CN112242568B

CN112242568B - Polar plate connecting method of lead-acid storage battery

Info

Publication number: CN112242568B
Application number: CN202011023212.3A
Authority: CN
Inventors: 丁建华
Original assignee: Zhejiang Zhixing Technology Co ltd
Current assignee: Lead Lithium Zhixing Beijing Technology Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2022-05-31
Anticipated expiration: 2040-09-25
Also published as: CN112242568A

Abstract

The invention relates to a method for connecting polar plates of a lead-acid storage battery, which comprises the steps of inserting a polar lug of a polar group into a die; carrying out hot melting on the fusible metal in the mold; after the meltable metal is melted into a liquid state, cooling and solidifying the meltable metal and connecting the meltable metal and the tab into a whole; and (6) demolding. The manufacturing method of the invention has high efficiency and low cost.

Description

Polar plate connecting method of lead-acid storage battery

Technical Field

The invention relates to the field of lead-acid storage battery manufacturing.

Background

The connection technology of the lead-acid storage battery pole plate in the prior art adopts manual welding or a welding mode through a cast-weld machine, the manual welding can generate a large amount of toxic gas, health is not facilitated, production efficiency is seriously influenced, an empty welding phenomenon exists in the welding mode of the cast-weld machine on one hand, battery quality is influenced, and the cast-weld machine is low in efficiency and high in cost on the other hand.

Disclosure of Invention

In order to solve the technical problem, the invention provides a method for connecting polar plates of a lead-acid storage battery, which is characterized in that the polar lugs of a polar group are deeply inserted into a die; carrying out hot melting on the fusible metal in the mold; after the meltable metal is melted into a liquid state, cooling and solidifying; and (6) demolding.

Furthermore, the hot melting mode is to heat the fusible metal in the mold by electrifying.

Further, the hot melting mode is that the fusible metal in the mold is subjected to microwave heating.

Furthermore, the mode of inserting the pole lugs of the pole group into the mold is that the mold moves towards the pole lugs of the pole group.

Further, the mold is located below the tabs of the pole group.

Further, before the pole lugs of the pole group are deeply inserted into the die, the step of placing the pole group into a battery shell is carried out.

Further, the mold is mounted on the battery case.

Further, the fusible metal in the mold is lead.

Further, the mold is provided with a first cavity, the fusible metal is located in the first cavity, and the tab penetrates into the first cavity.

Further, the mold is provided with a first cavity and a second cavity, the fusible metal is located in the first cavity, and the tab penetrates into the second cavity. The first cavity is in communication with the second cavity.

The invention also discloses a die, a using method of the die and a welding method.

The pole plate connecting method has high efficiency and low cost.

Drawings

FIG. 1 is a schematic diagram of a lead acid battery of the present invention with the battery cover removed;

FIG. 2 is a schematic view of a single pole group of a lead acid battery of the present invention;

FIG. 3 is a cross-sectional view of the inventive die;

FIG. 4 is a schematic view of the tab welding of the lead acid battery of the present invention;

FIG. 5 is a schematic view of a mold installation according to another embodiment of the present invention;

fig. 6 is a schematic view of a mold according to another embodiment of the present invention.

Detailed Description

The invention is further described below with reference to the specific drawings.

As shown in fig. 1 and 2, the lead-acid storage battery of the invention comprises a battery shell 1, a pole group 2 arranged on the battery shell 1, a pole group 2 and a pole plate, wherein the pole plate is provided with a pole ear 3, and a bus bar 10 for connecting the pole ear.

As shown in fig. 3, the die 4 includes a die housing 5, a cavity 6 is disposed in the housing 5, the cavity 6 is used for receiving a body to be welded, such as the electrode group 2, a fusible metal 7 is disposed in the cavity 6, the fusible metal 7 is preferably a metal lead, a positive electrical connection port 8 and a negative electrical connection port 9 are formed on the housing 5 of the die 4, the positive electrical connection port 8 and the negative electrical connection port 9 are electrically connected to two

ends

7a and 7b of the fusible metal 7, respectively, and the positive electrical connection port 8 and the negative electrical connection port 9 are electrically connected to an external power source through a conducting wire. The metal lead can use lead bars or lead wires and other lead with different shapes and sizes according to the requirements, does not achieve better hot melting effect, has the cross section size as small as possible and the length size as large as possible, and thus has large resistance and good hot melting effect. As another embodiment, the positive electrical connection port 8 and the negative electrical connection port 9 on the housing 5 of the mold 4 may be replaced with a microwave source, such as an electromagnetic wave, or other source that heats and melts the metal, at the corresponding locations. In addition, in order to achieve a better heat fusing effect, a positive electrical connection port 8 and a negative electrical connection port 9 and a wave source can be arranged on the housing 5 of the die 4 at the same time to realize heat fusing of the metal lead.

As shown in fig. 4, a method for connecting pole plates of a lead-acid storage battery comprises the following steps that a pole lug 3 of a pole group penetrates into a cavity 6 of a mold 4 (metal lead 7 can be shown in fig. 4, and the pole lug 3 does not penetrate into the bottom of the cavity 6); the positive electric connection port 8 and the negative electric connection port 9 on the shell 5 are externally connected with a power supply (not shown in the figure) through leads, metal lead in the cavity 6 of the die 4 is electrified, the temperature of the metal lead is continuously increased due to the passing of current in the metal lead and the resistance of the metal lead, the metal lead is continuously melted into liquid lead, the melted liquid lead is fused with the pole lugs of the pole plates, the current passing pole lugs fused with the liquid lead and the surface resistance of the pole lugs passing the current are large, so that the temperature of the pole lugs passing the current is increased, lead oxide and lead sulfate on the surface of the pole lugs can fall off from the surfaces of the pole lugs, the melted liquid lead is favorably fused with the pole lugs of the pole plates, and in addition, the density of the lead oxide and the lead sulfate is lower than that of the liquid lead, and the lead oxide and the lead sulfate finally float on the surfaces of the liquid lead; disconnecting the external power supply; and demolding the mold 4 after the liquid lead is cooled and solidified with the pole lugs. Lead oxide and lead sulfate can be finally formed on the surface of the bus bar formed after liquid lead is cooled, and the electric conduction is basically not influenced.

The pole group 2 can be put into the battery shell 1 to be completely put into the groove, and then the tab 3 of the pole group 2 is deeply inserted into the cavity 6 of the die 4 to be die-welded; after the tab 3 of the electrode group 2 is welded and demoulded, the tab can be put into the battery shell 1 and all the tabs can be put into the slots. In addition, since the weight of the die is much lighter than the weight of the body to be welded, such as a pole group, the way in which the tab 3 of the pole group 2 of the present invention is inserted into the cavity 6 of the die 4 is preferably that the die 4 is moved in the direction of the tab 3 of the pole group 2, and further, in order to avoid the liquid lead from dripping onto the body to be welded, such as a pole group, during welding, the die 4 is preferably located below the tab 3 of the pole group 2. Of course, the manner of inserting the tab 3 of the electrode group 2 into the cavity 6 of the mold 4 may also be that the mold 4 moves from the top to the direction of the tab 3 of the electrode group 2, as shown in fig. 5 and 6, the mold 4 has a cavity 6, a fusible metal such as lead (not shown in the figures) is placed in the cavity 6, the cavity 6 has a bottom 12, a tab hole 11 is formed on the bottom 12, the mold 4 moves from the top to the direction of the tab 3 of the electrode group 2, that is, the tab 3 passes through the tab hole 11, and the bottom 12 of the cavity 6 realizes the isolation and sealing of the tab to be welded and the tab below. The mold 4 may be mounted on the battery case or on the body to be welded, such as a tab, or fixed by other means, as desired. According to the invention, the metal lead is electrified and melted, so that the melting of the metal lead is realized, and impurities such as lead oxide and lead sulfate on the surface of the tab are effectively removed, so that the welding effect is ensured, and the defect that the surface of the tab needs to be polished by a traditional welding machine is avoided.

Alternatively, the metallic lead in the cavity 6 of the mold 4 may be heated by microwaves to form liquid lead, and the object of the present invention may be achieved.

The polar plate connecting method of the lead-acid storage battery can also realize the aim of the invention by firstly carrying out hot melting on the fusible metal in the mould and then inserting the polar lugs of the polar group into the mould.

The method for using the mold of the present invention, the first embodiment method: a body to be welded, such as a tab, is inserted into a cavity of the mold; energizing a fusible metal, such as lead, disposed within the mold cavity to fuse; after the liquid state is formed, the power is cut off, and the die is demolded after the liquid state is cooled and solidified with the body to be welded. The second embodiment: a body to be welded, such as a tab, is inserted into a cavity of the mold; microwave melting of a fusible metal such as lead disposed within the mold cavity; and after the liquid state is formed, closing the microwave, cooling, solidifying the body to be welded and demolding. In addition, the use method of the mold can also melt the fusible metal arranged in the cavity of the mold; then the body to be welded is inserted into the cavity of the mould.

In addition, the welding method of the invention can be applied to welding the battery tab and can also be applied to other occasions needing welding. When the method is applied to other occasions, the body to be welded is only required to be inserted into the cavity of the die, namely the welding part of the body to be welded is ensured to be inserted into the cavity, and the fusible metal arranged in the cavity of the die is subjected to electrified hot melting or microwave hot melting to be melted into liquid; after the solid metal is melted into liquid state; and demolding after the liquid metal is cooled and solidified with the body to be welded. Also, the body to be welded is preferably inserted into the cavity of the mold by moving the mold from below to the body to be welded located above. In the welding method, the fusible metal arranged in the cavity of the mold can be melted; then the body to be welded is inserted into the cavity of the mould.

In addition, the fusible metal and the part to be welded of the body to be welded can be in the same cavity or different cavities, and as long as the cavities are communicated, the liquid metal can circulate and can realize welding, namely, the die is provided with a first cavity and a second cavity, the fusible metal such as lead is positioned in the first cavity, the part to be welded of the body to be welded is positioned in the second cavity, the first cavity is communicated with the second cavity, and the liquid metal can flow into the second cavity from the first cavity, so that the welding of the body to be welded is realized.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.

Claims

1. A method for connecting polar plates of a lead-acid storage battery is characterized in that the polar lugs of a polar group are deeply inserted into a die; electrifying positive and negative electric connection ports arranged on the mold, and carrying out hot melting on fusible metal lead in the mold; after the meltable metal lead is melted into a liquid state, cooling and solidifying the meltable metal lead and connecting the meltable metal lead and the tab into a whole; and (6) demolding.

2. The method of claim 1, wherein the tabs of the plate group are inserted into the mold in such a manner that the mold moves in the direction of the tabs of the plate group.

3. The method of claim 2, wherein the mold is positioned under the tabs of the plate groups.

4. The method of claim 1, further comprising the step of placing the plate pack in a battery case before inserting the tabs of the plate pack into the mold.

5. The method of claim 4, wherein the mold is mounted on the battery case.

6. The method of claim 1, wherein the mold has a first cavity and a second cavity, the fusible metal is located in the first cavity, the tab extends into the second cavity, and the first cavity is in communication with the second cavity.