CN105954680B - The device and method of power battery heat power test - Google Patents
The device and method of power battery heat power test Download PDFInfo
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- CN105954680B CN105954680B CN201610285910.8A CN201610285910A CN105954680B CN 105954680 B CN105954680 B CN 105954680B CN 201610285910 A CN201610285910 A CN 201610285910A CN 105954680 B CN105954680 B CN 105954680B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
Abstract
The invention discloses a kind of device and method of power battery heat power test, wherein device includes: test device, for the test of power battery heat power, further comprising: thermal insulation material, aluminium foil and at least three temperature sensors；Logging modle, the temperature of power battery, thermal insulation material and aluminium foil when for recording power battery charge and discharge, to obtain the initial temperature and maximum temperature of power battery, thermal insulation material and aluminium foil；First computing module, for calculating the calorie value of power battery absorption；Second computing module, for calculating the calorie value of thermal insulation material absorption；Third computing module, the calorie value that calorie value and thermal insulation material for being absorbed according to power battery absorb calculate heat power of the power battery under default multiplying power.For the device of the embodiment of the present invention when calculating power battery heat power, precision is high, and economical.
Description
Technical field
The present invention relates to battery technology fields, and in particular to a kind of device and method of power battery heat power test.
Background technique
In the related technology, the common method of power battery heat power test includes two kinds.One is add in insulation such as ARC
It is tested in rate thermal instrument, but this method test spends height.Another kind be as in patent CN104569836A in a natural environment
Cell heat is divided into three parts by the temperature rise for testing battery, battery outer surface and natural convection air heat, battery surface and outer
The heat of radiations heat energy and the battery itself storage on boundary, the heat amount of battery are the sum of these three heats.But it is electric in this method
It is unknown that the heat of the convection transfer rate and battery outer surface of pool surface and environment penetrates coefficient, will cause calculated result there may be
Certain error.
Summary of the invention
The present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, of the invention
First purpose is to propose that a kind of device of power battery heat power test, the device are calculating power battery heat power
When, precision is high, and economical.
Second object of the present invention is a kind of method for proposing power battery heat power test.
To achieve the above object, the embodiment of first aspect present invention proposes a kind of power battery heat power test
Device, comprising: test device, for the test of power battery heat power, the test device further comprises: thermal insulating material
Material, aluminium foil and at least three temperature sensors, wherein the thermal insulation material is arranged in the four of power battery with the first preset thickness
The surrounding of the thermal insulation material, at least three temperature sensor difference are arranged in the second preset thickness for week, the aluminium foil
Power battery surface geometry center, 1/2 position of the first preset thickness of the thermal insulation material and the aluminium are set
Foil surface；Logging modle, for recording the power battery respectively with preset interval by the temperature sensor with default times
Rate carries out the temperature of the power battery, the thermal insulation material and the aluminium foil when charge and discharge, to obtain the power battery, institute
State the initial temperature and maximum temperature of thermal insulation material and the aluminium foil；First computing module, for according to the power battery
Initial temperature and maximum temperature calculate the calorie value that the power battery absorbs；Second computing module, for according to the power
Battery, the thermal insulation material, the initial temperature of the aluminium foil and maximum temperature calculate the calorie value that the thermal insulation material absorbs；With
And third computing module, the calorie value that calorie value and the thermal insulation material for being absorbed according to the power battery absorb calculate
Heat power of the power battery under the default multiplying power.
The device of power battery heat power test according to an embodiment of the present invention passes through setting for thermal insulation material and aluminium foil
It sets, when calculating power battery charge and discharge heat power, free-convection factor and power battery surface heat radiation hair can be reduced
It penetrates that rate is unknown and bring calculates error, improves computational accuracy, and economical.
In addition, the device of power battery heat power test according to the above embodiment of the present invention can also have it is following attached
The technical characteristic added:
According to one embodiment of present invention, first computing module, is specifically used for: by described in the calculating of following formula
The calorie value that power battery absorbs:
Qcell=Cp_cell·mcell·(Tcell_1-Tcell_0),
Wherein, QcellFor the calorie value that the power battery absorbs, Tcell_0、Tcell_1At the beginning of the respectively described power battery
Beginning temperature and maximum temperature, Cp_cellFor the specific heat capacity of the power battery, mcellFor the quality of the power battery.
According to one embodiment of present invention, second computing module, is specifically used for: by described in the calculating of following formula
The calorie value that thermal insulation material absorbs:
Wherein, QthFor the thermal insulation material absorb calorie value,For the mean initial temperature of the thermal insulation material,For the average maximum of the thermal insulation material, Cp_thFor the specific heat capacity of the thermal insulation material, mthFor the thermal insulation material
Quality.
According to one embodiment of present invention, describedIt is describedCalculation formula be respectively as follows:
Wherein, Tcell_0、Tth_0And TAl_0The initial temperature of the respectively described power battery, the thermal insulation material and the aluminium foil
Degree, Tcell_1、Tth_1And TAl_1The maximum temperature of the respectively described power battery, the thermal insulation material and the aluminium foil.
According to one embodiment of present invention, the third computing module, is specifically used for: by described in the calculating of following formula
Heat power of the power battery under the default multiplying power:
Wherein, P is heat power of the power battery under the default multiplying power, τ be when temperature reaches highest when
Between.
To achieve the above object, the embodiment of second aspect of the present invention proposes a kind of power battery heat power test
Method, based on the above embodiment in test device carry out power battery heat power test, comprising the following steps: by described
Temperature sensor power battery, institute when recording the power battery respectively with preset interval with default multiplying power progress charge and discharge
The temperature of thermal insulation material and affiliated aluminium foil is stated, to obtain the power battery, the thermal insulation material and the initial temperature of affiliated aluminium foil
Degree and maximum temperature；The heat that the power battery absorbs is calculated according to the initial temperature of the power battery and maximum temperature
Value；The thermal insulation material is calculated according to the power battery, the thermal insulation material, the initial temperature of the aluminium foil and maximum temperature
The calorie value of absorption；The calorie value that the calorie value and the thermal insulation material absorbed according to the power battery absorbs calculates described dynamic
Heat power of the power battery under the default multiplying power.
The method of power battery heat power test according to an embodiment of the present invention passes through setting for thermal insulation material and aluminium foil
It sets, when calculating power battery charge and discharge heat power, free-convection factor and power battery surface heat radiation hair can be reduced
It penetrates that rate is unknown and bring calculates error, improves computational accuracy, and economical.
In addition, the method for power battery heat power test according to the above embodiment of the present invention can also have it is following attached
The technical characteristic added:
According to one embodiment of present invention, described that institute is calculated according to the initial temperature and maximum temperature of the power battery
State the calorie value of power battery absorption, comprising: the calorie value that the power battery absorbs is calculated by following formula:
Qcell=Cp_cell·mcell·(Tcell_1-Tcell_0),
Wherein, QcellFor the calorie value that the power battery absorbs, Tcell_0、Tcell_1At the beginning of the respectively described power battery
Beginning temperature and maximum temperature, Cp_cellFor the thermal coefficient of the power battery, mcellFor the quality of the power battery.
According to one embodiment of present invention, it is described according to the power battery, the thermal insulation material, the aluminium foil just
Beginning temperature and maximum temperature calculate the calorie value that the thermal insulation material absorbs, comprising: calculate the thermal insulating material by following formula
Expect the calorie value absorbed:
Wherein, QthFor the thermal insulation material absorb calorie value,For the power battery, the thermal insulation material and institute
The mean initial temperature of aluminium foil is stated,For the average maximum of the power battery, the thermal insulation material and the aluminium foil,
Cp_thFor the thermal coefficient of the thermal insulation material, mthFor the quality of the thermal insulation material.
According to one embodiment of present invention, describedIt is describedCalculation formula be respectively as follows:
Wherein, Tcell_0、Tth_0And TAl_0The initial temperature of the respectively described power battery, the thermal insulation material and the aluminium foil
Degree, Tcell_1、Tth_1And TAl_1The maximum temperature of the respectively described power battery, the thermal insulation material and the aluminium foil.
According to one embodiment of present invention, the heat absorbed according to the power battery and the thermal insulation material are inhaled
Heat power of the power battery described in the heat Calculation of receipts under the default multiplying power, comprising: by described in the calculating of following formula
Heat power of the power battery under the default multiplying power:
Wherein, P is heat power of the power battery under the default multiplying power, τ be when temperature reaches highest when
Between.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the block diagram of the device of power battery heat power test according to an embodiment of the invention；
Fig. 2 is the schematic diagram of the device of power battery heat power test according to an embodiment of the present invention；
Fig. 3 is the flow chart of the method for power battery heat power test according to an embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the device and method of the power battery heat power test of the embodiment of the present invention are described.
Fig. 1 is the device of the power battery heat power test of the embodiment of the present invention.As shown in Figure 1, the device includes: to survey
10, logging modle 20, the first computing module 30, the second computing module 40 and third logging modle 50 are set in trial assembly.
Wherein, test device 10, the test for power battery heat power.As shown in Fig. 2, test device 10 is further
It include: thermal insulation material 11, aluminium foil 12 and at least three temperature sensors 13.
Specifically, the surrounding of power battery is arranged in the first preset thickness for thermal insulation material 11.
In one embodiment of the invention, the thermal coefficient of thermal insulation material 11 is less than 0.04W/ (mK) (i.e. watt/meter
Degree), it can be the mineral wool that thermal coefficient is 0.03W/ (mK).
It is understood that the setting of thermal insulation material 11 can simulate adiabatic environment, in power battery charge and discharge heat,
Partial heat can be absorbed.
The surrounding of thermal insulation material 11 is arranged in the second preset thickness for aluminium foil 12.
In one embodiment of the invention, the second preset thickness can be 0.15 μm, and radiation coefficient is known.
At least three temperature sensors 13 be separately positioned on power battery surface geometry center, thermal insulation material 11
12 surface of one preset thickness, 1/2 position and aluminium foil.
As shown in Fig. 2, in one embodiment of the invention, which may include 3 temperature sensors 13,
And 3 temperature sensors 13 are arranged on same straight line.
It should be noted that the setting position of temperature sensor 13 and quantity are not limited to one kind shown in Fig. 2.It is specific and
Speech, can according to need, positive and negative extreme in power battery, several temperature are arranged in 11 height of thermal insulation material and thickness direction
Sensor 13.
Logging modle 20 be used to record respectively by temperature sensor 13 with preset interval power battery with default multiplying power into
The temperature of power battery, thermal insulation material 11 and aluminium foil 12 when row charge and discharge, to obtain power battery, thermal insulation material 11 and aluminium foil 12
Initial temperature and maximum temperature.
First computing module 30 is used to calculate what power battery absorbed according to the initial temperature and maximum temperature of power battery
Calorie value.
Specifically, the first computing module 30 can calculate the calorie value that power battery absorbs by following formula (1):
Qcell=Cp_cell·mcell·(Tcell_1-Tcell_0) (1)
Wherein, QcellFor the calorie value that power battery absorbs, Tcell_0、Tcell_1Respectively the initial temperature of power battery and
Maximum temperature, Cp_cellFor the specific heat capacity of power battery, mcellFor the quality of power battery.
Second computing module 40 is used for initial temperature and maximum temperature according to power battery, thermal insulation material 11, aluminium foil 12
Calculate the calorie value that thermal insulation material absorbs.
Specifically, the second computing module 40 can calculate the calorie value that thermal insulation material absorbs by following formula (2):
Wherein, QthFor thermal insulation material absorb calorie value,For being averaged for power battery, thermal insulation material 11 and aluminium foil 12
Initial temperature,For the average maximum of power battery, thermal insulation material 11 and aluminium foil 12, Cp_thFor the ratio of thermal insulation material 12
Thermal capacitance, mthFor the quality of thermal insulation material 12.
In one embodiment of the invention,Calculation formula be respectively formula (3), formula (4):
Wherein, Tcell_0、Tth_0And TAl_0The respectively initial temperature of power battery, thermal insulation material 11 and aluminium foil 12,
Tcell_1、Tth_1And TAl_1The respectively maximum temperature of power battery, thermal insulation material 11 and aluminium foil 12.
Based on the calorie value that calorie value and thermal insulation material 11 of the third computing module 50 by being absorbed according to power battery absorb
Calculate heat power of the power battery under default multiplying power.
Specifically, third computing module 50 can calculate life of the power battery under default multiplying power by following formula (5)
Thermal power:
Wherein, P is heat power of the power battery under default multiplying power, and τ is time when temperature reaches highest.
For example, in one particular embodiment of the present invention, test is carried out in fact based on test device 10 shown in Fig. 2
It tests, power battery is 18650 battery cores, and thermal insulation material 11 is mineral wool, and the data that logging modle 20 records are as shown in table 1 below:
Table 1
As shown in table 1, preset interval 5min, Tcell_0、Tth_0、TAl_0Respectively 25.2 DEG C, 25.4 DEG C and 25.5 DEG C；
Tcell_1、Tth_1And TAl_145 DEG C, 33.9 DEG C and 25.8 when respectively 50min, then the mean initial temperature of thermal insulation material 11 and
Average maximumIt respectively 25.37 DEG C and 34.47 DEG C, is measured substantially with mineral wool thickness medium position
Tth_0And Tth_1It is close, illustrate mineral wool in thickness direction temperature distribution uniform.
It is understood that the temperature on power battery surface is the temperature of 11 inner surface of thermal insulation material, 12 surface of aluminium foil
Temperature be 11 outer surface of thermal insulation material temperature.
The calorie value of power battery absorption is calculated by the first computing module 30, heat preservation is calculated by the second computing module 40
The calorie value that material 11 absorbs is respectively as follows:
Qcell=Cp_cell·mcell·(Tcell_1-Tcell_0)=1410 (J/kg DEG C) * 0.045 (kg) * (45-25.2)
(DEG C)=1256.31 (J)
Then heat power are as follows:
It should be noted that above-described embodiment is only exemplary, power battery can be, but not limited to be lithium ion battery,
Nickel-metal hydride battery, shape can with but be not limited to above-mentioned 18650 cylindrical battery, can also be square battery and soft-package battery.
It, can be according to free convection environmental testing battery in patent CN104569836 in order to illustrate reasonability of the invention
Heat power method calculates 12 surface of aluminium foil and natural convection air heat dissipation capacity Qcell:
Wherein, A is aluminium foil surface product, and h is the coefficient of heat transfer of aluminium foil surface and natural convection air, the heat exchange of free convection
Coefficient h is generally 1-5W/ (m2K), the coefficient of heat transfer of the free convection under experimental condition used in the present invention is generally less than 2W/
(m2K), 2W/ (m can be selected in comparing calculation2·K).Environment temperature T is recorded in test∞It is 25.7 DEG C, then acquires free convection
Dissipated heat magnitude QconFor 50.88J.
Thermal exposure QradCalculation formula are as follows:
Wherein, ε is the radiant emissivity of aluminium foil 12, be 0.1, σ is this fence-Boltzmann constant of making a mistake, and is 5.67 × 10-
8W/(m2·K4), then calculate QradFor 0.0097J.
As can be seen that Natural Heat Convection amount and heat-radiation heat-dissipating amount account for battery itself respectively absorbs heat and thermal insulation material
The ratio for absorbing heat summation is 2.4% and 4.74e-4%, and accounting is very small, illustrates the power electric that the embodiment of the present invention proposes
The device of pond heat power test is reasonable.
The device of the power battery heat power test of the embodiment of the present invention, by the setting of thermal insulation material and aluminium foil,
When calculating power battery charge and discharge heat power, free-convection factor and power battery surface heat radiant emissivity can be reduced not
Know and bring calculating error, improves computational accuracy, and economical.
Fig. 3 is the flow chart of the method for the power battery heat power test of the embodiment of the present invention.
In an embodiment of the present invention, the method for the power battery heat power test is based on the above embodiment of the present invention
Power battery heat power test device in test device carry out.
As shown in figure 3, the method for the power battery heat power test includes:
S101 is recorded when power battery carries out charge and discharge with default multiplying power respectively with preset interval by temperature sensor and is moved
The temperature of power battery, thermal insulation material and affiliated aluminium foil, with obtain power battery, thermal insulation material and affiliated aluminium foil initial temperature and
Maximum temperature.
S102 calculates the calorie value that power battery absorbs according to the initial temperature of power battery and maximum temperature.
Specifically, the calorie value that power battery absorbs can be calculated by following formula (1):
Qcell=Cp_cell·mcell·(Tcell_1-Tcell_0) (1)
Wherein, QcellFor the calorie value that power battery absorbs, Tcell_0、Tcell_1Respectively the initial temperature of power battery and
Maximum temperature, Cp_cellFor the thermal coefficient of power battery, mcellFor the quality of power battery.
S103 calculates what thermal insulation material absorbed according to power battery, thermal insulation material, the initial temperature of aluminium foil and maximum temperature
Calorie value.
Specifically, the calorie value that thermal insulation material absorbs can be calculated by following formula (2):
Wherein, QthFor thermal insulation material absorb calorie value,For the average initial of power battery, thermal insulation material and aluminium foil
Temperature,For the average maximum of power battery, thermal insulation material and aluminium foil, Cp_thFor the thermal coefficient of thermal insulation material, mth
For the quality of thermal insulation material.
In one embodiment of the invention,Calculation formula be respectively such as following formula (3), formula (4):
Wherein, Tcell_0、Tth_0And TAl_0The respectively initial temperature of power battery, thermal insulation material and aluminium foil, Tcell_1、
Tth_1And TAl_1The respectively maximum temperature of power battery, thermal insulation material and aluminium foil.
S104, the calorie value that the calorie value and thermal insulation material absorbed according to power battery absorbs calculate power battery default
Heat power under multiplying power.
Specifically, heat power of the power battery under default multiplying power can be calculated by following formula (5):
Wherein, P is heat power of the power battery under default multiplying power, and τ is time when temperature reaches highest.
It should be noted that the specific embodiment of the method for the power battery heat power test of the embodiment of the present invention with
The specific embodiment of the device of the power battery heat power test of above-described embodiment is identical, in order to reduce redundancy, herein not
It repeats.
The method of the power battery heat power test of the embodiment of the present invention, by the setting of thermal insulation material and aluminium foil,
When calculating power battery charge and discharge heat power, free-convection factor and power battery surface heat radiant emissivity can be reduced not
Know and bring calculating error, improves computational accuracy, and economical.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (6)
1. a kind of device of power battery heat power test characterized by comprising
Test device, for the test of power battery heat power, the test device further comprises: thermal insulation material, aluminium foil
With three temperature sensors, wherein the surrounding of power battery, the aluminium foil are arranged in the first preset thickness for the thermal insulation material
The surrounding of the thermal insulation material is set with the second preset thickness, and three temperature sensors are separately positioned on the power electric
Pool surface geometric center position, 1/2 position of the first preset thickness of the thermal insulation material and the aluminium foil surface, and described three
Temperature sensor is arranged on same straight line；
Logging modle, for recorded respectively by the temperature sensor with preset interval the power battery with default multiplying power into
The temperature of the power battery, the thermal insulation material and aluminium foil when row charge and discharge, to obtain the power battery, the guarantor
The initial temperature and maximum temperature of adiabator and the aluminium foil；
First computing module is absorbed for calculating the power battery according to the initial temperature and maximum temperature of the power battery
Calorie value；
Second computing module, for the initial temperature and the highest temperature according to the power battery, the thermal insulation material, the aluminium foil
Degree calculates the calorie value that the thermal insulation material absorbs；And
Based on the calorie value that third computing module, calorie value by being absorbed according to the power battery and the thermal insulation material absorb
Calculate heat power of the power battery under the default multiplying power；
Wherein, second computing module, specifically for calculating the calorie value that the thermal insulation material absorbs by following formula:
Wherein, QthFor the thermal insulation material absorb calorie value,For the mean initial temperature of the thermal insulation material,For
The average maximum of the thermal insulation material, Cp_thFor the specific heat capacity of the thermal insulation material, mthFor the quality of the thermal insulation material,
It is describedIt is describedCalculation formula be respectively as follows:
Wherein, Tcell_0、Tth_0And TAl_0The initial temperature of the respectively described power battery, the thermal insulation material and the aluminium foil,
Tcell_1、Tth_1And TAl_1The maximum temperature of the respectively described power battery, the thermal insulation material and the aluminium foil.
2. the device of power battery heat power test according to claim 1, which is characterized in that described first calculates mould
Block is specifically used for:
The calorie value that the power battery absorbs is calculated by following formula:
Qcell=Cp_cell·mcell·(Tcell_1-Tcell_0),
Wherein, QcellFor the calorie value that the power battery absorbs, Tcell_0、Tcell_1The initial temperature of the respectively described power battery
Degree and maximum temperature, Cp_cellFor the specific heat capacity of the power battery, mcellFor the quality of the power battery.
3. the device of power battery heat power test according to claim 1, which is characterized in that the third calculates mould
Block is specifically used for:
Heat power of the power battery under the default multiplying power is calculated by following formula:
Wherein, P is heat power of the power battery under the default multiplying power, and τ is time when temperature reaches highest.
4. a kind of method of power battery heat power test, which is characterized in that be based on test device as described in claim 1
Power battery heat power test is carried out, the described method comprises the following steps:
The power battery is recorded respectively with preset interval by the temperature sensor, charge and discharge when institute is carried out with default multiplying power
The temperature of power battery, the thermal insulation material and affiliated aluminium foil is stated, to obtain the power battery, the thermal insulation material and affiliated
The initial temperature and maximum temperature of aluminium foil；
The calorie value that the power battery absorbs is calculated according to the initial temperature of the power battery and maximum temperature；
The thermal insulating material is calculated according to the power battery, the thermal insulation material, the initial temperature of the aluminium foil and maximum temperature
Expect the calorie value absorbed；
The calorie value that the calorie value and the thermal insulation material absorbed according to the power battery absorbs calculates the power battery and exists
Heat power under the default multiplying power；
Wherein, described that institute is calculated according to the power battery, the thermal insulation material, the initial temperature of the aluminium foil and maximum temperature
The calorie value for stating thermal insulation material absorption, including calculating the calorie value that the thermal insulation material absorbs by following formula:
Wherein, QthFor the power battery absorb calorie value,For the power battery, the thermal insulation material and the aluminium
The mean initial temperature of foil,For the average maximum of the power battery, the thermal insulation material and the aluminium foil, Cp_th
For the thermal coefficient of the thermal insulation material, mthIt is described for the quality of the thermal insulation materialIt is describedCalculation formula point
Not are as follows:
Wherein, Tcell_0、Tth_0And TAl_0The initial temperature of the respectively described power battery, the thermal insulation material and the aluminium foil,
Tcell_1、Tth_1And TAl_1The maximum temperature of the respectively described power battery, the thermal insulation material and the aluminium foil.
5. the method for power battery heat power test according to claim 4, which is characterized in that described according to described dynamic
The initial temperature and maximum temperature of power battery calculate the calorie value that the power battery absorbs, comprising:
The calorie value that the power battery absorbs is calculated by following formula:
Qcell=Cp_cell·mcell·(Tcell_1-Tcell_0),
Wherein, QcellFor the calorie value that the power battery absorbs, Tcell_0、Tcell_1The initial temperature of the respectively described power battery
Degree and maximum temperature, Cp_cellFor the thermal coefficient of the power battery, mcellFor the quality of the power battery.
6. the method for power battery heat power test according to claim 4, which is characterized in that described according to described dynamic
Life of the power battery under the default multiplying power described in the heat Calculation that the heat and the thermal insulation material that power battery absorbs absorb
Thermal power, comprising:
Heat power of the power battery under the default multiplying power is calculated by following formula:
Wherein, P is heat power of the power battery under the default multiplying power, and τ is time when temperature reaches highest.
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|---|---|---|---|---|
| CN106768491A (en) * | 2017-01-08 | 2017-05-31 | 北京工业大学 | A kind of monocell heating power test device and method |
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