CN105954680A - Power battery heating power test device and method - Google Patents

Abstract

The invention discloses a power battery heating power test device and method. The device comprises a test device used for power battery heating power test and furthermore comprising insulation materials, aluminum foil and at least three temperature sensors; a recording module used for recording temperatures of the power battery, the insulation materials and the aluminum foil when a power battery charges and discharges so as to obtain the initial temperature and highest temperature of the power battery, the insulation materials and the aluminum foil; a first calculating module used for calculating the value of caloric absorbed by the power battery; a second calculating module used for calculating the value of caloric absorbed by the insulation materials; and a third calculating module used for calculating the heating power of the power battery under preset multiplying power according to the value of caloric absorbed by the power battery and the value of caloric absorbed by the insulation materials. The device has the characteristics of high precision and economy in calculating power battery heating power.

Description

The apparatus and method of electrokinetic cell heat power test

Technical field

The present invention relates to cell art, be specifically related to the apparatus and method of a kind of electrokinetic cell heat power test.

Background technology

In correlation technique, the common method of electrokinetic cell heat power test includes two kinds.One is in adiabatic acceleration such as ARC Calorimetric instrument is tested, but the method test spends height.Another kind is as surveyed under natural environment in patent CN104569836A The temperature rise of examination battery, is divided into three parts by cell heat, and battery outer surface and natural convection air heat, battery surface are with outer The radiations heat energy on boundary and the heat of battery self storage, the heat amount of battery is these three heat sum.But electricity in the method It is unknown that pool surface and the convection transfer rate of environment and the heat of battery outer surface penetrate coefficient, and result of calculation can be caused to there may be Certain error.

Summary of the invention

It is contemplated that one of technical problem solved the most to a certain extent in above-mentioned technology.To this end, the first of the present invention Individual purpose is to propose the device of a kind of electrokinetic cell heat power test, this device calculate electrokinetic cell heat power time, Precision is high, and economical.

A kind of method that second object of the present invention is to propose electrokinetic cell heat power test.

For achieving the above object, the embodiment of first aspect present invention proposes the device of a kind of electrokinetic cell heat power test, Including: test device, for the test of electrokinetic cell heat power, described test device farther includes: insulation material, Aluminium foil and at least three temperature sensor, wherein, described insulation material is arranged on the surrounding of electrokinetic cell with the first preset thickness, Described aluminium foil is arranged on the surrounding of described insulation material with the second preset thickness, and temperature sensor described at least three is respectively provided with In described electrokinetic cell surface geometry center, the first preset thickness 1/2 position of described insulation material and described aluminium foil table Face；Logging modle, enters with default multiplying power for recording described electrokinetic cell by described temperature sensor respectively with predetermined interval Described electrokinetic cell, described insulation material and the temperature of described aluminium foil during row discharge and recharge, to obtain described electrokinetic cell, described Insulation material and the initial temperature of described aluminium foil and maximum temperature；First computing module, at the beginning of according to described electrokinetic cell Beginning temperature and maximum temperature calculate the caloric value that described electrokinetic cell absorbs；Second computing module, for according to described power current Pond, described insulation material, the initial temperature of described aluminium foil and maximum temperature calculate the caloric value that described insulation material absorbs；With And the 3rd computing module, the caloric value absorbed for the caloric value absorbed according to described electrokinetic cell and described insulation material calculates Described electrokinetic cell heat power under described default multiplying power.

The device of electrokinetic cell heat power test according to embodiments of the present invention, by insulation material and the setting of aluminium foil, When calculating electrokinetic cell discharge and recharge heat power, it is possible to minimizing free-convection factor and electrokinetic cell surface heat radiant emissivity are not The calculating error known and bring, improves computational accuracy, and economical.

It addition, the device of electrokinetic cell heat power test according to the above embodiment of the present invention can also have following additional Technical characteristic:

According to one embodiment of present invention, described first computing module, specifically for: calculated described dynamic by equation below The caloric value that power battery absorbs:

Q_cell=C_{p_cell}·m_cell·(T_{cell_1}-T_{cell_0}),

Wherein, Q_cellThe caloric value absorbed for described electrokinetic cell, T_{cell_0}、T_{cell_1}It is respectively the initial temperature of described electrokinetic cell Degree and maximum temperature, C_{p_cell}For the specific heat capacity of described electrokinetic cell, m_cellQuality for described electrokinetic cell.

According to one embodiment of present invention, described second computing module, specifically for: calculated described dynamic by equation below The caloric value that power battery absorbs:

$Q_{th}=C_{p\_th}\·m_{th}\·({\stackrel{\‾}{T}}_{th\_1}-{\stackrel{\‾}{T}}_{th\_0}),$

Wherein, Q_thThe caloric value absorbed for described electrokinetic cell,For the mean initial temperature of described insulation material, For the average maximum of described insulation material, C_{p_th}For the specific heat capacity of described insulation material, m_thFor described insulation material Quality.

According to one embodiment of present invention, describedDescribedComputing formula be respectively as follows:

${\stackrel{\‾}{T}}_{th\_0}=\frac{T_{cell\_0}+T_{th\_0}+T_{Al\_0}}{3},$

${\stackrel{\‾}{T}}_{th\_1}=\frac{T_{cell\_1}+T_{th\_1}+T_{Al\_1}}{3},$

Wherein, T_{cell_0}、T_{th_0}And T_{Al_0}It is respectively described electrokinetic cell, described insulation material and the initial temperature of described aluminium foil, T_{cell_1}、T_{th_1}And T_{Al_1}It is respectively described electrokinetic cell, described insulation material and the maximum temperature of described aluminium foil.

According to one embodiment of present invention, described 3rd computing module, specifically for: calculated described dynamic by equation below Power battery heat power under described default multiplying power:

$P=\frac{Q_{cell}+Q_{th}}{\mathrm{\τ}},$

Wherein, P is described electrokinetic cell heat power under described default multiplying power, and τ is temperature time when reaching the highest.

For achieving the above object, the embodiment of second aspect present invention proposes a kind of method of electrokinetic cell heat power test, Carry out electrokinetic cell heat power test based on the test device in above-described embodiment, comprise the following steps: by described temperature Sensor records described electrokinetic cell, described guarantor when described electrokinetic cell carries out discharge and recharge with default multiplying power respectively with predetermined interval Adiabator and the temperature of affiliated aluminium foil, with obtain described electrokinetic cell, described insulation material and the initial temperature of affiliated aluminium foil and Maximum temperature；Initial temperature and maximum temperature according to described electrokinetic cell calculate the caloric value that described electrokinetic cell absorbs；Root Calculate described insulation material according to described electrokinetic cell, described insulation material, the initial temperature of described aluminium foil and maximum temperature to absorb Caloric value；The caloric value that the caloric value absorbed according to described electrokinetic cell and described insulation material absorb calculates described power current Pond heat power under described default multiplying power.

The method of electrokinetic cell heat power test according to embodiments of the present invention, by insulation material and the setting of aluminium foil, When calculating electrokinetic cell discharge and recharge heat power, it is possible to minimizing free-convection factor and electrokinetic cell surface heat radiant emissivity are not The calculating error known and bring, improves computational accuracy, and economical.

It addition, the method for electrokinetic cell heat power test according to the above embodiment of the present invention can also have following additional Technical characteristic:

According to one embodiment of present invention, the described initial temperature according to described electrokinetic cell and maximum temperature calculate described dynamic Power battery absorb caloric value, including: by equation below calculate described electrokinetic cell absorb caloric value:

Q_cell=C_{p_cell}·m_cell·(T_{cell_1}-T_{cell_0}),

Wherein, Q_cellThe caloric value absorbed for described electrokinetic cell, T_{cell_0}、T_{cell_1}It is respectively the initial temperature of described electrokinetic cell Degree and maximum temperature, C_{p_cell}For the heat conductivity of described electrokinetic cell, m_cellQuality for described electrokinetic cell.

According to one embodiment of present invention, described according to described electrokinetic cell, described insulation material, described aluminium foil initial Temperature and maximum temperature calculate the caloric value that described insulation material absorbs, including: calculate described electrokinetic cell by equation below The caloric value absorbed:

$Q_{th}=C_{p\_th}\·m_{th}\·({\stackrel{\‾}{T}}_{th\_1}-{\stackrel{\‾}{T}}_{th\_0}),$

Wherein, Q_thThe caloric value absorbed for described electrokinetic cell,For described electrokinetic cell, described insulation material and described The mean initial temperature of aluminium foil,For described electrokinetic cell, described insulation material and the average maximum of described aluminium foil, C_{p_th}For the heat conductivity of described insulation material, m_thQuality for described insulation material.

According to one embodiment of present invention, describedDescribedComputing formula be respectively as follows:

${\stackrel{\‾}{T}}_{th\_0}=\frac{T_{cell\_0}+T_{th\_0}+T_{Al\_0}}{3},$

${\stackrel{\‾}{T}}_{th\_1}=\frac{T_{cell\_1}+T_{th\_1}+T_{Al\_1}}{3},$

Wherein, T_{cell_0}、T_{th_0}And T_{Al_0}It is respectively described electrokinetic cell, described insulation material and the initial temperature of described aluminium foil, T_{cell_1}、T_{th_1}And T_{Al_1}It is respectively described electrokinetic cell, described insulation material and the maximum temperature of described aluminium foil.

According to one embodiment of present invention, the described heat absorbed according to described electrokinetic cell and described insulation material absorb The heat power under described default multiplying power of the electrokinetic cell described in heat Calculation, including: calculate described power by equation below Battery heat power under described default multiplying power:

$P=\frac{Q_{all}}{\mathrm{\τ}}=\frac{Q_{cell}+Q_{th}}{\mathrm{\τ}},$

Wherein, P is described electrokinetic cell heat power under described default multiplying power, and τ is temperature time when reaching the highest.

Accompanying drawing explanation

Above-mentioned and/or the additional aspect of the present invention and advantage will be apparent from from combining the accompanying drawings below description to embodiment With easy to understand, wherein:

Fig. 1 is the block diagram of the device of electrokinetic cell heat power test according to an embodiment of the invention；

Fig. 2 is the schematic diagram of the device of electrokinetic cell heat power test according to embodiments of the present invention；

Fig. 3 is the flow chart of the method for electrokinetic cell heat power test according to an embodiment of the invention.

Detailed description of the invention

Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.

Below with reference to the accompanying drawings the apparatus and method of the electrokinetic cell heat power test of the embodiment of the present invention are described.

Fig. 1 is the device of the electrokinetic cell heat power test of the embodiment of the present invention.As it is shown in figure 1, this device includes: survey Electricity testing device 10, logging modle the 20, first computing module the 30, second computing module 40 and the 3rd logging modle 50.

Wherein, device 10 is tested, for the test of electrokinetic cell heat power.As in figure 2 it is shown, test device 10 enters one Step includes: insulation material 11, aluminium foil 12 and at least three temperature sensor 13.

Specifically, insulation material 11 is arranged on the surrounding of electrokinetic cell with the first preset thickness.

In one embodiment of the invention, the heat conductivity of insulation material 11 less than 0.04W/ (m K) (i.e. watt/ Meter Du), can be heat conductivity be the glass cotton of 0.03W/ (m K).

It is understood that arranging of insulation material 11 can simulate adiabatic environment, when electrokinetic cell discharge and recharge heat, energy Enough absorb partial heat.

Aluminium foil 12 is arranged on the surrounding of insulation material 11 with the second preset thickness.

In one embodiment of the invention, the second preset thickness can be 0.15 μm, and its radiation coefficient is known.

At least three temperature sensor 13 be separately positioned on electrokinetic cell surface geometry center, the first of insulation material 11 Preset thickness 1/2 position and aluminium foil 12 surface.

As in figure 2 it is shown, in one embodiment of the invention, this test device 10 can include 3 temperature sensors 13, And 3 temperature sensors 13 are arranged on same straight line.

It should be noted that temperature sensor 13 position is set and quantity is not limited to the one shown in Fig. 2.Specifically, Can be positive and negative extremely at electrokinetic cell as required, several temperature are set along insulation material 11 height and thickness direction and pass Sensor 13.

Logging modle 20 is filled with default multiplying power for recording electrokinetic cell by temperature sensor 13 respectively with predetermined interval Electrokinetic cell, insulation material 11 and the temperature of aluminium foil 12 during electric discharge, to obtain electrokinetic cell, insulation material 11 and aluminium foil The initial temperature of 12 and maximum temperature.

First computing module 30 calculates, for the initial temperature according to electrokinetic cell and maximum temperature, the heat that electrokinetic cell absorbs Value.

Specifically, the first computing module 30 can pass through equation below (1) calculate electrokinetic cell absorb caloric value:

Q_cell=C_{p_cell}·m_cell·(T_{cell_1}-T_{cell_0}) (1)

Wherein, Q_cellThe caloric value absorbed for electrokinetic cell, T_{cell_0}、T_{cell_1}It is respectively the initial temperature of electrokinetic cell and the highest Temperature, C_{p_cell}For the specific heat capacity of electrokinetic cell, m_cellQuality for electrokinetic cell.

Second computing module 40 is for according to electrokinetic cell, insulation material 11, the initial temperature of aluminium foil 12 and maximum thermometer Calculate the caloric value that insulation material absorbs.

Specifically, the second computing module 40 can pass through equation below (2) calculate electrokinetic cell absorb caloric value:

$Q_{th}=C_{p\_th}\·m_{th}\·({\stackrel{\‾}{T}}_{th\_1}-{\stackrel{\‾}{T}}_{th\_0})---\left(2\right)$

Wherein, Q_thThe caloric value absorbed for electrokinetic cell,Average for electrokinetic cell, insulation material 11 and aluminium foil 12 Initial temperature,For electrokinetic cell, insulation material 11 and the average maximum of aluminium foil 12, C_{p_th}For insulation material 12 Specific heat capacity, m_thQuality for insulation material 12.

In one embodiment of the invention,Computing formula be respectively formula (3), formula (4):

${\stackrel{\‾}{T}}_{th\_0}=\frac{T_{cell\_0}+T_{th\_0}+T_{Al\_0}}{3}---\left(3\right)$

${\stackrel{\‾}{T}}_{th\_1}=\frac{T_{cell\_1}+T_{th\_1}+T_{Al\_1}}{3}---\left(4\right)$

Wherein, T_{cell_0}、T_{th_0}And T_{Al_0}It is respectively electrokinetic cell, insulation material 11 and the initial temperature of aluminium foil 12, T_{cell_1}、 T_{th_1}And T_{Al_1}It is respectively electrokinetic cell, insulation material 11 and the maximum temperature of aluminium foil 12.

3rd computing module 50 calculates dynamic for the caloric value that the caloric value absorbed according to electrokinetic cell and insulation material 11 absorb Power battery heat power under default multiplying power.

Specifically, the 3rd computing module 50 can pass through equation below (5) calculating electrokinetic cell heat under default multiplying power Power:

$P=\frac{Q_{cell}+Q_{th}}{\mathrm{\τ}}---\left(5\right)$

Wherein, P is electrokinetic cell heat power under default multiplying power, and τ is temperature time when reaching the highest.

For example, in one particular embodiment of the present invention, test experiments is carried out based on the test device 10 shown in Fig. 2, Electrokinetic cell is 18650 battery cores, and insulation material 11 is glass cotton, and the data of logging modle 20 record are as shown in table 1 below:

Table 1

As shown in table 1, predetermined interval is 5min, T_{cell_0}、T_{th_0}、T_{Al_0}It is respectively 25.2 DEG C, 25.4 DEG C and 25.5 DEG C； T_{cell_1}、T_{th_1}And T_{Al_1}It is respectively 45 DEG C, 33.9 DEG C and 25.8 during 50min, the then average initial temperature of insulation material 11 Degree and average maximumIt is respectively 25.37 DEG C and 34.47 DEG C, substantially records with glass cotton thickness medium position T_{th_0}And T_{th_1}Close, illustrate that glass cotton is in thickness direction temperature distribution uniform.

It is understood that the temperature on electrokinetic cell surface is the temperature of insulation material 11 inner surface, aluminium foil 12 surface Temperature is the temperature of insulation material 11 outer surface.

Calculate the caloric value of electrokinetic cell absorption by the first computing module 30, calculate thermal insulating material by the second computing module 40 The caloric value of material 11 absorption is respectively as follows:

Q_cell=C_{p_cell}·m_cell·(T_{cell_1}-T_{cell_0})=1410 (J/kg DEG C) * 0.045 (kg) * (45-25.2) (DEG C)=1256.31 (J)

Then heat power is:

It should be noted that above-described embodiment is exemplary, electrokinetic cell can be, but not limited to be lithium ion battery, nickel Hydrogen battery, shape can but be not limited to above-mentioned 18650 cylindrical batteries, it is also possible to be square battery and soft-package battery.

In order to the reasonability of the present invention is described, can be according to free convection environmental testing battery heat in patent CN104569836 Power method, calculates aluminium foil 12 surface and natural convection air heat dissipation capacity Q_cell:

$Q_{con}={\mathrm{hAf}}_0^t(T_{A1}-T_{\mathrm{\∞}})dt$

Wherein, A is that aluminium foil surface amasss, and h is the coefficient of heat transfer of aluminium foil surface and natural convection air, the heat exchange system of free convection Number h is generally 1-5W/ (m²K), the coefficient of heat transfer of the free convection under experimental condition used by the present invention is generally less than 2 W/(m²K), comparing calculation can be selected for 2W/ (m²·K).Test records ambient temperature T_∞It is 25.7 DEG C, then tries to achieve Free convection dissipated heat value Q_conFor 50.88J.

Thermal exposure Q_radComputing formula be:

$Q_{rad}=A\·\mathrm{\ϵ}\·\mathrm{\σ}\·f_0^t(T_{Al}^4-T_{\mathrm{\∞}}^4)dt$

Wherein, ε is the radiant emissivity of aluminium foil 12, is 0.1, and σ is this fence-Boltzmann constant of making a mistake, and is 5.67 × 10-8 W/(m²·K⁴), then calculate Q_radFor 0.0097J.

It can be seen that Natural Heat Convection amount and heat-radiation heat-dissipating amount account for battery own absorption heat respectively and insulation material absorbs The ratio of heat summation is 2.4% and 4.74e-4%, and accounting is the least, and the electrokinetic cell heat that the embodiment of the present invention proposes is described The device of power test is reasonable.

The device of the electrokinetic cell heat power test of the embodiment of the present invention, by insulation material and the setting of aluminium foil, is calculating During electrokinetic cell discharge and recharge heat power, it is possible to reduce free-convection factor and electrokinetic cell surface heat radiant emissivity unknown and The calculating error brought, improves computational accuracy, and economical.

Fig. 3 is the flow chart of the method for the electrokinetic cell heat power test of the embodiment of the present invention.

In an embodiment of the present invention, the method for this electrokinetic cell heat power test is based on the above embodiment of the present invention dynamic Test device in the device of power battery heat power test is carried out.

As it is shown on figure 3, the method for this electrokinetic cell heat power test includes:

S101, records power current when electrokinetic cell carries out discharge and recharge with default multiplying power respectively by temperature sensor with predetermined interval Pond, insulation material and the temperature of affiliated aluminium foil, to obtain electrokinetic cell, insulation material and the initial temperature of affiliated aluminium foil and High-temperature.

S102, initial temperature and maximum temperature according to electrokinetic cell calculate the caloric value that electrokinetic cell absorbs.

Specifically, can pass through equation below (1) calculate electrokinetic cell absorb caloric value:

Q_cell=C_{p_cell}·m_cell·(T_{cell_1}-T_{cell_0}) (1)

Wherein, Q_cellThe caloric value absorbed for electrokinetic cell, T_{cell_0}、T_{cell_1}It is respectively the initial temperature of electrokinetic cell and the highest Temperature, C_{p_cell}For the heat conductivity of electrokinetic cell, m_cellQuality for electrokinetic cell.

S103, calculates, according to electrokinetic cell, insulation material, the initial temperature of aluminium foil and maximum temperature, the heat that insulation material absorbs Value.

Specifically, can pass through equation below (2) calculate electrokinetic cell absorb caloric value:

$Q_{th}=C_{p\_th}\·m_{th}\·(T_{th\_1}-{\stackrel{\‾}{T}}_{th\_0})---\left(2\right)$

Wherein, Q_thThe caloric value absorbed for electrokinetic cell,Average initial temperature for electrokinetic cell, insulation material and aluminium foil Degree,For the average maximum of electrokinetic cell, insulation material and aluminium foil, C_{p_th}For the heat conductivity of insulation material, m_th Quality for insulation material.

In one embodiment of the invention,Computing formula be respectively such as following formula (3), formula (4):

${\stackrel{\‾}{T}}_{th\_0}=\frac{T_{cell\_0}+T_{th\_0}+T_{Al\_0}}{3}---\left(3\right)$

${\stackrel{\‾}{T}}_{th\_1}=\frac{T_{cell\_1}+T_{th\_1}+T_{Al\_1}}{3}---\left(4\right)$

Wherein, T_{cell_0}、T_{th_0}And T_{Al_0}It is respectively electrokinetic cell, insulation material and the initial temperature of aluminium foil, T_{cell_1}、T_{th_1} And T_{Al_1}It is respectively electrokinetic cell, insulation material and the maximum temperature of aluminium foil.

The caloric value that S104, the caloric value absorbed according to electrokinetic cell and insulation material absorb calculates electrokinetic cell in default multiplying power Under heat power.

Specifically, can pass through equation below (5) calculate electrokinetic cell heat power under default multiplying power:

$P=\frac{Q_{all}}{\mathrm{\τ}}=\frac{Q_{cell}+Q_{th}}{\mathrm{\τ}}---\left(5\right)$

Wherein, P is electrokinetic cell heat power under default multiplying power, and τ is temperature time when reaching the highest.

It should be noted that the detailed description of the invention of the method for the electrokinetic cell heat power test of the embodiment of the present invention is with above-mentioned The detailed description of the invention of the device of the electrokinetic cell heat power test of embodiment is identical, in order to reduce redundancy, does not the most do superfluous State.

The method of the electrokinetic cell heat power test of the embodiment of the present invention, by insulation material and the setting of aluminium foil, is calculating During electrokinetic cell discharge and recharge heat power, it is possible to reduce free-convection factor and electrokinetic cell surface heat radiant emissivity unknown and The calculating error brought, improves computational accuracy, and economical.

In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " footpath To ", the orientation of the instruction such as " circumferential " or position relationship be based on orientation shown in the drawings or position relationship, merely to just In describe the present invention and simplifying describe rather than instruction or the hint device of indication or element must have specific orientation, with Specific azimuth configuration and operation, be therefore not considered as limiting the invention.

Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or imply relatively important Property or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", " second " feature permissible Express or implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, Such as two, three etc., unless otherwise expressly limited specifically.

In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " Gu Fixed " etc. term should be interpreted broadly, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can To be mechanical connection, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, permissible It is connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction.For this area For those of ordinary skill, above-mentioned term concrete meaning in the present invention can be understood as the case may be.

In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can Being that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, the One feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or Oblique upper, or it is merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or it is special to be merely representative of first Levy level height less than second feature.

In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " tool Body example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material Material or feature are contained at least one embodiment or the example of the present invention.In this manual, the signal to above-mentioned term Property statement be necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or spy Point can be to combine in one or more embodiments in office or example in an appropriate manner.Additionally, in the case of the most conflicting, Those skilled in the art can be by the different embodiments described in this specification or example and different embodiment or the spy of example Levy and be combined and combine.

Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary, Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment It is changed, revises, replaces and modification.

Claims (10)

1. the device of an electrokinetic cell heat power test, it is characterised in that including:

Test device, for the test of electrokinetic cell heat power, described test device farther includes: insulation material, aluminum Paper tinsel and at least three temperature sensor, wherein, described insulation material is arranged on the surrounding of electrokinetic cell with the first preset thickness, Described aluminium foil is arranged on the surrounding of described insulation material with the second preset thickness, and temperature sensor described at least three is respectively provided with In described electrokinetic cell surface geometry center, the first preset thickness 1/2 position of described insulation material and described aluminium foil table Face；

Logging modle, enters with default multiplying power for recording described electrokinetic cell by described temperature sensor respectively with predetermined interval Described electrokinetic cell, described insulation material and the temperature of described aluminium foil during row discharge and recharge, to obtain described electrokinetic cell, described Insulation material and the initial temperature of described aluminium foil and maximum temperature；

First computing module, calculates described electrokinetic cell for the initial temperature according to described electrokinetic cell and maximum temperature and absorbs Caloric value；

Second computing module, for according to described electrokinetic cell, described insulation material, the initial temperature of described aluminium foil and the highest The caloric value that insulation material described in temperature computation absorbs；And

3rd computing module, based on the caloric value that the caloric value absorbed according to described electrokinetic cell and described insulation material absorb Calculate described electrokinetic cell heat power under described default multiplying power.

The device of electrokinetic cell heat power test the most according to claim 1, it is characterised in that described first calculates Module, specifically for:

By equation below calculate described electrokinetic cell absorb caloric value:

Q_cell=C_{p_cell}·m_cell·(T_{cell_1}-T_{cell_0}),

Wherein, Q_cellThe caloric value absorbed for described electrokinetic cell, T_{cell_0}、T_{cell_1}It is respectively the initial temperature of described electrokinetic cell Degree and maximum temperature, C_{p_cell}For the specific heat capacity of described electrokinetic cell, m_cellQuality for described electrokinetic cell.

The device of electrokinetic cell heat power test the most according to claim 1, it is characterised in that described second calculates Module, specifically for:

By equation below calculate described electrokinetic cell absorb caloric value:

$Q_{th}=C_{p\_th}\·m_{th}\·({\stackrel{\‾}{T}}_{th\_1}-{\stackrel{\‾}{T}}_{th\_0}),$

Wherein, Q_thThe caloric value absorbed for described electrokinetic cell,For the mean initial temperature of described insulation material, For the average maximum of described insulation material, C_{p_th}For the specific heat capacity of described insulation material, m_thFor described insulation material Quality.

The device of electrokinetic cell heat power test the most according to claim 3, it is characterised in that describedInstitute StateComputing formula be respectively as follows:

${\stackrel{\‾}{T}}_{th\_0}=\frac{T_{cell\_0}+T_{th\_0}+T_{Al\_0}}{3},$

${\stackrel{\‾}{T}}_{th\_1}=\frac{T_{cell\_1}+T_{th\_1}+T_{Al\_1}}{3},$

Wherein, T_{cell_0}、T_{th_0}And T_{Al_0}It is respectively described electrokinetic cell, described insulation material and the initial temperature of described aluminium foil, T_{cell_1}、T_{th_1}And T_{Al_1}It is respectively described electrokinetic cell, described insulation material and the maximum temperature of described aluminium foil.

The method of electrokinetic cell heat power test the most according to claim 1, it is characterised in that the described 3rd calculates Module, specifically for:

Described electrokinetic cell heat power under described default multiplying power is calculated by equation below:

$P=\frac{Q_{cell}+Q_{th}}{\mathrm{\τ}},$

Wherein, P is described electrokinetic cell heat power under described default multiplying power, and τ is temperature time when reaching the highest.

6. the method for an electrokinetic cell heat power test, it is characterised in that based on testing dress as claimed in claim 1 Put and carry out electrokinetic cell heat power test, said method comprising the steps of:

Described in being recorded respectively when described electrokinetic cell carries out discharge and recharge with default multiplying power with predetermined interval by described temperature sensor Electrokinetic cell, described insulation material and the temperature of affiliated aluminium foil, to obtain described electrokinetic cell, described insulation material and affiliated The initial temperature of aluminium foil and maximum temperature；

Initial temperature and maximum temperature according to described electrokinetic cell calculate the caloric value that described electrokinetic cell absorbs；

Described thermal insulating material is calculated according to described electrokinetic cell, described insulation material, the initial temperature of described aluminium foil and maximum temperature The caloric value that material absorbs；

The caloric value that the caloric value absorbed according to described electrokinetic cell and described insulation material absorb calculates described electrokinetic cell in institute State the heat power under default multiplying power.

The method of electrokinetic cell heat power test the most according to claim 6, it is characterised in that described in described basis The initial temperature of electrokinetic cell and maximum temperature calculate the caloric value that described electrokinetic cell absorbs, including:

By equation below calculate described electrokinetic cell absorb caloric value:

Q_cell=C_{p_cell}·m_cell·(T_{cell_1}-T_{cell_0}),

Wherein, Q_cellThe caloric value absorbed for described electrokinetic cell, T_{cell_0}、T_{cell_1}It is respectively the initial temperature of described electrokinetic cell Degree and maximum temperature, C_{p_cell}For the heat conductivity of described electrokinetic cell, m_cellQuality for described electrokinetic cell.

The method of electrokinetic cell heat power test the most according to claim 6, it is characterised in that described in described basis Electrokinetic cell, described insulation material, the initial temperature of described aluminium foil and maximum temperature calculate the heat that described insulation material absorbs Value, including:

By equation below calculate described electrokinetic cell absorb caloric value:

$Q_{th}=C_{p\_th}\·m_{th}\·({\stackrel{\‾}{T}}_{th\_1}-{\stackrel{\‾}{T}}_{th\_0}),$

Wherein, Q_thThe caloric value absorbed for described electrokinetic cell,For described electrokinetic cell, described insulation material and described The mean initial temperature of aluminium foil,For described electrokinetic cell, described insulation material and the average maximum of described aluminium foil, C_{p_th}For the heat conductivity of described insulation material, m_thQuality for described insulation material.

The method of electrokinetic cell heat power test the most according to claim 8, it is characterised in that describedInstitute StateComputing formula be respectively as follows:

${\stackrel{\‾}{T}}_{th\_0}=\frac{T_{cell\_0}+T_{th\_0}+T_{Al\_0}}{3},$

${\stackrel{\‾}{T}}_{th\_1}=\frac{T_{cell\_1}+T_{th\_1}+T_{Al\_1}}{3},$

Wherein, T_{cell_0}、T_{th_0}And T_{Al_0}It is respectively described electrokinetic cell, described insulation material and the initial temperature of described aluminium foil, T_{cell_1}、T_{th_1}And T_{Al_1}It is respectively described electrokinetic cell, described insulation material and the maximum temperature of described aluminium foil.

The method of electrokinetic cell heat power test the most according to claim 6, it is characterised in that described according to institute State electrokinetic cell described in the heat of electrokinetic cell absorption and the heat Calculation of described insulation material absorption under described default multiplying power Heat power, including:

Described electrokinetic cell heat power under described default multiplying power is calculated by equation below:

$P=\frac{Q_{all}}{\mathrm{\τ}}=\frac{Q_{cell}+Q_{th}}{\mathrm{\τ}},$

Wherein, P is described electrokinetic cell heat power under described default multiplying power, and τ is temperature time when reaching the highest.