CN215680800U

CN215680800U - Laminate polymer battery with hem

Info

Publication number: CN215680800U
Application number: CN202121104845.7U
Authority: CN
Inventors: 罗敬; 陈国栋; 杨超群; 余志�; 于子龙; 王传宝; 陈杰
Original assignee: Dongguan Liwinon Energy Technology Co ltd
Current assignee: Dongguan Liwinon Energy Technology Co ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2022-01-28
Anticipated expiration: 2031-05-19

Abstract

The utility model belongs to the technical field of battery manufacturing processes, and particularly relates to a flexible package battery with a folded edge. The utility model has compact structure, stability and reliability, can reduce the occupied volume of the battery, effectively improves the energy density of the battery cell, and also effectively improves the endurance capacity of the battery cell.

Description

Laminate polymer battery with hem

Technical Field

The utility model belongs to the technical field of battery manufacturing processes, and particularly relates to a soft package battery with a folded edge.

Background

The soft package lithium ion battery has the characteristics of light weight, large capacity, wide working temperature range, environmental friendliness and the like, and has become an important choice for energy storage of various digital products and wearable and mobile electronic products. In recent years, consumer electronic products have been rapidly popularized, and the size of the power supply has been reduced with the size reduction of the products, and the products are required to be portable and have good charging performance, so that the size of a soft package lithium ion battery, which is a common power supply, is required to be more severe.

In the design of battery structures, in order to meet higher requirements of user experience, battery cells are continuously developed toward small volumes, and therefore, the development of small lithium ion battery cells with consideration of energy density is one of the important development directions of future batteries. The inventor finds that the existing battery cell can only meet the requirements of conventional consumer products generally, has low energy density and poor endurance, cannot give consideration to the reduction of the battery cell volume and the improvement of the energy density, and cannot meet the power supply requirements of small electronic products. Therefore, a new battery structure is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the soft package battery with the folded edge is compact in structure, stable and reliable, not only can reduce the volume of the battery, but also effectively improves the energy density of the battery cell and effectively improves the cruising ability of the battery cell.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a laminate polymer battery with hem, includes electric core and encapsulation bag, the encapsulation bag includes this somatic part and encloses the banding of locating this somatic part, electric core holding in this somatic part, the banding along the folding hem portion that forms of the uplift direction of this somatic part, the hem portion encloses and locates this somatic part, wherein, the banding is located the edge of hem portion, the uplift direction of this somatic part is the thickness direction of electric core.

As an improvement of the pouch battery with a folded edge according to the present invention, the height of the folded edge portion is equal to or lower than the height of the body portion, so that the folded edge portion does not occupy too much volume of the entire battery.

As an improvement of the pouch battery with a folded edge according to the present invention, the folded edge includes an upper folded edge portion and side folded edge portions, and the side folded edge portions are disposed on left and right sides of the upper folded edge portion.

As an improvement of the soft-package battery with the folded edge, the tab of the battery cell is arranged at the upper folded edge part, and the end part of the tab is exposed out of the upper folded edge part.

As an improvement of the pouch battery with a folded edge according to the present invention, the upper folded edge portion is perpendicular to the bottom of the body portion, thereby making the structure of the battery more stable and compact.

As an improvement of the pouch battery with a folded edge according to the present invention, a groove is formed between the side folded edge portion and the body portion, and the groove is used for improving the heat dissipation performance of the battery.

As an improvement of the pouch battery with a folded edge according to the present invention, a rounded corner structure is provided at a lower end of the side folded edge portion, and an upper end of the side folded edge portion is bonded to the upper folded edge portion.

As an improvement of the soft package battery with the folded edge, the upper folded edge part is bonded to the side folded edge part, and the end part of the upper folded edge part is folded outwards to form an outward folded part.

As an improvement of the pouch battery with a folded edge according to the present invention, the side folded edge portion is folded inward to form an inward folded portion, and the inward folded portion is adhered to the upper folded edge portion and the body portion.

As an improvement of the pouch battery with a folded edge according to the present invention, the inward folded portion is formed with a U-shaped groove, the U-shaped groove is disposed between the upper folded portion and the body portion, and the U-shaped groove is opened at both sides of the battery, so as to effectively improve the heat dissipation performance of the battery.

The utility model has the beneficial effects that: the battery comprises a battery core and a packaging bag, wherein the packaging bag comprises a body part and a sealing edge surrounding the body part, the battery core is accommodated in the body part, the sealing edge is folded along the rising direction of the body part to form a hem part, the hem part is surrounded on the body part, and the side sealing edge and the top sealing edge of the battery can be folded along the rising direction of the body part and surround the body part, so that the volume of the battery is effectively reduced.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a second schematic structural diagram of embodiment 1 of the present invention.

Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.

Wherein: 1-electric core; 2-packaging the mixture in bags; 10-a tab; 20-a body portion; 21-edge sealing; 22-a hem portion; 221-upper hem part; 222-side hem portion; 2211-eversion fold; 2221-inflected section.

Detailed Description

As used in this specification and the appended claims, certain terms are used to refer to particular components, and it will be appreciated by those skilled in the art that a manufacturer may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The present invention will be described in further detail with reference to the accompanying drawings 1 to 3 and specific examples, but the present invention is not limited thereto.

Example 1

The utility model provides a laminate polymer battery with hem, as shown in fig. 1, including electric core 1 and encapsulation bag 2, encapsulation bag 2 includes body portion 20 and encloses the banding 21 of locating body portion 20, and electric core 1 holding is in encapsulation bag 2's body portion 20, and banding 21 is folding along the uplift direction of body portion 20 and is formed hem portion 22, and hem portion 22 encloses and locates body portion 20 to make the side banding and the top banding of battery jack-up, and reduced laminate polymer battery's occupation volume effectively.

Wherein, encapsulation bag 2 can be the plastic-aluminum membrane sack, and banding 21 both had been regarded as the edge of encapsulation bag 2, also regarded as the edge of hem portion 22, and electric core 1 holding is in the inside of this somatic part 20, and in laminate polymer battery, the bottom of this somatic part 20 is leveled, and the top of this somatic part 20 is followed the thickness direction uplift of electric core 1.

Preferably, the height parallel and level of hem portion 22 is in or is less than the height of this somatic part 20, and the height of this somatic part 20 is greater than the thickness of electric core 1, and the height that highly is less than this somatic part 20 of control hem portion 22 can guarantee that the side banding and the top banding of battery can not be overlength to make laminate polymer battery's size, occupation volume and energy density all obtain balanced compromise.

Specifically, the folding part 22 includes an upper folding part 221 and side folding parts 222, and the side folding parts 222 are disposed on the left and right sides of the upper folding part 221, wherein the side folding parts 222 are disposed on the left and right sides of the main body part 20, the side sealing edge of the battery is adjusted in position by the side folding parts 222, the top sealing edge of the battery is adjusted in position by the upper folding part 221, and the volume of the pouch battery is effectively reduced.

In addition, in the soft package battery, the pole piece and the diaphragm of the battery cell 1 are both disposed inside the body portion 20 of the package bag 2, the tab 10 of the battery cell 1 is disposed in the upper folded edge portion 221, the end portion of the tab 10 is exposed out of the upper folded edge portion 221, the end portion of the tab 10 extends out from the inside of the upper folded edge portion 221, and flexible power supply of the soft package battery can be guaranteed.

Preferably, in order to secure the best crimping effect, the upper crimping portion 221 is perpendicular to the bottom of the body part 20, and the upper crimping portion 221 is perpendicular to the side crimping portion 222, thereby making the overall structure of the pouch battery more stable and compact.

Preferably, in order to improve the heat dissipation performance of the main body portion 20, a groove is formed between the side folded portion 222 and the main body portion 20.

In addition, in the pouch battery, the lower end of the side flange 222 is provided with a rounded structure, and the upper end of the side flange 222 is bonded to the upper flange 221, so that the occupied volume of the pouch battery is reduced.

As shown in fig. 2, in order to improve the structural stability of the battery and to fold the end of the top edge seal of the battery in a triangular manner, the upper edge fold 221 is adhered to the side edge fold 222, the end of the upper edge fold 221 is folded outwards to form an outward folded part 2211, and the outward folded part 2211 and the upper edge fold 221 are adhered and shaped, so that the packaging effect of the battery can be effectively improved, and the occupied volume of the soft-package battery is reduced.

Example 2

Unlike embodiment 1, in the pouch battery having a folded edge, as shown in fig. 3, the side folded edge portion 222 is folded inward to form the inward folded portion 2221 instead of the outward folded portion 2211 at the upper folded edge portion 221, and the inward folded portion 2221 is bonded to the upper folded edge portion 221 and the body portion 20, and the folding of the side folded edge portion 222 can effectively improve the packing effect of the battery and reduce the occupied volume of the pouch battery.

Preferably, the inward-folded part 2221 is formed with a U-shaped groove, the U-shaped groove is disposed between the upper folded part 221 and the body part 20, the U-shaped groove is opened at both sides of the battery, and two grooves formed between the side folded part 222 and the body part 20 are respectively communicated with the U-shaped groove, thereby effectively improving the heat dissipation performance of the battery.

Other structures of this embodiment are the same as those of embodiment 1, and are not described herein again.

Obviously, the utility model has high energy density and strong cruising ability, can both reduce the volume of the battery and improve the energy density, and meets the power supply requirement of small electronic products.

Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the utility model as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. The utility model provides a laminate polymer battery with hem which characterized in that: including electric core (1) and encapsulation bag (2), encapsulation bag (2) include body portion (20) and enclose and locate banding (21) of body portion (20), electric core (1) holding in body portion (20), banding (21) are folded along the direction of the uplift of body portion (20) and are formed hem portion (22), hem portion (22) enclose locate body portion (20).

2. The pouch cell with a flap according to claim 1, wherein: the height of the flange part (22) is equal to or lower than the height of the body part (20).

3. The pouch battery with a folded edge according to any one of claims 1 to 2, wherein: the hem part (22) includes an upper hem part (221) and side hem parts (222), and the side hem parts (222) are provided on both left and right sides of the upper hem part (221).

4. The pouch cell with a flap according to claim 3, wherein: the tab (10) of the battery cell (1) is arranged on the upper flanging part (221), and the end part of the tab (10) is exposed out of the upper flanging part (221).

5. The pouch cell with a flap according to claim 3, wherein: the upper hem portion (221) is perpendicular to the bottom of the body portion (20).

6. The pouch cell with a flap according to claim 3, wherein: a groove is formed between the side flange part (222) and the body part (20).

7. The pouch cell with a flap according to claim 3, wherein: the lower end part of the side flanging part (222) is provided with a rounding structure.

8. The pouch cell with a flap according to claim 3, wherein: the upper hem portion (221) is bonded to the side hem portions (222), and ends of the upper hem portion (221) are folded outward to form out-folded portions (2211).

9. The pouch cell with a flap according to claim 3, wherein: the side gusset portion (222) is folded inwardly to form an inner gusset portion (2221), and the inner gusset portion (2221) is adhered to the upper gusset portion (221) and the body portion (20).

10. The pouch cell with a flap according to claim 9, wherein: the inward folded part (2221) is formed with a U-shaped groove provided between the upper folded part (221) and the body part (20).