CN105140578B - A kind of method for detecting active substance for positive electrode of lead-acid accumulator softening degree - Google Patents
A kind of method for detecting active substance for positive electrode of lead-acid accumulator softening degree Download PDFInfo
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- CN105140578B CN105140578B CN201510545843.4A CN201510545843A CN105140578B CN 105140578 B CN105140578 B CN 105140578B CN 201510545843 A CN201510545843 A CN 201510545843A CN 105140578 B CN105140578 B CN 105140578B
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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
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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)
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- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a kind of method for detecting active substance for positive electrode of lead-acid accumulator softening degree, comprise the following steps：(1) battery is dissected, takes out the positive plate for needing to test；(2) after positive plate is dried, weigh, record weight is M1；(3) dried positive plate is immersed in distilled water, sonic oscillation processing a period of time；(4) positive plate is taken out, dries, weigh, record weight is M2；(5) softness number X, X=(M1 M2)/M1 of positive active material is calculated.The method of testing of the present invention is simple, and operation is easy, as a result accurately and reliably, lead paste formula is adjusted during battery design according to test result, so as to prevent or delay positive material(PAM) softening to come off, extends the life-span of battery.
Description
Technical field
The invention belongs to lead-acid accumulator field, and in particular to one kind detection active substance for positive electrode of lead-acid accumulator softening journey
The method of degree.
Background technology
For lead-acid accumulator, it is a major reason for influenceing battery life that positive material(PAM) softening, which comes off, and
The more universal failure mode of current battery.Battery pole plates active material is brown lead oxide, porous metals lead respectively.Brown lead oxide
There are two kinds of crystal modifications of α and β.α-PbO21 μm of larger particles are can obtain during deposition, are tightly combined between particle and with larger
Hardness；And β-PbO2Variant is tiny acicular crystal, and intergranular adhesion is poor.Active material during charge and discharge cycles, α-
PbO2Gradate as β-PbO2, and the Volume Changes of active material will cause the softening of anode diachylon, take off in charge and discharge process
Fall.P.Lailler et al. thinks, with the increase β-PbO of cycle life2Also continue to increase, the surface of active material is also from 4m2/
G drops to 2.5m2/ g so that β-PbO2Contact effect is lost with grid, so as to cause positive material(PAM) softening to come off.
The occurrence of softening and shedding occurs to positive active material at present, mainly observes by the naked eye judgement.To failure
Battery extracts some electrolyte out in charging process, observation electrolyte if it find that rubescent or black, serious meeting be it is pitch-dark or
Muddy is presented, illustrates that battery positive plate is softened.Watched outside positive plate, pole plate is initially hard, is made with improper
With and using cycle increase, pole plate softening take place, develop, gradually become soft until becoming pasty state.Positive plate it is soft
Change and the active material on pole plate is reduced, pole plate top surface area declines, and causes the capacity of battery to be greatly reduced.Lead-acid accumulator
Positive plate softens, and coming off for active material is inevitable.With the increase of discharge and recharge cycle, active material surface on pole plate
Shrink, gather aperture and increase, be continuously increased macropore, destroy the structure of positive plate, cause the active material of positive plate soft
Change comes off.
The softening and shedding of positive plate active material is a major reason of lead-acid battery failure, and research and development one kind is prevented or delayed
The lead paste formula of positive plate softening is one of problem that the R＆D personnel studies for a long period of time, and rationally, judge positive plate exactly
Softening degree provides basis for estimation for research lead paste formula, how to provide a kind of test side of accurate judgement positive plate softening degree
Method is that the present invention needs to solve the problems, such as.
The content of the invention
The invention provides a kind of method for detecting active substance for positive electrode of lead-acid accumulator softening degree, the detection side is utilized
Method is ready for calculating the softness number of positive active material, and data support is provided for the research and development of lead paste formula.
A kind of method for detecting active substance for positive electrode of lead-acid accumulator softening degree, comprises the following steps：
(1) battery is dissected, takes out the positive plate for needing to test；
(2) after positive plate is dried, weigh, record weight is M1；
(3) dried positive plate is immersed in distilled water, sonic oscillation processing a period of time；
(4) positive plate is taken out, dries, weigh, record weight is M2；
(5) softness number X, X=(M1-M2)/M1 of positive active material is calculated.
Preferably, in step (2) and step (4), the temperature of the drying is 70~80 DEG C, and the time is 2~3h.If
Drying temperature is too high, overlong time, and the active material that polar board surface does not soften in the drying process can also drop, therefore drying temperature
Unsuitable too high, the time is unsuitable long.More preferably, the temperature of the drying is 80 DEG C, time 2h.
Preferably, the ultrasonic condition is 30~60KHz, the time is 5~20min.Supersonic frequency is too high easily will
The active material that polar board surface does not soften is shaken off, therefore ultrasound condition is come off with will soften material.More preferably, the ultrasound
Condition is 53KHz.
The beneficial effect that the present invention possesses：The method of testing of the present invention is simple, and operation is easy, as a result accurately and reliably, foundation
Test result adjusts during battery design to lead paste formula, so as to prevent or delay positive material(PAM) softening to take off
Fall, extend the life-span of battery.
Embodiment
With reference to specific embodiment, the invention will be further described.
Embodiment one
(1) the 12Ah batteries of 300 cycle charge-discharges are dissected, take out positive plate；
(2) positive plate is positioned in air dry oven 80 DEG C, after drying 2h, takes out and weigh, record weight M1=
45.456g；
(3) dried positive plate is positioned in 250mL beakers, adds 250mL distilled water, it is ultrasonic under 53KHz
8min；
(4) positive plate being ultrasonically treated is positioned in air dry oven 80 DEG C, after drying 2h, takes out and weigh, record
Weight M2=37.358g；
(5) softness number X, X=(45.456-37.358)/45.456 × 100%=of positive active material are calculated
17.8%.
Embodiment two
(1) the new batteries of 12Ah without cycle charge-discharge are dissected, take out positive plate；
(2) positive plate is positioned in air dry oven 80 DEG C, after drying 2h, takes out and weigh, record weight M1=
41.768g；
(3) dried positive plate is positioned in 250mL beakers, adds 250mL distilled water under 53KHz, ultrasound
16min；
(4) positive plate being ultrasonically treated is positioned in air dry oven 80 DEG C, after drying 2h, takes out and weigh, record
Weight M2=41.481g；
(5) softness number X, X=(41.768-41.481)/41.768 × 100%=of positive active material are calculated
0.687%.
The result of calculation of comparative example one and embodiment two, the softness number of the 12Ah batteries without cycle charge-discharge is almost
For 0, and the softness number of the 12Ah batteries of cycle charge-discharge 300 times is significantly raised, illustrates with the increase of discharge and recharge cycle, positive pole
It is more serious that softening and shedding situation occurs for the active material of plate.
Claims (1)
- A kind of 1. method for detecting active substance for positive electrode of lead-acid accumulator softening degree, it is characterised in that comprise the following steps：(1) battery is dissected, takes out the positive plate for needing to test；(2) after positive plate is dried, weigh, record weight is M1；(3) dried positive plate is immersed in distilled water, sonic oscillation processing a period of time；(4) positive plate is taken out, dries, weigh, record weight is M2；(5) softness number X, X=(M1-M2)/M1 of positive active material is calculated；In step (2) and step (4), the temperature of the drying is 80 DEG C, time 2h；In step (3), the ultrasonic condition is 53KHz, and the time is 5~20min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510545843.4A CN105140578B (en) | 2015-08-28 | 2015-08-28 | A kind of method for detecting active substance for positive electrode of lead-acid accumulator softening degree |
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| CN201510545843.4A CN105140578B (en) | 2015-08-28 | 2015-08-28 | A kind of method for detecting active substance for positive electrode of lead-acid accumulator softening degree |
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| CN105140578A CN105140578A (en) | 2015-12-09 |
| CN105140578B true CN105140578B (en) | 2017-12-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106990036B (en) * | 2017-04-25 | 2023-06-16 | 天能电池集团股份有限公司 | Device and method for detecting softening degree of polar plate active material |
| CN107389492A (en) * | 2017-05-27 | 2017-11-24 | 天能电池(芜湖)有限公司 | A kind of accumulator anode board softens quantitative measuring method |
| CN108508375A (en) * | 2018-05-09 | 2018-09-07 | 国联汽车动力电池研究院有限责任公司 | A kind of systematic analytic method of lithium ion battery failure |
| CN110220813A (en) * | 2019-06-28 | 2019-09-10 | 浙江天能电池(江苏)有限公司 | Accumulator anode board lead plaster softens detection method |
| CN110398457A (en) * | 2019-08-06 | 2019-11-01 | 郑州中科新兴产业技术研究院 | A kind of electrodes of lithium-ion batteries adherency force test method |
| CN113406506A (en) * | 2021-05-12 | 2021-09-17 | 天能电池集团股份有限公司 | Method for predicting service life of lead storage battery |
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| CN100575916C (en) * | 2005-12-26 | 2009-12-30 | 比亚迪股份有限公司 | A kind of method of measuring dressing strength of battery electrode flake |
| CN101581658A (en) * | 2008-05-16 | 2009-11-18 | 比亚迪股份有限公司 | Method for measuring bonding strength of granules of pole piece active material layer |
| CN102235957B (en) * | 2011-07-21 | 2015-09-02 | 东莞新能源科技有限公司 | The close-burning detection method of electrodes of lithium-ion batteries and equipment thereof |
| CN103940695A (en) * | 2014-04-14 | 2014-07-23 | 四川城际轨道交通材料有限责任公司 | Method for testing microbial fixation strength of carbon fiber carrier |
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Address after: 313100 Coal Mountain Industrial Park, Changxing County, Huzhou City, Zhejiang Province Patentee after: Tianneng Battery Group Co., Ltd. Address before: 313100 Coal Mountain Industrial Park, Changxing County, Huzhou City, Zhejiang Province Patentee before: Tianneng Battery Group Co., Ltd. |