CN106733717B - A method of detection soft package lithium battery is damaged - Google Patents

A method of detection soft package lithium battery is damaged Download PDF

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Publication number
CN106733717B
CN106733717B CN201611229209.0A CN201611229209A CN106733717B CN 106733717 B CN106733717 B CN 106733717B CN 201611229209 A CN201611229209 A CN 201611229209A CN 106733717 B CN106733717 B CN 106733717B
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lithium battery
detection case
area
detection
transverse tube
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CN106733717A (en
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梁水塘
任宁
吴耀辉
孙延先
樊海英
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ZHEJIANG CHAOWEI CHUANGYUAN INDUSTRIAL Co Ltd
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ZHEJIANG CHAOWEI CHUANGYUAN INDUSTRIAL Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07CPOSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34Sorting according to other particular properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07CPOSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/02Measures preceding sorting, e.g. arranging articles in a stream orientating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07CPOSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/36Sorting apparatus characterised by the means used for distribution

Abstract

The invention discloses a kind of methods for detecting soft package lithium battery breakage, include the following steps: that a. testing staff first carries out Preliminary detection to lithium battery, the lithium battery for the badly broken for wherein having electrolyte to leak is chosen, and stick rejected product mark, then it is included into NonConforming Parts Area, for the lithium battery of unobvious damaged trace, then area to be detected is included into;B. the lithium battery in area to be detected is put into a sealable detection case in constant temperature and humidity state, the temperature of detection case controls between 55-65 DEG C, and relative humidity controls between 93%-97%;C. from after 46-50 hour, taking out lithium battery out of detection case and carrying out, the lithium battery for bulging phenomenon wherein occur is sticked into rejected product mark, and be included into NonConforming Parts Area, remaining lithium battery is then included into qualified product area.The present invention efficiently reduces erroneous judgement in lithium battery damage testing, phenomenon of failing to judge, and is conducive to the quality stability for improving lithium battery, and improve detection efficiency, reduces testing cost.

Description

A method of detection soft package lithium battery is damaged
Technical field
The present invention relates to aluminum plastic film soft-package battery technical fields, are suitable for soft-package battery production process more particularly, to one kind The method of middle detection soft package lithium battery breakage.
Background technique
Aluminum plastic film soft-package battery ratio shared in power battery is higher and higher, and the encapsulation of soft-package battery is usually with envelope The opening of laminated aluminum film bag is carried out packaging by hot pressing completion by installation, for example, one kind disclosed " lithium in Chinese patent literature The packaging system of cell aluminum-plastic membrane ", notification number CN205376586U including fixed part and are set on the fixed part Nip portion, is provided with the fixed hole passed through for fastener on the fixed part, and the top surface of the nip portion is and aluminum plastic film phase The stitching surface of contact, be provided on the stitching surface it is several it is spaced apart transversely or the oblique air guide through the nip portion Slot.The air slot through nip portion is arranged in the utility model on the stitching surface of packaging system, can be by aluminium in encapsulation process The gas of the generations such as plastic film or electrolyte is discharged, and reduces the air pressure that aluminum plastic film is born and the generation for avoiding stomata, to subtract Few empty envelope.However, there is also a problems for aluminum plastic film soft-package battery, during production and transport, battery often with other objects Product contact and generate friction, so that breakage is caused, in particular, the friction at two angles of battery bottom can be than more serious, therefore, especially It is easy to generate tiny damaged hole or gap because of abrasion.Thus, it would be desirable to damage testing is carried out to soft-package battery, to prevent Damaged battery comes into the market.It however is mainly in the prior art the mesh for relying on testing staff to the damage testing of soft package lithium battery Completion is surveyed, for most damaged more serious lithium batteries, testing staff more convenient can accurately be judged, but It is, for the lithium battery of some little damages, since its damaged hole or gap are as tiny, only according to visually observing very Difficulty makes accurate judgement, to be easy to appear erroneous judgement, fail to judge, to influence the quality of lithium battery product, while being unfavorable for improving Detection efficiency increases testing cost.
Summary of the invention
The purpose of the present invention is to solve be easy to appear mistake present in existing soft package lithium battery damage testing method Sentence, fail to judge the problem of influencing product quality, a kind of method detecting soft package lithium battery breakage is provided, can be efficiently reduced Erroneous judgement, phenomenon of failing to judge in lithium battery damage testing are conducive to the quality stability for improving lithium battery, and improve detection efficiency, Reduce testing cost.
To achieve the goals above, the invention adopts the following technical scheme:
A method of detection soft package lithium battery is damaged, includes the following steps:
A. testing staff first carries out Preliminary detection to lithium battery, by the lithium electricity for the badly broken for wherein having electrolyte to leak Pond is chosen, and sticks rejected product mark, is then included into NonConforming Parts Area, for the lithium battery of unobvious damaged trace, then It is included into area to be detected;
B. the lithium battery in area to be detected is put into a sealable detection case in constant temperature and humidity state, is detected The temperature of case controls between 55-65 DEG C, and relative humidity controls between 93%-97%;
C. from after 46-50 hour, taking out lithium battery out of detection case and carrying out, bulging will wherein occur and show The lithium battery of elephant sticks rejected product mark, and is included into NonConforming Parts Area, remaining lithium battery is then included into qualified product area.
The lithium battery of badly broken can conveniently and efficiently be observed by the naked eye by testing staff and be picked out, and is directly included into NonConforming Parts Area, and be difficult to observe by the naked eye resolution for some, be confirmed whether the lithium battery for having damaged, then it can be put into constant temperature Secondary detection is carried out in the detection case of constant humidity, since the relative humidity in detection case is larger, lithium battery is passing through two days left sides After the right processing time, the steam in detection case can enter the lithium battery interior for having subtle breakage, thus with lithium battery interior Organic electrolyte reacts and generates gas, and lithium battery at this time just will appear bulging phenomenon, so as to be facilitated area It branches away, and intact lithium battery is then not in bulging phenomenon, therefore be can determine that as qualified product.That is, present invention benefit The characteristics of water can react and generate bulk gas is met with the organic electrolyte of lithium battery, and then the shape by detecting lithium battery is It is no bulging occur and the damaged state of lithium battery is judged indirectly, therefore the accuracy of detection can be increased, it efficiently reduces Erroneous judgement, phenomenon of failing to judge in lithium battery damage testing are conducive to the quality stability for improving lithium battery.In addition, can in detection case Multiple lithium batteries are disposably put into, thus detection efficiency can be improved, reduce testing cost.
Preferably, being equipped with several detection boxes in the detection case, detection case is connected with compression gas pipe, in stepb, First the lithium battery in area to be detected is sequentially placed into each detection box of detection case, then seals detection case, and pass through compressed gas Pipe inputs compressed air into detection case, so that the air pressure in detection case is maintained between 0.12-0.14 megapascal 30-60 minutes, so After so that detection case is entered constant temperature and humidity state;It is small after 46-50 hour, making detection case seal cooling 1-2 in step c When, from then taking-up lithium battery carries out out of detection case, the lithium battery for bulging phenomenon wherein occur is sticked into rejected product mark Know, and be included into NonConforming Parts Area, the surface of remaining lithium battery is then wiped with PH test paper, if PH test paper changes colour, by the lithium Battery sticks rejected product mark, and is included into NonConforming Parts Area, if PH test paper is non-discolouring, which is included into qualified product Area.
Due to the extremely subtle lithium battery of some breakages, damaged hole or gap may be in closed state, Therefore damp and hot air can be relatively difficult when entering lithium battery interior, and therefore, the bulging phenomenon of lithium battery can be unobvious, thus Influence the accurate judgement of testing staff.In the present solution, increase into detection case input compressed air auxiliary program, this Sample, for lithium battery under the squeezing action by compressed air, script is in the subtle damaged hole or gap of closed state It can correspondingly expand, the organic electrolyte of lithium battery interior is adsorbed on the surface of lithium battery there will be a small amount of leakage.Due to The electrolyte of leakage is in acidity substantially, and therefore, when testing staff wipes lithium battery surface with PH test paper, PH test paper can be correspondingly Discoloration, so as to easily and accurately judge that there is the lithium battery of subtle breakage.
Preferably, being equipped with several detection boxes in the detection case, detection case is connected with compression gas pipe, in stepb, First the lithium battery in area to be detected is sequentially placed into each detection box of detection case, and makes top court of the lithium battery equipped with tab On, distilled water then is injected in detection box, is immersed in the bottom of lithium battery in distilled water, then sealing detection case, and lead to Overcompression tracheae inputs compressed air into detection case, and the air pressure in detection case is made to maintain 30-60 between 0.12-0.14 megapascal Minute, so that detection case is entered constant temperature and humidity state;In step c, after 46-50 hour, taken out out of detection box Lithium battery is observed, and the lithium battery for bulging phenomenon wherein occur is sticked rejected product mark, and be included into NonConforming Parts Area, so Corresponding lithium battery is pasted if PH test paper changes colour with the distilled water that PH test paper is tested in the detection box of remaining lithium battery afterwards Upper rejected product mark, and it is included into NonConforming Parts Area, if PH test paper is non-discolouring, corresponding lithium battery is included into qualified product Area.
Unlike aforementioned schemes, we can inject distilled water in detection box, in this way, when compressed air makes lithium battery When internal organic electrolyte leaks out on a small quantity, electrolyte can incorporate in distilled water, and therefore, we are convenient to survey by PH test paper The acid-base property of distilled water is tried, to confirm the breakage of lithium battery, is conducive to the efficiency for improving detection.
Preferably, being equipped with several detection boxes in the detection case, detection box is equipped with dismountable sealing cover, sealing cover It is equipped with snorkel, the snorkel includes the vertical straight tube being connected to detection box and the water being connected on the side wall of straight tube Flat transverse tube, transverse tube one end are connected to straight tube, another end opening, are vertically equipped on the upside of the middle part of transverse tube and are connected to transverse tube Minim pipette is equipped with seal cap at the upper end opening of straight tube and the lithium battery in area to be detected is first sequentially placed into inspection in stepb In each detection box of measuring tank, sealing cover is then covered, and remove the seal cap of straight tube upper end, when the temperature in detection case and relatively When humidity reaches setting value, chromonic is instilled into the minim pipette of snorkel with dropper, chromonic enters in transverse tube and seals The junction of minim pipette and transverse tube is blocked up, then the seal cap on straight tube upper end cover;In step c, the sealing cover of test chamber is observed Chromonic in upper lateral tube, if chromonic is mobile to the opening side of transverse tube at this time, the junction of minim pipette and transverse tube It is open-minded, then the lithium battery in test chamber is taken out, which is sticked into rejected product mark, and be classified to NonConforming Parts Area, If position of the chromonic in transverse tube is constant and blocks the junction of minim pipette and transverse tube, the lithium electricity in test chamber is taken out Pond, and it is classified to qualified product area.
Since the caliber of transverse tube is thinner, chromonic can be stably positioned in the junction of minim pipette and transverse tube, if Lithium battery in detection box has extremely slight breakage, and after about two days or so processing time, lithium battery is had slightly Bulging pushed so as to pass through straight tube at this point, have a slight compression with the air in the detection box of seal cap sealing Chromonic in traversing is mobile towards opening side, and testing staff very convenient can clearly judge lithium battery at this time Breakage.And qualified lithium battery is due to having any bulging phenomenon, chromonic can maintain original always Position.It should be noted that the caliber due to transverse tube is thinner, micro compression of the lithium battery to gas in detection case Chromonic is set to generate an apparent displacement, that is to say, that the bulging of lithium battery has obtained the effect of an amplification, thus just In the lithium battery for accurately distinguishing qualification and the lithium battery with pole little damage.
Preferably, the middle part of the transverse tube, which corresponds to, is equipped with reclinate arc liquid storage section at minim pipette, in step b In, when instilling chromonic into the minim pipette of snorkel with dropper, chromonic is full of arc liquid storage section and blocks minim pipette With the junction of transverse tube.
Reclinate arc liquid storage section is equipped at minim pipette since the middle part in transverse tube corresponds to, pass through minim pipette The chromonic of instillation, which can be stored up steadily, to be stayed in arc liquid storage section, and chromonic is voluntarily caused by avoiding because of inclination of transverse tube etc. Displacement, to can avoid erroneous judgement.
Therefore, the invention has the following beneficial effects: the erroneous judgement efficiently reduced in lithium battery damage testing, fail to judge it is existing As being conducive to the quality stability for improving lithium battery, and improve detection efficiency, reducing testing cost.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of snorkel of the present invention.
Fig. 2 is another structural schematic diagram of snorkel of the present invention.
In figure: 1, snorkel 11, straight tube 12, transverse tube 13, minim pipette 14, arc liquid storage section 2, seal cap 3, chromonic.
Specific embodiment
The present invention will be further described with specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, a kind of method for detecting soft package lithium battery breakage, includes the following steps:
A. testing staff first carries out Preliminary detection to lithium battery, by the lithium electricity for the badly broken for wherein having electrolyte to leak Pond is chosen, and sticks rejected product mark, is then included into NonConforming Parts Area, for the lithium battery of unobvious damaged trace, then It is included into area to be detected.It should be noted that the detection due to step a is a preliminary differentiation, it is wherein may be used by purpose Damaged lithium battery is positively acknowledged by very much to choose, to reduce the workload of subsequent detection program, therefore for it is some not It can clearly determine whether that damaged lithium battery can be included into area to be detected into subsequent detection, to avoid judging by accident and failing to judge as far as possible;
B. the lithium battery in area to be detected is put into a sealable detection case in constant temperature and humidity state, is detected The temperature of case controls between 55-65 DEG C, and relative humidity controls between 93%-97%;
C. after 46-50 hour, the steam in detection case can enter the lithium battery interior for having subtle breakage, from And react with the organic electrolyte of lithium battery interior and generate gas, lithium battery at this time just will appear bulging phenomenon, and Damaged lithium battery is not then not in bulging phenomenon for remaining.Therefore, we can take out lithium battery out of detection case and see It examines, the lithium battery for bulging phenomenon wherein occur is sticked into rejected product mark, and be included into NonConforming Parts Area, remaining is not had into bulging Lithium battery be included into qualified product area.
For the ease of making accurate judgement to some lithium batteries with superfine micro- damaged hole or gap, we can be right The above method carries out three kinds of adjustment, and specifically, the first method of adjustment is as follows: several detection boxes being arranged in detection case, detect The arrangement of box rectangular array, detection case are connected with the compression gas pipe that can input compressed air.In this way, in stepb, Wo Menke First the lithium battery in area to be detected is sequentially placed into each detection box of detection case, then seals detection case, and pass through compressed gas Pipe inputs compressed air into detection case, maintains the air pressure in detection case between 0.12-0.14 megapascal 30-60 minutes, tool There are superfine micro- damaged hole or the lithium battery in gap under the squeezing action by compressed air, script is in closed state Subtle damaged hole or gap can correspondingly be expanded, and the organic electrolyte of lithium battery interior is adsorbed there will be a small amount of leakage On the surface of lithium battery.Then so that detection case is entered constant temperature and humidity state, and enter step c;In step c, by 46-50 After hour, it is further added by a cooling program, detection case is made to cool down 1-2 hours in sealed states to room temperature, at this time lithium battery Surface can adsorb one layer from the water being condensed out in damp-heat air in detection case, then take out lithium battery out of detection case and seen It examines, the lithium battery for obvious bulging phenomenon wherein occur is sticked into rejected product mark, and be included into NonConforming Parts Area, and remaining lithium Battery then can be used PH test paper to wipe its surface, if the lithium battery has slight breakage, the water and leakage that surface condensation goes out Electrolyte be formed with acid dilute electrolyte, therefore PH test paper can change colour, and testing staff can stick the lithium battery not Qualified product mark, and it is included into NonConforming Parts Area, if PH test paper is non-discolouring, illustrate the no breakage of the lithium battery, thus should Lithium battery is included into qualified product area.
It should be noted that we can correspondingly replace inspection when the electrolyte for detecting the lithium battery in box has leakage Box is surveyed, in order to avoid subsequent detection is impacted by the detection box of electrolyte contamination.
In addition, second of method of adjustment is as follows: several detection boxes, detection box rectangular array row being arranged in detection case Cloth, detection case are connected with the compression gas pipe that can input compressed air.In this way, in stepb, we can be first by area to be detected Lithium battery is sequentially placed into each detection box of detection case, and the top for making lithium battery be equipped with tab is upward, is then detecting box Interior injection distilled water, is immersed in the bottom of lithium battery in distilled water, then sealing detection case, and passes through compression gas pipe to detection Compressed air is inputted in case, maintains the air pressure in detection case between 0.12-0.14 megapascal 30-60 minutes, is had superfine micro- Under the squeezing action by compressed air, script is in the subtle of closed state and breaks for damaged hole or the lithium battery in gap Damage hole or gap can correspondingly be expanded, and the organic electrolyte of lithium battery interior is merged there will be a small amount of leakage with distilled water Together, to make distilled water in acidity.Then so that detection case is entered constant temperature and humidity state, and enter step c;In step c, After 46-50 hour, from taking-up lithium battery carries out out of detection box, the lithium battery of obvious bulging phenomenon will wherein occur Rejected product mark is sticked, and is included into NonConforming Parts Area, the distillation in the detection box of remaining lithium battery is then tested with PH test paper Water illustrates that the lithium battery in the detection box has breakage if PH test paper changes colour, we need to only stick the lithium battery unqualified Product mark, and it is included into NonConforming Parts Area, if PH test paper is non-discolouring, illustrate the no breakage of lithium battery in the detection box, I The lithium battery only need to be included into qualified product area.
It should be noted that since the amount of the electrolyte of leakage is less, we can make the inner cavity for detecting box and lithium electricity The shape in pond is coincide substantially, thus reduce the amount of distilled water in detection box to the greatest extent, so that it is guaranteed that distilled water has enough acidity, In order to be detected by PH test paper.
In addition, the third method of adjustment is as follows: several detection boxes of setting in detection case, detection box rectangular array arrangement, Dismountable sealing cover is set on detection box, snorkel is set on sealing cover.As shown in Figure 1, snorkel 1 includes connecting with detection box Logical vertical straight tube 11 and the horizontal transverse tube 12 being connected on the side wall of straight tube, transverse tube one end is connected to straight tube, another The minim pipette 13 being connected to transverse tube is vertically arranged in end opening on the upside of the middle part of transverse tube, is arranged at the upper end opening of straight tube One dismountable seal cap 2.In this way, in stepb, the lithium battery in area to be detected first can be sequentially placed into detection case by us In each detection box, sealing cover is then covered, and remove the seal cap of straight tube upper end.When in detection case temperature and relative humidity reach When to setting value, chromonic 3 is instilled into the minim pipette of snorkel with dropper, it is preferable that the color of chromonic is red, Chromonic enters in transverse tube and blocks the junction of minim pipette and transverse tube, and then the seal cap on straight tube upper end cover, whole at this time A snorkel only has the open at one end of transverse tube, and the air pressure of the left and right sides of the chromonic in transverse tube keeps balance, therefore caliber The chromonic of thinner transverse tube can be stably positioned in the junction of minim pipette and transverse tube, can then enter step c;In step In c, observe the position of the chromonic in the sealing cover upper lateral tube of test chamber, if detection box in lithium battery have it is extremely slight Breakage, lithium battery at this time have slight bulging, at this point, having one slightly with the air in the detection box of seal cap sealing Compression, so as to push the chromonic in traversing mobile towards opening side by straight tube, until minim pipette and transverse tube Junction is open-minded, and air can be discharged by minim pipette, to avoid chromonic Outlet horizontal pipe, test can be taken off examining Intracavitary lithium battery is surveyed, which is sticked into rejected product mark, and be classified to NonConforming Parts Area., whereas if coloured Position of the drop in transverse tube is constant and blocks the junction of minim pipette and transverse tube, then proves that the lithium battery in detection box is that do not have The qualified product of bulging occurs, therefore, we can be taken off the lithium battery in test chamber, and be classified to qualified product area.
It almost can be ignored it is understood that the volume of transverse tube is compared with the volume of lithium battery, correspondingly, have Damaged lithium battery increased volume after bulging wants big manyfold compared with the volume of transverse tube, therefore, even if lithium battery is only Naked eyes are not easy the micro bulging realized, can make the chromonic transverse shifting in transverse tube.Certainly, for the ease of observing, we It can make the chromonic in transverse tube that there is enough length, and as far as possible be in chromonic and traverse interior close straight tube side, this Sample can push chromonic mobile to the opening side of transverse tube when lithium battery bulging, until chromonic transverse shifting is got over Cross the junction with minim pipette.
Further, as shown in Fig. 2, we can correspond at the middle part of transverse tube is arranged the arc of downward arc-shaped bend at minim pipette Shape liquid storage section 14, in this way, in stepb, when instilling chromonic into the minim pipette of snorkel with dropper, chromonic meeting The junction of minim pipette and transverse tube is steadily remained in arc liquid storage section and blocks, it is coloured caused by avoiding because of inclination of transverse tube etc. The voluntarily displacement of drop, to can avoid erroneous judgement.

Claims (4)

1. a kind of method for detecting soft package lithium battery breakage, characterized in that include the following steps:
A. testing staff first carries out Preliminary detection to lithium battery, and the lithium battery for the badly broken for wherein having electrolyte to leak is chosen Out, and rejected product mark is sticked, is then included into NonConforming Parts Area, for the lithium battery of unobvious damaged trace, be then included into Area to be detected;
B., the lithium battery in area to be detected is first sequentially placed into each inspection of a sealable detection case in constant temperature and humidity state It surveys in box, detection case is connected with compression gas pipe, then seals detection case, and input pressure into detection case by compression gas pipe Contracting air maintains the air pressure in detection case between 0.12-0.14 megapascal 30-60 minutes, then detection case is made to enter constant temperature The temperature of humidity constant state, detection case controls between 55-65 DEG C, and relative humidity controls between 93%-97%;
C. after 46-50 hour, make cooling 1-2 hour of detection case sealing, then out of detection case taking-up lithium battery into The lithium battery for bulging phenomenon wherein occur is sticked rejected product mark, and is included into NonConforming Parts Area by row observation, is then tried with PH Paper wipes the surface of remaining lithium battery, if PH test paper changes colour, which is sticked rejected product mark, and be included into and do not conform to The lithium battery is included into qualified product area if PH test paper is non-discolouring in the area Ge Pin.
2. a kind of method for detecting soft package lithium battery breakage, characterized in that include the following steps:
A. testing staff first carries out Preliminary detection to lithium battery, and the lithium battery for the badly broken for wherein having electrolyte to leak is chosen Out, and rejected product mark is sticked, is then included into NonConforming Parts Area, for the lithium battery of unobvious damaged trace, be then included into Area to be detected;
B., the lithium battery in area to be detected is first sequentially placed into each inspection of a sealable detection case in constant temperature and humidity state It surveys in box, detection case is connected with compression gas pipe, and the top for making lithium battery be equipped with tab is upward, then infuses in detection box Enter distilled water, be immersed in the bottom of lithium battery in distilled water, then sealing detection case, and through compression gas pipe into detection case Input compressed air, maintain the air pressure in detection case between 0.12-0.14 megapascal 30-60 minutes, then make detection case into Enter constant temperature and humidity state, the temperature of detection case controls between 55-65 DEG C, and relative humidity controls between 93%-97%;
C. from after 46-50 hour, taking out lithium battery out of detection case and carrying out, bulging phenomenon will wherein occur Lithium battery sticks rejected product mark, and is included into NonConforming Parts Area, is then tested in the detection box of remaining lithium battery with PH test paper Distilled water corresponding lithium battery is sticked into rejected product mark, and is included into NonConforming Parts Area, such as if PH test paper changes colour Fruit PH test paper is non-discolouring, then corresponding lithium battery is included into qualified product area.
3. a kind of method for detecting soft package lithium battery breakage, characterized in that include the following steps:
A. testing staff first carries out Preliminary detection to lithium battery, and the lithium battery for the badly broken for wherein having electrolyte to leak is chosen Out, and rejected product mark is sticked, is then included into NonConforming Parts Area, for the lithium battery of unobvious damaged trace, be then included into Area to be detected;
B., the lithium battery in area to be detected is first sequentially placed into each inspection of a sealable detection case in constant temperature and humidity state It surveys in box, the temperature of detection case controls between 55-65 DEG C, and relative humidity controls between 93%-97%, sets on the detection box Have dismountable sealing cover, sealing cover is equipped with snorkel, the snorkel include with detect the vertical straight tube that box is connected to And it is connected to the horizontal transverse tube on the side wall of straight tube, transverse tube one end is connected to straight tube, another end opening, on the middle part of transverse tube Side is vertically equipped with the minim pipette being connected to transverse tube, and seal cap is equipped at the upper end opening of straight tube, then covers sealing cover, and The seal cap for removing straight tube upper end, when in detection case temperature and relative humidity reach setting value when, with dropper to snorkel Chromonic is instilled in minim pipette, chromonic enters in transverse tube and blocks the junction of minim pipette and transverse tube, then in straight tube Seal cap on upper end cover;
C. then observation detects the chromonic in the sealing cover upper lateral tube of box, if opening of the chromonic to transverse tube at this time Side is mobile, and the junction of minim pipette and transverse tube is open-minded, then takes out the lithium battery in test chamber, which is sticked unqualified Product mark, and it is classified to NonConforming Parts Area, if position of the chromonic in transverse tube is constant and blocks minim pipette and transverse tube Junction, then take out the lithium battery in detection box, and be classified to qualified product area.
4. a kind of method for detecting soft package lithium battery breakage according to claim 3, characterized in that the middle part of the transverse tube Reclinate arc liquid storage section is equipped at corresponding minim pipette, in stepb, when being instilled with dropper into the minim pipette of snorkel Chromonic, chromonic are full of arc liquid storage section and block the junction of minim pipette and transverse tube.
CN201611229209.0A 2016-12-27 2016-12-27 A method of detection soft package lithium battery is damaged Active CN106733717B (en)

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