and record the expansion force value.Specifically, in the present embodiment, it is surveyed by the expansive force
The expansion force value of each battery modules 10 of the pressure sensor 5 that trial assembly is set.Wherein, in the S330, passing through
The pressure sensor 5 of the expansion force test device measures the measurement of the expansion force value of each battery modules 10 respectively
Before, adjust the screw rod 8 of the expansion force test device so that the screw rod 8 battery modules 10 are applied it is described initial
Pretightning force is value 35kgf.
Step S331: periodically exporting and expand force value described in the pressure sensor display instrument, and analyzes each described swollen
Expansive force value proofreads each expansion force value.It in the present embodiment, will be each in pressure sensor display instrument using USB flash disk
A expansion force value export, reduces the requirement to equipment.By being proofreaded to the expansion force value, if in some institute
Significantly variation occurs for the corresponding expansion force value for stating the mould group quantitative value of battery modules 10, and makes expansive force change curve
Generation significantly rises or falls, then the corresponding expansion force value of battery modules 10 under the electricity multiplier value is likely to be pressure biography
Sensor display instrument shake and caused by error in reading, then repeat at least twice to the corresponding expansion force value of battery modules 10
It measures, to reduce the error of reading, improves the accuracy of the expansive force change curve.
Step S340: according to the corresponding expansion of the battery modules 10 under each different rate of charge value
Force value obtains the change curve of the expansive force.
By this scheme, same battery modules 10 can be measured under different multiplying charging mechanism, battery modules 10
The variation tendency of expansive force, so that the structure and safe design for battery modules 10 provide effective data support.
Specifically, to by three battery modules 10 respectively 0.33C, 0.5C and 1C electric multiplying power to the battery
Mould group 10 charges, and measures the institute of the battery modules 10 respectively by the pressure sensor 5 of the expansion force test device
Expansion force value is stated, it is as shown in Figure 4 to obtain the corresponding expansion force value curve of each battery modules 10.
In the present embodiment such as Fig. 1, in the present embodiment, the expansion force test device includes measured material, pressure biography
Sensor 5 and pressure sensor display instrument, wherein the measured material includes first end plate 3, the second end plate 4, the first support plate
1, the second support plate 2, bottom plate 9, guide rod 7 and screw rod 8, wherein mesuring battary mould group 10 is located at first end plate 3 and the second end plate
Between 4, bottom plate 9 is used to support the battery modules 10, first support plate 1 be located at first end plate 3, battery modules 10 and
The side of the horizontal direction of the assembly of second end plate 4 composition, the bottom plate 9 are connect with second support plate 2, the guide rod
7 arrange in the horizontal direction, and one end is fixedly connected on the first support plate 1 and the other end is fixedly connected on the second support plate 2, it is described
Guide rod 7 sequentially passes through first end plate 3, the second end plate 4 and first end plate 3 and the second end plate 4 is enable to slide along guide rod 7.Silk
One end of bar 8 is connect with the first end plate 3, and screw rod 8 is screwed on first support plate 1.The setting of pressure sensor 5 is the
Between two support plates 2 and the second end plate 4, it is provided with spring 6 on the pressure sensor 5, the spring 6 is for receiving described the
The pressure of two end plates 4, the pressure sensor display instrument are connect with the pressure sensor 5, for showing that pressure sensor 5 is examined
The pressure value measured.Specific in use, by relative position of the turn screw rod 8 in first support plate 1, so that the
End plate 3 is moved along the direction close to second end plate 4 in the horizontal direction, so that first end plate 3 and the second end plate 4 are treated
It surveys battery modules 10 to implement to add initial pretightening force, during charge and discharge cycles, battery modules 10 expand battery modules 10
Deformation so that the second end plate 4 is slided along guide rod 7 towards the second support plate 2 is horizontal, and drives 6 court of spring in pressure sensor 5
It is moved horizontally to the second support plate 2, so that it is swollen during charge and discharge cycles to measure battery modules 10 using pressure sensor 5
Expansive force.
In the description of this article, it is to be understood that term " on ", "lower", " right side ", etc. orientation or positional relationships be based on
Orientation or positional relationship shown in the drawings is merely for convenience of description and simplification and operates, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.In addition, term " first ", " second " are only used to distinguish between description, have no special meaning.
In the description of this specification, the description of reference term " embodiment ", " example " etc. means to combine the embodiment
Or example particular features, structures, materials, or characteristics described are included at least one embodiment or example of the invention.?
In this specification, schematic expression of the above terms be may not refer to the same embodiment or example.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification be only be to understand device, those skilled in the art should
It considers the specification as a whole, the technical solutions in the embodiments can also be appropriately combined, and forming those skilled in the art can
With the other embodiments of understanding.
The technical principle of the invention is described above in combination with a specific embodiment.These descriptions are intended merely to explain of the invention
Principle, and shall not be construed in any way as a limitation of the scope of protection of the invention.Based on the explanation herein, the technology of this field
Personnel can associate with other specific embodiments of the invention without creative labor, these modes are fallen within
Within protection scope of the present invention.
Claims (10)
1. a kind of test method of battery modules expansive force, which is characterized in that provide multiple battery modules and expansive force test
Device changes in the mould group quantitative value, initial pretightening force value and rate of charge value three of battery modules the big of one of value
It is small, pass through expansion force value of the battery modules in cyclic process of the expansion force test device measurement at this value, root
The change curve of expansive force is obtained according to each expansion force value measured.
2. the test method of battery modules expansive force according to claim 1, which comprises the following steps:
Step S110: the battery modules with the mould group quantitative value of multiple and different sizes are made；
Step S120: the battery modules of each different size of mould group quantitative value are placed individually into the expansive force
In the measured material of test device, the data sampling period in the pressure sensor display instrument of the expansion force test device is set
And data display format；
Step S130: the positive and negative anodes of the corresponding battery modules are connect with charge-discharge test cabinet, measure each mould group
The expansion force value of the battery modules under quantitative value, and read the expansive force in the pressure sensor display instrument
Value；
Step S140: the change of the expansive force is obtained according to the corresponding expansion force value of each different mould group quantitative value
Change curve.
3. the test method of battery modules expansive force according to claim 2, which is characterized in that in the step S130 and
Step S131 is also set up between the step S140: periodically being exported and is expanded force value described in the pressure sensor display instrument, and
Each expansion force value is analyzed, each expansion force value is proofreaded.
4. the test method of battery modules expansive force according to claim 1, which comprises the following steps:
Step S210: the multiple identical battery modules of production；
Step S220: each battery modules are placed into respectively in the measured material of the expansion force test device, to institute
It states battery modules and applies the different size of initial pretightening force value, and the pressure sensor of the expansion force test device is set
Data sampling period and data display format in display instrument；
Step S230: the positive and negative anodes of the corresponding battery modules are connect with the charge-discharge test cabinet, are measured each described
The expansion force value of the battery modules under initial pretightening force value, and read described in the pressure sensor display instrument
Expand force value；
Step S240: the variation that corresponding expansion force value obtains the expansive force is worth according to each different initial pretightening force
Curve.
5. the test method of battery modules expansive force according to claim 4, in the step S220, by adjusting institute
The position for stating the screw rod of expansion force test device applies the different size of initial pretightening force value to the battery modules.
6. the test method of battery modules expansive force according to claim 4, which is characterized in that in the step S230 and
Step S231 is also set up between the step S240: periodically exporting the expansion force value in the pressure sensor display instrument,
And each expansion force value is analyzed, each expansion force value is proofreaded.
7. the test method of battery modules expansive force according to claim 1, which is characterized in that it is characterised in that it includes
Following steps:
Step S310: the multiple identical battery modules of production；
Step S320: each battery modules are placed into respectively in the measured material of the expansion force test device, and set
Set the data sampling period and data display format in the pressure sensor display instrument of the expansion force test device；
Step S330: the positive and negative anodes of the battery modules are connect with the charge-discharge test cabinet, respectively in the different chargings
It charges under multiplier value to each battery modules, measures the institute of the battery modules under each rate of charge value
Expansion force value is stated, and records the expansion force value；
Step S340: it is obtained according to the corresponding expansion force value of the battery modules under each different rate of charge value
Obtain the change curve of the expansive force.
8. the test method of battery modules expansive force according to claim 7, which is characterized in that in the step S330 institute
It states between step S340, also sets up step S331: periodically exporting and expand force value described in the pressure sensor display instrument, and point
Each expansion force value is analysed, each expansion force value is proofreaded.
9. the test method of battery modules expansive force according to claim 7, each described measuring in the S330
Before the expansion force value of battery modules, the screw rod of the expansion force test device is adjusted, so that the screw rod is to the electricity
It is 35kgf that Chi Mo group, which applies the initial pretightening force value,.
10. the test method of battery modules expansive force according to claim 1, which is characterized in that pass through the expansive force
Before expansion force value of the battery in cyclic process of test device measurement at this value, first measured material, pressure are passed
Sensor and pressure sensor display instrument assemble to form the expansion force test device.
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| CN113725505A (en) * | 2021-08-03 | 2021-11-30 | 天津市捷威动力工业有限公司 | Module expansion safety assessment method |
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