Soft package battery and electric equipment

Abstract

The utility model relates to the technical field of 3C product batteries, in particular to a soft package battery which comprises a packaging film with a packaging cavity; the battery cell comprises a cell body and a tab connected to the cell body, and the cell body is packaged in the packaging film; the protective layer is made of a self-repairing material, and the protective layer is fixedly attached to at least part of the area of the outer surface of the packaging film. For the soft package battery, when the soft package battery is damaged by abrasion, scratching and the like in the long-term use process, the protective layer is firstly damaged, and the protective layer can realize an automatic repairing process after being damaged, so that manual intervention is not needed, and the cost required by traditional maintenance is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of 3C product batteries, and in particular to a soft-pack battery and electrical equipment. Background Art

[0002] 3C products are a general term for computer, communication, and consumer electronic products, also known as "information appliances." For example, tablet computers, mobile phones, or mobile players, etc. 3C products are generally equipped with batteries to provide energy.

[0003] The batteries in 3C products are mostly soft-pack batteries, which are prone to breakage, scratches, structural aging and other problems during long-term use. Since soft-pack batteries are generally packaged with aluminum-plastic film, the above problems may cause damage to the soft-pack battery structure and affect the performance and reliability of the soft-pack battery.

[0004] In the existing related technologies, when the outer surface of a soft-pack battery is damaged, it is generally necessary to promptly repair or replace the entire soft-pack battery to avoid dangerous situations such as electrolyte leakage, which increases the maintenance cost. Utility Model Content

[0005] The present application provides a soft-pack battery and electrical equipment to solve the technical problem that the soft-pack batteries in current 3C products are easily damaged and have high maintenance costs.

[0006] A soft pack battery, comprising:

[0007] A packaging film having a packaging cavity;

[0008] A battery cell, the battery cell comprising a core body and a tab connected to the core body, the core body being encapsulated in the encapsulation film;

[0009] A protective layer, wherein the protective layer is made of a self-repairing material;

[0010] Wherein, the protective layer is fixedly attached to at least a partial area of ​​the outer surface of the packaging film.

[0011] To implement the above technical solution, for soft-pack batteries, when they are damaged by wear, scratches, etc. during long-term use, the protective layer will be damaged first. After being damaged, the protective layer can realize automatic repair process without human intervention, reducing the energy and cost required for traditional maintenance.

[0012] As one of the optional embodiments of the present solution, the outer surface of the packaging film has a plurality of edges, and the protective layer covers at least part of the edges.

[0013] To implement the above technical solution, the parts of the soft-pack battery that are easily damaged are generally the edges of the packaging film, so the edges are the weak points of the soft-pack battery protection. The above settings can enable the protective layer to better protect the edges of the packaging film to further improve the protection effect, so that the self-repair function of the protective layer can be better applied.

[0014] As one of the optional embodiments of this solution, the soft-pack battery has a first direction and a second direction intersecting each other, the second direction is parallel to the thickness direction of the battery cell, and the tab is located at one end of the first direction;

[0015] The outer surface of the packaging film comprises a first end surface, a circumferential side surface and a second end surface sequentially arranged along the first direction, and the first end surface, the circumferential side surface and the second end surface together form the packaging cavity;

[0016] Among them, the connection position between the first end face and the circumferential side face forms a first edge, the connection position between the circumferential side faces forms a second edge, the connection position between the second end face and the circumferential side face forms a third edge, and the edges are the first edge, the second edge and the third edge.

[0017] As one of the optional embodiments of this solution, the protective layer is arranged to simultaneously cover at least a portion of the first edge, the second edge and the third edge.

[0018] To implement the above technical solution, the edges of the packaging film mainly include a first edge, a second edge and a third edge. This setting further improves the comprehensive coverage of the protective layer for the weak parts of the soft-pack battery. The staff can choose to cover part or all of the first edge, the second edge and the third edge according to different usage environments and the characteristics of the soft-pack battery, so as to achieve reasonable protection for the soft-pack battery with less material.

[0019] As one of the optional embodiments of the present solution, the protective layer includes a first coating layer, a second coating layer and a third coating layer separated from each other, and the first coating layer, the second coating layer and the third coating layer respectively cover at least part of the first edge, the second edge and the third edge.

[0020] To implement the above technical solution, the first coating layer, the second coating layer and the third coating layer are separated from each other so as to be independent of each other, thereby facilitating production and maintenance.

[0021] As one of the optional embodiments of the present solution, the second covering layer includes a second main layer respectively attached to the two side surfaces of the packaging film in the second direction and a second sub-layer connected between the two second main layers, and the thickness of the second main layer in the second direction is greater than the thickness of the second sub-layer in the second direction.

[0022] To implement the above technical solution, since soft-pack batteries are generally stacked along the second direction during use, the sides of adjacent soft-pack batteries facing each other in the first direction are more susceptible to wear and damage. In addition, from the perspective of electrical products and equipment, the side surfaces of the soft-pack batteries in the thickness direction after installation are closer to the external environment. This means that when, for example, an external tool punctures the electrical equipment, the first part to be damaged is the position covered by the second main layer. Therefore, the thickness of the protective layer is appropriately increased in this part so as to better protect the soft-pack batteries while using less material. This is more economical and can better apply the self-healing properties of the protective layer.

[0023] As one of the optional embodiments of the present solution, the third coating layer includes a third main layer and a third sub-layer which are connected to each other, the third main layer is arranged on the circumferential side surface, and the third sub-layer is arranged on the second end surface.

[0024] As one of the optional embodiments of the present solution, the third main layer includes an intermediate layer connected to the third sub-layer and an extension layer connected to one end of the intermediate layer away from the third sub-layer, and the size of the extension layer in the second direction gradually decreases along the direction away from the intermediate layer.

[0025] To implement the above technical solution, when fixing the third coating layer to the outer surface of the packaging film, if the third coating layer is a membrane structure, the operator can choose to first attach the third sub-layer to the second end face, and then attach the third main layer. At this time, if the third sub-layer is offset, the size of the extension layer is gradually reduced to avoid partial area of ​​the extension layer being exposed in the circumferential side range in the second direction, thereby improving fault tolerance and ease of operation; if the third coating layer is a coating, the above setting can also make it easier for the operator to control the coating range of the coating, thereby facilitating operation.

[0026] As one of the optional embodiments of the present solution, the protective layer is configured as a coating, and the coating is applied to the outer surface of the packaging film.

[0027] As one of the optional embodiments of the present solution, the protective layer is configured as a film, and the protective layer is bonded to the outer surface of the packaging film.

[0028] As one of the optional embodiments of this solution, the protective layer is made of a self-healing material based on the principle of micro-nano particles.

[0029] To implement the above technical solution, the specific principle of one of the self-healing materials is disclosed. The self-healing material based on the principle of micro-nano particles integrates microcapsules containing healing agents and chemical triggers with catalytic ability into an epoxy resin matrix. When the matrix is ​​damaged and cracks occur, the microcapsules at the cracks are destroyed and release the healing agent. The healing agent further enters the crack area through capillary action, contacts the chemical trigger and initiates polymerization, and finally repairs the crack area, completing the self-healing process.

[0030] On the other hand, the present application also provides an electrical device, which includes:

[0031] The soft-pack battery in any of the above embodiments.

[0032] One of the above technical solutions has the following advantages or beneficial effects:

[0033] 1. For soft-pack batteries, when they are damaged by wear, scratches, etc. during long-term use, the protective layer is the first to be damaged. After damage, the protective layer can realize automatic repair process without human intervention, reducing the energy and cost required for traditional maintenance.

[0034] 2. According to the characteristics that the parts of soft-pack batteries that are easily damaged are generally the edges of the packaging film and the sides in the thickness direction, the main covering area of ​​the protective layer can cover the edges and sides in the thickness direction of the packaging film. The above settings can enable the protective layer to better protect the edges of the packaging film to further improve the protection effect, so that the self-repair function of the protective layer can be better applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0036] Figure 1 is an overall structural diagram of the soft-pack battery provided in Example 1 of the present application;

[0037] Figure 2 This is an overall exploded structural diagram of the soft-pack battery provided in Example 1 of the present application;

[0038] Figure 3 It is a schematic diagram provided in Example 1 of the present application, mainly used to illustrate the first end face and edge of a soft-pack battery;

[0039] Figure 4 is a schematic diagram for representing the structure of the first coating layer provided in Example 1 of the present application;

[0040] Figure 5 It is provided in Example 1 of the present application and is used to represent the second coating layer and the third coating layer;

[0041] Figure 6 It is a schematic diagram provided in Example 1 of the present application for representing the structure of the third coating layer.

[0042] Reference numerals: 1, packaging film; 11, packaging cavity;

[0043] 2. Battery cell; 21. Core body; 22. Tab;

[0044] 3. Protective layer; 31. First coating layer; 311. First main layer; 312. First secondary layer; 32. Second coating layer; 321. Second main layer; 322. Second secondary layer; 33. Third coating layer; 331. Third main layer; 3311. Intermediate layer; 3312. Extension layer; 332. Third secondary layer;

[0045] 4. edge; 41. first edge; 42. second edge; 43. third edge;

[0046] 51. first end surface; 52. circumferential side surface; 53. second end surface;

[0047] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0050] The following is combined with Figure 1-6 The present application is further described.

[0051] Reference Figure 1 and Figure 2, is a soft-pack battery provided by the present application, which includes a packaging film 1, a battery cell 2 and a protective layer 3. Among them, the packaging film 1 is set to be an aluminum-plastic film, and a packaging cavity 11 is formed in the packaging film 1; the battery cell 2 includes a core body 21 and a pole ear 22 connected to the end of the core body 21, and the core body 21 is formed by winding or stacking multiple positive electrode sheets, negative electrode sheets and separators. The core body 21 is packaged in the packaging film 1, and a portion of the pole ear 22 is exposed from the packaging cavity 11 and extends to the outside of the packaging cavity 11; the protective layer 3 is made of a self-healing material, and the protective layer 3 is fixedly attached to at least a part of the outer surface of the packaging film 1.

[0052] The above setting means that for the soft-pack battery, when the soft-pack battery is damaged by wear, scratches, etc. during long-term use, the protective layer 3 is the first to be damaged. After the damage, the protective layer 3 can realize the automatic repair process without human intervention, reducing the energy and cost required for traditional maintenance and improving the service life of the soft-pack battery.

[0053] It should be noted that self-healing materials refer to materials that can self-repair when damaged. For example, the self-healing materials based on covalent bonds / non-covalent bonds in the current related technologies, or the materials based on the micro-nano particle strengthening principle used in this embodiment. Specifically, the self-healing material based on the micro-nano particle principle integrates microcapsules containing healing agents and chemical triggers with catalytic ability into an epoxy resin matrix. When the matrix is ​​damaged and cracks are generated, the microcapsules at the cracks are destroyed and the healing agents are released. The healing agents enter the crack area through capillary action, contact the chemical trigger and initiate polymerization, and finally repair the crack area to complete the self-healing process.

[0054] Reference Figure 2 and Figure 3, the outer surface of the packaging film 1 has a plurality of edges 4, and the protective layer 3 covers at least part of the edges 4. This is because the part of the soft-pack battery that is easily damaged is generally the edge 4 of the packaging film 1, so the edge 4 is the weak part of the protection of the soft-pack battery. The above setting can enable the protective layer 3 to better protect the edge 4 of the packaging film 1 to further improve the protection effect, so that the self-repair function of the protective layer 3 can be better applied. More specifically, the soft-pack battery is defined to have an intersecting first direction X and a second direction Y, the second direction Y is parallel to the thickness direction of the battery cell 2, and the pole ear 22 is located at one end of the first direction X. The outer surface of the packaging film 1 includes a first end face 51, a circumferential side face 52 and a second end face 53 arranged in sequence along the first direction X, the first end face 51 and the second end face 53 are perpendicular to the first direction X, the circumferential side face 52 is parallel to the first direction X, and the first end face 51, the circumferential side face 52 and the second end face 53 are surrounded to form a packaging cavity 11. Among them, the connection position of the first end face 51 and the circumferential side face 52 forms a first edge 41, the connection position between adjacent circumferential side faces 52 forms a second edge 42, and the connection position of the second end face 53 and the circumferential side face 52 forms a third edge 43. The edges 4 include a first edge 41, a second edge 42 and a third edge 43.

[0055] Reference Figure 2 and Figure 3 , the protective layer 3 simultaneously covers at least a portion of the first edge 41, the second edge 42 and the third edge 43. Specifically, the protective layer 3 includes a first coating layer 31, a second coating layer 32 and a third coating layer 33 that are separated from each other, and the first coating layer 31, the second coating layer 32 and the third coating layer 33 respectively cover at least a portion of the first edge 41, the second edge 42 and the third edge 43. That is, the first coating layer 31, the second coating layer 32 and the third coating layer 33 are separated from each other and have no connection relationship so that the three are independent of each other, which is convenient for production and maintenance.

[0056] The above settings further improve the comprehensive coverage of the protective layer 3 for the weak parts of the soft-pack battery. The staff can choose to cover part or all of the first edge 41, the second edge 42 and the third edge 43 according to different usage environments and the characteristics of the soft-pack battery, so as to achieve reasonable protection of the soft-pack battery with less material.

[0057] It should be noted that in this embodiment, the protective layer 3 is configured as a film structure, and the protective layer 3 is bonded to the outer surface of the packaging film 1. In some other optional embodiments, the protective layer 3 can also be configured as a coating, and the coating is applied to the outer surface of the packaging film 1.

[0058] Reference Figure 2 and Figure 4The first coating layer 31 includes a first main layer 311 and a first sub-layer 312, and the first main layer 311 is attached to one of the sides of the packaging film 1 in the second direction Y, and the first sub-layer 312 is attached to a side of the packaging film 1 in the second direction Y away from the first main layer 311, and the first main layer 311 and the first sub-layer 312 are integrally connected and there is a gap between the first main layer 311 and the first sub-layer 312 in the second direction Y. Among them, the first main layer 311 is an integral strip-shaped regional layered structure, and the first sub-layers 312 are spaced to avoid the tab 22 area. As described above, the first coating layer 31 provides a relatively comprehensive coverage and protection for the first edge 41, and the processing and manufacturing is relatively simple and convenient.

[0059] Reference Figure 2 and Figure 5 , two second coating layers 32 are provided, which are respectively located on both sides of the packaging film 1 in the first direction X, and the two second coating layers 32 can be designed with different sizes according to different actual conditions such as the installation environment. For example, in this embodiment, the sizes of the two second coating layers 32 are quite different. Each second coating layer 32 includes a second main layer 321 respectively attached to the two sides of the packaging film 1 in the second direction Y and a second sub-layer 322 connected between the two second main layers 321. The thickness of the second main layer 321 in the second direction Y is H, and the thickness of the second sub-layer 322 in the second direction Y is h, then H>h. The above setting is because soft-pack batteries are generally stacked along the second direction Y during use, and the sides of adjacent soft-pack batteries facing each other in the first direction X are more susceptible to wear and damage. In addition, from the perspective of electrical products and equipment, the side of the soft-pack battery in the thickness direction after installation is closer to the external environment. This makes it so that when an external tool punctures the electrical equipment, the first part to be damaged is the position covered by the second main layer 321. Therefore, the thickness of the protective layer 3 is appropriately increased in this part so as to better protect the soft-pack battery while using less material, which is more economical and can better apply the self-healing properties of the protective layer 3.

[0060] Reference Figure 2 and Figure 6, two third coating layers 33 are provided and are respectively provided at one end of the packaging film 1 away from the tab 22. Each third coating layer 33 includes a third main layer 331 and a third sub-layer 332 connected to each other, the third main layer 331 is provided on the circumferential side surface 52, and the third sub-layer 332 is provided on the second end surface 53. The third main layer 331 includes an intermediate layer 3311 connected to the third sub-layer 332 and an extension layer 3312 connected to the end of the intermediate layer 3311 away from the third sub-layer 332, and the size of the extension layer 3312 in the second direction Y gradually decreases along the direction away from the intermediate layer 3311. Specifically, in this embodiment, the size of the intermediate layer 3311 in the second direction Y is slightly smaller than the thickness of the packaging film 1, and the extension layer 3312 is set to be an isosceles trapezoid. The above setting is because, when fixing the third coating layer 33 to the outer surface of the packaging film 1, if the third coating layer 33 is a membrane structure, the operator can choose to first attach the third sub-layer 332 to the second end face 53, and then attach the third main layer 331. At this time, if the third sub-layer 332 is offset, the size of the extension layer 3312 is gradually reduced to avoid the extension layer 3312 partially exposing the circumferential side surface 52 in the second direction Y, thereby improving the fault tolerance and ease of operation; if the third coating layer 33 is a coating, the above setting can also facilitate the operator to control the coating range of the coating, which is convenient for operation.

[0061] On the other hand, the present application also provides an electrical device, which includes:

[0062] The soft pack battery mentioned above.

[0063] The above description is only a partial implementation method of the embodiments of the present application and does not constitute any form of limitation on the application. The protection scope of the embodiments of the present application is not limited thereto. Any simple modifications, equivalent changes and modifications that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the embodiments of the present application should be covered within the protection scope of the embodiments of the present application.

Claims

1. A soft pack battery, characterized in that: include: A packaging film (1) having a packaging cavity (11); A battery cell (2), the battery cell (2) comprising a core body (21) and a tab (22) connected to the core body (21), the core body (21) being encapsulated in the encapsulation film (1); A protective layer (3), wherein the protective layer (3) is made of a self-healing material; Wherein, the protective layer (3) is fixedly attached to at least a part of the outer surface of the packaging film (1).

2. The soft pack battery according to claim 1, characterized in that: The outer surface of the packaging film (1) has a plurality of edges (4), and the protective layer (3) covers at least part of the edges (4).

3. The soft pack battery according to claim 2, characterized in that: The soft-pack battery has a first direction (X) and a second direction (Y) that intersect each other, the second direction (Y) is parallel to the thickness direction of the battery cell (2), and the tab (22) is located at one end of the battery cell in the first direction (X); The outer surface of the packaging film (1) comprises a first end surface (51), a circumferential side surface (52), and a second end surface (53) which are sequentially arranged along the first direction (X); The connection position between the first end face (51) and the circumferential side face (52) forms a first edge (41), the connection position between the circumferential side faces (52) forms a second edge (42), the connection position between the second end face (53) and the circumferential side face (52) forms a third edge (43), and the edges (4) include a first edge (41), a second edge (42) and a third edge (43).

4. The soft pack battery according to claim 3, characterized in that: The protective layer (3) covers at least a partial area of ​​the first edge (41), at least a partial area of ​​the second edge (42), and at least a partial area of ​​the third edge (43).

5. The soft pack battery according to claim 4, characterized in that: The protective layer (3) comprises a first coating layer (31), a second coating layer (32) and a third coating layer (33) which are separated from each other, and the first coating layer (31), the second coating layer (32) and the third coating layer (33) respectively cover at least part of the first edge (41), the second edge (42) and the third edge (43).

6. The soft pack battery according to claim 5, characterized in that: The second coating layer (32) comprises a second main layer (321) respectively attached to the packaging film (1) on both sides in the second direction (Y), and a second sub-layer (322) connected between the two second main layers (321), wherein the thickness of the second main layer (321) in the second direction (Y) is greater than the thickness of the second sub-layer (322) in the second direction (Y).

7. The soft pack battery according to claim 5, characterized in that: The third coating layer (33) comprises a third main layer (331) and a third secondary layer (332) which are connected to each other, the third main layer (331) is arranged on the circumferential side surface (52), and the third secondary layer (332) is arranged on the second end surface (53).

8. The soft pack battery according to claim 7, characterized in that: The third main layer (331) includes an intermediate layer (3311) connected to the third sub-layer (332) and an extension layer (3312) connected to one end of the intermediate layer (3311) away from the third sub-layer (332), and the size of the extension layer (3312) in the second direction (Y) gradually decreases along the direction away from the intermediate layer (3311).

9. The soft pack battery according to any one of claims 1 to 8, characterized in that: The protective layer (3) is configured as a coating, and the coating is applied to the outer surface of the packaging film (1); Alternatively, the protective layer (3) is configured as a film, and the protective layer (3) is bonded to the outer surface of the packaging film (1); Alternatively, the protective layer (3) is made of a self-repairing material based on the principle of micro-nano particles.

10. An electrical device, characterized in that: include: The soft pack battery according to any one of claims 1 to 9.

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