CN220042042U

CN220042042U - Soft package battery and electronic equipment

Info

Publication number: CN220042042U
Application number: CN202321637285.0U
Authority: CN
Inventors: 陆剑雄; 龚永锋; 谢安河; 赵云龙; 于子龙; 陈杰; 杨山; 杨山山; 余超超; 马江辉; 项海标
Original assignee: Zhejiang Liwei Energy Technology Co ltd
Current assignee: Zhejiang Liwei Energy Technology Co ltd
Priority date: 2023-06-26
Filing date: 2023-06-26
Publication date: 2023-11-17
Anticipated expiration: 2033-06-26

Abstract

The utility model discloses a soft package battery and an electronic device, wherein the soft package battery comprises: cell and packaging film. The packaging film comprises a main body and two edge folding structures, wherein the two edge folding structures are positioned on two opposite sides of the main body and are connected to the main body. The main body is provided with a storage cavity, and the battery cell is arranged in the storage cavity. The hem structure is buckled and is set up and is formed with the infolding portion to and a plurality of first sub-hem portion, a plurality of first sub-hem portions are along deviating from the direction distribution of main part, and define the holding groove between two adjacent first sub-hem portions, along deviating from the direction of main part, the first sub-hem portion of head end is connected in the main part in a plurality of first sub-hem portions, and the infolding portion is connected in the terminal of the first sub-hem portion of tail end to be located the holding groove. The soft package battery of the embodiment is applied to electronic equipment, and can prevent the tail end of the flanging structure from cutting other components.

Description

Soft package battery and electronic equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a soft package battery and electronic equipment.

Background

In the related art, a soft pack battery is generally used in some smart devices, such as a mobile phone or a watch. In this case, since the space reserved for the pouch cell is fixed, it is extremely important that the pouch cell has a high energy density in a limited space. In the manufacturing process of the existing soft package battery, an aluminum plastic film is generally used for packaging the battery core. After the aluminum plastic film is packaged, the aluminum plastic film is folded for ensuring good sealing performance. The tail end of the flanging structure is usually exposed, so that other components are easily cut, and potential safety hazards are caused.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the soft package battery which is applied to the electronic equipment and can prevent the components from being cut and improve the safety of the electronic equipment.

The utility model also provides electronic equipment with the soft package battery.

According to an embodiment of the utility model, a soft pack battery includes:

a battery cell;

packaging film, including main part and two hem structures, two the hem structure connect respectively in the opposite both sides of main part, the main part has the storage chamber, the electricity core set up in the storage chamber, the hem structure buckle and set up and form interior hem portion and a plurality of first sub-hem portion, a plurality of first sub-hem portion is along deviating from the direction distribution of main part, and adjacent two prescribe a limit to the storage tank between the first sub-hem portion, along deviating from the direction of main part, a plurality of the first sub-hem portion of the head end in the first sub-hem portion connect in the main part, interior hem portion connect in the end of the first sub-hem portion of tail end, and be located in the storage tank.

The soft package battery provided by the embodiment of the utility model has at least the following beneficial effects:

the folding structure is bent and provided with a containing groove, the inner folding part is connected to the tail end of the first sub-folding part, namely the inner folding part is the tail end of the folding structure, is bent and provided towards the containing groove and stretches into the containing groove. Therefore, when the soft package battery is applied to the electronic equipment, the tail end of the flanging structure can be prevented from cutting other components, and the safety of the electronic equipment is improved.

According to some embodiments of the utility model, the hemming structure further comprises a second sub-hemming portion connected between two adjacent sub-hemming portions;

the included angle between the first sub-flanging part and the adjacent second sub-flanging part is more than or equal to 90 degrees.

According to some embodiments of the utility model, the angle between two adjacent first sub-folds is alpha, the angle beta is formed between the inner fold and the first sub-folds at the tail end,

according to some embodiments of the utility model, the angle between the first sub-flange portion and the adjacent second sub-flange portion is equal to 90 °, and 45 ° - β -60 °.

According to some embodiments of the utility model, a gap is provided between an end of the inner folded portion facing away from the first sub-folded portion and an inner wall of the accommodating groove.

According to some embodiments of the utility model, the soft package battery further comprises a pouring sealant, wherein the pouring sealant is arranged in the accommodating groove and wraps one end of the inner folded part, which is away from the first sub-folded part.

According to some embodiments of the utility model, the hemming structure is located between the two end surfaces of the main body in a thickness direction of the main body.

According to some embodiments of the utility model, the length of the inward fold is 1.5mm to 3mm.

An electronic device according to an embodiment of the second aspect comprises the pouch cell of the embodiment of the first aspect.

The electronic equipment according to the embodiment at least comprises the following beneficial effects:

the soft package battery of the embodiment of the first aspect is adopted, the folding structure of the soft package battery is bent and provided with the accommodating groove, the inner folding part is connected to the tail end of the first sub-folding part, namely, the inner folding part is the tail end of the folding structure, and the inner folding part is bent and arranged towards the accommodating groove and stretches into the accommodating groove. Therefore, the tail end of the flanging structure can be prevented from cutting other components, and the safety of the electronic equipment is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic view of a soft pack battery according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is a cross-sectional view of a pouch cell according to another embodiment of the present utility model;

fig. 4 is a cross-sectional view of a pouch cell according to another embodiment of the present utility model;

FIG. 5 is a schematic view of the first sub-hemming portion and the inner hemming portion of FIG. 3;

fig. 6 is a cross-sectional view of a pouch electric cell according to another embodiment of the present utility model.

Reference numerals:

packaging film 100, main body 110, hemming structure 120, first sub-hemming portion 121, inner hem portion 122, accommodation groove 123, and second sub-hemming portion 124.

Cell 200, pouring sealant 300.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In the description of the present utility model, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Soft pack batteries are commonly used in some smart devices, such as cell phones or watches. In this case, since the space reserved for the pouch cell is fixed, it is extremely important that the pouch cell has a high energy density in a limited space. In the manufacturing process of the existing soft package battery, an aluminum plastic film is generally used for packaging the battery core. After the aluminum plastic film is packaged, in order to ensure good sealing performance, the aluminum plastic film is folded to form a folding structure. The tail end of the edge folding structure is usually exposed, however, since the edge of the aluminum plastic film is usually formed by cutting, the edge of the aluminum plastic film is relatively sharp, and after the edge folding structure is formed, the tail end of the edge folding structure may cut other components.

Based on this, an embodiment of the first aspect of the present utility model provides a flexible battery, fig. 1 is a schematic structural diagram of the flexible battery according to an embodiment of the present utility model, fig. 2 is a cross-sectional view of fig. 1, fig. 3 is a cross-sectional view of the flexible battery according to another embodiment of the present utility model, and fig. 4 is a cross-sectional view of the flexible battery according to another embodiment of the present utility model, where the flexible battery includes: cell 200 and packaging film 100.

The packaging film 100 may be formed by folding and packaging an aluminum plastic film, and the packaging film 100 includes a main body 110 and two hemming structures 120, where the two hemming structures 120 are formed on two opposite sides of the main body 110 (for example, two sides of the main body 110 in a width direction) and connected to the main body 110 through a hemming process. The main body 110 has a storage cavity in which the battery cell 200 is disposed. The folding structure 120 is formed with an inner folding portion 122 and a plurality of first sub-folding portions 121, the plurality of first sub-folding portions 121 are distributed along a direction away from the main body 110, and an accommodating groove 123 is defined between two adjacent first sub-folding portions 121, and a cross section of the accommodating groove 123 may be square (as shown in fig. 2) or triangular (as shown in fig. 3). In the direction away from the main body 110, among the plurality of first sub-folded portions 121, the first sub-folded portion 121 at the head end is connected to the main body 110, and the inner folded portion 122 is connected to the tail end of the first sub-folded portion 121 at the tail end, that is, the inner folded portion 122 is the tail end of the folded structure 120. The inner fold portion 122 is folded towards the accommodating groove 123 and is located in the accommodating groove 123, i.e. the tail end of the folding structure 120 is hidden in the accommodating groove 123. When the soft package battery of the embodiment is applied to electronic equipment (such as a watch, a mobile phone and the like), the tail end of the flanging structure 120 can be prevented from cutting other components, and the safety of the electronic equipment is improved.

It should be noted that, in fig. 2, the hemming structure 120 having only one receiving groove 123 is not to be construed as the only limitation of the present embodiment, and according to practical situations, the hemming structure 120 may further have any number of receiving grooves 123, such as two (as shown in fig. 4), three, etc., as long as the inner hem 122 can be located in the receiving groove 123.

Referring to fig. 2, in some embodiments, the hemming structure 120 further includes a second sub-hemming portion 124, the second sub-hemming portion 124 being connected between two adjacent sub-hemming portions. That is, along the curved track of the hemming structure 120, the tail ends of the first two adjacent first sub-hemming portions 121 are connected to the head end of the second sub-hemming portion 124, and the head end of the second first sub-hemming portion 121 is connected to the tail end of the second sub-hemming portion 124. Wherein an included angle between the first sub-hemming portion 121 and the adjacent second sub-hemming portion 124 is 90 ° or more.

Specifically, it can be appreciated that during the process of forming the hemming structure 120, the hemming structure 120 naturally forms a radius at the bending position, and the greater the bending degree, the smaller the radius, and the greater the radius, based on this, the transition is performed by the second sub-hemming portion 124 to reduce the bending degree of the hemming structure 120 at the bending position. For example, the included angle between two adjacent first sub-folded portions 121 is 60 °, when a structure in which two first sub-folded portions 121 are directly connected is adopted, the folded structure 120 forms an included angle of 60 ° at the connection position of the two first sub-folded portions 121, and in this embodiment, the transition is performed through the second sub-folded portion 124, and the included angle between the second sub-folded portion 124 and the two first sub-folded portions 121 may be 120 °, so as to increase the included angle of the folded structure 120 at the folded position. Therefore, the present embodiment can increase the angle of the hemming structure 120 at the bending position by the transition of the second sub-hemming portion 124, thereby increasing the radius of the hem structure 120 at the bending position. In one aspect, the hemming structure 120 is prevented from being damaged by excessive bending. On the other hand, the larger the radius of curvature of the hemming structure 120 at the bend, the more blunt the bend, i.e., the edge formed at the bend is less prone to cutting other parts.

Referring to fig. 5, fig. 5 is a schematic structural diagram of the first sub-hemming portions and the inner hemming portions in fig. 3, in some embodiments, an included angle between two adjacent first sub-hemming portions 121 is α, an included angle β is formed between the inner hemming portion 122 and the first sub-hemming portion 121 at the tail end,specifically, β is greater than 0, that is, the inner folded portion 122 is not completely attached to the first sub-folded portion 121 at the tail end, so that the inner folded portion 122 is prevented from being completely attached to the first sub-folded portion 121 to form a sharp edge at the folded portion, thereby effectively preventing the folded structure 120 from cutting other parts. Beta is less than->The reason is that, in order to locate the folded-in portion 122 in the accommodating groove 123, for example, if α is equal to 60 °, β is smaller than 60 ° (90 ° -30 °), so that the folded-in portion 122 can be secured in the accommodating groove 123.

Based on the above embodiment, the included angle between the first sub-hemming portion 121 and the adjacent second sub-hemming portion 124 is equal to 90 °, and the included angle β between the inner hemming portion 122 and the first sub-hemming portion 121 at the trailing end is equal to or greater than 45 ° and equal to or less than 60 °. So that the edge folding structure 120 does not form a sharp edge at the bending position between the inner folding portion 122 and the first sub-edge folding portion 121 at the tail end, and the inner folding portion 122 can be ensured not to be separated from the accommodating groove 123 due to vibration and the like in the use process while being accommodated in the accommodating groove 123, so as to improve the reliability of the soft package battery of the embodiment.

Referring to fig. 2, in some embodiments, a gap is provided between an end of the inner folded portion 122 facing away from the first sub-folded portion 121 and an inner wall of the receiving portion 123, that is, a gap is provided between a free end of the inner folded portion 122 and the two first sub-folded portions 121 forming the receiving groove 123. The inner folded portion 122 is prevented from cutting the first sub-folded portion 121, thereby reducing the risk of leakage of the pouch cell. Similarly, when the hemming structure 120 further has the second sub-hemming portion 124, the free end of the inner hem portion 122 has a gap similar to the second sub-hemming portion 124.

Referring to fig. 6, fig. 6 is a cross-sectional view of a pouch battery according to another embodiment of the present utility model, and the pouch battery further includes a potting adhesive 300, where the potting adhesive 300 is disposed in the accommodating groove 123 and wraps one end of the inner folded portion 122 facing away from the first sub-folded portion 121. On the one hand, the pouring sealant 300 has a fixing effect on the inner folded portion 122, and can prevent the free end of the inner folded portion 122 from being displaced to be in contact with the first sub-hemming portion 121 due to the factors such as pressing or vibration during use. On the other hand, the sealing performance of the tail end of the edge folding structure 120 can be improved, and the leakage risk of the soft package battery is further reduced.

In some embodiments, the flanging structure 120 is located between both end surfaces of the main body 110 in the thickness direction of the main body 110, i.e., the flanging structure 120 does not protrude from the top and bottom surfaces of the main body 110, preventing the flanging structure 120 from causing an increase in the thickness of the pouch battery, thereby improving the energy density of the pouch battery.

Referring to fig. 5, in some embodiments, the length L of the inner fold portion 122 is in the range of 1.5mm to 3mm, so that the inner fold portion can extend into the accommodating groove to a certain depth, so as to ensure that the inner fold portion 122 is located in the accommodating groove 123, thereby improving the reliability of the soft package battery of the present embodiment.

The electronic device of the second embodiment includes the flexible battery of the first embodiment, the folded structure 120 of the flexible battery is bent to form the accommodating groove 123, the inner folded portion 122 is connected to the tail end of the first sub-folded portion 121, that is, the inner folded portion 122 is the tail end of the folded structure 120, and the inner folded portion 122 is bent towards the accommodating groove 123 and extends into the accommodating groove 123. Therefore, the tail end of the hemming structure 120 can be prevented from cutting other components, and the safety of the electronic device can be improved. It should be noted that, since all technical features of the first embodiment are adopted in this embodiment, this embodiment has all the advantages brought by the soft packet battery of the first embodiment, and will not be described herein again.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model. Furthermore, embodiments of the utility model and features of the embodiments may be combined with each other without conflict.

Claims

1. A pouch cell comprising:

a battery cell;

2. The pouch cell of claim 1, wherein the hemming structure further comprises a second sub-hemming portion connected between two adjacent sub-hemming portions;

3. The flexible battery as recited in claim 2, wherein an included angle between two adjacent first sub-folded portions is α, an included angle β is formed between the inner folded portion and the first sub-folded portion of the trailing end,

4. a pouch cell according to claim 3, wherein the angle between the first sub-flange portion and the adjacent second sub-flange portion is equal to 90 ° and 45 ° - β -60 °.

5. The pouch cell of claim 1, wherein a gap is provided between an end of the inward fold facing away from the first sub-flange portion and an inner wall of the receiving groove.

6. The pouch battery of claim 5, further comprising a potting adhesive disposed in the receiving recess and wrapping an end of the inner fold facing away from the first sub-flange.

7. The pouch cell of claim 1, wherein the hemming structure is located between both end surfaces of the body in a thickness direction of the body.

8. The pouch cell of claim 1, wherein the inward fold has a length of 1.5mm to 3mm.

9. An electronic device comprising the pouch cell of any of claims 1-8.