A two-phase electrolyte lead-acid battery structure

Abstract

The utility model discloses a two -phase electrolyte lead -acid battery structure belongs to lead -acid battery technical field. It mainly provides a kind of lead-acid battery with two-phase electrolyte. Its main features are: the bottom surface of groove body is equipped with pole plate support column, the inner surface of groove cover is equipped with second liquid storage groove baffle, the positive electrode plate and negative electrode plate are installed between pole plate support column and second liquid storage groove baffle;The positive pole and negative pole are installed on the groove cover;The exhaust valve is installed on the groove cover;The liquid storage space of groove body below the lower end of second liquid storage groove baffle constitutes first liquid storage groove, and the liquid storage space of groove body above the upper end of second liquid storage groove baffle constitutes second liquid storage groove, and the volume ratio of first liquid storage groove and second liquid storage groove is 3:1;The electrolyte is 1:1 dilute sulfuric acid and cyclohexane. The utility model has the characteristics of simple structure, normal use of positive direction placement, inert protection of reverse placement and prolonging service life, and is mainly used for lead-acid battery with two-phase electrolyte.

Description

Technical Field

[0001] This utility model belongs to the field of lead-acid battery technology, specifically relating to a lead-acid battery with two-phase electrolyte. Background Technology

[0002] Lead-acid batteries are widely used energy storage devices that use dilute sulfuric acid as the electrolyte. Although the concentration range has been optimized to meet reaction requirements while ensuring safety and ease of maintenance, self-discharge behavior and electrolyte corrosion issues still affect battery life and cycle stability. Self-discharge refers to the capacity loss caused by internal electrochemical reactions in an open-circuit state. The main reason is that the spongy lead (Pb) active material at the negative electrode has a low potential and readily reacts with impurities in the electrolyte (such as Fe). 3+ Cu 2+ Cl - Micro-cell corrosion occurs due to various factors, including the formation of a PbSO4 passivation layer or PbO2 corrosion products. Electrolyte corrosion, on the other hand, is caused by the electrochemical corrosion of the alloy grid of a lead-acid battery during long-term use. This corrosion generates a PbSO4 passivation layer or PbO2 corrosion products, leading to grid expansion and shedding of active material, thus affecting the cycle performance of the lead-acid battery. Utility Model Content

[0003] To mitigate the self-discharge phenomenon and electrolyte corrosion problems of lead-acid batteries, this invention provides a lead-acid battery structural design with a two-phase electrolyte, which enables the lead-acid battery to be in an inert environment during non-operation periods, thereby reducing self-discharge and electrolyte corrosion problems and extending battery life.

[0004] The technical solution of this utility model is: a two-phase electrolyte lead-acid battery structure, including a tank body, a tank cover, a positive electrode plate, a negative electrode plate, a positive electrode post, a negative electrode post, an exhaust valve, and an electrolyte. The tank body has an electrode plate support post on its bottom surface that abuts against the lower ends of the positive and negative electrode plates; the tank cover has a second liquid storage tank baffle on its inner surface that abuts against the lower ends of the positive and negative electrode plates; the positive and negative electrode plates are mounted between the electrode plate support post and the second liquid storage tank baffle; the positive and negative electrode posts are mounted on the tank cover and connected to the positive and negative electrode plates respectively; the exhaust valve is mounted on the tank cover; the liquid storage space below the lower end of the second liquid storage tank baffle constitutes a first liquid storage tank, and the liquid storage space above the lower end of the second liquid storage tank baffle constitutes a second liquid storage tank; the volume ratio of the first liquid storage tank to the second liquid storage tank is 3:1; the electrolyte is a 1:1 mixture of dilute sulfuric acid and cyclohexane.

[0005] The exhaust valve described in the technical solution of this utility model is a two-way grooved exhaust valve.

[0006] The bidirectional grooved exhaust valve in the technical solution of this utility model is composed of an outer sealing cover, an inner sealing cover, and a connecting column for the inner and outer sealing covers; the connecting column for the inner and outer sealing covers is provided with a grooved exhaust hole, which matches the exhaust valve mounting hole on the groove cover, and its length is greater than the thickness of the groove cover.

[0007] The bidirectional grooved exhaust valve described in the technical solution of this utility model is a gravity-sealed exhaust valve.

[0008] The connecting column of the inner and outer sealing caps in the technical solution of this utility model is a rectangular body.

[0009] The dilute sulfuric acid in the technical solution of this utility model is 1.25 g / cm³. 3 dilute sulfuric acid.

[0010] In the technical solution of this utility model, the cyclohexane content is 0.778 g / cm³. 3 Cyclohexane.

[0011] In the technical solution of this utility model, the tank body is rectangular; the electrode support columns are spaced-apart electrode support columns; the second liquid storage tank baffle is spaced-apart liquid storage tank baffle; the materials of the tank body, electrode support columns, tank cover and second liquid storage tank baffle are acid-resistant and cyclohexane-resistant materials.

[0012] The acid- and cyclohexane-resistant material described in the technical solution of this utility model is PP plastic.

[0013] This utility model employs a two-phase electrolyte lead-acid battery structure comprising a tank body, a tank cover, a positive electrode plate, a negative electrode plate, a positive electrode post, a negative electrode post, an exhaust valve, and an electrolyte. The tank body has electrode plate support posts on its bottom surface that abut the lower ends of the positive and negative electrode plates. The tank cover has a second electrolyte storage tank baffle on its inner surface that abuts the lower ends of the positive and negative electrode plates. The positive and negative electrode plates are mounted between the positive and negative electrode plates. The positive and negative electrode posts are mounted on the tank cover and connected to the positive and negative electrode plates respectively. The exhaust valve is mounted on the tank cover. The lower end of the second electrolyte storage tank baffle... The liquid storage space in the tank body constitutes the first liquid storage tank, and the liquid storage space above the lower end of the baffle of the second liquid storage tank constitutes the second liquid storage tank. The volume ratio of the first liquid storage tank to the second liquid storage tank is 3:1. The electrolyte is a 1:1 mixture of dilute sulfuric acid and cyclohexane. Therefore, by rotating the battery, the orientation can be changed, allowing the electrode plate environment to switch between the inert protective solvent cyclohexane and the electrolyte dilute sulfuric acid. When discharge is required, the electrode plates are placed in dilute sulfuric acid for normal discharge. During non-operational time, the electrode plates are placed in the cyclohexane protective solution to avoid corrosion of the grid and active material by dilute sulfuric acid, thus extending the service life of the lead-acid battery.

[0014] This utility model features a simple structure, normal use when placed upright, inert protection when placed in reverse, and extended service life. It is mainly used in lead-acid batteries with two-phase electrolytes. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external shape of the tank body and tank cover of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the tank and the tank cover of this utility model.

[0017] Figure 3 This is a distribution diagram of the two-phase electrolyte in the upright state of this utility model.

[0018] Figure 4 This is a distribution diagram of the two-phase electrolyte in the inverted state of this utility model.

[0019] Figure 5 This is a schematic diagram of the external shape of the bidirectional groove-type exhaust valve of this utility model.

[0020] Figure 6 This is a schematic diagram of the structure of the bidirectional groove-type exhaust valve of this utility model.

[0021] Figure 7 This is a schematic diagram of the bidirectional grooved exhaust valve of this utility model in its upright position.

[0022] Figure 8 This is a schematic diagram of the bidirectional groove-type exhaust valve of the present invention when the battery is inverted.

[0023] In the diagram: 1-Electrode plate support column; 2-Second liquid storage tank baffle; 3-Two-way grooved vent valve; 4-First liquid storage tank; 5-Second liquid storage tank; 6-Dilute sulfuric acid; 7-Cyclohexane; 8-Inner sealing cap; 9-Outer sealing cap; 10-Groove vent. Detailed Implementation

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this utility model. For those skilled in the art, all other embodiments obtained without creative effort are within the scope of protection of this utility model.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] like Figure 1-8As shown, one embodiment of the two-phase electrolyte lead-acid battery structure of this utility model consists of a tank body, a tank cover, a positive electrode plate (not shown in the figure), a negative electrode plate (not shown in the figure), a positive electrode post, a negative electrode post, a bidirectional grooved exhaust valve, dilute sulfuric acid 6, and cyclohexane 7.

[0027] The tank is rectangular, with electrode support columns 1 on the bottom surface that abut the lower ends of the positive and negative electrode plates. Three electrode support columns 1 are spaced apart. The tank cover is rectangular and fits into the tank's ports. The cover has electrode mounting holes on both sides and an exhaust valve mounting hole in the center. The inner surface has a second liquid storage tank baffle 2 that abuts the lower ends of the positive and negative electrode plates. Three second liquid storage tank baffles 2 are spaced apart. Both the electrode support columns 1 and the second liquid storage tank baffle 2 have sufficient strength to support the weight of the lead-acid battery's electrodes. The positive and negative electrode plates are mounted between the electrode support columns 1 and the second liquid storage tank baffle 2. The positive and negative electrode posts are mounted on the tank cover and connected to the positive and negative electrode plates, respectively. The tank, electrode support columns 1, tank cover, and second liquid storage tank baffle 2 are made of PP plastic. After the positive electrode plate, negative electrode plate, positive electrode post and negative electrode post are installed, the liquid storage space of the tank below the lower end of the second liquid storage tank baffle 2 constitutes the first liquid storage tank 4, and the liquid storage space of the tank above the lower end of the second liquid storage tank baffle 2 constitutes the second liquid storage tank 5. The volume ratio of the first liquid storage tank 4 to the second liquid storage tank 5 is 3:1.

[0028] The electrolyte is a 1:1 mixture of dilute sulfuric acid 6 and cyclohexane 7. The concentration of dilute sulfuric acid 6 is 1.25 g / cm³. 3 The concentration of dilute sulfuric acid and cyclohexane 7 is 0.778 g / cm³. 3 The battery is assembled with the cap facing upwards. The positive and negative electrode plates are placed on the electrode support column 1 inside the first storage tank 4. The volume ratio of the positive and negative electrode plates, dilute sulfuric acid, and cyclohexane in the battery storage tank is 2:1:1. After pouring in a two-phase electrolyte solution of dilute sulfuric acid 6 / cyclohexane 7 with a volume ratio of 1:1, the battery is assembled. Since the density of cyclohexane 7 is lower than that of dilute sulfuric acid 6, the positive and negative electrode plates in the first storage tank 4 are immersed in the electrolyte solution dilute sulfuric acid 6. After rotating the battery 180° and placing the cap downwards, the weight of the positive and negative electrode plates is supported by the baffle 2 of the second storage tank, and the positive and negative electrode plates are immersed in cyclohexane 7.

[0029] The bidirectional grooved vent valve 3 is located on the battery compartment cover and consists of an outer sealing cover 9, an inner sealing cover 8, and a connecting post between the inner and outer sealing covers. The connecting post has a grooved vent hole 10. The connecting post is rectangular and mates with the vent valve mounting hole on the battery compartment cover, with a length greater than the thickness of the battery compartment cover. The bidirectional grooved vent valve 3 is a gravity-sealed vent valve. Using reinforced modified PP material, the bidirectional grooved vent valve can move up and down as the battery orientation changes. When the battery is upright with the battery compartment cover on top, the outer sealing cover 9 blocks the vent hole. During battery charging and discharging, the generated gas pressure will push open the outer sealing cover 9 to release the gas, ensuring battery safety. When the battery is inverted with the battery compartment cover on the bottom, gravity causes the inner sealing cover 8 to fit tightly against the compartment opening, blocking the vent hole and preventing gas or liquid leakage. The bidirectional grooved vent valve ensures normal venting during battery operation (charging and discharging) and maintains a tight seal during non-operational periods, preventing electrolyte loss.

[0030] In practical applications, the battery case is placed upright with the cover facing upwards. At this time, the battery plates are immersed in the electrolyte dilute sulfuric acid 6, and the battery is in a working state, no different from a conventional lead-acid battery. When gas is generated during charging and discharging, the internal gas pressure of the battery will push open the outer sealing cover 9 and release the gas through the grooved vent hole 10.

[0031] Rotate the battery 180° and place the case cover downwards. At this point, the plates are immersed in cyclohexane 7. Cyclohexane 7 does not react electrochemically with the components of the plates, providing an inert chemical environment to protect the plates from electrochemical corrosion. The bidirectional grooved vent valve 3 on the case cover is located below the battery. Under gravity, the inner sealing cap 8 of the bidirectional grooved vent valve 3 will block the vent hole, thus preventing electrolyte leakage and placing the battery in an inert protective state.

[0032] This invention utilizes a two-phase electrolyte solution in conjunction with an electrode support column and a second electrolyte reservoir baffle. By rotating the battery to change its orientation, the electrode environment can be switched between the inert protective solvent cyclohexane and the electrolyte dilute sulfuric acid. When discharge is required, the electrode is placed in dilute sulfuric acid for normal discharge, while during non-operational periods, the electrode is placed in the cyclohexane protective solution. This prevents the dilute sulfuric acid from corroding the grid and active materials, thus extending the lifespan of the lead-acid battery.

Claims

1. A two-phase electrolyte lead-acid battery structure, comprising a tank, a tank cover, a positive electrode plate, a negative electrode plate, a positive electrode post, a negative electrode post, a vent valve, and an electrolyte, characterized in that: The bottom surface of the tank is provided with an electrode support column (1) that abuts against the lower ends of the positive electrode plate and the negative electrode plate. The inner surface of the tank cover is provided with a second liquid storage tank baffle (2) that abuts against the lower ends of the positive electrode plate and the negative electrode plate. The positive electrode plate and the negative electrode plate are installed between the electrode support column (1) and the second liquid storage tank baffle (2). The positive electrode column and the negative electrode column are installed on the tank cover and are respectively connected to the positive electrode plate and the negative electrode plate. The exhaust valve is installed on the tank cover. The liquid storage space of the tank below the lower end of the second liquid storage tank baffle (2) constitutes the first liquid storage tank (4), and the liquid storage space of the tank above the lower end of the second liquid storage tank baffle (2) constitutes the second liquid storage tank (5). The volume ratio of the first liquid storage tank (4) to the second liquid storage tank (5) is 3:

1. The electrolyte is a dilute sulfuric acid (6) / cyclohexane (7) with a volume ratio of 1:

1.

2. The two-phase electrolyte lead-acid battery structure according to claim 1, characterized in that: The exhaust valve is a two-way grooved exhaust valve (3).

3. The two-phase electrolyte lead-acid battery structure according to claim 2, characterized in that: The bidirectional grooved exhaust valve (3) is composed of an outer sealing cover (9), an inner sealing cover (8), and an inner and outer sealing cover connecting column; the inner and outer sealing cover connecting column is provided with a grooved exhaust hole (10), which matches the exhaust valve mounting hole on the groove cover, and its length is greater than the thickness of the groove cover.

4. The two-phase electrolyte lead-acid battery structure according to claim 3, characterized in that: The bidirectional grooved exhaust valve (3) is a gravity-sealed exhaust valve.

5. The two-phase electrolyte lead-acid battery structure according to claim 4, characterized in that: The connecting column of the inner and outer sealing caps is rectangular.

6. A two-phase electrolyte lead-acid battery structure according to any one of claims 1-5, characterized in that: The dilute sulfuric acid (6) is 1.25 g / cm³. 3 dilute sulfuric acid.

7. A two-phase electrolyte lead-acid battery structure according to any one of claims 1-5, characterized in that: The cyclohexane (7) content was 0.778 g / cm³. 3 Cyclohexane.

8. The two-phase electrolyte lead-acid battery structure according to claim 6, characterized in that: The cyclohexane (7) content was 0.778 g / cm³. 3 Cyclohexane.

9. A two-phase electrolyte lead-acid battery structure according to any one of claims 1-5 and 8, characterized in that: The tank body is rectangular; the electrode support column (1) is an intermittently arranged electrode support column; the second liquid storage tank baffle (2) is an intermittently arranged liquid storage tank baffle; the materials of the tank body, electrode support column (1), tank cover and second liquid storage tank baffle (2) are acid-resistant and cyclohexane-resistant materials.

10. The two-phase electrolyte lead-acid battery structure according to claim 9, characterized in that: The acid- and cyclohexane-resistant material is PP plastic.

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