阅读说明：本技术 一种蓄电池极板 (Storage battery polar plate ) 是由 黎福根 罗继 汤代早 于 2019-11-26 设计创作，主要内容包括：本发明涉及一种蓄电池极板,包括极耳、极板基体、活性物质,其特征在于,所述极耳和极板基体的材质均为纯度为99.99%的纯铅,所述极耳和极板基体是通过铅条或铅板冲压而成的,所述活性物质通过电化学腐蚀生成,由极板基体通过早期小电流、中期过度放电和反向充电相结合的充放电方式生成；所述极耳的厚度大于极板基体的厚度；所述活性物质通过电化学腐蚀自然生成。本发明大大简化了生产流程,减少极板制作当中的能耗和环境污染,有效防止极板活性物质的脱落,提升了蓄电池的性能及寿命。(The invention relates to a storage battery polar plate, which comprises a polar lug, a polar plate matrix and an active substance, and is characterized in that the polar lug and the polar plate matrix are both made of pure lead with the purity of 99.99 percent, the polar lug and the polar plate matrix are formed by stamping a lead strip or a lead plate, and the active substance is generated by electrochemical corrosion and is generated by the polar plate matrix through a charging and discharging mode combining early small current, middle-term overdischarge and reverse charging; the thickness of the tab is greater than that of the polar plate substrate; the active material is naturally generated by electrochemical corrosion. The invention greatly simplifies the production flow, reduces the energy consumption and environmental pollution in the manufacturing of the polar plate, effectively prevents the active substances of the polar plate from falling off, and improves the performance and the service life of the storage battery.)

1. The utility model provides a storage battery polar plate, includes positive plate, negative plate, positive plate, negative plate constitute by utmost point ear, polar plate base member, active material, the upper portion of polar plate base member links to each other with utmost point ear, the surface of polar plate base member is covered with active material, its characterized in that: the tab and the polar plate substrate are made of metal lead by casting or stamping, and the active substance is generated by electrochemical corrosion; the electrochemical corrosion refers to that the polar plate matrix generates active substances through the following charge-discharge process, and the charge-discharge process comprises the following steps:

a1, connecting a positive plate and a negative plate of the storage battery with a positive plate and a negative plate of a charge and discharge machine respectively;

a2, pouring the electrolyte into the storage battery, and standing for 0.3 ~ 0.8.8 h;

a3, 0.12 ~ 0.15.15A/cm²Current charging, wherein the charging time is 1 ~ 16 h;

a4 at 0.2 ~ 0.3.3A/cm²Discharging with current for 2.5 ~ 3.5.5 h;

a5 repeating the above steps A3 and A4 three times, and then adding 0.2 ~ 0.25.25A/cm²Current charging, charging time 14 ~ 18 h;

a6, setting the charger to be in a reverse charging mode, and controlling the charging mode to be in a range of 0.1 ~ 0.15.15A/cm²The current is reversely charged for 16 ~ 20 h;

a7 at 0.2 ~ 0.25.25A/cm²Current positive charging, charging time 20 ~ 24 h;

and A8, repeating the step A6 and the step A7 three times, and finishing charging.

2. A battery plate according to claim 1, wherein: the pole ear and the pole plate matrix are formed by rolling and pressing a lead strip or a lead plate made of pure lead and then cutting the lead strip or the lead plate by a blanking die.

3. A battery plate according to claim 2, wherein: the material of the pole ear and the pole plate base body is pure lead with the purity of 99.99%, and the pole ear and the pole plate base body are formed by punching a lead strip or a lead plate.

4. The accumulator plate of claim 1 or 2, characterized in that the junction of the tab and the plate base is designed with a transition fillet, the thickness of the plate base is 0.01 ~ 0.3.3 mm, and the thickness of the tab is 10% ~ 50% thicker than the plate base.

5. A battery plate according to claim 1, wherein: the active substance is generated by directly electrochemically corroding the substrate of the polar plate, or is generated by pretreating the substrate of the polar plate by a corrosive agent and a spraying process in advance and then electrochemically corroding the pretreated substrate, wherein the active substance formed by the substrate of the polar plate on the positive electrode is PbO₂The active material formed on the negative electrode of the plate substrate is sponge Pb.

Technical Field

The invention belongs to the technical field of storage batteries, and particularly relates to a storage battery polar plate.

Background

The existing accumulator plate comprises a plate grid and an active substance, wherein the plate grid is a pre-made plate grid mould which comprises a transverse rib, a vertical rib and a frame rib, a lead-calcium alloy or a lead-antimony alloy is cast by a huge plate casting device after being melted at high temperature, the high-temperature melting of the lead alloy is a process with high power consumption, and partial lead dust and lead smoke are discharged into the air to pollute the air, so that the physical and mental health of a producer is greatly influenced.

Disclosure of Invention

The invention aims to simplify the process flow and shorten the production period, and provides the storage battery plate which is environment-friendly, energy-saving and consumption-reducing.

The invention is realized by the following technical scheme:

the utility model provides a storage battery polar plate, includes positive plate, negative plate, positive plate, negative plate constitute by utmost point ear, polar plate base member, active material, the upper portion of polar plate base member links to each other with utmost point ear, the surface of polar plate base member is covered with active material, its characterized in that, utmost point ear and polar plate base member are formed through the mode preparation of casting or punching press by metallic lead, active material passes through electrochemical corrosion and generates.

The electrochemical corrosion refers to that the polar plate matrix generates active substances through the following charge-discharge process, and the charge-discharge process comprises the following steps:

a1, connecting a positive plate and a negative plate of the storage battery with a positive plate and a negative plate of a charge and discharge machine respectively;

a2, pouring the electrolyte into the storage battery, and standing for 0.3 ~ 0.8.8 h;

a3, 0.12 ~ 0.15.15A/cm²Current charging, wherein the charging time is 1 ~ 16 h;

a4 at 0.2 ~ 0.3.3A/cm²Discharging with current for 2.5 ~ 3.5.5 h;

a5 repeating the above steps A3 and A4 three times, and then adding 0.2 ~ 0.25.25A/cm²Current charging, charging time 14 ~ 18 h;

a6, setting the charger to be in a reverse charging mode, and controlling the charging mode to be in a range of 0.1 ~ 0.15.15A/cm²The current is reversely charged for 16 ~ 20 h;

a7 at 0.2 ~ 0.25.25A/cm²Current positive charging, charging time 20 ~ 24 h;

and A8, repeating the step A6 and the step A7 three times, and finishing charging.

Furthermore, the pole ear and the pole plate base body are formed by rolling and pressing a lead strip or a lead plate made of pure lead and then cutting the lead strip or the lead plate by a blanking die.

Furthermore, the lug and the polar plate base body are both made of pure lead with the purity of 99.99%, and the lug and the polar plate base body are formed by punching a lead strip or a lead plate.

Furthermore, a transition fillet is designed at the joint of the lug and the pole plate base body, the thickness of the pole plate base body is 0.01 ~ 0.3.3 mm, and the thickness of the lug is 10% ~ 50% thicker than that of the pole plate base body.

Further, the active substance is generated by directly electrochemically etching the substrate of the polar plate, or is generated by pre-treating the substrate of the polar plate with an etchant and a spraying process and then electrochemically etching the substrate, and the active substance formed by the substrate of the polar plate on the positive electrode is PbO₂The active material formed on the negative electrode of the plate substrate is sponge Pb.

The active substance is generated by a polar plate substrate through a specific charging and discharging process, wherein the specific charging and discharging process adopts a charging and discharging mode of early low-current charging, combination of medium-term over-discharge and reverse charging and final high-current forward charging.

The invention has the following technical effects:

the invention adopts early small current charging, medium-term over-discharging and reverse chargingAnd a charging and discharging mode of large-current positive charging in the last stage is combined. Before electrolyte is added, the positive and negative plates are only a thin lead plate substrate without active substances, and after contacting the electrolyte, the positive and negative plates chemically react with sulfuric acid to generate PbSO₄Due to the formation of PbSO₄The amount of PbSO is very small, so that the battery can be charged with only a small current in the early stage to generate PbSO₄Under the electrochemical action, the positive electrode is quickly converted into a positive electrode active substance PbO₂And the anode active material is rapidly converted into spongy Pb of the anode active material at the anode. If too large current is used, not only the waste of electric energy is caused, but also the impact is caused to the active material on the surface of the polar plate. PbSO generated by reaction of the substrate of the electrode plate with sulfuric acid₄The amount of the positive electrode active material PbO is limited, so that overdischarge, which is a positive electrode active material produced during charging, and reverse charging are used in the middle stage of charge and discharge₂And the spongy Pb of the negative electrode is completely converted into PbSO₄The purpose of the reverse charging is to further generate excessive PbSO on the substrate₄Increasing PbSO₄The formation rate of the positive electrode active material is reduced, and the passivation effect generated during the positive charging is eliminated. Finally, a relatively large current is adopted for positive charging, so that a large amount of generated PbSO is generated₄Is converted into positive active material PbO again₂And a negative electrode active material sponge Pb. The active substance is generated more than once according to the specific charging and discharging process which is circulated continuously, the charging and discharging process not only can shorten the charging time, reduce the power consumption and reduce the cost, but also can form a very compact active substance layer with very good activity and difficult shedding on the surface of the polar plate matrix after repeated charging and discharging.

According to the invention, the lead block is rolled into a lead belt with a certain thickness and then is pressed and sheared into the polar plate substrate, and the positive and negative active substances are naturally formed on the surface of the polar plate substrate through repeated charging and discharging, are very compact and are not easy to fall off. The invention eliminates the processes of grid making, paste mixing, paste coating, polar plate drying and curing and the like in the prior art, does not need to cast a grid, fill active substances and cure polar plates, greatly simplifies the production flow, improves the production speed, greatly reduces the production cost, reduces the energy consumption and environmental pollution in the polar plate making, effectively prevents the polar plate active substances from falling off, has very large specific surface area, and greatly improves the performance and the service life of the storage battery.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a right side view of the present invention.

In the drawings, 1: a tab, 2: transition fillet, 3: plate substrate, 4: an active substance.

Detailed Description

As shown in fig. 1 and 2, the battery plate comprises a positive plate and a negative plate, wherein the positive plate and the negative plate are both composed of a tab, a plate substrate and an active substance, the upper part of the plate substrate is connected with the tab, and the surface of the plate substrate is full of the active substance.

The material of the pole ear and the pole plate base body is No. 1 electrolytic lead with the purity of 99.99 percent, and the pole ear and the pole plate base body do not contain rare earth metal components such as calcium, tin, aluminum, cerium and the like. The pole ear and the pole plate base body are made of metal lead by casting or stamping. Preferably, the tab and the plate substrate are stamped from a lead strip or plate. Preferably, the tab and the polar plate substrate are formed by rolling and pressing a lead strip or a lead plate made of pure lead and then cutting the lead strip or the lead plate by a blanking die.

Preferably, a transition fillet is designed at the joint of the lug and the pole plate base body, the thickness of the pole plate base body is 0.01 ~ 0.3mm, the thickness of the lug is 10% ~ 50% thicker than that of the pole plate base body, the lug is connected with the pole plate base body through the transition fillet, and a lead belt is mechanically rolled and sheared for one-time forming.

The active substance is generated on the surface of the polar plate substrate through electrochemical corrosion, or is generated by electrochemical corrosion after the polar plate substrate is pretreated by a corrosive agent and a spraying process in advance, and the active substance formed on the positive electrode by the polar plate substrate is PbO₂The active material formed on the negative electrode of the electrode plate base is sponge-like Pb.

Preferably, the active material is generated from the plate substrate by a specific charge-discharge schedule, and the specific charge-discharge schedule is a charge-discharge mode combining early low current, over-discharge and reverse charge.

The specific charging and discharging system comprises the following steps:

and A1, connecting the positive plate and the negative plate of the storage battery with the positive plate and the negative plate of the charge and discharge machine respectively.

A2, pouring electrolyte into the accumulator, standing for 0.3 ~ 0.8.8 h, wherein the electrolyte has the density of 1.02 ~ 1.15.15 g/cm³Dilute sulfuric acid.

A3, 0.12 ~ 0.15.15A/cm²And (4) current charging for 1 ~ 16 h.

A4 at 0.2 ~ 0.3.3A/cm²Discharging current for 2.5 ~ 3.5.5 h.

A5 repeating the above steps A3 and A4 three times, and then adding 0.2 ~ 0.25.25A/cm²Current charging, charging time 14 ~ 18 h.

A6, setting the charger to be in a reverse charging mode, and controlling the charging mode to be in a range of 0.1 ~ 0.15.15A/cm²The current is reversely charged, and the charging time is 16 ~ 20 h.

A7 at 0.2 ~ 0.25.25A/cm²The current charges in the forward direction for a charging time of 20 ~ 24 h.

And A8, repeating the step A6 and the step A7 three times, and finishing charging.

The polar plate substrate of the invention is put into sulfuric acid solution to react with sulfuric acid to generate PbSO₄In the charged state, the positive electrode forms PbO₂The negative electrode forms spongy Pb, and the positive electrode and the negative electrode are converted into PbSO under the discharge conversion state₄After repeated charge and discharge, an active substance which is very compact, very good in activity and not easy to fall off is formed on the surface of the polar plate matrix.

The invention provides a storage battery pole plate, which does not need to cast a grid, fill active substances and solidify the pole plate. The production process is greatly simplified, the energy consumption and the environmental pollution in the manufacturing of the polar plate are reduced, the falling of active substances of the polar plate is effectively prevented, the specific surface area of the polar plate is very large, the performance and the service life of the storage battery are greatly improved, the method is suitable for industrial production, and the cost is saved for enterprises.