CN216540798U

CN216540798U - Die for cast welding of tab

Info

Publication number: CN216540798U
Application number: CN202122377440.7U
Authority: CN
Inventors: 卢军; 卫鹏; 黄盖盖; 石东亮
Original assignee: Jiyuan Wanyang Green Energy Co ltd
Current assignee: Jiyuan Wanyang Green Energy Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-05-17
Anticipated expiration: 2031-09-29

Abstract

A die for cast-weld of a tab comprises a body, wherein a plurality of bus bar grooves are arranged on the body, the size and the position of the bus bar grooves on the body are set according to the thermal expansion coefficient of the material of the body, so that the bus bar grooves can reach the design standard under the cast-weld environment, a first positioning hole is arranged in the middle of the body, a standby positioning hole and a strip-shaped second positioning hole are respectively arranged on two sides of the body, a plurality of reinforcing ribs which are crossed vertically and horizontally are arranged on the back surface of the body, air holes are respectively arranged on the reinforcing ribs, the expansion amount is taken into consideration when the bus bar grooves are designed according to the material of the die and the actual temperature of the working environment of the die, so that under the environment, the positions of the bus bar grooves and the actual positions of the tabs are consistent, the phenomenon of bare-welding of the tabs cannot occur, meanwhile, a plurality of reinforcing ribs are designed on the back of the die, and the die can be ensured not to deform under the high-temperature environment, the service life of the die is prolonged.

Description

Die for cast welding of tab

The technical field is as follows:

the utility model belongs to the technical field of cast welding of tabs of storage batteries, and mainly relates to a die for cast welding of the tabs.

The background art comprises the following steps:

in the production process of the storage battery, a tab cast-weld process is performed, wherein tab cast-weld refers to orderly welding a positive tab and a negative tab of a polar plate through a bus bar, the step is realized in a welding-assistant machine, a mold is usually used for immersing into lead liquid, the lead liquid can be stored in a bus bar groove in the mold, then the tab is immersed into the lead liquid in the mold, the tab can be melted at high temperature and mutually melted with the lead liquid, and finally the tab and the bus bar are welded.

The existing die is made of metal materials, the working environment is at high temperature, and due to the expansion caused by heat and contraction caused by cold, on one hand, the die is deformed to influence the welding effect, on the other hand, when the die is designed, the positions of the bus bar grooves are well designed, but after the bus bar grooves are immersed in lead liquid, the bus bar grooves can expand, so that the positions of the bus bar grooves can slightly deviate, and finally, the lugs can be partially exposed during welding, cannot be completely covered by the bus bars, and the defective rate is high.

The utility model has the following contents:

in order to overcome the defects, the utility model provides a die for cast welding of a tab.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides an used mould of utmost point ear cast joint, includes the body, is equipped with a plurality of busbar recesses on the body, and the size and the position of busbar recess on the body will be set for according to the coefficient of thermal expansion of body material, make the busbar recess can reach the design standard under the cast joint environment, and the middle part of body is equipped with first locating hole, and the both sides of body are equipped with reserve locating hole and banding second locating hole respectively, and the back of body is equipped with a plurality of strengthening ribs that move about freely and quickly alternately, all is equipped with the bleeder vent on the strengthening rib.

The first positioning hole, the second positioning hole and the standby positioning hole are positioned on the transverse middle line of the body.

The longitudinal two sides of the body are provided with symmetrical inclined planes, and the two sides of each inclined plane are provided with a plurality of hanging lug fixing holes.

Due to the adoption of the technical scheme, the utility model has the following advantages:

according to the die for cast-weld of the tabs, provided by the utility model, the expansion amount is taken into consideration when the bus bar groove is designed according to the material of the die and the actual temperature of the working environment of the die, so that the position of the bus bar groove is consistent with the position of the actual tab under the environment, the phenomenon of bare-welding of the tab cannot occur, and meanwhile, a plurality of reinforcing ribs are designed on the back of the die, so that the die is prevented from deforming under the high-temperature environment, and the service life of the die is prolonged.

Description of the drawings:

FIG. 1 is a top view of the present invention;

FIG. 2 is a bottom view of the present invention;

in the figure: 1. a body; 2. a busbar groove; 3. a first positioning hole; 4. a second positioning hole; 5. a standby positioning hole; 6. a lug fixing hole; 7. reinforcing ribs; 8. a bevel; 9. and (4) air holes.

The specific implementation mode is as follows:

in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

Combine the attached drawing a used mould of utmost point ear cast joint, including body 1, be equipped with a plurality of busbar recesses 2 on body 1, busbar recess 2 size and position on body 1 will be according to the coefficient of thermal expansion of body 1 material and set for, make busbar recess 2 can reach the design standard under the cast joint environment, the middle part of body 1 is equipped with first locating hole 3, the both sides of body 1 are equipped with reserve locating hole 5 and banding second locating hole 4 respectively, the back of body 1 is equipped with a plurality of strengthening ribs 7 that intersect vertically and horizontally, all be equipped with bleeder vent 9 on the strengthening rib 7.

Because any object made of any material has the characteristics of expansion with heat and contraction with cold, the body 1 is no exception, for example, the design that the die body 1 adopts No. 45 steel, and the query shows that the material has a thermal expansion coefficient in the temperature range of 20-400 DEG CNumber (/ C)^。) Is 13.71 x 10^-6And the melting point of the lead liquid is 328 ℃, so the lead liquid in the welding-assistant machine is generally maintained at about 380 ℃, the size and the position on the body 1 of the bus bar groove 2 in a normal temperature state are calculated according to the design parameters of the bus bar groove 2 and the thermal expansion coefficient under the cast-weld condition, therefore, the tab can completely penetrate into the bus bar groove 2 during cast-weld, the phenomenon that the tab cannot be immersed into the bus bar groove 2 due to expansion deviation is avoided, the defective rate is increased, and the tab rosin joint is greatly reduced during cast-weld.

Because the cast-weld environment of the body 1 is frequently switched between high temperature and room temperature, deformation will occur over time, and once the body 1 deforms, the bus bar grooves 2 will shift, resulting in the cast-weld failure of the tabs, so in order to prolong the service life of the body 1, a plurality of criss-cross reinforcing ribs 7 are designed on the back of the body 1, but the reinforcing ribs 7 have a certain thickness, after the body 1 is immersed in lead liquid, gas in the area surrounded by the reinforcing ribs 7 cannot be discharged, a layer of gas film is formed on the back of the body 1, the gas film has a certain heat insulation effect, however, when the tabs are cast-welded, the tabs are inserted into the lead liquid in the bus bar grooves 2 on the body 1, the tabs are melted by the temperature of the lead liquid, but the lead liquid in the bus bar grooves 2 is less, the provided heat is not enough to melt the tabs, so that the body 1 needs to continuously supply heat for the lead liquid, finally, the tab melting and the busbar welding are completed, but the heat insulation effect of the air film prolongs the time of the temperature rise of the body 1, further prolongs the whole cast-weld time, and reduces the production efficiency, so that the air holes 9 are required to be formed in the reinforcing ribs 7, and after the body 1 is immersed in lead liquid, air is exhausted from the air holes 9.

The first positioning hole 3, the second positioning hole 4 and the standby positioning hole 5 are located on the transverse middle line of the body 1, the first positioning hole 3 is used as a positioning reference, after the body 1 is thermally expanded, the expansion amount of the middle part is the minimum, so that the first positioning hole 3 is used as the positioning reference and used for containing the pin of the turnover plate, the second positioning hole 4 is located on the side face of the die body 1, and due to the expansion of the body, the second positioning hole 4 is designed to be long-strip-shaped, and the pin on the turnover plate can be placed into the second positioning hole 4.

The vertical both sides of body 1 are equipped with the inclined plane 8 of symmetry, and 8 both sides on inclined plane all are equipped with a plurality of hangers fixed orificess 6, promote the back in body 1 follow lead liquid, and inclined plane 8 can accelerate lead liquid and flow down from body 1, holds the couple in hangers fixed orifices 6, and the couple is hung on the lifter of scaling powder, through the lift of lifter, controls the lift of body 1.

This design is according to the material of mould to and mould operational environment's actual temperature, when the design busbar recess, with the inflation volume considered, like this under the environment of locating, the position of busbar recess will be unanimous with the position that actual utmost point ear was located, the phenomenon that utmost point ear naked welding can not appear, simultaneously, designs many strengthening ribs at the mould back, can guarantee that the mould does not take place deformation, extension mould life under high temperature environment.

The details of the above are not described in detail since they are prior art.

Claims

1. The utility model provides a used mould of utmost point ear cast joint which characterized in that: including the body, be equipped with a plurality of busbar recesses on the body, the size and the position of busbar recess on the body will be set for according to the coefficient of thermal expansion of body material, make the busbar recess can reach the design standard under the cast joint environment, and the middle part of body is equipped with first locating hole, and the both sides of body are equipped with reserve locating hole and long banding second locating hole respectively, and the back of body is equipped with a plurality of strengthening ribs that move about freely and quickly alternately, all is equipped with the bleeder vent on the strengthening rib.

2. The die for cast welding of the tab as claimed in claim 1, wherein: the first positioning hole, the second positioning hole and the standby positioning hole are positioned on the transverse middle line of the body.

3. The die for cast-welding a tab as claimed in claim 1, wherein: the longitudinal two sides of the body are provided with symmetrical inclined planes, and the two sides of each inclined plane are provided with a plurality of hanging lug fixing holes.