CN103344359A - Method for dynamic measurement of heat generated by secondary battery in cyclic process - Google Patents
Method for dynamic measurement of heat generated by secondary battery in cyclic process Download PDFInfo
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- CN103344359A CN103344359A CN2013102602970A CN201310260297A CN103344359A CN 103344359 A CN103344359 A CN 103344359A CN 2013102602970 A CN2013102602970 A CN 2013102602970A CN 201310260297 A CN201310260297 A CN 201310260297A CN 103344359 A CN103344359 A CN 103344359A
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Abstract
The invention discloses a method for dynamic measurement of heat generated by a secondary battery in a cyclic process. The method comprises the steps that a secondary battery to be measured is placed in an accelerating rate calorimeter and connected with a battery charge and discharge tester; charge and discharge parameters of the secondary battery to be measured are set in the battery charge and discharge tester; working parameters are set in the accelerating rate calorimeter; the battery charge and discharge tester and the accelerating rate calorimeter are started; the temperature data of the secondary battery to be measured in the charge and discharge process are acquired; the amount of heat generated by the secondary battery to be measured in the charge and discharge process is calculated according to the acquired temperature data. The method can be used for accurately measuring the amount of the heat generated by the secondary battery in the charge and discharge process under the adiabatic condition in real time.
Description
Technical field
The present invention relates to secondary cell heat production technical field of measuring, more particularly, relate to the method for a kind of kinetic measurement secondary cell heat production in cyclic process.
Background technology
Secondary cell (Rechargeable battery) refers to can make active substance activate the battery that continues use by the mode of charging behind battery discharge.Secondary cell can recycle, and compares with one-shot battery, has advantages such as economic, practical, environmental protection, has therefore obtained using widely.Wherein, the lithium ion battery that occur the nineties in 20th century, as the representative of secondary cell, but have voltage height, specific energy height, have extended cycle life, advantages such as self-discharge rate is low, memory-less effect fast charging and discharging, non-environmental-pollution, become one of widely used energy of portable set.Be the secondary cell of representative safety normally under regular service condition with the lithium ion battery, but there are serious potential safety hazard in its thermotolerance and anti-abuse ability.Especially for the power lithium-ion battery of electric automobile (EV) and hybrid vehicle (HEV), it can produce the discharge current that exceeds many times of rated current when high power discharge, produces a large amount of heat, causes the thermal runaway reaction of battery and blasts.Both at home and abroad media report a large amount of lithium ion battery explosion accidents.
Thermal safety is generally believed it is the main bottleneck that hinders the power lithium-ion battery development, and relevant scholar has carried out big quantity research from many aspects to the security of lithium ion battery.Present research mainly concentrates on thermal stability and the flame-retardant additive aspect of battery material, and is less relatively to the research of monoblock battery, and because the restriction of experimental apparatus is then few to the dynamic Measurement Study of monoblock battery heat production in charge and discharge process.And actual battery fire explosion takes place mostly in use, especially takes place when non-stationary uses, and therefore, measures battery in use, and namely the quantity of heat production in the charge and discharge process is significant.
Summary of the invention
In view of this, the invention provides the method for a kind of kinetic measurement secondary cell heat production in cyclic process, can measure the quantity of heat production in the charging/discharging of secondary cell process under adiabatic condition in real time accurately.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the method for a kind of kinetic measurement secondary cell heat production in cyclic process comprises:
Secondary cell to be measured is installed in the accelerating calorimeter, and secondary cell to be measured is connected with the battery charging and discharging tester;
Charging/discharging of secondary cell parameter to be measured is set in the battery charging and discharging tester;
Running parameter is set in accelerating calorimeter;
Start battery charging and discharging tester and accelerating calorimeter;
Obtain the temperature data of secondary cell to be measured in charge and discharge process;
Calculate the quantity of heat production of secondary cell to be measured in charge and discharge process according to the temperature data that obtains.
Preferably, described secondary cell to be measured is installed in the accelerating calorimeter, and will also comprises before secondary cell to be measured and the battery charging and discharging tester step of connecting:
By the battery charging and discharging tester secondary cell to be measured is discharged and recharged operation.
Preferably, described by the battery charging and discharging tester to secondary cell to be measured discharge and recharge the operation be specially:
Secondary cell to be measured is left standstill 1min;
Secondary cell to be measured is carried out constant-current discharge with the electric current of setting;
To leave standstill 5min through the secondary cell to be measured behind the constant-current discharge;
Secondary cell to be measured is carried out constant-current charge with the electric current of setting;
To leave standstill 5min through the secondary cell to be measured behind the constant-current charge;
Circulate and stop behind the above-mentioned charge and discharge process 3 times.
Preferably, describedly charging/discharging of secondary cell parameter to be measured be set in the battery charging and discharging tester be specially:
Set the electric current of secondary cell constant current charge-discharge to be measured;
Set the time of repose behind the secondary cell constant-current discharge to be measured;
Set the time of repose behind the secondary cell constant-current charge to be measured;
Set the charge and discharge cycles number of times of secondary cell to be measured.
Preferably, the electric current of described secondary cell constant current charge-discharge to be measured is 110mA or 220mA.
Preferably, behind the described secondary cell constant-current discharge to be measured or the charging after time of repose be 5min.
Preferably, the charge and discharge cycles number of times of described secondary cell to be measured is 5 times.
Preferably, the described running parameter that arranges in accelerating calorimeter is specially:
Set the initial temperature of accelerating calorimeter;
Set the heating rate of accelerating calorimeter.
Preferably, the initial temperature of described accelerating calorimeter is 25 ℃ or 60 ℃.
Preferably, the heating rate of described accelerating calorimeter is 0.005 ℃/min.
From above-mentioned technical scheme as can be seen, the method of kinetic measurement secondary cell disclosed by the invention heat production in cyclic process, by secondary cell to be measured is installed in the accelerating calorimeter, can make secondary cell to be measured and external environment keep the minimum temperature difference, when discharging and recharging being installed in secondary cell to be measured in the accelerating calorimeter by the battery charging and discharging tester, can measure the quantity of heat production in the charging/discharging of secondary cell process to be measured under the adiabatic condition in real time accurately, and then can carry out quantitative test to secondary cell to be measured.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the method flow diagram of the disclosed a kind of kinetic measurement secondary cell of embodiment of the invention heat production in cyclic process;
Fig. 2 is the method flow diagram of the disclosed a kind of kinetic measurement secondary cell of another embodiment of the present invention heat production in cyclic process;
Fig. 3 charges and discharge electrograph for example 1 secondary cell to be measured of the present invention in the accelerating calorimeter outer loop;
Fig. 4 charges and discharge electrograph for example 1 secondary cell to be measured of the present invention in the accelerating calorimeter inner loop;
Fig. 5 is example 1 secondary cell voltage/temperature to be measured-time plot of the present invention;
Fig. 6 is example 1 secondary cell electric current/temperature to be measured-time plot of the present invention;
Fig. 7 is example 1 secondary cell temperature rise rate-thetagram to be measured of the present invention;
Fig. 8 charges and discharge electrograph for example 2 secondary cells to be measured of the present invention in the accelerating calorimeter outer loop;
Fig. 9 charges and discharge electrograph for example 2 secondary cells to be measured of the present invention in the accelerating calorimeter inner loop;
Figure 10 is example 2 secondary cell voltage/temperature to be measured-time plots of the present invention;
Figure 11 is example 2 secondary cell electric current/temperature to be measured-time plots of the present invention;
Figure 12 is example 2 secondary cell temperature rise rate-thetagrams to be measured of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the invention discloses the method for a kind of kinetic measurement secondary cell heat production in cyclic process, can measure the quantity of heat production in the charging/discharging of secondary cell process under adiabatic condition in real time accurately.
As shown in Figure 1, the method for a kind of kinetic measurement secondary cell heat production in cyclic process comprises:
S101, secondary cell to be measured is installed in the accelerating calorimeter, and secondary cell to be measured is connected with the battery charging and discharging tester;
S102, charging/discharging of secondary cell parameter to be measured is set in the battery charging and discharging tester;
S103, running parameter is set in accelerating calorimeter;
S104, startup battery charging and discharging tester and accelerating calorimeter;
S105, obtain the temperature data of secondary cell to be measured in charge and discharge process;
The temperature data that S106, basis are obtained calculates the quantity of heat production of secondary cell to be measured in charge and discharge process.
In the above-described embodiments, the battery charging and discharging tester is one of widely used infrastructure device of battery production producer and battery scientific research institution, is applicable to multiple secondary cells such as lithium ion battery, lighium polymer, ni-mh, NI-G.By setting program and parameter, the battery charging and discharging tester just can be finished the multiple cycle charge-discharge operation that secondary cell is arranged.Accelerating calorimeter (Accelerating Rate Calorimeter) is called for short ARC, is made up of explosion-proof cavity (inclusive reaction stove), switch board and control computer, is one of important tool of reactive chemical thermal hazard evaluation.It is a kind of adiabatic calorimeter, and this instrument is by guaranteeing have minimum heat interchange to reach adiabatic condition between reactant system and the environment.This minimum thermal exchange can keep the minimum temperature difference to realize by making between sample of reaction mass and environment.Utilize this instrument can obtain the heat generation characteristic of reactant under the approximate adiabatic condition and pressure characteristic etc. with the variation of temperature rule.Both couplings can be realized real-time measurement to secondary cell temperature variation in charge and discharge process.
The body of heater of accelerating calorimeter is made up of bottom, sidepiece and top.Heating wire in order to heating all is installed at each position of body of heater, on bottom, sidepiece and the top of body of heater the temperature that 3 thermopairs are measured 3 different parts of body of heater respectively is installed simultaneously, with the mean value of these 3 temperature medial temperature as body of heater.Reaction vessel is installed in the middle position of body of heater, 1 thermopair is installed in order to measure the temperature of sample course of reaction in the outside portion (being close to reaction vessel) of reaction vessel.During experiment, the size of current that is carried in the heating wire on each position of body of heater by control is regulated the balance of temperature between furnace body temperature and the reaction vessel, to guarantee the thermal insulation of course of reaction.Take off the reaction vessel of accelerating calorimeter in the present embodiment, secondary cell to be measured is fixed on this position.
Concrete, get 2 lead or peripheral nickel straps that twine the high-temperature insulation adhesive tape that are about 80cm, the one end is connected with the both positive and negative polarity of secondary cell to be measured respectively.Get a bit of nickel strap again and curve U-shapedly, the two ends of U-shaped nickel strap are welded on secondary cell to be measured both sides respectively, constitute one and can collude hanging hang structure.
Open the explosion-proof cavity of accelerating calorimeter, the loam cake of reacting furnace is mentioned and fixing, take off reaction vessel.Other gets one section nickel strap and passes the U-shaped nickel strap of secondary cell to be measured and be wrapped on the screw thread of fixing former reaction vessel and secondary cell to be measured can be suspended in the reacting furnace.The high-temperature insulation adhesive tape should be twined in above-mentioned U-shaped nickel strap and the nickel strap periphery that is wrapped on the screw thread, and can be high temperature resistant by other, good toughness, not easily broken strip material substitute.
After secondary cell to be measured fixes in reacting furnace, the other end of two nickel straps is passed and is connected with the crocodile clip of battery charging and discharging tester from the circular hole on the explosion-proof cavity.Put down the reacting furnace loam cake, close explosion-proof cavity.
According to the test operating mode, the parameter that discharges and recharges of secondary cell to be measured is set in the battery charging and discharging tester.Running parameter is set in accelerating calorimeter.The experimental arrangement of accelerating calorimeter is as follows usually: set an initial temperature earlier, instrument enters the automatic search phase behind constant temperature 10-20min under this temperature, if instrument is less in the heating speed that this temperature test does not detect the heating phenomenon of reactive chemical or reactive chemical, the heating rate of sample and container is less than 0.02 ℃/min(Temperature Rate Sensitivity), then instrument enters next heating schedule automatically, rise to the next temperature of setting with certain heating rate, carry out the program same with previous temperature in this temperature, after the heating rate that detects when it reaches 0.02 ℃/min, instrument will enter automatic trace routine.That is to say that program is to carry out the program of " intensification-constant temperature-search " repeatedly, when certain temperature, the heating rate of sample and container greater than 0.02 ℃/min after, instrument will enter automatic trace routine, finish until experiment.
In the present invention, secondary cell to be measured does not need extra heating, only needs accelerating calorimeter that adiabatic environment and the temperature variation of following the tracks of mesuring battary are provided.Therefore, in program arranged, initial temperature (Temperature Step) will be made as 0 ℃, and rate of temperature rise (Temperature Rate Sensitivity) should be set to 0.005 ℃/min, and this is sensitivity minimization.So just can guarantee the exothermic process of the tracking secondary cell to be measured that accelerating calorimeter is complete, other parameter can arrange voluntarily according to user's request.
The running parameter of accelerating calorimeter starts battery charging and discharging tester and accelerating calorimeter after setting completed.At first, accelerating calorimeter can be heated to set initial temperature with " Heat " pattern, enters " wait " pattern then." wait " pattern changes " seek " pattern over to after finishing, and at this moment clicks " mode " option, selects " Exotherm ", manually changes " heat release pattern " over to.Simultaneously, start the battery charging and discharging tester, just can measure the temperature variation of secondary cell to be measured in the middle of charge and discharge process in real time.
After obtaining the temperature data of secondary cell to be measured in charge and discharge process, can calculate secondary cell to be measured at quantity of heat production and total quantity of heat production of each exothermic phase according to following formula.
ΔH=mc
pΔT
ad
Wherein, Δ H is reaction heat, and unit is J; M is the quality of mesuring battary, and unit is g; c
pBe the specific heat capacity of mesuring battary, unit is J/ (g K); Δ T
AdBe adiabatic temperature rise, unit is K.
For data that discharge and recharge to secondary cell to be measured better are analyzed, on the basis of above-described embodiment, before secondary cell to be measured carries out the accelerating calorimeter test, discharge and recharge operation in the accelerating calorimeter outside earlier.Concrete, as shown in Figure 2, the method for a kind of kinetic measurement secondary cell heat production in cyclic process comprises:
S201, by the battery charging and discharging tester secondary cell to be measured is discharged and recharged operation;
S202, secondary cell to be measured is installed in the accelerating calorimeter, and secondary cell to be measured is connected with the battery charging and discharging tester;
S203, charging/discharging of secondary cell parameter to be measured is set in the battery charging and discharging tester;
S204, running parameter is set in accelerating calorimeter;
S205, startup battery charging and discharging tester and accelerating calorimeter;
S206, obtain the temperature data of secondary cell to be measured in charge and discharge process;
The temperature data that S207, basis are obtained calculates the quantity of heat production of secondary cell to be measured in charge and discharge process.
Concrete, step S201 discharges and recharges operation by the battery charging and discharging tester to secondary cell to be measured and is specially:
Secondary cell to be measured is left standstill 1min;
Secondary cell to be measured is carried out constant-current discharge with the electric current of setting;
To leave standstill 5min through the secondary cell to be measured behind the constant-current discharge;
Secondary cell to be measured is carried out constant-current charge with the electric current of setting;
To leave standstill 5min through the secondary cell to be measured behind the constant-current charge;
Circulate and stop behind the above-mentioned charge and discharge process 3 times.
In above-described embodiment, the process that secondary cell to be measured is tested in accelerating calorimeter is identical with last embodiment, does not repeat them here.
Following is concrete example of the present invention.
Example 1:
The secondary cell to be measured that this example is chosen is: be commercial rectangular lithium ion battery, positive active material is cobalt acid lithium.The battery rated capacity is 1100mAh, and model is that 424060(is thick be 4.2mm, the wide 40mm of being, the long 60mm of being).The quality of battery is 24.0g, and specific heat capacity is 1.0J/ (g K).One end of two nickel straps is welded with the both positive and negative polarity of battery respectively, and the other end is connected with the crocodile clip of charge and discharge cycles instrument respectively.By the above-mentioned system that discharges and recharges the circulation instrument is carried out the parameter setting, wherein electric current is set to 110mA, namely battery is carried out the charge and discharge cycles of 0.1C multiplying power, and setting completed for parameter, starts the battery charging and discharging tester.
Secondary cell to be measured places secondary cell to be measured in the reacting furnace of accelerating calorimeter according to the method for the above-mentioned fixing secondary cell of mentioning to be measured, and nickel strap is connected with the battery charging and discharging tester again after the accelerating calorimeter outer loop finishes.The setting of battery charging and discharging tester parameter as mentioned above, wherein the electric current setting still is 110mA, cycle index is 5 times.Being set to of accelerating calorimeter parameter: initial temperature is made as: Start Temperature:25 ℃; End Temperature:325 ℃; Temperature Step:0; Sensitivity:0.005 ℃/min of Temperature Rate; Wait Time:10min; Step:0.2 ℃/min of Calculation Temperature; Cool Temperature:25 ℃.
Secondary cell to be measured discharges and recharges the cyclic curve that obtains of operation as shown in Figure 3 in the accelerating calorimeter outside.As can be seen from the figure, the cyclic process of secondary cell to be measured under normal condition is very steady normal.Fig. 4 carries out the battery cyclic curve figure that obtains when the inner experiment of accelerating calorimeter for this secondary cell to be measured, secondary cell to be measured has all kept good working order in preceding four circulations, but the charging process of the 5th circulation is obviously disorderly, illustrate that secondary cell to be measured breaks down at this moment, the ability that basic forfeiture normally discharges and recharges.
The temperature variations of secondary cell to be measured in the middle of charge and discharge process as shown in Figure 5 and Figure 6.As can be seen from the figure, mesuring battary has tangible temperature rise at discharge regime, and the charging stage temperature has a little decline or keep a certain constant value, but temperature is totally in rising trend.In addition, at the charging stage battery of the 5th circulation thermal runaway has taken place, maximum temperature has reached 435.45 ℃, is natural cooling process afterwards.Fig. 7 is secondary cell temperature rise rate-thetagram to be measured, and as can be seen from the figure, the temperature rise rate of secondary cell to be measured before 100 ℃ changes little, substantially 0.1 ℃/below the min.The temperature rise rate of secondary cell to be measured linearly rises after 100 ℃, is up to 208 ℃/min.
Calculating the quantity of heat production of battery in each stage according to the temperature data of secondary cell to be measured in discharge process is respectively: first discharge regime, 437.84J; Second discharge regime, 435.92J; The 3rd discharge regime, 441.20J; The 4th discharge regime, 494.19J; The 5th discharge regime, 565.16J; The thermal runaway stage, 6406.44J.Based on above data, can be 8780.74J in the hope of the quantity of heat production of battery in whole test process.
Example 2:
The secondary cell to be measured that this example is chosen is: be commercial rectangular lithium ion battery, positive active material is cobalt acid lithium.The battery rated capacity is 1100mAh, and model is that 424060(is thick be 4.2mm, the wide 40mm of being, the long 60mm of being).The quality of battery is 24.0g, and specific heat capacity is 1.0J/ (g K).One end of two nickel straps is welded with the both positive and negative polarity of battery respectively, and the other end is connected with the crocodile clip of charge and discharge cycles instrument respectively.By the above-mentioned system that discharges and recharges parameter is arranged, wherein electric current is set to 220mA, namely battery is carried out the charge and discharge cycles of 0.2C multiplying power, and setting completed for parameter, starts the battery charging and discharging tester.
Electric secondary to be measured pond places secondary cell to be measured in the reacting furnace of accelerating calorimeter according to the method for the above-mentioned fixing secondary cell of mentioning to be measured, and nickel strap is connected with the battery charging and discharging tester again after the accelerating calorimeter outer loop finishes.The setting of battery charging and discharging tester parameter as mentioned above, wherein the electric current setting still is 220mA, cycle index is 5 times.Being set to of accelerating calorimeter parameter: Start Temperature:60 ℃; End Temperature:325 ℃; Temperature Step:0; Sensitivity:0.005 ℃/min of Temperature Rate; Wait Time:10min; Step:0.2 ℃/min of Calculation Temperature; Cool Temperature:25 ℃.
Fig. 8 discharges and recharges the cyclic curve that operation obtains for secondary cell to be measured in the accelerating calorimeter outside, secondary cell to be measured circulates under normal condition normally.The secondary cell cyclic curve to be measured that this secondary cell to be measured obtains when carrying out the accelerating calorimeter experiment in accelerating calorimeter inside as shown in Figure 9.As can be seen, because the raising of initial temperature and the increase of electric current, secondary cell to be measured is relatively poor at the circulating effect of accelerating calorimeter inside.Since second circulation, disorderly state has all appearred in the electric current of battery and voltage curve, and secondary cell to be measured breaks down subsequently, the ability that thorough forfeiture normally discharges and recharges.
The temperature variations of secondary cell to be measured in the middle of charge and discharge process as shown in Figure 10 and Figure 11.Secondary cell to be measured has tangible temperature rise at discharge regime first, and the charging stage temperature has slight decline, raises again subsequently.After secondary cell to be measured lost efficacy, it is big that its temperature rise rate obviously becomes, and thermal runaway takes place subsequently, and maximum temperature reaches 326.74 ℃.Figure 12 is this secondary cell temperature rise rate-thetagram to be measured, and the temperature rise rate of battery changes fluctuation greatly, and the value between 130～225 ℃ is higher.
Equally, according to the quantity of heat production computing formula, can calculate secondary cell to be measured is 619.77J at the quantity of heat production of first discharge regime; The quantity of heat production of second discharge regime is 672.50; Thermal runaway stage heat production 4976.91J.Total quantity of heat production is 6269.18J.
By above instance analysis as can be seen, the present invention can measure the temperature variations of secondary cell in the cycle charge discharge electric process well.And, by relevant theoretical analysis, can calculate battery at quantity of heat production and total quantity of heat production in each stage by temperature data, and then battery is carried out quantitative test.By measuring the heat release situation of different capabilities battery under the different multiplying electric current under the different initial temperatures, can further analyze initial temperature, battery capacity and charging and discharging currents to the influence of battery heat production.
Each embodiment adopts the mode of going forward one by one to describe in this instructions, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. the method for kinetic measurement secondary cell heat production in cyclic process is characterized in that, comprising:
Secondary cell to be measured is installed in the accelerating calorimeter, and secondary cell to be measured is connected with the battery charging and discharging tester;
Charging/discharging of secondary cell parameter to be measured is set in the battery charging and discharging tester;
Running parameter is set in accelerating calorimeter;
Start battery charging and discharging tester and accelerating calorimeter;
Obtain the temperature data of secondary cell to be measured in charge and discharge process;
Calculate the quantity of heat production of secondary cell to be measured in charge and discharge process according to the temperature data that obtains.
2. method according to claim 1 is characterized in that, described secondary cell to be measured is installed in the accelerating calorimeter, and will also comprises before secondary cell to be measured and the battery charging and discharging tester step of connecting:
By the battery charging and discharging tester secondary cell to be measured is discharged and recharged operation.
3. method according to claim 2 is characterized in that, described by the battery charging and discharging tester to secondary cell to be measured discharge and recharge the operation be specially:
Secondary cell to be measured is left standstill 1min;
Secondary cell to be measured is carried out constant-current discharge with the electric current of setting;
To leave standstill 5min through the secondary cell to be measured behind the constant-current discharge;
Secondary cell to be measured is carried out constant-current charge with the electric current of setting;
To leave standstill 5min through the secondary cell to be measured behind the constant-current charge;
Circulate and stop behind the above-mentioned charge and discharge process 3 times.
4. method according to claim 1 is characterized in that, describedly charging/discharging of secondary cell parameter to be measured is set in the battery charging and discharging tester is specially:
Set the electric current of secondary cell constant current charge-discharge to be measured;
Set the time of repose behind the secondary cell constant-current discharge to be measured;
Set the time of repose behind the secondary cell constant-current charge to be measured;
Set the charge and discharge cycles number of times of secondary cell to be measured.
5. method according to claim 4 is characterized in that, the electric current of described secondary cell constant current charge-discharge to be measured is 110mA or 220mA.
6. method according to claim 4 is characterized in that, behind the described secondary cell constant-current discharge to be measured or the charging after time of repose be 5min.
7. method according to claim 4 is characterized in that, the charge and discharge cycles number of times of described secondary cell to be measured is 5 times.
8. method according to claim 1 is characterized in that, the described running parameter that arranges in accelerating calorimeter is specially:
Set the initial temperature of accelerating calorimeter;
Set the heating rate of accelerating calorimeter.
9. method according to claim 8 is characterized in that, the initial temperature of described accelerating calorimeter is 25 ℃ or 60 ℃.
10. method according to claim 8 is characterized in that, the heating rate of described accelerating calorimeter is 0.005 ℃/min.
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| CN105242213A (en) * | 2015-10-20 | 2016-01-13 | 盐城工学院 | Method for simultaneously testing reversible heat and irreversible heat of lithium ion battery |
| CN105242213B (en) * | 2015-10-20 | 2017-12-26 | 盐城工学院 | The method that lithium ion battery is reversible and irreversible heat production is tested simultaneously |
| CN111175656A (en) * | 2018-11-13 | 2020-05-19 | 清华大学 | Battery lithium analysis detection method and calculation method of battery lithium death detection parameters |
| CN111175656B (en) * | 2018-11-13 | 2021-05-07 | 清华大学 | Battery lithium analysis detection method and calculation method of battery lithium death detection parameters |
| CN110082687A (en) * | 2019-04-24 | 2019-08-02 | 合肥国轩高科动力能源有限公司 | Power lithium-ion battery heating power measurement method |
| CN113189491A (en) * | 2021-05-19 | 2021-07-30 | 中国科学技术大学 | Method for analyzing heat production rate of cylindrical lithium ion battery |
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