CN101216537A - Single-electrode potential measurement method suitable for alkaline sealed cell and its device - Google Patents
Single-electrode potential measurement method suitable for alkaline sealed cell and its device Download PDFInfo
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- CN101216537A CN101216537A CNA2007101733885A CN200710173388A CN101216537A CN 101216537 A CN101216537 A CN 101216537A CN A2007101733885 A CNA2007101733885 A CN A2007101733885A CN 200710173388 A CN200710173388 A CN 200710173388A CN 101216537 A CN101216537 A CN 101216537A
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Abstract
A single-electrode potential measurement method for alkaline sealed battery and device thereof adopt a built-in sintered nickel electrode as the reference electrode. The device comprises a conductive housing, two conductive anti-explosion covers positioned at both ends of the housing and insulatively and hermetically connected with the housing, wherein an electrolyte, a membrane and a positive electrode, a negative electrode and the sintered nickel electrode isolated from each other by the membrane are arranged in the housing; any of the positive electrode, the negative electrode and the sintered nickel electrode is electrically connected with the housing; and the other two electrodes are respectively and electrically connected with two anti-explosion covers. The invention solves the difficult problem in sealing and has the advantages of simple operation and no addition of extra size. The method for potential measurement of the positive and the negative electrodes by using the built-in sintered nickel electrode used as reference electrode is suitable for nickel-based aqueous batteries, such as Cd-Ni battery, MH-Ni battery and Zn-Ni battery.
Description
Technical field
The present invention be more particularly directed to a kind of method and apparatus of measuring single electrode potential.
Background technology
In battery research,, must use contrast electrode in order to measure the electrode potential of negative or positive electrode.For accuracy and the stability that keeps measurement result, require the electrode potential of contrast electrode stable, favorable reproducibility, and not can with tested electrode system generation chemical reaction.In addition, also should be simple in structure, be easy to make, use and preserve conveniently.
Contrast electrode has obtained widely using in the open cell system always, for example: mainly contain Hg/HgO and Cd/Cd (OH) as what use in Cd-Ni and the MH-Ni battery in alkaline open cell system
2Contrast electrode; That uses in acid open cell system such as lead-acid battery mainly contains Cd/CdSO
4Contrast electrode.In the opening system, there is very big space to place for contrast electrode, lower to the volume requirement of itself; Its electrode potential is relatively stable in electrolytic solution simultaneously.
With the MH-Ni battery is example, and when the MH-Ni battery charge later stage with when overcharging, the reaction of generation is:
Anodal: 4OH
-→ 2H
2O+O
2+ 4e
-
Negative pole: 4MH+O
2→ 4M+2H
2O
The MH-Ni battery product comprises cylindrical battery and square sealing battery, during the behavior of former studies both positive and negative polarity, all be that these two kinds of batteries are placed a large amount of electrolytic solution, in electrolyte system, put into the Hg/HgO contrast electrode then, but be not equal in single electrode behavior that tests out in this case and the sealing system, mainly show: (1) sealed cell is lean solution formula (not having free electrolyte) design, and open cell is rich solution (an electrolytic solution submergence positive/negative plate); (2) sealed cell overcharges or the following a large amount of gassings of both positive and negative polarity during charging of high temperature, the oxygen that positive pole is separated out is compound on negative pole, emit a large amount of heat simultaneously, the hydrogen that negative pole is separated out also can be in anodal oxidation, and under open state since gas overflow above-mentioned reacting dose significantly reduced; (3) temperature variation of battery charge and discharge process has greatly been weakened because of the existence of a large amount of electrolytic solution, therefore is reflected on the voltage and both positive and negative polarity electrode potential of battery, and open cell and sealed cell all have than big difference.Therefore the both positive and negative polarity electrode potential of measuring under the open state can't react the truth of sealed cell use.
" also have with Cd/Cd (OH) on the battery technology handbook (Tang's rose of Sharon, second edition, China Science Tech Publishing House)
2Contrast electrode is used for the elaboration of sealed cell system, but there are these problems in this: 1, the too complicated sealing that also is difficult to guarantee battery of structure; 2, owing to will place complicated contrast electrode and realize sealing, the battery cavity has strengthened several times, thereby bigger with true system difference; 3, the Cd/Cd (OH) in the sealed cell
2It is very big that contrast electrode is influenced by oxygen, and promptly contrast electrode has been subjected to oxidation or has poisoned, and the contrast electrode current potential changes bigger in charging process, can't keep its stability.
Summary of the invention
The objective of the invention is to, single-electrode potential measurement method and device thereof in a kind of sealed cell system are provided, to overcome the above-mentioned deficiency of prior art.
For achieving the above object, the present invention adopts following technical scheme:
A kind of single-electrode potential measurement method that is applicable to alkaline sealed cell is done contrast electrode with built-in sintered nickel electrode.
A kind of single-electrode potential measurement device that is applicable to alkaline sealed cell comprises:
Conductive shell, the Explosion-proof cap of two conductions that are positioned at described housing two ends and are connected with described housing insulated enclosure, the positive pole, negative pole, the sintered nickel electrode that are provided with electrolytic solution, barrier film in the described housing and separate by described barrier film, arbitrary utmost point and housing in described positive pole, negative pole, three electrodes of sintered nickel electrode are electrically connected, and other two electrodes are electrically connected with two described Explosion-proof caps respectively.
Further, described barrier film is between described positive pole and negative pole, and described positive pole, negative pole and barrier film are the spiral fashion of coiling, and this spiral helicine outmost turns is a barrier film, and the outside of the barrier film of this outer ring is wound with sintered nickel electrode.
Further, described conductive shell is square or the cylindrical metal housing.
Further, described conductive shell is the square metal housing, and described barrier film is between described positive pole and negative pole, and described positive pole, negative pole and barrier film are the lamination shape, and the outermost layer of this lamination shape is a barrier film, and the outside of this outer field barrier film has stacked sintered nickel electrode.
Further, described barrier film is between described positive pole and negative pole, and described positive pole and negative pole are the spiral fashion of coiling, and this spiral helicine outmost turns is a barrier film, and the outside of the barrier film of this outer ring is wound with sintered nickel electrode.
Further, described sintered nickel electrode is attached at described housing inboard and is electrically connected with described housing, and described positive pole, negative pole are electrically connected with two Explosion-proof caps respectively.
Further, also comprise two lugs, logical respectively two lugs of described positive pole, negative pole and two Explosion-proof caps are electrically connected.
Further, also comprise two insulated enclosure circles, the Explosion-proof cap of described two conductions is connected with described housing insulated enclosure by described insulated enclosure circle.
Compare with bibliographical information, this method has overcome the problem of sealing difficulty, and is simple to operate, do not increase extra volume simultaneously.Adopt built-in sintered nickel electrode to do contrast electrode and carry out the method that the both positive and negative polarity electrode potential measures and be applicable to Ni-based water system battery research, as Cd-Ni battery, MH-Ni battery and zinc-nickel cell.
Description of drawings
Fig. 1 makees the device synoptic diagram of contrast electrode for adopting sintered nickel electrode in the cylindrical battery;
Fig. 2 does the contrast electrode schematic representation of apparatus for adopting sintered nickel electrode in the rectangular cell;
Fig. 3 is 4/5A battery 520mA charging 3h, cell voltage, anodal current potential, the negative pole potential curve of 1300mA discharge;
Cell voltage, anodal current potential, negative pole potential curve when Fig. 4 is 60 ℃ of following 4/5A battery 280mA charge and discharge cycles.
Embodiment
A kind of single-electrode potential measurement method that is applicable to alkaline sealed cell is done contrast electrode with sintered nickel electrode and is measured sealed cell system both positive and negative polarity electrode potential.Because the main electricity that sintered nickel electrode exists is to being Ni (OH)
2/ NiOOH, this contrast electrode is easy to deposit, and is more stable under alkaline system and oxygen enrichment system, can be made in small sizes again simultaneously, is convenient to assembling.
Wherein, sintered nickel electrode can commercially also can be made by oneself, and its preparation method is:
On nickel plated steel strip, coat pulverous metallic nickel slurry, again through 800-1200 ℃ high temperature sintering, vacuum impregnation in nickel salt solutions such as nickel nitrate, nickelous sulfate, oven dry alkalization then is then with 6-20mAh/cm
2Discharge and recharge activation, obtain the commercialization sintered nickel electrode.
As shown in Figure 1, a kind of single-electrode potential measurement device that is applicable to alkaline sealed cell comprises:
In the present embodiment, described barrier film 6 described anodal 1 and negative pole 2 between, described anodal 1 and negative pole 2 be the spiral fashion of coiling, this spiral helicine outmost turns is a barrier film 6, the outside of the barrier film 6 of this outer ring is wound with sintered nickel electrode 3.
In the present embodiment, it is inboard and be electrically connected with described housing 5 that described sintered nickel electrode 3 is attached at described housing 5, and described anodal 1, negative pole 2 is electrically connected with two Explosion- proof caps 9,10 respectively.
In the present embodiment, also comprise two lugs 7,8, described anodal 1, logical respectively two lugs 7,8 of negative pole 2 and two Explosion- proof caps 9,10 are electrically connected.
In the present embodiment, also comprise two insulated enclosure circles 4, the Explosion- proof cap 9,10 of described two conductions is connected with described housing 5 insulated enclosures by described insulated enclosure circle 4.
Compare with bibliographical information, this method has overcome the problem of sealing difficulty, and is simple to operate, do not increase extra volume simultaneously.Adopt built-in sintered nickel electrode to do contrast electrode and carry out the method that the both positive and negative polarity electrode potential measures and be applicable to Ni-based water system battery research, as Cd-Ni battery, MH-Ni battery and zinc-nickel cell.
Wherein, putting into sintered nickel electrode in the sealed cell system can adopt following method to make as contrast electrode:
At first battery container 5 bottoms are reamed, form the cylindric of both ends open, and polish the sealing of the edge assurance sealing part of faucal.Earlier with battery container 5 one end slot rollings, sintered nickel electrode 3 to be packed into behind the battery, contrast electrode 3 and battery container 5 are inboard directly to be contacted, and lug 7,8 first points are welded on the Explosion- proof cap 9,10 of an end of slot rolling battery container 5, a terminal tool are sealed after adding O-ring seal 4.After this end sealing, add alkaline electrolyte an amount of, suitable density from the other end, adopt the same manner with this other end sealing at the other end afterwards, just earlier spot-welded together with Explosion- proof cap 9,10 respectively lug 8,7.The advantage of this structure is, has realized once sealing and good sealing effect, has been convenient to operation, does not almost have short circuit and leakage battery and occurs.Positive pole 1, negative pole 2 and contrast electrode 3 extraction locations can exchange, and promptly arbitrary electrode all can directly contact battery container, only other two electrodes need be drawn from Explosion- proof cap 9,10 to get final product.
Adopt sintered nickel electrode to do the contrast electrode device as shown in Figure 2 in the rectangular cell.Because the pole of positive pole 1, negative pole 2 is fixing, contrast electrode can only be drawn from the square metal shell wall of battery.Described barrier film described anodal 1 and negative pole 2 between, described anodal 1, negative pole 2 and barrier film is the spiral fashion of coiling or the mode of lamination shape is assembled (not shown), the outermost layer of this spiral fashion or lamination shape is a barrier film, and the outside of this outer field barrier film has stacked sintered nickel electrode.
The 4/5A type Ni-MH battery made from said method, just/the negative pole design capacity is 1300/2000mAh.Fig. 3 for this 4/5A battery with the 520mA 3h that charges, cell voltage, anodal current potential, the negative pole potential curve of 1300mA discharge.Can find out that the variation of anodal current potential is consistent with the variation of cell voltage, explanation is that positive electrode capacity has determined battery capacity.Cell voltage, anodal current potential, negative pole potential curve when Fig. 4 is the following 280mA charge and discharge cycles of 60 ℃ on the 4/5A battery of present embodiment, wherein the variation of anodal current potential is consistent with the variation of cell voltage, this illustrates equally, under 60 ℃ of high temperature, is still positive electrode capacity and has determined battery capacity.
Claims (8)
1. a single-electrode potential measurement method that is applicable to alkaline sealed cell is characterized in that: do contrast electrode with built-in sintered nickel electrode.
2. single-electrode potential measurement device that is applicable to alkaline sealed cell is characterized in that comprising:
Conductive shell, the Explosion-proof cap of two conductions that are positioned at described housing two ends and are connected with described housing insulated enclosure, the positive pole, negative pole, the sintered nickel electrode that are provided with electrolytic solution, barrier film in the described housing and separate by described barrier film, arbitrary utmost point and housing in described positive pole, negative pole, three electrodes of sintered nickel electrode are electrically connected, and other two electrodes are electrically connected with two described Explosion-proof caps respectively.
3. the single-electrode potential measurement device that is applicable to alkaline sealed cell according to claim 2, it is characterized in that: described barrier film is between described positive pole and negative pole, described positive pole, negative pole and barrier film are the spiral fashion of coiling, this spiral helicine outmost turns is a barrier film, and the outside of the barrier film of this outer ring is wound with sintered nickel electrode.
4. the single-electrode potential measurement device that is applicable to alkaline sealed cell according to claim 3 is characterized in that: described conductive shell is square or the cylindrical metal housing.
5. the single-electrode potential measurement device that is applicable to alkaline sealed cell according to claim 2, it is characterized in that: described conductive shell is the square metal housing, described barrier film is between described positive pole and negative pole, described positive pole, negative pole and barrier film are the lamination shape, the outermost layer of this lamination shape is a barrier film, and the outside of this outer field barrier film has stacked sintered nickel electrode.
6. according to arbitrary described single-electrode potential measurement device that is applicable to alkaline sealed cell in the claim 3,4 or 5, it is characterized in that: described sintered nickel electrode is attached at described housing inboard and is electrically connected with described housing, and described positive pole, negative pole are electrically connected with two Explosion-proof caps respectively.
7. according to arbitrary described single-electrode potential measurement device that is applicable to alkaline sealed cell in the claim 3,4 or 5, it is characterized in that: also comprise two lugs, logical respectively two lugs of described positive pole, negative pole and two Explosion-proof caps are electrically connected.
8. according to arbitrary described single-electrode potential measurement device that is applicable to alkaline sealed cell in the claim 1 to 5, it is characterized in that: also comprise two insulated enclosure circles, the Explosion-proof cap of described two conductions is connected with described housing insulated enclosure by described insulated enclosure circle.
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|---|---|---|---|
| CN200710173388A CN101216537B (en) | 2007-12-27 | 2007-12-27 | Single-electrode potential measurement method suitable for alkaline sealed cell and its device |
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|---|---|---|---|
| CN200710173388A CN101216537B (en) | 2007-12-27 | 2007-12-27 | Single-electrode potential measurement method suitable for alkaline sealed cell and its device |
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| CN101216537A true CN101216537A (en) | 2008-07-09 |
| CN101216537B CN101216537B (en) | 2012-10-03 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192935A (en) * | 2010-03-15 | 2011-09-21 | 深圳市比克电池有限公司 | Electrolytic cell, apparatus and method for electrochemical measurement |
| CN106654361A (en) * | 2017-01-20 | 2017-05-10 | 中天储能科技有限公司 | Three-electrode device and preparation method thereof |
| CN106841357A (en) * | 2017-01-20 | 2017-06-13 | 中天储能科技有限公司 | A kind of three-electrode system testing device and its method of testing |
| CN112098863A (en) * | 2020-09-14 | 2020-12-18 | 江苏塔菲尔动力系统有限公司 | Method, device and system for detecting failure of lithium ion battery |
| CN114089193A (en) * | 2021-10-19 | 2022-02-25 | 清华大学 | Method and device for estimating temperature and negative pole potential of battery on line and computer equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3951526B2 (en) * | 1999-11-26 | 2007-08-01 | 松下電器産業株式会社 | Cylindrical storage battery |
| JP4701450B2 (en) * | 2003-05-09 | 2011-06-15 | Ｄｏｗａエレクトロニクス株式会社 | Battery characteristic evaluation apparatus and battery characteristic evaluation method |
| CN100373680C (en) * | 2005-03-14 | 2008-03-05 | 河南环宇集团有限公司 | Dynamic column sealed Zn-Ni alkaline battery |
| CN200997429Y (en) * | 2006-12-18 | 2007-12-26 | 上海比亚迪有限公司 | Triple-electrode battery |
| CN100481601C (en) * | 2007-05-30 | 2009-04-22 | 李文华 | Three-electrode electro chemical cell |
-
2007
- 2007-12-27 CN CN200710173388A patent/CN101216537B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192935A (en) * | 2010-03-15 | 2011-09-21 | 深圳市比克电池有限公司 | Electrolytic cell, apparatus and method for electrochemical measurement |
| CN106654361A (en) * | 2017-01-20 | 2017-05-10 | 中天储能科技有限公司 | Three-electrode device and preparation method thereof |
| CN106841357A (en) * | 2017-01-20 | 2017-06-13 | 中天储能科技有限公司 | A kind of three-electrode system testing device and its method of testing |
| CN112098863A (en) * | 2020-09-14 | 2020-12-18 | 江苏塔菲尔动力系统有限公司 | Method, device and system for detecting failure of lithium ion battery |
| CN114089193A (en) * | 2021-10-19 | 2022-02-25 | 清华大学 | Method and device for estimating temperature and negative pole potential of battery on line and computer equipment |
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|---|---|
| CN101216537B (en) | 2012-10-03 |
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