Real-time sampling auxiliary tool for electrolyte in lead-acid storage battery and battery

Abstract

A real-time sampling auxiliary tool for electrolyte in a lead-acid storage battery and a battery, the auxiliary tool comprises a sampling tube assembly and a fixing plate used for fixing the sampling tube assembly, the sampling tube assembly comprises three sampling tubes, the three sampling pipes are a left sampling pipe for sampling on the left side of the unit cell, a middle sampling pipe for sampling in the middle of the unit cell and a right sampling pipe for sampling on the right side of the unit cell, and the left sampling pipe and the right sampling pipe are bent pipes and comprise vertical pipe sections and horizontal pipe sections connected to the lower parts of the vertical pipe sections; the middle sampling tube is a straight round tube; the fixed plate comprises two panels which are vertically and oppositely arranged and a top plate fixed at the tops of the two panels, a plurality of hollow grids are arranged on the surfaces of the panels, a base plate is arranged at the bottom of each panel, three round holes are formed in the top plate, and the three sampling pipes are sequentially placed in the three round holes; a guide ring piece is arranged in the containing chamber. According to the utility model, the density of electrolyte at different parts in the battery can be conveniently sampled in real time.

Description

Technical Field

[0001] This utility model relates to lead-acid batteries, specifically to an auxiliary tool for sampling the electrolyte inside a lead-acid battery and the battery itself. Background Technology

[0002] Lead-acid batteries are widely used in automobiles and communications. With the development of the automotive industry and the promotion of distributed power supply systems in communication systems, higher demands are being placed on lead-acid batteries, especially in terms of energy density, ease of maintenance, and safety. Currently, low-maintenance lead-acid batteries have become the mainstream product. These batteries are characterized by their lead-calcium alloy grids, with the entire electrode group submerged in the electrolyte, resulting in lower water decomposition and higher energy density.

[0003] However, existing lead-acid batteries still have some problems. First, lead-acid batteries produce hydrogen and oxygen during charging, which are released through the vent, potentially altering the electrolyte inside the battery. Second, the density of the electrolyte in lead-acid batteries changes continuously during charging and discharging, increasing during charging and decreasing during discharging. For stationary lead-acid batteries, the heavier electrolyte settles to the bottom during charging and the lighter electrolyte floats to the top during discharging. During charging and discharging, the electrolyte stratifies according to density, creating different potentials at the interfaces between the plates and electrolytes of different densities. This leads to increased self-discharge, higher temperature, accelerated corrosion and water loss, ultimately affecting the battery's lifespan.

[0004] To address these issues, researchers have been exploring new technological solutions. However, a key challenge in researching these new solutions is how to efficiently and conveniently extract electrolyte samples from different parts of a lead-acid battery during testing and use. This is crucial for verifying the effectiveness of the new technological solutions (which refer to improved verification methods, including but not limited to changes in electrolyte composition, lead paste formulation, electrode structure, and alloy composition; this tooling is essential for confirming the changes brought about by these improvements). Therefore, developing a method to accurately measure the electrolyte in different parts of a battery has become a vital approach to improving lead-acid battery performance and enhancing verification.

[0005] Currently, it is impossible to measure the electrolyte density in different parts of a lead-acid battery during use, making it difficult to accurately understand the physicochemical changes inside the battery. Therefore, there is an urgent need to develop a method for real-time sampling of electrolyte density in different parts of the battery, and to dynamically monitor the electrolyte during battery use. This would allow for a better understanding of the physicochemical changes inside the battery, enabling research on battery performance and lifespan, and becoming an important approach to improving lead-acid battery performance and validation. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and to provide an auxiliary tooling and battery for real-time sampling of electrolyte inside a lead-acid battery. Without changing the basic structure and use of the original battery, it can be directly placed inside the electrode group in a single cell of the battery compartment, which facilitates real-time sampling of electrolyte density in different parts of the battery.

[0007] The technical solution of this utility model is: a real-time sampling auxiliary tooling for electrolyte inside a lead-acid battery, comprising a sampling tube assembly and a fixing plate for fixing the sampling tube assembly. The sampling tube assembly includes three sampling tubes: a left sampling tube for sampling from the left side of a cell, a middle sampling tube for sampling from the middle of a cell, and a right sampling tube for sampling from the right side of a cell. The left and right sampling tubes are both bent tubes, including a vertical section and a horizontal section connected to the lower part of the vertical section; the middle sampling tube is a straight circular tube; the fixing plate covers... The device comprises two vertically opposite panels and a top plate fixed to the top of the two panels. The space between the two panels forms a receiving chamber for accommodating the sampling tube assembly. The surface of the panels has several perforated grids, and the bottom of the panels has a pad extending outward in a horizontal direction. The top plate has three round holes into which three sampling tubes are inserted in sequence. The receiving chamber is provided with a guide ring for guiding the movement direction of the sampling tube assembly. The guide ring includes three guide rings, with the middle portions of the left sampling tube, the middle sampling tube, and the right sampling tube respectively inserted into one guide ring.

[0008] The left and right sampling tubes are L-shaped round tubes.

[0009] It also includes clamps to prevent the sampling tube from falling into the lower part of the top plate, the clamps being set on the outer wall of the sampling tube on the upper part of the top plate.

[0010] The clamp is positioned near the upper end opening of the sampling tube.

[0011] The distance between the clamp and the upper end opening of the sampling tube is 8-12mm.

[0012] The three guide rings are fixed in sequence along the horizontal direction to the inner surface of the panel 1 directly below the three circular holes 5; the guide rings are made of a section of circular tube.

[0013] The lower horizontal sections of the left and right sampling tubes are placed outside the enclosure, and the panel width is smaller than the width of the electrode group.

[0014] The top of each of the three sampling tubes is a liquid extraction port, and the bottom of each of the three sampling tubes is a liquid inlet.

[0015] The three sampling tubes have graduation lines on their outer walls.

[0016] A lead-acid battery includes a battery case, in which a real-time sampling auxiliary tool for the electrolyte inside the lead-acid battery, as described above, is placed in the center of the electrode group within each cell of the battery case, and a pad is placed at the bottom of the electrode group.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. The electrolyte density is measured at different locations within the electrode group of a lead-acid battery, and then loaded into individual battery cells according to the battery manufacturing process. This enables accurate measurement of electrolyte density and solves the problem in existing technologies that cannot measure electrolyte density at different locations.

[0019] 2. The method of directly drawing electrolyte from the installed fixture by unscrewing the liquid hole plug eliminates the need for complex valve structures and has minimal impact on battery production.

[0020] 3. This tooling does not require any changes to the basic structure of existing lead-acid batteries and can be directly applied to the production process, demonstrating good practicality and economy. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the sampling tube.

[0022] Figure 2 This is a structural diagram of the fixed plate;

[0023] Figure 3 This is a schematic diagram of the sampling auxiliary tooling of this utility model;

[0024] Figure 4 This is a schematic diagram of the installation of the sampling auxiliary tooling and the electrode group of this utility model;

[0025] Figure 5 This is a schematic diagram of the electrode group inserted into a single cell of the battery slot according to this utility model;

[0026] Figure 6 yes Figure 5 A magnified view of a portion of the image;

[0027] Figure 7 This is a schematic diagram of the battery of this utility model;

[0028] In the diagram: 1. Panel; 2. Hollowed-out mesh; 3. Pad; 4. Top plate; 5. Round hole; 6. Left L-shaped round tube; 7. Straight round tube; 8. Right L-shaped round tube; 9. Guide ring; 10. Clamp; 11. Liquid extraction port; 12. Liquid inlet; 13. Scale line. Detailed Implementation

[0029] Figure 1-3This utility model discloses a sampling auxiliary fixture for measuring electrolyte in different parts of a lead-acid battery. The fixture is made of PP material. The fixture includes two panels 1 (140mm wide * 180mm high). Panel 1 has several perforated grids 2, allowing the electrolyte inside the battery to pass freely through. The bottom of panel 1 has an outwardly extending pad 3, which is placed at the bottom of the electrode group to prevent the fixture from moving up and down inside the electrode group. The two panels 1 are connected together by a top plate 4 to form a fixed plate. The top plate 4 has three circular holes 5, into which a left L-shaped tube 6, a straight tube 7, and a right L-shaped tube 8 are inserted sequentially. These three tubes are three sampling tubes. The lower horizontal sections of the left L-shaped tube 6 and the right L-shaped tube 8 are positioned outside panel 1. Guide rings 9 are provided on panel 1 directly below each of the three circular holes 5 to prevent horizontal displacement of the tubes during vertical movement. The left L-shaped circular tube 6 is used to measure the electrolyte in different parts of the left side of a single cell. The straight circular tube 7 is used to measure the electrolyte in different parts of the middle of a single cell. The right L-shaped circular tube 8 is used to measure the electrolyte in different parts of the right side of a single cell. Each of the three types of circular tubes has a clamp 10 located 10mm below the top, which prevents the circular tube from sinking into the circular hole 5 on the top plate 4 during use. Each of the three sampling tubes has a liquid extraction port 11 at the top and a liquid inlet 12 at the bottom. The three sampling tubes have graduation lines 13 on their bodies, allowing for a visual reading of the electrolyte level when adjusting the vertical position of the sampling tube. The panel width is smaller than the electrode group width.

[0030] Figure 4 In this invention, the sampling auxiliary tooling is installed inside the electrode group, electrolyte is added inside the battery, and a corresponding liquid hole plug is set on the cover of each cell.

[0031] Figure 5-7 In this invention, the battery includes an electrode group C, a battery compartment B, and a battery cover. A sampling auxiliary tool A is placed inside the electrode group in a single cell of the battery compartment B. It is used to sample the electrolyte in different parts of the battery in real time.

[0032] When it is necessary to measure the electrolyte in different parts of the battery, unscrew the liquid hole plug E on the battery cover D and use a syringe to draw electrolyte from the different round tube extraction ports 11. In this step, the positions of the three round tubes can be adjusted up and down according to the scale line 13 of the round tubes to extract electrolyte from different parts of the battery for analysis and research.

Claims

1. A real-time sampling auxiliary tooling for the electrolyte inside a lead-acid battery, characterized in that: The system includes a sampling tube assembly and a fixing plate for fixing the sampling tube assembly. The sampling tube assembly includes three sampling tubes: a left sampling tube for sampling from the left side of a single cell, a middle sampling tube for sampling from the middle of a single cell, and a right sampling tube for sampling from the right side of a single cell. The left and right sampling tubes are both bent tubes, including a vertical pipe section and a horizontal pipe section connected to the lower part of the vertical pipe section. The middle sampling tube is a straight circular tube. The fixing plate includes two vertically opposite panels (1) and a top plate (4) fixed to the top of the two panels (1). 1) The space between them forms a receiving chamber for accommodating the sampling tube assembly. The surface of the panel (1) has several hollow grids (2). The bottom of the panel (1) has a pad (3) extending outward in the horizontal direction. The top plate (4) has three round holes (5). Three sampling tubes are inserted into the three round holes (5) in sequence. The receiving chamber is provided with a guide ring for guiding the movement direction of the sampling tube assembly. The guide ring includes three guide rings. The middle parts of the left sampling tube (6), the middle sampling tube (7), and the right sampling tube (8) are respectively inserted into a guide ring.

2. The auxiliary tooling for real-time sampling of the electrolyte inside a lead-acid battery according to claim 1, characterized in that: The left and right sampling tubes are L-shaped round tubes.

3. The auxiliary tooling for real-time sampling of the electrolyte inside a lead-acid battery according to claim 1, characterized in that: It also includes a clamp (10) for preventing the sampling tube from falling into the lower part of the top plate (4), the clamp (10) being set on the outer wall of the sampling tube on the upper part of the top plate (4).

4. The auxiliary tooling for real-time sampling of the electrolyte inside a lead-acid battery according to claim 3, characterized in that: The clamp (10) is positioned near the upper end of the sampling tube opening.

5. The auxiliary tooling for real-time sampling of the electrolyte inside a lead-acid battery according to claim 3, characterized in that: The distance between the clamp (10) and the upper end of the sampling tube is 8-12mm.

6. The auxiliary tooling for real-time sampling of the electrolyte inside a lead-acid battery according to claim 1, characterized in that: The three guide rings are fixed in sequence along the horizontal direction to the inner surface of the panel (1) directly below the three circular holes (5); the guide rings are made of a section of circular tube.

7. The auxiliary tooling for real-time sampling of the electrolyte inside a lead-acid battery according to claim 1, characterized in that: The lower horizontal sections of the left and right sampling tubes are placed outside the enclosure, and the panel width is smaller than the width of the electrode group.

8. The auxiliary tooling for real-time sampling of the electrolyte inside a lead-acid battery according to claim 1, characterized in that: The top of the three sampling tubes is a liquid extraction port (11), and the bottom of the three sampling tubes is a liquid inlet (12).

9. The auxiliary tooling for real-time sampling of the electrolyte inside a lead-acid battery according to claim 1, characterized in that: The outer walls of the three sampling tubes are marked with graduation lines (13).

10. A lead-acid battery, characterized in that: The battery compartment includes a battery case, in which a real-time sampling auxiliary tool for the electrolyte inside the lead-acid battery as described in any one of claims 1-9 is placed in the middle of the electrode group in each cell of the battery case, and a pad (3) is placed at the bottom of the electrode group.

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