CN201965006U - Lithium ion battery differential pressure formula leak hunting device - Google Patents
Lithium ion battery differential pressure formula leak hunting device Download PDFInfo
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- CN201965006U CN201965006U CN2011200324229U CN201120032422U CN201965006U CN 201965006 U CN201965006 U CN 201965006U CN 2011200324229 U CN2011200324229 U CN 2011200324229U CN 201120032422 U CN201120032422 U CN 201120032422U CN 201965006 U CN201965006 U CN 201965006U
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Abstract
The utility model relates to lithium ion battery differential pressure formula leak hunting device, including air supply, differential pressure pick-up, primary standard substance container and examined container. The air is fed in the air supply passes through the inflation valve. Two pipelines are set up on the pipeline of the intercommunication air supply respectively through the balanced valve. These two pipelines are connected with little leakages primary standard substance container and the examined container. Respective partial pressure container on both the primary standard substance container and the measured object container is connected by big leak detection valve. Differential pressure pick-up is installed between the primary standard substance container and the examined container. The efficiency of the differential pressure formula leak hunting method of this utility model is higher than other leak hunting methods such as water examine method, bubble method. One detected circulation needs only tens seconds. It not only has the traditional dry-type leak hunting's simple and convenient, high-efficient, low-cost, non-subsequent handling characters but also has strong interference killing feature and high precision. It can realize the seamless connection with the helium mass spectrum, and no blind spot of hunting leak appears.
Description
Technical field
The utility model belongs to technical field of electrochemistry, particularly relates to a kind of lithium ion battery differential pressure type leakage detection apparatus.
Background technology
Along with the fast development of spationautics, no matter be Aero-Space or underwater ordnance, power supply is described as " heart " and " blood " of machine product, and the power supply safety of power supply reliably is that the security of power supply product is primary.The security of power supply product mainly is made up of Safety Design, technology ensuring and three links of check assessment, and wherein check is the last item quality control line.The principal mode that influences at present the battery product security is for being short circuit and open circuit, no matter is Aero-Space with lithium ion battery or underwater ordnance lithium ion battery, and in a single day seal leakage takes place battery all may cause battery failure.The thick traditional leak hunting method of current battery mainly contains water inspection, fluorocarbon oil leak detection etc., and these method complex process, efficient is low, cost is high, and the method that wherein has also belongs to the destructive test method, influences battery performance; In addition, these methods are connected with the quantity of back pressure method helium mass spectrum examining value and have the blind area.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art part, and the lithium ion battery differential pressure type that can effectively realize tested lithium ion battery reliability and security leakage detection apparatus is provided.
This patent can also adopt following technical measures to realize:
Lithium ion battery differential pressure type leakage detection apparatus, comprise source of the gas, gas filling valve, differential pressure pick-up, primary standard substance container and tested container, source of the gas is by the gas filling valve air feed, it is characterized in that: on the pipeline that is communicated with source of the gas, two pipelines are set respectively by equalizing valve, these two pipelines connect little leakage primary standard substance container and tested container respectively, primary standard substance container and measured object container detect valve by gross leak and are connected separately branch pressure vessel, between primary standard substance container and tested container differential pressure pick-up are installed.
And, be provided with equalizing valve on described two pipelines that connect little leakage primary standard substance container and tested container respectively.
And described primary standard substance container and the measured object container gross leak by separately detects valve and is connected separately branch pressure vessel.
Advantage and the good effect that the utlity model has are:
1, the differential pressure type leak detecting that the utility model adopted is than the efficient height of other leak hunting methods such as water inspection, bubble method, one is detected circulation and only needs tens seconds, not only have the easy, efficient, low-cost of conventional dry leak detection and do not have the characteristics of follow-up operation, also have the characteristics that antijamming capability is strong, precision is high simultaneously, can realize and the mass spectral seamless connection of helium, the blind spot of hunting leak can not occur.
2, the utility model has improved detectability greatly, has reduced the detection cost, makes lithium ion battery reach the sealing reliability standard, has improved the reliability and the security of battery.
Description of drawings
Fig. 1 is a system of the present utility model connection diagram.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and by specific embodiment, and following examples are descriptive, are not determinate, can not limit protection domain of the present utility model with this.
Lithium ion battery differential pressure type leakage detection apparatus comprises source of the gas 1, gas filling valve 2, differential pressure pick-up 8, primary standard substance container 7 and tested container 6, and source of the gas is by gas filling valve and to system's air feed.On the pipeline that is communicated with source of the gas two pipelines are set respectively, equalizing valve 3,11 all is installed on each pipeline, these two pipelines connect little leakage primary standard substance container and tested container respectively.Primary standard substance container and measured object container also are connected branch pressure vessel 10,4 separately respectively, also are separately installed with gross leak on the pipeline that divides pressure vessel separately and detect valve 9,5 connecting; Between primary standard substance container and tested container, differential pressure pick-up is installed.
Principle of work of the present utility model is:
The principle of this differential pressure type leak detection system is basic identical with general differential pressure type leak locator, just be connected two airtight branch pressure vessels that can open and close with position with cell shapes, material, the identical primary standard substance that does not leak again of size in that tested battery is installed, its trace routine is carried out in two steps.
The first step is that little leak rate detects: tested battery and primary standard substance are put into primary standard substance container and measured object container respectively, seal, start gas filling valve inflation pressurization simultaneously in two containers, after stopping pressurization, wait for certain hour, if tested battery has smaller small opening, the gas in the tested container will flow to tested battery inner chamber gradually, and the container inner pressure that causes putting tested battery reduces gradually.Like this, two containers have just formed pressure differential, and differential pressure pick-up comes out with regard to energy measurement; If bigger small opening is arranged on the tested battery, in the pressurising process, the higher gas of pressure can enter tested battery inner chamber than faster, after causing pressurising to stop, the pressure of tested battery inner chamber is identical with container pressure of living in, tested battery has leakage also to no longer include gas to flow to tested battery, and container pressure remains unchanged; The primary standard substance container pressure of placing standard also remains unchanged, and differential pressure pick-up does not just have signal output.That is to say that when native system did not have leakage signal to show, tested battery may not leak, and big leakage may be arranged yet.In order to address this problem, detect so will carry out big leak rate of second step.
Second step, big leak rate detected.The little leak rate of the first step detect finish after, open two gross leaks automatically and detect valves, make the little leakage container of placing tested battery and the standard (see figure 1) that communicates with gross leak primary standard substance container and tested container respectively.If tested battery has big leakage, the gas of its inner chamber adds the gas gross of place container, more than the gas flow in the container of placing primary standard substance, open with after container is communicated with when detecting valve, the final equalized pressure of tested battery one end will be higher than the final equalized pressure of primary standard substance one end, differential pressure pick-up has signal output, illustrates that tested battery has big leakage.After first and second two step all finished, native system can be judged according to resulting two groups of aggregation of data, provide the conclusion of acceptance or rejection.The differential pressure type leak detection can be used for the leak detection of lithium ion battery than the gross leak rate, comes together to judge that with the data that the leak detection of helium mass spectrum back pressure obtains whether qualified tested battery is; It also can be used to allow the not too strict lithium ion battery leak detection of leak rate in addition, does not do the leak detection of helium mass spectrum back pressure and directly does the leak detection of first difference pressure type and just can satisfy the leak detection requirement.
Illustrate: be example by 32 lithium ion battery differential pressures are hunted leak, and conjunction with figs. is described in detail as follows:
Experimental facilities
Prepare 1.1 detect
1.1.1 minimum detectable leak rate calibration
The corrector that use is installed on the experimental facilities carries out the minimum detectable leak rate calibration.With all putting into leak free exemplar in tested little leakage container and the primary standard substance container, test pressure is adjusted to experimental status.At little Leak Detection state, adjust the corrector simulated leakage.When differential pressure displayed value on the leak locator reaches 10 times of minimum resolution, record corrector volume change amount, and by the supporting computed in software minimum detectable leak rate of instrument.The experimental facilities minimum detectable leak rate of this experiment is 2.5 * 10-5Pa.m
3/ s (when differential pressure is 10Pa).According to the leakage requirement of lithium ion battery, setting little leakage alarm value is 40Pa, and the gross leak alarming value is 450Pa, and corresponding leak rate is 1 * 10-4Pa.m
3/ s.
1.1.2 detected parameters is set
According to conditional parameters such as the working environment of lithium ion battery and internal capacities, calculate suitable experiment condition by software simulation.The experiment parameter of this detection is: test pressure 150kPa, inflationtime 8s, equilibration time 3s, little Leak Detection time 20s, gross leak 5s detection time, evacuation time 3s.
1.2 leak detection program
The leak detection program is as follows:
A) open differential pressure type leak locator equipment, regulate source of the gas, make it to be in normal leak detection state, test pressure is 150kPa, and blank run 3 times is more than-5 times.
Parameters such as the pressing time of determining when b) calibration of tested battery being set on leak locator, equilibration time, detection time, the differential pressure value of unacceptable product correspondence is 40Pa when little leak rate being set detecting, the differential pressure value of unacceptable product correspondence was 450Pa when big leak rate detected.
C) tested battery and standard are put into corresponding leak detection test container respectively.
D) begin to hunt leak according to the leak locator working specification.
The experimental data that 32 lithium ion batteries are detected:
It is as follows that it detects step:
(1) little leak rate detects: after tested element and primary standard substance are put into two containers of leak locator respectively, start leak locator, instrument pressurizes in two containers simultaneously by the Automatic Program that sets.After stopping pressurization, if detected pieces has smaller small opening, the gas in the container will flow to the detected pieces inner chamber gradually, and the interior pressure of container that causes putting detected pieces reduces gradually.Because primary standard substance does not leak, can not reduce so put the interior pressure of container of primary standard substance.Like this, just different through the pressure in latter two container of certain hour, differential pressure pick-up just can be measured the pressure difference value in two containers.Little leak rate detects and finishes, and instrument will change big leak rate trace routine automatically over to.
(2) big leak rate detects: if bigger small opening is arranged on the detected pieces, in the pressurising process, gas can be gone into the detected pieces inner chamber than Jin faster, pressure in the pressure of the detected pieces inner chamber container very fast and of living near or identical, it is constant or change very little to put pressure in the container of detected pieces after causing pressurising to stop.In addition, because primary standard substance does not leak, the interior pressure of container of putting primary standard substance can not change.Therefore, the pressure with in two containers putting detected pieces of putting primary standard substance is identical or be more or less the same, and the output of differential pressure pick-up signal is very little or do not have signal output, may will fail to judge to little leakage greatly or not leak.In order to address this problem, so arranged big leak rate to detect this step.
The method that big leak rate detects is: after little leak rate detection finishes, automatically two gross leaks opening on the instrument detect valve, two containers with putting detected pieces of placing primary standard substance are communicated with other a pair of complexion container, if detected pieces has big leakage, the gas of detected pieces inner chamber adds that the gas gross mass that the gas total mass ratio of place container is put in the container of primary standard substance wants many, after gross leak detects valve open and the complexion container is communicated with, the final equalized pressure of detected pieces one end, final equalized pressure height than primary standard substance one end, differential pressure pick-up just has signal output, and illustrating has bigger small opening on the detected pieces.
Have only when little leak rate detects and leak rate detection reaction value all meets the requirements greatly, leak locator judges that just detected pieces is qualified.Otherwise leak locator will judge that detected pieces is defective.
S-DET is the differential pressure in little Leak Detection stage in the data, and L-DET is the differential pressure of gross leak detection-phase, and unit is Pa.
Little leak judgement standard is 40Pa, and corresponding slip is: 1 * 10-4Pam
3/ s.Gross leak criterion is 450Pa.
Conclusion: above 32 batteries are certified products through the thick Leak Detection of differential pressure.
From experimental result as can be seen, differential pressure type leak detecting repeatability when certified products detect is good, can obviously distinguish for the unacceptable product that surpasses predetermined leak rate simultaneously.
Claims (3)
1. lithium ion battery differential pressure type leakage detection apparatus, it is characterized in that: comprise source of the gas, gas filling valve, differential pressure pick-up, primary standard substance container and tested container, source of the gas is by the gas filling valve air feed, on the pipeline that is communicated with source of the gas, two pipelines are set respectively by equalizing valve, these two pipelines connect little leakage primary standard substance container and tested container respectively, primary standard substance container and measured object container detect valve by gross leak and are connected separately branch pressure vessel, between primary standard substance container and the tested container differential pressure pick-up are installed.
2. tool lithium ion battery differential pressure type leakage detection apparatus according to claim 1 is characterized in that: be provided with equalizing valve on described two pipelines that connect little leakage primary standard substance container and tested container respectively.
3. tool lithium ion battery differential pressure type leakage detection apparatus according to claim 1 is characterized in that: described primary standard substance container and the measured object container gross leak by separately detects valve and is connected separately branch pressure vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200324229U CN201965006U (en) | 2011-01-30 | 2011-01-30 | Lithium ion battery differential pressure formula leak hunting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200324229U CN201965006U (en) | 2011-01-30 | 2011-01-30 | Lithium ion battery differential pressure formula leak hunting device |
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| CN201965006U true CN201965006U (en) | 2011-09-07 |
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| CN2011200324229U Expired - Fee Related CN201965006U (en) | 2011-01-30 | 2011-01-30 | Lithium ion battery differential pressure formula leak hunting device |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215394A (en) * | 2014-09-12 | 2014-12-17 | 天津博益气动股份有限公司 | Device and method for detecting sensing coefficient of differential pressure sensor by utilizing leaking hole |
| CN106525360A (en) * | 2016-12-09 | 2017-03-22 | 合肥国轩高科动力能源有限公司 | Method for detecting tightness of battery box body |
| CN107991040A (en) * | 2017-12-01 | 2018-05-04 | 遵义市产品质量检验检测院 | A kind of intelligent pressure container leak detection systems |
| CN108007652A (en) * | 2017-12-02 | 2018-05-08 | 天津博益气动股份有限公司 | A kind of airtight leak detector of the differential pressure type of multichannel and leak hunting method |
| CN108398219A (en) * | 2018-05-09 | 2018-08-14 | 东莞市德瑞精密设备有限公司 | Lithium battery leak test device and test method |
| CN108534963A (en) * | 2018-03-16 | 2018-09-14 | 昆山丘钛微电子科技有限公司 | A kind of water proofing property detection method and system |
| CN108731888A (en) * | 2018-03-14 | 2018-11-02 | 中航锂电（洛阳）有限公司 | A kind of battery pack IP67 protection reliability test system |
| CN109211473A (en) * | 2017-06-30 | 2019-01-15 | 通用电气公司 | Method and system for the test of container leakage airtightness |
| CN109540421A (en) * | 2017-09-21 | 2019-03-29 | 青海时代新能源科技有限公司 | Air tightness detection device and method |
| CN110118635A (en) * | 2019-04-24 | 2019-08-13 | 深圳市卓翼科技股份有限公司 | Differential pressure type air-tightness tester and test method |
| CN111929012A (en) * | 2020-07-03 | 2020-11-13 | 安徽皖仪科技股份有限公司 | Soft package air tightness detection system and method |
| CN113029466A (en) * | 2021-03-05 | 2021-06-25 | 师大瑞利光电科技(清远)有限公司 | Detection method and device for air-tight equipment and electronic equipment |
| CN113252257A (en) * | 2021-06-10 | 2021-08-13 | 山东奥扬新能源科技股份有限公司 | Battery package gas tightness check out test set |
| CN115127753A (en) * | 2022-06-15 | 2022-09-30 | 重庆长安新能源汽车科技有限公司 | Container air tightness detection method and system |
-
2011
- 2011-01-30 CN CN2011200324229U patent/CN201965006U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215394A (en) * | 2014-09-12 | 2014-12-17 | 天津博益气动股份有限公司 | Device and method for detecting sensing coefficient of differential pressure sensor by utilizing leaking hole |
| CN106525360A (en) * | 2016-12-09 | 2017-03-22 | 合肥国轩高科动力能源有限公司 | Method for detecting tightness of battery box body |
| CN109211473A (en) * | 2017-06-30 | 2019-01-15 | 通用电气公司 | Method and system for the test of container leakage airtightness |
| CN109540421A (en) * | 2017-09-21 | 2019-03-29 | 青海时代新能源科技有限公司 | Air tightness detection device and method |
| CN107991040A (en) * | 2017-12-01 | 2018-05-04 | 遵义市产品质量检验检测院 | A kind of intelligent pressure container leak detection systems |
| CN108007652A (en) * | 2017-12-02 | 2018-05-08 | 天津博益气动股份有限公司 | A kind of airtight leak detector of the differential pressure type of multichannel and leak hunting method |
| CN108731888A (en) * | 2018-03-14 | 2018-11-02 | 中航锂电（洛阳）有限公司 | A kind of battery pack IP67 protection reliability test system |
| CN108534963A (en) * | 2018-03-16 | 2018-09-14 | 昆山丘钛微电子科技有限公司 | A kind of water proofing property detection method and system |
| CN108398219A (en) * | 2018-05-09 | 2018-08-14 | 东莞市德瑞精密设备有限公司 | Lithium battery leak test device and test method |
| CN108398219B (en) * | 2018-05-09 | 2024-04-12 | 东莞市德瑞精密设备有限公司 | Lithium battery leakage test equipment and test method |
| CN110118635A (en) * | 2019-04-24 | 2019-08-13 | 深圳市卓翼科技股份有限公司 | Differential pressure type air-tightness tester and test method |
| CN111929012A (en) * | 2020-07-03 | 2020-11-13 | 安徽皖仪科技股份有限公司 | Soft package air tightness detection system and method |
| CN113029466A (en) * | 2021-03-05 | 2021-06-25 | 师大瑞利光电科技(清远)有限公司 | Detection method and device for air-tight equipment and electronic equipment |
| CN113252257A (en) * | 2021-06-10 | 2021-08-13 | 山东奥扬新能源科技股份有限公司 | Battery package gas tightness check out test set |
| CN113252257B (en) * | 2021-06-10 | 2021-09-10 | 山东奥扬新能源科技股份有限公司 | Battery package gas tightness check out test set |
| CN115127753A (en) * | 2022-06-15 | 2022-09-30 | 重庆长安新能源汽车科技有限公司 | Container air tightness detection method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20180130 |