CN209280231U - A kind of equipment for detecting battery system box sealing performance - Google Patents
A kind of equipment for detecting battery system box sealing performance Download PDFInfo
- Publication number
- CN209280231U CN209280231U CN201822139534.9U CN201822139534U CN209280231U CN 209280231 U CN209280231 U CN 209280231U CN 201822139534 U CN201822139534 U CN 201822139534U CN 209280231 U CN209280231 U CN 209280231U
- Authority
- CN
- China
- Prior art keywords
- battery system
- vacuum tank
- leak
- helium
- equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
The utility model discloses a kind of equipment for detecting battery system box sealing performance.The equipment includes: vacuum tank, helium mass spectrometer leak detector, two groups of pumping pump groups, helium gas sources；Battery system cabinet is placed in vacuum tank when detection；Helium mass spectrometer leak detector passes through leak detection piping connection vacuum tank；One group in two groups of pumping pump groups connects vacuum tank by exhaust pipe, and another group connects battery system cabinet by exhaust pipe；Battery system cabinet passes through the helium gas source outside loading line connection；Battery system cabinet passes through vent valve with vacuum tank respectively and connects atmosphere with exhaust-valve；It is respectively equipped with pressure sensor outside vacuum tank and battery system cabinet, which is separately connected PLC control unit；Vacuum tank is by circuit connector standards leak hole, and the referance leak is for calibrating equipment；Solenoid valve is respectively equipped on each pipeline, each solenoid valve is controlled by PLC.The sealing performance of battery system cabinet can be detected safe and efficiently using the equipment, measuring accuracy is high.
Description
Technical field
The utility model relates to a kind of equipment for detecting battery system box sealing performance, are mainly used for new energy vapour
The sealing propertytest or test of vehicle vehicle mounted dynamic battery packet or system cabinet.
Background technique
Currently, in new-energy automobile industry, the sealing grade of vehicle mounted dynamic battery system at least need to meet IP67 and with
Upper degree of protection does not allow any dust to enter wherein " 6 " to represent dirt close；" 7 " represent short time robust water immersion performance, that is, meet
30min immersion ne-leakage.
Currently, battery manufacturer primary concern is in vehicle operation, the rainy day or has under the deeper surface conditions of ponding, liquid
Water can enter inside battery pack, and then induce the security risks such as electric leakage；Either worry that steam enters inside battery system case
Battery core inside, cause electrolyte modified, and then influence battery performance.Therefore, battery system box body tightness is wanted substantially
Seeking Truth: water cannot enter in battery system cabinet.
For new energy car battery system cabinet sealing propertytest, common method include bowssening, pressure-decay method,
Ultrasonic leak detection method, air pressure difference method, spray helium method, vacuum helium cover method and suction gun method etc..The characteristics of these methods, is as follows:
(1) bowssening is a kind of side that battery system cabinet is hung in test sample leakproofness in water tank by hoisting mechanism
Method.This method is to be immersed in whether battery system cabinet in water tank has bubble generation by eye-observation, and this method precision is not
Height, can not rational judgment, and battery system is immersed in the danger that short-circuit, on fire explosion is had in water.
(2) pressure-decay method due to using hydrogen nitrogen mixture as search gas, the Hydrogen Brittleness Phenomena of sample easy to form, and
The use of hydrogen has security risk.
(3) ultrasonic leak detection method does not allow the leak source and hole of easy-to-search complex part, is also not suitable for searching assembled workpiece
Leak source and hole.
(4) air pressure difference method is mainly combined using air leakage detector and pump group, by by the air pump of certain pressure
Enter into battery system cabinet, the pressure value that record leak detector detects re-records inspection after observation a period of time (such as 30min)
The pressure value that leakage instrument is read shows that sample has leakage, otherwise sample No leakage if front and back pressure value changes.The party
Method utilizes the variation of air pressure difference and pressure, due to influence of the temperature vulnerable to illumination and heat source of air, measurement accuracy
It is not high.
(5) spray helium method be helium is sprayed onto the surface of battery system sample using spray gun, then by with battery system sample
The helium molecular amounts inside leak detector reading that inside is connected, obtain leakage rate by the conversion mechanism inside leak detector.By
In spraying helium in atmospheric environment, and sample interior has helium background with the presence of air, for the higher battery system of sealing requirements
Cabinet of uniting is sprayed on external helium and is not easily accessible in sample, therefore the accuracy detected is not high since external and internal pressure is equal.
(6) vacuum helium cover method is put into sample in the helium cover full of helium, and helium cover is soft material under normal circumstances, can
To test out whole leak rate, but it can not determine the position of leak source.
(7) suction gun method is a kind of common method, and cardinal principle is the helium that pressurization is filled in sample.If
There are leakage point in measurand, the helium inside measurand will leak outflow along leakage point, utilize connection at this time
Suction gun on helium mass spectrometer leak detector is close to the seam crossing of measurand, and if there is the position of leakage, the nitrogen that overflow goes out will
It is sucked by suction gun pipe, the helium of this part will be accurately detected by leak detector, and measure the leakage rate data of leak position.
Suction gun method is a kind of detection method for being rapidly used for cabinet class container, can accurately find cabinet leakage point using suction gun pipe
Position.But due to needing to judge from whole angle the leakiness of battery system cabinet, need to know battery system cabinet
Whole leakage rate, and suction gun method can not obtain whole leakage rate from whole angle.In addition, searching battery system case with suction gun method
When the leakage point of body, the probe of suction gun pipe is easy to be influenced by gases other in environment and cause accuracy in detection not high.Cause
This suction gun method has certain limitation in battery system sealing performance context of detection.
102353504 A of patent document CN discloses a kind of battery pack sealing detection system, including test connecting tube, storage
Liquid container and transparent pipe are provided with compressed air inlet on liquid storage container, and test connecting tube is connected to liquid storage container gas circuit, thus
So that the fluid column in transparent pipe is maintained at certain altitude using compressed air, and press to battery pack, if battery pack gas leakage, fluid column
Decline directlys adopt the pressure in liquid-column height detection closed system without accurate air pressure detection sensor and accurate instrument
Force value and change value of pressure.The detection system utilizes the pressure value and change value of pressure of the height detection closed system of fluid column, but
It is influenced by temperature, fluid column is possible to float up and down, therefore measurement result precision is not high.
105334003 A of patent document CN discloses a kind of power battery pack device for detecting sealability, including cabinet, case
Body upper cavity is equipped with test equipment, industrial personal computer, display, barcode scanning gun, and cabinet top is equipped with alarm lamp, and cabinet cavity of resorption is equipped with control
Electronic box processed, pneumatic triple piece.The detection device inputs automatic calling different model testing process by bar code, without artificial behaviour
Make design specialized test sealing frock, it is ensured that tooling will not be revealed in test.But the detection device be using air pressure difference and
The detection that the variation of pressure carries out, due to influence of the temperature vulnerable to illumination and heat source of air, measurement accuracy is not high.
106017821 A of patent document CN discloses a kind of battery sealing-performance detection system, passes through external vacuum pump
It evacuates and tests, under the action of inside and outside differential pressure, if battery sealing-performance is insufficient, the helium of inside battery penetrates leak hole, from battery core
It is interior to enter inner cavity, to detect its leakage rate.The shortcomings that utility model is to need using vacuum (-tight) housing and aspiration pump, at high cost；
And leakage point can not be found.
106525360 A of patent document CN discloses a kind of method for detecting Battery case leakproofness, and this method is to electricity
Before pond cabinet carries out waterproof experiment, cabinet to be measured is connected with standard box bodies by the first pipeline and the second pipeline first,
Judge whether cabinet has leakage by observing the variation of pressure gauge.The shortcomings that this method is to utilize air pressure difference and pressure
Variation, due to influence of the temperature vulnerable to illumination and heat source of air, measurement accuracy is not high.
107402107 A of patent document CN discloses a kind of for battery pack device for detecting sealability, including air pressure acquisition
Module is configured as obtaining the current gas pressure in the battery pack；Control module is configured as meeting in current gas pressure preset
When alert if, control warning device is alarmed.The utility model is equally the variation using air pressure difference and pressure, by
In influence of the temperature vulnerable to illumination and heat source of air, therefore measurement accuracy is not high.
Utility model content
The purpose of this utility model is to provide a kind of equipment for detecting battery system box sealing performance, utilize this
Equipment can carry out helium mass spectrum equal pressure positive pressure leak detection to battery system cabinet, can detect battery system case safe and efficiently
The sealing performance of body, measuring accuracy are high.
To achieve the above object, the utility model uses following technical scheme:
A kind of equipment for detecting battery system box sealing performance, the equipment include: vacuum tank, helium mass spectrum leak detection
Instrument, two groups of pumping pump groups, helium gas sources；Battery system cabinet is placed in vacuum tank when detection；Helium mass spectrometer leak detector passes through leak detection tube
Road connects vacuum tank；One group in two groups of pumping pump groups connects vacuum tank by exhaust pipe, and another group is connected by exhaust pipe
Connect battery system cabinet；Battery system cabinet passes through the helium gas source outside loading line connection；Battery system cabinet and vacuum tank
Atmosphere is connected with exhaust-valve by vent valve respectively；It is respectively equipped with pressure sensor outside vacuum tank and battery system cabinet, this two
A pressure sensor is separately connected PLC control unit；By circuit connector standards leak hole, which is used for setting vacuum tank
Standby precision carries out periodic calibration；Solenoid valve is respectively equipped on each pipeline, each solenoid valve is controlled by PLC control unit.
Preferably, multistage filtering net is installed at the port of the vacuum tank connection exhaust pipe.
Preferably, the vacuum tank is cylinder, is equipped with safe venting of dust explosion mouth at the geometric position center at the top of vacuum tank.
Preferably, the pumping pump group for connecting the vacuum tank is single-stage vacuum pump.
Preferably, throttling pipeline is equipped at the solenoid valve on leak detection tube road.
Preferably, the vacuum tank is connected with the helium background decontamination for filling nitrogen or fresh air into vacuum tank
Device.
Utility model has the advantages that
The equipment of the utility model belongs to vacuum box type equipressure helium Mass Spectrometer Method system, simulates tested work in the detection process
The actual condition of part carries out helium mass spectrum leak detection, eliminates misjudgment phenomenon caused by negative pressure leakage detection, the whole design of equipment ensure that
Calibration leak detection quantified precision, leak detection real result are accurate and reliable.
The equipment of the utility model can not only position the position of leakage, but also the leakage rate that can be leaked with accurate quantification, from
And by multiple test and experience accumulation, establish total leakage rate and battery system IP protection of electrokinetic cell system cabinet etc.
Relationship between grade, the formulation for battery system IP grade criterion in industry provide strong theory and data supporting.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the equipment that the utility model is used to detect battery system box sealing performance.
Fig. 2 is the annexation figure of major part in the equipment of the utility model.
Fig. 3 is the structural schematic diagram (top view) that battery system cabinet is packed into equipment during vacuum tank.
Fig. 4 is the process flow chart that battery system box sealing performance is detected using the equipment of the utility model.
Specific embodiment
The utility model is described further with reference to the accompanying drawings and examples, but is not meant to the utility model
The limitation of protection scope.
As shown in Figure 1-3, the utility model be used for detect battery system box sealing performance equipment include: vacuum tank 2,
Helium mass spectrometer leak detector 11, vacuum tank pumping pump group 9, battery system cabinet are evacuated pump group 10, helium gas source 12；Battery system when detection
Cabinet 3 is placed in vacuum tank 2；Helium mass spectrometer leak detector 11 passes through leak detection piping connection vacuum tank 3；Vacuum tank is evacuated pump group 9 and electricity
Cell system cabinet is evacuated pump group 10 and connects vacuum tank 2 by exhaust pipe respectively；Battery system cabinet 3 is connected by loading line
External helium gas source 12；Battery system cabinet 3 connects atmosphere with exhaust-valve by vent valve respectively with vacuum tank 2；Vacuum tank 2 and electricity
It is respectively equipped with pressure sensor in cell system cabinet 3, it is 15 yuan single which is separately connected PLC control；Each pipeline
On be respectively equipped with solenoid valve, each solenoid valve is controlled by PLC control unit 15；On exhaust pipe, leak detection pipeline and loading line
It is connected separately with vacuum meter 7,8.
As one of specific embodiment of the present utility model, as shown in figure 3, above-mentioned close for detecting battery system cabinet
The equipment of sealing property consists of the following parts:
1, vacuum tank leak detection platform and Work piece sealing fixture
Vacuum tank hunts leak platform as equipment key position, requires to set according to examined workpiece outer dimension and helium mass spectrum leak detection
Meter, vacuum tank are made of stainless steel 304, are processed by shot blasting after interior manufacture, and finish reaches 1.6 grades, in order to avoid inhale
Attached helium atom, and cause high helium background.
The opening structure reasonable simplicity safety of vacuum chamber door 6, vacuum tank door-opening mechanism are equipped with close to switch, switch chamber door
When, it need to ensure not influencing the object of vacuum door movement, personage may be injured to avoid during door switch.Chamber door is equipped with
Gripping mechanism prevents chamber door from surprisingly washing open and causes to damage to personnel's article.
2, battery system cabinet (workpiece) passes in and out case system
Vacuum door switch and feeding manner: workpiece 3 is placed on the supporting plate 4 of the outer trolley 5 of case, then the outer trolley of case and vacuum
Case (the outer trolley guide rod of cabinet directional hole and case) dock, will be pushed into vacuum tank equipped with the supporting plate of workpiece, helium will be filled in connecting box
Pipeline, manual switch chamber door.Place non-metal insulating material in the surface of supporting plate 4.
3, the release of battery system cabinet (workpiece) burst pressure and dust filtering system
The preliminary examination of the big leakage of workpiece and mechanical stress test are carried out in vacuum tank, and the pressurising operational design of user is answered
Avoid workpiece because strength problem bursts as far as possible, while equipment vacuum case requirement of strength design can bear the general broken of workpiece explosion
It is bad；New equipment increases while continuing to strengthen vacuum tank security intensity and excludes workpiece explosion release internal gas rapidly
Function further protects the safety of operator and equipment.Pressure relief opening 1 is located at the geometric position center of the surface of vacuum chamber,
Prevent explosion mouth from popping up object secondary injury.
While considering that vacuum pumping speed is few impacted as far as possible and reduces helium residual to the greatest extent, vacuum tank evacuates mouth installation in advance
Multistage filtering net prevents dust sundries etc. from entering vacuum pump system.
4, vacuum tank evacuation system
Since vacuum tank vacuum level requirements are not high, so selecting single-stage vacuum pump that can meet evacuation demand, single-stage pump can
By durable, it is fully able to meet testing requirements.
5 valves are housed altogether on vacuum tank, are respectively used to vacuum tank evacuation, vacuum tank leak detection, the leakage of vacuum tank mark, vacuum
Case decontamination, vacuum tank deflate, comprising: for control vacuum tank pumping extraction valve V1, for vacuum tank leak detection leak detector valve V2,
For the leak hole valve V3 of vacuum tank mark leakage, the extraction valve V4 for controlling the pumping of battery system cabinet, for controlling to battery system
System cabinet is filled with the charge valve V5 of helium, the vent valve V6 for controlling cabinet deflation.Valve V1, V4 interface can be with Roots's pump groups
It is connected directly；Leak detector valve V2 is connected to and closes with helium mass spectrometer leak detector for vacuum tank.Due to being wanted when helium mass spectrometer leak detector leak detection
The vacuum degree asked is high, so guaranteeing during leak detection at leak detector valve it is necessary to install throttling pipeline, leak detector vacuum makes
With in range.Leak hole valve V3 is mainly used for referance leak and connects with vacuum tank, and when automatic calibration equipment uses.Vent valve V6 is main
It deflates for vacuum tank, destroys the vacuum in vacuum tank, then pick and place workpiece.
5, the clear helium system of vacuum tank
Evacuation system reserves helium background decontamination apparatus, when helium background, which is higher than setting requirements, to be influenced to work normally, if
Standby automatic alarm prompts, and operator can force to fill nitrogen (nitrogen cylinder 17 as shown in Fig. 3 to system by decontamination apparatus
There is provided) or fresh air, remaining helium is replaced, helium background is reduced, works normally equipment.
6, workpiece helium charging system
Helium charging system is made of pressure reducing valve, pressure sensor, solenoid valve, safety valve, loading line etc..Equipment is from helium tank
High-pressure helium out passes through equipment pressure reducing valve, is reduced to using after pressure, just can be used.Pressure sensor and solenoid valve phase
Mutually cooperation automatically cuts off solenoid valve after workpiece inflation reaches operating pressure.
7, electric control system (be placed in Fig. 2, the electrical control cabinet 16 in 3 in)
Equipment electrical control system is designed according to international electric safety standard, has whole power-off earth leakage protective, Yi Jisan
The mutually defencive functions such as disconnected phase and the positive and negative identification of phase phase sequence.There is overcurrent and overheating protection to motor, electrical wiring has high-low pressure alert
Mark is accused, connector and the end of a thread have number.
The core control portions of electric control system using current industrial control field prevalence programmable controller PLC with
Person-computer union.
In view of the pressure-bearing situation of battery case, equipment is equipped with simultaneously takes out the two of battery system box house and extraneous gas
A vacuum system by the data of vacuum meter in two sets of vacuum systems of monitoring, and is automatically brought into operation valve, makes battery system cabinet
Inside and outside vacuum degree is almost the same in pumping process, avoids having excessive pressure difference to cause battery system case inside and outside battery system cabinet
The damage of body.
The leak detection tracking medium of equipment is helium in the utility model, and the leak detection index of system detection is set as a certain amount of helium
Gas leakage rate.The helium leak rates are set according to the leakage rate per year of the medium of product Eligibility requirements, and can be according to country
Standard and production need to adjust setting in a certain range.Wherein in complete equipment, the instrument for playing slip measurement is helium mass spectrum
Leak detector is the key instrument for detecting leakage rate, and helium mass spectrometer leak detector is really divided in the indoor helium of detection mass spectrum, and according to
Helium partial pressure is scaled leak rate to the pumping speed of helium by system.Its working principle is that: there is an ion source inside helium mass spectrometer leak detector, it will
It send from the helium of leak detection pipeline to ion source, ion source emits various particles by electric field, has a gear in inside
Plate has an aperture on baffle, and under certain magnetic fields, this aperture only allows helium particle to pass through, and does not allow other light grains
Son or heavy particle pass through, and the detection plate in the other side will monitor the quantity of helium particle in this way, and be scaled the quantity of helium,
To show the slip of helium on a display screen.
Suction gun leak detecting is a kind of positive pressure method leak detecting, and the purpose is to the part leak detection for test sample, work is former
Reason be the helium of certain pressure is filled in battery system cabinet, if the upper and lower covers junction of battery system cabinet or plug connector with
There is leakage point at the sealing of cabinet, the intracorporal helium of battery system case will be flowed out by leakage point；At this point, starting is connected to inspection
The suction gun on instrument is leaked, hand-held suction gun moves suction gun head with slower speed along the upper and lower covers edge of battery system cabinet, such as
Fruit has the position of leakage, and the helium leaked out from leakage point will be sucked by suction gun pipe, and then helium passes through rubber by suction gun pipe
Hose enters in leak detector, by the measurement compared with referance leak and calculates, obtains accurate leak detection value, at the same time,
Leak detector also can prompt have leakage point in place of operator's suction gun Guan Suojing by way of liquid crystal display is alarmed；With same method
Other can be continued to search by the leakage point of junction, thus can accurately and reliably find out letting out for entire battery system cabinet
Leak position.
Both the above method is combined, the leakage total amount of battery system cabinet can be obtained and leakage is accurately positioned
Position, and then fully understand the sealing performance of battery system cabinet.
As shown in figure 4, carrying out the equal pressure of battery system box sealing performance using the equipment of above-mentioned specific embodiment
Helium Mass Spectrometer Method, specific operation process are as follows:
1, the preparation before hunting leak
Start helium mass spectrometer leak detector, leak detector executes the sequence of leaving certainly of itself, waits it normal, this process probably needs
5 minutes.
When being not put into battery system cabinet, open pumping pump group, open pumping isolating valve, V1 and V4, to vacuum tank and
Battery system cabinet is vacuumized simultaneously, when the vacuum degree of vacuum tank reaches 12kPa (> 11.6kPa), closes extraction valve
V1 and V4 opens leak detector valve V2, records vacuum system background values.Referance leak valve V3 is opened, at this moment leak detector is detected by helium
Gas, etc. after data stabilizations, record the leak rate show value of leak detector, obtain this system divided by show value with referance leak leak rate value
Calibration factor.During actually leak detection, show value will just obtain the leak rate size of detected pieces multiplied by the calibration factor of system.
2, inflation leak detection
1) mesuring battary system cabinet is failed to judge greatly disconnected
Electrokinetic cell system cabinet is put into vacuum tank, the exhaust pipe of Battery case is connected, closes vacuum chamber door,
Pumping pump group is opened, vacuum meter is opened, opens the extraction valve V1 and V4 of battery system cabinet, vacuum degree is closed after being extracted into ± 2kPa
Valve waits 1 minute, and whether observation vacuum degree has apparent rising, fails to judge if not provided, the small of next step can be carried out
It is disconnected, if there is obviously rising, vent valve V6 is opened, to pressure reduction is carried out in Battery case and vacuum tank, it is big to open vacuum tank
Door unclamps piping connection, takes out battery system sample.
2) mesuring battary system cabinet it is small fail to judge it is disconnected
Extraction valve V1 and V4 are opened, vacuum chamber and battery system cabinet are vacuumized simultaneously, made in battery system cabinet
Outer pressure decline is consistent substantially, is extracted into vacuum degree to close V1 and V4 after 11.6kPa, is opened leak detector valve V2, observation is simultaneously
Record the helium leak rate value on leak detector.
3, leakage point is looked in suction gun leak detection
Suction gun leak detection, battery system test sample do not need to be put into vacuum chamber, and suction gun leak detection is firstly the need of by filling
Air pipe carries out battery system cabinet to fill helium, and pressure value cannot be greater than 4kPa at this time, seriously becomes to avoid battery system shell
Shape or damage.
Leak detector is opened, the leak detection mode setting of leak detector to suction gun is hunted leak mode, calibrates one with built-in referance leak
Then lower leak detector directly carries out air-breathing inspection with each position of the suction gun to automobile power battery system (PACK) cabinet shell
Leakage can also slowly be moved with the upper and lower covers junction of suction gun alignment battery system cabinet on leak detector.If some position is let out
Leakage, helium are entered in leak detector by suction gun and are detected, and leakage rate score are had on leak detector display screen, and use marking pen
Leak position detected by accurate marker suction gun.
Embodiment
Test sample in the present embodiment is new-energy automobile electrokinetic cell system, and upper casing is non-metal kind carbon fiber
SMC material, lower casing are cold-rolled steel sheet DC01 material.In general, pressure of the battery pack cabinet in performing leak test is determined
Size is determined by the pressure difference that bears of its upper casing.
In test, the speed of evacuation using PLC controller control to vacuum tank and battery system cabinet is needed, it is ensured that battery
The pressure difference of lodge inside and outside is no more than 4kPa, when pressure reaches the low pressure required value 11.6kPa of battery modules and single battery
When, it closes extraction valve and stops pumping, helium is filled with into sample by intake valve, as pressure >=11.6kP, and pressure difference >=4kPa
When, intake valve is closed, pressure keeps 3min, detects cabinet internal leakage to intracavitary by the helium mass spectrometer leak detector that connect with cabinet
Helium gas molecules, if there is leakage, then leak detector has show value, to show the leak rate of battery pack.
Leak detector provisioned in equipment is Germany Inficon, model LDS3000, referance leak provisioned in leak detector
Leak rate be 10-7MbarL/s is mainly used for before each test, carry out self calibration to the accuracy of test, is improved with this
The precision of detection.
In power battery industry, there is no at present to the accurate corresponding of the leak rate value of battery system cabinet and IP degree of protection
Relationship, but the application in precision instrument industries such as other fields such as space flight, medical treatment is more early, therefore this detection method has
The basic research of electrokinetic cell system industry progress promotion and application.
The empirical value relationship of leak rate and leak hole equivalent diameter is as shown in table 1 in industry.
The correspondence table of leak rate range and leak hole diameter in 1 industry of table
| Leak rate range (mbarL/s) | Leak hole equivalent diameter |
| 104 | 10mm |
| 102 | 1mm |
| 1 | 0.1mm |
| 10-2 | 0.01mm |
| 10-4 | 1μm(10-3mm) |
| 10-5 | 0.5μm(5×10-4mm) |
| 10-6 | 0.1μm(1×10-4mm) |
| 10-7 | 0.05μm(5×10-5mm) |
| 10-8 | 0.01μm(10-5mm) |
| 10-10 | 1nm(10-6mm) |
| 10-12 | Angstrom (Ethylmercurichlorendimide, 10-7mm) |
By the performing leak test of actual battery packet, the leak rate value measured is 9.2 × 10-6MbarL/s, but leak quickly
Rate value falls to 2.8 × 10-2MbarL/s shows that battery is surrounded by leakage.By testing leakage point with suction gun method, find in electricity
It is leaked at pond packet high-voltage line interface one, which is leakage point, and leak hole diameter is about 0.028mm.
Since helium content is low in atmosphere, as long as there is leakage to detect, detection accuracy is high, minimum 10- 12mbar·L/s；It is all by controller by each control valve of compressed air acts, in the very short time during leak detection
The interior confirmation and output that can complete test result.Sample is full of helium, is put into vacuum tank, can measure total
Leak rate.By the combination of suction gun method and vacuum tank method, the precision of battery system box body tightness detection can be greatlyd improve, with
And the accuracy for searching cabinet leakage point is improved, it provides for electrokinetic cell system research staff's upgrading product and timely believes
Breath feedback and strong data supporting.
Claims (6)
1. a kind of equipment for detecting battery system box sealing performance, which is characterized in that the equipment includes: vacuum tank, helium
Mass-spectrometer leak detector, two groups of pumping pump groups, helium gas sources；Battery system cabinet is placed in vacuum tank when detection；Helium mass spectrometer leak detector is logical
Cross leak detection piping connection vacuum tank；One group in two groups of pumping pump groups connects vacuum tank by exhaust pipe, and another group passes through pumping
Air pipe connects battery system cabinet；Battery system cabinet passes through the helium gas source outside loading line connection；Battery system cabinet
Pass through vent valve respectively with vacuum tank and connects atmosphere with exhaust-valve；Pressure sensing is respectively equipped with outside vacuum tank and battery system cabinet
Device, two pressure sensors are separately connected PLC control unit；Vacuum tank passes through circuit connector standards leak hole, the referance leak
For carrying out periodic calibration to equipment precision；Solenoid valve is respectively equipped on each pipeline, each solenoid valve is by PLC control unit control
System.
2. the equipment according to claim 1 for detecting battery system box sealing performance, which is characterized in that described true
Multistage filtering net is installed at the port of empty van connection exhaust pipe.
3. the equipment according to claim 1 for detecting battery system box sealing performance, which is characterized in that described true
Empty van is cylinder, is equipped with safe venting of dust explosion mouth at the geometric position center at the top of vacuum tank.
4. the equipment according to claim 1 for detecting battery system box sealing performance, which is characterized in that connection institute
The pumping pump group for stating vacuum tank is single-stage vacuum pump.
5. the equipment according to claim 1 for detecting battery system box sealing performance, which is characterized in that hunting leak
Throttling pipeline is equipped at solenoid valve on pipeline.
6. the equipment according to claim 1 for detecting battery system box sealing performance, which is characterized in that described true
Empty van is connected with the helium background decontamination apparatus for filling nitrogen or fresh air into vacuum tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822139534.9U CN209280231U (en) | 2018-12-19 | 2018-12-19 | A kind of equipment for detecting battery system box sealing performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822139534.9U CN209280231U (en) | 2018-12-19 | 2018-12-19 | A kind of equipment for detecting battery system box sealing performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209280231U true CN209280231U (en) | 2019-08-20 |
Family
ID=67611903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822139534.9U Active CN209280231U (en) | 2018-12-19 | 2018-12-19 | A kind of equipment for detecting battery system box sealing performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209280231U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109357819A (en) * | 2018-12-19 | 2019-02-19 | 国联汽车动力电池研究院有限责任公司 | It is a kind of for detecting the device and method of battery system box sealing performance |
| CN113074877A (en) * | 2021-04-30 | 2021-07-06 | 广东利元亨智能装备股份有限公司 | Air tightness detection process |
| CN113776738A (en) * | 2021-09-03 | 2021-12-10 | 厦门航天思尔特机器人系统股份公司 | Leakage testing equipment and leakage testing method |
| CN114415587A (en) * | 2022-01-20 | 2022-04-29 | 中国科学院上海高等研究院 | Adiabatic vacuum data acquisition control system and method for test station |
| CN117091772A (en) * | 2023-10-17 | 2023-11-21 | 宁德时代新能源科技股份有限公司 | Air tightness detection method and air tightness detection system |
-
2018
- 2018-12-19 CN CN201822139534.9U patent/CN209280231U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109357819A (en) * | 2018-12-19 | 2019-02-19 | 国联汽车动力电池研究院有限责任公司 | It is a kind of for detecting the device and method of battery system box sealing performance |
| CN113074877A (en) * | 2021-04-30 | 2021-07-06 | 广东利元亨智能装备股份有限公司 | Air tightness detection process |
| CN113776738A (en) * | 2021-09-03 | 2021-12-10 | 厦门航天思尔特机器人系统股份公司 | Leakage testing equipment and leakage testing method |
| CN113776738B (en) * | 2021-09-03 | 2023-10-27 | 厦门航天思尔特机器人系统股份公司 | Leakage testing equipment and leakage testing method |
| CN114415587A (en) * | 2022-01-20 | 2022-04-29 | 中国科学院上海高等研究院 | Adiabatic vacuum data acquisition control system and method for test station |
| CN114415587B (en) * | 2022-01-20 | 2023-09-29 | 中国科学院上海高等研究院 | Testing station heat insulation vacuum data acquisition control system and method |
| CN117091772A (en) * | 2023-10-17 | 2023-11-21 | 宁德时代新能源科技股份有限公司 | Air tightness detection method and air tightness detection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109357819A (en) | It is a kind of for detecting the device and method of battery system box sealing performance | |
| CN209280231U (en) | A kind of equipment for detecting battery system box sealing performance | |
| CN106525354B (en) | A kind of leak detection system and method for gas pipeline busbar shell | |
| CN101706039A (en) | Method for monitoring pressure pipeline leakage acoustic emission in nuclear power plant and monitoring system thereof | |
| CN107024324A (en) | The diaphragm gas meter dry check system of complete machine sealing helium and method | |
| CN103335791B (en) | A kind of based on the thin leak hunting method of helium mass spectrum quantitatively determining the longest time inspection time | |
| CN111964851B (en) | Aerostat valve airtightness detection system and detection method | |
| CN111380659A (en) | Airtightness testing device and method for power battery water cooling system | |
| CN203443754U (en) | Air storage tank leakage detection system | |
| CN103389193A (en) | Detecting system and method of leakage of gas cylinder | |
| CN220322645U (en) | Tightness test system | |
| CN210269078U (en) | Air tightness measuring device for plastic welding part | |
| CN113932992A (en) | Transformer oil static pressure device and transformer system | |
| CN109374230A (en) | A kind of car deceleration device shell air-tightness detection method | |
| CN114354086A (en) | Container type hydrogen storage cylinder air tightness test system | |
| CN203011652U (en) | Automobile water pump assembly sealing test system | |
| CN214173677U (en) | Pressure maintaining testing device | |
| CN205958209U (en) | Power battery package gas tightness detection device | |
| CN113866349A (en) | Quick test calibration device and calibration method for hydrogen concentration sensor | |
| CN112229581A (en) | Filter assembly test bench | |
| CN209214674U (en) | Generator hydrogen system hydrogen population parameter integrates on-line monitoring system | |
| CN220969158U (en) | Hydrogen-carrying kettle and hydrogen loss testing device comprising same | |
| CN208505792U (en) | A kind of fire extinguisher bottle pressure resistant testing device | |
| CN106443407A (en) | Mini-type high-temperature and high-pressure test system and method | |
| CN111504579A (en) | Diaphragm air pressure tank and safety detection method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |