Soft package battery shell, soft package battery and electric equipment

Abstract

The utility model provides a soft package battery shell which comprises a shell body, the shell body is provided with a first plane, and the first plane is provided with a first area, a second area and a third area which are sequentially arranged in the linear direction; the second area is provided with at least two through holes for the tabs to penetrate out; the shell is configured to be foldable, so that the first area is attached to the third area, and a cavity used for containing the core package is formed. According to the technical scheme, the shell is provided with the through holes for the tabs to penetrate through, and the positions where the tabs penetrate through do not need to be sealed in the production process of the soft package battery, so that the volume of the soft package battery is reduced, and the utilization rate of the core package can be further improved.

Description

Technical Field

[0001] The present application relates to the technical field of soft-pack batteries, and in particular to a soft-pack battery housing, a soft-pack battery, and an electrical device. Background Art

[0002] The existing soft-pack battery structure includes a soft-pack battery shell and a core pack located within the shell. The core pack has tabs. The tabs are positioned between two opposing edges of the folded soft-pack battery shell. After the tabs are sandwiched between the two edges of the soft-pack battery shell, the tab glue applied to the tabs is heated to connect the tabs to the soft-pack battery shell, simultaneously completing the heat sealing of the side edge of the soft-pack battery where the tabs are located.

[0003] like Figure 1 As shown, the side of the soft-pack battery with the tab is the top seal 117, and the other edges of the soft-pack battery that need to be sealed are the side seals 118. During the top seal process, the tab needs to be placed between the two opposite edges of the top seal and the two opposite edges need to be sealed together. During the side seal process, the two opposite edges of the side seal need to be sealed together. After completing the top and side seal processes, the core pack is sealed inside the soft-pack battery shell.

[0004] like Figure 1 and Figure 2 As shown, after the two opposing edges of the side seals are sealed, the side seals 118 can be folded toward the main body of the soft-pack battery until they are in contact with the main body, thereby reducing the size of the soft-pack battery and improving the utilization of the core pack. However, due to the presence of the tabs, the two opposing edges of the top seal 117 cannot be folded, thus failing to further improve the utilization of the core pack. Utility Model Content

[0005] The purpose of this application is to provide a soft-pack battery shell, a soft-pack battery and an electrical device to improve the utilization rate of the core pack.

[0006] The embodiment of the present application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a soft-pack battery housing, comprising a shell having a first plane, the first plane having a first area, a second area, and a third area arranged in sequence along a straight line; the second area is provided with at least two through holes for the tabs to pass through; the shell is configured to be foldable so that the first area and the third area are fitted together to form a cavity for accommodating the core pack.

[0008] In the above technical solution, a through hole is provided on the shell for the tab to pass through. During the production process of the soft-pack battery, the position where the tab passes through is not the position where the soft-pack battery shell needs to be heat-sealed. The soft-pack battery shell provided by the above technical solution only has a side sealing position during the heat sealing process during the manufacturing process, and does not require a top seal, so as to reduce the volume of the soft-pack battery and thereby improve the utilization rate of the core pack.

[0009] In some optional embodiments, a flange extending away from the first plane is integrally formed circumferentially on the wall of the through hole, and the flange forms a channel for the tab to pass through. By providing a flange on the wall of the through hole, the flange can also play a certain role in supporting and protecting the tab, and the flange facilitates sealing with the tab glue on the tab.

[0010] In some optional embodiments, an extension plate is further included, one end of which is connected to the inner side of the flange, and the other end of which extends in a direction away from the first plane and extends out of the flange.

[0011] By providing an extension plate higher than the flange for connecting the flange, the connection area with the tab can be increased, making the tab connection more secure, thereby reducing the risk of cold soldering and leakage.

[0012] In some optional embodiments, the extension plates include two, the through hole has a first side and a second side opposite to each other, one end of the two extension plates is respectively connected to the flange of the first side and the flange of the second side, and an extension channel for the tab to pass through is formed between the two oppositely arranged extension plates.

[0013] In some optional embodiments, the extension plate is L-shaped, and the first section of the L-shaped extension plate is connected to the first plane, and the second section is connected to the flange and extends out after passing through the flange.

[0014] In the above technical solution, the first section is connected to the first plane, so that the connection between the extension plate and the shell is more reliable, and the possibility of the extension plate falling off is reduced.

[0015] In some optional embodiments, both surfaces of the extension plate include heat-sealing layers, the outer heat-sealing layer is heat-sealed with the shell, and the inner heat-sealing layer is used to heat-seal with the tab glue on the tab.

[0016] In some optional embodiments, the area on the outer side of the extension plate extending out from the flange is a nylon layer. The nylon layer can improve the wear resistance of the extension plate.

[0017] In some optional embodiments, the first region and / or the third region is formed with a pit recessed away from the first plane, and the first region is fitted with the third region, and the cavity is formed by the pit.

[0018] In a second aspect, an embodiment of the present application provides a soft-pack battery, comprising the soft-pack battery shell and core pack provided in the first aspect, the core pack having a positive electrode ear and a negative electrode ear, the first region and the third region being adhered and sealed to form the cavity, the core pack being arranged in the cavity, and the positive electrode ear and the negative electrode ear respectively extending from different through holes and being sealed at the through holes.

[0019] In some optional embodiments, the soft-pack battery has a length of 100 mm to 1000 mm, a width of 150 mm to 1550 mm, and a thickness of 8 mm to 26 mm.

[0020] In a third aspect, an embodiment of the present application provides an electrical device, including the soft-pack battery provided in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 Schematic diagram of the existing soft-pack battery structure after heat sealing;

[0023] Figure 2 for Figure 1 Schematic diagram of the soft-pack battery after folding;

[0024] Figure 3 A partial cross-sectional schematic diagram of a soft-pack battery provided in an embodiment of the present application;

[0025] Figure 4 A partial cross-sectional schematic diagram of a soft-pack battery housing provided in an embodiment of the present application;

[0026] Figure 5 A schematic diagram of a soft-pack battery housing in an unfolded state provided in an embodiment of the present application;

[0027] Figure 6 A schematic diagram of a folded soft-pack battery housing provided in an embodiment of the present application;

[0028] Figure 7 A schematic diagram of the layer structure of the housing provided in an embodiment of the present application;

[0029] Figure 8 Schematic diagram of the layer structure of the extension plate provided in an embodiment of the present application.

[0030] Icon: 100-soft pack battery shell; 110-shell; 111-first area; 1111-first pit; 112-second area; 1121-through hole; 113-third area; 1131-second pit; 114-flange; 115-cavity; 116-extension plate; 1161-aluminum layer; 1162-adhesive layer; 1163-heat sealing layer; 1164-nylon layer; 1165-first section; 1166-second section; 117-top sealing position; 118-side sealing position; 200-core package; 210-ear. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0034] In the description of this application, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0036] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0037] The inventors of this application have discovered that, due to the existing soft pack battery structure, Figure 1 As shown, it includes top sealing position 117 and side sealing position 118. Figure 1 The structure of the heat-sealed soft-pack battery after folding is as shown in FIG. Figure 2 As shown, since a pole ear is provided between the two opposite edges of the soft-pack battery shell at the top sealing position 117, due to the presence of the pole ear, after the two opposite edges of the top sealing position of the soft-pack battery shell are sealed and connected, the two opposite edges cannot be folded, that is, in the soft-pack battery, there are edges of the soft-pack battery shell that cannot be folded, so that the volume of the soft-pack battery cannot be further reduced, and the volume occupied by the core pack in the soft-pack battery shell cannot be further reduced, thereby hindering the further increase in the core pack utilization rate.

[0038] Based on this, the inventors of this application provide a soft pack battery, such as Figure 3 As shown, it includes a soft-pack battery shell 100 and a core pack 200 arranged inside the soft-pack battery shell 100, and the core pack 200 has a tab 210; wherein the tab 210 includes a positive tab and a negative tab, and the core pack 200 can be connected to an external circuit to form an electrical loop through the tab 210.

[0039] Further, if Figures 4 to 6 As shown, the soft pack battery housing 100 provided in the present application includes a foldable housing 110, the housing 110 has a first plane, and the first plane has a first area 111, a second area 112 and a third area 113 arranged in sequence along a straight line (ie, Figure 5The second region 112 is provided with at least two through-holes 1121 for the tabs 210 to pass through. The positive and negative tabs extend from different through-holes 1121 and are sealed at through-holes 1121 to prevent liquid leakage at the locations of through-holes 1121. The housing 110 can be folded to align the first region 111 with the third region 113. The folded housing 110 forms a cavity 115 for accommodating the core package 200.

[0040] That is, it is not difficult to understand that the soft-pack battery shell 100 provided in the present application is provided with a through hole 1121 for the tab 210 to pass through, and the tab 210 is not provided between the two opposite edges after the shell 110 is folded. Therefore, after the core pack 200 is provided in the cavity formed by the shell 110 and the opposite edges in the shell 110 are sealed and connected, any edge of the shell 110 that has been sealed and connected can be folded, which can better reduce the volume of the soft-pack battery, increase the volume share of the core pack 200, and thus improve the utilization rate of the core pack 200. It should be noted that in the relevant calculation of the utilization rate of the core pack 200, the volume of the soft-pack battery is calculated as the product of its maximum dimension in the length direction, the maximum dimension in the width direction, and the maximum dimension in the thickness direction. Therefore, by performing the folding process, the volume of the soft-pack battery can be reduced.

[0041] Furthermore, in some embodiments, the dimensions of the soft-pack battery are 100mm to 1000mm in length, 150mm to 1550mm in width, and 8mm to 26mm in thickness. These dimensions refer to the maximum dimensions in the length, width, and thickness directions after heat sealing and folding. Within the above-mentioned size range, the soft-pack battery structure provided in this application can effectively reduce the volume of the soft-pack battery after folding.

[0042] In the soft-pack battery shell 100 provided in the present application, the shell 110 can be folded so that the first area 111 and the third area 113 can be fitted together, that is, in the shell 110, the first area 111 and the third area 113 can be fitted together through surface contact, so as to facilitate sealing connection at the fitting position to seal the core package 200 in the cavity 115. In some embodiments of the present application, the edge of the shell 110 after being folded can be sealed and connected by the existing ear glue, or it can be connected by other adhesives with insulating properties. In some embodiments of the present application, the shell 110 can adopt the aluminum-plastic film commonly used in the prior art, that is, such as Figure 7 As shown, the shell 110 includes an aluminum layer 1161 located in the middle layer, and heat-sealing layers 1163 arranged on both sides of the aluminum layer 1161; after the shell 110 is folded, the two heat-sealing layers 1163 contact each other, and the shell 110 can be heat-sealed by heating.

[0043] Furthermore, in some embodiments of the present application, a flange 114 extending in a direction opposite to the first plane is integrally formed circumferentially on the wall of the through hole 1121, and the channel formed by the flange 114 is used for the tab 210 to pass through. It is not difficult to understand that the channel inside the through hole 1121 in the second region 112 is connected to the channel formed by the flange 114. Furthermore, the housing 110 also includes a second plane arranged opposite to the first plane, and the flange 114 arranged on the wall of the through hole 1121 is higher than the second plane. In this embodiment, by arranging the flange 114 on the wall of the through hole 1121, the flange 114 can also play a certain role in supporting and protecting the tab 210. Since the flange 114 is arranged along the circumference of the through hole 1121, the flange 114 and the tab 210 can also be connected by arranging tab glue or other adhesives to seal at the position of the through hole 1121. In addition, in the embodiment where the housing 110 is made of an aluminum-plastic film, heat sealing at the flange 114 can also achieve a sealed connection.

[0044] In some embodiments, the flange 114 and the shell 110 can be two separately manufactured structural parts, and the flange 114 and the shell 110 are fixedly connected by welding or hot melt connection. In other embodiments, the flange 114 and the shell 110 can also be integrally formed, that is, the flange 114 is a structure formed after the shell 110 is processed; for example, in one embodiment, a pit is formed in the second area 112 of the shell 110 by stamping, and then a through hole 1121 is cut out at the bottom of the pit by laser cutting. The portion of the pit that is not cut off forms an annular flange 114 formed along the wall of the through hole 1121 and extending away from the first direction. In other embodiments, the flange 114 can also be only arranged along the circumference of the through hole 1121 but not in a ring shape.

[0045] Further, if Figure 4 and Figure 6 As shown, in some embodiments of the soft pack battery housing 100 provided in the present application, an extension plate 116 is further included, and the extension plate 116 is arranged on the inner side of the flange 114, and one end of the extension plate 116 is connected to the flange 114, and the other end extends in a direction away from the first plane and extends out of the flange 114, that is, Figure 4One end of the extension plate 116 shown is higher than the top of the flange 114. One side of the extension plate 116 is in surface contact with and connected to the flange 114, and the other side is used to connect to the pole lug 210. The pole lug 210 passes through the channel surrounded by the through hole 1121 and the flange 114, that is, the extension direction of the pole lug 210 is the same as the extension direction of the extension plate 116. By providing an extension plate 116 that is higher than the flange 114 for connecting to the flange 114, the connection area with the pole lug 210 can be increased, making the pole lug 210 more firmly connected to reduce the risk of cold welding and leakage. In some embodiments, the pole lug 210 and the extension plate 116 are connected by providing a pole lug glue between the pole lug 210 and the extension plate 116. In other embodiments, the pole lug 210 and the extension plate 116 can also be connected in other ways.

[0046] It should not be difficult for those skilled in the art to understand that, in an embodiment in which the flange 114 and the shell 110 are integrally formed, the flange 114 is formed by stamping, and the size of the flange 114 is limited by the size of the through hole 1121, and the size of the through hole 1121 is limited by the thickness of the tab 210, and the tab 210 is relatively thin. Therefore, the height of the flange 114 (that is, the size perpendicular to the first direction is smaller) can be increased by providing an extension plate 116 to connect the tab 210, so that the tab 210 is bonded more firmly.

[0047] Furthermore, in some embodiments, two extension plates 116 are provided in the channel surrounded by the flange 114. The two extension plates 116 are arranged opposite to each other and are used to connect to the tab 210 from both sides. Figure 5 As shown, the through hole 1121 is elongated and has a first side and a second side opposite each other. One end of the two extension plates 116 is connected to the flange 114 corresponding to the first side and the flange 114 corresponding to the second side, respectively. An extension channel is formed between the two oppositely disposed extension plates 116 for the tab 210 to pass through. The tab 210 is disposed between the two extension plates 116 and can be sealed to the tab by tab glue. The tab 210 also has two opposing larger surfaces, one of which is disposed toward the first side of the through hole 1121 and the other is disposed toward the second side of the through hole 1121.

[0048] Further, in some embodiments, Figure 4 and Figure 8As shown, extension plate 116 is L-shaped, that is, extension plate 116 has a first section 1165 and a second section 1166 that are perpendicular to each other. First section 1165 of extension plate 116 is connected to the first plane of housing 110, while second section 1166 of extension plate 116 is connected to flange 114 and extends out from flange 114. In this embodiment, in addition to second section 1166 being connected to flange 114, extension plate 116 is also connected to the first plane via first section 1165, making the connection between extension plate 116 and housing 110 more secure and reducing the possibility of extension plate 116 falling off. Of course, in other embodiments, extension plate 116 can also be flat, with extension plate 116 only contacting the surface of flange 114. It should be readily understood by those skilled in the art that the width of the portion of the extension plate 116 for connection with the tab 210 should match the width of the tab 210 ; the width direction of the tab 210 is perpendicular to the direction in which the tab 210 extends out of the through hole 1121 .

[0049] In some embodiments of the present application, the extension plate 116 and the housing 110 may be made of the same material, for example, the housing 110 and the extension plate 116 are both aluminum-plastic films in the prior art, that is, Figure 8 As shown, the extension plate 116 includes an aluminum layer 1161 in the middle, adhesive layers 1162 disposed on both sides of the aluminum layer 1161, and a heat seal layer 1163 disposed on the side of the adhesive layer 1162 facing away from the aluminum layer 1161. Figure 8 It is not difficult to see that the inner and outer sides of the extension plate 116 are both provided with a heat-sealing layer 1163, wherein the inner side refers to the side facing the tab 210, and the outer side refers to the side facing the housing 110, and the outer side is opposite to the inner side. Accordingly, the extension plate 116 and the housing 110 can be sealed together by the heat-sealing layer 1163 on the inner and outer sides of the extension plate 116, and the extension plate 116 and the tab 210 can be sealed together by the heat-sealing layer 1163 in the extension plate 116. Of course, in other embodiments, the aluminum layer 1161 in the extension plate 116 can also be replaced with a structural member made of other materials. The process of achieving the heat-sealing connection can be achieved using an existing heat sealing machine.

[0050] Furthermore, in some embodiments of the present application, the extension plate 116 further includes a nylon layer 1164 located on one side of the aluminum layer 1161, such as Figure 8As shown, the outer side of the extension plate 116 is provided with both a heat-sealing layer 1163 and a nylon layer 1164. The side of the extension plate 116 provided with the nylon layer 1164 is disposed toward the flange 114, and the heat-sealing layer 1163 adjacent to the nylon layer 1164 is disposed toward the first plane. After the extension plate 116 is connected to the first plane of the housing 110, the area of ​​the extension plate 116 provided with the nylon layer 1164 is higher than the top of the flange 114. The provision of the nylon layer 1164 can improve the wear resistance of the extension plate 116. In other embodiments, a layer structure of another material can be used to replace the nylon layer 1164. In this embodiment, the entire nylon layer 1164 can be located above the top of the flange 114, or a portion of the nylon layer 1164 can be located below the top of the flange 114. The heat-sealing layer 1163 adjacent to the nylon layer 1164 can also be connected to the flange 114.

[0051] In some embodiments, at least one of the first region 111 and the third region 113 in the housing 110 is formed with a recessed cavity that is recessed away from the first plane. When the housing 110 is folded, the recess forms a cavity 115 for accommodating the core package 200. The first region 111 and the third region 113 are in contact and sealed to prevent liquid in the cavity 115 from leaking from the connection between the first and third regions 111, 113. Specifically, in one embodiment, a first recess 1111 may be provided in the first region 111, and a second recess 1131 may be provided in the third region 113. When the housing 110 is folded, the first and second recesses 1111, 1131 align and enclose the cavity 115 for accommodating the core package 200. In another embodiment, a first recess 1111 may be provided in the first region 111. When the housing 110 is folded, the first recess 1111 and the third region 113 in the first plane enclose the cavity 115.

[0052] Furthermore, the present application also provides an electrical device, including the soft-pack battery provided in the above-mentioned embodiment of the present application. The electrical device includes electronic products such as computers, transportation vehicles such as electric vehicles, and energy storage equipment in the power generation field.

[0053] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A soft pack battery shell, characterized in that: The housing comprises a first plane having a first area, a second area and a third area arranged in sequence along a straight line; the second area is provided with at least two through holes for the tabs to pass through; The shell is configured to be foldable so that the first area fits into the third area and forms a cavity for accommodating the core package; a flange extending in the direction away from the first plane is integrally formed circumferentially on the wall of the through hole, and the channel formed by the flange is used for the tab to pass through; it also includes an extension plate, one end of the extension plate is connected to the inner side of the flange, and the other end extends in a direction away from the first plane and extends out of the flange; one side of the extension plate is in contact with and connected to the flange surface, and the other side is used to connect to the tab.

2. The soft pack battery housing according to claim 1, wherein: The extension plates include two, the through hole has a first side and a second side opposite to each other, one end of the two extension plates are respectively connected to the flange of the first side and the flange of the second side, and an extension channel for the tab to pass through is formed between the two oppositely arranged extension plates.

3. The soft pack battery housing according to claim 2, characterized in that: The extension plate is L-shaped, and the first section of the L-shaped extension plate is connected to the first plane, and the second section is connected to the flange and extends out after passing through the flange.

4. The soft pack battery housing according to claim 1, wherein: Both sides of the extension plate include heat-sealing layers. The outer heat-sealing layer is heat-sealed with the shell, and the inner heat-sealing layer is used for heat-sealing with the tab glue on the tab.

5. The soft pack battery housing according to claim 4, characterized in that: The area on the outer side of the extension plate that extends out of the flange is a nylon layer.

6. The soft pack battery housing according to any one of claims 1 to 5, characterized in that: The first region and / or the third region is formed with a pit recessed away from the first plane. The first region is fitted with the third region, and the cavity is formed by the pit.

7. A soft pack battery, characterized in that: It comprises the soft-pack battery shell and core pack according to any one of claims 1 to 6, the core pack having a positive electrode ear and a negative electrode ear, the first region and the third region are adhered and sealed to form the cavity, the core pack is arranged in the cavity, and the positive electrode ear and the negative electrode ear respectively extend from different through holes and are sealed at the through holes.

8. The soft pack battery according to claim 7, characterized in that: The soft-pack battery has a length of 100 mm to 1000 mm, a width of 150 mm to 1550 mm, and a thickness of 8 mm to 26 mm.

9. An electrical device, characterized in that: Including the soft pack battery according to claim 7 or 8.

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