CN110045287A - The quantitative evaluation method and system of power battery thermal runaway safety - Google Patents
The quantitative evaluation method and system of power battery thermal runaway safety Download PDFInfo
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- CN110045287A CN110045287A CN201910259977.8A CN201910259977A CN110045287A CN 110045287 A CN110045287 A CN 110045287A CN 201910259977 A CN201910259977 A CN 201910259977A CN 110045287 A CN110045287 A CN 110045287A
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- thermal runaway
- temperature
- mesuring battary
- safety
- monomer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
Abstract
This application involves the quantitative evaluation methods and system of a kind of power battery thermal runaway safety.The evaluation method includes implementing insulation thermal runaway test to battery cell to be measured.The temperature and voltage of mesuring battary monomer described in real-time monitoring, generate insulation thermal runaway test curve in the insulation thermal runaway test.From the insulation thermal runaway test curve, the maximum temperature during the first temperature of acquisition, second temperature and thermal runaway is as characteristic value.For the mesuring battary monomer of different type or different materials system, its thermal runaway characteristic can be evaluated with unified one or more groups of characteristic values.Battery security is described using the characteristic value that unified test method obtains, the safety of battery newly developed easily can also be subjected to across comparison and evaluation with history battery security data.And this application involves characteristic value it is directly related with single battery thermal runaway internal procedure, can point out specific direction to the improvement of battery thermal safety.
Description
Technical field
This application involves battery technology fields, more particularly to a kind of quantitative assessment side of power battery thermal runaway safety
Method and system.
Background technique
Electric car is the main body of new-energy automobile, and power battery is the core energy source of electric car.Electric car
The number of batteries that continual mileage depends on the specific energy of power battery and electric car carries.Due to electric car space and at
This limitation, the specific energy for improving power battery become the key for increasing electric car continual mileage.Generally, under same volume
The energy of the power battery storage of more high-energy-density is more, and more energy may be released in thermal runaway, brings more tight
The security risk of weight.Therefore, it is necessary to just pacify to the thermal runaway of the power battery of designed system in power battery design process
Full property is sufficiently evaluated and is considered.
Traditional technical solution when carrying out power battery monomer safety evaluatio, mainly for battery cell it is mechanical, electrical,
Thermal runaway characteristic under hot abuse conditions is tested, including needle pierce, overcharge, heat test etc..However, traditional safety is commented
The test of valence relates generally to test the external presentation of battery material and battery cell under heating condition.Traditional evaluation
The index of battery cell safety is mostly qualitative comparison to battery cell thermal runaway phenomenon, and with battery cell thermal runaway when is interior
Portion's change mechanism is unrelated.Only qualitatively evaluation is provided to battery cell thermal runaway safety to be not enough to that battery cell is instructed to design
The improvement of scheme is also not enough to realize the positive prevention and control to battery cell thermal runaway.
Summary of the invention
Based on this, it is necessary to for traditional battery cell thermal runaway safety evaluatio only by qualitative method into
Row, this qualitative evaluating method is unrelated with interior change mechanism when battery cell thermal runaway, is not enough to that battery cell is instructed to set
The improvement of meter scheme, the problem of being also not enough to realize the positive prevention and control to battery cell thermal runaway, therefore a kind of power electric is provided
The quantitative evaluation method and system of pond thermal runaway safety.
A kind of quantitative evaluation method of power battery thermal runaway safety, comprising:
S100 provides mesuring battary monomer, and implements insulation thermal runaway test to the mesuring battary monomer；
S200, the temperature and voltage of mesuring battary monomer described in real-time monitoring, generate in the insulation thermal runaway test
It is insulated thermal runaway test curve；
S300 obtains the characteristic value of the mesuring battary monomer, wherein institute from the insulation thermal runaway test curve
State characteristic value include: the first temperature when the mesuring battary monomer itself starts heat production, it is big inside the mesuring battary monomer
The maximum temperature of second temperature and mesuring battary monomer during thermal runaway when scale heat release starts；
S400, according to the thermal runaway safety of the quantitative evaluation mesuring battary monomer of the characteristic value.
In one embodiment, the S400, according to the heat of the quantitative evaluation mesuring battary monomer of the characteristic value
Runaway safe, comprising:
There is provided corresponding first reference value of normal cell, the second reference value and third reference value, wherein the normal cell
Temperature when temperature when starting heat production is first reference temperature, extensive heat release starts inside the normal cell is institute
State the second reference temperature, maximum temperature of normal cell during thermal runaway is the third reference temperature；
By first temperature, the second temperature and the maximum temperature of the mesuring battary monomer, respectively with institute
First reference temperature, second reference temperature and the third reference temperature for stating normal cell compare；
If first temperature is less than first reference temperature, the thermal runaway safety of the mesuring battary monomer is low
In the thermal runaway safety of the normal cell；
If the second temperature is less than second reference temperature, the thermal runaway safety of the mesuring battary monomer is low
In the thermal runaway safety of the normal cell；
If the maximum temperature is less than the third reference temperature, the thermal runaway of the mesuring battary monomer is highly-safe
In the thermal runaway safety of the normal cell.
In one embodiment, the S400, according to the heat of the quantitative evaluation mesuring battary monomer of the characteristic value
Runaway safe, before further include:
According to the insulation thermal runaway test curve, the change of the temperature-temperature change rate of the mesuring battary monomer is generated
Change curve；
The maximum temperature rise speed of the mesuring battary monomer is obtained from the change curve of the temperature-temperature change rate
Rate；
The characteristic value includes: the maximum temperature rise rate during the power battery generation thermal runaway to be tested；It is described
Maximum temperature rise rate reference value during thermal runaway occurs for normal cell；
The S400, according to the thermal runaway safety of the quantitative evaluation mesuring battary monomer of the characteristic value, comprising:
The maximum temperature rise rate is less than the reference value of the maximum temperature rise rate, then the mesuring battary thermal runaway safety
Property be higher than the normal cell thermal runaway safety.
In one embodiment, the S400, according to the heat of the quantitative evaluation mesuring battary monomer of the characteristic value
Runaway safe, before further include:
Obtained from the insulation thermal runaway test curve, from the mesuring battary monomer since heat production to described to be measured
The time that battery cell thermal runaway starts is denoted as the first time period；And
It is obtained from the insulation thermal runaway test curve, to described to be measured since the mesuring battary monomer thermal runaway
The time that battery cell reaches thermal runaway process maximum temperature is denoted as the second time period；
The characteristic value includes: the first time period and the second time period of the battery cell to be tested；Institute
State the first time period reference value and second time period reference value during normal cell generation thermal runaway；
The S400, according to the thermal runaway safety of the quantitative evaluation mesuring battary monomer of the characteristic value, comprising:
The first time period be greater than the first time period reference value, then the mesuring battary thermal runaway it is highly-safe in
The thermal runaway safety of the normal cell；
The second time period be greater than the second time period reference value, then the mesuring battary thermal runaway it is highly-safe in
The thermal runaway safety of the normal cell.
In one embodiment, the S400, according to the heat of the quantitative evaluation mesuring battary monomer of the characteristic value
Runaway safe further includes passing through one of following steps or the thermal runaway safety of a variety of evaluation mesuring battary monomers
The height of property:
The size of the absolute value of the difference of first reference temperature is subtracted by first temperature for quantitative assessment
The height of the thermal runaway safety of the mesuring battary monomer；Or
The size of the absolute value of the difference of second reference temperature is subtracted by the second temperature for quantitative assessment
The height of the thermal runaway safety of the mesuring battary monomer；Or
The size of the absolute value of the difference of the maximum temperature is subtracted by the third reference temperature for quantitative assessment
The height of the thermal runaway safety of the mesuring battary monomer；Or
The size of the absolute value of the difference of the maximum temperature rise rate is subtracted by the reference value of the maximum temperature rise rate
The height of thermal runaway safety for mesuring battary monomer described in quantitative assessment；Or
The absolute value of the difference of the length of the first time period reference value is subtracted by the length of the first time period
Size for mesuring battary monomer described in quantitative assessment thermal runaway safety height；Or
The absolute value of the difference of the length of the second time period reference value is subtracted by the length of the second time period
Size for mesuring battary monomer described in quantitative assessment thermal runaway safety height.
In one embodiment, described the step of implementing insulation thermal runaway test to the mesuring battary monomer, includes:
S10 provides mesuring battary monomer；
S20, confirms temperature condition and voltage conditions, and confirmation environmental condition can meet adiabatci condition；
One or more temperature-detecting devices are respectively set in the outer surface of the mesuring battary monomer and inside in S30,
Voltage collecting device is connected at the tab of the mesuring battary monomer；
S40 implements insulation thermal runaway test to the mesuring battary monomer, and records the battery cell during thermal runaway
Battery cell temperature during voltage and thermal runaway.
In one embodiment, the mesuring battary monomer includes in soft-package battery, rectangular cell or cylindrical battery
Any one.
In one embodiment, the mesuring battary monomer is being implemented in insulation thermal runaway test process:
Voltage tester frequency is identical with temperature test frequency, and voltage tester frequency and temperature test frequency are more than or equal to
1Hz。
In one embodiment, one or more temperature are respectively set in the outer surface of the mesuring battary monomer and inside
Detection device, at the tab of the mesuring battary monomer connect voltage collecting device the step of include:
S301 disassembles the mesuring battary monomer segment in stove room or glove box, in order to arrange temperature detection
Device；
S302 provides protective layer, protects to the temperature-detecting device, and the temperature detection after protection is filled
The inside for being arranged in the mesuring battary is set, the temperature after the one or more protections of the inside of mesuring battary arrangement
Detection device；
S303 carries out secondary seal setting to the mesuring battary, and at the tab of the mesuring battary after sealing
One or more groups of voltage collecting devices are set.
A kind of power battery Security Evaluation System, the system comprises:
Adiabatic apparatus, for providing adiabatic condition for mesuring battary monomer；
One or more groups of voltage collecting devices are set at the tab of the mesuring battary monomer shell, for testing
State the voltage of mesuring battary monomer；
One or more temperature-detecting devices are set to the inside or outer surface of the mesuring battary monomer, for testing
The temperature of the mesuring battary monomer；
Control device is electrically connected with the multiple voltage collecting device and the multiple temperature-detecting device, is used for
According to the temperature and voltage of the mesuring battary monomer, insulation thermal runaway test curve is generated, and described to be measured for evaluating
The thermal runaway safety of battery cell.
This application involves the quantitative evaluation methods and system of a kind of power battery thermal runaway safety.The evaluation side of the application
Method includes providing mesuring battary monomer, and implement insulation thermal runaway test to the mesuring battary monomer.It is lost in the adiabatic heat
The temperature and voltage of mesuring battary monomer described in real-time monitoring in control test, generate insulation thermal runaway test curve.From it is described absolutely
In hot thermal runaway test curve, the characteristic value of the mesuring battary monomer is obtained.The characteristic value includes: the mesuring battary list
Second temperature and institute when extensive heat release starts inside the first temperature, mesuring battary monomer when body itself starts heat production
State maximum temperature of mesuring battary monomer during thermal runaway.According to the characteristic value quantitative evaluation mesuring battary list
The thermal runaway safety of body.Therefore, for the mesuring battary monomer of different type or different materials system, unification can be used
One or more groups of characteristic values evaluate its thermal runaway characteristic.Cell safety is described using the characteristic value that unified test method obtains
Property, the safety of battery newly developed easily can also be subjected to across comparison and evaluation with history battery security data.And
This application involves characteristic value it is directly related with single battery thermal runaway internal procedure, can refer to the improvement of battery thermal safety
Specific direction out.
Detailed description of the invention
Fig. 1 is a kind of quantitative evaluation method of the power battery thermal runaway safety provided in the application one embodiment
Flow diagram；
Fig. 2 is a kind of quantitative evaluation method of the power battery thermal runaway safety provided in the application one embodiment
Flow diagram；
Fig. 3 is the step flow diagram of the insulation thermal runaway test provided in the application one embodiment；
Fig. 4 is the step flow diagram of the insulation thermal runaway test provided in the application one embodiment；
Fig. 5 is to be provided in the embodiment of the present application to mesuring battary monomer setting temperature-detecting device and voltage acquisition
The step flow chart of device；
Fig. 6 is the power battery Security Evaluation System schematic diagram provided in the embodiment of the present application.
Description of symbols
Power battery Security Evaluation System 100
Adiabatic apparatus 10
Voltage collecting device 20
Temperature-detecting device 30
Control device 40
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The quantitative evaluation method of the power battery thermal runaway safety of the application is further elaborated.It should be appreciated that retouch herein
The specific embodiment stated is only used to explain the application, is not used to limit the application.
Currently, when carrying out power battery monomer safety evaluatio, mainly for battery cell in mechanical, electrical, hot abuse item
Thermal runaway characteristic under part is tested, including needle pierce, overcharge, heat test etc..However, current security test mainly relates to
And external presentation of the battery cell under heating condition, qualitative comparison of the evaluation index mostly to thermal runaway phenomenon, and and battery
Interior change mechanism is unrelated when thermal runaway, and the comparable index of the test data between different battery cells is seldom.
Based on above-mentioned analysis, it is desirable to provide a kind of battery for different type and material system can use unified one
Group or multiple groups quantitative target are come the method for evaluating its thermal runaway characteristic.And evaluation index and single battery thermal runaway internal procedure are straight
Correlation is connect, can point out specific direction to the improvement of battery thermal safety.For the safe design of power battery of electric motor car
There is important practical value and directive significance with thermal runaway prevention and control.
Referring to Fig. 1, the embodiment of the present application provides a kind of quantitative evaluation method of power battery thermal runaway safety.It is described
The quantitative evaluation method of power battery thermal runaway safety.
S100 provides mesuring battary monomer, and implements insulation thermal runaway test to the mesuring battary monomer.
In this step, the mesuring battary monomer can be appointing in soft-package battery, rectangular cell or cylindrical battery
It anticipates one kind.In the present embodiment battery cell that can be detected can also be the battery cells of other forms, be not limited thereto.
Need to confirm experiment condition and the test of insulation thermal runaway before implementing the mesuring battary monomer insulation thermal runaway test
Whether environment meets the safety test requirement of thermal runaway.The insulation thermal runaway test can be capable of providing the big of adiabatic environment
It is carried out in type calorimeter, needs to ensure that calorimeter has completed calibration and staking-out work before carrying out insulation thermal runaway test, keep away
Exempt to cause danger in test process.In addition, needing through charge and discharge equipment before insulation thermal runaway test carries out by survey
Examination demand adjusts the mesuring battary monomer to specified state-of-charge.
S200, the temperature and voltage of mesuring battary monomer described in real-time monitoring, generate in the insulation thermal runaway test
It is insulated thermal runaway test curve.
In this step, mesuring battary monomer described in temperature-detecting device and voltage collecting device real-time monitoring can be set and exist
Temperature and voltage during thermal runaway.Thermal runaway test curve is insulated according to Test data generation, it can be refering to Fig. 5 institute
Show.Abscissa in Fig. 5 left figure is the time, coordinate time range, that is, testing time range is remembered since data acquisition device
Record data are restored to battery temperature to 100 DEG C of times below.Abscissa in Fig. 5 right figure is rate of temperature change.S300, from institute
It states in insulation thermal runaway test curve, obtains the characteristic value of the mesuring battary monomer.Wherein, the characteristic value includes: described
The first temperature when mesuring battary monomer itself starts heat production, the when extensive heat release starts inside the mesuring battary monomer
The maximum temperature of two temperature and mesuring battary monomer during thermal runaway.
In this step, the characteristic value includes first temperature, the second temperature and the maximum temperature.Certain institute
Stating can also include other characteristic values, the thermal runaway safety for quantitative assessment battery cell to be tested in evaluation method.
S400, according to the thermal runaway safety of the quantitative evaluation mesuring battary monomer of the characteristic value.
It, can the characteristic value for the evaluation of the thermal runaway safety of the mesuring battary monomer in this step
Size, the characteristic value is bigger, and the thermal runaway safety of the mesuring battary monomer is higher or the characteristic value is smaller, institute
The thermal runaway safety for stating mesuring battary monomer is lower.For the evaluation of the thermal runaway safety of the mesuring battary monomer,
Reference battery and reference characteristic value, the relationship of the characteristic value and the reference characteristic value, to determine can be set
State the thermal runaway safety of mesuring battary monomer.In this step, the selection of the reference battery can rule of thumb or root
It is adjusted according to the needs of actual application environment.
The evaluation method of the application includes providing mesuring battary monomer, and implement adiabatic heat mistake to the mesuring battary monomer
Control test.The temperature and voltage of mesuring battary monomer described in real-time monitoring, generate adiabatic heat in the insulation thermal runaway test
Test curve out of control.From the insulation thermal runaway test curve, the characteristic value of the mesuring battary monomer is obtained.The feature
Value includes: the first temperature when the mesuring battary monomer itself starts heat production, puts on a large scale inside the mesuring battary monomer
The maximum temperature of second temperature and mesuring battary monomer during thermal runaway when heat starts.It is fixed according to the characteristic value
The thermal runaway safety of the evaluation mesuring battary monomer of amount.For the battery of different type and material system, system can be used
One one or more groups of quantitative targets evaluate its thermal runaway characteristic.And (that mentions in the application is described for quantitative assessing index
The characteristic value of battery to be tested) it is directly related with single battery thermal runaway internal procedure, the improvement of battery thermal safety can be given
Point out specific direction.
Referring to Fig. 2, in one embodiment, the S400, according to the quantitative evaluation of the characteristic value electricity to be measured
The thermal runaway safety of pond monomer, comprising:
S401 provides corresponding first reference value of normal cell, the second reference value and third reference value, wherein the mark
Temperature when temperature when quasi- battery starts heat production is first reference temperature, the extensive heat release in normal cell inside starts
Degree is second reference temperature, maximum temperature of normal cell during thermal runaway is the third reference temperature.
In this step, a normal cell is set, the normal cell can be to have insulation thermal runaway characteristic test number
According to certain known materials system and design parameter battery.Reference characteristic value is the first reference during the battery thermal runaway
Temperature, the second reference temperature and third reference temperature.
S402, by first temperature, the second temperature and the maximum temperature of the mesuring battary monomer, respectively
It is compared with first reference temperature, second reference temperature and the third reference temperature of the normal cell.
In this step, the movement for implementing comparison to two kinds of temperature values can be realized using controller or computer.
S403, if first temperature is less than first reference temperature, the thermal runaway of the mesuring battary monomer is pacified
Full property is lower than the thermal runaway safety of the normal cell.
Temperature in this step, when indicating that battery cell starts heat production due to first temperature.First temperature is got over
Height, then battery is less susceptible to reach first temperature under abuse conditions.When being not readily reachable by first temperature, battery list
Body heat runaway safe is higher.On the contrary, first temperature is lower, battery cell thermal runaway safety is poorer.
S404, if the second temperature is less than second reference temperature, the thermal runaway of the mesuring battary monomer is pacified
Full property is lower than the thermal runaway safety of the normal cell.
Temperature in this step, when indicating that extensive heat release starts inside battery cell due to the second temperature.It is described
Second temperature is higher, then battery is less susceptible to reach the second temperature under abuse conditions.It is not readily reachable by second temperature
When spending, battery cell thermal runaway safety is higher.On the contrary, the second temperature is lower, battery cell thermal runaway safety is poorer.
S405, if the maximum temperature is less than the third reference temperature, the thermal runaway of the mesuring battary monomer is pacified
Full property is higher than the thermal runaway safety of the normal cell.
In this step, the third reference temperature is maximum temperature of battery cell during thermal runaway.The highest
Temperature is higher, then when thermal runaway occurs for battery, reacts more violent.Therefore the maximum temperature is higher, battery cell thermal runaway peace
Full property is poorer.On the contrary, the maximum temperature is lower, battery cell thermal runaway safety is higher.
In the present embodiment, by the size of the characteristic value, the thermal runaway of the mesuring battary monomer is quantitatively given
The evaluation method of safety.The power battery is evaluated according to first temperature, the second temperature and the maximum temperature
The evaluation result of thermal runaway safety definitely, it is more objective.
In one embodiment, the S400, according to the heat of the quantitative evaluation mesuring battary monomer of the characteristic value
Runaway safe, before further include: according to the insulation thermal runaway test curve, generate the temperature-of the mesuring battary monomer
The change curve of rate of temperature change.The mesuring battary monomer is obtained from the change curve of the temperature-temperature change rate
The maximum temperature rise rate.
The characteristic value includes: the maximum temperature rise rate during the power battery generation thermal runaway to be tested.It is described
Maximum temperature rise rate reference value during thermal runaway occurs for normal cell.
The S400, according to the thermal runaway safety of the quantitative evaluation mesuring battary monomer of the characteristic value, comprising:
S411, the maximum temperature rise rate are less than the reference value of the maximum temperature rise rate, then the mesuring battary heat is lost
Control the highly-safe thermal runaway safety in the normal cell.
In the present embodiment, the maximum temperature rise rate alternatively characteristic value is provided.Pass through the maximum temperature
Raising speed rate evaluates the thermal runaway safety of battery cell.Battery cell maximum temperature rise rate during thermal runaway is got over
Small, the safety of battery cell is higher.
In one embodiment, the S400, according to the heat of the quantitative evaluation mesuring battary monomer of the characteristic value
Runaway safe, before further include:
Obtained from the insulation thermal runaway test curve, from the mesuring battary monomer since heat production to described to be measured
The time that battery cell thermal runaway starts is denoted as the first time period.And
It is obtained from the insulation thermal runaway test curve, to described to be measured since the mesuring battary monomer thermal runaway
The time that battery cell reaches thermal runaway process maximum temperature is denoted as the second time period.
The characteristic value includes: the first time period and the second time period of the battery cell to be tested.Institute
State the first time period reference value and second time period reference value during normal cell generation thermal runaway.
The S400, according to the thermal runaway safety of the quantitative evaluation mesuring battary monomer of the characteristic value, comprising:
S421, the first time period are greater than the first time period reference value, then the mesuring battary thermal runaway safety
Property be higher than the normal cell thermal runaway safety.
S422, the second time period are greater than the second time period reference value, then the mesuring battary thermal runaway safety
Property be higher than the normal cell thermal runaway safety.
In the present embodiment, the first time period and the second time period are provided as other two kinds of characteristic values.
The thermal runaway safety of battery cell is evaluated by the first time period and the second time period.Battery cell is in warm
First time period described in runaway event and the second time period are longer, and battery cell is less susceptible to that thermal runaway occurs, or
Say that the easier prevention before thermal runaway occurs, the thermal runaway safety of battery cell are higher.
In above embodiments, first temperature, the second temperature and the maximum temperature respectively represent described to be measured
Battery cell itself starts the temperature of heat production, the temperature that the mesuring battary monomer thermal runaway starts, the mesuring battary monomer
Maximum temperature during thermal runaway.
In above embodiments, the maximum temperature rise rate is represented when the mesuring battary monomer thermal runaway acutely occurs most
Big temperature rise rate.
In above embodiments, the first time period represent from the mesuring battary monomer since heat production to described to be measured
The time that battery cell thermal runaway starts.The second time period represent from the mesuring battary monomer since heat production to described
Mesuring battary monomer reaches the time of thermal runaway process maximum temperature.
In a specific embodiment by taking above-mentioned six kinds of characteristic values as an example, the heat of mesuring battary monomer described in comprehensive analysis
Runaway safe.Due to battery cell built-in sensors (can be thermocouple) closest to battery material during thermal runaway
True temperature, therefore use the characteristic value of battery built-in sensors measurement temperature data (the first temperature T1, described the
Two temperature T2, the maximum temperature T3, the maximum temperature rise rate dT/dt, the first time period t1 and second time
Section t2) index as battery thermal safety quantitative assessment is relatively reasonable and accurate.
During specifically in summary six kinds of characteristic values are to battery thermal safety quantitative assessment, the S400, according to
The thermal runaway safety of the quantitative evaluation mesuring battary monomer of the characteristic value, further includes passing through one in following steps
The height of the thermal runaway safety of kind or a variety of evaluation mesuring battary monomers:
The size of the absolute value of the difference of first reference temperature is subtracted by first temperature for quantitative assessment
The height of the thermal runaway safety of the mesuring battary monomer；Or
The size of the absolute value of the difference of second reference temperature is subtracted by the second temperature for quantitative assessment
The height of the thermal runaway safety of the mesuring battary monomer；Or
The size of the absolute value of the difference of the maximum temperature is subtracted by the third reference temperature for quantitative assessment
The height of the thermal runaway safety of the mesuring battary monomer；Or
The size of the absolute value of the difference of the maximum temperature rise rate is subtracted by the reference value of the maximum temperature rise rate
The height of thermal runaway safety for mesuring battary monomer described in quantitative assessment；Or
The absolute value of the difference of the length of the first time period reference value is subtracted by the length of the first time period
Size for mesuring battary monomer described in quantitative assessment thermal runaway safety height；Or
The absolute value of the difference of the length of the second time period reference value is subtracted by the length of the second time period
Size for mesuring battary monomer described in quantitative assessment thermal runaway safety height.In the present embodiment, by by six kinds
Characteristic value carries out the height of the thermal runaway safety of the quantitative evaluation mesuring battary monomer.For example, referring to other batteries
Evaluation method can be derived that the battery to be tested can be better than the safety of other one piece of battery (or reference battery), but
It can not learn which thermal runaway characteristic show more preferable in terms of, can not also know that some performance of thermal runaway characteristic is specifically good
It is how many.It in the present embodiment, can specifically learn, such as: from the angle of Self-heating temperature, the mesuring battary is compared to other one
Block battery (or reference battery) has 20 DEG C of promotion.In the present embodiment, the quantitative evaluation method provided can also give battery
Improvement of safety provide direction.For example learnt by the present processes, the Self-heating temperature difference of the mesuring battary,
The Self-heating temperature for improving the battery to be tested can be absorbed in.Specifically improve the Self-heating temperature of the battery to be tested
Method may include looking for new material substitution, being realized by some method for coating or the method for adjusting electrolyte, but also simultaneously
Adjusting method more than being not limited only to.
Please referring to Fig. 5 is temperature, temperature rise rate curve and three characteristic temperature points, the maximum temperature rises that battery is insulated thermal runaway
Rate, characteristic time signal.T1 is first temperature in Fig. 5, i.e. calorimeter detects the mesuring battary monomer and starts to produce
The temperature of heat, i.e., the described mesuring battary monomer from heat production temperature.T1 reflects the mesuring battary monomer original interface and starts
Lose temperature when thermal stability.For now widely used liquid organic electrolyte system, as cathode solid electrolyte
Film starts the temperature decomposed.Calorimeter enters adiabatic operation mode after tl.
T2 is the second temperature in Fig. 5, i.e. T2 is that the mesuring battary monomer temperature rise rate reaches a certain feature temperature rise
Battery temperature when rate.Generally, higher an order of magnitude, i.e., the described mesuring battary monomer are warm than last moment for the temperature rise rate
The temperature of beginning out of control.T3 is the maximum temperature in Fig. 5, and T3 is the mesuring battary monomer during entire thermal runaway
Maximum temperature.
Please refer to the change curve on the right side of Fig. 5 for the mesuring battary monomer temperature-temperature rise rate.It is to be measured described in Fig. 5
For battery cell during thermal runaway, the maximum value of temperature rise rate is denoted as dT/dt.
The first time period, from battery cell since heat production, the time started to battery cell thermal runaway is denoted as t1.
The second time period reaches the time note of thermal runaway process maximum temperature to battery cell since battery cell thermal runaway
For t2.
Specifically, the evaluation method of battery cell thermal runaway be referred to it is following:
T1 is lower, and battery cell is more easy to happen Self-heating, and battery cell safety is poorer.T1 numerical value is that battery is spontaneous
The quantitative assessing index of thermal safety.
T2 is lower, and battery cell easier initiation thermal runaway, battery cell safety after Self-heating is poorer.T2 numerical value is
For the quantitative assessing index of battery thermal runaway safety.
T3 is lower, battery cell after thermal runaway caused by harm it is smaller, heat is less susceptible to pass to the other of periphery
The safety of battery cell or combustible, battery cell is better.T3 numerical value is that the quantitative assessment of battery thermal runaway harmfulness refers to
Mark.
DT/dt is smaller, battery cell after thermal runaway caused by harm it is smaller, heat is less susceptible to pass to its of periphery
The safety of its battery cell or combustible, battery cell is better.DT/dt numerical value is that quantifying for battery thermal runaway harmfulness is commented
Valence index.
T1 is longer, and the time needed for battery cell develops into thermal runaway after Self-heating is longer, and accumulation of heat speed is slow, electricity
The safety of pond monomer is better.
T2 is longer, and the time needed for battery cell reaches thermal runaway maximum temperature after thermal runaway is longer, battery thermal runaway
Heat rate of release is slow afterwards, and the safety of battery cell is better.T1, t2 numerical value are battery thermal runaway thermal accumlation and battery
The quantitative assessing index of heat rate of release after thermal runaway.
In the present embodiment, the characteristic value for the battery to be tested mentioned in above-mentioned quantitative assessing index, that is, the application.This
In embodiment, the characteristic value is measured using battery cell built-in sensors (such as thermocouple), is realized according to the characteristic value
Evaluation to the thermal safety of different battery cells.
According to above-mentioned method, insulation thermal runaway test is implemented to four kinds of different system size battery monomers.Implement exhausted
The results are shown in Table 1 for hot thermal runaway test.The cathode of four kinds of battery systems is graphite, just extremely different types of active material
Material.
Table 1: different system battery cell thermal runaway characteristic values
| Number | Cell 1 | Cell 2 | Cell 3 | Cell 4 |
| Characteristic value/system | LiFePO4/graphite | Cobalt acid lithium/graphite | 111/ graphite of ternary | 532/ graphite of ternary |
| T1(℃) | 158.6 | 116.5 | 85.3 | 87 |
| T2(℃) | 232.1 | 185 | 264.8 | 207.8 |
| T3(℃) | 403.1 | 683.2 | 876.1 | 933.4 |
| dT/dt(℃/min) | 3.3 | 33505.7 | 2900 | 3079.2 |
| t1(h) | 7.2 | 5.3 | 6.3 | 5.4 |
| t2(s) | 95 | 75 | 80 | 67 |
Comparison is as can be seen that the first temperature T1 (Self-heating initial temperature) from table 1: 1 > Cell2 of Cell > Cell
3≈Cell 4.It is said from from heat production temperature, the safety of Cell 1 is better than Cell 2, and Cell 2 is better than Cell 3 and Cell 4.
Further, if evaluation battery thermal runaway is from heat production (using Cell 1 as reference battery), Cell 2 is compared to reference battery warm
Stability has 42.1 DEG C of decline, and Cell 3 reduces by 73.3 DEG C compared to reference battery thermal stability, and Cell 4 compares reference battery
Thermal stability has 71.6 DEG C of decline.
The second temperature T2 (thermal runaway initial temperature): 3 > Cell of Cell, 1 > Cell, 4 > Cell 2.I.e. from heat
Triggering temperature out of control says, thermal runaway safety: 3 > Cell of Cell, 1 > Cell, 4 > Cell 2.Further, if evaluation electricity
The complexity (using Cell 1 as reference battery) of pond thermal runaway triggering, then Cell 2 has compared to reference battery thermal stability
47.1 DEG C of decline, Cell 3 improve 32.7 DEG C compared to reference battery thermal stability, and Cell 4 compares reference battery thermal stability
There is 24.3 DEG C of decline.
The maximum temperature T3 (thermal runaway maximum temperature): 4 > Cell of Cell, 3 > Cell, 2 > Cell 1.I.e. from anti-
From the point of view of answering total heat release i.e. thermal runaway harmfulness, thermal runaway safety: 4 < Cell of Cell, 3 < Cell, 2 < Cell 1.Further
It says, if the harmfulness (using Cell 1 as reference battery) after evaluation battery thermal runaway, Cell 2 are steady compared to reference battery heat
Qualitative to have 280.1 DEG C of decline, Cell 3 reduces by 473 DEG C compared to reference battery thermal stability, and Cell 4 is compared to reference battery warm
Stability has 530.3 DEG C of decline.
2 > Cell of the maximum temperature rise rate dT/dt:Cell, 4 > Cell, 3 > Cell 1.It is from the total heat release of reaction
From the point of view of thermal runaway harmfulness, thermal runaway safety: 2 < Cell of Cell, 4 < Cell, 3 < Cell 1.Further, if it is quantitative
Harmfulness (using Cell 1 as reference battery) after evaluating battery thermal runaway, then Cell 2 compares reference battery heat with Cell 3
Maximum temperature rise rate out of control improves about 1000 times, and Cell 4 is improved about compared to reference battery thermal runaway maximum temperature rise rate
10000 times.
The first time period t1 (time that battery is triggered from heat production to thermal runaway): 1 > Cell of Cell, 3 > Cell 4
≈Cell 2.I.e. from the point of view of thermal accumlation speed, thermal runaway safety: 1 > Cell of Cell, 3 > Cell, 4 ≈ Cell 2.Into
One step is said, if quantitative assessment battery thermal runaway development speed (using Cell 1 as reference battery), Cell 3 is compared with reference to electricity
Pond thermal runaway is advanced by 0.9 hour, and Cell 4 is compared with Cell2 is advanced by about 1.9 hours with reference to thermal runaway.
The second time period t2 (time that battery thermal runaway is triggered to battery thermal runaway maximum temperature): Cell1 >
3 > Cell of Cell, 2 > Cell 4.I.e. after thermal runaway from the point of view of heat rate of release, thermal runaway safety: 1 > Cell of Cell
3 > Cell, 2 > Cell 4.Further, if quantitative assessment battery thermal runaway energy rate of release is (using Cell 1 as reference
Battery), then Cell 3 was compared to energy rate of release fast 15 seconds during reference battery thermal runaway, and Cell 2 is compared to reference battery warm
Fast 20 seconds of energy rate of release in runaway event, Cell 4 compare energy rate of release fast 28 during reference battery thermal runaway
Second.
To sum up, the general safety of a few money batteries are as follows: Cell 1 (LiFePO4/graphite) > Cell 2 (cobalt acid lithium/graphite)
> Cell 3 (111/ graphite of ternary) ≈ Cell 4 (532/ graphite of ternary).Additionally, due to three quantitative assessing index (institutes of battery
State characteristic value) it is directly related with thermal runaway process, the improvement direction of different money batteries: ternary 111 and ternary 532 can also be provided
Material can improve the decomposition temperature of SEI to improve T1, improve safety by the methods of cathode cladding or electrolysis additive
Property；Ternary 532 and cobalt acid lithium material can contact temperature by using the higher diaphragm of thermal stability, raising internal short-circuit or positive and negative anodes
Degree, improves the thermal runaway safety of full battery to further increase T2.T3 is usually directly related with the specific energy of battery, it is more difficult to
It is improved by material modification, it may be considered that reinforce heat dissipation link in the practical application of ternary material battery.
Above by determining for the detailed power battery thermal runaway safety for explaining the application proposition of a specific embodiment
Measure evaluation method.The evaluation method is based on the insulation thermal runaway test that power battery monomer repeats, in conjunction with power electric
The thermal runaway mechanism of pond monomer chooses the characteristic value during thermal runaway to evaluate the thermal runaway safety of power battery monomer.
The characteristic value includes first temperature, the second temperature, the maximum temperature, the maximum temperature rise rate, described
One period and the second time period.The characteristic value can be quantitatively determined by the means of experiment test.It is fixed by comparing
The determining characteristic value of amount realizes the thermal runaway safety evaluatio to power battery monomer.
Referring to Fig. 3, in one embodiment, the step for implementing insulation thermal runaway test to the mesuring battary monomer
Suddenly include:
S10 chooses a mesuring battary monomer from first kind battery cell.
S20, confirms temperature condition and voltage conditions, and confirmation environmental condition is in adiabatci condition.
One or more temperature-detecting devices are respectively set in the outer surface of the mesuring battary monomer and inside in S30,
Voltage collecting device is connected at the tab of the mesuring battary monomer.
S40 implements insulation thermal runaway test to the mesuring battary monomer, and records the battery cell during thermal runaway
Battery cell temperature during voltage and thermal runaway.
In the present embodiment, gives and the specific of insulation thermal runaway test is implemented to a type of mesuring battary monomer
Step.It is understood that the specific steps do not limit, can also realize in other way.
In one embodiment, the mesuring battary monomer is being implemented in insulation thermal runaway test process: voltage tester
Frequency is identical with temperature test frequency, and voltage tester frequency and temperature test frequency are more than or equal to 1Hz.
In the present embodiment, in the insulation thermal runaway test for carrying out battery cell, during needing to record thermal runaway in real time
The temperature of the voltage of battery cell, battery cell.When measuring to battery cell voltage and battery cell temperature, number is acquired
According to frequency should be greater than 1Hz (i.e. data of minimum acquisition per second).And voltage and temperature measurement frequency need to be consistent, with
Guarantee accurately to obtain the characteristic value.
Referring to Fig. 4, in one embodiment, the S30, outer surface and internal difference in the mesuring battary monomer
Multiple temperature-detecting devices are set, at the tab of the mesuring battary monomer connect voltage collecting device the step of include:
S301 disassembles the mesuring battary monomer segment in stove room or glove box, in order to arrange temperature detection
Device.In this step, the temperature-detecting device can be thermocouple.Mesuring battary monomer segment dismantling is understood that
For, when the mesuring battary monomer is soft-package battery, can be opened on the aluminum plastic film of soft-package battery outsourcing an osculum (osculum
Size enough enters thermocouple plug), then enter from osculum thermocouple plug, carries out corresponding fixed operation later,
To complete the laying of the temperature-detecting device.The mesuring battary monomer segment is disassembled it is also understood that be, when it is described to
Survey the battery cell side of being housing battery, along it is described can the top cover of battery cut, carried out after thermocouple plug is entered solid accordingly
Fixed operation (for example being sealed up with glue), to complete the laying of the temperature-detecting device.
S302, provides protective layer, and the protective layer can carry out the temperature-detecting device with diaphragm or other materials
Protection.And by the temperature-detecting device after protection be arranged in the mesuring battary inside (such as can be anode with every
Between film or between cathode and diaphragm).The temperature inspection after one or more protections can be arranged in the inside of the mesuring battary
Survey device.
S303 carries out secondary seal setting to the mesuring battary, and at the tab of the mesuring battary after sealing
One or more groups of voltage collecting devices are set.
In the present embodiment, a temperature-detecting device (temperature-detecting device at least is arranged in the inside of battery cell
It can be (temperature sensor).It needs to disassemble battery portion in stove room or glove box when the temperature sensor is arranged.
Temperature sensor is arranged in the inside of the battery cell after dismantling, and secondary seal is carried out to battery cell.It specifically can be with
The different location inside battery cell and battery cell surface different location arrange multiple temperature sensors as needed.Setting
Multiple temperature sensors are to be able to accurately obtain the temperature of different location of battery cell during thermal runaway
Value.Further, it is possible to use multiple groups voltage sensor measures, to prevent battery cell during thermal runaway due to sensor
Shortage of data caused by falling off is unstable.
Referring to Fig. 6, providing a kind of power battery thermal runaway Security Evaluation System 100 in one embodiment.It is described
System includes: adiabatic apparatus 10, multiple voltage collecting devices 20, multiple temperature-detecting devices 30 and control device 40.
The adiabatic apparatus 10 is used to provide adiabatic condition for mesuring battary monomer.The adiabatic apparatus 10 may include exhausted
Thermal acceleration calorimeter.
The multiple voltage collecting device 20 is set at the tab of the mesuring battary monomer.The multiple voltage acquisition
Device 20 can be voltmeter, for testing the voltage of the mesuring battary monomer.The voltage collecting device 20 in order to prevent
Multiple voltage collecting devices 20 can be arranged in falling off during the test at the tab of the mesuring battary monomer.
The multiple temperature-detecting device 30 is set to the inside of the mesuring battary monomer.The multiple temperature detection dress
Setting 30 can be temperature sensor.Such as thermocouple or thermal resistance.The multiple temperature-detecting device 30 is described for testing
The temperature of mesuring battary monomer.
The control device 40 is electrically connected with the multiple voltage collecting device and the multiple temperature-detecting device.
The control device 40 is used for temperature and voltage according to the mesuring battary monomer, generates insulation thermal runaway test curve.Institute
State the thermal runaway safety that control device is also used to evaluate the mesuring battary monomer.The control device can be computer or
Person based on calculate and control equipment.
The power battery Security Evaluation System 100 provided in the present embodiment includes the adiabatic apparatus 10, described
Multiple voltage collecting devices 20, the multiple temperature-detecting device 30 and the control device 40.The evaluation system 100 can be with
The voltage and temperature of mesuring battary monomer are obtained according to the multiple voltage collecting device 20 and the multiple temperature-detecting device 30
Degree.The insulation thermal runaway test curve is generated by the control device 40.By the control device 40 from the insulation
In thermal runaway test curve, the characteristic value of the mesuring battary monomer is obtained.The available different type of the evaluation system 100
The characteristic value of battery material, according to the thermal runaway safety of the quantitative evaluation mesuring battary monomer of the characteristic value.According to
The application can evaluate its heat for the battery of different type and material system with unified one or more groups of quantitative targets
Characteristic out of control.And quantitative assessing index is directly related with single battery thermal runaway internal procedure, it can be to battery thermal safety
Specific direction is pointed out in improvement.
In addition combined with the technical solution of the application, in the battery design stage, according to the spy of different kinds material battery testing
Value indicative, it is indicated that the higher power battery of safety is made in the improved direction of battery security, guiding material combination.Based on power electric
Pond is insulated thermal runaway test curve and characteristic value to instruct the design of power battery of electric motor car, can be further improved power electric
The efficiency of pond safety Design saves battery research and development cost, has for the safe design and prevention and control of power battery of electric motor car
Important practical value and directive significance.
A kind of computer equipment, including memory and processor, the memory are stored with computer program, the processing
The step of device realizes any of the above-described the method when executing the computer program.Or the computer equipment is for executing
The function of the control device 40.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the computer program can be stored in a non-volatile computer
In read/write memory medium, the computer program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein,
To any reference of memory, storage, database or other media used in each embodiment provided herein,
Including non-volatile and/or volatile memory.Nonvolatile memory may include read-only memory (ROM), programming ROM
(PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include
Random access memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms,
Such as static state RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhancing
Type SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM
(RDRAM), direct memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of quantitative evaluation method of power battery thermal runaway safety characterized by comprising
S100 provides mesuring battary monomer, and implements insulation thermal runaway test to the mesuring battary monomer；
S200, the temperature and voltage of mesuring battary monomer described in real-time monitoring, generate insulation in the insulation thermal runaway test
Thermal runaway test curve；
S300 obtains the characteristic value of the mesuring battary monomer, wherein the spy from the insulation thermal runaway test curve
Value indicative includes: the first temperature when the mesuring battary monomer itself starts heat production, extensive inside the mesuring battary monomer
The maximum temperature of second temperature and mesuring battary monomer during thermal runaway when heat release starts；
S400 quantitatively evaluates the thermal runaway safety of the mesuring battary monomer according to the characteristic value.
2. the quantitative evaluation method of power battery thermal runaway safety as described in claim 1, which is characterized in that
The S400 quantitatively evaluates the thermal runaway safety of the mesuring battary monomer according to the characteristic value, comprising:
There is provided corresponding first reference value of normal cell, the second reference value and third reference value, wherein the normal cell starts
Temperature when temperature when heat production is first reference temperature, extensive heat release starts inside the normal cell is described the
Two reference temperatures, maximum temperature of normal cell during thermal runaway are the third reference temperature；
By first temperature, the second temperature and the maximum temperature of the mesuring battary monomer, respectively with the mark
First reference temperature, second reference temperature and the third reference temperature of quasi- battery compare；
If first temperature is less than first reference temperature, the thermal runaway safety of the mesuring battary monomer is lower than institute
State the thermal runaway safety of normal cell；
If the second temperature is less than second reference temperature, the thermal runaway safety of the mesuring battary monomer is lower than institute
State the thermal runaway safety of normal cell；
If the maximum temperature is less than the third reference temperature, the thermal runaway of the mesuring battary monomer is highly-safe in institute
State the thermal runaway safety of normal cell.
3. the quantitative evaluation method of power battery thermal runaway safety as claimed in claim 2, which is characterized in that
The S400 quantitatively evaluates the thermal runaway safety of the mesuring battary monomer according to the characteristic value, also wraps before
It includes:
According to the insulation thermal runaway test curve, the temperature-temperature change rate curve of the mesuring battary monomer is generated；
The maximum temperature rise rate of the mesuring battary monomer is obtained from the temperature-temperature change rate curve；
The characteristic value includes: the maximum temperature rise rate during the power battery generation thermal runaway to be tested；The standard
Maximum temperature rise rate reference value during thermal runaway occurs for battery；
The S400 quantitatively evaluates the thermal runaway safety of the mesuring battary monomer according to the characteristic value, comprising:
The maximum temperature rise rate is less than the reference value of the maximum temperature rise rate, then the mesuring battary thermal runaway is highly-safe
In the thermal runaway safety of the normal cell.
4. the quantitative evaluation method of power battery thermal runaway safety as claimed in claim 3, which is characterized in that
The S400 quantitatively evaluates the thermal runaway safety of the mesuring battary monomer according to the characteristic value, also wraps before
It includes:
Obtained from the insulation thermal runaway test curve, from the mesuring battary monomer since heat production to the mesuring battary
The time that monomer thermal runaway starts is denoted as the first time period；And
It is obtained from the insulation thermal runaway test curve, to the mesuring battary since the mesuring battary monomer thermal runaway
The time that monomer reaches thermal runaway process maximum temperature is denoted as the second time period；
The characteristic value includes: the first time period and the second time period of the battery cell to be tested；The mark
First time period reference value and second time period reference value during thermal runaway occurs for quasi- battery；
The S400 quantitatively evaluates the thermal runaway safety of the mesuring battary monomer according to the characteristic value, comprising:
The first time period is greater than the first time period reference value, then the mesuring battary thermal runaway is highly-safe in described
The thermal runaway safety of normal cell；
The second time period is greater than the second time period reference value, then the mesuring battary thermal runaway is highly-safe in described
The thermal runaway safety of normal cell.
5. the quantitative evaluation method of power battery thermal runaway safety as claimed in claim 4, which is characterized in that described
S400 further includes passing through following step according to the thermal runaway safety of the quantitative evaluation mesuring battary monomer of the characteristic value
The height of the thermal runaway safety of one of rapid or a variety of evaluations mesuring battary monomer:
The size of the absolute value of the difference of first reference temperature is subtracted by first temperature for described in quantitative assessment
The height of the thermal runaway safety of mesuring battary monomer；Or
The size of the absolute value of the difference of second reference temperature is subtracted by the second temperature for described in quantitative assessment
The height of the thermal runaway safety of mesuring battary monomer；Or
The size of the absolute value of the difference of the maximum temperature is subtracted by the third reference temperature for described in quantitative assessment
The height of the thermal runaway safety of mesuring battary monomer；Or
The size that the absolute value of the difference of the maximum temperature rise rate is subtracted by the reference value of the maximum temperature rise rate is used for
The height of the thermal runaway safety of mesuring battary monomer described in quantitative assessment；Or
The big of the absolute value of the difference of the length of the first time period reference value is subtracted by the length of the first time period
The height of the small thermal runaway safety for mesuring battary monomer described in quantitative assessment；Or
The big of the absolute value of the difference of the length of the second time period reference value is subtracted by the length of the second time period
The height of the small thermal runaway safety for mesuring battary monomer described in quantitative assessment.
6. the quantitative evaluation method of power battery thermal runaway safety as claimed in claim 5, which is characterized in that described to institute
Stating the step of mesuring battary monomer implements insulation thermal runaway test includes:
S10 provides mesuring battary monomer；
S20, confirms temperature condition and voltage conditions, and confirmation environmental condition can meet adiabatci condition；
One or more temperature-detecting devices are respectively set in the outer surface of the mesuring battary monomer and inside, described in S30
Voltage collecting device is connected at the tab of mesuring battary monomer；
S40 implements insulation thermal runaway test to the mesuring battary monomer, and records the battery cell voltage during thermal runaway
With the battery cell temperature during thermal runaway.
7. the quantitative evaluation method of power battery thermal runaway safety as claimed in claim 5, which is characterized in that described to be measured
Battery cell includes any one in soft-package battery, rectangular cell or cylindrical battery.
8. the quantitative evaluation method of power battery thermal runaway safety as claimed in claim 5, which is characterized in that described
Mesuring battary monomer is implemented in insulation thermal runaway test process:
Voltage tester frequency is identical with temperature test frequency, and voltage tester frequency and temperature test frequency are more than or equal to 1Hz.
9. the quantitative evaluation method of power battery thermal runaway safety as claimed in claim 5, which is characterized in that the S30,
Multiple temperature-detecting devices are respectively set in the outer surface of the mesuring battary monomer and inside, in the mesuring battary monomer
The step of connection voltage collecting device, includes: at tab
S301 disassembles the mesuring battary monomer segment in stove room or glove box, in order to arrange temperature-detecting device；
S302 provides protective layer, protects to the temperature-detecting device, and by the temperature-detecting device cloth after protection
Set the temperature detection in the inside of the mesuring battary, after the one or more protections of the inside of mesuring battary arrangement
Device；
S303 carries out secondary seal setting to the mesuring battary, and is arranged at the tab of the mesuring battary after sealing
One or more groups of voltage collecting devices.
10. a kind of power battery Security Evaluation System, which is characterized in that the system comprises:
Adiabatic apparatus, for providing adiabatic condition for mesuring battary monomer；
One or more groups of voltage collecting devices are set at the mesuring battary tab, for testing the mesuring battary monomer
Voltage；
One or more temperature-detecting devices are set to the inside or outer surface of the mesuring battary monomer, described for testing
The temperature of mesuring battary monomer；
Control device is electrically connected with the multiple voltage collecting device and the multiple temperature-detecting device, is used for basis
The temperature and voltage of the mesuring battary monomer generate insulation thermal runaway test curve, and for evaluating the mesuring battary
The thermal runaway safety of monomer.
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| CN114441977A (en) * | 2021-12-31 | 2022-05-06 | 重庆特斯联智慧科技股份有限公司 | Robot battery safety monitoring system and monitoring method |
| CN114441977B (en) * | 2021-12-31 | 2024-04-05 | 重庆特斯联智慧科技股份有限公司 | Robot battery safety monitoring system and monitoring method |
| CN115728662A (en) * | 2022-12-06 | 2023-03-03 | 北汽福田汽车股份有限公司 | Battery fault risk judgment method and device and vehicle |
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