CN110068762A - Soft-package battery packaging effect detection device and detection method - Google Patents
Soft-package battery packaging effect detection device and detection method Download PDFInfo
- Publication number
- CN110068762A CN110068762A CN201910257686.5A CN201910257686A CN110068762A CN 110068762 A CN110068762 A CN 110068762A CN 201910257686 A CN201910257686 A CN 201910257686A CN 110068762 A CN110068762 A CN 110068762A
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- lower sheeting
- notch
- battery core
- plastic film
- hard tracheae
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- 238000001514 detection method Methods 0.000 title claims abstract description 54
- 230000000694 effects Effects 0.000 title claims abstract description 26
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 24
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002985 plastic film Substances 0.000 claims abstract description 24
- 229920006255 plastic film Polymers 0.000 claims abstract description 24
- 239000000565 sealant Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims description 13
- 238000007654 immersion Methods 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000007547 defect Effects 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 17
- 238000004458 analytical method Methods 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 abstract description 2
- 238000005538 encapsulation Methods 0.000 description 15
- 239000000499 gel Substances 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 238000007789 sealing Methods 0.000 description 4
- 230000037303 wrinkles Effects 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The present invention provides a kind of soft-package battery packaging effect detection device and detection methods, detection device includes upper tabletting, lower sheeting, hard tracheae, nut and air pump device, detection method using such detection device is: marking a notch on packaging electric core aluminum plastic film first, the lower sheeting for being fixed with hard tracheae is put into battery core by notch, then the one side upper tabletting with sealant presses aluminum plastic film, it is fixed again by nut, it places into clear water, hard tracheae is connected air pump device by gas piping, and the air-blowing into packaging electric core, observe the gas leakage situation of battery core aluminum plastic film under different air pressures, judge the packaging effect of battery core according to this, the validity of cell package intuitively can be effectively determined by the method, and it can be measured the pressure voltage of the limit, theoretical foundation is provided for battery core failure analysis.
Description
Technical field
The present invention relates to technical field of lithium-ion battery, in particular to a kind of soft-package battery packaging effect detection device
And detection method.
Background technique
Currently, packaging effect is a key factor for influencing battery performance in soft package lithium battery manufacturing field.If envelope
Dress effect is bad, and encapsulation cannot completely cut off inside battery positive/negative plate and electrolyte and ambient enviroment completely, then will lead in environment
Vapor enter inside battery, react with ingredients such as positive/negative plate, the electrolyte of inside battery and generate gas, finally
Lead to battery bulge phenomenon.Although apparent encapsulation breakage can be detected before factory, general micropore is then difficult to detect.
Guarantee encapsulation effect, material and sealed in unit are critically important a part, but more importantly how
How confirmation confirms that envelope is effectively, could to formulate the parameter that equipment seals and the process that monitoring entirely produces, in this way to guarantee
Validity is encapsulated when volume production, prevents the generation of Quality Accident.Existing conventional method is by measuring seal thickness, seal colloidal sol
And the method for seal pulling force, assess the validity of encapsulation.But this method part undesirable condition is accurately to detect
Come, for example, seal crumple and gel metal and gel between to have the gap both bad.
Prior art discloses a kind of detection methods (201611168348.7) of soft package lithium battery packaging effect to use
The ALF aluminum plastic film of encapsulation interspaces in advance, and is no less than the liquid of 0.0001g to aluminum plastic film injection by this gap, then carries out
Final encapsulation, stands and whether the liquid for observing encapsulation the inside has leakage, and the effect of cell package is judged with this.But such side
Method needs longer detection time to crumple this situation of seal, for apertured bad between gel metal and gel
Situation can not detect.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, propose a kind of soft-package battery packaging effect detection device and
Detection method intuitively can effectively determine the validity of cell package using the detection method of such detection device, and be capable of measuring
The pressure voltage of the limit out provides theoretical foundation for battery core failure analysis.
To achieve the goals above, the present invention provides a kind of soft-package battery packaging effect detection device, including upper tabletting, under
Tabletting, hard tracheae, nut and air pump device；The lower sheeting is equipped with first through hole, hard tracheae one end and lower sheeting
First through hole be fixedly connected, the hard tracheae be lateral wall set threaded hollow pipe fitting；The upper tabletting includes substrate
And sealant, the sealant uniformly stick on base lower surface, the upper tabletting is equipped with the second through-hole, for across hard
Matter tracheae；The nut is for compressing tabletting；The air pump device is connect by gas piping with the hard tracheae other end.
Further, the lower sheeting is bar shaped thin slice, and is equipped with gap in the direction of the width, and gap is passed through with first through hole
It is logical.
Further, it is additionally provided with pressure-regulating valve on the gas piping, for adjusting the size of detection pressure.
Further, the sealant is the material that silica gel or rubber have elastic packing.
The present invention also provides a kind of soft-package battery method for testing packaging effect, are detected using above-mentioned soft-package battery packaging effect
Device, the detection method step include:
It (1), is 20~25mm notch along the standardized a length of straight line by the aluminum plastic film for encapsulating battery lateral surface；
(2), the lower sheeting is put into battery core by notch, so that the upper surface of lower sheeting is bonded aluminum plastic film, simultaneously
The hard tracheae is by notch towards outside battery core；Mobile lower sheeting, so that lower sheeting is located at the position that can cover notch；
(3), the second through-hole of the upper tabletting is passed through into hard tracheae, so that the sealant face paste of upper tabletting closes aluminum plastic film
And notch is covered, while top board and lower platen being kept to be arranged in parallel；Nut is passed through hard tracheae, and tightening nut, is made
Tabletting and lower sheeting are tightly engaged into aluminum plastic film.
(4), battery core is put into pond, and injects limpid, transparent water into pond, and submerge battery core.
(5), the other end of hard tracheae is connected by gas piping with air pump device, opens air pump device, slowly will
Air pressure is transferred to different atmospheric pressure values and is detected；When inflating test under every kind of atmospheric pressure value, certain time, observation side seal portion are stood
Whether position has bubble to emerge, if there is bubble to emerge, judges that the encapsulation of this aluminum plastic film has encapsulation defect, and can directly observe close
Seal Gas leak position.
Further, the position of notch described in step (1) is the position placed convenient for upper tabletting and lower sheeting, such as electricity
The front and behind of core or side etc..
Further, it is as follows by notch to be put into the step in battery core for lower sheeting described in step (2): first by lower sheeting
Enter notch in the width direction then when notch reaches lower sheeting gap position, to move and rotate along gap direction, so that
Lower sheeting fully enters inside battery core, at the same the hard tracheae by notch towards outside battery core.
Further, water immersion battery core height component in step (4), in the altitude range of pond, at least more than 5 times battery cores
Thickness.
Further, the value of air pressure adjustment is 0.1~0.6Mpa in step (5)；Time of repose is 5~10 minutes.
Since present invention employs above technical scheme, the beneficial effect for having the application is:
1, soft-package battery packaging effect detection device of the present invention compresses lower sheeting, upper tabletting by nut, so that plastic-aluminum
The notch gluing, sealing of film, structure is simple, easy to operate.
2, the air-blowing into the aluminum plastic film of sealing first of the invention, then detects the encapsulation of aluminum plastic film by water as medium
Effect, it is easy to operate, and can quickly detect the leakproofness of encapsulation.
3, the characteristic of bubbling, is not easy to beat at the seal detected for conventional method when the present invention is revealed in water using gas
Sealing propertytest caused by wrinkling, substantially reduces detection time.
4, the characteristic of bubbling when the present invention is revealed in water using gas, for having between gel metal and gel
The undesirable condition in gap can also make effective sealing propertytest, so that the detection to cell aluminum-plastic membrane is more comprehensive, effectively prevent
Defective products occurs in the market.
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 a kind of soft-package battery packaging effect detection device stereoscopic schematic diagram of the present invention.
Fig. 2 is the connection schematic diagrams such as a kind of soft-package battery packaging effect detection device top board of the present invention and lower platen.
Appended drawing reference is as follows:
1, upper tabletting；11, substrate；12, sealant；13, the second through-hole；2, lower sheeting；21, first through hole；22, gap；
3, hard tracheae；4, nut；5, air pump device；6, pressure-regulating valve；7, notch.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
With with reference to the accompanying drawing and specific embodiment the invention will be further described:
1 detection device embodiment of embodiment
Referring to Figures 1 and 2, the present embodiment provides a kind of soft-package battery packaging effect detection device, including upper tabletting 1, under
Tabletting 2, hard tracheae 3, nut 4 and air pump device 5, lower sheeting 2 are equipped with first through hole 21；3 one end of hard tracheae and lower sheeting 1
First through hole 21 be fixedly connected, hard tracheae 3 be lateral wall set threaded hollow pipe fitting；Upper tabletting 1 includes 11 He of substrate
Sealant 12, sealant 12 uniformly stick on 11 lower surface of substrate, and upper tabletting 1 is equipped with the second through-hole 13, for across hard
Matter tracheae 3；Nut 4 is for compressing tabletting 4；Air pump device 5 is connect by gas piping with 3 other end of hard tracheae.
Easily enter in the aluminum plastic film of tested battery core to be connected with the lower sheeting 2 of hard tracheae 3, the lower sheeting 2
For bar shaped thin slice, and it is equipped with gap 22 in the direction of the width, and the gap 22 and first through hole 21 penetrate through.
For the ease of adjusting the size of detection pressure, it is additionally provided with pressure-regulating valve 6 on the gas piping, can also understand and examine
Survey the limit pressure voltage of battery core encapsulation.
In order to enable palette is well air tight during the test for upper tabletting 1 and lower sheeting 2, the sealant 12 is
Silica gel or rubber have the material of elastic packing.
The detection method for the detection device that embodiment 1 provides includes the following steps:
It (1), is 20~25mm notch 7 along the standardized a length of straight line by the aluminum plastic film for encapsulating battery lateral surface；
(2), lower sheeting 2 is put into battery core by notch 7, so that the upper surface of lower sheeting 2 is bonded aluminum plastic film, while hard
Matter tracheae 3 is by notch 7 towards outside battery core；Mobile lower sheeting 2, so that lower sheeting 2 is located at the position that can cover notch 7,
It is preferred that the length direction and cuts parallel of lower sheeting 2 are placed；
(3), the second through-hole 13 of upper tabletting 1 is passed through into hard tracheae 3, so that 12 face paste of sealant of upper tabletting 1 closes aluminium
Plastic film simultaneously covers notch 7, while top board 1 and about 2 lower platen being kept to be arranged in parallel, so that upper tabletting 1 and lower sheeting 2 can
Intact covering notch 7；Nut 4 is passed through hard tracheae 3, and tightening nut 4, tabletting 1 and lower sheeting 2 is made to be tightly engaged into aluminium
Plastic film.
(4), battery core is put into ready pond, and injects limpid, transparent water into pond, water immersion battery core.
(5), gas piping connects the other end and air pump device 5 of hard tracheae 3, opens air pump device 5, slowly will
Air pressure is transferred to different atmospheric pressure values and is detected；When inflating test under every kind of atmospheric pressure value, 5 minutes preferably are stood, sees side seal print portion
Whether position has bubble to emerge, if there is bubble to emerge, judges that the encapsulation of this aluminum plastic film has encapsulation defect, and can directly observe close
Seal Gas leak position.
As a preferred embodiment/embodiment, the position of notch 7 described in step (1) are convenient for upper tabletting 1 and lower sheeting
2 positions placed, such as front and behind or the side etc. of battery core.
As a preferred embodiment/embodiment, lower sheeting 2 described in step (2) are put into the step in battery core by notch 7
It is as follows: lower sheeting 2 is entered into notch 7 in the width direction first, then, and when notch 7 reaches 2 22 position of gap of lower sheeting, edge
22 direction of gap is mobile and rotates, so that lower sheeting 2 fully enters inside battery core, while the hard tracheae 3 passes through 7 court of notch
To the outside of battery core.
As a preferred embodiment/embodiment, after guaranteeing battery core ventilation expansion, battery core can also integrally be immersed in water
In, water immersion battery core height component in step (4) needs at least more than 5 times battery core thickness in the altitude range of pond.
As a preferred embodiment/embodiment, the value of air pressure adjustment is 0.1Mpa, 0.2Mpa, 0.3Mpa in step (5),
0.4Mpa, 0.5Mpa and 0.6Mpa, time of repose are 5 minutes.
In order to verify the detection validity for the detection method for using above-mentioned detection device, for the aluminum plastic film point of encapsulation battery
The method (method one) and detection method (method of the invention of seal thickness, seal colloidal sol and seal pulling force Cai Yong not measured
Two) it is packaged effect detection.
Choose the sample of three classes packaging effect respectively first, the detection of A group sample package thickness meets examination criteria, and test misses
Difference control is in ± 10 μ ms, and for seal appearance without wrinkle phenomenon, gel and tab metal delivery position are seamless；B group sample
The detection of product package thickness meets examination criteria, and test error controls in ± 10 μ ms, and seal appearance has wrinkle phenomenon, tab
Glue and tab metal delivery position are seamless；The detection of C group sample package thickness meets examination criteria, and test error is controlled ± 10
In μ m, for seal appearance without crumpling, gel, without having the gap, is shown in Table one with tab metal delivery position in detail.
Secondly the sample of A group standard selects 3；The sample of B group standard selects 9, respectively corresponds seal appearance and slightly beats
It wrinkles, crumple and seriously crumples three kinds of situations, each case chooses 3 samples；The sample of C group standard selects 3.
Table 1: sample parameters contrast table
Table 2: one testing result contrast table of method
Testing result by method one is as shown in Table 2, from the testing result in table two it is found that being detected by method one
To A group, B group and C group, totally 15 samples are detected respectively, from detection data, are all satisfied requirement, but actual conditions, B
The appearance of group, which crumples to locate to exist, encapsulates not tight risk, and gel has the gap not tight there is also encapsulating with tab metal delivery position
Risk, method one do not detect.
Five detecting steps that method two is respectively adopted below for 15 the above A group, B group and C group samples are detected,
Testing result is as shown in table 3.
Table 3: two testing result contrast table of method
Note: √ is indicated through detection, no gas leak phenomenon；× indicate there is gas leak phenomenon not by detection.
Being using detection device and detection method employed in one embodiment of the present of invention as can be seen from Table III can
Effectively to detect to there is wrinkle and gel and tab metal delivery position to have the gap two kinds of defective products in seal appearance, while from
The pressure voltage of the case where in table it is also seen that for crumpling is 0.4Mpa, and pressure voltage the case where for seriously crumpling is
0.3Mpa is 0.1Mpa for gel and the apertured pressure voltage of tab metal delivery position.
It is detailed introduction of the invention above, specific case used herein is to the principle of the present invention and embodiment party
Formula is expounded, method and core concept of the invention that the above embodiments are only used to help understand.It should refer to
It out, for those skilled in the art, without departing from the principle of the present invention, can also be to the present invention
Some improvement and modification can also be carried out, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims (9)
1. a kind of soft-package battery packaging effect detection device, which is characterized in that including upper tabletting, lower sheeting, hard tracheae, nut
And air pump device,
The lower sheeting is equipped with first through hole, and hard tracheae one end is fixedly connected with the first through hole of lower sheeting；
The hard tracheae is that lateral wall sets threaded hollow pipe fitting；
The upper tabletting includes substrate and sealant, and the sealant uniformly sticks on lower surface, and the upper tabletting is equipped with
Second through-hole, for across hard tracheae；
The nut is for compressing tabletting；
The air pump device is connect by gas piping with the hard tracheae other end.
2. a kind of soft-package battery packaging effect detection device according to claim 1, which is characterized in that the lower sheeting is
Bar shaped thin slice, and it is equipped with gap in the direction of the width, gap and first through hole penetrate through.
3. a kind of soft-package battery packaging effect detection device according to claim 1, which is characterized in that the sealant is
Silica gel or rubber have the material of elastic packing.
4. a kind of soft-package battery packaging effect detection device according to claim 1, which is characterized in that the gas piping
It is equipped with pressure-regulating valve.
5. the detection method of the soft-package battery packaging effect detection device as described in claim 1-4 any one, feature exist
In the detection method step includes:
It (1), is 20~25mm notch along the standardized a length of straight line by the aluminum plastic film for encapsulating battery lateral surface；
(2), the lower sheeting is put into battery core by notch, so that the upper surface of lower sheeting is bonded aluminum plastic film, while described
Hard tracheae is by notch towards outside battery core；Mobile lower sheeting, so that lower sheeting is located at the position that can cover notch；
(3), the second through-hole of the upper tabletting is passed through into hard tracheae, so that the sealant face paste of upper tabletting is closed aluminum plastic film and covered
Lid notch；Nut is passed through hard tracheae and is tightened, tabletting and lower sheeting is made to be tightly engaged into aluminum plastic film；
(4), packaging electric core is put into pond, and the injected clear water into pond, water immersion battery core；
(5), the other end of hard tracheae is connected by gas piping with air pump device, air pump device is opened, slowly by air pressure
Different atmospheric pressure values are transferred to be detected；When inflating test under every kind of atmospheric pressure value, certain time is stood, observation side seal position is
It is no to there is bubble to emerge, if there is bubble to emerge, judge that this aluminum plastic film encapsulates existing defects.
6. detection method according to claim 5, which is characterized in that the position of notch described in step (1) is convenient for upper
The position that tabletting and lower sheeting are placed is front and behind or the side of battery core.
7. detection method according to claim 5, which is characterized in that lower sheeting described in step (2) is put by notch
Step in battery core is as follows:
Lower sheeting is entered into notch in the width direction first；Then, when notch reaches lower sheeting gap position, along gap direction
Move and rotate so that lower sheeting fully enters inside battery core, while the hard tracheae by notch towards outside battery core.
8. detection method according to claim 5, which is characterized in that water immersion battery core height component in the step (4),
In the altitude range in pond, at least more than 5 times battery core thickness.
9. detection method according to claim 5, which is characterized in that in the step (5) value of air pressure adjustment be 0.1~
0.6Mpa。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910257686.5A CN110068762A (en) | 2019-04-01 | 2019-04-01 | Soft-package battery packaging effect detection device and detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910257686.5A CN110068762A (en) | 2019-04-01 | 2019-04-01 | Soft-package battery packaging effect detection device and detection method |
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| CN110068762A true CN110068762A (en) | 2019-07-30 |
Family
ID=67366836
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| CN201910257686.5A Pending CN110068762A (en) | 2019-04-01 | 2019-04-01 | Soft-package battery packaging effect detection device and detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110534831A (en) * | 2019-08-12 | 2019-12-03 | 清华大学 | Internal temperature of battery measurement method |
| CN111735707A (en) * | 2020-06-29 | 2020-10-02 | 天津市捷威动力工业有限公司 | Method and device for testing packaging strength of lithium ion soft package battery |
| CN111751221A (en) * | 2020-06-29 | 2020-10-09 | 苏州清陶新能源科技有限公司 | Method for testing packaging strength of soft package battery |
| CN111879618A (en) * | 2020-07-09 | 2020-11-03 | 合肥国轩高科动力能源有限公司 | Method for testing withstand pressure of soft-packaged battery cell |
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| CN111879618A (en) * | 2020-07-09 | 2020-11-03 | 合肥国轩高科动力能源有限公司 | Method for testing withstand pressure of soft-packaged battery cell |
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