CN105355994B - A kind of safety valve degradation detecting method and detecting tool for lead-acid accumulator - Google Patents
A kind of safety valve degradation detecting method and detecting tool for lead-acid accumulator Download PDFInfo
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- CN105355994B CN105355994B CN201510724644.XA CN201510724644A CN105355994B CN 105355994 B CN105355994 B CN 105355994B CN 201510724644 A CN201510724644 A CN 201510724644A CN 105355994 B CN105355994 B CN 105355994B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
A kind of safety valve degradation detecting method and detecting tool for lead-acid accumulator, the detection method extract six as detection exemplar from the safety valve of a batch at random；Each detection exemplar is installed on the valve seat of detecting tool, measures one by one and records the cracking pressure before its aging and valve closing pressure；Detection exemplar is removed from valve seat, sulfuric acid solution is smeared in each detection exemplar inwall, then reinstalls to each detection exemplar on valve seat；Each single lattice of detecting tool is evacuated to 15kPa；Room temperature is cooled to after detecting tool is placed five days at a temperature of 60 DEG C；Measure one by one and record first time cracking pressure and cracking pressure and valve closing pressure after each detection exemplar aging；Determined according to testing result.The inventive method can be prevented unqualified safety valve to greatest extent and used on battery, avoided because the failure of safety valve premature aging causes battery cycle life to terminate in advance with objective, true, accurate reaction safety valve ageing properties.
Description
Technical field
The present invention relates to a kind of detection method, particularly for the safety valve degradation detecting method of lead-acid accumulator and detection
Frock, battery technology field.
Background technology
Safety valve is one of lead-acid accumulator critical component, and at the top of lead-acid accumulator, its main function is：1st, it is close
Envelope is acted on, and when accumulator internal pressure is less than the valve closing pressure of safety valve, safety valve is closed, and prevents air from entering pole group and aoxidizing negative pole
Plate, cause battery capacity to decline, while be also prevented from internal gas acid mist toward outward leakage.2nd, safety effect, when battery used
When gas atmosphere reaches safety valve pressure caused by inside in journey, safety valve open pressure is discharged, prevent cell deformation,
Rupture.3rd, ensure battery normal air pressure, promote oxygen in battery compound, reduce dehydration.When safe defective valve can not be normal
During reset, the oxygen combined efficiency of valve controlling type accumulator can be caused to substantially reduce, cause electrolyte solution loss, so as to cause circulating battery
Life-span terminates in advance.There is experiment to show, battery cycle life premature failure is caused as safe defective valve shared by ratio it is suitable
Greatly.Therefore ageing management of the enterprise in process of production to safety valve is highly important link.Make the main material of safety valve
Matter is ethylene propylene diene rubber, and the rubber is acidproof, resistance to oxidation, thermal stability are superior, but price is higher.To reduce material cost,
Partial security valve reduces ethylene propylene diene rubber dosage in the market, or makes safety valve, this safety using General Purpose Rubber
Valve is using initial performance normal, but acid resistance, stability are poor, and service life is short.The safety valve aging inspection being commonly used
Survey method is to use pickling method, will be detected safety valve and immerse in acid solution, be taken after being kept for a period of time at a certain temperature
Go out to determine its open and close valve pressure, whether determined according to open and close valve pressure qualified by safety valve.Existing for this traditional detection method
Problem is：1st, safety valve using when tip upside down on valve seat, acted on for a long time by mechanical stress, its ageing process can be accelerated, and
Pickling detection method can not embody said process；2nd, the cell negative terminal inner most time is in negative pressure shape when battery uses
State, safety valve are close on valve seat, are likely to occur the adhesion phenomenon of valve body and valve seat by suction function for a long time, make safety valve without
Method is opened or Opening pressure is excessive, and to be also pickling detection method can not simulate negative pressure state.Based on above-mentioned factor, cause to pass
System safety valve degradation detecting method is unable to actual response safety valve ageing state, part substandard product is examined by aging
Survey is used on battery, and its result causes the cycle life of battery to substantially reduce, or even causes battery bulge, blast etc.
Serious accident.
The content of the invention
It is an object of the invention to the drawback for prior art, there is provided one kind is under the conditions of simulating Safety valve use state
Ageing management is carried out, so as to improve the safety valve ageing management for lead-acid accumulator of the accuracy of testing result and reliability
Method and detecting tool.
Problem of the present invention is realized with following technical proposals：
A kind of safety valve degradation detecting method for lead-acid accumulator, carried out according to the following steps：
A, six are extracted as detection exemplar from the safety valve of a batch at random；
B, six detection exemplars are installed on the valve seat of detecting tool, measure one by one and record each detection exemplar aging
Preceding cracking pressure and valve closing pressure；
C, six detection exemplars are removed from the valve seat of detecting tool, uniformly smeared in the valve interior wall of each safety valve
Sulfuric acid solution, then each detection exemplar is reinstalled on battery cap valve seat；
D, each single lattice of detecting tool is evacuated to -15kPa；
Detecting tool is placed at a temperature of 60 DEG C to five angels detect e, and detecting tool is cooled to room after exemplar aging
Temperature；
F, measure one by one and record first time cracking pressure and cracking pressure and valve closing pressure after each detection exemplar aging；
G, exemplar is detected to judge：After the first time cracking pressure of each detection exemplar after aging is no more than 40 kPa and aging
The cracking pressure of each detection exemplar compare aging with valve closing pressure before cracking pressure and valve closing pressure changing value be not more than ±
5kPa, then judge that the batch safety valve is qualified；If detecting substandard product in six detected detection exemplars, need
Double sampling to recheck according to the method described above, reinspection exemplar is all qualified, then this batch safety valve is qualified, and reinspection still has unqualified sample
Part, then it is determined as that this batch safety valve is unqualified.
The above-mentioned safety valve degradation detecting method for lead-acid accumulator, detect in exemplar ageing process and monitor detecting tool
It the atmospheric pressure value of each single lattice, when pressure change is less than 1kPa/ days, can continue to test, otherwise judge detecting tool seal failure, examine
Survey and terminate.
The above-mentioned safety valve degradation detecting method for lead-acid accumulator, it is applied to the sulfuric acid of the valve interior wall of each safety valve
Solution density is 1.4g/cm3。
A kind of detecting tool of safety valve ageing management for lead-acid accumulator, including seal against each other the battery of bonding
Lid and accumulator housing, accumulator housing are provided with six single lattices, six single lattices after battery cap and accumulator housing bond side by side
Between close each other, battery cap corresponds to the valve seat for being communicated with the single lattice at each single lattice respectively, corresponding on battery cap
Air gauge mounting hole and sebific duct mounting hole are set respectively at each single lattice, air gauge, each sebific duct are assembled on each air gauge mounting hole
Sebific duct is assembled at mounting hole, each sebific duct is provided with valve.
The above-mentioned safety valve ageing management frock for lead-acid accumulator, the air gauge difference of adjacent single lattice on battery cap
It is arranged on the not homonymy of battery cap；The sebific duct of adjacent single lattice is arranged on the not homonymy of battery cap.
The above-mentioned safety valve ageing management frock for lead-acid accumulator, the air gauge are Bidirectional gas pressure table.
The problem of present invention does not meet safety valve use state for testing conditions in conventional security valve ageing management is carried out
Improve, operating pressure, working condition simulating Safety valve according to safety valve use process, under safety valve simulation use state
Carry out ageing management.Methods described can be with objective, true, accurate reaction safety valve ageing properties, compared to existing method of testing
With accuracy, reliability is high the characteristics of.Unqualified safety valve can be prevented to greatest extent using the inventive method and use storage
On battery, avoid because the failure of safety valve premature aging causes battery cycle life to terminate in advance.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of detecting tool of the present invention；
Fig. 2 is Fig. 1 top view；
Fig. 3 is the schematic diagram of safety valve（Not in scale）.
Each list of reference numerals is in figure：1st, accumulator housing, 1-1, the first single lattice, 2, battery cap, 3, valve, 4, sebific duct,
5th, air gauge, 6, air gauge mounting hole, 7, sebific duct mounting hole, 8, valve seat, 9, terminal hole, 10, safety valve.
Embodiment
Safety valve is rubber, and its structure is as shown in Figure 3.The mounting means of safety valve is to detain it by interference fit
On valve seat, cover plate is welded on air flue, 0.5mm or so distance is kept at the top of safety valve with top cover plate, when in the group of pole
When portion's pressure is excessive, safety valve slides up to cover plate position, and safety valve bottom, which is opened, deflates, when air pressure reduces to a certain extent
When, safety valve is closed.In safety valve ager process, performance is gradually reduced, and use value is also progressively lost.On the one hand it is due to
Safety valve is acted on by mechanical stress for a long time, accelerates the aging of rubber；On the other hand, battery is in use in single lattice
Portion's most of the time is in negative pressure state, and safety valve is close on valve seat, it is possible to the adhesion of valve body and valve seat occurs；Particularly
Sulfuric acid makes rubber macromolecule chain structure that chemical change occur under long term high temperature environment, destroys the original chemical constitution of material, from
And cause the change of safety valve physical property and chemical property.The ageing failure of safety valve, it is mainly shown as that rubber is hardened, elasticity
Decline, open and close valve pressure change, therefore, degradation is carried out to safety valve in normal inspection, detect substandard product, right and wrong
It is often necessary.Conventional test methods are that safety valve is immersed in acid, are placed in certain hot environment, after being kept for certain time,
Take out, test open and close valve pressure, evaluate its performance.Due to lacking mechanical stress effect and condition of negative pressure, test result can not be accurate
The really degree of aging of reaction safety valve.In view of the above-mentioned problems, the present invention is improved, safety valve is acted in mechanical stress,
Ageing management, objective, true, accurate reaction safety valve ageing properties are carried out under condition of negative pressure and acid solution environment.
Detecting tool of the pre-production for safety valve ageing management is wanted using the inventive method.It is described referring to Fig. 1, Fig. 2
Detecting tool, including the battery cap 2 and accumulator housing 1 of bonding are sealed against each other, corresponded on battery cap at each single lattice
Respectively set can Matching installation be detected safety valve valve seat 8, each valve seat respectively with its corresponding to single lattice connect.Battery jar
Six single lattices are provided with vivo, and mutually isolation closing between six single lattices after battery cap and accumulator housing bond, each single lattice is only
There is valve seat to be communicated with the external world.Corresponded on battery cap and process an air gauge mounting hole 6 and a glue at each single lattice respectively
Pipe mounting hole 7, assembles air gauge 5 on each air gauge mounting hole, and air gauge selects Bidirectional gas pressure table.Filled at each sebific duct mounting hole
Equipped with sebific duct 4, each sebific duct is provided with valve, sebific duct connection source of the gas（Vavuum pump or compressed air）.In view of having on battery cap
The locus of limit, the not homonymy of battery cap is separately positioned on positioned at the air gauge mounting hole of adjacent single lattice, positioned at adjacent list
The sebific duct mounting hole of lattice is also disposed at the not homonymy of battery cap, as shown in Figure 2.Terminal hole 9 on battery cap is sealed.
It is that each single lattice for ensuring detecting tool reliably seals before degradation is carried out, first tests each single lattice of detecting tool
Sealing, specific method is as follows：Six safe bonnets are taken on each valve seat, each sebific duct is connected into vavuum pump respectively, opens peace
Valve on each sebific duct, after each single lattice is evacuated into -15kPa respectively, valve is closed, place 24h at room temperature, observation is simultaneously
Each single lattice air pressure meter reading is recorded, when air pressure change is less than 1kPa, it is believed that detecting tool sealing is qualified, you can carry out safety
Valve ageing management；Conversely, sealing is undesirable, frock need to be remake, then carries out above-mentioned sealing propertytest, until sealing
Safety valve ageing management can be carried out after qualified.
Safety valve degradation detecting method of the present invention is carried out in accordance with the following steps：
A, six are extracted as detection exemplar from the safety valve of a batch at random；
B, six detection exemplars are installed on each valve seat of detecting tool, measure one by one and record it is each detection exemplar it is old
Cracking pressure and valve closing pressure before change；
C, six detection exemplars are removed from the valve seat of detecting tool, uniformly applied on the valve interior wall of each safety valve
It is 1.4g/cm to smear density3（25℃）Sulfuric acid solution, then by it is each detection exemplar reinstall on each valve seat；
D, each single lattice of detecting tool is evacuated to -15kPa one by one；
E, it will be mounted with that the detecting tool for detecting exemplar is placed in 60 DEG C of ageing ovens and placed 5 days, by detecting tool from aging
Taken out in case, be cooled to room temperature；
F, each valve is opened, releases each single lattice negative pressure state, measured and recorded the after each detection exemplar aging one by one
Cracking pressure and cracking pressure and valve closing pressure；
G, testing result judges：After the first time cracking pressure of each detection exemplar after aging is no more than 40 kPa and aging
The cracking pressure of each detection exemplar compare aging with valve closing pressure before cracking pressure and valve closing pressure changing value be not more than ±
5kPa, then judge that the batch safety valve is qualified.If detecting substandard product in six detected detection exemplars, need
Double to sample（Extract 12 exemplars）Rechecked according to the method described above, if reinspection exemplar is all qualified, judge that this batch is pacified
Full valve is qualified, and reinspection still has unqualified exemplar, then is determined as that this batch safety valve is unqualified.
The atmospheric pressure value by air gauge monitoring each single lattice of detecting tool is needed in above-mentioned detection exemplar ageing process, works as pressure
It when change is less than 1kPa/ days, can continue to test, otherwise judge detecting tool seal failure, detection terminates.
The detection of first time cracking pressure, cracking pressure, valve closing pressure is carried out as follows：
Detected safety valve is arranged on the valve seat of corresponding a certain single lattice, to should single lattice sebific duct connection compression it is empty
Gas, safety valve upper cap upper glass plate, make the distance for keeping 0.5mm or so at the top of safety valve with sheet glass；With dropper to valve seat
Surrounding is dripped, and to safety valve mid-height position, is lived sheet glass with hand pressure, is opened valve, supplied gas into the single lattice, speed of supplying gas
The 2kPa/ seconds, when safe valve exhaust starts, write down pressure gauge reading now, as first time cracking pressure；It is gradually reduced valve
Door aperture, when safety valve is no longer vented, pressure gauge reading, as first time valve closing pressure are read, continue to reduce valve opening
Completely closed to valve.And then it is secondary open to should be on single lattice sebific duct valve supplied gas into the single lattice, speed of supplying gas
The 2kPa/ seconds, when safe valve exhaust starts, pressure gauge reading now is write down, as secondary cracking pressure；It is gradually reduced valve
Aperture, when safety valve is no longer vented, pressure gauge reading is read, as second of valve closing pressure, continues to reduce valve opening extremely
Valve completely closes.Cracking pressure and valve closing pressure using second of cracking pressure and second of valve closing pressure as safety valve.
The first time cracking pressure of safety valve, cracking pressure on other valve seats are arranged on using same method detection and closed
Valve pressure.
Following table is the specific DATA Example of certain batch safety valve ageing management：
Pressure unit：kPa
As can be seen from the above table, the first time cracking pressure of each detection exemplar after aging is not more than 40 kPa；After aging
The cracking pressure of each detection exemplar compare aging with valve closing pressure before cracking pressure and valve closing pressure changing value be not more than ±
5kPa, judge that the batch safety valve is qualified.
Claims (3)
- A kind of 1. safety valve degradation detecting method for lead-acid accumulator, it is characterised in that：Carried out according to the following steps：A, six are extracted as detection exemplar from the safety valve of a batch at random；B, six detection exemplars are installed on the valve seat of detecting tool, before measuring one by one and recording each detection exemplar aging Cracking pressure and valve closing pressure；C, six detection exemplars are removed from the valve seat of detecting tool, sulfuric acid is uniformly smeared in the valve interior wall of each safety valve Solution, then each detection exemplar is reinstalled on battery cap valve seat；D, each single lattice of detecting tool is evacuated to -15kPa；Detecting tool is placed at a temperature of 60 DEG C to five angels detect e, and detecting tool is cooled to room temperature after exemplar aging；F, measure one by one and record first time cracking pressure and cracking pressure and valve closing pressure after each detection exemplar aging；G, exemplar is detected to judge：The first time cracking pressure of each detection exemplar after aging is respectively examined after being not more than 40 kPa and aging The cracking pressure of test sample part compare aging with valve closing pressure before cracking pressure and the changing value of valve closing pressure be not more than ± 5kPa, Then judge that the batch safety valve is qualified；If detecting substandard product in six detected detection exemplars, need to double Sampling is rechecked according to the method described above, and reinspection exemplar is all qualified, then this batch safety valve is qualified, and reinspection still has unqualified exemplar, Then it is determined as that this batch safety valve is unqualified.
- 2. the safety valve degradation detecting method according to claim 1 for lead-acid accumulator, it is characterised in that：Detect sample The atmospheric pressure value of each single lattice of detecting tool is monitored in part ageing process, when pressure change is less than 1kPa/ days, can continue to test, instead Judgement detecting tool seal failure, detection terminate.
- 3. the safety valve degradation detecting method according to claim 2 for lead-acid accumulator, it is characterised in that：It is applied to The sulfuric acid solution density of the valve interior wall of each safety valve is 1.4g/cm3。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510724644.XA CN105355994B (en) | 2015-10-30 | 2015-10-30 | A kind of safety valve degradation detecting method and detecting tool for lead-acid accumulator |
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| CN201510724644.XA CN105355994B (en) | 2015-10-30 | 2015-10-30 | A kind of safety valve degradation detecting method and detecting tool for lead-acid accumulator |
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| CN105355994B true CN105355994B (en) | 2017-12-26 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109211562B (en) * | 2018-10-11 | 2020-10-30 | 天能电池集团股份有限公司 | Method and device for detecting aging performance of lead storage battery safety valve |
| CN109546245B (en) * | 2018-11-01 | 2021-04-09 | 超威电源集团有限公司 | Sealed container formation device |
| CN110057571A (en) * | 2019-04-12 | 2019-07-26 | 超威电源有限公司 | A kind of detection device and method of electric boosted automobile-used Capsule formula safety valve |
| CN113532842A (en) * | 2021-06-28 | 2021-10-22 | 合肥国轩高科动力能源有限公司 | Method for testing pressure-resistant service life of explosion-proof valve for lithium battery |
| CN115579574B (en) * | 2022-09-09 | 2023-11-24 | 江苏正力新能电池技术有限公司 | Method and device for encapsulating inner flat layer of explosion-proof valve of battery cell shell and battery cell |
| CN117895114B (en) * | 2023-12-12 | 2024-08-13 | 宿迁雷克电源有限公司 | Lead-acid battery pack with safety management system |
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| CN2295223Y (en) * | 1997-02-05 | 1998-10-21 | 谭元生 | Device for testing pressure of safety valve for sealed lead-acid accumulator |
| JP2011090861A (en) * | 2009-10-22 | 2011-05-06 | Panasonic Corp | Lead-acid storage battery |
| WO2012117502A1 (en) * | 2011-02-28 | 2012-09-07 | 株式会社Ｇｓユアサ | Lead storage battery and method for manufacturing same |
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