CN110361129A - The experimental provision of in situ measurement inside battery pressure - Google Patents
The experimental provision of in situ measurement inside battery pressure Download PDFInfo
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- CN110361129A CN110361129A CN201910675254.6A CN201910675254A CN110361129A CN 110361129 A CN110361129 A CN 110361129A CN 201910675254 A CN201910675254 A CN 201910675254A CN 110361129 A CN110361129 A CN 110361129A
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- 238000012625 in-situ measurement Methods 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 96
- 238000005086 pumping Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000009413 insulation Methods 0.000 claims description 9
- 238000011065 in-situ storage Methods 0.000 abstract description 5
- 238000002474 experimental method Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 238000001802 infusion Methods 0.000 description 6
- 238000007689 inspection Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
- G01L11/004—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by the use of counterbalancing forces
- G01L11/006—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by the use of counterbalancing forces hydraulic or pneumatic counterbalancing forces
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
Abstract
This application involves a kind of experimental provisions of in situ measurement inside battery pressure.The experimental provision includes the air-tight cabin, the aerating and exhaust device, the trigger device, the detection device and the control device.The experimental provision controls the detection device by the control device and acquires the first pressure values and the second pressure values.It is the airtight chamber pumping or inflation that the control device, which controls the aerating and exhaust device according to first pressure values and second pressure values, so that second pressure values and first pressure values are equal.The experimental provision includes the feedback arrangement of the battery inside and outside differential pressure, the pressure of the air-tight cavity is adjusted in time, so that second pressure values are equal with first pressure values.The inside and outside pressure of the shell of the battery is equal, and deformation occurs for the shell.First pressure values that the experimental provision measures are the internal pressure value of battery state in situ.
Description
Technical field
This application involves battery technology fields, more particularly to a kind of experimental provision of in situ measurement inside battery pressure.
Background technique
Lithium battery has become safely one of the bottleneck problem of lithium battery business application, increasing electric vehicle fire thing
Therefore people are continuously increased to the anxiety of electric car.Therefore, there is an urgent need to improve the security performance of battery.To lithium battery thermal runaway
Pressure change process is furtherd investigate in the process, is disclosed the discouraged establishment process for opening pressure of battery, is helped to manage more deeply
Electrolytic cell thermal runaway process mechanism and the discouraged safety valve of the suitable battery of selection open pressure, improve the security performance of battery.
The method of measurement inside battery pressure by test environmental stress due to being influenced at present, the battery in measurement process
Shell deform, it is difficult to realize and the original position (deformation occurs for shell) of inside battery pressure measured.How to be just able to achieve
The in situ measurement of battery pressure is a problem to be solved.
Summary of the invention
Based on this, it is necessary to aiming at the problem that how to be just able to achieve the in situ measurement of battery pressure, provide a kind of survey in situ
Measure the experimental provision of inside battery pressure.
A kind of experimental provision of in situ measurement inside battery pressure includes air-tight cabin, aerating and exhaust device, trigger device, detection
Device and control device.The air-tight cabin surrounds to form air-tight cavity.The air-tight cavity has electricity for storing battery, the battery
Cell cavity.The aerating and exhaust device is connected to the air-tight cavity.The trigger device is set in the air-tight cavity.The detection dress
It sets and is connected to the battery cavities, for detecting the first pressure values of the battery cavities.The detection device and the air-tight cavity connect
It is logical, for detecting the second pressure values of the air-tight cavity.
The control device is electrically connected with the trigger device.The control device is for controlling the trigger device work
Make, so that thermal runaway occurs for the battery.The control device is electrically connected with the detection device and the aerating and exhaust device respectively
It connects.The control device is used to acquire the first pressure values and the second pressure values by the detection device, and according to described first
It is the airtight chamber pumping or inflation that pressure values and second pressure values, which control the aerating and exhaust device, so that second pressure
Intensity values and first pressure values are equal.
In one embodiment, the air-tight cabin includes cabin and the first support frame.The cabin surrounds to form the gas
Close chamber.First support frame is accommodated in the air-tight cavity, and is fixed on the inner wall of the cabin.The first support frame packet
Containing opposite first surface and second surface.The battery is fixed on the first surface.The trigger device is set to described
Between second surface and the inner wall of the cabin.
In one embodiment, the air-tight cabin further includes thermal insulation board.The thermal insulation board be set to the first surface and
Between the battery.
In one embodiment, the experimental provision further includes the first conduit.One end of first conduit and the electricity
Cell cavity connection.The other end of first conduit with air extractor for being connected to.The air extractor and control device electricity
Connection.The control device, which controls the air extractor, makes first conduit to the battery chamber pumping.The detection device
Including the first pressure detection means.The air inlet of first pressure detection means passes through first conduit and the battery cavities
Connection.First pressure detection means are used to detect first pressure values of the battery cavities.
In one embodiment, the experimental provision further includes the second conduit.One end of second conduit and the gas
Close chamber connection.The detection device further includes the second pressure detection means.The air inlet of second pressure detection means and institute
State the other end connection of the second conduit.Second pressure detection means are used to detect second pressure of the air-tight cavity
Value.
In one embodiment, the detection device further includes the first temperature-detecting device.The first temperature detection dress
It sets and is connected to by first conduit with the battery cavities.First temperature-detecting device is used to detect the of the battery cavities
One temperature.The control device is electrically connected with first temperature-detecting device, for acquiring the first temperature signal.
In one embodiment, the detection device further includes second temperature detection device.The second temperature detection dress
It sets and is connected to by second conduit with the air-tight cavity.The second temperature detection device is used to detect the of the air-tight cavity
Two temperature.The control device is electrically connected with the second temperature detection device, for acquiring second temperature signal.The control
Device is according to first pressure values, second pressure values, first temperature value and the second temperature value, described in drafting
The thermal runaway curve of battery.
In one embodiment, the trigger device is heating device, and the heating device is electrically connected with the control device
It connects, the control device is for controlling the heating device for battery heating, to trigger thermal runaway.
In one embodiment, the trigger device is charging unit, and the charging unit is electrically connected with the control device
It connects, the control device is for controlling the charging unit for battery charging, to trigger thermal runaway.
In one embodiment, the aerating and exhaust device includes air accumulator, the first control valve, the 4th conduit and the second control
Valve.The air accumulator is connected to by third conduit with the air-tight cavity.First control valve is set to the air-tight cavity and institute
State the third conduit between air accumulator.One end of 4th conduit is connected to the air-tight cavity, the 4th conduit
The other end is connected to the air extractor.Second control valve is set to the 4th conduit.
The controller is electrically connected with first control valve and second control valve.The controller is for passing through institute
Stating the first control valve and controlling the air accumulator is that the air-tight cavity is inflated or controls the air-tight cavity by second control valve
It deflates, so that second pressure values and first pressure values are equal.
In one embodiment, the experimental provision further includes the second support frame.Second support frame with it is described airtight
The outer wall in cabin is fixedly connected.
The experimental provision of the in situ measurement inside battery pressure provided by the embodiments of the present application, including air-tight cabin, charge and discharge
Device of air, trigger device and control device.The air-tight cabin surrounds to form air-tight cavity.The air-tight cavity is for storing battery.Institute
Battery is stated with battery cavities.The aerating and exhaust device is connected to the air-tight cavity.The trigger device is set to the air-tight cavity
It is interior.The detection device is connected to the battery cavities, for detecting the first pressure values of the battery cavities.The detection device with
The air-tight cavity connection, for detecting the second pressure values of the air-tight cavity.
The control device is electrically connected with the trigger device, and the control device is for controlling the trigger device work
Make, makes the battery that thermal runaway occur.The control device is electrically connected with the detection device and the aerating and exhaust device respectively,
The control device is used to acquire the first pressure values and the second pressure values by the detection device, and the control device is according to institute
Stating the first pressure values and second pressure values and controlling the aerating and exhaust device is the airtight chamber pumping or inflation, makes described the
Two pressure values are mutually worth with first pressure.Due to the inside and outside pressure equilibrium of the battery, the shell of the battery is in original
Position (deformation occurs for shell) state.The experimental provision of the in situ measurement inside battery pressure is measured by the detection device
First pressure be internal pressure of the battery in situ under state.
Detailed description of the invention
Fig. 1 is the structure of the experimental provision of the in situ measurement inside battery pressure provided in the application one embodiment
Figure；
Fig. 2 is the process of the experimental method of the in situ measurement inside battery pressure provided in the application one embodiment
Figure；
Fig. 3 is the flow chart of the preparation experiment battery provided in the application one embodiment.
Drawing reference numeral:
Experimental provision 10
Battery 100
Battery cavities 101
Air extractor 102
Third control valve 103
Upper end cover 104
Air charging system 105
First conduit 110
Second conduit 120
Second support frame 130
Air-tight cabin 20
Air-tight cavity 201
Cabin 210
First support frame 220
First surface 221
Second surface 222
Thermal insulation board 230
Aerating and exhaust device 30
Air accumulator 310
Third conduit 320
First control valve 330
4th conduit 340
Second control valve 350
Trigger device 40
Detection device 50
First pressure detection means 510
Second pressure detection means 520
First temperature-detecting device 530
Second temperature detection device 540
Control device 60
Specific embodiment
In order to make the above objects, features, and advantages of the present application more apparent, with reference to the accompanying drawing to the application
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this Shen
Please.But the application can be implemented with being much different from other way described herein, those skilled in the art can be not
Similar improvement is done in the case where violating the application intension, therefore the application is not limited by following public specific implementation.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).In the description of the present application, it is to be understood that term " on ", "lower", "front", "rear", " left side ",
The orientation of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside", " clockwise ", " counterclockwise " or position are closed
System indicates to be based on the orientation or positional relationship shown in the drawings, being merely for convenience of description the application and simplifying description
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For the limitation to the application.
In this application unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
Referring to Figure 1, the embodiment of the present application provides a kind of experimental provision 10 of in situ measurement inside battery pressure, including gas
Close cabin 20 fills the embodiment of the present application and provides a kind of experimental provision 10 of in situ measurement inside battery pressure, including air-tight cabin 20, fills
Means of deflation 30, trigger device 40, detection device 50 and control device 60.The encirclement of air-tight cabin 20 forms air-tight cavity 201.Institute
Stating air-tight cavity 201 has battery cavities 101 for storing battery 100, the battery 100.The aerating and exhaust device 30 and the gas
Close chamber 201 is connected to.The trigger device 40 is set in the air-tight cavity 201.The detection device 50 and the battery cavities 101
Connection, for detecting the first pressure values of the battery cavities 101.The detection device 50 is connected to the air-tight cavity 201, is used for
Detect the second pressure values of the air-tight cavity 201.
The control device 60 is electrically connected with the trigger device 40.The control device 60 is for controlling the triggering dress
40 work are set, so that thermal runaway occurs for the battery 100.The control device 60 respectively with the detection device 50 and described fill
Means of deflation 30 is electrically connected.The control device 60 is used to acquire the first pressure values and the second pressure by the detection device 50
Value, and the aerating and exhaust device 30 is controlled according to first pressure values and second pressure values as the air-tight cavity 201 pumping
Gas or inflation, so that second pressure values and first pressure values are equal.
The experimental provision 10 of the in situ measurement inside battery pressure provided by the embodiments of the present application includes the air-tight cabin
20, the aerating and exhaust device 30, the trigger device 40, the detection device 50 and the control device 60.The experiment dress
10 voltage values that the air-tight cavity 201 and the battery cavities 101 are detected by the way that the detection device 50 is arranged are set, and by described
Control device 60 controls the detection device 50 and acquires the first pressure values and the second pressure values.The control device 60 is according to described
First pressure values and second pressure values control the aerating and exhaust device 30 and are the air-tight cavity 201 pumping or inflate, so that
Second pressure values and first pressure values are equal.The experimental provision 10 includes the anti-of 101 inside and outside differential pressure of battery
Structure is presented, the pressure of the air-tight cavity 201 is adjusted in time, so that second pressure values are equal with first pressure values.Institute
The inside and outside pressure for stating the shell of battery 101 is equal, and deformation occurs for the shell.The experimental provision 10 measure described first
Pressure values are the internal pressure value of the battery 100 state in situ.
The shape of the air-tight cabin 20 includes the regular shapes such as cylindrical body, square or cuboid.The air-tight cabin 20
Shape further includes the irregular shapes such as spheroid.The air-tight cabin chamber 201 is sufficient to accommodate the battery 100.The air-tight cabin 20
Material include metal and its alloy etc..
The control device 60 includes control circuit, control module, CPU or other program disks etc..
In one embodiment, the air-tight cabin 20 includes cabin 210 and the first support frame 220.The cabin 210 is surrounded
Form the air-tight cavity 201.First support frame 220 is accommodated in the air-tight cavity 201, and is fixed on the cabin 210
Inner wall.First support frame 220 includes opposite first surface 221 and second surface 222.The battery 100 is fixed on
The first surface 221.The trigger device 40 is set between the second surface 222 and the inner wall of the cabin 210.
In one embodiment, the air-tight cabin 20 further includes thermal insulation board 230.The thermal insulation board 230 is set to described
Between one surface 221 and the battery 100, avoids the battery 100 directly heated, cause local hot stack.
In one embodiment, the experimental provision 10 further includes the first conduit 110.One end of first conduit 110
It is connected to the battery cavities 101.The other end of first conduit 110 with air extractor 102 for being connected to.The air extractor
102 are electrically connected with the control device 60.The control device 60, which controls the air extractor 102, makes first conduit 110
The battery cavities 101 are evacuated.The detection device 50 includes the first pressure detection means 510.The first pressure detection dress
510 air inlet is set to be connected to by first conduit 110 with the battery cavities 101.First pressure detection means 510 are used
In first pressure values for detecting the battery cavities 101.
First conduit 110 is connect with the housing seal of the battery 100, and is connected to the battery cavities 101 smooth.
The air extractor 102 is vacuum evacuation device.In one embodiment, the air extractor 102 is vacuum pump.
First pressure detection means 510 include pressure gauge, pressure gauge or pressure-detecting device etc..
In one embodiment, first pressure detection means 510 include pressure sensor and pressure transmitter device.Institute
It states pressure sensor to contact with the gas in the battery cavities 101, pressure signal is converted into electric pressure signal.The pressure becomes
It send device to amplify and be filtered the electric pressure signal, forms the first pressure value signal.The pressure inverting
The first pressure value signal is transferred to the control device again by device.
In one embodiment, the experimental provision 10 further includes the second conduit 120.One end of second conduit 120
It is connected to the air-tight cavity 201.The detection device 50 further includes the second pressure detection means 520.The second pressure detection
The air inlet of device 520 is connected to the other end of second conduit 120.Second pressure detection means 520 are for detecting
Second pressure values of the air-tight cavity 201.
Second conduit 120 is tightly connected with the cavity 210, and is connected to the air-tight cavity 201 smooth.
First pressure detection means 510 can be identical with the type of second pressure detection means 520, can also be with
It is different.In one embodiment, the type phase of first temperature-detecting device 530 and the second temperature detection device 540
Together, guarantee that measurement error is identical, improve detection accuracy.
In one embodiment, the detection device 50 further includes the first temperature-detecting device 530.The first temperature inspection
Device 530 is surveyed to be connected to by first conduit 110 with the battery cavities 101.First temperature-detecting device 530 is for examining
Survey the first temperature of the battery cavities 101.The control device 60 is electrically connected with first temperature-detecting device 530, is used for
Acquire the first temperature signal.
First temperature-detecting device 530 includes thermometer, thermometer or temperature sensor and temperature pick-up device.
In one embodiment, the detection device 50 further includes second temperature detection device 540.The second temperature inspection
Device 540 is surveyed to be connected to by second conduit 120 with the air-tight cavity 201.The second temperature detection device 540 is for examining
Survey the second temperature of the air-tight cavity 201.The control device 60 is electrically connected with the second temperature detection device 540, is used for
Acquire second temperature signal.The control device 60 is according to first pressure values, second pressure values, first temperature
Value and the second temperature value, draw the thermal runaway curve of the battery 100.
First temperature-detecting device 530 and the second temperature detection device 540 include thermometer, thermometer or temperature
Spend sensor and temperature pick-up device.The type of first temperature-detecting device 530 and the second temperature detection device 540
It may be the same or different.
In one embodiment, the type of first temperature-detecting device 530 and the second temperature detection device 540
It is identical, guarantee that measurement error is identical, improves detection accuracy.
In one embodiment, the trigger device 40 is heating device, the heating device and the control device 60
Electrical connection, the control device 60 is for controlling the heating device for the battery 100 heating, to trigger thermal runaway.
In one embodiment, the trigger device 40 is charging unit, the charging unit and the control device 60
Electrical connection, the control device 60 is for controlling the charging unit for the battery 100 charging, to trigger thermal runaway.
In one embodiment, the aerating and exhaust device 30 includes air accumulator 310, the first control valve 330, the 4th conduit
340 and second control valve 350.The air accumulator 310 is connected to by third conduit 320 with the air-tight cavity 201.First control
Valve 330 processed is set to the third conduit 320 between the air-tight cavity 201 and the air accumulator 310.4th conduit
340 one end is connected to the air-tight cavity 201, and the other end of the 4th conduit 340 is connected to the air extractor 102.Institute
It states the second control valve 350 and is set to the 4th conduit 340.
The control device 60 is electrically connected with first control valve 330 and second control valve 350.The control dress
60 are set for the air accumulator 310 being controlled and being the air-tight cavity 201 inflation or pass through described the by first control valve 330
Two control valves 350 control the air-tight cavity 201 and deflate, so that second pressure values and first pressure values are equal.
When original state, first control valve 330 is closed, and the third conduit 320 is not turned on.Second control valve
350 close, and the 4th conduit 340 is not turned on.When second pressure values are greater than first pressure values, the control dress
It sets 60 controls, second control valve 350 to open, the 4th conduit 340 conducting.201 pressure release of air-tight cavity.When described
When two pressure values are less than first pressure values, first control valve 330 is opened, and the third conduit 320 is connected.The storage
Gas tank 310 is the air-tight cavity 201 inflation.
In one embodiment, the experimental provision 10 further includes air charging system 105.The air charging system 105 with it is described
The inner cavity of air accumulator 310 is connected to.The air charging system 105 is electrically connected with the control device 60.When in the air accumulator 310
When pressure is less than setting value, the control device 60 controls the air charging system 105 as the air accumulator 310 inflation.
The air charging system 105 can be air compressor machine, blower or compressor etc..
In one embodiment, the experimental provision 10 further includes the second support frame 130.Second support frame 130 with
The outer wall of the air-tight cabin 20 is fixedly connected.The air-tight cavity 20 is isolated in second support frame 130, reduces external action.
In one embodiment, the experimental provision 10 further includes air charging system 105.The air charging system 105 with it is described
The inner cavity of air accumulator 310 is connected to.The air charging system 105 is electrically connected with the control device 60.When in the air accumulator 310
When pressure is less than setting value, the control device 60 controls the air charging system 105 as the air accumulator 310 inflation.
Please also refer to Fig. 2, the embodiment of the present application provides a kind of experimental method of in situ measurement inside battery pressure, packet
It includes:
Battery 100 is set to air-tight cabin 20 and surrounds the air-tight cavity 201 formed by S100, and the battery 100 has battery cavities
101。
S200, it is that the battery 100 heats or charges that control device 60, which controls trigger device 40, to trigger the battery
100 thermal runaways.
S300, the control device 60 control the first pressure that detection device 50 acquires the battery cavities 101 in setting time
Second pressure values of intensity values and the air-tight cavity 201.
S400, the control device 60 control aerating and exhaust device 30 according to first pressure values and second pressure values
It is inflated for deflated for the air-tight cavity 201, make the second pressure values of the air-tight cavity 201 and the first pressure of the battery cavities 101
Intensity values are equal.
The experimental method of the in situ measurement inside battery pressure provided by the present application is controlled by control device 60 and is triggered
Device 40 is that the battery 100 heats or charges, to trigger 100 thermal runaway of battery.The control device 40 controls described
Detection device 50 acquires the first pressure values of the battery cavities 101 and the second pressure values of the air-tight cavity 201 in setting time.
The control device 60 is the air-tight cavity according to first pressure values and second pressure values control aerating and exhaust device 30
201 is inflated for deflated, makes second pressure values of the air-tight cavity 201 and first pressure values of the battery cavities 101
It is equal.The experimental method of the in situ measurement inside battery pressure by establishing the feedback procedure of 101 inside and outside differential pressure of battery,
The pressure of the air-tight cavity 201 is adjusted in time, so that second pressure values are equal with first pressure values.The battery
The inside and outside pressure of 101 shell is equal, and deformation occurs for the shell.First pressure values that the experimental provision 10 measures
The internal pressure value of the as described battery 100 state in situ.
In one embodiment, after the S400, the experimental method further include:
S500, after thermal runaway occurs for the battery 100, the control device 60 controls the trigger device 40 and closes.
The control device 60 continuously records multiple first pressure values, multiple second pressure values, multiple first temperature
Value and multiple second temperature values.
S600, the control device 60 is according to multiple first pressure values, multiple second pressure values, multiple described
First temperature value and multiple second temperature values, draw the thermal runaway curve of the battery 100.
The transformed of the battery cavities 101 internal pressure during thermal runaway occurs for the thermal runaway curve record
Journey.
In one embodiment, before the S100, the experimental method further include:
The battery 100 is tested in S010, preparation.
Please also refer to Fig. 3, in one embodiment, the S010 includes:
S011 installs the first conduit 110 being connected to the battery cavities 101 in the upper end cover 104 of primary battery.
S012 carries out fluid infusion to the battery cavities 101 by first conduit 110.
S013 vacuumizes the battery cavities 101 by first conduit 110.
S014 carries out capacitance test to the battery 100.
S015 makes the battery 100 charge to predetermined state-of-charge if test passes.
The judgment criteria of the test passes described in the S015 are as follows: if the capacitance of the battery 100 and the former electricity
The capacitance in pond is equal, then the battery 100 is qualified.
In one embodiment, after the S013, further includes:
The battery 100 is melted by S01, and repeats the S012 and S013.
First conduit 110 is installed in the upper end cover 104 of the primary battery.First conduit 110 has good
Good air-tightness, high voltage performance (being not less than 1Mpa) and performance resistant to high temperature (being not less than 800 DEG C).First conduit is installed
After 110, the battery cavities 101 are vacuumized by first conduit 110.Because being open and changing in the upper end cover 104
It being discharged together at will cause the 100 electrolyte inside volatilization gas of battery in preceding vacuum, causing electrolyte molten
Agent is reduced.Therefore, solvent fluid infusion is carried out to the battery 100 before exhausting vacuum, the battery 100 is taken out very after fluid infusion
It is empty.
The purpose vacuumized is to arrange the air entered inside the battery cavities 101 by 104 aperture of upper end cover completely
Out.The battery 100 is melted into 48 hours under the conditions of 25 DEG C, ambient atmosphere pressure by completion after vacuumizing in constant temperature.It
It to 100 fluid infusion of battery and vacuumizes again afterwards.Then volume test is done to the battery 100.If 100 capacity of battery
In normal condition, the battery 100 is charged to the experiment tested scheduled state-of-charge and start next step.If the electricity
100 volume test of pond finds that 100 capacity of battery is abnormal, illustrates that the battery 100 installs first conduit 110 in aperture
During, there is abnormal operation.The battery 100 cannot be used for testing, and needs replacing primary battery and prepares reality again
Test the battery 100.
Capacitance test process can carry out after each fluid infusion vacuumizes, can also be repeatedly after fluid infusion evacuation cycle
It carries out.
In one embodiment, one end of first conduit 110 set air extractor 102 described in air extractor 102. with
The control device 60 is electrically connected.It is that the battery 100 vacuumizes that the control device 60, which controls the air extractor 102,.
In one embodiment, the detection device 50 further includes the first pressure detection means 510, the first pressure inspection
Device 510 is surveyed to be connected to the battery cavities 101 by first conduit 110, first pressure detection means 510 with it is described
Control device 60 is electrically connected, after the S010, the experimental method further include:
S020, the control device 60 control first pressure detection means 510 and are detected by first conduit 110
First pressure values of the battery cavities 101, and store first pressure values.
In one embodiment, the experimental provision 10 further includes third solenoid valve 103.The third solenoid valve 103 is set
It is placed between first conduit 110 and the air extractor 102.The third solenoid valve 103 and 60 electricity of control device
Connection.The on-off that the control device 60 controls the third solenoid valve 103 realizes that the battery cavities 101 take out inflation.
In one embodiment, the air-tight cabin 20 installs the second conduit 120, and the detection device 50 further includes the second pressure
Strong detection device 520, second pressure detection means 520 are connected to by second conduit 120 with the air-tight cavity 201,
Second pressure detection means 520 are electrically connected with the control device 60, and after the S020, the experimental method is also wrapped
It includes:
S030, the control device 60 control second pressure detection means 520 and are detected by second conduit 120
Second pressure values of the air-tight cavity 201, and store second pressure values.
In one embodiment, the detection device 50 further includes the first temperature-detecting device 530, the first temperature inspection
Device 530 is surveyed to be connected to the battery cavities 101 by first conduit 110, first temperature-detecting device 530 with it is described
Control device 60 is electrically connected, after S300, further includes:
S310, the control device 60 control the first temperature that the first temperature-detecting device 530 acquires the battery cavities 101
Value, and store first temperature value.
In one embodiment, the detection device 50 further includes second temperature detection device 540, the second temperature inspection
Device 540 is surveyed to be connected to the air-tight cavity 201 by second conduit 120, the second temperature detection device 540 with it is described
Control device 60 is electrically connected, after the S310, further includes:
S320, the control device 60 controls second temperature detection device 540 and acquires the second temperature value of the chamber, and stores up
Deposit the second temperature value.
In one embodiment, the air-tight cabin 20 includes cabin 210 and the first support frame 220, first support frame
220 are accommodated in the air-tight cavity 201, and are fixed on the inner wall of the cabin 210, and first support frame 220 includes opposite
First surface 221 and second surface 222, the step of battery 100 is accommodated in air-tight cavity 201 in the S100 packet
It includes:
The battery 100 is fixed on the first surface 221 by S110.
In one embodiment, after the S110, further includes:
The trigger device 40 is set between the second surface 222 and the inner wall of the cabin 210 by S120, is used
In for the battery 100 heat or charge.
In one embodiment, after the S120, further includes:
S130 adjusts second pressure of the air-tight cavity 201, makes second pressure and the first pressure phase
Deng.
In one embodiment, the aerating and exhaust device 30 includes air accumulator 310, the first control valve 330, the 4th conduit
340 and second control valve 350.The air accumulator 310 is connected to by third conduit 320 with the air-tight cavity 201.First control
Valve 330 processed is set to the third conduit 320 between the air-tight cavity 201 and the air accumulator 310.4th conduit
340 one end is connected to the air-tight cavity 201, and the other end of the 4th conduit 340 is connected to the air extractor 102.Institute
It states the second control valve 350 and is set to the 4th conduit 340.
The control device 60 is electrically connected with first control valve 330 and second control valve 350.The control dress
60 are set for the air accumulator 310 being controlled and being the air-tight cavity 201 inflation or pass through described the by first control valve 330
Two control valves 350 control the air-tight cavity 201 and deflate, so that second pressure values and first pressure values are equal.
When original state, first control valve 330 is closed, and the third conduit 320 is not turned on.Second control valve
350 close, and the 4th conduit 340 is not turned on.When second pressure values are greater than first pressure values, the control dress
It sets 60 controls, second control valve 350 to open, the 4th conduit 340 conducting.201 pressure release of air-tight cavity.When described
When two pressure values are less than first pressure values, first control valve 330 is opened, and the third conduit 320 is connected.The storage
Gas tank 310 is the air-tight cavity 201 inflation.
In one embodiment, the air-tight cabin 20 further includes thermal insulation board 230, and the S110 includes:
The thermal insulation board 230 is set to the first surface 221 by S111.
The battery 100 is set to surface of the thermal insulation board 230 far from first support frame 220 by S112.
In one embodiment, the trigger device 40 be heating device, the S200 be the heating device with it is described
Control device 60 is electrically connected, and the control device 60 controls the heating device for the battery 100 heating, to trigger the electricity
100 thermal runaway of pond.
In one embodiment, the trigger device 40 be charging unit, the S200 be the charging unit with it is described
Control device 60 is electrically connected, and the control device 60 controls the charging unit for the battery 100 charging, to trigger the electricity
100 thermal runaway of pond.
In one embodiment, the experimental provision 10 further includes air charging system 105.The air charging system 105 with it is described
The inner cavity of air accumulator 310 is connected to.The air charging system 105 is electrically connected with the control device 60.When in the air accumulator 310
When pressure is less than setting value, the control device 60 controls the air charging system 105 as the air accumulator 310 inflation.
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, but it cannot be understood as to this Shen
Please the scope of the patents limitation.It should be pointed out that for those of ordinary skill in the art, not departing from the application design
Under the premise of, various modifications and improvements can be made, these belong to the protection scope of the application.Therefore, the application patent
The scope of protection shall be subject to the appended claims.
Claims (11)
1. a kind of experimental provision of in situ measurement inside battery pressure characterized by comprising
Air-tight cabin (20), encirclement are formed air-tight cavity (201), and the air-tight cavity (201) is for storing battery (100), the battery
(100) there are battery cavities (101)；
Aerating and exhaust device (30) is connected to the air-tight cavity (201)；
Trigger device (40) is set in the air-tight cavity (201)；
Detection device (50) is connected to the battery cavities (101), for detecting the first pressure values of the battery cavities (101), institute
It states detection device (50) to be connected to the air-tight cavity (201), for detecting the second pressure values of the air-tight cavity (201)；
Control device (60) is electrically connected with the trigger device (40), and the control device (60) is for controlling the triggering dress
Set (40) work so that the battery (100) occur thermal runaway, the control device (60) respectively with the detection device (50)
It is electrically connected with the aerating and exhaust device (30), the control device (60) is used for through the first pressure of the detection device (50) acquisition
Intensity values and the second pressure values, and control the aerating and exhaust device (30) according to first pressure values and second pressure values and be
Air-tight cavity (201) pumping or inflation, so that second pressure values are equal with first pressure values.
2. the experimental provision of in situ measurement inside battery pressure as described in claim 1, which is characterized in that the air-tight cabin
(20) include:
Cabin (210), encirclement form the air-tight cavity (201)；
First support frame (220) is accommodated in the air-tight cavity (201), and is fixed on the inner wall of the cabin (210), described
First support frame (220) includes opposite first surface (221) and second surface (222), and the battery (100) is fixed on described
First surface (221), the trigger device (40) be set to the second surface (222) and the cabin (210) inner wall it
Between.
3. the experimental provision of in situ measurement inside battery pressure as claimed in claim 2, which is characterized in that the air-tight cabin
(20) further include:
Thermal insulation board (230) is set between the first surface (221) and the battery (100).
4. the experimental provision of in situ measurement inside battery pressure as described in claim 1, which is characterized in that further include:
One end of first conduit (110), first conduit (110) is connected to the battery cavities (101), first conduit
(110) for being connected to air extractor (102), the air extractor (102) is electrically connected the other end with the control device (60)
It connects, the control device (60), which controls the air extractor (102), makes first conduit (110) to the battery cavities (101)
Pumping, the detection device (50) include the first pressure detection means (510), first pressure detection means (510) into
Port is connected to by first conduit (110) with the battery cavities (101), and first pressure detection means (510) are used for
Detect first pressure values of the battery cavities (101).
5. the experimental provision of in situ measurement inside battery pressure as claimed in claim 4, which is characterized in that further include:
One end of second conduit (120), second conduit (120) is connected to the air-tight cavity (201), the detection device
It (50) further include the second pressure detection means (520), the air inlet of second pressure detection means (520) is led with described second
The other end connection of (120) is managed, second pressure detection means (520) are used to detect described the of the air-tight cavity (201)
Two pressure values.
6. the experimental provision of in situ measurement inside battery pressure as claimed in claim 5, which is characterized in that the detection device
(50) further include:
First temperature-detecting device (530), first temperature-detecting device (530) pass through first conduit (110) and institute
Battery cavities (101) connection is stated, first temperature-detecting device (530) is used to detect the first temperature of the battery cavities (101),
The control device (60) is electrically connected with first temperature-detecting device (530), for acquiring the first temperature signal.
7. the experimental provision of in situ measurement inside battery pressure as claimed in claim 5, which is characterized in that the detection device
(50) further include:
Second temperature detection device (540), the second temperature detection device (540) pass through second conduit (120) and institute
Air-tight cavity (201) connection is stated, the second temperature detection device (540) is used to detect the second temperature of the air-tight cavity (201),
The control device (60) is electrically connected with the second temperature detection device (540), for acquiring second temperature signal, the control
Device (60) processed is drawn according to first pressure values, second pressure values, first temperature value and the second temperature value
Make the thermal runaway curve of the battery (100).
8. the experimental provision of in situ measurement inside battery pressure as claimed in claim 5, which is characterized in that the trigger device
It (40) is heating device, the heating device is electrically connected with the control device (60), and the control device (60) is for controlling
The heating device is the battery (100) heating, to trigger thermal runaway.
9. the experimental provision of in situ measurement inside battery pressure as claimed in claim 5, which is characterized in that the trigger device
It (40) is charging unit, the charging unit is electrically connected with the control device (60), and the control device (60) is for controlling
The charging unit is the battery (100) charging, to trigger thermal runaway.
10. the experimental provision of in situ measurement inside battery pressure as claimed in claim 5, which is characterized in that the inflation/deflation
Device (30) includes:
Air accumulator (310), the air accumulator (310) are connected to by third conduit (320) with the air-tight cavity (201)；
First control valve (330), the third conduit being set between the air-tight cavity (201) and the air accumulator (310)
(320)；
One end of 4th conduit (340), the 4th conduit (340) is connected to the air-tight cavity (201), the 4th conduit
(340) the other end is connected to the air extractor (102)；
Second control valve (350) is set to the 4th conduit (340)；
The control device (60) is electrically connected with first control valve (330) and second control valve (350), the control
Device (60) be used to control by first control valve (330) air accumulator (310) be the air-tight cavity (201) inflate or
It controls the air-tight cavity (201) by second control valve (350) to deflate, so that second pressure values and first pressure
Intensity values are equal.
11. the experimental provision of in situ measurement inside battery pressure as claimed in claim 5, which is characterized in that further include:
Second support frame (130) is fixedly connected with the outer wall of the air-tight cabin (20).
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| CN110361129B (en) | 2024-04-19 |
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