CN106525190B - The device scale method of detection cylinder lithium ion battery gas production - Google Patents
The device scale method of detection cylinder lithium ion battery gas production Download PDFInfo
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- CN106525190B CN106525190B CN201611253978.4A CN201611253978A CN106525190B CN 106525190 B CN106525190 B CN 106525190B CN 201611253978 A CN201611253978 A CN 201611253978A CN 106525190 B CN106525190 B CN 106525190B
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- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
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Abstract
The invention discloses the device and its application method of a kind of detection cylinder lithium ion battery gas production, the technical issues of solution be efficiently, the gas production of accurate detection cylindrical lithium ion battery.A kind of device of detection cylinder lithium ion battery gas production, including pedestal and upper plenum component, pedestal and upper plenum component form closed cavity, cylindrical lithium ion battery is fixed on the base, acupuncture group part is provided at the top of upper plenum component, acupuncture group part is connect by upper plenum component gasket with upper plenum component inner wall；With pumping PP pipe and Seal Oil fluid column PP pipe on upper plenum component side wall, pumping PP pipe and Seal Oil fluid column PP pipe are provided with valve, are evacuated on PP pipe and also have pipe tap, and pipe tap is equipped with rubber plug, Seal Oil fluid column PP pipe is, with oil liquid column, end is the transparent tube of cecum.Detection device pedestal of the present invention and upper plenum component shell wall are stainless steel material, and deflection is small, electrolyte resistance corrosion, reusable, long service life.
Description
Technical field
The invention belongs to technical field of lithium ion, be related to a kind of detection cylinder lithium ion battery gas production device and
Method.
Background technique
Cylindrical lithium ion battery production technology is mature, and high degree of automation, high production efficiency is at low cost, at present by
To very extensive application.With the rapid development of electronics technology, requirement of the people to battery performance is also higher and higher, especially
The raising of lithium ion battery lot stability and consistency, this requires lithium ion battery productions to have stringent process control,
But there are many factor that influence process controls in lithium ion battery production process, the real stringent field control pair of man-machine material method ring
Difficult for most of producer, it is reasonable that this just not only needs to plan in advance, it is also necessary to carry out late detection guidance.Lithium from
The control of sub- cell fabrication processes may strictly not cause side reaction caused by inside lithium ion cell burr, impurity or moisture more,
Cause lithium ion battery gas production big, influences the performance of battery.
Soft bag lithium ionic cell be melted into when gas production can by observation airbag determine produce gas size, can also by using when electricity
Pond hardness determines battery producing gas amount size, but cylindrical lithium ion battery gas production is not easy directly to observe evaluation and test, and people pass through at present
Inside lithium ion cell gas discharge sound size is listened when dissecting lithium ion battery and sprays how much electrolyte determines battery producing gas
It whether normal measures.Dissect battery when, clamp folder open steel shell gap it is not of uniform size, folder open speed it is inconsistent directly affect lithium from
Sub- inside battery gas is discharged sound and how much sprays electrolyte, and dissection battery range estimation battery producing gas amount judgement battery producing gas amount is not
It is accurately not rigorous.
CN 2921823Y discloses a kind of detection device of gas production rate inside lithium ion battery, the device include cavity and
It is respectively equipped with scale on push-pull rod, push-pull rod and cavity side surface, battery core is will test and is put into cavity, when detection battery core generates gas
The baffle that gas push is connected with push-pull rod in the cavity sealed when body moves up and down, thus achieve the purpose that detection gas, but
When detecting lithium ion finished battery, the patent cannot achieve and be connected to inside battery compartment and battery core, only be placed on battery opening
Charge-discharge test battery producing gas in cavity is not suitable for the lithium ion battery gas production that the sealing that sampling observation has been produced is completed.
Summary of the invention
The object of the present invention is to provide the devices and application method of a kind of detection cylinder lithium ion battery gas production, to solve
The technical issues of be efficiently, the gas production of accurate detection cylindrical lithium ion battery.For this purpose, the present invention uses following technical side
Case.
A kind of device of detection cylinder lithium ion battery gas production, including pedestal and upper plenum component, pedestal and upper plenum
Component forms closed cavity, and cylindrical lithium ion battery is fixed on the base, and is provided with acupuncture group part, needle at the top of upper plenum component
Thorn component is connect by upper plenum component gasket with upper plenum component inner wall；
It is managed on upper plenum component side wall with pumping PP pipe and Seal Oil fluid column PP, pumping PP pipe and Seal Oil fluid column PP pipe
It is provided with valve, is evacuated on PP pipe and also has pipe tap, pipe tap is equipped with rubber plug, and Seal Oil fluid column PP pipe is with oil liquid
Column, end are the transparent tube of cecum.
According to the device of the detection cylinder lithium ion battery gas production, the pedestal and upper plenum component pass through spiral shell
Together, gasket is distributed in line connection installation between pedestal and upper plenum component, the also calibration of Seal Oil fluid column PP pipe has scale.
According to the device of the detection cylinder lithium ion battery gas production, the cylindrical lithium ion battery is fixed on bottom
Battery fixing groove on seat installs the battery positioning pin for positioning battery on battery fixing groove sidewall thread hole.
According to the device of the detection cylinder lithium ion battery gas production, the acupuncture group part is through upper plenum group
Steel needle at the top of part, steel needle are structure as a whole with upper plenum component gasket.
A kind of scale method of detection cylinder lithium ion battery gas production device, scale method and step is as follows,
The first step, takes a lithium ion battery same specification battery to be tested, and battery cephalosome is downward, bottom-up to be put into battery
In fixing groove, battery is fixed on by base center position by positioning pin, device pedestal and upper plenum component are tightened into sealing, it is right
Steel needle slowly applies downwards pressure at the top of upper plenum component, and steel needle moves down needle point and pierces through cylindrical lithium ion battery centre bottom shell
Body, then to upward power is applied at the top of steel needle, steel needle is moved up, and returns to origin-location, cylindrical lithium ion battery bottom centre quilt
Perforation, inside battery space is communicated with device cavity space；
Second step opens the switch for being evacuated PP pipe and oil liquid column PP pipe switch, and pumping is until inner space vacuum degree reaches
To -0.09Mpa, demarcating liquid level on the outside of oil liquid column and corresponding to PP pipe position scale is 0mL；
Third step closes pumping PP pipe switch, empty to the 1st injection 1mL inside device by the rubber plug for being evacuated PP tube wall
Gas, oil liquid column corresponding position reference mark be 1mL, the 2nd injection 1mL air, reference mark 2mL ... .. the 100th time infuse
Enter 1mL air, reference mark 100mL, and so on；
Pumping PP pipe switch is opened, is evacuated to device inner space vacuum degree -0.09Mpa, checks oil liquid by the 4th step
Whether outer surface of column is at 0mL calibration, and the calibration of finishing device scale, is otherwise marked again if at 0mL calibration
It is fixed；After completing calibration, pumping PP pipe switch and oil liquid column PP pipe switch are closed, the rubber plug for opening pumping PP tube wall lets out vacuum, twists
Pedestal and upper plenum component are opened, cylindrical lithium ion battery is taken out.
A kind of application method of the device of detection cylinder lithium ion battery gas production, detection cylinder lithium ion battery gas production
Steps are as follows,
The first step, it is downward by cylindrical lithium ion battery head to be measured, bottom-up to be put into caliberating device battery fixing groove
In, cylindrical lithium ion battery is fixed on to the center of pedestal by positioning pin, pedestal and upper plenum component are tightened sealing；
Second step slowly applies downwards pressure to steel needle at the top of upper plenum component, steel needle move down needle point pierce through cylinder lithium from
Sub- battery center bottom shell moves on to origin-location, cylindrical lithium ion electricity then to upward power is applied at the top of steel needle on steel needle
Bottom of pond portion center is perforated, and cylindrical lithium ion battery inner space is communicated with device cavity space, the discharge of inside battery gas, dress
Inside cavity pressure increase is set, oil liquid column is moved to corresponding position, corresponds to scale by reading oil liquid outer surface of column and determines cylinder
Gas production rate inside lithium ion battery.
The present invention has the advantage that and effect.
1. detection device pedestal of the present invention and upper plenum component shell wall are stainless steel material, deflection is small, electrolyte resistance
Corrosion, reusable, long service life.
2. being fixed with battery fixing groove, battery positioning pin on detection device pedestal of the present invention, cylindrical lithium ion battery can
It is positioned in base center position, when steel needle pierces through cylindrical lithium ion battery bottom, steel needle is directed at battery core core, is not easy to pierce electricity
Pond pole piece, detection have a safety feature.
3. detection device pedestal of the present invention bonds lower seal pad, upper plenum component oral area is bonded with and gasket on pedestal
Corresponding lower seal pad, pedestal and upper plenum component tighten rear good leak tightness, and detection accuracy is high, and detection device pedestal battery is fixed
It is provided with felt pad in slot, can prevent battery plus-negative plate from contacting.
4. upper plenum component side wall of the present invention is equipped with the PP pipe of a pumping PP pipe and a Seal Oil fluid column, overhead
Steel needle, PP pipe and the corrosion of steel needle electrolyte resistance are equipped at the top of chamber component, long service life, upper plenum component inner top and steel needle are logical
Cross the sealing of adhesion thickness gasket, it is small that thick gasket with steel needle moves up and down cubic deformation amount itself, and detection accuracy is high.
5. use of the invention carries out vacuumizing calibrated scale with mesuring battary battery of the same type bottom perforated, fashionable dress is demarcated
It is consistent with inner space when test to set inner space, can accurately demarcate the gas production of the size battery.
6. the present invention reaches -0.09Mpa by being evacuated to vacuum degree to device cavity, 0mL scale is demarcated, is avoided
Calibrated error caused by atmospheric pressure is unstable, and vacuum heat transfer is slow, test is influenced small, measuring accuracy height by ambient temperature.
7. detection device of the present invention and detection method solve the problems, such as that cylindrical lithium ion battery produces gas quantitative test, fill out
Rational method of the previous battery production enterprise without sampling observation cylindrical lithium ion battery gas production is mended.
Detailed description of the invention
Fig. 1 is embodiment cylindrical lithium ion battery gas production detection device sectional drawing.
Wherein, 1, pedestal；2, upper plenum component；3, cylindrical lithium ion battery；1-1, battery fixing groove；1-2, battery positioning
Pin；1-3, battery insulation pad；1-4, lower seal pad；1-5, pedestal internal screw thread；2-1, upper plenum component screw thread；2-2, upper sealing
Pad；2-3, steel needle；2-4, upper plenum component gasket；2-5, pumping PP pipe, 2-6, Seal Oil fluid column PP pipe；2-7, pipe tap；
2-8, rubber plug；2-9, PP pipe switch is vacuumized；2-10, oil liquid column；2-11, oil liquid column PP pipe switch；2-12, scale.
Specific embodiment
The present invention uses following technical scheme.
1 introduce detection cylinder lithium ion battery gas production device and application method with reference to the accompanying drawing.
As shown in Figure 1, a kind of device of detection cylinder lithium ion battery gas production is mainly by cup dolly 1 and upper plenum group
Part 2 is constituted.Pedestal 1 and 2 shell of upper plenum component are stainless steel material.It is fixed on pedestal 1 for placing cylindrical steel shell electricity
Battery fixing groove 1-1, battery positioning pin 1-2, the battery insulation in pond pad 1-3, and 1 inner adhesion of pedestal has lower seal pad 1-4.Battery
Positioning pin 1-2 can be using being threadedly coupled, for fixing cylindrical lithium ion battery 3 with battery fixing groove 1-1.On 1 inner wall of pedestal
It is carved with spiral, the corresponding position outer wall of upper plenum component port 2 is carved with screw thread corresponding with pedestal.
The aperture position of upper plenum component 2 is bonded with gasket 2-2, seals for keeping with lower seal pad 1-4.Overhead
The steel needle 2-3 for piercing through steel shell downwards is provided at the top of chamber component 2, steel needle is located at 2 center of upper plenum component, passes through upper plenum
The shell wall of component 2 can move up and down.2 inner top of upper plenum component and steel needle 2-3 are sealed by adhesion thickness gasket.Gasket
It can move up and down, gasket and steel needle 2-3 are integrated mechanism, will not gas leakage.
2 side wall of upper plenum component is equipped with a pumping PP pipe 2-5 and the PP pipe of a Seal Oil fluid column seals oil liquid
Column PP pipe.Pumping PP pipe 2-5 is connected with vacuum pipe, has a pipe tap 2-7 on tube wall and seals the rubber plug 2- in the hole
8.Pumping PP pipe 2-5 and vacuum pipe junction, which are equipped with, vacuumizes PP pipe switch 2-9.The inside of Seal Oil fluid column PP pipe has one small
Section oil liquid, one end is cecum, and the one end connecting with upper plenum component 2 is equipped with oil liquid column PP pipe switch 2-11 and is used for marked gas
The scale 2-12 of amount.
It is described below and how calibrated scale is carried out to transparent sealing oil liquid PP pipe.Detection cylinder lithium ion battery gas production
When, the calibration of gas production scale is carried out first.
The first step, takes a lithium ion battery same specification battery to be tested, and battery cephalosome is downward, bottom-up to be put into pedestal
Battery fixing groove 1-1.Battery is fixed on to the center of pedestal by positioning pin, by the pedestal 1 and upper plenum component 2 of device
It tightens close.Pressure is slowly applied downwards to 2 top steel needle of upper plenum component, steel needle moves down needle point and pierces through in cylindrical lithium ion battery
Heart bottom shell moves to initial position on steel needle then to upward power is applied at the top of steel needle.In cylindrical lithium ion battery bottom
The heart is perforated, and inside battery space is communicated with device cavity space.
Second step opens pumping PP pipe switch and oil liquid column PP pipe switch.The device is evacuated, until the device
Inner space vacuum degree reaches -0.09Mpa, demarcates to oil liquid at this time, and corresponding PP pipe position scale is 0mL.
Third step closes the switch of pumping PP pipe, by being evacuated PP pipe tap rubber plug to the 1st injection 1mL inside device
Air, it is 1mL that liquid level, which corresponds to PP pipe position mark scale, on the outside of oil liquid column, the 2nd injection 1mL air, and reference mark is
2mL ... the 100th injection 1mL air of .., reference mark 100mL.
Pumping PP pipe switch is opened, is evacuated to device inner space vacuum degree -0.09Mpa, checks oil liquid by the 4th step
Whether outer surface of column is at 0mL calibration, and the calibration of finishing device scale, is otherwise marked again if at 0mL calibration
It is fixed.After completing calibration, closing vacuumizes PP pipe switch and oil liquid column PP pipe switch, and the hole rubber plug for opening pumping PP pipe lets out vacuum,
Pedestal and upper plenum component are unscrewed, calibrated scale cylindrical lithium ion battery is taken out.
Then the detection of cylindrical lithium ion battery gas production to be measured is carried out, its step are as follows.
The first step, it is downward by cylindrical lithium ion battery head to be measured, bottom-up to be put into the sealing device demarcated
Face.Cylindrical lithium ion battery is fixed on to the center of pedestal by positioning pin, the device pedestal and upper plenum component are pressed
Hand of spiral tightens sealing.
Second step slowly applies downwards pressure to steel needle at the top of upper plenum component, steel needle move down needle point pierce through cylinder lithium from
Sub- battery center bottom shell, then to upward power is applied at the top of steel needle, steel needle is moved up, and returns to origin-location.Cylinder lithium from
Sub- battery bottom center is perforated, and cylindrical lithium ion battery inner space is communicated with device cavity space, inside battery gas row
Out, device inside cavity pressure increase, oil liquid column are moved to corresponding position, and corresponding to scale by reading oil liquid outer surface of column can
To determine cylindrical lithium ion battery gas production rate inside.
Embodiment
Detection cylinder lithium ion battery gas production device is mainly made of circular pedestal 1 and upper plenum component 2, pedestal 1
Shell wall with upper plenum component 2 is stainless steel material, and battery fixing groove 1-1, battery positioning pin 1-2, electricity are fixed on pedestal 1
Pool insulation pads 1-3, pedestal 1 bonds lower seal pad 1-4, there is internal screw thread on base inner wall, and the opening position outer wall of upper plenum component 2 has
Corresponding external screw thread road.2 open end of upper plenum component is bonded with upper gasket 2-2 corresponding with pedestal lower seal pad 1-4.Overhead
Steel needle 2-3 is provided at the top of chamber component 2, steel needle 2-3 is located at upper plenum component center, passes through upper plenum component shell wall, can
It moves up and down.Upper plenum component inner top and steel needle 2-3 are sealed by upper plenum component gasket 2-4.2 side wall of upper plenum component
One pumping PP pipe 2-5 and a Seal Oil fluid column PP pipe 2-6 are installed.Pumping PP pipe is connected with vacuum pipe.It is evacuated PP
Pipe is equipped with pumping PP pipe switch with vacuum pipe junction.Oil liquid column 2-10 is injected inside Seal Oil fluid column PP pipe 2-6.Seal Oil
Fluid column PP pipe is equipped with oil liquid column PP pipe switch 2-11 and scale 2-12.
Cylindrical lithium ion Sample Cell production to be measured is carried out first, and cylindrical lithium ion Sample Cell to be measured is respectively to inject not
With the 18650-1600mAh-3.2V steel shell cylindrical battery of water content electrolyte, prepare electrolyte water content be respectively 7.5ppm,
28.3ppm, 46.2ppm, not Zhu Ru a group, b group, in three groups of 18650-1600mAh-3.2V battery cores of c group.A group increases by one and is only used as
The test of finished product Sample Cell is made in calibration, other every groups three battery cores.Sample Cell mark respectively a1, a2, a3, a4, b1, b2,
b3、c1、c2、c3。
Then the calibration of gas production scale is carried out.
The first step, take label a4 18650-1600mAh-3.2V Sample Cell calibration, Sample Cell head downward, bottom
It is put into the battery fixing groove of pedestal upward, battery is fixed on to the center of pedestal by battery positioning pin, by device bottom
Seat and upper plenum component tighten sealing by spiral lamination direction, slowly apply pressure downwards to steel needle at the top of upper plenum component.Steel needle
It moves down needle point and pierces through battery sample centre bottom steel shell, then to upward power is applied at the top of steel needle, steel needle is moved up, and is returned to original
Position.Steel shell Sample Cell bottom centre is perforated, and Sample Cell inner space is communicated with device cavity space.
The switch for being evacuated PP pipe and oil liquid column PP pipe switch are opened simultaneously, are vacuumized to it by second step, until should
Device inner space vacuum degree reaches -0.09Mpa, and demarcating liquid level on the outside of oil liquid column and corresponding to PP pipe position scale is 0mL.
Third step closes the switch of pumping PP pipe, empty to the 1st injection 1mL inside device by the rubber plug for being evacuated PP pipe
Gas, it is 1mL that liquid level, which corresponds to PP pipe position mark scale, on the outside of oil liquid column, the 2nd injection 1mL air, and reference mark is
2mL ... the 100th injection 1mL air of .., reference mark 100mL.
Pumping PP pipe is opened, is evacuated to device inner space vacuum degree -0.09Mpa, oil liquid outer surface of column by the 4th step
At 0mL calibration, the calibration of finishing device scale.The switch and oil liquid column PP pipe switch for closing pumping PP pipe, open rubber plug
Vacuum is let out, pedestal and upper plenum component are unscrewed, takes out the 18650-1600mAh-3.2V Sample Cell of label a4.
Gas production detection is finally carried out respectively to several groups of 18650-1600mAh-3.2V Sample Cells, the first step will be to be measured
18650-1600mAh-3.2V Sample Cell head is downward, bottom-up to be put into calibrated device battery fixing groove, passes through
Cylindrical lithium ion battery is fixed on the center of pedestal by battery positioning pin.Device pedestal and upper plenum component are pressed screw thread side
It is sealed to tightening.
Second step slowly applies downwards pressure to steel needle at the top of upper plenum component, steel needle move down needle point pierce through cylinder lithium from
Sub- battery center bottom shell, then to upward power is applied at the top of steel needle, steel needle is moved up, and returns to origin-location, cylinder lithium from
Sub- battery bottom center is perforated, and cylindrical lithium ion battery inner space is communicated with device cavity space, inside battery gas row
Out, oil liquid column is mobile, and it is corresponding gas production that record oil liquid column external solution face, which corresponds to scale value,.
Several groups of 18650-1600mAh-3.2V Sample Cell gas production are shown in Table 1.
1 18650-1600mAh-3.2V Sample Cell gas production of table
Claims (1)
1. a kind of scale method of detection cylinder lithium ion battery gas production device, it is characterised in that: scale method
Steps are as follows,
The first step takes a lithium ion battery same specification battery to be tested, and battery cephalosome downward, fix by the bottom-up battery that is put into
In slot, battery is fixed on by base center position by positioning pin, device pedestal and upper plenum component are tightened into sealing, to overhead
Steel needle slowly applies downwards pressure at the top of chamber component, and steel needle moves down needle point and pierces through cylindrical lithium ion battery centre bottom shell, so
Afterwards to upward power is applied at the top of steel needle, steel needle is moved up, and returns to origin-location, and cylindrical lithium ion battery bottom centre is perforated,
Inside battery space is communicated with device cavity space；
Second step, will be evacuated PP pipe switch and oil liquid column PP pipe switch open, pumping until inner space vacuum degree reach-
0.09Mpa, demarcating liquid level on the outside of oil liquid column and corresponding to PP pipe position scale is 0mL；
Third step, closing pumping PP pipe switch are oily by the rubber plug of pumping PP tube wall to the 1st injection 1mL air inside device
Fluid column corresponding position reference mark be 1mL, the 2nd injection 1mL air, reference mark 2mL ... the 100th injection 1mL of ..
Air, reference mark 100mL, and so on；
Pumping PP pipe switch is opened, is evacuated to device inner space vacuum degree -0.09Mpa, checks outside oil liquid column by the 4th step
Whether surface is at 0mL calibration, and the calibration of finishing device scale, is otherwise re-scaled if at 0mL calibration；It is complete
After calibration, pumping PP pipe switch and oil liquid column PP pipe switch are closed, the rubber plug for opening pumping PP tube wall lets out vacuum, unscrews pedestal
With upper plenum component, cylindrical lithium ion battery is taken out.
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| CN107727460A (en) * | 2017-06-20 | 2018-02-23 | 东莞市创明电池技术有限公司 | Cylindrical battery internal gas collection device |
| CN107452902B (en) * | 2017-08-16 | 2020-06-23 | 中原工学院 | Detachable chargeable lithium ion battery capable of instantly gas production and analysis and arranged on same side of pole column |
| CN109935919B (en) * | 2017-12-19 | 2022-05-17 | 中国科学院物理研究所 | Gas collecting device for battery |
| CN109959868B (en) * | 2017-12-21 | 2021-12-10 | 中南大学 | Novel lithium-oxygen button cell test bottle |
| CN108680437A (en) * | 2018-03-02 | 2018-10-19 | 合肥国轩高科动力能源有限公司 | A kind of power battery aluminum hull pressure expansion mechanics detecting tool |
| CN109186846B (en) * | 2018-09-20 | 2020-10-13 | 南开大学 | Multipurpose battery gas production in-situ detection and analysis device |
| CN109738329A (en) * | 2018-12-29 | 2019-05-10 | 蜂巢能源科技有限公司 | For measuring the measuring device and measurement method of battery core gas production |
| CN110920976A (en) * | 2019-10-28 | 2020-03-27 | 东莞市维萨娜电子科技有限公司 | Circular soft packet of lithium cell U-shaped packaging machine encapsulation combination feeding mechanism |
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