CN220796909U - Novel battery cover plate with aluminum ring structure - Google Patents

Abstract

The utility model belongs to the technical field of lithium batteries, and provides a novel battery cover plate with an aluminum ring structure, which comprises an aluminum plate and an aluminum ring, wherein a first through hole is formed in the aluminum plate in a penetrating manner up and down, an annular groove is formed in the upper end face of the aluminum plate, the annular groove is coaxially communicated with the first through hole, the aluminum ring is clamped in the annular groove, and pins are fixedly arranged on the outer side wall of the aluminum ring; the pin bottom with the aluminium ring bottom flushes, the pin top with aluminum plate up end flushes, aluminum plate up end seted up with the first groove of stepping down of pin looks adaptation, the pin embedding the first inslot of stepping down. This battery apron is in the in-process of moulding plastics, and the front mould benevolence compound die gets down, can push down the pin on the aluminium ring lateral wall, cooperates the first effect that gives up the groove and play to fix the pin for the aluminium ring still can keep stably under the impact of bearing the pressure of moulding plastics, prevents that the aluminium ring from appearing running the position phenomenon, solves the quality bad problems such as explosion point breakdown that follow-up aluminium ring and aluminium plate laser welding produced.

Description

Novel battery cover plate with aluminum ring structure

Technical Field

The utility model belongs to the technical field of lithium batteries, and particularly relates to a novel battery cover plate with an aluminum ring structure.

Background

Along with the development and market popularization of new energy batteries, convenience is provided for our lives. However, there are still some problems in the manufacturing process, and we need to continuously perfect and optimize the structure of the battery cover plate, reduce the risk hidden trouble existing subsequently, improve the production quality, save the raw materials, and thus manufacture better products. For example, the aluminum ring is a key component of the cover plate, and under the condition that no component is used for fixing the position of the aluminum ring in the pole injection molding process, the aluminum ring can run away under the influence of the injection molding pressure in the mold cavity, so that adverse phenomena such as explosion point breakdown and the like can occur in the subsequent laser welding process with the aluminum plate.

Disclosure of utility model

Aiming at the defects in the prior art, the utility model provides a novel battery cover plate with an aluminum ring structure, which effectively solves the problem of position running of an aluminum ring in the injection molding process, and the quality of the follow-up laser welding with an aluminum plate is more stable.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the novel battery cover plate with the aluminum ring structure comprises an aluminum plate and an aluminum ring, wherein a first through hole is formed in the aluminum plate in a penetrating mode up and down, an annular groove is formed in the upper end face of the aluminum plate, the annular groove is communicated with the first through hole coaxially, the aluminum ring is clamped in the annular groove, and pins are fixedly arranged on the outer side wall of the aluminum ring;

the pin bottom with the aluminium ring bottom flushes, the pin top with aluminum plate up end flushes, aluminum plate up end seted up with the first groove of stepping down of pin looks adaptation, the pin embedding the first inslot of stepping down.

Preferably, the pins are fixedly arranged on the side walls around the aluminum ring.

Preferably, the battery cover plate further comprises a lower plastic, the aluminum plate is lapped on the lower plastic, a second through hole is formed in the lower plastic in a penetrating mode, the second through hole is coaxial with the first through hole, an insulation step is fixedly arranged on the upper end face of the lower plastic, the insulation step is arranged along the second through hole, a third abdication groove matched with the insulation step is formed in the lower end face of the aluminum plate, and the insulation step is embedded into the third abdication groove.

Preferably, the insulating step inner side wall is flush with the first through hole inner side wall.

Preferably, the battery cover plate further comprises a sealing ring, the sealing ring comprises a vertical section and a horizontal section, the vertical section of the sealing ring is coaxially sleeved in the first through hole, the horizontal section of the sealing ring is lapped on the annular groove, a limiting step is fixedly arranged on the inner bottom surface of the annular groove, a second yielding groove matched with the limiting step is formed in the bottom surface of the horizontal section of the sealing ring, and the limiting step is embedded in the second yielding groove.

Preferably, the limiting step is an annular step.

Preferably, the limit step is arranged along the annular groove inner ring.

Preferably, the battery cover plate further comprises a sealing rubber plug, the aluminum plate vertically penetrates through a liquid injection hole matched with the sealing rubber plug, the sealing rubber plug is in interference fit with the liquid injection hole, the top end of the sealing rubber plug is fixedly connected with a tail step, the outer diameter of the tail step is larger than the inner diameter of the liquid injection hole, a fourth relief groove matched with the tail step is formed in the aluminum plate, and the tail step is embedded into the fourth relief groove.

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

1. According to the novel battery cover plate with the aluminum ring structure, in the injection molding process, the front mold core is clamped down, pins on the side wall of the aluminum ring can be pressed, and the pins can be fixed by matching with the first abdication groove, so that the aluminum ring can still be kept stable under the impact of injection molding pressure, the phenomenon of position shifting of the aluminum ring is prevented, and the quality defect such as explosion point breakdown generated in the laser welding of the aluminum ring and the aluminum plate is solved.

2. According to the novel battery cover plate with the aluminum ring structure, the insulation step is additionally arranged on the lower plastic body, so that the effect of blocking current can be achieved, and the insulation effect of the product is better.

3. According to the novel battery cover plate with the aluminum ring structure, the limiting steps are additionally arranged on the aluminum plate, so that the sealing ring can be better fixed, and the position consistency of the novel battery cover plate is better.

4. According to the novel battery cover plate with the aluminum ring structure, the tail step is additionally arranged at the tail part of the sealing rubber plug, so that the battery cover plate is prevented from falling into the battery core due to the influence of external force factors.

Drawings

FIG. 1 is a schematic perspective view of an aluminum ring in the prior art;

FIG. 2 is a schematic perspective view of a prior art sealing rubber plug;

fig. 3 is an exploded view of a battery cover plate with a novel aluminum ring structure according to an embodiment of the present utility model;

fig. 4 is a schematic top view of an aluminum ring of a battery cover plate with a novel aluminum ring structure according to an embodiment of the present utility model;

fig. 5 is a schematic perspective view of a sealing rubber plug of a battery cover plate with a novel aluminum ring structure according to an embodiment of the present utility model;

Fig. 6 is a schematic cross-sectional structure of an aluminum ring and related parts of a battery cover plate with a novel aluminum ring structure according to an embodiment of the present utility model;

Fig. 7 is a schematic cross-sectional structure diagram of a sealing rubber plug of a battery cover plate with a novel aluminum ring structure and related parts thereof according to an embodiment of the utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. Plastic cement is arranged on the anode; 2. a positive electrode post; 3. an aluminum ring; 4. a seal ring; 5. an aluminum plate; 6. lower plastic; 7. plastic is arranged on the negative electrode; 8. a negative electrode column; 11. plane aluminum nails; 12. sealing the rubber plug; 30. pins; 50. a limit step; 60. an insulating step; 121. a tail step.

Detailed Description

The present utility model will be described in further detail with reference to specific examples so as to more clearly understand the present utility model by those skilled in the art.

It should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, unless otherwise specifically indicated and defined. The specific meaning of such terms in this patent will be understood by those of ordinary skill in the art as the case may be.

Example 1

As shown in fig. 1, the periphery of the aluminum ring in the prior art is of a smooth structure, when in injection molding, the aluminum ring is directly clamped on the aluminum plate, no external force is required to fix, and the aluminum ring is possibly in position due to the influence of injection molding pressure in the mold cavity.

In order to avoid the problems, as shown in fig. 3, 4 and 6, the embodiment provides a novel battery cover plate with an aluminum ring structure, which comprises an aluminum plate 5 and an aluminum ring 3, wherein a first through hole is vertically penetrated through the aluminum plate 5, an annular groove is formed in the upper end surface of the aluminum plate 5, the annular groove is coaxially communicated with the first through hole, the aluminum ring 3 is clamped in the annular groove, and pins 30 are fixedly arranged on the outer side wall of the aluminum ring 3;

The bottom of the pin 30 is flush with the bottom of the aluminum ring 3, the top of the pin 30 is flush with the upper end face of the aluminum plate 5, a first abdication groove matched with the pin 30 is formed in the upper end face of the aluminum plate 5, and the pin 30 is embedded into the first abdication groove.

Before injection molding, the positive pole 2 is placed in the rear mold cavity, and then the aluminum ring 3 is placed in the rear mold cavity. Because the outer side wall of the aluminum ring 3 is fixedly provided with the pins 30, the pins 30 are embedded into the first abdication groove, so that when injection molding is performed, the pins 30 can be fixed by pressing the front mold core of the mold assembly, and then the aluminum ring 3 is fixed, and the running position is prevented from being influenced by pressure in the injection molding process. After injection molding, the positive pole 2, the aluminum ring 3 and the plastic 1 (the negative pole 8, the aluminum ring 3 and the plastic 7 on the negative pole) can form a new modularized structure, and then the new modularized structure is assembled with the sealing ring and then put into the first through hole of the aluminum plate 5 for laser welding, so that the problem that the bottom of the aluminum ring 3 is completely injected with a plurality of adhesives is effectively avoided, and the phenomena of breakdown and desoldering and infirm welding of the explosion point formed by the subsequent welding with the aluminum plate 5 are avoided.

To sum up, in the battery cover plate with the novel aluminum ring structure provided in this embodiment, during the injection molding process, the front mold core is clamped down, so that the pin 30 of the aluminum ring 3 can be pressed, the first abdication groove is matched to fix the pin 30, so that the aluminum ring 3 can still keep stable under the impact of the injection molding pressure, the aluminum ring 3 is prevented from running, and the quality defect such as explosion point breakdown generated by laser welding of the aluminum ring 3 and the aluminum plate 5 is solved.

Wherein, the pins 30 are fixedly arranged on the side walls around the aluminum ring 3. In the injection molding process, the front mold core is clamped, the aluminum ring 3 can be fixed from four directions, and the stability of the aluminum ring 3 is effectively ensured.

Example 2

Under the current situation, a certain gap exists between the lower plastic and the aluminum plate, but the insulation effect of the product is affected when the fit gap is too small due to size limitation, and the safety performance of the product is reduced. For example, as shown in fig. 6, there is an assembly gap after the lower plastic is assembled with the aluminum plate 5, and the cover plate will form an electric spark during the current passing process, which may have a certain risk of short circuit.

In order to further improve the insulating properties of the cover plate, on the basis of embodiment 1, the battery cover plate further comprises a lower plastic 6, the aluminum plate 5 is lapped on the lower plastic 6, a second through hole is vertically penetrated and arranged on the lower plastic 6, the second through hole is coaxial with the first through hole, an insulating step 60 is fixedly arranged on the upper end face of the lower plastic 6, the insulating step 60 is circumferentially arranged along the second through hole, a third abdicating groove matched with the insulating step 60 is formed in the lower end face of the aluminum plate 5, and the insulating step 60 is embedded into the third abdicating groove. Wherein the insulating step 60 inner sidewall is flush with the first via inner sidewall.

After the lower plastic 6 is assembled with the aluminum plate 5, the insulation step 60 is embedded into the third yielding groove, and the insulation step 60 can effectively block current, so that the insulation effect of a product is improved.

Example 3

In the present case, the existing sealing rings are pressed by pressure in the injection molding process, and the position consistency of the sealing rings can be affected, so that the assembly of the subsequent working procedures is problematic. For example, as shown in fig. 6, after the die is closed, the positive electrode post 2 is pressed by the downward force of the die core to squeeze the sealing ring 4, so that the bottom of the sealing ring 4 is uneven or protrudes too much, which affects the assembly of the subsequent process, and risks raising the lower plastic 6, and even makes the connecting piece unable to be welded with the bottom of the positive electrode post 2.

In order to solve the above problem, on the basis of embodiment 2, the battery cover plate further comprises a sealing ring 4, the sealing ring 4 comprises a vertical section and a horizontal section, the vertical section of the sealing ring 4 is coaxially sleeved in the first through hole, the horizontal section of the sealing ring 4 is lapped on the annular groove, a limiting step 50 is fixedly arranged on the inner bottom surface of the annular groove, a second yielding groove matched with the limiting step 50 is formed in the bottom surface of the horizontal section of the sealing ring 4, and the limiting step 50 is embedded in the second yielding groove.

The sealing ring 4 is sleeved at the bottom of the positive pole 2, then the sealing ring is placed in the first through hole of the aluminum plate 5, at the moment, the limiting step 50 can be embedded into the second yielding groove, the limiting step 50 plays a role in positioning the sealing ring 4, the problem that the tail of the sealing ring 4 protrudes due to extrusion of the positive pole 2 can be effectively avoided, and the consistency of the positions of the sealing ring 4 is better.

Wherein, the limit step 50 is an annular step. The limit step 50 is disposed along the annular groove inner ring. Therefore, the positioning effect of the limiting step 50 on the sealing ring 4 is more uniform and comprehensive, and the stability of the sealing ring 4 is further improved.

Example 4

In the present case, as shown in fig. 2, the shape of the existing sealing rubber plug may be made into a circular straight body, and the sealing rubber plug is in interference fit with the liquid injection hole of the aluminum plate 5 by its own size, so as to play a role in sealing. However, when the battery is completely poured with electrolyte, a small amount of liquid remains in the orifice of the electrolyte injection hole, and the electrolyte needs to be wiped and cleaned, so that the sealing rubber plug is at risk of falling into the battery cell during cleaning.

In order to solve the above problem, on the basis of embodiment 1, as shown in fig. 5 and 7, the battery cover plate further comprises a sealing rubber plug 12, the aluminum plate 5 is vertically penetrated with a liquid injection hole adapted to the sealing rubber plug 12, the sealing rubber plug 12 is in interference fit with the liquid injection hole, the top end of the sealing rubber plug 12 is fixedly connected with a tail step 121, the outer diameter of the tail step 121 is larger than the inner diameter of the liquid injection hole, a fourth relief groove adapted to the tail step 121 is formed in the aluminum plate 5, and the tail step 121 is embedded into the fourth relief groove.

After the electrolyte is poured into the battery, the sealing rubber plug 12 is plugged, then a worker wipes the electrolyte remained at the position of the electrolyte injection hole, and finally the electrolyte is covered by the plane aluminum nails 11. The tail step 121 can prevent the sealing rubber plug 12 from falling to the inside of the battery cell due to the influence of external force factors.

Mechanisms, components, and members not described in the specific structure of the present utility model are all existing structures already existing in the prior art. Can be purchased directly from the market.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and for simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, as well as a specific orientation configuration and operation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

The foregoing is merely a preferred embodiment of the present utility model, and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (8)

1. The novel battery cover plate with the aluminum ring structure is characterized by comprising an aluminum plate (5) and an aluminum ring (3), wherein a first through hole is formed in the aluminum plate (5) in a penetrating mode up and down, an annular groove is formed in the upper end face of the aluminum plate (5), the annular groove is coaxially communicated with the first through hole, the aluminum ring (3) is clamped in the annular groove, and pins (30) are fixedly arranged on the outer side wall of the aluminum ring (3);

The bottom of the pin (30) is flush with the bottom of the aluminum ring (3), the top of the pin (30) is flush with the upper end face of the aluminum plate (5), a first abdication groove matched with the pin (30) is formed in the upper end face of the aluminum plate (5), and the pin (30) is embedded into the first abdication groove.

2. The novel aluminum ring structured battery cover plate according to claim 1, wherein the pins (30) are fixedly arranged on the side walls around the aluminum ring (3).

3. The battery cover plate with the novel aluminum ring structure according to claim 1, further comprising a lower plastic (6), wherein the aluminum plate (5) is lapped on the lower plastic (6), a second through hole is formed in the lower plastic (6) in a penetrating mode up and down, the second through hole is coaxial with the first through hole, an insulation step (60) is fixedly arranged on the upper end face of the lower plastic (6), the insulation step (60) is arranged along the second through hole, a third yielding groove matched with the insulation step (60) is formed in the lower end face of the aluminum plate (5), and the insulation step (60) is embedded into the third yielding groove.

4. A novel aluminum ring structured battery cover plate as claimed in claim 3 wherein said insulating step (60) inner side wall is flush with said first through hole inner side wall.

5. The novel aluminum ring structured battery cover plate according to claim 1, wherein the battery cover plate further comprises a sealing ring (4), the sealing ring (4) comprises a vertical section and a horizontal section, the vertical section of the sealing ring (4) is coaxially sleeved in the first through hole, the horizontal section of the sealing ring (4) is lapped on the annular groove, a limiting step (50) is fixedly arranged on the inner bottom surface of the annular groove, a second yielding groove matched with the limiting step (50) is formed in the bottom surface of the horizontal section of the sealing ring (4), and the limiting step (50) is embedded in the second yielding groove.

6. The novel aluminum ring structured battery cover plate as claimed in claim 5, wherein said limiting step (50) is an annular step.

7. The novel aluminum ring structured battery cover plate of claim 5, wherein said limiting step (50) is disposed along said annular groove inner ring.

8. The battery cover plate with the novel aluminum ring structure according to claim 1, further comprising a sealing rubber plug (12), wherein the aluminum plate (5) is vertically penetrated with a liquid injection hole, the sealing rubber plug (12) is in interference fit with the liquid injection hole, a tail step (121) is fixedly connected to the top end of the sealing rubber plug (12), the outer diameter of the tail step (121) is larger than the inner diameter of the liquid injection hole, a fourth relief groove matched with the tail step (121) is formed in the aluminum plate (5), and the tail step (121) is embedded into the fourth relief groove.