CN109063410A - A kind of Energy Analysis for High during lithium ion battery thermal runaway - Google Patents
A kind of Energy Analysis for High during lithium ion battery thermal runaway Download PDFInfo
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Abstract
The present invention provides the Energy Analysis for High during a kind of lithium ion battery thermal runaway, and this method comprises the following steps: a selected lithium ion battery carries out thermal runaway experiment to it, collects residue and measures combustion heat value；Another lithium ion battery is selected, it is disassembled, separation anode, cathode, electrolyte, diaphragm, aluminum plastic film simultaneously measure combustion heat value, and pass through the combustion heat value under combustion heat value, cathode and the coexistent electrolyte solution under calorimeter measurement anode and coexistent electrolyte solution；Calculate the energy discharged during lithium ion battery thermal runaway.The present invention is using combustion heat value before and after indirect mode measurement lithium ion battery thermal runaway, it is released energy in the process using weighting scheme analysis lithium ion battery thermal runaway, the safeguard procedures outside lithium ion battery are carried out accordingly, and then it endangers and is preferably minimized caused by cells burst explodes, delay the trend of fire spread, races against time for personnel escape and fire-fighting emergent.
Description
Technical field
The present invention relates to technical field of lithium ion, during a kind of lithium ion battery thermal runaway
Energy Analysis for High.
Background technique
With flourishing for lithium ion battery energy storage market, the safety of lithium ion battery itself is increasingly closed
Note.In addition a lot of safety accidents have occurred in power battery of electric motor car in recent years, have caused people for lithium ion secondary battery
The safety worries of energy storage.
, mainly there are two aspects in the reason of lithium ion battery generation safety accident, and one side lithium ion battery is using low ignition point
Organic carbonate esters electrolyte system, when battery is in overcharging state, organic solvent is easy to generate in positive electrode surface irreversible
Oxygenolysis leads to internal temperature of battery and pressure along with the generation of a large amount of imflammable gas while releasing amount of heat
Power steeply rises, to bring the danger of explosion, burning to battery；On the other hand, there are a systems for inside lithium ion cell itself
Potential exothermic reaction is arranged, battery is especially the abuse of battery, such as battery overcharge, overdischarge, outside in use
It may result in inside battery chemical substance with internal short-circuit, extruding, collision and high temperature etc. to react, generate inside battery
A large amount of heat causes battery that thermal runaway occurs, and eventually leads to the kindling or explosion of battery.Therefore lithium ion battery must be carried out
Security protection.Especially in certain extreme cases, when the thermal runaway of battery not can avoid by internal Protection measure, battery will
Combustion explosion inevitably occurs.
Summary of the invention
In consideration of it, the invention proposes the Energy Analysis for High during a kind of lithium ion battery thermal runaway, it is intended to solve
The problem of existing lithium ion battery thermal runaway causes batteries caught fire or explosion to lead to fire.
The invention proposes the Energy Analysis for High during a kind of lithium ion battery thermal runaway, this method includes following step
Rapid: thermal runaway measuring process, a selected lithium ion battery carries out thermal runaway experiment to it, after collecting lithium ion battery thermal runaway
Residue and the combustion heat value that residue is measured by calorimeter；Measuring process is disassembled, is selected selected with the thermal runaway measuring process
Lithium ion battery with another lithium ion battery of state, it is disassembled, separate anode, cathode, electrolyte, diaphragm, aluminium
Plastic film and the combustion heat value that anode, cathode, electrolyte, diaphragm, aluminum plastic film are measured by calorimeter, and just by calorimeter measurement
Combustion heat value, cathode under pole and coexistent electrolyte solution and the combustion heat value under coexistent electrolyte solution；The anode and coexistent electrolyte solution
Under electrolyte be the lithium ion battery dismantling electrolyte half；Electrolyte under the cathode and coexistent electrolyte solution is
The half of the electrolyte of the lithium ion battery dismantling；Step is calculated, is surveyed according to the thermal runaway measuring process and the dismantling
The combustion heat value for measuring step measurement calculates the energy discharged during the lithium ion battery thermal runaway using weighting scheme.
Further, the Energy Analysis for High during above-mentioned lithium ion battery thermal runaway, the calculating step include such as
Lower sub-step: cells burst heat calculates sub-step, according to the combustion heat value of the dismantling measuring process measurement, using weighting scheme
Calculate the combustion heat value of lithium ion battery；Capacity calculation sub-step calculates the lithium that sub-step calculates according to the cells burst heat
The combustion heat value of the combustion heat value of ion battery and thermal runaway measuring process measurement lithium ion, calculates the lithium ion battery
The energy discharged during thermal runaway.
Further, the Energy Analysis for High during above-mentioned lithium ion battery thermal runaway is fired in the battery
It heats and calculates in sub-step, the calculation formula of the combustion heat value Q of the lithium ion battery is as follows:
Q=mQ(c,e)+nQ(a,e)+oQ(e)+(1-m)Q(c)+(1-n)Q(a)+Q(g)+Q(l)+Q(s)
In formula, m, n, o (0≤m, n, o≤1) are correction factor, Q(c,e)For the burning under the anode and coexistent electrolyte solution
Calorific value, Q(a,e)For the combustion heat value under the cathode and coexistent electrolyte solution, Q(e)For the electrolyte of lithium ion battery dismantling
Combustion heat value, Q(c)For the combustion heat value of the anode of lithium ion battery dismantling, Q(a)For the negative of lithium ion battery dismantling
The combustion heat value of pole, Q(g)For the combustion heat value of the diaphragm of lithium ion battery dismantling, Q(l)For lithium ion battery dismantling
Aluminum plastic film combustion heat value, Q(s)For can not backheating.
Further, the Energy Analysis for High during above-mentioned lithium ion battery thermal runaway, in capacity calculation sub-step,
The energy Q discharged during the lithium ion battery thermal runaway(r)Calculation formula it is as follows:
Q(r)=Q-Q(z)
In formula, Q is the combustion heat value of lithium ion battery, Q(z)For the burning of the residue after the lithium ion battery thermal runaway
Calorific value.
Further, the Energy Analysis for High during above-mentioned lithium ion battery thermal runaway is measured in the thermal runaway and is walked
In the rapid or described dismantling measuring process, the combustion heat value of each section is measured by the following manner: substance being divided into several pieces, is led to
The combustion heat value for crossing measurement a copy of it, calculates the combustion heat value of the substance.
Further, the Energy Analysis for High during above-mentioned lithium ion battery thermal runaway is measured in the thermal runaway and is walked
In the rapid or described dismantling measuring process, the calorimeter is oxygen bomb calorimeter.
Further, the Energy Analysis for High during above-mentioned lithium ion battery thermal runaway is measured in the thermal runaway and is walked
In rapid, using overcharge, short circuit, heat abuse or needle thorn mode induce the lithium ion battery and thermal runaway occur.
Further, the Energy Analysis for High during above-mentioned lithium ion battery thermal runaway, in the dismantling measuring process
In, the lithium ion battery of dismantling is full electric state state, and tear down operations are carried out in glove box.
Further, the Energy Analysis for High during above-mentioned lithium ion battery thermal runaway, in the dismantling measuring process
In, after lithium ion battery dismantling, using dimethyl carbonate to isolated anode, cathode, diaphragm, electrolyte, plastic-aluminum
Film is cleaned.
Energy Analysis for High during lithium ion battery thermal runaway provided by the invention, using indirect mode measurement lithium from
Combustion heat value before and after sub- battery thermal runaway, and released energy in the process using weighting scheme analysis lithium ion battery thermal runaway, with
Just the safeguard procedures outside lithium ion battery are carried out accordingly, and then are endangered and be preferably minimized caused by cells burst is exploded, and to the greatest extent
The possible trend for delaying fire spread is raced against time for personnel escape and fire-fighting emergent.
Especially, it is calculated using using weighting scheme, improves the energy discharged during lithium ion battery thermal runaway
Measure Q(r)The accuracy of calculating, and then the cognition to the energy discharged during lithium ion battery thermal runaway is further increased, thus
The accuracy of the safeguard procedures outside lithium ion battery is improved, and then further delays the trend of fire spread, is personnel escape
And fire-fighting emergent strives for more times.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the process signal of the Energy Analysis for High during lithium ion battery thermal runaway provided in an embodiment of the present invention
Figure；
Fig. 2 is the flow diagram provided in an embodiment of the present invention for calculating step.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.It should be noted that in the absence of conflict, embodiment in the present invention and
Feature in embodiment can be combined with each other.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
It is the Energy Analysis for High during lithium ion battery thermal runaway provided in an embodiment of the present invention referring to Fig. 1
Flow diagram.As shown, this method comprises the following steps:
Thermal runaway measuring process S1, a selected lithium ion battery carry out thermal runaway experiment to it, collect lithium ion battery heat
Residue after out of control simultaneously passes through the combustion heat value that calorimeter measures residue.
Specifically, a firstly, selected lithium ion battery.Then, by carrying out thermal runaway experiment to the lithium ion battery,
Residue after collecting lithium ion battery thermal runaway；Preferably, using overcharge, short circuit, heat abuse or needle thorn mode induce full battery
Thermal runaway occurs for the lithium ion battery of state, so that the energy release in lithium ion battery is abundant；It is further preferred that using heat
Abuse route induces thermal runaway experiment.Finally, measuring the burning for the residue collected after lithium ion battery thermal runaway by calorimeter
Calorific value Q(z).Preferably, calorimeter is oxygen bomb calorimeter.
Measuring process S2 is disassembled, selectes the lithium ion battery selected with the thermal runaway measuring process with another lithium of state
Ion battery disassembles it, and separation anode, cathode, electrolyte, diaphragm, aluminum plastic film are simultaneously measured positive, negative by calorimeter
Pole, electrolyte, diaphragm, aluminum plastic film combustion heat value, and by calorimeter measurement anode and coexistent electrolyte solution under combustion heat value,
Combustion heat value under cathode and coexistent electrolyte solution.
Specifically, firstly, the lithium ion of the selected one lithium ion battery same state selected with thermal runaway measuring process
Battery；Preferably, the lithium ion battery selected is full electric state state.Then, by the lithium ion battery to full battery status into
Row dismantling, with isolated anode, cathode, diaphragm, electrolyte, aluminum plastic film；Preferably, lithium ion battery can be in glove box
Tear down operations are carried out, to prevent the chemical environment of lithium ion battery from changing to influence test result.Preferably, lithium from
After sub- battery dismantling, isolated anode, cathode, diaphragm, electrolyte, aluminum plastic film are cleaned using dimethyl carbonate.Finally,
The combustion heat value of lithium ion cell positive, cathode, diaphragm, electrolyte, aluminum plastic film is measured by calorimeter, and measures anode and electricity
Solve the combustion heat value under combustion heat value, cathode and the coexistent electrolyte solution under liquid coexists；Electrolyte under anode and coexistent electrolyte solution
For the half of the electrolyte of lithium ion battery dismantling, wherein positive quality and lithium ion battery disassemble it is positive identical in quality；It is negative
Electrolyte under pole and coexistent electrolyte solution is the half of the electrolyte of lithium ion battery dismantling, wherein cathode quality and lithium-ion electric
The cathode of pond dismantling is identical in quality；That is, lithium ion battery dismantling electrolyte be divided into two parts, respectively with lithium-ion electric
The anode and cathode of pond dismantling coexist.Wherein, each section combustion heat value, that is, lithium ion battery dismantling anode, cathode, diaphragm, electricity
Solve the combustion heat value of liquid, aluminum plastic film, the combustion heat value Q under anode and coexistent electrolyte solution(c,e), combustion under cathode and coexistent electrolyte solution
Heat value Q(a, e)It can be measured by identical mass ratio, that is, need to only guarantee that lower anode coexists when measuring and the mass ratio of electrolyte is
Twice of the mass ratio of the anode and electrolyte of lithium ion battery dismantling, and then calculate the combustion heat under anode and coexistent electrolyte solution
Value Q(c, e), combustion heat value Q under cathode and coexistent electrolyte solution(a, e)It can refer to the combustion heat value under anode and coexistent electrolyte solution
Q(c, e)Measurement method.Preferably, calorimeter is oxygen bomb calorimeter.
Wherein, without sequencing between thermal runaway measuring process S1 and dismantling measuring process S2.
Step S3 is calculated, according to the combustion heat value that thermal runaway measuring process S1 and combustion heat measuring process S2 is measured, is used
Weighting scheme calculates the energy discharged during lithium ion battery thermal runaway.
Specifically, according to combustion heat value, that is, lithium-ion electric of thermal runaway measuring process S1 and dismantling measuring process S2 measurement
The combustion heat value Q of residue after the thermal runaway of pond(z)With anode, cathode, diaphragm, electrolyte, the aluminum plastic film of lithium ion battery dismantling
Combustion heat value, anode and the combustion heat value Q under coexistent electrolyte solution(c, e), combustion heat value Q under cathode and coexistent electrolyte solution(a, e),
The energy Q discharged during lithium ion battery thermal runaway is calculated using weighting scheme(r), to carry out outside lithium ion battery accordingly
The safeguard procedures in portion, and then endanger and be preferably minimized caused by cells burst is exploded, and delay becoming for fire spread as far as possible
Gesture is raced against time for personnel escape and fire-fighting emergent.Especially, using being calculated using weighting scheme, improve lithium from
The energy Q discharged during sub- battery thermal runaway(r)The accuracy of calculating, and then further increase to lithium ion battery thermal runaway
The cognition of the energy discharged in the process to improve the accuracy of the safeguard procedures outside lithium ion battery, and then is further prolonged
The trend of slow fire spread strives for more times for personnel escape and fire-fighting emergent.
It referring to fig. 2, is the flow diagram provided in an embodiment of the present invention for calculating step.As shown, calculating step
S3 includes following sub-step:
Cells burst heat calculates sub-step S31, according to the combustion heat value of dismantling measuring process S2 measurement, using weighting scheme
Calculate the combustion heat value of lithium ion battery.
Specifically, according to dismantling measuring process S2 measurement combustion heat value, that is, lithium ion battery dismantling anode, cathode,
Diaphragm, electrolyte, aluminum plastic film combustion heat value, anode and coexistent electrolyte solution under combustion heat value Q(c, e), cathode and electrolyte are total
The combustion heat value Q left(a, e), the combustion heat value Q of lithium ion battery is calculated using weighting scheme, is calculated and is improved using weighting scheme
The accuracy that the combustion heat value Q of lithium ion battery is calculated, and then improve the energy discharged during lithium ion battery thermal runaway
Q(r)The accuracy of calculating.The calculation formula of the combustion heat value Q of ion battery is as follows:
Q=mQ(c, e)+nQ(a, e)+oQ(e)+(1-m)Q(c)+(1-n)Q(a)+Q(g)+Q(l)+Q(s)
In formula, m, n, o (0≤m, n, o≤1) are correction factor, Q(c, e)For anode and coexistent electrolyte solution under combustion heat value,
Q(a,e)For the combustion heat value under cathode and coexistent electrolyte solution, Q(e)For the combustion heat value of the electrolyte of lithium ion battery dismantling, Q(c)
For the combustion heat value of the anode of lithium ion battery dismantling, Q(a)For the combustion heat value of the cathode of lithium ion battery dismantling, Q(g)For lithium
The combustion heat value of the diaphragm of ion battery dismantling, Q(l)For the combustion heat value of the aluminum plastic film of lithium ion battery dismantling, Q(s)For can not
Backheating.
It wherein, can not backheating Q(s)Can be by the way that the positive and negative anodes of lithium ion battery be shorted, lithium ion battery in measuring circuit
Voltage U, circuit electric current I and be shorted to time t when voltage in circuit is reduced to zero certainly, can not backheating Q(s)=UIt.
Capacity calculation sub-step S32 calculates the combustion heat for the lithium ion battery that sub-step S31 is calculated according to cells burst heat
The combustion heat value of value and thermal runaway measuring process measurement S1 lithium ion, calculates the energy discharged during lithium ion battery thermal runaway
Amount.
Specifically, according to cells burst heat calculate sub-step S31 calculate lithium ion battery combustion heat value Q and lithium from
The combustion heat value Q of residue after sub- battery thermal runaway(z), calculate the energy Q discharged during lithium ion battery thermal runaway(r)；Its
In, the energy Q of release during lithium ion battery thermal runaway(r)Calculation formula it is as follows:
Q(r)=Q-Q(z)
In formula, Q is the combustion heat value of lithium ion battery, Q(z)For the combustion heat value of the residue after lithium ion battery thermal runaway.
The energy Q discharged during lithium ion battery thermal runaway is calculated with above-mentioned formula(r), combine lithium ion battery lithium
Remaining energy balane after the combustion heat value and thermal runaway of ion battery, during further ensuring lithium ion battery thermal runaway
The accuracy of the energy balane of release.
In the present embodiment by taking 10Ah LiFePO4 soft bag lithium ionic cell as an example to lithium ion battery thermal runaway during
Energy spectrometer is described in detail:
Firstly, 0%SOC 10Ah LiFePO4 soft bag lithium ionic cell, heat abuse is carried out to it and induces thermal runaway experiment,
Battery burns in 170 DEG C of generation thermal runaways, and battery self-temperature reaches as high as 420 DEG C, after it extinguishes cooling, collects
Its residue.Using the combustion heat value of oxygen bomb calorimeter measurement residue, obtains residue and release 570.35KJ heat, i.e. 0%SOC altogether
The combustion heat value Q of residue after the burning of 10Ah LiFePO4 soft bag lithium ionic cell(z)=570.35KJ；And to 0%SOC 10Ah
LiFePO4 soft bag lithium ionic cell is disassembled in glove box, is obtained aluminum plastic film, positive plate, negative electrode tab, diaphragm, is used carbonic acid
After dimethyl ester cleaning, its combustion heat value surveyed respectively using oxygen bomb calorimeter is 43.45KJ, 225.23KJ, 533.27KJ,
223.31KJ, the combustion heat value using oxygen bomb calorimeter measurement electrolyte is 443.82KJ；And using oxygen bomb calorimeter measurement just/
(wherein positive/negative quality is that positive gross mass, electrolyte quality are in battery to combustion heat value under negative electrode material and coexistent electrolyte solution
1/2 in battery), obtaining combustion heat value is respectively 556.38KJ and 835.46KJ；
Then, it is assumed that there is 1/2 electrolyte that spontaneous combustion occurs, then, m=n=0.25, o=0.5, the meter in the way of weighting
Calculate the combustion heat value of ferric phosphate lithium ion battery are as follows: Q=1405.51KJ；
Finally, according to the combustion heat value of ferric phosphate lithium ion battery and 0%SOC 10Ah LiFePO4 Soft Roll lithium-ion electric
The combustion heat value of residue after the thermal runaway of pond calculates the energy Q discharged during lithium ion battery thermal runaway(r)=835.16KJ.
To sum up, the Energy Analysis for High during lithium ion battery thermal runaway provided in this embodiment, using indirect mode
Lithium ion battery thermal runaway front and back combustion heat value is measured, thus using releasing during weighting scheme analysis lithium ion battery thermal runaway
Exoergic amount to carry out the safeguard procedures outside lithium ion battery accordingly, and then is endangered caused by cells burst is exploded and is dropped to
It is minimum, and delay the trend of fire spread as far as possible, it races against time for personnel escape and fire-fighting emergent.
Especially, it is calculated using using weighting scheme, improves the energy discharged during lithium ion battery thermal runaway
Measure Q(r)The accuracy of calculating, and then the cognition to the energy discharged during lithium ion battery thermal runaway is further increased, thus
The accuracy of the safeguard procedures outside lithium ion battery is improved, and then further delays the trend of fire spread, is personnel escape
And fire-fighting emergent strives for more times.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (9)
1. the Energy Analysis for High during a kind of lithium ion battery thermal runaway, which comprises the steps of:
Thermal runaway measuring process, a selected lithium ion battery carries out thermal runaway experiment to it, after collecting lithium ion battery thermal runaway
Residue and pass through calorimeter measure residue combustion heat value；
Measuring process is disassembled, selectes the lithium ion battery selected with the thermal runaway measuring process with another lithium-ion electric of state
It is disassembled in pond, and separation anode, cathode, electrolyte, diaphragm, aluminum plastic film simultaneously measure anode, cathode, electricity by calorimeter
Solve the combustion heat value of liquid, diaphragm, aluminum plastic film, and by calorimeter measurement measurement anode with coexistent electrolyte solution under combustion heat value,
Combustion heat value under cathode and coexistent electrolyte solution；Electrolyte under the anode and coexistent electrolyte solution is lithium battery dismantling
The half of electrolyte；Electrolyte under the cathode and coexistent electrolyte solution is the half of the electrolyte of lithium battery dismantling；
Step is calculated, according to the combustion heat value of the thermal runaway measuring process and the dismantling measuring process measurement, using weighting
Mode calculates the energy discharged during the lithium ion battery thermal runaway.
2. the Energy Analysis for High during lithium ion battery thermal runaway according to claim 1, which is characterized in that described
Calculating step includes following sub-step:
Cells burst heat calculates sub-step, according to the combustion heat value of the dismantling measuring process measurement, is calculated using weighting scheme
The combustion heat value of lithium ion battery；
Capacity calculation sub-step calculates combustion heat value and the institute of the lithium ion battery that sub-step calculates according to the cells burst heat
The lithium ion combustion heat value for stating the measurement of thermal runaway measuring process calculates the energy discharged during the lithium ion battery thermal runaway
Amount.
3. the Energy Analysis for High during lithium ion battery thermal runaway according to claim 2, which is characterized in that in institute
It states cells burst heat to calculate in sub-step, the calculation formula of the combustion heat value Q of the lithium ion battery is as follows:
Q=mQ(c,e)+nQ(a,e)+oQ(e)+(1-m)Q(c)+(1-n)Q(a)+Q(g)+Q(l)+Q(s)
In formula, m, n, o (0≤m, n, o≤1) are correction factor, Q(c,e)For it is described anode and coexistent electrolyte solution under combustion heat value,
Q(a,e)For the combustion heat value under the cathode and coexistent electrolyte solution, Q(e)For the burning of the electrolyte of lithium ion battery dismantling
Calorific value, Q(c)For the combustion heat value of the anode of lithium ion battery dismantling, Q(a)For the cathode of lithium ion battery dismantling
Combustion heat value, Q(g)For the combustion heat value of the diaphragm of lithium ion battery dismantling, Q(l)For the aluminium of lithium ion battery dismantling
The combustion heat value of plastic film, Q(s)For can not backheating.
4. the Energy Analysis for High during lithium ion battery thermal runaway according to claim 2, which is characterized in that in energy
Power calculates in sub-step, the energy Q discharged during the lithium ion battery thermal runaway(r)Calculation formula it is as follows:
Q(r)=Q-Q(z)
In formula, Q is the combustion heat value of lithium ion battery, Q(z)For the combustion heat value of the residue after the lithium ion battery thermal runaway.
5. the Energy Analysis for High during lithium ion battery thermal runaway according to any one of claims 1 to 4, feature
It is,
In the thermal runaway measuring process or the dismantling measuring process, the combustion heat value of each section is surveyed in the following way
Amount:
Substance is divided into several pieces, by measuring the combustion heat value of a copy of it, calculates the combustion heat value of the substance.
6. the Energy Analysis for High during lithium ion battery thermal runaway according to any one of claims 1 to 4, feature
It is,
In the thermal runaway measuring process or the dismantling measuring process, the calorimeter is oxygen bomb calorimeter.
7. the Energy Analysis for High during lithium ion battery thermal runaway according to any one of claims 1 to 4, feature
It is,
In the thermal runaway measuring process, using overcharge, short circuit, heat abuse or needle thorn mode induce the lithium ion battery and send out
Heat is out of control.
8. the Energy Analysis for High during lithium ion battery thermal runaway according to any one of claims 1 to 4, feature
It is,
In the dismantling measuring process, the lithium ion battery of dismantling is full electric state state, and dismantling behaviour is carried out in glove box
Make.
9. the Energy Analysis for High during lithium ion battery thermal runaway according to any one of claims 1 to 4, feature
It is,
In the dismantling measuring process, after lithium ion battery dismantling, using dimethyl carbonate to the positive, negative of separation
Pole, diaphragm, electrolyte, aluminum plastic film are cleaned.
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| CN110968968A (en) * | 2019-12-05 | 2020-04-07 | 西南交通大学 | Thermal runaway simulation method based on needling internal short circuit lithium ion battery |
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