CN214753921U

CN214753921U - Lithium battery with reliable packaging structure

Info

Publication number: CN214753921U
Application number: CN202121261563.8U
Authority: CN
Inventors: 陈志川; 刘来兵; 崔万东
Original assignee: Shenzhen Yingtelai Industrial Co ltd
Current assignee: Shenzhen Yingtelai Industrial Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-11-16
Anticipated expiration: 2031-06-07

Abstract

The utility model provides a lithium cell with reliable packaging structure, it includes casing, upper cover, electric core, separator and sealing. Wherein casing one end is the opening down, and the upper cover encapsulation is connected at the opening part, and wraps up in the periphery of casing down, and the upper cover is not contacted with casing each other down, and electric core setting is inside casing down, and the positive negative pole of electric core is connected with upper cover and lower casing respectively, and the separator setting is at open-ended border for casing and upper cover under the isolation, and the sealing is filled between casing and upper cover down through the mode of moulding plastics to the connection of casing and upper cover under the fixed. The utility model discloses a lithium cell with reliable packaging structure is through the mode of moulding plastics the formation sealing between casing and upper cover down, will form the sealing connection of fastening casing and upper cover down, and anti deformability is stronger, and the structure is reliable.

Description

Lithium battery with reliable packaging structure

Technical Field

The utility model relates to a lithium cell field, in particular to lithium cell with reliable packaging structure.

Background

Lithium batteries are one of the energy devices commonly used in modern society. Common cylindrical lithium batteries are divided into different systems of lithium iron phosphate, lithium cobaltate, lithium manganate, cobalt manganese mixture and ternary materials, and shells are divided into two types, namely steel shells and polymers. At present, the cylinder mainly takes a steel shell cylindrical lithium iron phosphate battery as a main part, and the battery has the characteristics of high capacity, high output voltage, good charge-discharge cycle performance, stable output voltage, capability of heavy current discharge, stable electrochemical performance, safe use, wide working temperature range and environmental friendliness. The energy-saving lamp is widely applied to solar lamps, lawn lamps, backup energy sources, electric tools and toy models.

In the prior art, the upper cover and the lower shell of the lithium battery are generally formed by punching the inner metal shell and the outer metal shell to deform the inner metal shell and the outer metal shell to form clamping connection or fixedly connected by adopting a welding mode, so that the purpose of packaging is achieved. However, the packaging modes are relatively rigid and easy to deform, so that when the lithium battery is collided, falls and the like, the packaging structure is easily damaged, and the packaging is unreliable.

Therefore, it is desirable to provide a lithium battery with a reliable package structure to solve the above-mentioned technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a lithium cell with reliable packaging structure, it is through the mode of moulding plastics the formation sealing between casing and upper cover down, will form the sealing connection of fastening with the upper cover down to solve the unreliable problem of lithium cell packaging structure among the prior art.

In order to solve the technical problem, the utility model adopts the technical scheme that: a lithium battery having a reliable package structure, comprising:

one end of the lower shell is provided with an opening;

the upper cover is connected to the opening in a packaging mode and wrapped on the periphery of the lower shell, and the upper cover and the lower shell are not in contact with each other;

the battery cell is arranged in the lower shell, and the positive electrode and the negative electrode of the battery cell are respectively connected with the upper cover and the lower shell;

the isolating piece is arranged at the edge of the opening and used for isolating the lower shell from the upper cover; and

and the sealing part is filled between the lower shell and the upper cover in an injection molding mode so as to fix the connection of the lower shell and the upper cover.

The utility model discloses in, the separator includes the spread groove, the separator passes through spread groove interference parcel is in on the open-ended border.

One end of the lower shell, which is close to the opening, is provided with a positioning hole, and the inner wall of the connecting groove is provided with a positioning column connected with the positioning hole.

The utility model discloses in, the casing is close to down the periphery side of open-ended one end is provided with the concave rank of indent, the sealing is filled in the concave rank.

Furthermore, a first convex part is arranged on the side wall of the concave step.

Further, the first convex part is formed by punching from the inner side wall of the lower shell, or the first convex part is welded and connected on the outer side wall of the lower shell.

The utility model discloses in, the upper cover is including apron portion and cover section of thick bamboo, the apron portion seals the opening, cover section of thick bamboo parcel is in all sides of casing down be provided with the through-hole on the cover section of thick bamboo, the through-hole intussuseption is filled with the sealing.

Further, a second convex part is arranged on the inner wall of the cover cylinder part, and the second convex part and the first convex part are arranged in a staggered mode.

Further, the second projection is formed when the through hole is punched from the outside of the cap cylinder portion.

The present invention is directed to a method of manufacturing a semiconductor device, wherein the spacer is formed of a plurality of spacers.

The utility model discloses compare in prior art, its beneficial effect is: the utility model discloses a lithium cell with reliable packaging structure is through the mode of moulding plastics the formation sealing between casing and upper cover down, will form the sealing connection of fastening casing and upper cover down, and anti deformability is stronger, and the structure is reliable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding drawings of some embodiments of the present invention.

Fig. 1 is a schematic cross-sectional view of a lithium battery with a reliable package structure according to a preferred embodiment of the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1.

Fig. 3 is another embodiment of the structure of fig. 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the prior art, the upper cover and the lower shell of the lithium battery are generally formed by punching the inner metal shell and the outer metal shell to deform the inner metal shell and the outer metal shell to form clamping connection or fixedly connected in a welding mode, so that the purpose of packaging is achieved. However, the packaging modes are relatively rigid and easy to deform, so that when the lithium battery is collided, falls and the like, the packaging structure is easily damaged, and the packaging is unreliable.

The present invention provides a preferred embodiment of a lithium battery with a reliable package structure, which can solve the above technical problems.

Referring to fig. 1, fig. 1 is a schematic cross-sectional view illustrating a lithium battery with a reliable package structure according to a preferred embodiment of the present invention.

In the drawings, elements having similar structures are denoted by the same reference numerals.

The utility model provides a preferred embodiment of lithium cell with reliable packaging structure does: a lithium battery having a reliable packaging structure includes a lower case 11, an upper cover 12, a cell 13, a separator 15, and a sealing portion 14.

Wherein, one end of the lower shell 11 is an opening, and as shown in fig. 1, the top end of the lower shell 11 is an opening.

The upper cover 12 is connected at the opening in a sealing manner and wraps the periphery of the lower shell 11, and the upper cover 12 is not in contact with the lower shell 11.

The battery cell 13 is disposed inside the lower casing 11, and the positive electrode and the negative electrode of the battery cell 13 are respectively connected to the upper cover 12 and the lower casing 11, and the lithium battery may further include components such as a protection circuit board, a safety valve, and a PTC element (silicon thermistor) in the prior art.

A spacer 15 is provided at the edge of the opening for separating the lower case 11 and the upper cover 12.

The sealing part 14 is filled between the lower shell 11 and the upper cover 12 in an injection molding mode to fix the connection between the lower shell 11 and the upper cover 12, so that the lower shell 11 and the upper cover 12 form a tight sealing connection, the sealing part 14 is preferably made of plastic with strong deformation capacity, the deformation resistance is stronger, and the structure is reliable.

Referring to fig. 2, the isolation member 15 in this embodiment includes a connection groove, and the isolation member 15 is wrapped on the edge of the opening by interference fit through the connection groove.

Further, the lower casing 11 is provided with the locating hole near open-ended one end, is provided with the reference column 151 of being connected with the locating hole on the inner wall of spread groove for the barrier member 15 can pass through spread groove and the more stable primary connection of reference column 151 on casing 11 down.

An inner concave step 111 is provided on the outer peripheral side of one end of the lower case 11 close to the opening, and the sealing portion 14 is filled in the concave step 111.

The side wall of the concave step 111 is provided with a first convex part 112a, so that the sealing part 14 can form a fastening connection with the lower shell 11 after the sealing part 14 is injection molded.

The first projection 112b may be punched from the inner side wall of the lower case 11 as shown in fig. 3, or the first projection 112a may be welded to the outer side wall of the lower case 11 as shown in fig. 2.

The first convex portion may be a complete ring structure around the lower housing 11, or may be a plurality of plate structures spaced along the circumferential side of the lower housing 11.

The utility model discloses in, upper cover 12 includes apron portion 121 and cover section of thick bamboo 122, and apron portion 121 seals the opening, and cover section of thick bamboo 122 parcel is provided with through-hole 123 in the week side of casing 11 down on the cover section of thick bamboo, and the intussuseption of through-hole 123 is filled with sealing 14.

The through holes 123 are provided in plural, one through hole 123 is reserved to be used as an injection molding port, the lower shell 11 and the upper cover 12 are mutually pressed during injection molding, and the external gap between the lower shell 11 and the upper cover 12 and the other through holes 123 are simultaneously blocked (air outlets for injection molding and exhausting air can also be reserved).

The inner wall of the cover cylinder 122 in this embodiment is provided with a second protrusion 124, so that the sealing part 14 can form a fastening connection with the upper cover 12 after the sealing part 14 is injection molded. The second protrusion 124 is offset from the first protrusion 112a, so that the space between the lower case 11 and the upper cover 12 is better utilized.

In this embodiment, a slit line may be scribed on the outer side of the cap cylinder 122, and the second protrusion 124 may be formed while the through hole 123 is formed by punching from the outer side of the cap cylinder 122 aligned with the slit line.

In this embodiment, the inner wall of the cover cylinder part 122 forms the interference positioning contact with the spacer 15, so that after the lower casing 11, the upper cover 12 and the spacer 15 are assembled, the three can form a preliminary connection structure, and the injection molding operation of the subsequent sealing part 14 is facilitated.

The lithium battery with the reliable packaging structure of the preferred embodiment forms the lower shell and the upper cover into tight sealing connection in a mode of forming the sealing part between the lower shell and the upper cover by injection molding, so that the deformation resistance is stronger, and the structure is reliable.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that the scope of the present invention shall be determined by the scope of the appended claims.

Claims

1. A lithium battery having a reliable package structure, comprising:

one end of the lower shell is provided with an opening;

2. The lithium battery with reliable packaging structure of claim 1, wherein the separator comprises a connection slot, and the separator is wrapped on the edge of the opening by interference fit through the connection slot.

3. The lithium battery with a reliable packaging structure as claimed in claim 2, wherein a positioning hole is provided at an end of the lower case close to the opening, and a positioning post connected with the positioning hole is provided on an inner wall of the connecting groove.

4. The lithium battery with a reliable packaging structure according to claim 1, wherein an outer peripheral side of one end of the lower case near the opening is provided with a concave step, and the sealing portion is filled in the concave step.

5. The lithium battery with reliable packaging structure as claimed in claim 4, wherein the concave step is provided with a first convex portion on a sidewall thereof.

6. The lithium battery with a reliable packaging structure according to claim 5, wherein the first convex portion is formed by punching from an inner side wall of the lower case or is welded to an outer side wall of the lower case.

7. The lithium battery with a reliable package structure according to claim 5, wherein the upper lid includes a lid portion that closes the opening, and a lid barrel portion that wraps around the periphery of the lower case, and a through hole is provided in the lid barrel, the through hole being filled with the sealing portion.

8. The lithium battery with a reliable package structure according to claim 7, wherein a second protrusion is provided on an inner wall of the cap portion, and the second protrusion is offset from the first protrusion.

9. The lithium battery with a reliable package structure according to claim 8, wherein the second projection is formed when the through hole is punched from an outer side of the lid barrel portion.

10. The lithium battery with positive packaging structure of claim 7, wherein the inner wall of the cap portion forms an interference locating contact with the separator.