Soft package battery and electric equipment

Abstract

The utility model discloses a soft package battery and electric equipment. The soft package battery comprises a soft package battery, a battery cell and a tab, the soft package shell comprises a packaging main body and a side sealing edge, the packaging main body is provided with an accommodating cavity, and the tab is connected to the battery cell. The packaging main body comprises two side walls in the width direction of the soft package battery, and a bottom wall and a top wall in the length direction of the soft package battery, the side walls are provided with first receding grooves, the first receding grooves extend to the bottom wall, in the length direction of the soft package battery, the side sealing edges comprise first end faces closer to the bottom wall, the side sealing edges are connected to the side walls, and the first end faces extend to the top wall. The side sealing edge comprises a first extending part, and the first extending part extends into the first receding groove, so that the sealing width of the soft package shell at the connecting position of the side wall and the bottom wall is increased. Therefore, the part, protruding out of the bottom wall, of the side sealing edge can be cut or folded, so that the first end face of the side sealing edge does not protrude out of the bottom wall of the packaging main body, and the sealing effect of the soft package battery at the cut part and after folding is ensured.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a soft-pack battery and an electrical device. Background Technology

[0002] In existing soft-pack lithium-ion battery manufacturing technology, due to the extensibility of aluminum-plastic film, after side sealing, the two sealing edges will protrude from the top seal along the length of the soft-pack battery, resulting in an increase in the length of the soft-pack battery and a decrease in its energy density. Furthermore, since this location is the bottom corner of the soft-pack battery, due to sealing requirements, direct cutting will reduce the sealing effect of this part. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a pouch battery that can achieve high energy density while maintaining high sealing performance.

[0004] This utility model also provides an electrical device that includes the above-mentioned soft-pack battery.

[0005] According to a first aspect of the present invention, the pouch battery has a set width and length, and the pouch battery includes: a pouch casing, a battery cell, and tabs.

[0006] The pouch cell housing includes a main body and side seals. The main body has a receiving cavity. The main body includes two side walls in the width direction of the pouch cell, and a bottom wall and a top wall in the length direction of the pouch cell. The side walls have a first clearance groove that extends to the bottom wall. In the length direction of the pouch cell, the side seals include a first end face closer to the bottom wall. The side seals are connected to the side walls and include a first extension that extends into the first clearance groove. In the direction from the top wall to the bottom wall, the first end face does not protrude from the bottom wall. The battery cell is located in the receiving cavity. The tabs are connected to the battery cell and extend from the top wall.

[0007] The soft-pack battery according to the embodiments of the present invention has at least the following beneficial effects:

[0008] In this embodiment, the outer surface of the soft-pack casing has a first clearance groove, and the side seal includes a first extension that extends into the first clearance groove, thereby increasing the sealing width of the soft-pack casing at the bottom corner (where the side wall and bottom wall connect). Therefore, by cutting or folding the portion of the side seal protruding from the bottom wall, the first end face of the side seal does not protrude from the bottom wall of the encapsulation body, ensuring the sealing effect at the cut or folded points. Thus, in this embodiment, by providing the first extension, the portion of the side seal protruding from the bottom wall of the encapsulation body can be cut or folded without the soft-pack casing leaking liquid, ensuring the first end face of the side seal does not protrude from the bottom wall of the encapsulation body, thereby reducing the length of the soft-pack battery and increasing its energy density.

[0009] According to some embodiments of the present invention, the battery cell includes a second clearance groove, and the soft-pack outer shell includes a recessed portion that is recessed toward the second clearance groove, a portion of the recessed portion being located within the second clearance groove, and the recessed portion having the first clearance groove.

[0010] According to some embodiments of the present invention, the side sealing edge includes a second end face and a third end face that are opposite to each other along its own width direction. The third end face is connected to the side wall. The corner where the second end face and the first end face are connected has a first notch. The first notch extends to the first extension portion.

[0011] According to some embodiments of the present invention, the side sealing edge includes a first sealing edge portion and a second sealing edge portion, wherein the second sealing edge portion is folded toward the first sealing edge portion to form the first notch, and a crease is formed on the side sealing edge.

[0012] According to some embodiments of the present invention, the side sealing edge includes an unsealed area and a sealed area distributed along its own width direction. The unsealed area is connected between the packaging body and the sealed area, and the connection point between the unsealed area and the sealed area is defined as the connection boundary.

[0013] The end of the crease located on the second end face is the first endpoint, and the other end is the second endpoint. Along the width direction of the side seal, the second endpoint is spaced apart from the connecting boundary.

[0014] According to some embodiments of the present invention, along the width direction of the side sealing edge, the distance between the second endpoint and the connection boundary is L, where L≥1mm.

[0015] According to some embodiments of the present invention, the included angle between the crease and the second end face is defined as α, where 130°≤α≤140°.

[0016] According to some embodiments of the present invention, the side sealing edge is folded towards the side wall, and the second sealing edge portion is located within the first clearance groove.

[0017] According to some embodiments of the present invention, the soft-pack outer shell further includes a bottom sealing edge, which is connected to the bottom wall and connected to the first extension. The bottom sealing edge is folded towards the bottom wall and adhered to the bottom wall.

[0018] The electrical device according to a second aspect of the present invention includes: the soft-pack battery described in the first aspect embodiment.

[0019] The electrical equipment according to the embodiments of this utility model has at least the following beneficial effects:

[0020] The pouch battery using the first aspect embodiment has a first clearance groove on the outside of the pouch casing, and the side seal includes a first extension that extends to the first clearance groove, thereby increasing the sealing width of the pouch casing at the bottom corner (where the side wall and bottom wall connect). Therefore, by cutting or folding the portion of the side seal protruding from the bottom wall, the first end face of the side seal does not protrude from the bottom wall of the encapsulation body, ensuring the sealing effect at the cut or folded points. Thus, in this embodiment, by providing the first extension, the portion of the side seal protruding from the bottom wall of the encapsulation body can be cut or folded without leakage from the pouch casing, ensuring the first end face of the side seal does not protrude from the bottom wall of the encapsulation body, thereby reducing the length of the pouch battery, increasing its energy density, and ultimately improving the battery life of the device.

[0021] Additional aspects and advantages of this invention 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 invention. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of a common pouch battery in the prior art;

[0024] Figure 2 for Figure 1 A magnified view of area A in the middle;

[0025] Figure 3 This is a schematic diagram of the structure of the first type of soft-pack battery according to the first aspect of this utility model;

[0026] Figure 4 for Figure 3 A magnified view of area B in the middle;

[0027] Figure 5 This is a schematic diagram of the structure of a second type of soft-pack battery according to the first aspect of this utility model;

[0028] Figure 6 for Figure 5 A magnified view of area C in the middle;

[0029] Figure 7 This is a schematic diagram of the structure of a third type of soft-pack battery according to the first aspect of this utility model;

[0030] Figure 8 for Figure 7 A magnified view of region D in the middle;

[0031] Figure 9 This is a schematic diagram of the structure of the fourth type of soft-pack battery according to the first aspect of this utility model;

[0032] Figure 10 for Figure 9 A magnified view of region E in the middle;

[0033] Figure 11 This is a schematic diagram of the structure of the fifth type of soft-pack battery according to the first aspect of this utility model;

[0034] Figure 12 for Figure 11 A schematic diagram of the structure of the side and bottom sealing edges of a soft-pack battery after folding.

[0035] Figure 13 for Figure 12 A magnified view of area F in the middle;

[0036] Figure 14 This is a schematic diagram showing interference between the side sealing edge and the bottom sealing edge.

[0037] Figure 15 This is a schematic diagram of the structure of the sixth type of soft-pack battery according to the first aspect of this utility model.

[0038] Figure label:

[0039] The protrusion is 1000, and the interference part is 2000.

[0040] The package includes a soft outer shell 100, a main body 110, a side wall 111, a bottom wall 112, a top wall 113, a first clearance groove 114, a receiving cavity 115, a recess 116, a third clearance groove 117, a side sealing edge 120, a first extension 121, a first end face 122, a second end face 123, a first notch 124, a cut edge 1241, a first sealing edge 125, a second sealing edge 126, a crease 127, a first endpoint 128, a second endpoint 129, a sealing area 1201, an unsealed area 1202, a connecting boundary 1203, a bottom sealing edge 130, a second extension 140, a top sealing edge 150, and a second notch 160.

[0041] Battery cell 200, second air-proof slot 210;

[0042] JE300. Detailed Implementation

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0044] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0046] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0047] Reference Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a common pouch battery in the prior art. Figure 2 for Figure 1 An enlarged view of area A shows that in existing soft-pack lithium-ion battery manufacturing technology, due to the extensibility of the aluminum-plastic film, after side sealing, the two sealing edges protrude from the top seal along the length of the soft-pack battery (e.g., Figure 2 The protruding part in the middle increases the length of the soft-pack battery, which reduces the energy density of the soft-pack battery. Since this position is the bottom corner of the soft-pack battery, due to the sealing requirements, direct cutting will reduce the sealing effect of this part and easily lead to leakage of the soft-pack battery.

[0048] In view of the above background, the first aspect of this utility model proposes a soft-pack battery that can achieve high energy density while maintaining high sealing performance. It should be noted that, for ease of explanation, Figures 1 to 13 The length direction refers to the length of the pouch cell, the width direction refers to the width of the pouch cell, and the thickness direction refers to the thickness of the pouch cell. (Refer to...) Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of the first type of soft-pack battery according to the first aspect of this utility model. Figure 4 for Figure 3 An enlarged view of region B in this embodiment shows that the pouch battery includes: a pouch casing 100, a battery cell 200, and tabs 300.

[0049] The soft-pack outer casing 100 is, for example, an aluminum-plastic film, but not limited to this. The soft-pack outer casing 100 includes a packaging body 110 and side sealing edges 120. The packaging body 110 has a receiving cavity 115 and includes two side walls 111 in the width direction of the soft-pack battery, and a bottom wall 112 and a top wall 113 opposite to each other in the length direction of the soft-pack battery. The side wall 111 has a first clearance groove 114, which can be, for example, triangular, concave arc-shaped, or rectangular, and extends to the bottom wall 112. In the length direction of the soft-pack battery, the side sealing edge 120 includes a first end face 122 closer to the bottom wall 112. The side sealing edge 120 is connected to the side wall 111 and includes a first extension 121 extending into the first clearance groove 114. Along the direction from the top wall 113 to the bottom wall 112, the first end face 122 does not protrude from the bottom wall 112. For example, the first end face 122 is flush with the bottom wall 112, or the first end face 122 is located between the bottom wall 112 and the top wall 113. For example, the first end face 122 is formed by cutting or folding the part of the side sealing edge 120 that protrudes from the bottom wall 112. As long as the first end face 122 does not protrude from the bottom wall 112 and occupy additional space, the length of the soft-pack battery can be reduced. The cell 200 is, for example, a stacked cell 200 or a wound cell 200. The cell 200 is located in the receiving cavity 115, and the tab 300 is connected to the cell 200 and extends from the top wall 113.

[0050] Specifically, in this embodiment, the outer surface of the soft-pack casing 100 has a first clearance groove 114, and the side sealing edge 120 includes a first extension 121 that extends to the first clearance groove 114 to increase the sealing width of the soft-pack casing 100 at the bottom corner (where the side wall 111 and the bottom wall 112 connect). (Sealing width: the width of the area where the casing material (such as aluminum-plastic film) of the soft-pack battery is tightly bonded together by heat sealing, ultrasonic sealing, or other encapsulation technologies). Therefore, by cutting or folding the portion of the side sealing edge 120 that protrudes from the bottom wall 112, the first end face 122 of the side sealing edge 120 does not protrude from the bottom wall 112 of the encapsulated body, and the sealing effect at the cut or folded points is guaranteed. Therefore, in this embodiment, by providing the first extension 121, the portion of the side seal 120 protruding from the encapsulation body 110 can be cut or folded without the soft-pack shell 100 leaking liquid, so that the first end face 122 of the side seal 120 does not protrude from the bottom wall 112 of the encapsulation body 110, thereby reducing the length of the soft-pack battery and improving the energy density of the soft-pack battery.

[0051] Reference Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the structure of the second type of soft-pack battery according to the first aspect of this utility model. Figure 6 for Figure 5 In the enlarged view of region C, based on the above embodiment, the battery cell 200 includes a second clearance groove 210, and the soft-pack casing 100 includes a recessed portion 116 recessed towards the second clearance groove 210. A portion of the recessed portion 116 is located within the second clearance groove 210, and the recessed portion 116 has a first clearance groove 114. Specifically, the portion of the recessed portion 116 is located within the second clearance groove 210, meaning that during processing, the recessed portion 116 extends into the second clearance groove 210, thereby reducing the gap between the battery cell 200 and the soft-pack casing 100, making the soft-pack battery structure more compact, and further improving the energy density of the soft-pack battery in this embodiment.

[0052] Reference Figures 5 to 10 , Figure 7 This is a schematic diagram of the structure of the third type of soft-pack battery according to the first aspect of this utility model. Figure 8 for Figure 7 A magnified view of region D in the middle. Figure 9 This is a schematic diagram of the structure of the fourth type of soft-pack battery according to the first aspect of this utility model. Figure 10 for Figure 9In an enlarged view of region E, in some embodiments, the side seal 120 includes a second end face 123 and a third end face facing away from each other along its width direction. The third end face is connected to the side wall 111. The corner where the first end face 122 and the second end face 123 meet has a first notch 124. The first notch 124 extends to the first extension 121, thereby preventing the side seal 120 from protruding from the bottom wall 112 of the packaging body 110, thus improving the energy density of the soft-pack battery in this embodiment. The first notch 124 can be, for example, triangular, concave arc, rectangular, or L-shaped. The first notch 124 is formed, for example, by cutting the side seal 120 (e.g., ...). Figure 6 (As shown). Or, as in some embodiments, the first notch 124 can be formed by folding the side sealing edge 120 (e.g. Figure 8 (As shown). Furthermore, in some embodiments, the first notch 124 is formed by cutting and folding the side sealing edge 120, to... Figure 10 As shown in the example, the crease 127 extends along the width direction of the side seal 120 (when the side seal 120 is not folded towards the side wall 111, the width direction of the side seal 120 corresponds to the width direction of the soft-pack battery; when the side seal 120 is folded towards the side wall 111, the width direction of the side seal 120 corresponds to the thickness direction of the soft-pack battery). One end of the crease 127 is located on the second end face 123, and the other end is spaced apart from the first end face 122, i.e., the other end is not on the first end face 122. Therefore, during processing, a slit is cut to form along the length direction of the soft-pack battery, starting from the first end face 122. Finally, the side seal 120 is folded to form the first notch 124. Similarly, in some embodiments, one end of the crease 127 is located on the first end face 122, and the other end is spaced apart from the second end face 123, which will not be described further here.

[0053] Based on the above embodiment, the side seal 120 includes an unsealed area 1202 and a sealed area 1201 distributed along its width direction. The unsealed area 1202 connects the encapsulation body 110 and the sealed area 1201. The connection point between the unsealed area 1202 and the sealed area 1201 is defined as the connection boundary 1203 (e.g., Figure 8 As shown in the center line, when the first notch 124 is formed by cutting through the side sealing edge 120, the minimum distance between the edge of the first notch 124 and the connecting boundary 1203 is greater than or equal to 1mm, so as to ensure the effective sealing of the side sealing edge 120 and thereby improve the sealing performance of the battery.

[0054] Reference Figure 8In some embodiments, the side seal 120 includes a first sealing portion 125 and a second sealing portion 126. The second sealing portion 126 is folded towards the first sealing portion 125 to form a first notch 124, and a crease 127 is formed on the side seal 120. Specifically, in this embodiment, the first notch 124 of the side seal 120 is formed by folding the second sealing portion 126, without the need to cut the side seal 120, thereby improving the sealing effect of the side seal 120 and improving the sealing performance of the pouch battery. In addition, forming the first notch 124 by folding can prevent the aluminum layer at the first notch 124 from being exposed, which not only reduces the risk of the encapsulation body 110 being cut, but also reduces the risk of short circuit between the aluminum layer and other external components, thereby improving the safety of the pouch battery.

[0055] Reference Figure 8 In some embodiments, the side seal 120 includes an unsealed area 1202 and a sealed area 1201 distributed along its width direction. The unsealed area 1202 connects the encapsulation body 110 and the sealed area 1201. The connection point between the unsealed area 1202 and the sealed area 1201 is defined as the connection boundary 1203 (e.g., Figure 8 As shown by the center line, the end of the crease 127 located on the second end face 123 is the first endpoint 128, and the other end is the second endpoint 129. Along the width direction of the side seal 120, the second endpoint 129 is spaced apart from the connecting boundary 1203. For example, in some embodiments, along the width direction of the side seal 120, the distance between the second endpoint 129 and the connecting boundary 1203 is L, where L ≥ 1 mm, thereby reducing the risk of damage to the pouch battery and improving its performance. Specifically, taking the pouch casing 100 made of aluminum-plastic film as an example, the two layers of aluminum-plastic film in the unsealed area 1202 are not connected, and a sharp corner is formed at the endpoint of the crease 127, meaning the aluminum-plastic film at this location has a larger degree of wrinkling. If the sharp corner is located in the unsealed area 1202, it will increase the risk of breakage of the single layer of aluminum-plastic film in the unsealed area 1202. This embodiment can effectively improve this problem. In this embodiment, the second endpoint 129 is spaced apart from the connecting boundary 1203, that is, the second endpoint 129 of the crease 127 is located in the sealing area 1201. Since the two layers of aluminum-plastic film located in the sealing area 1201 are bonded together, they have higher strength, thereby reducing the risk of the side seal 120 breaking at the second endpoint 129, and thus improving the sealing performance of the soft pack battery in this embodiment.

[0056] It should be noted that, Figure 8 The connection boundary 1203 shown by the center line in this embodiment should not be interpreted as the actual outline of the soft-pack battery. In the actual product, the connection boundary 1203 between the unsealed area 1202 and the sealed area 1201 may be difficult to observe with the naked eye. This embodiment is only clearly explained in order to show the position of the connection boundary 1203 more clearly.

[0057] Reference Figure 8 In some embodiments, the angle between the crease 127 and the second end face 123 is defined as α, where 130° ≤ α ≤ 140°. It is understood that a smaller angle between the crease 127 and the second end face 123 indicates a sharper angle formed after folding, which could easily puncture the soft-pack outer shell 100. Therefore, the angles between the crease 127 and the second end face 123, and between the crease 127 and the first end face 122, should be as blunt as possible; that is, the larger the angles between the crease 127 and the second end face 123, and between the crease 127 and the first end face 122, the better. Thus, in this embodiment, the angle between the first crease 127 and the second end face 123 is set between 130° and 140° to reduce the risk of the soft-pack outer shell 100 being punctured. Specifically, the angle between the crease 127 and the first end face 122 is defined as β. According to the triangle angle sum theorem, α + β = 360° - 90° = 270°. Therefore, if one of the angles is too large, it will result in the other angle being too small. Based on this, in this embodiment, 130° ≤ α ≤ 140° is used to make the angles α and β similar. For example, both α and β are 135° to avoid one angle being too small, thereby reducing the risk of the pouch battery being punctured and improving the sealing performance of the pouch battery in this embodiment.

[0058] Similarly, for example, the first notch 124 is formed by chamfering the side sealing edge 120, and a chamfered edge 1241 is formed on the side sealing edge 120 (e.g. Figure 6 As shown), the angle between the cut edge 1241 and the second end face is θ, 130°≤θ≤140°. The principle is similar to that of ɑ, and will not be elaborated here.

[0059] In some embodiments, the side sealing edge 120 is folded towards the side wall, and the second sealing edge portion 126 is located in the first clearance groove 114. Therefore, the folded second sealing edge portion 126 does not need to occupy additional space in the width direction of the pouch battery, so as to reduce the width of the pouch battery and thereby improve the energy density of the pouch battery in this embodiment.

[0060] Reference Figures 11 to 13 , Figure 11 This is a schematic diagram of the structure of the fifth type of soft-pack battery according to the first aspect of this utility model. Figure 12 for Figure 11 A schematic diagram of the structure of a soft-pack battery after the side and top sealing edges are folded up. Figure 13 for Figure 12 An enlarged view of region F in the middle; in some embodiments, the soft-pack housing 100 also includes a bottom sealing edge 130 (e.g., Figure 11 The bottom sealing edge 130 is connected to the bottom wall 112 and to the first extension 121, and the bottom sealing edge 130 is folded towards the bottom wall 112 (e.g., Figure 12and Figure 13 As shown in the diagram, the battery is bonded to the bottom wall 112. Specifically, a bottom sealing edge 130 is provided on the bottom wall 112 of the encapsulation body 110. The bottom sealing edge 130 can provide a certain degree of protection to the bottom wall 112, which not only enhances the structural stability of the pouch battery, but also improves its resistance to deformation and external impact. During assembly and use, the pouch battery can better maintain its shape and size, thereby extending its service life.

[0061] Furthermore, since the pouch casing 100 is typically thin, after punching, the bottom wall 112 of the encapsulation body 110 is usually curved outwards towards the receiving cavity 115, resulting in an increase in the length of the pouch battery. In this embodiment, the bottom sealing edge 130 is folded towards the bottom wall 112 and bonded to it, thereby bonding the bottom sealing edge 130 and the bottom wall 112 into an integral structure. This provides support for the bottom wall 112, allowing it to flatten, resulting in a more uniform and smooth bottom wall 112 of the pouch battery. This not only improves the uniformity of the pouch battery, facilitating its installation and use, but also reduces the impact of the curved protrusions on the length of the pouch battery, thereby increasing the energy density of the pouch battery in this embodiment.

[0062] It should be noted that, referring to Figure 13 and Figure 14 In this embodiment, Figure 14 This is a schematic diagram illustrating interference between the side seal and the bottom seal, where the side seal 120 has a first notch 124. Therefore, interference between the side seal 120 and the bottom seal 130 can be avoided when both are folded towards the package body 110. On one hand, this reduces the risk of springback of the side seal 120 and the bottom seal 130, allowing the pouch battery to better maintain its shape and size; on the other hand, it reduces the size of the pouch battery, thereby increasing its energy density. Specifically, as... Figure 14 As shown, if the side seal 120 does not have the first notch 124, interference will occur between the side seal 120 and the bottom seal 130 when they are folded. To reduce the length or width of the soft-pack battery, the interference point between the side seal 120 and the bottom seal 130 needs to be folded, resulting in an interference portion 2000 of a three-layer sealing structure at the side seal 120 or the bottom seal 130. In this embodiment, the first notch 124 is provided at the side seal 120, so that the side seal 120 and the bottom seal 130 do not interfere with each other (e.g., Figure 13 As shown), without the need to form a three-layer sealing structure for the interference portion 2000, the length or width of the pouch battery is reduced, thereby increasing the energy density of the pouch battery.

[0063] Similarly, refer to Figure 15 , Figure 15This is a schematic diagram of the structure of a sixth type of soft-pack battery according to the first aspect of this utility model. In some embodiments, the side wall 111 near the top wall 113 also has a third clearance groove 117, which extends to the top wall 113. The side sealing edge 120 also includes a second extension 140, which extends to the third clearance groove 117. The soft-pack outer shell 100 also includes a top sealing edge 150, which is connected to the top wall 113 and the second extension 140. To avoid interference between the side sealing edge 120 and the top sealing edge 150 when folded, the corner where the top sealing edge 150 connects to the side sealing edge 120 has a second notch 160, the principle and function of which are similar to the first notch 124, and will not be described again here.

[0064] The second aspect of this utility model relates to an electrical device, such as an electronic device like a mobile phone, tablet, or watch, or a vehicle like a new energy electric vehicle or a hybrid electric vehicle. The electrical device includes the pouch battery of the first aspect embodiment. The pouch casing 100 of the pouch battery has a first clearance groove 114 on its exterior. The side sealing edge 120 includes a first extension 121 extending to the first clearance groove 114, thereby increasing the sealing width at the bottom corner of the pouch casing 100. Therefore, by cutting or folding the portion of the side sealing edge 120 protruding from the bottom wall 112, the first end face 122 of the side sealing edge 120 does not protrude from the bottom wall 112 of the encapsulated body, ensuring the sealing effect at the cut or folded points. Therefore, in this embodiment, by providing the first extension 121, the portion of the side seal 120 protruding from the encapsulation body 110 can be cut or folded without the soft-pack shell 100 leaking liquid, so that the first end face 122 of the side seal 120 does not protrude from the bottom wall 112 of the encapsulation body 110, thereby reducing the length of the soft-pack battery, increasing the energy density of the soft-pack battery, and thus improving the battery life of the electrical device.

[0065] It should be noted that since the electrical equipment in this embodiment adopts all the technical features of the first aspect embodiment, this embodiment has all the beneficial effects brought by the first aspect embodiment, which will not be repeated here.

[0066] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, in the description of the present invention, the reference to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A pouch battery, characterized by, The soft package battery has a set width and length, and comprises: a soft package shell including a packaging body and a side sealing edge, the packaging body having a receiving cavity, the packaging body including two side walls in a width direction of the soft package battery, and a bottom wall and a top wall in a length direction of the soft package battery, the side walls having a first clearance groove extending to the bottom wall, the side sealing edge including a first end face closer to the bottom wall in the length direction of the soft package battery, the side sealing edge being connected to the side walls, the side sealing edge including a first extension portion extending into the first clearance groove, the first end face not protruding from the bottom wall in a direction from the top wall to the bottom wall; a cell located in the receiving cavity; a tab connected to the cell and extending from the top wall.

2. The pouch battery of claim 1, wherein, The cell includes a second clearance groove, the soft package shell includes a recessed portion recessed toward the second clearance groove, a portion of the recessed portion being located in the second clearance groove, and the recessed portion having the first clearance groove. 3.The pouch battery of claim 1, wherein, The side sealing edge includes a second end face and a third end face opposite to each other in a width direction of the side sealing edge, the third end face being connected to the side wall, and a corner where the second end face and the first end face are connected having a first notch extending to the first extension portion.

4. The pouch battery of claim 3, wherein, The side sealing edge includes a first sealing edge portion and a second sealing edge portion, the second sealing edge portion being folded toward the first sealing edge portion to form the first notch and form a crease on the side sealing edge.

5. The pouch battery of claim 4, wherein, The side sealing edge includes an unsealed area and a sealed area distributed in a width direction of the side sealing edge, the unsealed area being connected between the packaging body and the sealed area, and a connection boundary being defined where the unsealed area and the sealed area are connected. An end portion of the crease located at the second end face is a first end point, and another end portion is a second end point, the second end point being spaced apart from the connection boundary in the width direction of the side sealing edge.

6. The pouch battery of claim 5, wherein, A distance between the second end point and the connection boundary in the width direction of the side sealing edge is L, and L≥1 mm. 7.The pouch battery of claim 4, wherein, An included angle between the crease and the second end face is defined as a, and 130°≤a≤140°. 8.The pouch battery of claim 4, wherein, The side sealing edge is folded toward the side wall, and the second sealing edge portion is located in the first clearance groove. 9.The pouch battery according to any one of claims 1 to 8, characterized by, The soft package shell further includes a bottom sealing edge connected to the bottom wall and connected to the first extension portion, the bottom sealing edge being folded toward the bottom wall and bonded to the bottom wall.

10. An electrical device, characterized by The soft package battery includes any one of claims 1 to 9.

Images