Device and method for detecting potential of valve-regulated sealed lead-acid storage battery

Abstract

The invention discloses a device and method for detecting the potential of a valve-regulated sealed lead-acid storage battery, and relates to the technical field of detection devices.The device comprises the valve-regulated sealed lead-acid storage battery, the valve-regulated sealed lead-acid storage battery comprises a plurality of unit cells connected in series, every two adjacent unit cells are connected through a busbar, and the busbar is connected with the valve-regulated sealed lead-acid storage battery. A safety valve hole is formed in the top of each single-cell battery; a screw is inserted into each busbar; an acid pot filled with a colloid sulfuric acid solution is arranged at the upper part of the valve-regulated sealed lead-acid storage battery in the formation process; each safety valve hole is correspondingly provided with a beaker filled with a sulfuric acid solution, each beaker is internally provided with a mercurous sulfate electrode and a salt bridge, and the other end of the salt bridge penetrates through the acid kettle and the insertion pipe of the acid kettle and extends into the battery; according to the method, the electrode potential in the formation process of the lead-acid storage battery can be conveniently and accurately measured on line without dissecting the battery, and the electrode potential information in the formation process of the battery can be conveniently known.

Description

Technical Field

[0001] The invention relates to the technical field of detection devices, and in particular to a detection device and a detection method for the potential of a valve-controlled sealed lead-acid battery. Background Art

[0002] In the traditional method of measuring electrode potential, for flooded batteries, a cadmium rod is inserted into the electrolyte for detection. The principle is that during the charge and discharge process of the battery, the concentration of the electrolyte changes accordingly, so the electrode potential of the cadmium rod changes. Therefore, inserting the cadmium rod into the electrolyte as a reference electrode to measure the battery electrode potential is a relatively rough method of measuring electrode potential.

[0003] However, it is difficult to use cadmium rods to measure the electrode potential of such closed batteries, such as valve-regulated sealed lead-acid batteries. In the prior art, the battery needs to be dissected and disassembled when measuring the electrode potential, which is cumbersome and easy to damage the battery. Therefore, it is difficult to measure the electrode potential of the battery. Summary of the invention

[0004] The object of the present invention is to provide a detection device and a detection method for the potential of a valve-controlled sealed lead-acid battery during a formation process, so as to solve the following technical problems:

[0005] How to detect the electrode potential of valve-regulated sealed lead-acid batteries?

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] In a first aspect, the present invention discloses a device for detecting the potential of a valve-regulated sealed lead-acid battery, comprising a valve-regulated sealed lead-acid battery, wherein the valve-regulated sealed lead-acid battery comprises a plurality of single-cell batteries connected in series, wherein two adjacent single-cell batteries are connected via a bus bar, and a safety valve hole is provided on the top of each single-cell battery;

[0008] Each bus is provided with a screw, which is inserted through the cover of the valve-regulated sealed lead-acid battery and extends to the outside of the cover; one end of the valve-regulated sealed lead-acid battery provided with a safety valve hole is provided with an acid pot filled with a colloidal sulfuric acid solution, and the acid pot is provided with a plurality of inserts corresponding to the safety valve holes; each safety valve hole is also provided with a beaker filled with a sulfuric acid solution, and each beaker is provided with a mercurous sulfate electrode and a salt bridge, wherein the other end of the salt bridge passes through the acid pot and its insert and extends to the corresponding safety valve hole and contacts with the internal acid solution of the valve-regulated sealed lead-acid battery.

[0009] In a further embodiment of the present invention, a sealant is provided at the connection between the screw and the cover of the valve-regulated sealed lead-acid battery.

[0010] In a further embodiment of the present invention, the screws are divided into two groups, and the screws in the same row are one group; one group of screws is marked as screws A, and the other group of screws is marked as screws B.

[0011] In a further embodiment of the present invention, the salt bridge is a colloidal sulfate salt bridge.

[0012] In a further embodiment of the present invention, the method for preparing the colloidal sulfate salt bridge comprises the following steps:

[0013] Step 1: Add the crushed SiO2 into a sulfuric acid solution with a concentration of 1.3-1.4 g / mL and mix well to form a colloid;

[0014] Step 2: introduce the colloid into a glass U-shaped tube and place it for 1-2 days to form a sulfuric acid colloidal salt bridge.

[0015] In a further embodiment of the present invention: in step 1, the amount of SiO2 added is 8-9% of the total mass of the sulfuric acid colloid, and the total mass of the sulfuric acid colloid is the sum of the masses of the sulfuric acid solution after adding SiO2.

[0016] In a further embodiment of the present invention, the concentration of the sulfuric acid solution in the beaker is 1.2-1.4 g / mL.

[0017] In a second aspect, the present invention also discloses a detection method for the potential detection device of the valve-regulated sealed lead-acid battery as described above, comprising the following steps: connecting the positive terminal-mercurous sulfate electrode or the screw-mercurous sulfate electrode or the negative terminal-mercurous sulfate electrode corresponding to the positive and negative electrodes of each single-cell battery to a potential measuring device respectively, so as to measure the positive and negative electrode potentials of the corresponding single-cell battery.

[0018] In a further embodiment of the present invention, when detecting the positive and negative electrode potentials of a single cell battery with a positive terminal, the positive terminal-mercurous sulfate electrode and the screw-mercurous sulfate electrode corresponding to the positive and negative electrodes of the single cell battery with a positive terminal are respectively connected to a potential measuring device, so that the positive and negative electrode potentials of the single cell battery at the positive terminal position of the valve-regulated sealed lead-acid battery can be measured;

[0019] In a further embodiment of the present invention, when detecting the positive and negative electrode potentials of a single cell battery with a negative terminal, the screw-mercurous sulfate electrode and the negative terminal-mercurous sulfate electrode corresponding to the positive and negative electrodes of the single cell battery with a negative terminal are respectively connected to a potential measuring device, so that the positive and negative electrode potentials of the single cell battery at the negative terminal position of the valve-regulated sealed lead-acid battery can be measured.

[0020] In a further embodiment of the present invention, when detecting the positive and negative electrode potentials of a single cell battery with a positive terminal and a negative terminal located in the middle, two sets of screw-mercurous sulfate electrodes corresponding to the positive and negative electrodes of the single cell battery to be detected are respectively connected to a potential measuring device, so that the positive and negative electrode potentials of the single cell battery can be measured.

[0021] Beneficial effects of the present invention:

[0022] 1. The detection device for the potential of a valve-regulated sealed lead-acid battery of the present invention builds a mercurous sulfate electrode, a salt bridge and an acid pot system between the positive and negative electrodes of a single cell in the valve-regulated sealed lead-acid battery and a beaker filled with sulfuric acid. It can conveniently and accurately measure the electrode potential of the internal formation process of the lead-acid battery online without dissecting the battery. The operation is simple and the battery is not easily damaged. It is easy to understand the electrode potential information during the internal formation process of the battery. It can be used to study and design the formation process and can also be used as a criterion for judging the internal formation effect.

[0023] 2. The detection method of the valve-regulated sealed lead-acid battery potential detection device of the present invention can measure the electrode potential data during the internal formation process of the valve-regulated sealed lead-acid battery, and combine the anatomical battery analysis, as well as the physical and chemical data such as the PbO2 content and the PbSO4 content, electron microscope observation, etc., to comprehensively analyze the internal formation effect of the battery, which has guiding significance for the research and design of the internal formation process of batteries of different models and structures. This test method facilitates in-depth understanding of the formation process and can be used as a criterion for judging the internal formation. On the basis of a perfect internal formation process, the electrode potential information of the battery in the formation process is measured as a standard, thereby judging the quality of the formation of a certain model of battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 1 is a schematic diagram of the structure of a device for detecting the potential of a valve-regulated sealed lead-acid battery in Embodiment 1 of the present invention;

[0026] Figure 2 The detection device for the potential of the valve-controlled sealed lead-acid battery in Embodiment 1 of the present invention is different from Figure 1 Structural diagram of angles;

[0027] Figure 3 It is a schematic structural diagram of the device for detecting the potential of a valve-regulated sealed lead-acid battery in Example 1 of the present invention after the acid pot is removed.

[0028] In the figure: 1. valve-regulated sealed lead-acid battery; 2. acid pot; 3. beaker; 4. salt bridge; 5. mercurous sulfate electrode; 6. screw A; 7. screw B. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] The present embodiment discloses a device for detecting the potential of a valve-regulated sealed lead-acid battery, comprising a valve-regulated sealed lead-acid battery 1. The valve-regulated sealed lead-acid battery 1 is a common battery type on the market, comprising 6 single-cell batteries connected in series, and two adjacent single-cell batteries are connected by a bus bar. Therefore, for a single single-cell battery, its positive electrode is also the negative electrode of the previous single-cell battery, and its negative electrode is also the positive electrode of the next single-cell battery; a safety valve hole is provided on the top of each single-cell battery, and among the two outermost single-cell batteries, the positive electrode of one single-cell battery is connected to the positive terminal, and the negative electrode of the other single-cell battery is connected to the negative terminal.

[0032] Each bus is inserted with screws, a total of 5 screws; the screws are inserted through the cover of the valve-regulated sealed lead-acid battery 1 and extend to the outside of the cover; sealant is provided at the connection between the screws and the cover of the valve-regulated sealed lead-acid battery 1 to seal the gap position to prevent acid overflow during the formation process, so as to maintain the sealing of the valve-regulated sealed lead-acid battery 1, thereby ensuring that the valve-regulated sealed lead-acid battery 1 can be normally vacuumed and filled with acid in the subsequent process.

[0033] Since the busbars are distributed at intervals at both ends of the six single cells in the valve-regulated sealed lead-acid battery 1, the positions of the screws are the same and are also distributed in two rows. For easy distinction, the screws are divided into two groups. The screws in the same row as the positive terminal and the negative terminal of the valve-regulated sealed lead-acid battery 1 are called screws B7, and the screws in the other row are called screws A6. There are two screws B7 and three screws A6.

[0034] The end of the valve-regulated sealed lead-acid battery 1 with a safety valve hole is provided with an acid pot 2 filled with colloidal sulfuric acid solution, and the bottom of the acid pot 2 is provided with 6 inserts, which are respectively inserted into the 6 safety valve controls, so that the acid pot 2 can be supported above the valve-regulated sealed lead-acid battery 1; the top of the acid pot 2 is also provided with 6 perforations corresponding to the inserts.

[0035] Each safety valve hole is also provided with a beaker 3 containing a sulfuric acid solution with a concentration of 1.2-1.4 g / mL through a colloidal sulfate bridge; the concentration of the sulfuric acid solution in the beaker 3 should not be too low to prevent the colloidal sulfuric acid in the acid pot from being introduced into the beaker 3; each beaker 3 is provided with a mercurous sulfate electrode 5 and a salt bridge 4, wherein the other end of the salt bridge 4 extends through the perforation at the top of the acid pot 2 and the cannula at the bottom to the corresponding safety valve hole and contacts with the internal acid solution of the valve-regulated sealed lead-acid battery 1 to prevent data errors caused by the concentration difference between the colloidal sulfuric acid in the valve-regulated sealed lead-acid battery 1 and the colloidal sulfuric acid in the acid pot 2; and the salt bridge 4 is a colloidal sulfuric acid salt bridge.

[0036] Specifically, the preparation method of the sulfuric acid colloidal salt bridge comprises the following steps:

[0037] Step 1: Add the crushed SiO2 into a sulfuric acid solution with a concentration of 1.3-1.4 g / mL and mix evenly to form a colloid; the amount of SiO2 added is 8-9% of the total mass of the sulfuric acid colloid, and the total mass of the sulfuric acid colloid is the sum of the masses of the sulfuric acid solution after adding SiO2.

[0038] Step 2: introduce the colloid into a glass U-shaped tube and place it for 1-2 days to form a sulfuric acid colloidal salt bridge.

[0039] The prepared proportional hydrochloride bridge can be used multiple times, and the glass material is not easy to deform, so the error caused by deformation can be reduced.

[0040] Example 2

[0041] The present embodiment discloses a detection method of the valve-regulated sealed lead-acid battery potential detection device described in Embodiment 1, comprising the following steps: connecting the positive terminal-mercurous sulfate electrode 5 or the screw-mercurous sulfate electrode 5 or the negative terminal-mercurous sulfate electrode 5 corresponding to the positive and negative electrodes of each single-cell battery to a potential measuring device, respectively, so as to measure the positive and negative electrode potentials of the corresponding single-cell battery.

[0042] Specifically, in this embodiment, when detecting the positive and negative electrode potentials of a single cell battery with a positive terminal, the positive terminal-mercurous sulfate electrode 5 and the screw A6-mercurous sulfate electrode 5 corresponding to the positive and negative electrodes of the single cell battery with a positive terminal (a single-stage battery at the outermost end) are respectively connected to the potential measuring device, and the positive and negative electrode potentials of the single cell battery at the positive terminal position of the valve-regulated sealed lead-acid battery 1 can be measured;

[0043] When detecting the positive and negative electrode potentials of a single cell battery with a negative terminal, the screw A6-mercurous sulfate electrode 5 and the negative terminal-mercurous sulfate electrode 5 corresponding to the positive and negative electrodes of the single cell battery with a negative terminal (the other single-stage battery at the outermost end) are respectively connected to the potential measuring device, and the positive and negative electrode potentials of the single cell battery at the negative terminal position of the valve-regulated sealed lead-acid battery 1 can be measured.

[0044] When detecting the positive and negative electrode potentials of the single cell battery with the positive terminal and the negative terminal located in the middle, the screw A6-mercurous sulfate electrode 5 and the screw B7-mercurous sulfate electrode 5 corresponding to the positive and negative electrodes of the single cell battery to be detected are respectively connected to the potential measuring device, and the positive and negative electrode potentials of the single cell battery can be measured.

[0045] Working principle of the present invention:

[0046] By measuring the positive and negative electrode potentials of each cell of the valve-regulated sealed lead-acid battery 1 during the internal formation process, the trend and range of the electrode potential changes of each cell during the formation process can be clearly compared, and the current battery formation process effect can be reflected by the size difference of the electrode potential of each cell; a smaller difference indicates that the difference between cells in the formation process is smaller, the overall uniformity of the battery is better, and the performance is better, but the corresponding formation process still needs to be combined with the anatomical analysis of the battery, physical and chemical data and other comprehensive analysis to draw a conclusion.

[0047] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A device for detecting the potential of a valve-regulated sealed lead-acid battery, comprising a valve-regulated sealed lead-acid battery 1, wherein the valve-regulated sealed lead-acid battery 1 comprises a plurality of single cells connected in series, wherein two adjacent single cells are connected via a bus bar, and a safety valve hole is provided on the top of each single cell; It is characterized in that Each bus is inserted with a screw, and the screw is inserted through the cover of the valve-regulated sealed lead-acid battery 1 and extends to the outside of the cover; the end of the valve-regulated sealed lead-acid battery 1 with a safety valve hole is provided with an acid pot 2 filled with a colloidal sulfuric acid solution, and the acid pot 2 is provided with a plurality of inserts inserted in a one-to-one correspondence with the safety valve holes; each safety valve hole is also correspondingly provided with a beaker 3 filled with a sulfuric acid solution, and each beaker 3 is provided with a mercurous sulfate electrode 5 and a salt bridge 4, wherein the other end of the salt bridge 4 passes through the acid pot 2 and its insert and extends to the corresponding safety valve hole and contacts with the internal acid solution of the valve-regulated sealed lead-acid battery 1.

2. The device for detecting the potential of a valve-regulated sealed lead-acid battery according to claim 1, characterized in that: Sealant is provided at the connection between the screw and the cover of the valve-regulated sealed lead-acid battery 1 .

3. The device for detecting the potential of a valve-regulated sealed lead-acid battery according to claim 2, characterized in that: The screws are divided into two groups, and the screws in the same row are one group; one group of screws is marked as screws A6, and the other group of screws is marked as screws B7.

4. The device for detecting the potential of a valve-regulated sealed lead-acid battery according to claim 1, characterized in that: The salt bridge 4 is a colloidal sulfuric acid salt bridge.

5. The device for detecting the potential of a valve-regulated sealed lead-acid battery according to claim 4, characterized in that: The preparation method of the sulfate colloidal salt bridge comprises the following steps: Step 1: Add the crushed SiO2 into a sulfuric acid solution with a concentration of 1.3-1.4 g / mL and mix well to form a colloid; Step 2: introduce the colloid into a glass U-shaped tube and place it for 1-2 days to form a sulfuric acid colloidal salt bridge.

6. The device for detecting the potential of a valve-regulated sealed lead-acid battery according to claim 5, characterized in that: In step 1, the amount of SiO2 added is 8-9% of the total mass of the sulfuric acid colloid, and the total mass of the sulfuric acid colloid is the sum of the masses of the sulfuric acid solution after SiO2 is added.

7. The device for detecting the potential of a valve-regulated sealed lead-acid battery according to claim 1, characterized in that: The concentration of the sulfuric acid solution in the beaker 3 is 1.2-1.4 g / mL.

8. A detection method for the detection device of the potential of a valve-regulated sealed lead-acid battery according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: connecting the positive terminal-mercurous sulfate electrode 5 or the screw-mercurous sulfate electrode 5 or the negative terminal-mercurous sulfate electrode 5 corresponding to the positive and negative electrodes of each single cell battery to a potential measuring device respectively, so as to measure the positive and negative electrode potentials of the corresponding single cell battery.

9. The detection method of the valve-regulated sealed lead-acid battery potential detection device according to claim 8, characterized in that: When detecting the positive and negative electrode potentials of a single cell battery with a positive terminal, the positive terminal-mercurous sulfate electrode 5 and the screw-mercurous sulfate electrode 5 corresponding to the positive and negative electrodes of the single cell battery with a positive terminal are respectively connected to the potential measuring device, so that the positive and negative electrode potentials of the single cell battery at the positive terminal position of the valve-regulated sealed lead-acid battery 1 can be measured; When detecting the positive and negative electrode potentials of a single cell battery with a negative terminal, the screw-mercurous sulfate electrode 5 and the negative terminal-mercurous sulfate electrode 5 corresponding to the positive and negative electrodes of the single cell battery with a negative terminal are respectively connected to the potential measuring device, and the positive and negative electrode potentials of the single cell battery at the negative terminal position of the valve-regulated sealed lead-acid battery 1 can be measured.

10. The detection method of the valve-regulated sealed lead-acid battery potential detection device according to claim 8, characterized in that: When detecting the positive and negative electrode potentials of the single cell battery with the positive terminal and the negative terminal located in the middle, the two sets of screw-mercurous sulfate electrodes 5 corresponding to the positive and negative electrodes of the single cell battery to be detected are respectively connected to the potential measuring device, and the positive and negative electrode potentials of the single cell battery can be measured.

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