CN219286531U - Pin, battery top cap and battery - Google Patents

Abstract

The utility model relates to a pin, a battery top cover and a battery, wherein the pin comprises a first connecting plate and a second connecting plate which are arranged at an included angle, a mounting hole is formed in the first connecting plate in a penetrating mode, the mounting hole is used for mounting a pole, the second connecting plate is provided with a welding area, the length of the welding area is larger than or equal to that of one side, provided with a pole lug, of a core package, the pole lug is connected in the welding area, and a fusing structure is arranged on the second connecting plate and is located between the welding area and the first connecting plate. Through setting up the structure of fusing on the second connecting plate, the slag that produces after the fusing falls in the space between tip and the shell of core package, compares in setting up the structure of fusing on first connecting plate, can avoid the slag to fall to the core package on causing the short-circuit burning. Meanwhile, the length of the welding area exceeds the length of one side of the core pack with the electrode lugs, so that full electrode lug welding is realized, the cutting procedure of the electrode lugs is avoided, and the installation process of the core pack is simplified.

Description

Pin, battery top cap and battery

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to a pin, a battery top cover comprising the pin and a battery comprising the battery top cover.

Background

Lithium ion batteries are widely used as energy sources for smart phones, electric tools, and new energy automobiles due to their high specific energy. Along with the increasing requirements of application terminals on the energy source endurance capability, the requirements of people on the energy density of lithium ion batteries are continuously increased, so that the lithium ion batteries are required to have higher space utilization rate and simpler and more reliable structure to improve the space occupation ratio of core packages in the batteries in the whole batteries. In a common battery structure, a pole post on a cover plate and a pole lug in a core pack are connected by adopting an L-shaped connecting piece, wherein the L-shaped connecting piece comprises two connecting plates which are vertically arranged, one connecting plate is parallel to the cover plate and is connected with the pole post, and the other connecting plate is positioned on the side surface of the core pack and is connected with the pole lug. The L-shaped connecting piece is used for connecting the pole and the pole lug, and the device has the characteristics of high space utilization rate and simple structure. The prior art has the following defects: 1) And the fusing structure is arranged on the connecting plate with the pole, so that the battery is protected by breaking the fusing structure when the core pack is abnormal. However, slag generated after the fusing structure is fused can fall down onto the core package, so that the core package is extremely easy to be short-circuited to cause combustion; 2) The length of the connecting plate connected with the tab is short, and when the tab is welded, the tab is required to be welded and installed after being cut, so that the cutting procedure is increased.

Disclosure of Invention

One objective of the present utility model is to provide a pin, which can prevent slag generated by overload fusing from falling into a core pack to cause short-circuit combustion, and simplify the installation process with the core pack.

Another object of the present utility model is to provide a battery top cover that is highly safe.

It is still another object of the present utility model to provide a battery that is highly safe.

To achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a pin, including first connecting plate and the second connecting plate that is the contained angle setting, the mounting hole has been run through on the first connecting plate, the mounting hole is used for installing the utmost point post, the second connecting plate is provided with the welded zone, the length of welded zone is greater than or equal to the length that the core package has one side of utmost point ear, the utmost point ear connect in the welded zone, be provided with fusing structure on the second connecting plate, fusing structure is located the welded zone with between the first connecting plate.

Further, the fusing structure is a long hole or a long groove, and the length direction of the long hole or the long groove extends along the width direction of the second connecting plate.

Further, the fusing structure is a notch arranged at the edge of the second connecting plate, and the notches are arranged at two ends of the second connecting plate in the width direction.

Further, the fusing structure is disposed adjacent to the first connection plate.

Further, the number of the welding areas is two, and the two welding areas are arranged at intervals along the width direction of the second connecting plate.

Further, the mounting hole is a step hole.

Further, a reinforcing structure is arranged on the first connecting plate, and the reinforcing structure is a protruding portion protruding from the first connecting plate.

The battery top cover further comprises a cover plate and a pole column, wherein the first connecting plate is connected with the cover plate, and the pole column penetrates through the first connecting plate and the cover plate.

Further, the lead wire packaging structure further comprises an insulating piece, wherein the insulating piece is arranged on one side surface of the lead wire, which is close to the core package.

The battery comprises a battery top cover, a core pack and a shell, wherein the battery top cover is arranged at one end of the shell, a containing cavity for containing the core pack is formed between the battery top cover and the shell, the core pack comprises a tab, and the tab is welded in the welding area.

Compared with the prior art, the utility model has the beneficial effects that:

according to the pin, the battery top cover and the battery, the fusing structure is arranged on the second connecting plate, and slag generated after fusing falls into a gap between the end part of the core pack and the shell. Meanwhile, the length of the welding area exceeds the length of one side of the core pack with the electrode lugs, so that full electrode lug welding is realized, the cutting procedure of the electrode lugs is avoided, and the installation process of the core pack is simplified.

Drawings

Fig. 1 is a top view of a battery according to an embodiment of the present utility model.

Fig. 2 is an exploded view of a battery according to an embodiment of the present utility model.

Fig. 3 is a schematic diagram of a pin according to an embodiment of the utility model.

Fig. 4 is a schematic diagram of a pin according to another embodiment of the utility model.

Fig. 5 is a schematic view of a first connection board according to an embodiment of the utility model.

Fig. 6 is a partial cross-sectional view of a first connection plate according to an embodiment of the present utility model.

Fig. 7 is a schematic diagram illustrating the mounting of the lead and the tab according to an embodiment of the present utility model.

In the figure:

1. a cover plate; 2. pins; 21. a first connection plate; 22. a second connecting plate; 23. a welding area; 24. a long hole; 25. a notch; 26. a mounting hole; 27. a boss; 3. a pole; 4. an insulating member; 5. a core pack; 51. a tab; 6. a housing; 7. and a protective film.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings.

As shown in fig. 1 to 3, the pin 2 provided by the present utility model includes a first connection board 21 and a second connection board 22 that are disposed perpendicular to each other. The first connection plate 21 is used for being connected with the cover plate 1 of the battery and the pole 3 arranged on the cover plate 1, and the second connection plate 22 is used for being connected with the pole lug 51 on the core pack 5, so that the pole 3 and the core pack 5 are conducted through the pin 2. The first connecting plate 21 is provided with a mounting hole 26 in a penetrating manner, and the mounting hole 26 is used for mounting the pole 3. The pole 3 is used for being electrically connected with external electric equipment, and the pole 3 wears to locate on the apron 1, and the one end of pole 3 extends to the outside of battery and is used for being connected with external electric equipment, and the other end of pole 3 extends to the inside of battery and peg graft in the mounting hole 26 of first connecting plate 21, and pass through welded fastening between pole 3 and the first connecting plate 21. The length direction of the second connection plate 22 extends in the height direction (Z direction shown) of the battery. The second connecting plate 22 is provided with a welding area 23, the second connecting plate 22 is positioned at the end part of the core pack 5 in the length direction (X direction in the drawing), and the tab 51 of the core pack 5 is fixedly connected with the welding area 23 of the second connecting plate 22 by means of laser welding. The length of the land 23 is greater than or equal to the height of the core pack 5, and it is also understood that the length of the land 23 is greater than or equal to the length of the side of the core pack 5 having the tab 51. The structure makes the pole ear 51 not need to be cut after the core pack 5 is manufactured, and the pole ear 51 which is not cut is also called a full pole ear, namely the length of the pole ear 51 is the same as the height of the core pack 5. The second connecting plate 22 is provided with a fusing structure, and the fusing structure is located between the welding area 23 and the first connecting plate 21. The effect of the fusing structure is that when the current of the core pack 5 is overloaded, the fusing structure and the surrounding area of the fusing structure are fused at high temperature, so that the overload protection of the whole battery is achieved.

It will be appreciated that, since the fusing structure is disposed on the second connecting plate 22, slag generated after fusing falls into the gap between the end of the core pack 5 and the outer shell 6, and compared with the case where the fusing structure is disposed on the first connecting plate 21, it is possible to avoid the slag falling onto the core pack 5 to cause short-circuit combustion. Meanwhile, the length of the welding area 23 exceeds the length of one side of the core pack 5 with the tab 51, so that full tab welding is realized, and the cutting procedure of the tab 51 is avoided.

Alternatively, the fusing structure is located adjacent to the first connection plate 21 so that there is sufficient space for providing the welding area 23 for the end of the second connection plate 22 facing away from the first connection plate 21. The fusing structure is a slot 24 or an elongated slot. The long hole 24 or the long groove extends in the width direction of the second connecting plate 22 in the length direction. The long holes 24 and the long grooves serve to weaken the area between the welding area 23 and the first connection plate 21, and when the core pack 5 is overloaded, the high temperature generated by the overload current can melt the area near the fusing structure, so that the tab 51 is electrically disconnected from the pole 3. Specifically, when the fusing structure is the long hole 24, fusing may occur in an area between both ends of the long hole 24 in the length direction and the edge of the second connection plate 22; when the fusing structure is a long groove, the length direction of the long groove extends along the width direction of the second connecting plate 22 and penetrates through two ends of the width direction of the second connecting plate 22, and the bottom area of the long groove can be fused.

Alternatively, referring to fig. 4, the fusing structure is a notch 25 disposed at an edge of the second connecting plate 22, and the two ends of the second connecting plate 22 are provided with notches 25 along a width direction of the second connecting plate 22, and the two notches 25 are symmetrically disposed. When overload occurs, the area between the two notches 25 may blow.

It will be appreciated that the fuse structure is provided to provide a structurally weakened region on the second connection plate 22 so that the high temperature generated by the overload current can be fused in the corresponding weakened region to disconnect the tab 51 from the pole 3. Accordingly, the fusing structure may be provided in other shapes than the long hole 24, the long groove or the notch 25. For example, a plurality of through holes may be provided at intervals in the width direction of the second connection plate 22, and the plurality of through holes may be arranged in a straight line. The plurality of through holes are provided so that a weakened area where high-temperature fusing can occur is provided between the land 23 and the first connection plate 21.

Alternatively, referring to fig. 2 and 3, there are two welding areas 23, and the two welding areas 23 are spaced apart in the width direction of the second connection plate 22. Correspondingly, one end of the core pack 5 is provided with two lugs 51, and the two lugs 51 are welded in the two welding areas 23 respectively. It will be appreciated that when the tab 51 is mounted, the second connection plate 22 is directly opposite to the end face of the core pack 5, and the tab 51 bypasses the edge of the second connection plate 22 and is bent and then is stacked in the welding area 23. Therefore, the provision of two lands 23 is advantageous in reducing the width of the tab 51, saving materials, and facilitating installation.

Alternatively, referring to FIG. 3, the mounting hole 26 is a stepped hole. The mounting holes 26 are arranged as step holes, and after the pins 2 and the pole 3 are mounted, the step holes can play a limiting role on the pole 3. In this embodiment, the depth of the large hole of the stepped hole is greater than or equal to 0.2mm.

Optionally, referring to fig. 5 and 6, a reinforcing structure is provided on the first connecting plate 21, and the reinforcing structure is used for reinforcing the structural strength and rigidity of the first connecting plate 21, so as to avoid sagging and deformation under the pulling action of the core package 5 after the pins 2 are installed. The reinforcing structure is a protruding portion 27 protruding on the first connecting plate 21, and the height of the protruding portion 27 relative to the first connecting plate 21 is 0.1mm-0.8mm. In this embodiment, the number of the protruding portions 27 is plural, and the plurality of protruding portions 27 are disposed on the first connecting plate 21 at intervals. The boss 27 is integrally press-molded with the first connecting plate 21.

Optionally, the first connecting plate 21 and the second connecting plate 22 of the pin 2 are integrally bent and formed, and the thickness of the first connecting plate 21 and the second connecting plate 22 is greater than 0.8mm.

The remarkable effects of this embodiment are: by arranging the fusing structure on the second connecting plate 22, slag generated after fusing falls into a gap between the end of the core pack 5 and the outer shell 6, and compared with the arrangement of the fusing structure on the first connecting plate 21, the short-circuit combustion caused by the slag falling onto the core pack 5 can be avoided. Meanwhile, the length of the welding area 23 exceeds the length of one side of the core pack 5 with the tab 51, so that full tab welding is realized, the cutting procedure of the tab 51 is avoided, and the installation process of the core pack 5 is simplified.

Referring to fig. 1, 2 and 7, there is also provided a battery top cover including a cap plate 1, a lead 2, a post 3 and an insulator 4. The cover plate 1 comprises an upper top cover made of a metal plate and a lower plastic plate made of an insulating plate, wherein the lower plastic plate is arranged on one side surface of the upper top cover facing the core bag 5, and the lower plastic plate plays a role in insulating isolation. The number of the polar posts 3 is two, one of which is a positive polar post and the other is a negative polar post. Correspondingly, the number of the pins 2 is two, and the two pins 2 are respectively used for being connected with the two polar posts 3. The two pins 2 are distributed at two ends of the cover plate 1 in the length direction, and the two pins 2 are symmetrically arranged. The pole 3 is arranged on the cover plate 1 in a penetrating way, one end of the pole 3 extends to the outside of the battery, and the other end extends to the inside of the battery and is connected with the first connecting plate 21 of the pin 2. The second connection plates 22 of the pins 2 are distributed at both ends in the longitudinal direction (X direction in the drawing) of the battery, and the core pack 5 is mounted between the second connection plates 22 corresponding to the two pins 2. The tab 51 on the core pack 5 bypasses the edge portion of the second connection plate 22 and is overlapped on one side surface of the second connection plate 22, which is away from the core pack 5, and the tab 51 and the second connection plate are welded and fixed. The insulator 4 is used for insulating and protecting the pins 2, and the insulator 4 is adhered and arranged on the side surface, close to the core bag 5, of the pins 2.

In the present embodiment, the second connection plate 22 of the pin 2 is provided at the side of the core pack 5, and the fusing structure is provided on the second connection plate 22. When the core package 5 is overloaded with current, the second connecting plate 22 is fused, and the fused slag falls into the gap between the core package 5 and the outer shell 6, so that the slag is prevented from falling onto the core package 5 to cause short-circuit combustion, and the safety is high.

Referring to fig. 1 and 2, there is also provided a battery including a battery top cover, a core pack 5, a case 6, and a protective film 7. The outer shell 6 is an aluminum shell with a cavity structure, and the battery top cover is welded at the opening end of the outer shell 6, so that a closed accommodating cavity is formed between the outer shell 6 and the battery top cover. The core pack 5 has tabs 51 at both ends in the longitudinal direction, one of which is a positive tab and the other of which is a negative tab. The tab 51 is welded in the welding area 23 of the corresponding second connecting plate 22 to realize the conduction between the core package 5 and the pole 3. The core package 5 is connected with the pins 2 and then is arranged in the accommodating cavity, and electrolyte is filled in the accommodating cavity. The protection film 7 covers the outside of the core pack 5 for protecting the core pack 5. When the battery is overloaded with current, the short-circuit combustion caused by the fact that slag after the melting off of the pin 2 falls on the core pack 5 can be avoided, and the battery has the characteristic of being high in safety.

The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.

Claims (10)

1. The utility model provides a pin, its characterized in that is including first connecting plate and the second connecting plate that is the contained angle setting, the mounting hole has been run through on the first connecting plate, the mounting hole is used for installing the utmost point post, the second connecting plate is provided with the welded zone, the length of welded zone is greater than or equal to the length of core package one side that has the utmost point ear, the utmost point ear connect in the welded zone, be provided with the fusing structure on the second connecting plate, the fusing structure is located the welded zone with between the first connecting plate.

2. The pin according to claim 1, wherein the fusing structure is a long hole or a long groove, and a length direction of the long hole or the long groove extends in a width direction of the second connection plate.

3. The pin of claim 1, wherein the fusing structure is a notch provided at an edge of the second connection plate, and both ends of the second connection plate in a width direction are provided with the notch.

4. The pin of claim 1, wherein the fusing structure is disposed adjacent to the first connection plate.

5. The pin of claim 1, wherein the number of the bonding areas is two, and the two bonding areas are spaced apart along the width direction of the second connection board.

6. A pin according to any one of claims 1 to 5, wherein the mounting hole is a stepped hole.

7. A pin according to any one of claims 1 to 5, wherein the first connection plate is provided with a reinforcing structure, and the reinforcing structure is a protrusion protruding from the first connection plate.

8. A battery top cover, characterized by comprising the pin of any one of claims 1 to 7, further comprising a cover plate and a pole, wherein a first connecting plate is connected with the cover plate, and the pole penetrates through the first connecting plate and the cover plate.

9. The battery top cover of claim 8, further comprising an insulator disposed on a side of the pin proximate to the core pack.

10. A battery, characterized by comprising the battery top cover according to any one of claims 8 or 9, further comprising a core pack and a housing, wherein the battery top cover is disposed at one end of the housing, and a containing cavity for containing the core pack is formed between the battery top cover and the housing, and the core pack comprises a tab welded in the welding area.

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