CN205665190U - A device for determining indisputable nickel battery solution carbonate content - Google Patents

Abstract

The utility model discloses a device for determining indisputable nickel battery solution carbonate content, contain the solution that awaits measuring in the beaker on magnetic stirrers upper portion, contain standard acidizing fluid in the beaker on the supporting platform upper portion on the electronic balance weighing plate, the beaker bottom is equipped with the burette, be equipped with control flap on the burette, the measuring electrode of digital tubular pH meter inserts in the beaker that fills the solution that awaits measuring, should contain the inside magnetic rod that is equipped with of beaker of the solution that awaits measuring, the camera is connected through the USB interface of data line with the main frame, a pH value data show through the display in real time for gathering the solution that awaits measuring, electronic balance's data output interface is connected with RS232C serial ports data acquisition interface in the computer through the data line, a weight data shows through the display in real time for gathering standard acidizing fluid. The utility model discloses simple structure, convenient operation, low cost can comparatively accurately survey the content of indisputable nickel battery solution carbonate.

Description

A kind of device for measuring Hawkins cell electrolyte carbonate content

Technical field

This utility model belongs to carbonate measurement apparatus technical field, is specifically related to a kind of for measuring Hawkins cell electrolysis The device of carbonate content in liquid.

Background technology

Along with society development, battery be widely applied to people life in, arrive greatly Aero-Space, little to computer hands Machine.Wherein Hawkins cell especially to new society development have important effect, Hawkins cell is again Edison battery, Edison in Within 1902, having invented this new-type accumulator, this accumulator has the service life of overlength, and environment will not be caused dirt Dye.

Hawkins cell in early days, the most once for the weight equipment such as automobile and tank.But due to the heaviest, gone out by the later stage Existing lead-acid battery, nickel-cadmium cell shake out.Today of 21 century, along with the enhancing of environmental consciousness, Hawkins cell again by Proposing, free of contamination Hawkins cell meets the green chemical concept that contemporary society is proposed very much.

The existence of electrolyte serves the biggest effect to the lifting of Hawkins cell performance, understands carbonate in electrolyte The content impact on battery, further grasps and when change electrolyte, extend the service life of battery, be battery The important directions of research.Open type battery in use, along with the charge and discharge process of battery, the hydroxide in electrolyte Thing can generate, with the carbon dioxide reaction in air, the carbonate that conduction is poor, increases the internal resistance of cell, affects battery performance, because of This needs to regularly replace electrolyte.Generally, when in battery electrolyte, carbonate content is more than 50g/L, need to change New electrolyte, otherwise can make battery capacity not enough, have a strong impact on battery life, even result in battery and scrap.So at battery Understand the content of carbonate in electrolyte during use in time, change electrolyte in time, it is ensured that battery operated ability and system Safety is requisite work.

In alkali system, the mensuration of carbonate content uses two step titrimetrys more at present, the carbonate content that the method measures Hydroxyl content can be measured by the first step to be affected.Owing to color range of indicator is relatively big, and affected by anthropic factor Needing to measure and repeatedly can obtain accurate numerical value, this leverages the process of integral experiment.Therefore, it is possible to provide one Planting simple to operate, result measures the device of carbonate content accurately and is particularly important.

Summary of the invention

This utility model solve the technical problem that there is provided a kind of simple in construction, easy to use and measure accurately for Measure the device of Hawkins cell electrolyte carbonate content.

This utility model adopts the following technical scheme that for solving above-mentioned technical problem, and one is used for measuring Hawkins cell electrolysis The device of liquid carbonate content, it is characterised in that mainly by display, main frame, photographic head, digital tubular type pH meter, magnetic force Agitator, electronic balance, support platform and beaker are constituted, and wherein fill solution to be measured in the beaker on magnetic stirring apparatus top, electricity The weighing plate of sub-balance is provided with support platform, fills standard acid solution in the beaker on support platform top, fills standard acid solution Beaker bottom is provided with the dropper extending to fill above the beaker of solution to be measured, and this dropper is provided with control valve, digital tubular type The electrode of measuring of pH meter inserts in the beaker filling solution to be measured, and this fills inside the beaker of solution to be measured equipped with magnetic bar, takes the photograph As head is connected with the USB interface of main frame by data wire, for gathering the pH value data of solution to be measured and by aobvious Showing that device shows this pH value data in real time, the data output interface of electronic balance is by data wire and the RS232C serial ports in computer Data acquisition interface is connected, for gathering the weight data of standard acid solution and showing this weight data in real time by display.

The pH meter seven segment digital tubes image being spaced apart 1s that this utility model collection is photographed by photographic head, image acquisition arrives After, by image binaryzation, then it is automatically positioned out numeric area by main frame and cuts out individual digit, carrying out template matching, Extract a stack features numeral, finally feature numeral feeding evaluator is identified, finally export the pH value knot of solution to be measured Really.

The using method of the device for measuring Hawkins cell electrolyte carbonate content described in the utility model, it is special Levy and be to concretely comprise the following steps: (1) takes the hydrochloric acid solution that molar concentration is 0.12mol/L demarcated and is placed in and is positioned over support In beaker on platform；(2) weigh solution to be measured to be placed in the beaker being positioned on magnetic stirring apparatus, and to filling solution to be measured Beaker in add barium chloride solution to precipitate carbonate completely, stand 10-20min make carbonate precipitate completely；(3) to filling The beaker of solution to be measured add magnetic bar and opens stirring, opening the control valve on dropper simultaneously, main frame adopt The weight data of the hydrochloric acid solution that collection is corresponding and the pH value data of solution to be measured, draw vertical coordinate according to the volume of data gathered For solution ph to be measured and curve that abscissa is hydrochloric acid solution quality, and curve is carried out derivation, draw titration according to curve During twice sudden change, there is being during peak point the catastrophe point of pH value in derivative, according to first pH value catastrophe point and second Individual pH value catastrophe point determines OH in solution to be measured respectively^-Consume quality m of hydrochloric acid solution₁With OH in solution to be measured^-And CO₃ ^2-Consume Gross mass m of hydrochloric acid solution₂, OH is calculated respectively according to equation below^-And CO₃ ^2-Concentration:

$C_{{\mathrm{OH}}^{-}}=\frac{C_{H^{+}}*V_{{\mathrm{OH}}^{-}}}{V_0}=amol/L,$

$C_{CO{3}^{2-}}=\frac{C_{H^{+}}*V_{CO{3}^{2-}}*M_{CO{3}^{2-}}}{2V_0}=bg/L,$

Wherein V₀Represent the volume of solution to be measured；Represent OH in solution to be measured^-Consume the volume of hydrochloric acid solution, according to OH in solution to be measured^-Consume quality m of hydrochloric acid solution₁And the molar concentration of hydrochloric acid solution tries to achieve；Represent in solution to be measured CO₃ ^2-Consume the volume of hydrochloric acid solution, according to CO in solution to be measured₃ ^2-Consume quality m of hydrochloric acid solution₂-m₁And the rubbing of hydrochloric acid solution You try to achieve at concentration.

Digital tubular type pH meter of the present utility model is higher than band display screen pH meter reaction sensitivity, and band display screen pH meter reads one Individual pH value probably needs the response time of 2-3 second, and digital tubular type pH meter reads a pH value and just can demonstrate for typically less than 1 second Carry out pH value, so this experimental provision have employed digital tubular type pH meter, obtain the pH value of solution to be measured by the method for image recognition, one Determine to improve in degree sensitivity and the degree of accuracy of measurement apparatus.

This utility model simple in construction, easy to operate, with low cost, it is possible to relatively accurately to measure Hawkins cell electrolyte The content of carbonate, during whole experimental provision measures, operator can be busy with after opening the control valve on dropper Other experiment, directly processes the data measured and can be obtained by experimental result after having tested, if carbonate content one group Data just can be accurately obtained experimental result, decreases man's activity, without repetitive measurement averaging, shortens mensuration Time.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the curve drawn according to the solution ph data to be measured gathered and hydrochloric acid solution qualitative data and derivation song Line.

In figure: 1, display, 2, main frame, 3, photographic head, 4, digital tubular type pH meter, 5, solution to be measured, 6, magnetic force Rod, 7, standard acid solution, 8, support platform, 9, electronic balance, 10, magnetic stirring apparatus.

Detailed description of the invention

Particular content of the present utility model is described in detail in conjunction with accompanying drawing.One is used for measuring Hawkins cell electrolyte carbonate The device of content, mainly by display 1, main frame 2, photographic head 3, digital tubular type pH meter 4, magnetic stirring apparatus 10, electronics Balance 9, support platform 8 and beaker are constituted, and wherein fill solution 5 to be measured, electronic balance 9 in the beaker on magnetic stirring apparatus 10 top Weighing plate be provided with support platform 8, fill standard acid solution 7 in the beaker on support platform 8 top, fill the burning of standard acid solution 7 Being provided with the dropper extending to fill above the beaker of solution 5 to be measured bottom Bei, this dropper is provided with control valve, digital tubular type pH The electrode of measuring of meter 4 inserts in the beaker filling solution 5 to be measured, and this fills inside the beaker of solution 5 to be measured equipped with magnetic bar 6, Photographic head 3 is connected by the USB interface of data wire with main frame 2, for gathering the pH value data of solution 5 to be measured and leading to Crossing display 1 to show in real time, the data output interface of electronic balance 9 is gone here and there with the RS232C in main frame 2 by data wire Mouth data acquisition interface is connected, for gathering the weight data of standard acid solution 7 and being shown in real time by display 1.

Embodiment 1

1, the chemical equation that in Hawkins cell electrolyte, the titration of carbonate is used is as follows:

(1)Na₂CO₃+BaCl₂→BaCO₃↓+2NaCl

(2)NaOH+HCl→NaCl+H₂O

(3)BaCO₃+2HCl→BaCl₂+H₂O+CO₂↑

2, operating procedure is as follows:

(1) take the hydrochloric acid solution that molar concentration is 0.12mol/L demarcated to be placed in the beaker holding standard acid solution；

(2) 25g BaCl is weighed₂And add deionized water dissolving constant volume in 100mL volumetric flask, obtain mass concentration being 25% BaCl₂Solution；

(3) solution to be measured (Hawkins cell electrolyte) 2mL is pipetted in the beaker holding solution to be measured；

(4) pipette 70mL deionized water to pour in the beaker holding solution to be measured；

(5) BaCl that mass concentration is 25% is pipetted₂Solution 2mL adds in the beaker holding solution to be measured and stands 15 points Clock makes carbonate precipitate completely.

3, the registration of electronic balance being made zero, it is molten that the amount that main frame reduces by calculating electronic balance calculates hydrochloric acid The quality that liquid consumes.It is next to be placed on magnetic stirring apparatus the beaker equipped with solution to be measured, notes ensureing magnetic bar uniform stirring, Speed can not be too fast, and the electrode of measuring of digital tubular type pH meter is used for measuring the pH-value of testing liquid, shooting in solution to be measured PH value data on head logarithmic code tubular type pH meter are acquired, and the principle identified by numeral carries out data process.Open dropper On control valve instill in solution to be measured slowly by hydrochloric acid solution, the collection of electronic balance and photographic head can obtain a series of Data (being shown in Table 1), then draw on Origin software, and carry out derivation process (as shown in Figure 1).

The pH value data of table 1 solution to be measured and the qualitative data of hydrochloric acid solution

Quality/g	35.02	…	47.75	…	59.01	…	59.80	…
									PH value	13.54	…	10.06	…	4.03	…	2.83	…

Fig. 1 center line one represents titration curve, and line two represents the first derivative of titration curve, as seen from the figure titration process By first derivative curve, twice sudden change of middle appearance, can affirm that image has twice catastrophe point, when peak point occurs in first derivative Being the catastrophe point of pH value, the pH value of first extreme point is 10.06, and the consumption of corresponding hydrochloric acid solution is 47.75g, second The pH value of individual extreme point is 4.03, and the total consumption of corresponding hydrochloric acid solution is 59.01g.Therefore calculate solution O H to be measured^-、CO₃ ^2-Group The content application formula divided is:

$C_{{\mathrm{OH}}^{-}}=\frac{C_{H^{+}}*V_{{\mathrm{OH}}^{-}}}{V_0}=amol/L$

$C_{CO{3}^{2-}}=\frac{C_{H^{+}}*V_{CO{3}^{2-}}*M_{CO{3}^{2-}}}{2V_0}=bg/L$

Wherein V₀The volume representing solution to be measured is 2mL；Represent OH in solution to be measured^-Consume the volume of hydrochloric acid solution,Represent CO in solution to be measured₃ ^2-Consume the volume of hydrochloric acid solution.And obtained a=by the data above-mentioned formula of substitution recorded 2.87mol/L, b=2027g/L.So OH in this solution to be measured^-Content be 2.87mol/L, CO₃ ^2-Content be 20.27g/ L。

Of the present utility model ultimate principle, principal character and advantage are more than shown and described, new without departing from this practicality On the premise of type spirit and scope, this utility model also has various changes and modifications, and these changes and improvements both fall within requirement and protect The scope of the present utility model protected.

Claims (1)

1. the device being used for measuring Hawkins cell electrolyte carbonate content, it is characterised in that main by display, calculating Machine host, photographic head, digital tubular type pH meter, magnetic stirring apparatus, electronic balance, support platform and beaker are constituted, and wherein magnetic force stirs Filling solution to be measured in mixing the beaker on device top, the weighing plate of electronic balance is provided with support platform, the burning on support platform top Filling standard acid solution in Bei, the beaker bottom filling standard acid solution is provided with dripping above the beaker extending to fill solution to be measured Pipe, this dropper is provided with control valve, and the electrode of measuring of digital tubular type pH meter inserts in the beaker filling solution to be measured, and this fills Equipped with magnetic bar inside the beaker of solution to be measured, photographic head is connected with the USB interface of main frame by data wire, is used for Gathering the pH value data of solution to be measured and show this pH value data in real time by display, the data output interface of electronic balance leads to Cross data wire to be connected with the RS232C serial port data acquisition interface in computer, for gathering the weight data of standard acid solution also This weight data is shown in real time by display.