Soft package battery structure and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a soft package battery structure and electric equipment. The soft package battery structure comprises a battery cell body, a supporting sealing edge, at least one first side sealing edge and at least one second side sealing edge, the battery cell body is connected to one surface of the supporting sealing edge; the first side sealing edge is connected to one side end of the supporting sealing edge and is folded towards one side surface of the battery cell body; the second side sealing edge comprises a side folding edge part and an inner folding part connected with the side folding edge part; the side folding edge part is connected to the other side end of the supporting sealing edge and is folded towards the other side surface of the battery cell body; and one end of the inner folding part is arranged between one side surface of the battery cell body and the first side sealing edge in a folding manner. According to the utility model, the occupied volume of the soft package battery structure can be effectively reduced, and the compactness and the stability of the structure are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a soft-pack battery structure and electrical equipment. Background Art

[0002] Soft-pack lithium-ion batteries, with their light weight, large capacity, wide operating temperature range, and environmental friendliness, have become an important choice for energy storage in various digital products, as well as wearable and mobile electronic products. In recent years, with the rapid popularization of consumer electronic products, the size of these products has become smaller, making the power supply smaller. At the same time, these products require the power supply to be easy to carry and have good charging performance. Therefore, this puts forward more stringent requirements on the size of soft-pack lithium-ion batteries as a common power source.

[0003] However, most existing soft-pack battery structures have an additional raised structure on the outer ring surface. The raised portion of the raised structure extends greatly reduces the overall flatness and is also susceptible to collision and friction contact, resulting in poor structural stability and low safety in use. Utility Model Content

[0004] The purpose of the utility model is to provide a soft-pack battery structure and electrical equipment to improve the compactness and stability of the structure in view of the deficiencies in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A soft-pack battery structure comprises a battery cell body, a supporting edge seal, at least one first side edge seal and at least one second side edge seal; the battery cell body is connected to a surface of the supporting edge seal; the first side edge seal is connected to one side end of the supporting edge seal and is folded toward one side of the battery cell body; the second side edge seal comprises a side folding portion and an inward folding portion connected to the side folding portion; the side folding portion is connected to the other side end of the supporting edge seal and is folded toward the other side of the battery cell body; one end of the inward folding portion is folded between one side of the battery cell body and the first side edge seal.

[0007] Preferably, the relationship between the length L1 of the inwardly folded portion and the length L2 of the battery cell body satisfies: L1<L2.

[0008] Preferably, the relationship between the width H1 of the inward folded portion and the width H2 of the battery cell body satisfies: H1<H2.

[0009] Preferably: the first side edge seal includes an abutting portion and a flip contact portion connected to the abutting portion; the abutting portion is connected to the folded inward folded portion; and the flip contact portion is folded and arranged on one side of the battery cell body.

[0010] Preferably: a pole ear structure is provided at one end of the first side edge seal away from the supporting edge seal; and the pole ear structure includes a first connecting section and a second connecting section connected to the first connecting section; and the first connecting section is connected to the first side edge seal; and the second connecting section is folded and connected to a side surface of the battery cell body.

[0011] Preferably: the soft-pack battery structure further includes a buffer pad, which is connected to a side surface of the battery cell body and is arranged between the inward folded portion and the battery cell body and / or between the first side seal and the battery cell body.

[0012] Preferably, the buffer pad is a rubber pad or a buffer cotton pad.

[0013] Preferably: the relationship between the projection area S1 of the buffer pad toward the side surface of the battery body and the surface area S2 of the side surface of the battery body satisfies: S1≤S2; and / or the relationship between the projection area S3 of the first side edge seal toward the side surface of the battery body after folding and the projection area S1 of the buffer pad toward the side surface of the battery body satisfies: S1≤S3;

[0014] Furthermore, the relationship between the projection area S3 of the first side edge seal toward the side surface of the battery cell body after being folded and the surface area S2 of the side surface of the battery cell body satisfies: S2≤S3.

[0015] Preferably: the soft-pack battery structure also includes an adhesive component, which is bonded between the battery cell body and the buffer pad and / or between the battery cell body and the second side seal and / or between the battery cell body and the first side seal and / or between the battery cell body and the supporting seal and / or between the first side seal and the inward folded portion.

[0016] The utility model also discloses an electric device, comprising the soft-pack battery structure described above.

[0017] The beneficial effect of the utility model lies in that the technical solution can avoid the surface unevenness of the soft-pack battery structure caused by the outward protrusion of the inward folded portion of the second side edge seal, by folding the inward folded portion between the battery cell body and the first side edge seal, thereby effectively reducing the occupied volume of the soft-pack battery structure, improving the compactness and stability of the structure, and effectively improving the energy density of the battery cell body and improving the endurance of the battery cell body; in addition, the outer edge packaging effect of the battery cell body by the supporting edge seal, the first side edge seal and the second side edge seal can improve the protection of the battery cell body, so as to promote the safety performance of the soft-pack battery structure; thereby improving the performance and stability of the soft-pack battery structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following will refer to the attached Figures 1 to 5 To describe the features, advantages and technical effects of exemplary embodiments of the present utility model.

[0019] Figure 1 This is a schematic structural diagram of a soft-pack battery structure according to an embodiment of the utility model;

[0020] Figure 2 This is a schematic structural diagram of a soft-pack battery structure according to an embodiment of the utility model;

[0021] Figure 3 This is a partial enlarged view of the soft-pack battery structure of an embodiment of the utility model;

[0022] Figure 4 This is a schematic structural diagram of a soft-pack battery structure according to an embodiment of the utility model;

[0023] Figure 5 This is a partial enlarged view of the soft-pack battery structure of an embodiment of the utility model.

[0024] In the figure: 1-battery cell body; 2-second side edge seal; 21-inward folding portion; 22-side folding portion; 3-support edge seal; 4-first side edge seal; 41-ear structure; 411-first connecting section; 412-second connecting section; 401-abutting portion; 402-flip contact portion; 5-buffer pad. DETAILED DESCRIPTION

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0026] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In the description of the embodiments of the present application, the term "and / or" is merely an association relationship between a soft-pack battery structure and an electrical device to describe associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and multiple situations exist alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are an "or" relationship between a soft-pack battery structure and an electrical device.

[0029] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0030] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0031] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0032] The following is combined with Figure 1 to Figure 5 The utility model is further described in detail, but it is not intended to limit the utility model.

[0033] like Figure 1 As shown, in one embodiment of the utility model, the soft-pack battery structure includes a battery cell body 1, a supporting edge seal 3, at least one first side edge seal 4 and at least one second side edge seal 2; the battery cell body 1 is connected to a surface of the supporting edge seal 3; the first side edge seal 4 is connected to one side end of the supporting edge seal 3, and is folded toward one side of the battery cell body 1; the second side edge seal 2 includes a side folding portion 22 and an inward folding portion 21 connected to the side folding portion 22; the side folding portion 22 is connected to the other side end of the supporting edge seal 3, and is folded toward the other side of the battery cell body 1; one end of the inward folding portion 21 is folded between one side of the battery cell body 1 and the first side edge seal 4.

[0034] The technical solution of the utility model can avoid the surface unevenness of the soft-pack battery structure caused by the outward protrusion and extension of the inward folded portion of the second side edge seal, thereby effectively reducing the occupied volume of the soft-pack battery structure, improving the compactness and stability of the structure, and effectively improving the energy density of the battery body and improving the endurance of the battery body; in addition, the outer edge packaging effect of the battery body by the supporting edge seal, the first side edge seal and the second side edge seal can improve the protection of the battery body, so as to promote the safety performance of the soft-pack battery structure; thereby improving the performance and stability of the soft-pack battery structure.

[0035] Wherein, in some embodiments, Figure 1 and 2 As shown, the number of the first side edge seal 4 is one, and it is connected to the upper end surface of the supporting edge seal 3; the number of the second side edge seal 2 is two, and they are respectively connected to the two side end surfaces of the supporting edge seal 3; and the second side edge seal 2 is located on the left and right sides of the first side edge seal 4. In other embodiments (not shown in the figure), the number of the first side edge seal 4 is two, and they are respectively connected to the upper and lower end surfaces of the supporting edge seal 3; the number of the second side edge seal 2 is two, and they are respectively connected to the two side end surfaces of the supporting edge seal 3; and the second side edge seal 2 is located on the left and right sides of the first side edge seal 4.

[0036] Specifically, in some embodiments, Figure 1 and 2As shown, the first side edge seal 4 includes an abutting portion 401 and a flip contact portion 402 connected to the abutting portion 401; the abutting portion 401 is connected to the folded inward folding portion 21; and the flip contact portion 402 is folded and arranged on one side of the battery body 1. In other words, the first side edge seal 4 assembled with the inward folding portion 21 and the battery body 1 in sections can ensure the orderliness of the lead-out of the positive or negative electrode of the battery cell and the stability of the assembly.

[0037] Specifically, in some embodiments, Figure 1 and 2 As shown, a pole ear structure 41 is provided at one end of the first side edge seal 4 away from the supporting edge seal 3; and the pole ear structure 41 includes a first connecting section 411 and a second connecting section 412 connected to the first connecting section 411; and the first connecting section 411 is connected to the first side edge seal 4; and the second connecting section 412 is folded and connected to one side of the battery body 1. By arranging the pole ear structure externally to the first side edge seal 4, the power supply flexibility of the soft-pack battery can be guaranteed.

[0038] Specifically, in some embodiments, Figure 2 and 3 As shown, the relationship between the length L1 of the inward folded portion 21 and the length L2 of the battery body 1 satisfies: L1<L2; wherein L1=1 / 3*L2. And the relationship between the width H1 of the inward folded portion 21 and the width H2 of the battery body 1 satisfies: H1<H2; wherein H2-H1=(0.1~2)mm. This structure improves the compactness of the overall structure and the stability of the structure through the inward folded portion 21 of effective specifications, thereby reducing the occupied volume of the battery and effectively improving the energy density of the battery.

[0039] Specifically, in some embodiments, Figure 4 As shown, the soft-pack battery structure also includes a buffer pad 5, which is connected to one side of the battery cell body 1 and is arranged between the inward folded portion 21 and the battery cell body 1 and / or between the first side edge seal 4 and the battery cell body 1. That is to say, in one embodiment, the buffer pad 5 is only arranged between the inward folded portion 21 and the battery cell body 1, and a buffering effect is achieved by reserving an assembly gap between the first side edge seal 4 and the battery cell body 1. In another embodiment, the buffer pad 5 is only between the first side edge seal 4 and the battery cell body 1. The risk of the head of the battery cell body falling and failing can be effectively reduced by the buffer pad 5 at the middle end. In another embodiment, the buffer pad 5 is arranged between the inward folded portion 21 and the battery cell body 1 and between the first side edge seal 4 and the battery cell body 1. The buffer pad 5 with multiple sections can increase the coverage of the buffer, thereby improving the protection performance.

[0040] The buffer pad 5 is a rubber pad or a buffer cotton pad, which can reduce the stress of the battery body caused by the drop impact, and can effectively reduce the cost of the structure, thereby improving the performance.

[0041] Specifically, in some embodiments, Figure 4 and 5 As shown, the relationship between the projection area S1 of the buffer pad 5 toward one side of the battery body 1 and the surface area S2 of the one side of the battery body 1 satisfies: S1≤S2. Among them, the relationship between the projection area S3 of the first side seal 4 toward one side of the battery body 1 after folding and the projection area S1 of the buffer pad 5 toward one side of the battery body 1 satisfies: S1≤S3; and S2≤S3. In other words, the compactness of the assembly can be effectively improved by using the relatively smallest buffer pad 5, and the unevenness of the surface of the soft-pack battery structure caused by the extension and exposure of the buffer pad 5 can be avoided. The relatively large first side seal 4 can improve the full coverage protection of one side of the battery body 1 as much as possible; thereby, the compactness of the assembly and the assembly stability of the battery body can be improved.

[0042] Specifically, in some embodiments, the soft-pack battery structure further includes an adhesive component (not shown in the figure), which is bonded between the battery cell body 1 and the buffer pad 5 and / or between the battery cell body 1 and the second side edge seal 2 and / or between the battery cell body 1 and the first side edge seal 4 and / or between the battery cell body 1 and the supporting edge seal 3 and / or between the first side edge seal 4 and the inward folded portion 21. The adhesive component is double-sided tape or UV glue. In other words, the edge seals are bonded and fixed to each other, and the edge seals, buffer pads and battery cell body 1 are bonded and fixed with UV glue or double-sided tape, which can further improve the stability of assembly and ensure the safety and smoothness of use.

[0043] The utility model also proposes an electric device, which includes a soft-pack battery structure. The specific structure of the soft-pack battery structure refers to the above embodiment. Since the electric device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0044] Among them, the electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. The embodiments of the present application do not impose special restrictions on the above-mentioned electrical equipment.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0046] According to the disclosure and teaching of the above description, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the above specific implementation, and any obvious improvement, replacement or modification made by the technicians in this field on the basis of the utility model belongs to the protection scope of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of explanation and do not constitute any limitation to the utility model.

Claims

1. A soft pack battery structure, characterized in that: It includes a battery cell body, a supporting edge seal, at least one first side edge seal and at least one second side edge seal; the battery cell body is connected to a surface of the supporting edge seal; the first side edge seal is connected to one side end of the supporting edge seal and is folded toward one side of the battery cell body; the second side edge seal includes a side folding portion and an inward folding portion connected to the side folding portion; the side folding portion is connected to the other side end of the supporting edge seal and is folded toward the other side of the battery cell body; one end of the inward folding portion is folded between one side of the battery cell body and the first side edge seal.

2. The soft pack battery structure according to claim 1, characterized in that: The relationship between the length L1 of the inward folded portion and the length L2 of the battery cell body satisfies: L1<L2.

3. The soft pack battery structure according to claim 1 or 2, characterized in that: The relationship between the width H1 of the inward folded portion and the width H2 of the battery cell body satisfies: H1<H2.

4. The soft pack battery structure according to claim 1, characterized in that: The first side sealing edge comprises a contact portion and a flip contact portion connected to the contact portion; the contact portion is connected to the folded inward folded portion; and the flip contact portion is folded and arranged on one side of the battery cell body.

5. The soft pack battery structure according to claim 1 or 4, characterized in that: A pole ear structure is provided at one end of the first side edge seal away from the supporting edge seal; and the pole ear structure includes a first connecting section and a second connecting section connected to the first connecting section; and the first connecting section is connected to the first side edge seal; and the second connecting section is folded and connected to a side surface of the battery cell body.

6. The soft pack battery structure according to claim 1, characterized in that: The soft-pack battery structure further includes a buffer pad, which is connected to a side surface of the battery cell body and is disposed between the inwardly folded portion and the battery cell body and / or between the first side seal and the battery cell body.

7. The soft pack battery structure according to claim 6, characterized in that: The buffer pad is a rubber pad or a buffer cotton pad.

8. The soft pack battery structure according to claim 6 or 7, characterized in that: The relationship between the projection area S1 of the buffer pad toward the side surface of the battery body and the surface area S2 of the side surface of the battery body satisfies: S1≤S2; and / or the relationship between the projection area S3 of the first side edge seal toward the side surface of the battery body after folding and the projection area S1 of the buffer pad toward the side surface of the battery body satisfies: S1≤S3; Furthermore, the relationship between the projection area S3 of the first side edge seal toward the side surface of the battery cell body after being folded and the surface area S2 of the side surface of the battery cell body satisfies: S2≤S3.

9. The soft pack battery structure according to claim 6, characterized in that: The soft-pack battery structure also includes an adhesive component, which is bonded between the battery cell body and the buffer pad and / or between the battery cell body and the second side seal and / or between the battery cell body and the first side seal and / or between the battery cell body and the supporting seal and / or between the first side seal and the inward folded portion.

10. An electrical equipment, characterized in that: The soft-pack battery structure comprises any one of claims 1 to 9.

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