CN214952837U - Device for detecting density of active substance of polar plate - Google Patents
Device for detecting density of active substance of polar plate Download PDFInfo
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- CN214952837U CN214952837U CN202023055735.4U CN202023055735U CN214952837U CN 214952837 U CN214952837 U CN 214952837U CN 202023055735 U CN202023055735 U CN 202023055735U CN 214952837 U CN214952837 U CN 214952837U
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Abstract
The utility model discloses a device for detecting lead accumulator active material density, include: the weighing mechanism is used for weighing the polar plate to be measured, and a hanging piece used for hanging the polar plate to be measured is arranged on the weighing mechanism; the container is used for containing soaking liquid, the polar plate to be detected can be immersed into the soaking liquid during detection, and the top of the container is provided with a detachable sealing cover; and the negative pressure mechanism is used for pumping negative pressure to the container. The utility model is simple and convenient in operation, can be fast effectual go on surveying apparent density and true density to lead accumulator plate active material.
Description
Technical Field
The utility model relates to a lead accumulator technical field, concretely relates to a device for detecting polar plate active material density.
Background
The lead storage battery has a higher working voltage platform (compared with other water-based batteries), a wide use temperature range, a good cycle life (the cycle life is 300-5000 times), convenience in storage (particularly suitable for dry-type charge storage), and low cost, so that the lead storage battery is widely applied. But the volume and weight thereof have not been effectively improved. At present, the most common application fields of the lead storage battery comprise automobile start and stop, energy storage, standby power supply, power and the like. The lead-acid battery is improved to the greatest extent in the development process, namely the application of an oxygen recombination principle technology, and the negative oxygen absorption recombination technology is used for completing water regeneration with high efficiency, so that the aim of sealing without adding water is fulfilled, and the service life of the prepared maintenance-free battery can be as long as 4 years.
Composition of lead-acid battery: polar plate, baffle, casing, electrolyte, lead connecting strip, utmost point post etc.. The polar plate is divided into a positive plate and a negative plate, and both the positive plate and the negative plate are composed of a grid and active substances filled on the grid. During the charging and discharging process of the storage battery, the mutual conversion of electric energy and chemical energy is realized by the reaction of the active material of the polar plate and the sulfuric acid in the electrolyte. Typically, the active material on the positive plate is lead dioxide (PbO2), which is dark brown; the active material on the negative plate is sponge pure lead (Pb) in a grey color.
The density of the active material of the polar plate is particularly important for the overall performance of the storage battery, and the active material has low density, so that the active material is easily softened and falls off to cause the failure of the battery. Therefore, the performance and the service life of the storage battery can be evaluated by detecting the density of the active material of the plate.
As disclosed in patent specification No. CN111413261A, a method for detecting the porosity of an active material of a plate comprises the following steps: s1: weighing the mass m of the grid; s2: coating active substances on a grid to prepare a polar plate, drying, weighing the polar plate with the weight of M dry polar plates, wherein M1 is M dry polar plates-M grid; s3: after pure water is used for permeating the dried active substances on the polar plate, weighing M wet polar plates, wherein M2 is M wet polar plates-M grid; s4: the porosity of the active material on the plate is (M2-M1)/M1 × 100%.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a device for detecting polar plate active material density, can be fast effectual determines apparent density (active material's quality/(active material true volume + pore volume)) and true density to lead accumulator polar plate active material.
An apparatus for detecting active material density of a plate, comprising:
the weighing mechanism is used for weighing the polar plate to be measured, and a hanging piece used for hanging the polar plate to be measured is arranged on the weighing mechanism;
the container is used for containing soaking liquid, the polar plate to be detected can be immersed into the soaking liquid during detection, and the top of the container is provided with a detachable sealing cover;
and the negative pressure mechanism is used for pumping negative pressure to the container.
According to the scheme, the density of the active substance of the polar plate to be detected is calculated by measuring the dry weight and the wet weight (saturated weight) of the polar plate to be detected before and after soaking in liquid and the weight of the grid of the polar plate to be detected, and in addition, the negative pressure is pumped out of the container when the polar plate to be detected is soaked through the negative pressure mechanism, so that the air in the polar plate is discharged, and the error is reduced.
Preferably, the hanging piece is a section of hanging rope penetrating through the sealing cover. And a lifting mechanism for driving the container to lift is arranged below the container.
When the dry weight of the polar plate to be measured is measured, the lifting mechanism descends, so that the polar plate to be measured is not contacted with the soaking liquid in the container, and when the wet weight of the polar plate to be measured is measured, the lifting mechanism ascends, so that the polar plate to be measured is immersed in the soaking liquid, the container is sealed, and meanwhile, the hanging rope and the sealing cover are sealed to prevent gas from entering.
Further preferably, the lifting mechanism is a scissor lift. The operation is convenient.
Preferably, the hanging piece is two sections of hanging ropes, one section of the hanging ropes is fixed on the weighing mechanism, and the other section of the hanging ropes is fixed at the bottom of the sealing cover.
When the dry weight of the polar plate to be measured is measured, the polar plate to be measured is hung on a hanging rope on the weighing mechanism, when the polar plate to be measured is soaked, the polar plate to be measured is hung on a hanging piece at the bottom of the sealing cover, the polar plate to be measured is immersed in the soaking liquid, then negative pressure is pumped, when the wet weight of the polar plate to be measured is measured, the polar plate to be measured is taken down and is hung on the hanging rope on the weighing mechanism again.
Preferably, the container is provided with a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is used for being connected with a liquid storage tank, the liquid outlet pipe is used for being connected with a waste liquid tank, and valves are arranged on the liquid inlet pipe and the liquid outlet pipe and used for discharging waste liquid of the container and cleaning the container.
Preferably, the negative pressure mechanism includes a negative pressure pipe communicating with the container and a negative pressure generating device connected to the negative pressure pipe.
The utility model has the advantages that:
the operation is simple and convenient, and the air bubbles in the polar plate can be pumped out by adding the negative pressure mechanism, so that the measurement precision is greatly improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
As shown in fig. 1, the device for detecting the density of the active material of the plate comprises a weighing mechanism 1, a container 2 and a negative pressure mechanism 3; wherein, the weighing mechanism 1 is provided with a hanging piece 4 for hanging the polar plate to be measured, the hanging piece 4 can adopt a rope or a hook; the container 2 contains the immersion liquid, and the top of the container 2 is provided with a detachable sealing cover 21.
In this embodiment, the container 2 is provided with a liquid inlet pipe 22 and a liquid outlet pipe 23, the liquid inlet pipe 22 is communicated with a liquid storage tank (not shown in the figure), and the liquid outlet pipe 23 is communicated with a waste liquid tank (not shown in the figure) and used for discharging waste liquid of the container 2 and cleaning the container 2. The liquid inlet pipe 22 and the liquid outlet pipe 23 are correspondingly provided with valves.
The negative pressure mechanism 3 includes a negative pressure pipe 31 communicating with the container 2 and a negative pressure generating device 32 connected to the negative pressure pipe 31.
In some alternative embodiments, the hanging member 4 is a section of hanging rope passing through the sealing cover 21, and the lifting mechanism 5 for driving the container 2 to lift is arranged below the container 2. When the dry weight of the polar plate to be measured is measured, the lifting mechanism 5 descends, so that the polar plate to be measured is not contacted with the soaking liquid in the container 2, and when the wet weight of the polar plate to be measured is measured, the lifting mechanism ascends, so that the polar plate to be measured is immersed in the soaking liquid, the container 2 is sealed, and meanwhile, the hanging rope and the sealing cover 21 are sealed to prevent gas from entering. Wherein the lifting mechanism 5 is a scissor-fork type lifting platform.
In other alternative embodiments, the hanging member 4 is a two-piece hanging rope, one of which is fixed on the weighing mechanism 1, and the other of which is fixed at the bottom of the sealing cover 21. When measuring the dry weight of the polar plate to be measured, the polar plate to be measured is hung on the hanging rope on the weighing mechanism 1, when soaking, the polar plate to be measured is hung on the hanging rope at the bottom of the sealing cover 21, and after the polar plate to be measured is immersed in the soaking liquid, negative pressure is pumped out, and when measuring the wet weight of the polar plate to be measured, the polar plate to be measured is taken down and is hung on the hanging rope on the weighing mechanism 1 again.
The method for detecting the density of the active substances of the polar plate by using the device comprises the following steps:
(1) suspending the polar plate to be measured on a weighing mechanism 1, stabilizing for 2-15 min, and recording the dry weight m0；
(2) Immersing the polar plate to be measured in the soaking liquid, covering the sealing cover 21, pumping negative pressure for 10-30 min, opening the sealing cover 21, recording the reading after the reading is stable, and obtaining the saturated weight m of the polar plate to be measured in the soaking liquid1；
(3) Recording the weight m of the grid in the polar plate to be measured2；
(4) Calculated density ρ ═ m0-m2)/[(m0-m1)-(m2/11.34)。
Wherein m is0-m2The value of (b) is the mass of the active substance; m is0-m1The value of (A) is the volume of active substance (it should be divided by the density of water, 1g/cm3, if other liquids are used, by the density value of the corresponding liquid); m is211.34 is the volume occupied by the grid; (m)0-m1)-(m2The value of/11.34) is the active substance volume.
Claims (7)
1. An apparatus for detecting the density of an active material of a plate, comprising:
the weighing mechanism is used for weighing the polar plate to be measured, and a hanging piece used for hanging the polar plate to be measured is arranged on the weighing mechanism;
the container is used for containing soaking liquid, the polar plate to be detected can be immersed into the soaking liquid during detection, and the top of the container is provided with a detachable sealing cover;
and the negative pressure mechanism is used for pumping negative pressure to the container.
2. The device of claim 1, wherein the hanging member is a length of hanging rope that passes through the sealing cover.
3. The device of claim 1, wherein the hanging member is a two-piece hanging rope, one of which is fixed to the weighing mechanism and the other of which is fixed to the bottom of the sealing cover.
4. The device of claim 1, wherein a lifting mechanism for driving the container to lift is arranged below the container.
5. The apparatus of claim 4, wherein the lifting mechanism is a scissor lift table.
6. The apparatus of claim 1, wherein the container is provided with a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is used for connecting a liquid storage tank, the liquid outlet pipe is used for connecting a waste liquid tank, and the liquid inlet pipe and the liquid outlet pipe are provided with valves.
7. The apparatus of claim 1, wherein the negative pressure mechanism comprises a negative pressure tube in communication with the container and a negative pressure generating device connected to the negative pressure tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023055735.4U CN214952837U (en) | 2020-12-17 | 2020-12-17 | Device for detecting density of active substance of polar plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023055735.4U CN214952837U (en) | 2020-12-17 | 2020-12-17 | Device for detecting density of active substance of polar plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214952837U true CN214952837U (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023055735.4U Active CN214952837U (en) | 2020-12-17 | 2020-12-17 | Device for detecting density of active substance of polar plate |
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| Country | Link |
|---|---|
| CN (1) | CN214952837U (en) |
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- 2020-12-17 CN CN202023055735.4U patent/CN214952837U/en active Active
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