CN107219326A - The performance estimating method and assessment system of a kind of secondary cell fire proofing - Google Patents
The performance estimating method and assessment system of a kind of secondary cell fire proofing Download PDFInfo
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Abstract
The invention provides a kind of performance estimating method of secondary cell fire proofing and assessment system, methods described includes：It is determined that the heat Q produced without the secondary cell of handicapping combustible material under the conditions of thermal runaway；It is determined that produce 1.1 2.0 times of heat Q when burning gases consumption；With the gas burning fire proofing of the consumption；Build the equation for assessing fire resistance；The system includes：Heat Calculation module, for the heat Q for determining to produce under the conditions of thermal runaway without the secondary cell of handicapping combustible material；Spray gun, is equiped with gaseous fuel inside it, and produced heat is Q during the gas fuel combustion；Memory, the consumption for recording gaseous fuel in spray gun；Evaluation module, for building fire resistance Estimate equation, so that the performance to fire proofing is estimated；The technical scheme that the present invention is provided, directs the preferred of secondary cell fire proofing, reduce further the danger coefficient that thermal runaway occurs for secondary cell.
Description
Technical field
The present invention relates to electrochemical power source and energy storage field, specially it is related to a kind of performance of secondary cell fire proofing
Appraisal procedure and assessment system.
Background technology
With the development of society, environmental problem increasingly causes the attention of the mankind, develop clean energy resource to replace conventional fossil
The energy becomes imperative, and secondary cell is widely used in waterpower, firepower, wind-force as a kind of new cleaning high capacity power source
With the accumulation power supply system such as solar power station and the multiple fields of electric tool, military equipment and Aero-Space, to environment
Improvement has very big impetus.
But in use, there is potential safety hazard in secondary cell, (such as mistake under some extreme cases or abuse condition
Charging, high temperature, acupuncture, short circuit, fall, hit) can occur thermal runaway, abrupt release goes out big energy, and with burning
Or the generation of explosion phenomenon, the thermal runaway of secondary cell can not only damage to the equipment of surrounding or personnel, but also can be right
Other neighbouring groups of secondary cells are impacted and damaged, and are caused other batteries also to be caused danger when serious and are produced thermal runaway company
Lock reactor.
In recent years, the continuous generation of secondary cell combustion explosion phenomenon, in order to reduce secondary cell in use
Danger coefficient, fire proofing is gradually applied in the security protection of secondary cell with its special anti-flaming thermal-insulation characteristic.
Existing fire proofing is placed directly within around secondary cell with sheet form mostly, on the one hand, due to lacking to two
The performance measurement of primary cell thermal runaway state and consequence, it is impossible to accurately obtain producing most near battery surface after battery thermal runaway
Big heat, it is impossible to the flame and high temperature for effectively preventing thermal runaway from producing；On the other hand, because the thickness and weight of fire proofing compared with
Greatly, the waste of material is not only caused, and causes fire proofing takes up space in battery pack larger；Therefore, prior art
The reliable selection to secondary cell fire proofing is difficult to, the thermal runaway danger coefficient of secondary cell is high.
The content of the invention
In order to overcome the deficiencies in the prior art, the present invention provides a kind of Performance Evaluation side of secondary cell fire proofing
Method；It is determined that on the basis of secondary cell thermal runaway generation heat, building effect, thickness and the quality for considering fire proofing
Etc. the fire resistance Estimate equation of parameter, the reliable selection to secondary cell fire proofing is realized, secondary cell is reduced
The danger coefficient of thermal runaway.
The present invention is achieved through the following technical solutions：
A kind of performance estimating method of secondary cell fire proofing, it comprises the following steps：
(1) under adiabatic environment, it is determined that the heat produced without the secondary cell of handicapping combustible material under the conditions of thermal runaway
Q；
(2) consumption of burning gases when determining to produce the 1.1-2.0 times of heat Q；
(3) with the gas burning fire proofing of the consumption；
(4) fire resistance Estimate equation is built.
It is preferred that, the step (1) includes：
1) the initial mass m0 and specific heat capacity Cp0 of the secondary cell without handicapping combustible material are determined；
2) to the over-charging of battery provided with temperature sensor, record overcharges front and rear battery surface initial temperature T respectively0With
Maximum temperature Tm；
3) according to Q=Cp0m0(Tm-T0) determine heat Q.
It is preferred that, the number of the temperature sensor is 2-10, and the 2-10 of secondary cell one side is correspondingly arranged in respectively
It is individual, one of point positioned at the center of the battery one side, remaining each point be by the center of circle of the center, radius is more than should
On the circumference that the distance of secondary cell both sides is formed.
It is preferred that, the temperature sensor is connected by temperature collecting device with data handling system；
The temperature collecting device includes Signal-regulated kinase, multi-path choice A/D acquisition modules, main control module and communication mould
Block, is sequentially connected in series between the Signal-regulated kinase, multi-path choice A/D acquisition modules, main control module and communication module.
It is preferred that, specifically included in the step (3)：With install the consumption gaseous fuel spray gun to fire proofing
Jet flames, the temperature of record fire proofing both sides.
It is preferred that, the pressure and flow velocity of the jet flames are respectively 0.1-3MPa and 1-300ml/min.
It is preferred that, assess fire resistance by following equation Y:
Y=jA+kB+lC
In formula：A- flame retardant effect parameters, the fire-retardant thickness parameters of B-, C- fire blocking qualities parameters；J, k, l are respectively fire-retardant effect
Really, thickness and the weight coefficient of mass parameter, j+k+l=1.
It is preferred that, duration T when not producing flame according to fire proofing when the temperature difference △ T of both sides and generation flame
Determine flame retardant effect parameter A.
It is preferred that, fire-retardant thickness parameter B is determined as the following formula：
In formula：The α relevant with the thickness of battery-thickness adjustment index, unit/mm；
D- fire proofing thickness, unit/mm.
It is preferred that, fire blocking qualities parameter C is determined as the following formula：
In formula：The beta electric cell quality radix relevant with the quality of battery, unit/g；
γ-Mass adjust- ment index, unit/g；
mz- fire proofing quality, unit/g.
A kind of performance evaluation system of fire proofing for secondary cell, including：
Heat Calculation module, under adiabatic environment, it is determined that without handicapping combustible material secondary cell in thermal runaway bar
The heat Q produced under part；
Spray gun, is equiped with gaseous fuel inside it, and produced heat is Q during the gas fuel combustion；
Memory, the consumption for recording gaseous fuel in spray gun；
Evaluation module, for building fire resistance Estimate equation, so that the performance to fire proofing is estimated.
It is preferred that, heat Calculation module, for determining heat Q by following formula：
Q=Cp0m0(Tm-T0)
In formula, m0、Cp0Respectively without handicapping combustible material secondary cell initial mass and specific heat capacity；T0, Tm difference
To the battery provided with temperature sensor overcharge initial temperature, the maximum temperature of forward and backward battery surface.
It is preferred that, the number of the temperature sensor is 2-10, and the 2-10 of secondary cell one side is correspondingly arranged in respectively
Individual, one of point is positioned at the center of the battery one side, and remaining each point is located at by the center of circle of the center, diameter is more than
On the circumference that the distance of the secondary cell both sides is formed.
It is preferred that, the temperature sensor is connected by temperature collecting device with data handling system；
The temperature collecting device includes Signal-regulated kinase, multi-path choice A/D acquisition modules, main control module and communication mould
Block, is sequentially connected in series between the Signal-regulated kinase, multi-path choice A/D acquisition modules, main control module and communication module.
It is preferred that, memory, when fire proofing does not produce flame when being additionally operable to record spray gun to fire proofing jet flames
Flame duration T when the temperature of both sides, the temperature difference △ T of both sides and generation flame.
It is preferred that, evaluation module determines fire resistance evaluation score Y for the fire resistance Estimate equation by following formula:
Y=jA+kB+lC
In formula：A- flame retardant effect parameters, the fire-retardant thickness parameters of B-, C- fire blocking qualities parameters, the higher expression anti-flammabilitys of Y
Can be better；J, k, l are respectively the weight coefficient of flame retardant effect, thickness and mass parameter, j+k+l=1.
It is preferred that, evaluation module includes：
Flame retardant effect computing module, the temperature difference △ T of both sides and generation fire during for not producing flame according to fire proofing
Flame duration T during flame determines flame retardant effect parameter A；
Fire-retardant THICKNESS CALCULATION module, for determining fire-retardant thickness parameter B by following formula：
In formula：α-relevant with the thickness of battery thickness adjustment index, unit/mm；D- fire proofing thickness, unit/mm；
Fire blocking qualities computing module, for determining fire blocking qualities parameter C by following formula：
In formula：β-relevant with the quality of battery battery quality radix, unit/g；γ-Mass adjust- ment index, unit/g；
mz- fire proofing quality, unit/g.
With immediate prior art ratio, the present invention has the advantages that：
1st, the technical scheme that provides of the present invention, according under adiabatic environment without handicapping combustible material secondary cell in thermal runaway
Under the conditions of the heat Q that produces and relation when producing the heat Q between the gas usage of burning gases, and with structure fire resistance
The method of equation, realizes the accurate evaluation of the fire resistance of fire proofing for secondary cell, so as to greatly reduce two
The danger coefficient of primary cell thermal runaway.
2nd, the technical scheme that the present invention is provided, has considered effect, thickness and the quality of secondary cell fire proofing,
On the premise of the fire resistance of secondary cell is improved, the volume fraction and matter of fire proofing in the secondary battery are substantially reduced
Number is measured, is the increase room for promotion of internal battery pack volume and energy density, realizes the optimization of inside battery fire proofing
Selection.
3rd, the technical scheme that the present invention is provided, method is simple and easily operated.
Brief description of the drawings
Fig. 1 is a kind of FB(flow block) of the performance estimating method of secondary cell fire proofing of the invention；
Fig. 2 is the rigid package secondary cell surface temperature sensor layout drawing of present example 1；
Fig. 3 is the secondary battery of soft package surface temperature sensor layout drawing of present example 2.
Embodiment
The present invention is described in further details below by specific embodiment：
By a of length, width be b, thickness be c, a>b>The fire proofing provided exemplified by c secondary cell the present invention
Performance estimating method is made to illustrate as follows：
1st, the heat produced under battery thermal runaway is determined：
(1) with the battery charging and discharging instrument of 1C-3C current ratios by without the charged shapes of the SOC of the secondary cell of handicapping combustible material
State is adjusted to 50-100%, and is weighed, and is designated as m0；
(2) under " mCp " pattern, the specific heat capacity of the secondary cell without handicapping combustible material is determined with adiabatic accelerating calorimeter
Cp, is designated as Cp0；
(3) temperature sensor is set in the secondary cell surface without handicapping combustible material, with 2-5C electricity under adiabatic environment
Stream multiplying power is overcharged, and records secondary cell hot face temperature Tm and battery surface initial temperature T0, and by formula Q=Cp0m0(Tm-
T0) calculate the heat Q that battery is produced；
The number of the temperature sensor is 2-10, and 2-10 point of secondary cell one side is correspondingly arranged in respectively, its
In a point be located at the center of the battery one side, remaining each point is located at by the center of circle of the center, diameter is more than that this is secondary
On the circumference that the distance of battery both sides is formed；
The temperature sensor is connected by temperature collecting device with data handling system；The temperature collecting device includes
Signal-regulated kinase, multi-path choice A/D acquisition modules, main control module and communication module, the Signal-regulated kinase, multi-path choice
It is sequentially connected in series between A/D acquisition modules, main control module and communication module；
2nd, burn gas fuel, required gaseous fuel consumption when record produces the heat；
3rd, with the gas fuel combustion fire proofing of the consumption：
Temperature sensor is set for the both sides center of 8-12cm square fire proofing in the length of side, with filling institute
State consumption gaseous fuel spray gun to fire proofing side with flame envelope mode of heating jet flames, in pressure 0.3-0.60MPa,
The fire proofing is sprayed under flow velocity 125ml/min-165ml/min, the combustion case and fire proofing two of fire proofing is recorded
The temperature of side temperature sensor
4th, appraisal procedure：
(1) fire-retardant parameter is determined
1) the temperature difference △ T of both sides and duration T when producing flame are determined when not producing flame according to fire proofing
Flame retardant effect parameter A, table specific as follows：
2) fire-retardant thickness parameter B is determined as the following formula：
In formula：The fire-retardant thickness parameter of B-battery；
α-relevant with the thickness of battery thickness adjustment index, chooses numerical value 10, unit/mm；
D-fire proofing thickness, unit/mm.
3) fire blocking qualities parameter C is determined as the following formula：
In formula：C-battery fire blocking qualities parameter；
β-relevant with the quality of battery battery quality radix, chooses numerical value 120, unit/g；
γ-Mass adjust- ment index, chooses numerical value 10, unit/g；
mz- fire proofing quality, unit/g.
(2) according to the fire-retardant parameter of the fire proofing of determination, fire resistance is assessed by following equations:
Y=jA+kB+lC
In formula：A- flame retardant effect parameters, the fire-retardant thickness parameters of B-, C- fire blocking qualities parameters, Y- fire proofing evaluation scores,
Fraction is higher, and the fire resistance rank of fire proofing is higher, and fire resistance is more excellent；J, k, l are respectively flame retardant effect, thickness and matter
Measure the weight coefficient of parameter, j+k+l=1.
A kind of performance evaluation system of fire proofing for secondary cell, including：
Heat Calculation module, under adiabatic environment, it is determined that without handicapping combustible material secondary cell in thermal runaway bar
The heat Q produced under part；
Spray gun, is equiped with gaseous fuel inside it, and produced heat is Q during the gas fuel combustion；
Memory, the consumption for recording gaseous fuel in spray gun；
Evaluation module, for building fire resistance Estimate equation, so that the performance to fire proofing is estimated.
The heat Calculation module, for determining heat Q by following formula：
Q=Cp0m0(Tm-T0)
In formula, m0、Cp0Respectively without handicapping combustible material secondary cell initial mass and specific heat capacity；T0, Tm difference
To the battery provided with temperature sensor overcharge initial temperature, the maximum temperature of forward and backward battery surface.
The number of the temperature sensor is 2-10, and 2-10 point of secondary cell one side is correspondingly arranged in respectively, its
In a point be located at the center of the battery one side, remaining each point is located at by the center of circle of the center, diameter is more than that this is secondary
On the circumference that the distance of battery both sides is formed.
The temperature sensor is connected by temperature collecting device with data handling system；
The temperature collecting device includes Signal-regulated kinase, multi-path choice A/D acquisition modules, main control module and communication mould
Block, is sequentially connected in series between the Signal-regulated kinase, multi-path choice A/D acquisition modules, main control module and communication module.
The memory, both sides when fire proofing does not produce flame when being additionally operable to record spray gun to fire proofing jet flames
Temperature, the temperature difference △ T of both sides and produce flame when flame duration T.
The evaluation module, fire resistance evaluation score Y is determined for the fire resistance Estimate equation by following formula:
Y=jA+kB+lC
In formula：A- flame retardant effect parameters, the fire-retardant thickness parameters of B-, C- fire blocking qualities parameters, the higher expression anti-flammabilitys of Y
Can be better；J, k, l are respectively the weight coefficient of flame retardant effect, thickness and mass parameter, j+k+l=1.
The evaluation module includes：
Flame retardant effect computing module, the temperature difference △ T of both sides and generation fire during for not producing flame according to fire proofing
Flame duration T during flame determines flame retardant effect parameter A；
Fire-retardant THICKNESS CALCULATION module, for determining fire-retardant thickness parameter B by following formula：
In formula：α-relevant with the thickness of battery thickness adjustment index, unit/mm；D- fire proofing thickness, unit/mm；
Fire blocking qualities computing module, for determining fire blocking qualities parameter C by following formula：
In formula：β-relevant with the quality of battery battery quality radix, unit/g；γ-Mass adjust- ment index, unit/g；
mz- fire proofing quality, unit/g.
Below with the wide * height=a*b*d=80*55*26mm of long *, battery marked capacity 10Ah's does not load fire proofing
Exemplified by secondary cell and 3 kinds of fire proofings 1,2 and 3, the fire resistance appraisal procedure to the present invention is described in further detail, gas
Fluid fuel selects methane；
Fire resistance appraisal procedure comprises the following steps：
Example one
(1), will be charged without the SOC of the secondary cell of handicapping combustible material with battery charging and discharging instrument under 1C current ratio
State is adjusted to 100%, and weighs m0=234g；
(2) under " mCp " pattern, the specific heat capacity of the secondary cell without handicapping combustible material is determined with adiabatic accelerating calorimeter
Cp0=1.0121J (gk)-1；
(3) 5 temperature sensors are set in the secondary cell surface without handicapping combustible material, be correspondingly arranged in respectively secondary
5 points above battery:P1-P5；P1 is the center of battery one side (ab faces), and P2, P3, P4 and P5 are located at using P1 as circle respectively
The heart, using R=35mm as the circumference of radius on, P2：(-20,22),P3：(20,22),P4：(- 20, -22), P5：(20,-22)；
P1-P5 points correspondence measurement temperature is designated as T1-T5, Tm=max (T1, T2, T3, T4, T5) respectively；
The secondary cell is overcharged with 2C current ratios under adiabatic environment, temperature sensor by temperature collecting device with
Data handling system is connected, and temperature data is transferred to computer or mobile phone, the temperature data result of collection by data collecting system
Display：T1=301.5 DEG C, T2=193.3 DEG C, T3=221.8 DEG C, T4=254.5 DEG C and T5=418.5 DEG C, therefore Tm=418.5
℃；Wherein, battery initial temperature T identical with room temperature0=25 DEG C；By formula Q=Cp0m0(Tm-T0) calculate obtain battery thermal runaway
Produce heat Q=93.1932kJ.
(4) combustion of methane gaseous fuel, the amount of the material of required methane gas is when record produces the heat
0.126mol；
(5) temperature sensor is set for the both sides center of 100mm*100mm fire proofings 1,2 and 3 in size, in pressure
Under power 0.1MPa, flow velocity 1ml/min, with the spray gun equipped with 0.126mol methane gas to the side of fire proofing 1,2 and 3 beyond
Flame mode of heating jet flames, when gas discharges heat Q1=1.1Q=102.5125kJ, fire proofing 1 and 2 does not produce fire
Flame, it is respectively 38 DEG C and 9 DEG C to draw temperature sensor both sides temperature difference, and fire proofing 3 produces flame, measures flame with stopwatch and exist
Extinguish in 30s, and have comburant drippage；
Wherein, size is designated as d for the thickness of 100mm*100mm fire proofings 1,2 and 3, and quality is designated as mz；Concrete numerical value is such as
Following table:
| Fire proofing is numbered | Thickness d (mm) | Quality mz(g) |
| 1 | 12.5 | 90.0 |
| 2 | 10.0 | 42.0 |
| 3 | 7.7 | 27.8 |
Table 1
(6) fire proofing 1-3 flame retardant effect parameter A1-A3 is determined according to following table；Draw
A1=9；A2=6；A3=4；
Table 2
(7) formula is pressedDetermine fire-retardant the thickness parameter B1=0.8, B2=1, B3=1.30 of fire proofing；
(8) formula is pressedDetermine fire proofing mass parameter C1=3, C2=7.8, C3=9.22；
(9) according to the fire-retardant parameter of the fire proofing of determination, fire resistance is assessed by following equations:
Y=0.6A+0.2B+0.2C
Draw：Y1=6.16, Y2=5.36, Y3=4.50.
Conclusion：The evaluation score highest of fire proofing 1, its fire resistance rank highest, fire resistance is optimal, by fire-retardant material
Material 1 is most suitable as the fire proofing of secondary cell, and the danger coefficient of such secondary cell thermal runaway is minimum.
3 kinds of fire proofing fire resistance parameter comparison such as following tables：
Table 3
Example two
(1), will be charged without the SOC of the secondary cell of handicapping combustible material with battery charging and discharging instrument under 1C current ratio
State is adjusted to 100%, and weighs m0=457g；
(2) under " mCp " pattern, the specific heat capacity of the secondary cell without handicapping combustible material is determined with adiabatic accelerating calorimeter
Cp0=1.3827J (gK)-1；
(3) 5 temperature sensors are set in the secondary cell surface without handicapping combustible material, be correspondingly arranged in respectively secondary
5 points above battery:P1-P5；P1 is the center of battery one side (ab faces), and P2, P3, P4 and P5 are located at using P1 as circle respectively
The heart, using R=40mm as the circumference of radius on, P2：(-33,50),P3：(33,50),P4：(- 33,50), P5：(33,-50)；P1-
P5 points correspondence measurement temperature is designated as T1-T5, Tm=max (T1, T2, T3, T4, T5) respectively；
The secondary cell is overcharged with 2C current ratios under adiabatic environment, temperature sensor by temperature collecting device with
Data handling system is connected, and temperature data is transferred to computer or mobile phone, the temperature data result of collection by data collecting system
Display：T1=297.6 DEG C, T2=201.3 DEG C, T3=195.7.8 DEG C, T4=239.5 DEG C and T5=302.5 DEG C, therefore Tm=
302.5℃；Wherein, battery initial temperature is identical with room temperature T0=25 DEG C；Calculated by formula Q=Cp0m0 (Tm-T0) and obtain battery
Thermal runaway produces heat Q=175.35kJ.
(4) combustion of methane gaseous fuel, the amount of the material of required methane gas is when record produces the heat
0.197mol；
(5) temperature sensor is set for the both sides center of 100mm*100mm fire proofings 1,2 and 3 in size, in pressure
Under power 3MPa, flow velocity 300ml/min, with the spray gun equipped with 0.197mol methane gas to the side of fire proofing 1,2 and 3 beyond
Flame mode of heating jet flames, when gas discharges heat Q1=2.0Q=350.7kJ, fire proofing 1 and 2 does not produce flame,
It is respectively 28 DEG C and 6 DEG C to draw temperature sensor both sides temperature difference, and fire proofing 3 produces flame, flame is measured with stopwatch in 30s
It is interior to extinguish, and have comburant drippage；
Wherein, size is designated as d for the thickness of 100mm*100mm fire proofings 1,2 and 3, and quality is designated as mz；Concrete numerical value is such as
Following table:
| Fire proofing is numbered | Thickness d (mm) | Quality mz(g) |
| 1 | 12.5 | 90.0 |
| 2 | 10.0 | 42.0 |
| 3 | 7.7 | 27.8 |
Table 4
(6) fire proofing 1-3 flame retardant effect parameter A1-A3 is determined according to following table；Draw
A1=8；A2=6；A3=4；
Table 5
(7) formula is pressedDetermine fire-retardant the thickness parameter B1=0.8, B2=1, B3=1.30 of fire proofing；
(8) formula is pressedDetermine fire proofing mass parameter C1=3, C2=7.8, C3=9.22；
(9) according to the fire-retardant parameter of the fire proofing of determination, fire resistance is assessed by following equations:
Y=0.6A+0.2B+0.2C
Draw：Y1=5.56, Y2=5.36, Y3=4.50.
Conclusion：The evaluation score highest of fire proofing 1, its fire resistance rank highest, fire resistance is optimal, by fire-retardant material
Material 1 is most suitable as the fire proofing of secondary cell, and the danger coefficient of such secondary cell thermal runaway is minimum.
3 kinds of fire proofing fire resistance parameter comparison such as following tables：
Table 6
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although with reference to above-described embodiment pair
The present invention is described in detail, and those of ordinary skill in the art can still enter to the embodiment of the present invention
Row modification or equivalent substitution, these any modifications or equivalent substitution without departing from spirit and scope of the invention, in application
Within pending claims of the invention.
Claims (17)
1. a kind of performance estimating method of secondary cell fire proofing, it is characterised in that this method comprises the following steps：
(1) under adiabatic environment, it is determined that the heat Q produced without the secondary cell of handicapping combustible material under the conditions of thermal runaway；
(2) consumption of burning gases when determining to produce the 1.1-2.0 times of heat Q；
(3) with the gas burning fire proofing of the consumption；
(4) fire resistance Estimate equation is built.
2. a kind of performance estimating method of secondary cell fire proofing as claimed in claim 1, it is characterised in that the step
Suddenly (1) includes：
1) the initial mass m of the secondary cell without handicapping combustible material is determined0With specific heat capacity Cp0；
2) to the over-charging of battery provided with temperature sensor, record overcharges front and rear battery surface initial temperature T respectively0And highest
Temperature Tm；
3) according to Q=Cp0m0(Tm-T0) determine heat Q.
3. a kind of performance estimating method of secondary cell fire proofing as claimed in claim 2, it is characterised in that the temperature
It is 2-10 to spend the number of sensor, and 2-10 point of secondary cell one side is correspondingly arranged in respectively, and one of point is located at
The center of the battery one side, remaining each point be located at by the center of circle of the center, diameter be more than the secondary cell both sides distance
On the circumference formed.
4. a kind of performance estimating method of secondary cell fire proofing as claimed in claim 3, it is characterised in that the temperature
Degree sensor is connected by temperature collecting device with data handling system；
The temperature collecting device includes Signal-regulated kinase, multi-path choice A/D acquisition modules, main control module and communication module,
It is sequentially connected in series between the Signal-regulated kinase, multi-path choice A/D acquisition modules, main control module and communication module.
5. a kind of performance estimating method of secondary cell fire proofing as claimed in claim 1, it is characterised in that the step
Suddenly (3) are specifically included：
With install the consumption gaseous fuel spray gun to fire proofing jet flames, the temperature of record fire proofing both sides.
6. a kind of performance estimating method of secondary cell fire proofing as claimed in claim 5, it is characterised in that the spray
The pressure and flow velocity for penetrating flame are respectively 0.1-3MPa and 1-300ml/min.
7. a kind of performance estimating method of secondary cell fire proofing as claimed in claim 1, it is characterised in that by following
Equation Y assesses fire resistance:
Y=jA+kB+lC
In formula：A- flame retardant effect parameters, the fire-retardant thickness parameters of B-, C- fire blocking qualities parameters；J, k, l are respectively flame retardant effect, thickness
The weight coefficient of degree and mass parameter, j+k+l=1.
8. a kind of performance estimating method of secondary cell fire proofing as claimed in claim 7, it is characterised in that according to resistance
The temperature difference △ T of both sides and duration T when producing flame determine flame retardant effect parameter A when combustible material does not produce flame.
9. a kind of performance estimating method of secondary cell fire proofing as claimed in claim 7, it is characterised in that as the following formula
Determine fire-retardant thickness parameter B：
<mrow>
<mi>B</mi>
<mo>=</mo>
<mfrac>
<mi>&alpha;</mi>
<mi>d</mi>
</mfrac>
</mrow>
In formula：α-relevant with the thickness of battery thickness adjustment index, unit/mm；
D- fire proofing thickness, unit/mm.
10. a kind of performance estimating method of secondary cell fire proofing as claimed in claim 7, it is characterised in that press
Formula determines fire blocking qualities parameter C：
<mrow>
<mi>C</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mi>&beta;</mi>
<mo>-</mo>
<msub>
<mi>m</mi>
<mi>z</mi>
</msub>
</mrow>
<mi>&gamma;</mi>
</mfrac>
</mrow>
In formula：β-relevant with the quality of battery battery quality radix, unit/g；
γ-Mass adjust- ment index, unit/g；
mz- fire proofing quality, unit/g.
11. a kind of performance evaluation system of fire proofing for secondary cell, it is characterised in that including：
Heat Calculation module, under adiabatic environment, it is determined that without handicapping combustible material secondary cell under the conditions of thermal runaway
The heat Q of generation；
Spray gun, is equiped with gaseous fuel inside it, and produced heat is Q during the gas fuel combustion；
Memory, the consumption for recording gaseous fuel in spray gun；
Evaluation module, for building fire resistance Estimate equation, so that the performance to fire proofing is estimated.
12. a kind of performance evaluation system of fire proofing for secondary cell as claimed in claim 11, it is characterised in that
Heat Calculation module, for determining heat Q by following formula：
Q=Cp0m0 (Tm-T0)
In formula, m0, Cp0 are respectively the initial mass and specific heat capacity of the secondary cell without handicapping combustible material；T0, Tm are respectively pair
Battery provided with temperature sensor overcharge initial temperature, the maximum temperature of forward and backward battery surface.
13. a kind of performance evaluation system of fire proofing for secondary cell as claimed in claim 12, it is characterised in that
The number of the temperature sensor is 2-10, and 2-10 point of secondary cell one side is correspondingly arranged in respectively, one of those
Point is positioned at the center of the battery one side, and remaining each point is located at by the center of circle of the center, diameter is more than the secondary cell both sides
The circumference that is formed of distance on.
14. a kind of performance evaluation system of fire proofing for secondary cell as claimed in claim 13, it is characterised in that
The temperature sensor is connected by temperature collecting device with data handling system；
The temperature collecting device includes Signal-regulated kinase, multi-path choice A/D acquisition modules, main control module and communication module,
It is sequentially connected in series between the Signal-regulated kinase, multi-path choice A/D acquisition modules, main control module and communication module.
15. a kind of performance evaluation system of fire proofing for secondary cell as claimed in claim 11, it is characterised in that
Memory, the temperature of both sides, both sides when fire proofing does not produce flame when being additionally operable to record spray gun to fire proofing jet flames
Temperature difference △ T and produce flame when flame duration T.
16. a kind of performance evaluation system of fire proofing for secondary cell as claimed in claim 11, it is characterised in that
Evaluation module, fire resistance evaluation score Y is determined for the fire resistance Estimate equation by following formula:
Y=jA+kB+lC
In formula：A- flame retardant effect parameters, the fire-retardant thickness parameters of B-, C- fire blocking qualities parameters, the Y is higher to represent fire resistance more
It is good；J, k, l are respectively the weight coefficient of flame retardant effect, thickness and mass parameter, j+k+l=1.
17. a kind of performance evaluation system of fire proofing for secondary cell as claimed in claim 16, it is characterised in that
Evaluation module includes：
Flame retardant effect computing module, when the temperature difference △ T of both sides are with flame is produced during for not producing flame according to fire proofing
Flame duration T determine flame retardant effect parameter A；
Fire-retardant THICKNESS CALCULATION module, for determining fire-retardant thickness parameter B by following formula：
<mrow>
<mi>B</mi>
<mo>=</mo>
<mfrac>
<mi>&alpha;</mi>
<mi>d</mi>
</mfrac>
</mrow>
2
In formula：α-relevant with the thickness of battery thickness adjustment index, unit/mm；D- fire proofing thickness, unit/mm；
Fire blocking qualities computing module, for determining fire blocking qualities parameter C by following formula：
<mrow>
<mi>C</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mi>&beta;</mi>
<mo>-</mo>
<msub>
<mi>m</mi>
<mi>z</mi>
</msub>
</mrow>
<mi>&gamma;</mi>
</mfrac>
</mrow>
In formula：β-relevant with the quality of battery battery quality radix, unit/g；γ-Mass adjust- ment index, unit/g；Mz- hinders
Combustible material quality, unit/g.
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