Pouch cell

Abstract

The application provides a soft package battery, which comprises a fireproof frame, a soft package battery core, a fireproof foil and a filling member. The fireproof frame is formed with a communicating accommodating cavity and a naked port. The soft package battery core is arranged in the accommodating cavity. The fireproof foil is wrapped on the outer peripheral wall of the fireproof frame to seal the naked port. The soft package battery core, the fireproof foil and the inner wall of the fireproof frame jointly form a filling cavity. The filling member is located in the filling cavity and is fixedly connected with the fireproof frame and the soft package battery core. The soft package battery is reliably assembled, the outer side of the soft package battery core is arranged through the fireproof shell composed of the fireproof frame and the fireproof foil, and the assembled soft package battery has an independent fireproof design.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a pouch battery. Background Technology

[0002] With the rapid development of consumer electronics, more and more consumer electronics products are replacing the built-in batteries in their original integrated structures with removable batteries, especially pouch digital batteries. Under this trend, the product attributes of batteries have undergone a fundamental change, from being components attached to electronic products to becoming independent finished batteries that can be circulated and sold separately. Correspondingly, their product certification standards and compliance requirements also need to be adjusted accordingly.

[0003] Currently, mainstream small pouch digital batteries are mostly supplied in the form of modules, which include battery cells, thickness compensation pads, and casings. Due to cost control considerations, these batteries do not have fire-resistant structures designed into the battery body itself; their fire resistance relies entirely on the casing of the consumer electronics products in which they are mounted.

[0004] However, the small size of pouch batteries, especially pouch digital batteries, and the limited internal space make fire-resistant designs for pouch batteries lacking. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a soft-pack battery with a fire-resistant design.

[0006] The objective of this invention is achieved through the following technical solution: A pouch battery, comprising: The fireproof frame has interconnected receiving cavities and exposed openings; The soft-pack battery cell is disposed within the accommodating cavity; Fire-resistant foil is wrapped around the outer peripheral wall of the fireproof frame to seal the exposed opening; the soft-pack battery cell, the fire-resistant foil, and the inner wall of the fireproof frame together form a filling cavity; A filler is located in the filler cavity, and the filler is fixedly connected to the fireproof frame and the soft-pack battery cell respectively.

[0007] In one embodiment, the fireproof frame is a fireproof plastic frame.

[0008] In one embodiment, the fire-resistant foil is fire-resistant aluminum foil or fire-resistant steel foil.

[0009] In one embodiment, the pouch battery further includes a double-sided adhesive material, one side of which is bonded to the portion of the pouch cell corresponding to the exposed opening, and the other side of which is bonded to the fire-retardant foil.

[0010] In one embodiment, there are two exposed openings, which are located on both sides of the fireproof frame; there are also two double-sided adhesive materials, which are respectively bonded to the parts of the soft-pack battery cell corresponding to the two exposed openings.

[0011] In one embodiment, the starting end and the ending end of the fire-retardant foil are both adhered to one of the double-sided adhesive materials, and the starting end and the ending end of the fire-retardant foil are aligned and abutted against each other.

[0012] In one embodiment, the fireproof frame is a PC fireproof frame or an ABS fireproof frame.

[0013] In one embodiment, the fireproof frame is further formed with a glue-applying hole, the glue-filling cavity is connected to the glue-applying hole, and the glue-filling component is filled by the glue-applying hole and formed in the glue-filling cavity through a glue-pouring process.

[0014] In one embodiment, the pouch battery further includes a flame-retardant label that at least covers the outer wall of the fire-retardant foil.

[0015] In one embodiment, the fireproof frame also has a glue-applying hole, the glue-filling cavity is connected to the glue-applying hole, and the glue-filling component is filled by the glue-applying hole and formed in the glue-filling cavity through a glue-pouring process; the flame-retardant label is also covered by the glue-applying hole.

[0016] Compared with the prior art, the present invention has at least the following advantages: The aforementioned pouch battery, because the pouch cell is located in the accommodating cavity, and the pouch cell, fireproof foil and the inner wall of the fireproof frame together form a filling cavity, the filling component is located in the filling cavity, and the filling component is fixedly connected to the fireproof frame and the pouch cell respectively, so that the pouch battery can be reliably assembled. At the same time, the outer side of the pouch cell is covered by a fireproof shell composed of a fireproof frame and fireproof foil, so that the assembled pouch battery has an independent fireproof design. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a pouch cell according to one embodiment; Figure 2 for Figure 1The diagram shows the opening of the flame-retardant label and fire-resistant foil of the pouch battery. Figure 3 for Figure 2 The exploded view of the pouch cell shown. Figure 4 for Figure 2 A schematic diagram of the fireproof frame for the pouch battery shown. Figure 5 for Figure 1 A cross-sectional schematic diagram of the pouch cell shown. Figure 6 for Figure 5 An enlarged schematic diagram of the pouch battery shown; Figure 7 for Figure 1 A partial structural schematic diagram of the pouch battery shown. Figure 8 for Figure 1 Another partial structural diagram of the pouch battery is shown. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] This application provides a pouch battery, including a fireproof frame, a pouch cell, a fireproof foil, and a filler. The fireproof frame has a communicating cavity and an exposed opening. The pouch cell is disposed in the cavity. The fireproof foil covers the outer peripheral wall of the fireproof frame to seal the exposed opening. The pouch cell, the fireproof foil, and the inner wall of the fireproof frame together form a filler cavity. The filler is located in the filler cavity and is fixedly connected to the fireproof frame and the pouch cell.

[0023] The aforementioned pouch battery, because the pouch cell is located in the accommodating cavity, and the pouch cell, fireproof foil and the inner wall of the fireproof frame together form a filling cavity, the filling component is located in the filling cavity, and the filling component is fixedly connected to the fireproof frame and the pouch cell respectively, so that the pouch battery can be reliably assembled. At the same time, the outer side of the pouch cell is covered by a fireproof shell composed of a fireproof frame and fireproof foil, so that the assembled pouch battery has an independent fireproof design.

[0024] To better understand the technical solution and beneficial effects of this application, the following detailed description is provided in conjunction with specific embodiments: like Figures 1 to 4 As shown, a pouch battery 10 of one embodiment includes a fireproof frame 100, a pouch cell 200, a fireproof foil 300, and a filler 400. The fireproof frame 100 has a communicating cavity 102 and an exposed opening 104; that is, the fireproof frame 100 has a cavity 102 inside, and at least one side of the fireproof frame 100 has an exposed opening 104 communicating with the cavity 102.

[0025] The soft-pack battery cell 200 is disposed within the receiving cavity 102. Fire-retardant foil 300 covers the outer peripheral wall of the fireproof frame 100 to seal the exposed opening 104; see also... Figure 5 and Figure 6 The soft-pack battery cell 200, the fireproof foil 300, and the inner wall of the fireproof frame 100 together form a filling cavity 202. That is, the outer wall of the soft-pack battery cell 200, the inner wall of the fireproof frame 100, and the fireproof foil 300 together form the filling cavity 202. The filling component 400 is located in the filling cavity 202, and the filling component 400 is fixedly connected to the fireproof frame 100 and the soft-pack battery cell 200 respectively, so that the soft-pack battery cell 200 is firmly connected to the fireproof frame 100 through the filling component 400. In addition, the fireproof foil 300 covers the outer peripheral wall of the fireproof frame 100 and seals the exposed opening 104, so that the fireproof foil 300 covers the filling component 400 located at the exposed opening 104 at the same time as covering the fireproof frame 100.

[0026] The aforementioned soft-pack battery 10, since the soft-pack cell 200 is disposed in the accommodating cavity 102, and the soft-pack cell 200, the fireproof foil 300 and the inner wall of the fireproof frame 100 together form a filling cavity 202, the filling component 400 is located in the filling cavity 202, and the filling component 400 is fixedly connected to the fireproof frame 100 and the soft-pack cell 200 respectively, so that the soft-pack battery 10 can be reliably assembled. At the same time, the outer side of the soft-pack cell 200 is covered by a fireproof shell composed of the fireproof frame 100 and the fireproof foil 300, so that the assembled soft-pack battery 10 has an independent fireproof design.

[0027] Furthermore, by using a fireproof frame 100 and fireproof foil 300, the fire resistance of the soft-pack battery 10 in six directions is achieved. Under the premise of limited internal space and strict cost constraints of small finished batteries, this fills the technical gap in the fire safety performance of detachable soft-pack batteries 10.

[0028] It should be noted that the number of exposed openings 104 can be one or two. In this embodiment, there are two exposed openings 104, which are located on opposite sides of the fireproof frame 100. In other embodiments, the number of exposed openings 104 can be one.

[0029] In one embodiment, the fireproof frame 100 is a fireproof plastic frame, giving it good fire resistance. In this embodiment, the fireproof frame 100 is a fireproof plastic frame.

[0030] In one embodiment, the fireproof frame 100 is a PC fireproof frame or an ABS fireproof frame, giving the fireproof frame 100 good fire resistance. In other embodiments, the fireproof frame 100 may also be a PC / ABS composite fireproof frame or a ceramic matrix composite fireproof frame.

[0031] In one embodiment, the fire-retardant foil 300 is fire-retardant aluminum foil or fire-retardant steel foil, giving the fire-retardant foil 300 fire-retardant properties. In this embodiment, the fire-retardant foil 300 is fire-retardant aluminum foil.

[0032] like Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, in one embodiment, the pouch battery 10 further includes a double-sided adhesive material 500. One side of the double-sided adhesive material 500 is bonded to the portion of the pouch cell 200 corresponding to the exposed opening 104, and the other side of the double-sided adhesive material 500 is bonded to the fireproof foil 300, so that the fireproof foil 300 is bonded and fixed to the double-sided adhesive material 500 at the exposed opening 104.

[0033] like Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, in one embodiment, there are two exposed openings 104, which are located on both sides of the fireproof frame 100; there are also two double-sided adhesive materials 500, which are respectively bonded to the parts of the flexible battery cell 200 corresponding to the two exposed openings 104, so that the fireproof foil 300 can be bonded to the parts of the flexible battery cell 200 corresponding to the two exposed openings 104 through the two double-sided adhesive materials 500.

[0034] like Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, in one embodiment, both the starting end and the ending end of the fire-retardant foil 300 are adhered to one of the double-sided adhesive materials 500, and the starting end and the ending end of the fire-retardant foil 300 are aligned and abutted against each other, so that the fire-retardant foil 300 reliably covers the outer peripheral wall of the fireproof frame 100. In this embodiment, the starting end and the ending end of the fire-retardant foil 300 are aligned, and the starting end and the ending end of the fire-retardant foil 300 are placed close together, so that the gap between the starting end and the ending end of the fire-retardant foil 300 is small.

[0035] like Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, further, the side of the double-sided adhesive material 500 facing away from the flexible battery cell 200 is flush with the surface of the fireproof frame, that is, the side of the double-sided adhesive material 500 facing away from the flexible battery cell 200 and the surface of the fireproof frame with the exposed opening 104 are on the same plane, so that the fireproof foil 300 is more smoothly bonded to the double-sided adhesive material 500 corresponding to the exposed opening 104, avoiding the fireproof foil 300 from being recessed inward at the exposed opening 104, and making the fireproof foil 300 cover the outside of the fireproof frame 100 more smoothly.

[0036] Furthermore, the double-sided adhesive material 500 is a fire-retardant material, giving the pouch cell 200 a fire-resistant outer shell composed of the double-sided adhesive material 500 and the fire-retardant foil 300 at the exposed opening 104, thus improving the fire-retardant effect of the pouch cell 200 at the exposed opening 104. Specifically, the double-sided adhesive material 500 is a halogen-free flame-retardant acrylic foam tape, a glass fiber reinforced flame-retardant PET double-sided tape, a high-temperature resistant silicone backing flame-retardant double-sided adhesive, or an ultra-thin flame-retardant acrylic film, giving the double-sided adhesive material 500 a good fire-retardant effect, enabling the pouch cell 200 to better meet the QOQW2 flame-retardant certification requirements, and allowing the double-sided adhesive material 500 to effectively bond and fix the fire-retardant foil 300; moreover, the double-sided adhesive material 500 replaces the gasket of the pouch battery 10, reducing the flammable materials inside the pouch battery 10.

[0037] like Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, the side surface of the pouch cell 200 further includes two planar areas 203 and two curved areas 205. The two planar areas are arranged parallel to each other, and the two ends of one planar area are respectively connected to the two ends of the other planar area through the two curved areas. In this embodiment, the two planar areas are respectively arranged corresponding to the two exposed openings 104; there are two double-sided adhesive materials 500, and one side of each double-sided adhesive material 500 is bonded to the corresponding planar area, so that each double-sided adhesive material 500 is bonded to the pouch cell 200 relatively flat, thereby making the fireproof foil 300 relatively flat at the exposed opening 104. Furthermore, each double-sided adhesive material 500 at least completely covers the planar area, so that each double-sided adhesive material 500 is well bonded to the pouch cell 200.

[0038] It is understood that in other embodiments, the number of exposed openings 104 may also be one, with one planar area corresponding to the exposed opening 104, one side of the double-sided adhesive 500 being bonded to the planar area corresponding to the exposed opening 104, and the other side of the double-sided adhesive 500 being flush with the surface of the fireproof frame.

[0039] Furthermore, the double-sided adhesive material 500 completely covers the projected outline of the exposed opening 104 on the flexible battery cell 200, ensuring that the portion of the flexible battery cell 200 corresponding to the exposed opening 104 is completely covered by the double-sided adhesive material 500, further improving the fire-retardant effect of the flexible battery cell 200. In this embodiment, the periphery of the double-sided adhesive material 500 extends to abut against the inner wall of the exposed opening 104.

[0040] It is understood that in other embodiments, the double-sided adhesive 500 is not limited to being bonded to the part of the soft-pack battery cell 200 corresponding to the exposed opening 104, but can also be bonded to the outer wall of the fireproof frame.

[0041] Furthermore, the filler 400 is a silicone filler or a PA66 filler, which gives the filler 400 better fire resistance. In this embodiment, the filler 400 is a PA66 filler.

[0042] like Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, in one embodiment, the fireproof frame 100 is further formed with a glue-applying hole 106. The glue-filling cavity 202 is connected to the glue-applying hole 106. The glue-filling component 400 is filled by the glue-applying hole 106 and formed in the glue-filling cavity 202 through a glue-pouring process, so that the glue-filling component 400 is well formed in the glue-filling cavity 202, and the glue-filling component 400 is reliably fixedly connected to the fireproof frame 100 and the soft-pack battery cell 200 respectively.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, in one embodiment, the pouch battery 10 also includes a flame-retardant label 600, which at least covers the outer wall of the fire-retardant foil 300, further improving the fire resistance of the pouch battery 10.

[0044] like Figure 1 , Figures 2 to 4 , Figure 7 As shown, in one embodiment, the fireproof frame 100 also has a glue-applying hole 106, the glue-filling cavity 202 is connected to the glue-applying hole 106, and the glue-filling component 400 is filled by the glue-applying hole 106 and formed in the glue-filling cavity 202 by a glue-pouring process; the flame-retardant label 600 is also covered by the glue-applying hole 106.

[0045] In this embodiment, the flame-retardant label 600 is a flame-retardant and high-temperature resistant label. Through a multi-layered, synergistic protective design comprising the fireproof frame 100, fireproof foil 300, filler 400, and flame-retardant and high-temperature resistant label, a high fire resistance rating is effectively achieved despite the limited internal space and strict cost constraints of small finished batteries. Furthermore, the integrated assembly of the fireproof frame 100, fireproof foil 300, filler 400, and flame-retardant and high-temperature resistant label provides anti-disassembly protection, further ensuring the safety and integrity of the soft-pack battery 10. Specifically, the flame-retardant label 600 includes a flame-retardant PET substrate layer and an acrylic adhesive layer formed on the flame-retardant PET substrate layer, giving the flame-retardant label 600 excellent fire-retardant properties.

[0046] like Figures 1 to 8 As shown, in one embodiment, the assembly method of the pouch battery 10 includes some or all of the following steps: First, the soft-pack battery cell 200 is assembled, that is, the battery cell is connected to the PCB board by laser spot welding; Then, the soft-pack battery cell 200 is placed inside the fireproof frame 100, which is made of flame-retardant and fireproof material to reserve necessary space for the volume expansion of the battery cell during operation. Next, double-sided adhesive 500 is applied to both sides of the soft-pack battery cell 200; Subsequently, the exposed area 104 of the flexible battery cell 200 outside the fireproof frame 100 is covered by fire-retardant foil 300. The double-sided adhesive 500 on both sides meets the QOQW2 flame retardant certification requirements, giving the double-sided adhesive 500 excellent bonding strength and flame retardant properties, ensuring reliable bonding and fixation between the fire-retardant foil 300, the flexible battery cell 200, and the fireproof frame 100. The fireproof frame 100 has interconnected glue-filling cavities 202 and glue-applying holes 106, which are offset from the fire-retardant foil 300.

[0047] Then, through the glue injection hole 106, the glue filling cavity 202, i.e. the inside of the battery, is filled with injection molding compound to form a filler 400 in the glue filling cavity 202, thereby improving the structural strength and integrity of the soft pack battery 10. Finally, the flame-retardant label 600 is completely wrapped around the fire-retardant foil 300, forming the outermost fire barrier of the soft-pack battery 10, further enhancing the overall fire safety performance of the soft-pack battery 10. The flame-retardant label 600 is made of flame-retardant and high-temperature resistant material. Specifically, the flame-retardant label 600 includes a flame-retardant PET substrate layer and an acrylic adhesive layer molded onto the flame-retardant PET substrate layer, giving the flame-retardant label 600 good fire-retardant effect.

[0048] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A soft-pack battery (10), characterized in that, include: The fireproof frame (100) has a connected receiving cavity (102) and an exposed opening (104). A soft-pack battery cell (200) is disposed within the accommodating cavity (102); Fireproof foil (300) is wrapped around the outer peripheral wall of the fireproof frame (100) to seal the exposed opening (104); the soft-pack battery cell (200), the fireproof foil (300) and the inner wall of the fireproof frame (100) together form a filling cavity (202). A filler (400) is located in the filler cavity (202), and the filler (400) is fixedly connected to the fireproof frame (100) and the soft-pack battery cell (200) respectively.

2. The soft-pack battery (10) according to claim 1, characterized in that, The fireproof frame (100) is a fireproof plastic frame.

3. The soft-pack battery (10) according to claim 1, characterized in that, The fireproof foil (300) is fireproof aluminum foil or fireproof steel foil.

4. The soft-pack battery (10) according to claim 1, characterized in that, It also includes a double-sided adhesive material (500), one side of which is bonded to the part of the soft-pack battery cell (200) corresponding to the exposed opening (104), and the other side of which is bonded to the fireproof foil (300).

5. The soft-pack battery (10) according to claim 4, characterized in that, There are two exposed openings (104), and the two exposed openings (104) are located on both sides of the fireproof frame (100); there are two double-sided adhesive materials (500), and the two double-sided adhesive materials (500) are respectively bonded to the soft-pack battery cell (200) at the positions corresponding to the two exposed openings (104).

6. The soft-pack battery (10) according to claim 5, characterized in that, The starting end and the ending end of the fireproof foil (300) are both bonded to one of the double-sided adhesive materials (500), and the starting end and the ending end of the fireproof foil (300) are aligned and abutted against each other.

7. The soft-pack battery (10) according to claim 1, characterized in that, The fireproof frame (100) is made of either PC fireproof frame or ABS fireproof frame.

8. The soft-pack battery (10) according to claim 1, characterized in that, The fireproof frame (100) also has a glue-applying hole (106), the glue-filling cavity (202) is connected to the glue-applying hole (106), and the glue-filling component (400) is filled by the glue-applying hole (106) and formed in the glue-filling cavity (202) through the glue-pouring process.

9. The soft-pack battery (10) according to claim 1, characterized in that, It also includes a flame-retardant label (600), which at least covers the outer wall of the fireproof foil (300).

10. The soft-pack battery (10) according to claim 9, characterized in that, The fireproof frame (100) also has a glue-applying hole (106), the glue-filling cavity (202) is connected to the glue-applying hole (106), and the glue-filling component (400) is filled by the glue-applying hole (106) and formed in the glue-filling cavity (202) through the glue-pouring process; the flame-retardant label (600) is also covered by the glue-applying hole (106).

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