CN103837310B - Device for preventing error detection and using method thereof - Google Patents
Device for preventing error detection and using method thereof Download PDFInfo
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- CN103837310B CN103837310B CN201410117970.XA CN201410117970A CN103837310B CN 103837310 B CN103837310 B CN 103837310B CN 201410117970 A CN201410117970 A CN 201410117970A CN 103837310 B CN103837310 B CN 103837310B
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- 238000007689 inspection Methods 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 9
- 229910001416 lithium ion Inorganic materials 0.000 description 9
- 238000003466 welding Methods 0.000 description 7
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- 230000005540 biological transmission Effects 0.000 description 3
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a device for preventing error detection and a using method thereof, and the device comprises a vacuum module and an induction control module, wherein the vacuum module comprises a vacuum pump, a vacuum buffer tank and an air suction rod which are sequentially connected through a pipeline, the tail end of the air suction rod is connected with an air suction nozzle, a first valve is arranged on the pipeline between the vacuum pump and the vacuum buffer tank, a second valve is arranged on the pipeline between the vacuum buffer tank and the air suction rod, and the induction control module comprises an air pressure sensor, a light sensor, a processor, a first controller and a second controller. The method has the advantages of simple and quick operation steps, easy realization and strong practicability, basically eliminates the unreliability of the cell leakage detection device, greatly reduces the proportion of misjudging the gas-leakage battery into the gas-leakage-free battery in the battery leakage detection process, improves the product quality, reduces the rejection proportion of the battery, and improves the economic benefit and brand benefit of battery manufacturing enterprises.
Description
Technical field
The invention belongs to lithium ion battery and manufacture field, relate to a kind of lithium ion battery leak detection apparatus, especially
It relates to a kind of lithium ion battery leak detection and surveys device and using method thereof for preventing by mistake.
Background technology
Along with Global Oil resource is nervous, air environmental pollution aggravation.The pure electric automobile of energy-conserving and environment-protective by
It is known as the Main way of 21 century automobile industry development.Domestic and international each automobile vendor slowly turns one's attention to
Pure electric automobile and hybrid vehicle.These trend will promote rapidly sending out of new-energy automobile industry significantly
Exhibition, also production and research and development for lithium ion battery provide good platform.Pure electric automobile most critical part is
Battery module, module is made up of cell connection in series-parallel.Monomer lithium ion battery just becomes the portion of most critical
Point.The performance quality of monomer lithium ion battery will directly affect the performance of whole battery module.Also will impact electricity
Motor-car properly functioning.
In lithium ion battery production process, when, after core winding into shell, battery case must make with battery cap seam crossing
Use Laser Welding firm welding.But in laser beam welding, after there is welding fried fire phenomenon welding in occasional
Weld seam have trachoma；Operation shakinesses because of weld jig abrasion and laser-beam welding machine self etc. are because usually there is void
The phenomenons such as weldering, weldering are leaked, weld strength is low.For the battery case of rosin joint solder skip when follow-up leaking hunting, compare
The most screened out, but the most difficult detection of battery of slight gas leakage after laser welding.
Leakage battery is carried out statistical analysis, causes two chief reasons that have of battery leakage: first is battery case
Body weld strength is inadequate, although qualified through leak detection, but during subsequent use, the weldering of battery
Seam cracking causes leakage；Second is some battery weld seam failure weldings, slightly or substantially leaks gas, but is revealing
During detection compromised detection device be mistaken for qualified.Leak detection operation is observed and statistical analysis, makes
Becoming gas leakage battery to be mistaken for certified products and have two main causes, first is to leak hunting in bar lower end of leaking hunting in leak-checking apparatus
Mouth is deformed by excessive compression in working order, fails to be formed path inside the mouth that leaks hunting, to be measured when vacuum detecting
Battery is mistaken for favorable sealing property, i.e. mesuring battary is air tight；Second is to leak hunting under bar in leak-checking apparatus
End leak hunting mouth in working order time cover at the non-bore region that leaks hunting of battery cap, the mesuring battary when vacuum detecting
Be mistaken for favorable sealing property, i.e. mesuring battary is air tight.
The battery of leakage, in addition to the performance that poor-performing affects whole Battery pack group, there is also bigger potential safety hazard.
Electrolyte in battery once flows out in battery container can be with the moisture generation chemical reaction air, not only
The performance of battery can be directly affected, the electrolyte meeting corrosion cell group casing of outflow, will also result in ring simultaneously
Environment pollution.During effectively preventing leak detection, it is qualified that gas leakage battery compromised detection device is mistaken for,
Prevent from surveying device and method in the urgent need to a kind of suitable lithium battery leak detection by mistake.
Summary of the invention
Present invention aims to lithium ion battery leak detection process, propose a kind of practicality, easy
Prevent device and the using method thereof by mistake surveyed.
The purpose of the present invention can be achieved through the following technical solutions:
One prevents from surveying device and using method thereof by mistake, lets out including vacuum module, sensing control module and battery
Dew detection module, described vacuum module includes passing sequentially through vacuum pump, the vacuum buffer tank of pipeline connection, filling
Gas bar, inflation bar end connects charging connector, and the pipeline between vacuum pump and vacuum buffer tank is provided with valve one,
Pipeline between vacuum buffer tank and air-breathing bar is provided with valve two.
Described sensing control module includes the baroceptor being located on vacuum buffer tank, is located at air-breathing bar
The light sensor of working position, also includes processor, controller one and controller two, described baroceptor
Signal output part be connected with processor signal input, the signal output part of described light sensor and process
Device signal input part connects；Described processor signal outfan is connected with controller one signal input part, described
Processor signal outfan is connected with controller binary signal input；Described controller one controls connecting valve one,
Described controller two controls connecting valve two；Described processor signal outfan be also respectively connected with green, blueness,
Red three display lamps.
Described prevent from surveying the leak detection apparatus that device can be parallel with 6-8 respectively by mistake and support the use.Prevent
Surveying the device corollary apparatus as battery leakage detection device, prevent surveying device can not be independently to battery by mistake by mistake
Carry out leak detection.
Battery after Laser Welding being welded is fixed in the special standard fixture meeting battery size, by suction nozzle
Pulling operating position, the vacuum noz(zle) of air-breathing bar is connected with mesuring battary leak detection hole.Pass through vacuum buffer
Valve controlling on the pipeline of the tank left and right sides, to battery vacuum-pumping to be measured more intrinsic pressure in monitoring vacuum buffer tank
(after respectively to evacuation before and after battery vacuum-pumping to be measured).By processor relatively to battery vacuum-pumping to be measured
After operation, the changing value of surge tank pressure reduction, then this value is compared with the standard value determined by ad hoc fashion
Relatively, surveying, if wrong, the operation judged by accident, red alarm signal lights contained by apparatus of the present invention is bright, enters operator
Row alarm.
Its detection method concrete operation step is as follows:
I), before vacuum pump is opened, valve one is in open mode, and valve two is closed, air-breathing bar
It is in off-position, vacuum buffer tank connects baroceptor.Prevent with one of them leak detection
As a example by surveying device, detected sample battery is put between leak detection standard fixture the most by mistake.
II) this prevents from surveying device before formal use by mistake, it is thus necessary to determine that prevent the intrinsic pressure by mistake surveying device special
Value indicative P2 and vacuum loss relax setting value P3: it is empty that the pipeline between valve two and Sample Cell is contained within normal pressure
Gas, when carrying out leak detection, vacuum buffer tank initial pressure is that (P1 is preset value to P1, i.e. leak detection system
Operating pressure required by system, less than a standard atmosphere pressure pressure), air-breathing bar 6 lower suction mouth is sealed
Tight, valve one closes, and valve two is opened, the air that the pipeline between valve two and Sample Cell is contained within
Vacuum buffer tank 3 internal pressure can be made to rise to P2 from P1, and pressure value change can obtain from baroceptor
Take；In view of preventing from surveying device vacuum loss present in the actual condition by mistake, can set and prevent from surveying device by mistake
Vacuum loss relax setting value P3 (suggestion P3 value be 10-100Pa), P3 value is judgement testing sample battery
The most blocked with between valve two associates foundation, the judgement of the most wrong survey during being leak detection
Foundation.
III) starting leak detection apparatus, start simultaneously and prevent from surveying device by mistake, vacuum pump is started working, vacuum
Connecting baroceptor on surge tank tank body, the pressure value obtained when baroceptor is gradually decrease to program
During operating pressure P1 of presetting leak detection equipment, baroceptor outputs signal to processor, processes
Device outputs signal to green indicating lamp, and green indicating lamp is bright, represents leak detection apparatus and prevents from surveying device by mistake
It is ready for complete, leak detection operation can be carried out.
IV) air-breathing bar manually being pulled down to operating position, sensed by light sensor, light sensor exports
Signal is to processor (processor includes time set or program), and processor starts timing, processor during t=0s
Outputing signal to controller one, valve one is closed by controller one, and t1 value (rule of thumb can be set by t=t1
For 0.2-0.5s) time output signal of processor to controller two, controller two, valve two is opened, if to be measured
Pipeline between battery and vacuum buffer tank is unobstructed, has air to enter vacuum buffer tank in testing sample battery.
V) processor continues timing to t=t2 (according to preventing from surveying device build-in attribute and practical experience is reasonable by mistake
Determine, typically may be set to 5-10s) time, the pressure value P 4 of baroceptor monitoring, and convey information to
Processor.Processor starts to calculate and compare: if P4 >=P2+P3, then explanation mesuring battary and vacuum buffer tank
Between pipeline unobstructed, leak detection real result is credible, and output signal of processor is to blue indicator light, blue
Color display lamp is bright, represents the real result preventing from by mistake surveying device prompting leak detection credible；If P4 < P2+P3,
Then the pipeline between explanation mesuring battary and vacuum buffer tank is obstructed, and the result of leak detection has the wind of erroneous judgement
Danger, processor transmits a signal to red led, and red led is bright, and representative prevents surveying device prompting by mistake and lets out
The result of dew detection is insincere, and mesuring battary has the risk by mistake being surveyed erroneous judgement.
Beneficial effects of the present invention: apparatus of the present invention operating procedure is simple, fast, is easily achieved, practicality
By force, substantially eliminate the unreliability of battery core leak detection apparatus, will gas leakage during battery leakage detection
Battery is judged into the ratio of air tight battery by accident and will be substantially reduced, and is implemented by the present invention, Improving The Quality of Products,
Reduce battery and scrap ratio, improve economic benefit and the brand benefit of battery manufacture enterprise.
Accompanying drawing explanation
For the ease of it will be appreciated by those skilled in the art that the present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the present invention.
In figure: 1, vacuum pump, 2, valve one, 3, vacuum buffer tank, 4, baroceptor, 5, valve
Two, 6, air-breathing bar, 7, Sample Cell, 8, light sensor, 9, processor, 10, controller one,
11, controller two, 12, green indicating lamp, 13, blue indicator light, 14, red led.
Detailed description of the invention
As it is shown in figure 1, a kind of lithium ion battery leak detection prevents from surveying device and using method thereof by mistake, include
Vacuum module and sensing control module；Described vacuum module include pass sequentially through pipeline connect vacuum pump 1,
Vacuum buffer tank 3, air-breathing bar 6, air-breathing bar 6 end connect have vacuum noz(zle), vacuum noz(zle) in working order time straight
Connect the leak detection hole with mesuring battary 7 to be directed at and vacuum is tightly connected, vacuum pump 1 and vacuum buffer tank 3
Between pipeline be provided with valve 1, the pipeline between vacuum buffer tank 3 and air-breathing bar 6 is provided with valve 25；
Described sensing control module include be located on vacuum buffer tank 3 tank body baroceptor 4, be located at suction
The light sensor 8 of gas bar 6 working position, also includes processor 9, controller 1 and controller 2 11；
The signal output part of described baroceptor 4 is connected with processor 9 signal input part, described light sensor 8
Signal output part be connected with processor 9 signal input part；Described processor 9 signal output part and controller
One 10 signal input parts connect, and described processor 9 signal output part is with controller 2 11 signal input part even
Connect；Described controller 1 controls connecting valve 1, and described controller 2 11 controls connecting valve 25；
Described processor 9 signal output part is also respectively connected with green indicating lamp 12, blue indicator light 13 and red instruction
Lamp 14.
Leak detection apparatus can arrange containing 6-8 parallel prevent from surveying device by mistake.Prevent from surveying device to make by mistake
For the corollary apparatus of battery leakage detection device, prevent surveying device by mistake and can not carry out battery independently revealing inspection
Survey.
Working method:
I) before vacuum pump 1 is opened, valve 1 is in open mode, and valve 25 is closed, and inhales
Gas bar 6 is in off-position, and (volume of suggestion surge tank 3 is mesuring battary volume to vacuum buffer tank 3
It is advisable for 2-5 times) connect baroceptor 4 on tank body.As a example by one of them leak detection prevents from surveying device by mistake,
Detected sample battery 7 is put between leak detection standard fixture.
II) this prevents from surveying device before formal use by mistake, it is thus necessary to determine that prevent from surveying the intrinsic pressure feature of device by mistake
Value P2 and vacuum loss relax setting value P3: have pipeline, pipeline to include between valve 25 and Sample Cell 7
Having atmospheric air, when carrying out leak detection, vacuum buffer tank 3 initial pressure is that (P1 is preset value to P1, i.e.
Operating pressure required by leak detection systems, less than a standard atmosphere pressure pressure), by air-breathing bar 6 lower end
Vacuum noz(zle) seals tight, and valve 1 closes, and valve 25 is opened, between valve 25 and Sample Cell 7
The air that is contained within of pipeline vacuum buffer tank 3 internal pressure can be made to rise to P2 from P1, pressure value becomes
Change can obtain from baroceptor 4；Consider that prevent surveying device vacuum that may be present in actual condition damages by mistake
Consumption, can set the vacuum loss preventing by mistake surveying device and relax setting value P3 (suggestion P3 value as 10-100Pa),
P3 value, for judging the most blocked between testing sample battery 7 and valve 25 to associate foundation, is leakage
The judgment basis of the most wrong survey during detection.
III) starting leak detection apparatus, start simultaneously and prevent from surveying device by mistake, vacuum pump 1 is started working, vacuum
Connecting baroceptor 4 on surge tank 3 tank body, the pressure value obtained when baroceptor 4 is gradually decrease to
During operating pressure P1 of the leak detection equipment that program is presetting, baroceptor 4 outputs signal to processor
9, processor 9 outputs signal to green indicating lamp 12, and green indicating lamp 12 is bright, represents leak detection apparatus
And prevent surveying device by mistake and be ready for complete, leak detection operation can be carried out.
IV) air-breathing bar 6 is manually pulled down to operating position, sensed by light sensor 8, light sensor 8
Outputing signal to processor 9 (processor 9 includes time set or program), processor 9 starts timing, t=0s
Time processor 9 output signal to controller 1, valve 1 is closed by controller 1, and t=t1 (can be by
T1 value is set as 0.2-0.5s) time processor 9 output signal to controller 2 11, controller 2 11 is by valve
Door 25 is opened, if the pipeline between mesuring battary 7 and vacuum buffer tank 3 is unobstructed, and testing sample battery 7
In have air enter surge tank 3.
V) when processor 9 continues timing to t=t2 (typically may be set to 5-10s), baroceptor 4
The force value of monitoring is P4 and transmits a signal to processor 9.Processor 9 starts to calculate and compare: if
P4 >=P2+P3, then the pipeline between explanation mesuring battary 7 and vacuum buffer tank 3 is unobstructed, leak detection result
Genuine and believable, processor 9 outputs signal to blue indicator light 13, and blue indicator light 13 is bright, represents and prevents by mistake
The real result surveying device prompting leak detection is credible；If P4 < P2+P3, then explanation mesuring battary 7 and vacuum
Pipeline between surge tank 3 is obstructed, and the result of leak detection has the risk of erroneous judgement, processor 9 transmission letter
Number giving red led 14, red led 14 is bright, represents the result preventing from by mistake surveying device prompting leak detection
Insincere, mesuring battary has the risk by mistake being surveyed erroneous judgement.
Subordinate list 1, leak detection apparatus do not installs when preventing surveying device by mistake, and battery is after transmission from one meridian to another leak detection is qualified
(air tight) circulates to next procedure, statistics gas leakage number of batteries during the multiple process operations in rear road,
8 batch gas leakage number of batteries of random statistical and ratio, average leak ratio is about 0.127%.
Subordinate list 1, completes according to summary of the invention to place and surveys device by mistake, and be arranged in leak detection apparatus,
Battery (air tight) after transmission from one meridian to another leak detection is qualified circulates to next procedure, in the multiple process operations in rear road
During statistics gas leakage number of batteries, 8 batches of random statistical gas leakage number of batteries and ratio, average leak
Ratio is about 0.012%.By two groups of Data Comparisons, it is not difficult to conclude that in leak detection apparatus and this is installed
Prevent from described in bright surveying device by mistake, the gas leakage battery ratio of leak detection appearance after qualified can be reduced about
90%.Apply and of the present invention prevent from surveying device by mistake, battery gas leakage ratio occurs after can being substantially reduced leak detection
Example, reduction product, because of scrapping that gas leakage causes, decreases resultant battery and the general of leakage occurs on end product
Rate, saves considerable maintenance expense, and the quality public praise of significant increase product and prestige, promotes brand shape
As and be worth.
Table 1 is installed and is prevented from surveying device by mistake and not installing the equipment gas leakage number of batteries statistics preventing from by mistake surveying device
Above content is only to present configuration example and explanation, the technology of affiliated the art
Described specific embodiment is made various amendment or supplements or use similar mode to substitute by personnel,
Without departing from invention structure or surmount scope defined in the claims, the present invention all should be belonged to
Protection domain.
Claims (4)
1. prevent from surveying a device by mistake, including vacuum module, sensing control module: it is characterized in that,
Described vacuum module includes passing sequentially through the vacuum pump (1) of pipeline connection, vacuum buffer tank (3), inhaling
Gas bar (6), air-breathing bar (6) end connects vacuum noz(zle), vacuum noz(zle) in working order time directly with reveal inspection
Leak detection hole alignment the vacuum of surveying standard fixture are tightly connected, described vacuum pump (1) and vacuum buffer tank
(3) pipeline between is provided with valve one (2), the pipeline between vacuum buffer tank (3) and air-breathing bar (6)
It is provided with valve two (5)；
Described sensing control module include being located at the baroceptor (4) above vacuum buffer tank (3) tank body,
It is located at the light sensor (8) of air-breathing bar working position side, also includes processor (9), controller one (10)
With controller two (11), the signal output part of described baroceptor (4) inputs with processor (9) signal
End connects, and the signal output part of described light sensor (8) is connected with processor (9) signal input part,
Described processor (9) signal output part is connected with controller one (10) signal input part, described processor (9)
Signal output part is connected with controller two (11) signal input part, and described controller one (10) controls to connect
Valve one (2), described controller two (11) controls connecting valve two (5), described processor (9) signal
Outfan connects green indicating lamp (12), blue indicator light (13) and red led (14) respectively.
2. prevent from surveying the using method of device described in a claim 1, it is characterised in that operating procedure by mistake
As follows:
I), before vacuum pump (1) is opened, valve one (2) is in open mode, and valve two (5) is in pass
Closed state, air-breathing bar (6) is in off-position, and detected sample battery (7) is put into leak detection
Between standard fixture；
II) prevent from surveying device before the most formal use by mistake, first to determine its intrinsic pressure eigenvalue P2 and
Vacuum loss relaxes setting value P3, and the pipeline between valve two (5) and Sample Cell (7) is contained within normal pressure
Air, when carrying out leak detection, vacuum buffer tank (3) initial pressure is preset value P1, by air-breathing bar (6)
Lower suction mouth seals tight with the leak detection hole of leak detection standard fixture, and valve one (2) closes, valve
Door two (5) is opened, and the air that the pipeline between valve two (5) and Sample Cell (7) is contained within can make
Vacuum buffer tank (3) internal pressure rises to pressure characteristic value P2, pressure value change energy from preset value P1
Enough from baroceptor (4) acquisition；
III) starting leak detection apparatus, start simultaneously and prevent from surveying device by mistake, vacuum pump (1) is started working,
The pressure value obtained when baroceptor (4) is gradually decrease to the work of the presetting leak detection equipment of program
When making pressure P1, baroceptor (4) outputs signal to processor (9), processor (9) output signal
To green indicating lamp (12), green indicating lamp (12) is bright, represents leak detection apparatus and prevents from surveying device by mistake
It is ready for complete, carries out leak detection operation；
IV) air-breathing bar (6) is manually pulled down to operating position, sensed by light sensor (8), light
Induction apparatus (8) outputs signal to processor (9), and processor (9) starts timing, processor (9) during t=0s
Outputing signal to controller one (10), valve one (2) is closed by controller one (10), processes during t=t1
Device (9) outputs signal to controller two (11), and valve two (5) is opened by controller two (11), if treating
Surveying the pipeline between battery and vacuum buffer tank (3) unobstructed, testing sample battery has air to enter in (7)
Vacuum buffer tank (3)；
V) when processor (9) continues timing to t=t2, the pressure value P 4 that baroceptor (4) is monitored,
Conveying information to processor (9), processor (9) starts to calculate and compare: if P4 >=P2+P3, then illustrate
Pipeline between mesuring battary and vacuum buffer tank (3) is unobstructed, and leak detection real result is credible, processor
(9) outputing signal to blue indicator light (13), blue indicator light (13) is bright, represents and prevents from surveying device by mistake
The real result of prompting leak detection is credible；If P4 < P2+P3, then explanation mesuring battary and vacuum buffer tank (3)
Between pipeline obstructed, the result of leak detection has the risk of erroneous judgement, processor to transmit a signal to redness to refer to
Showing lamp (14), red led (14) is bright, and representing the result preventing from by mistake surveying device prompting leak detection can not
Letter, mesuring battary has the risk by mistake being surveyed erroneous judgement.
The using method preventing from by mistake surveying device the most according to claim 2, it is characterised in that described very
It is a specified pressure in 10-100Pa that setting value P3 is relaxed in empty loss, and described t1 is set as in 0.2-0.5s
One special time, described t2 is set as a special time in 5-10s.
The using method preventing from by mistake surveying device the most according to claim 2, it is characterised in that reveal inspection
Survey device arrange containing 6-8 parallel prevent from surveying device by mistake.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410117970.XA CN103837310B (en) | 2014-03-27 | 2014-03-27 | Device for preventing error detection and using method thereof |
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| CN103837310B true CN103837310B (en) | 2016-08-17 |
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| CN106054799A (en) * | 2016-08-08 | 2016-10-26 | 上海上汽马瑞利动力总成有限公司 | Error proofing tool for absorbing valve core bead and assembling platform |
| CN106216258A (en) * | 2016-09-21 | 2016-12-14 | 深圳迈森自动化设备有限公司 | A kind of lithium battery erroneous judgement reflux |
| CN108181061B (en) * | 2018-01-16 | 2024-07-09 | 重庆安木科技有限公司 | New energy automobile battery package test system |
| CN110411669B (en) * | 2019-07-22 | 2024-05-31 | 江苏亨睿碳纤维科技有限公司 | Leakage detection device outside autoclave |
| CN112729727A (en) * | 2020-12-15 | 2021-04-30 | 长沙君成包装机械有限公司 | Vacuum leakage detection system in packaging container and process method |
| CN115288995A (en) * | 2022-08-29 | 2022-11-04 | 华能山东石岛湾核电有限公司 | Fault-tolerant type diaphragm breakage detection device and system for diaphragm compressor |
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| US4715214A (en) * | 1986-10-03 | 1987-12-29 | S. Himmelstein And Company | Leak tester |
| JP5105218B2 (en) * | 2005-06-06 | 2012-12-26 | トヨタ自動車株式会社 | Abnormality judgment device |
| JP4506580B2 (en) * | 2005-06-22 | 2010-07-21 | パナソニック電工株式会社 | Sealed leak test method |
| JP4378733B2 (en) * | 2007-11-08 | 2009-12-09 | トヨタ自動車株式会社 | Fuel cell system and method for determining hydrogen leak in the system |
| JP5709573B2 (en) * | 2011-02-18 | 2015-04-30 | 本田技研工業株式会社 | Evaporative fuel processing equipment |
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