CN110426158A - A kind of detection method of battery pack cabinet air-tightness - Google Patents
A kind of detection method of battery pack cabinet air-tightness Download PDFInfo
- Publication number
- CN110426158A CN110426158A CN201910620412.8A CN201910620412A CN110426158A CN 110426158 A CN110426158 A CN 110426158A CN 201910620412 A CN201910620412 A CN 201910620412A CN 110426158 A CN110426158 A CN 110426158A
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- CN
- China
- Prior art keywords
- battery pack
- inert gas
- pack cabinet
- detection method
- detection device
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/202—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material using mass spectrometer detection systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/226—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of detection methods of battery pack cabinet air-tightness, including inert gas is full of in battery pack cabinet, carry out air-leakage test using inert gas detection device in the outer surface of battery pack cabinet；When detecting inert gas leakage, gas leak position is determined.The present invention can quickly measure the leak rate of battery pack cabinet and quickly positioning battery pack cabinet gas leak position, reduction battery pack cabinet air-leakage test activity time improve battery pack cabinet air-leakage test efficiency.
Description
Technical field
The present invention relates to a kind of detection methods, and in particular to a kind of detection method of battery pack cabinet air-tightness.
Background technique
With international community to air pollution phenomenon attention rate increase and traditional energy (natural gas, petroleum etc.) increasingly
Anxiety, electric car and hybrid vehicle have become the focus development project of domestic and international automobile vendor, as new-energy automobile,
Its market value and technology content is all highest, wherein core component of the power battery as electric car, its stabilization
Property, safety are directly related to the performance of vehicle, and the high volume applications as new technology, are considered as mostly important one safely
.In order to guarantee that battery pack being capable of safe power supply, must be requested that power battery pack has stronger dust and water protection ability.In order to avoid
Dust and water cause short circuit after entering battery pack, cause danger, generate heavy losses, or even threaten the person peace of driver and passenger
Entirely.So particularly important to the detection of the IP degree of protection for the battery pack produced.
In the prior art, to the principle of battery pack detection air-tightness are as follows: 1. aeration phases: it is empty to fill compression in battery pack
Gas makes to reach inside it certain pressure；2. the pressure stabilizing stage: closing charge valve, stop the inflation in battery pack, make internal pressure
It keeps stablizing；3. test phase: the atmospheric pressure value inside detection battery pack has unchanged, and records；4. judging the stage: contrast test
The situation of change of pressure value in stage, sees if there is and is declined, and judges whether the seal request for reaching design.
There are the following problems for above-mentioned detection method:
(1) in order to detect the IP degree of protection of battery pack, it is necessary to have a voltage stabling control and testing time, the two stages
Duration be generally a few minutes or even longer, therefore low efficiency；
(2) it once discovery leakage, can not quickly confirm leak site, but needs entire sealing surface filling suds,
It observes and confirms either with or without the method for generating bubble, time-consuming and laborious, inefficiency, and subjectivity is larger, the position inaccuracy of confirmation.
And efficiency is vital in the automobile industry of mass production, so, the detection of above-mentioned battery pack air-tightness
Method needs to improve.
Summary of the invention
The present invention to solve the above-mentioned problems, to provide a kind of detection side of high-efficient battery pack cabinet air-tightness
Method.
In order to achieve the above objectives, technical scheme is as follows:
A kind of detection method of battery pack cabinet air-tightness, the detection method include:
It is full of inert gas in battery pack cabinet, is carried out in battery pack box outer surface using inert gas detection device
Air-leakage test；When detecting inert gas leakage, gas leak position is determined.
In a preferred embodiment of the invention, the test point of inert gas detection device is the sealing of battery pack cabinet
Face.
In a preferred embodiment of the invention, inert gas detection device contains alarm, outside battery pack cabinet
When surface or sealing surface detect inert gas leakage, alarm starting.
In a preferred embodiment of the invention, the leak rate value of inert gas detection device detection is more than or equal to 1 × 10-
When 3pam3/s, alarm starting.
In a preferred embodiment of the invention, the inflating port for inflation that battery pack cabinet is equipped with.
In a preferred embodiment of the invention, when inert gas is helium, inert gas detection device is helium matter
Compose leak detector；Or when inert gas is Krypton, inert gas detection device is isotope mass spectrometer.
In a preferred embodiment of the invention, detection method includes:
S1 starts inert gas detection device, is adjusted to suction gun mode, and set the leak rate of inert gas detection device
Alarming value；
S2 is full of inert gas in battery pack cabinet；
S3, by the sealing Surface scan on the outside of the suction gun head alignment battery pack cabinet of inert gas detection device, or alignment electricity
The scanning of pond lodge external surface；
S4 illustrates that battery pack cabinet has gas leakage, does not have such as when inert gas detection device detects inert gas
It detects inert gas, illustrates that battery pack cabinet does not have gas leakage.
In a preferred embodiment of the invention, when inert gas detection device is alarmed, stop scanning, determine suction gun
Head scan position is gas leak position.
In a preferred embodiment of the invention, leak rate alarming value is more than or equal to 1 × 10-3pam3When/s, alarm is opened
It is dynamic.
In a preferred embodiment of the invention, inert gas detection device is visual alarm and/or audio alert
Device.
In a preferred embodiment of the invention, the precision of inert gas detection device is 1E-6Pam3/s；The gas
The environment temperature of close property detection is 10 DEG C -30 DEG C, humidity 30%-70%.
The beneficial effects of the present invention are:
Detection method provided by the invention can quickly measure the leak rate of battery pack cabinet and quickly position battery pack cabinet
Battery pack cabinet air-leakage test activity time is reduced in gas leakage position, improves battery pack cabinet air-leakage test efficiency.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is detection schematic diagram of the inert gas detection device to battery pack cabinet.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or indirectly on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined." several " are meant that one or more, unless otherwise specifically defined.
In the description of the present invention, it is to be understood that, term " center ", " length ", " width ", " thickness ", "upper",
The orientation or position of the instructions such as "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside"
Relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, without referring to
Show or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot manage
Solution is limitation of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside two elements.It for the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term in the present invention is understood as the case may be.
The detection method of battery pack cabinet air-tightness provided by the present application comprising:
When in battery pack cabinet be full of inert gas after, by inert gas detection device battery pack box outer surface into
Row air-leakage test does not such as detect inert gas, then illustrates that battery pack cabinet does not have gas leakage；Such as detect indifferent gas
Body illustrates that battery pack cabinet has gas leakage, and gas leak position is precisely determined in the short time.
By filling inert gas safety in battery pack cabinet, torpescence is detected by inert gas detection device
Whether battery pack cabinet has inert gas leakage, and voltage stabling control in the prior art and testing time, battery pack cabinet is omitted
It is interior to be tested at once full of inert gas, battery pack cabinet air-leakage test activity time is reduced, provides pond significantly
The testing efficiency of lodge body air-leakage test, position, that is, gas leak position, i.e. short time of inert gas detection device alignment
Interior accurate determining gas leak position, avoids long using detection time in the prior art, position is not accurate, and subjectivity is strong
Drawback.There are the inflating ports for inflation after battery pack box sealing, by the outlet pipe indifferent gas bodily indolence on inert gas bottle
Property gas be directly inserted into be formerly used on battery pack cabinet filling air inflating port be filled.
It is preferred that the detection of air-leakage test inert gas is carried out at the sealing surface on the outside of battery pack cabinet, therefore the application is surveying
When examination, it will directly be detected at the sealing surface of inert gas detection device alignment battery pack cabinet, i.e., by the test point of equipment
For the sealing surface of battery pack cabinet.It can be further reduced detection time in this way, improve detection efficiency,
In addition, prevent some battery pack cabinets from occurring as soon as damage before sealing, and if only to being detected at sealing surface,
Leakage can be can't detect in this way, so as to cause danger, therefore the application can also detect all outer surfaces of battery pack cabinet,
Safety can be improved in this way.
Preferably, inert gas detection device contains alarm, when use inert gas detection device is to battery pack cabinet
When carrying out air-leakage test, warning note can be also carried out.Specifically, when detecting inert gas, alarm starts immediately, just
Leak site is quickly confirmed in staff, the position of inert gas detection device scanning when leak site is exactly inert gas alarm
It sets, repeats to detect without the outer surface again to battery pack cabinet, can further improve work ratio in this way.
Preferably, when the leak rate value of the gas leak position of inert gas detection device detection is greater than 1 × 10-3pam3/s,
Alarm starting.The design of air-flow amount detector can detecte leak rate, can quickly position the gas leakage on battery pack cabinet
Position.
Leak rate refer to it is known sew place's two sides pressure difference in the case where, the given of gas leak position is flowed through in the unit time
The dry gas amount of temperature.
Alarm on inert gas detection device is specifically as follows visual alarm and/or phonetic alarm.
It is preferred that the precision of inert gas detection device is 1E-6Pam3/ s, inert gas are helium or Krypton.Inert gas
When for helium, inert gas detection device is helium mass spectrometer leak detector；Or when inert gas is Krypton, inert gas detection device
For isotope mass spectrometer, specifically, helium mass spectrometer leak detector and/or isotope mass spectrometer can be commercially available, such as: INFICON
Protec P3000 leak detector etc..
It is preferred that the environment temperature of the air-leakage test of battery pack cabinet is 10 DEG C -30 DEG C, humidity 30%-70%.It is setting
Under the conditions of fixed temperature and pressure, with efficient stable can test, the accuracy of test is high.
It is preferred that the leak rate detected is less than 1 × 10-3pam3When/s, the air-tightness of battery pack cabinet meets production requirement, In
Dustproof and waterproof effect is good in transport and use process, highly-safe, and preferably 1 × 10-3pam3/ s~1 × 10-4pam3/ s, further
Preferably 7.1 × 10-4pam3/s。
Referring to Fig. 1, above-mentioned inert gas detection device 100, and the application is by testing and paying many times creativeness
Labour learns that precision is highest when detecting using inert gas of the inert gas detection device 100 to battery pack cabinet 200
's.
Here is the specific detecting step of the application:
S1 starts inert gas detection device 100, is adjusted to suction gun mode, and set inert gas detection device
Leak rate alarming value；
S2 is full of inert gas in battery pack cabinet 200；
The suction gun head 111 of suction gun 110 on inert gas detection device 100 is directed at 200 outside of battery pack cabinet by S3
The appearance Surface scan in 200 outside of the scanning of sealing surface 210 or alignment battery pack cabinet；
S4 illustrates that battery pack cabinet has gas leakage, such as when inert gas detection device 100 detects inert gas
It does not detect inert gas, illustrates that battery pack cabinet does not have gas leakage.
Wherein, inert gas detection device 100, when the starting of the alarm of inert gas detection device, is stood in scanning
It carves and stops scanning, determine that suction gun head scan position is gas leak position.
The leak rate alarming value of inert gas detection device 100 is more than or equal to 1 × 10-3pam3/s.The present invention can be surveyed quickly
The leak rate of battery pack cabinet and quickly positioning battery pack cabinet gas leak position out, reduce battery pack cabinet air-leakage test work
The sequence time improves battery pack cabinet air-leakage test efficiency.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of detection method of battery pack cabinet air-tightness, which is characterized in that the detection method is included in battery pack cabinet
It is interior to be full of inert gas, air-leakage test is carried out using inert gas detection device in the outer surface of the battery pack cabinet；When
When detecting inert gas leakage, gas leak position is determined.
2. a kind of detection method of battery pack cabinet air-tightness according to claim 1, which is characterized in that the indifferent gas
The test point of physical examination measurement equipment is the sealing surface of the battery pack cabinet.
3. a kind of detection method of battery pack cabinet air-tightness according to claim 2, which is characterized in that the indifferent gas
Physical examination measurement equipment contains alarm, described when the battery pack box outer surface or sealing surface detect inert gas leakage
Alarm starting.
4. a kind of detection method of battery pack cabinet air-tightness according to claim 3, which is characterized in that when the inertia
The leak rate value of gas detection equipment detection is more than or equal to 1 × 10-3pam3When/s, the alarm starting.
5. a kind of detection method of battery pack cabinet air-tightness according to claim 1, which is characterized in that the battery pack
Cabinet is equipped with the inflating port for inflation.
6. a kind of detection method of battery pack cabinet air-tightness according to any one of claims 1-4, which is characterized in that
When the inert gas is helium, the inert gas detection device is helium mass spectrometer leak detector；Or when the inert gas is
When Krypton, the inert gas detection device is isotope mass spectrometer.
7. a kind of detection method of battery pack cabinet air-tightness according to claim 1, which is characterized in that the detection side
Method includes:
S1 starts the inert gas detection device, is adjusted to suction gun mode, and the leak rate report of inert gas detection device is arranged
Alert value；
S2 is full of inert gas in the battery pack cabinet；
The suction gun head of the inert gas detection device is directed at sealing Surface scan on the outside of the battery pack cabinet or right by S3
Appearance Surface scan on the outside of the quasi- battery pack cabinet；
S4 illustrates that the battery pack cabinet has gas leakage, such as when the inert gas detection device detects inert gas
It does not detect inert gas, illustrates that the battery pack cabinet does not have gas leakage.
8. a kind of detection method of battery pack cabinet air-tightness according to claim 7, which is characterized in that when the inertia
When gas detection equipment is alarmed, stop scanning, determines that the suction gun head scan position is gas leak position.
9. a kind of detection method of battery pack cabinet air-tightness according to claim 7, which is characterized in that the leak rate report
Alert value is more than or equal to 1 × 10-3pam3When/s, alarm starting.
10. a kind of detection method of battery pack cabinet air-tightness according to claim 1, which is characterized in that the inertia
The precision of gas detection equipment is 1E-6Pam3/s；The environment temperature of the air-leakage test is 10 DEG C -30 DEG C, and humidity is
30%-70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910620412.8A CN110426158A (en) | 2019-07-10 | 2019-07-10 | A kind of detection method of battery pack cabinet air-tightness |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910620412.8A CN110426158A (en) | 2019-07-10 | 2019-07-10 | A kind of detection method of battery pack cabinet air-tightness |
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| CN110426158A true CN110426158A (en) | 2019-11-08 |
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| CN201910620412.8A Pending CN110426158A (en) | 2019-07-10 | 2019-07-10 | A kind of detection method of battery pack cabinet air-tightness |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111912577A (en) * | 2020-08-18 | 2020-11-10 | 广州小鹏汽车科技有限公司 | Detection method and device |
| CN112345163A (en) * | 2020-10-16 | 2021-02-09 | 天津七所高科技有限公司 | Device and method for detecting air leakage position of welding seam of lower cover of automobile battery box |
| CN115265935A (en) * | 2021-04-30 | 2022-11-01 | 宁德时代新能源科技股份有限公司 | Leakage detection method and system for box body |
| WO2022242373A1 (en) * | 2021-05-17 | 2022-11-24 | 中国第一汽车股份有限公司 | Battery box body and detection method for battery box body |
| WO2024033053A1 (en) * | 2022-08-12 | 2024-02-15 | Lisa Dräxlmaier GmbH | Method and system for checking for leaks in a battery housing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111912577A (en) * | 2020-08-18 | 2020-11-10 | 广州小鹏汽车科技有限公司 | Detection method and device |
| CN112345163A (en) * | 2020-10-16 | 2021-02-09 | 天津七所高科技有限公司 | Device and method for detecting air leakage position of welding seam of lower cover of automobile battery box |
| CN115265935A (en) * | 2021-04-30 | 2022-11-01 | 宁德时代新能源科技股份有限公司 | Leakage detection method and system for box body |
| WO2022242373A1 (en) * | 2021-05-17 | 2022-11-24 | 中国第一汽车股份有限公司 | Battery box body and detection method for battery box body |
| WO2024033053A1 (en) * | 2022-08-12 | 2024-02-15 | Lisa Dräxlmaier GmbH | Method and system for checking for leaks in a battery housing |
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