Anti-inflation soft package battery

Abstract

The utility model discloses an anti-inflation soft package battery, which relates to the technical field of soft package batteries and comprises a battery cell, and an adsorption film is arranged on the outer wall surface of the battery cell. The aluminum plastic film in the sealed state is coated on the outer side of the battery cell; the exhaust device comprises an exhaust shell, and an adsorption filler is arranged in the exhaust shell; the exhaust valve is positioned on the first exhaust hole and the second exhaust hole; when the battery cell of the soft package battery generates gas, part of the gas of the film is adsorbed, so that a bump is prevented from being directly formed, and a buffering effect is achieved; when the internal air pressure of the battery exceeds the set value, the gas in the battery can penetrate through the exhaust valve and enter the exhaust shell of the exhaust device, the adsorption filler filled in the exhaust shell can adsorb the gas, and when the internal air pressure of the battery is continuously increased, the gas can be exhausted out of the aluminum plastic film through the second exhaust hole, so that the normal form of the soft package battery is kept; and the soft package battery is prevented from being inflated to bulge the battery or the corresponding electric equipment is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of soft-pack batteries, in particular to an anti-flatulence soft-pack battery. Background Art

[0002] Pouch cells are widely used in electronic products. Lithium-ion secondary batteries, in particular, often bulge during use. This is caused by internal gas generation, which compresses and expands the sealed aluminum-plastic film. This bulging can endanger the safety of electronic and electrical equipment, potentially damaging the battery or the associated electrical devices.

[0003] The reason for gas production in lithium-ion soft-pack batteries is the residual moisture inside the battery during the production process and the gas produced by the decomposition of the electrolyte during the battery charging and discharging process. The types of gas are mainly water, carbon dioxide, ethylene, carbon monoxide, etc. Therefore, it is necessary to adopt new technologies to solve the bulging problem of soft-pack batteries in a targeted manner. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides an anti-bloating soft-pack battery.

[0005] According to the embodiment of the utility model, the anti-flatulence soft-pack battery includes: a battery cell, an adsorption film is provided on the outer wall surface of the battery cell, and the adsorption film can adsorb the gas generated by the battery cell; an aluminum-plastic film, which is covered on the outer side of the battery cell in the sealed state, and the aluminum-plastic film has a seal; an exhaust device is located on the seal of the aluminum-plastic film, the exhaust device includes an exhaust shell, the exhaust shell has an inner cavity, an adsorption filler is provided in the exhaust shell, and a first exhaust hole and a second exhaust hole are provided on the exhaust shell, and the gas generated by the battery cell can pass through the first exhaust hole, the inner cavity of the exhaust shell and the second exhaust hole in sequence and then be discharged outside the aluminum-plastic film; an exhaust valve is located on the first exhaust hole and the second exhaust hole.

[0006] According to some embodiments of the present invention, the battery core includes a plurality of electric chips and a diaphragm, adjacent electric chips are separated by the diaphragm, and the adsorption film is fixedly connected to the diaphragm.

[0007] According to some embodiments of the present invention, adsorption material particles are distributed on the adsorption membrane.

[0008] According to some embodiments of the present invention, tabs are provided at the upper end and / or lower end of the battery cell, the tabs extend out of the aluminum-plastic film, and the seal is located on the side of the aluminum-plastic film.

[0009] According to some embodiments of the present invention, the aluminum-plastic film before the sealing state includes a mounting portion and a packaging portion, the packaging portion is located on both sides of the mounting portion, a pit is provided on the mounting portion, the battery cell and the exhaust device are located on the pit, the pit corresponds to the position of the exhaust device as a seal, there is a side sealing edge between the packaging portion and the mounting portion, and the outer edge of the aluminum-plastic film has an air bag sealing edge.

[0010] According to some embodiments of the present invention, the outer side wall of the exhaust casing and the sealing opening are sealed by a sealant.

[0011] According to some embodiments of the present invention, the sealant is a sealing membrane covering the exhaust housing.

[0012] According to some embodiments of the present invention, a porous isolation plate is provided in the exhaust shell, and the porous isolation plate divides the inner cavity of the exhaust shell into at least two layers of exhaust chambers. The adsorption filler is located in the exhaust chambers, and the gas entering the inner cavity of the exhaust shell from the first exhaust hole passes through each of the exhaust chambers in turn and is discharged from the exhaust shell from the second exhaust hole.

[0013] According to some embodiments of the present invention, the exhaust shell has a first surface and a second surface, a plurality of the first exhaust holes are distributed on the first surface from top to bottom, and a plurality of the second exhaust holes are distributed on the second surface from top to bottom.

[0014] According to some embodiments of the present invention, the exhaust valve includes a fixed net and an exhaust membrane, and the exhaust membrane covers or overlaps the fixed net.

[0015] The anti-bloating soft-pack battery according to the embodiment of the present invention has at least the following technical effects: when the battery cell of the soft-pack battery generates gas, the adsorption film absorbs part of the gas to avoid direct formation of bulges and play a buffering role; when the internal air pressure of the battery exceeds the set value, the gas in the battery can pass through the exhaust valve and enter the exhaust shell of the exhaust device. The adsorption filler filled in the exhaust shell can adsorb the gas. When the internal air pressure of the battery continues to increase, the gas can be discharged from the aluminum-plastic film through the second exhaust hole, thereby maintaining the normal shape of the soft-pack battery and preventing the soft-pack battery from being bloated and damaged by the battery or corresponding electrical equipment.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a three-dimensional diagram of the utility model's anti-flatulence soft-pack battery in a sealed state;

[0019] Figure 2 It is a three-dimensional diagram of the exhaust device in the utility model;

[0020] Figure 3 It is a cross-sectional view of the exhaust device in the utility model;

[0021] Figure 4 This is a working diagram of the utility model's anti-flatulence soft-pack battery;

[0022] Figure 5 This is a schematic diagram of the structure of the utility model's anti-flatulence soft-pack battery before sealing;

[0023] Figure 6 This is an exploded view of the exhaust valve in the present invention;

[0024] Figure 7 It is a schematic diagram of the preparation of the battery cell in the utility model.

[0025] Reference numerals:

[0026] Battery cell 100, battery chip 110, diaphragm 120, tab 130;

[0027] Adsorption film 200, adsorption material particles 210, adhesive tape 220;

[0028] Aluminum-plastic film 300, mounting portion 310, punching hole 311, sealing 312, first hole position 313, second hole position 314, packaging portion 320, side sealing edge 330, air bag sealing edge 340;

[0029] Exhaust device 400, exhaust housing 410, first surface 411, first exhaust hole 412, second surface 413, second exhaust hole 414, exhaust chamber 415, adsorption filler 420, sealant 430, covering portion 431, protruding portion 432, porous isolation plate 440;

[0030] Exhaust valve 500 , fixed net 510 , mesh 511 , net outer ring 512 , exhaust membrane 520 . DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0033] In the description of this utility model, "a plurality" means more than two, and "greater than," "less than," "exceed," etc. are understood to exclude the number itself. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number or order of the technical features indicated.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] Reference below Figure 1 and Figure 2 The invention describes an anti-bloating soft-pack battery according to an embodiment of the invention.

[0036] like Figure 1 and Figure 2 As shown, the anti-bloating soft-pack battery according to an embodiment of the present invention includes a battery cell 100, an aluminum-plastic film 300, an exhaust device 400 and an exhaust valve 500.

[0037] The outer wall of the battery cell 100 is provided with an adsorption film 200, which can adsorb the gas generated by the battery cell 100; the aluminum-plastic film 300 is wrapped around the outer side of the battery cell 100 in the sealed state, and the aluminum-plastic film 300 has a sealing 312; Figure 2 、 Figure 3 The exhaust device 400 is located on the sealing portion 312 of the aluminum-plastic film 300. The exhaust device 400 includes an exhaust shell 410. The exhaust shell 410 has an inner cavity. An adsorption filler 420 is provided in the exhaust shell 410. A first exhaust hole 412 and a second exhaust hole 414 are provided on the exhaust shell 410. The gas generated by the battery cell 100 can pass through the first exhaust hole 412, the inner cavity of the exhaust shell 410 and the second exhaust hole 414 in sequence and then be discharged outside the aluminum-plastic film 300. The exhaust valve 500 is located on the first exhaust hole 412 and the second exhaust hole 414.

[0038] For example, Figure 1 and Figure 2As shown, the adsorption film 200 on the outer wall of the battery cell 100 can adsorb the gas generated by the battery cell 100. The aluminum-plastic film 300 is wrapped around the outer side of the battery cell 100 in the sealed state. The aluminum-plastic film 300 has a seal 312 to ensure that a relatively closed space is formed in the aluminum-plastic film 300 to encapsulate the battery cell 100. Figure 2 、 Figure 3 The exhaust device 400 is located on the seal 312 of the aluminum-plastic film 300. The exhaust device 400 includes an exhaust housing 410, which has an inner cavity. An adsorbent filler 420 is disposed within the exhaust housing 410. The exhaust housing 410 is provided with a first exhaust hole 412 and a second exhaust hole 414. Gas generated by the battery cell 100 can sequentially pass through the first exhaust hole 412, the inner cavity of the exhaust housing 410, and the second exhaust hole 414 before being discharged from the aluminum-plastic film 300, serving as an exhaust channel for the exhaust device 400 and even the soft-pack battery of the present invention. An exhaust valve 500 is located above the first exhaust hole 412 and the second exhaust hole 414. If the air pressure within the soft-pack battery of the present invention becomes excessive, air can flow through the exhaust valve 500.

[0039] In actual work, refer to Figure 3 、 Figure 4 Once the battery cells 100 within the soft-pack battery of the present invention generate gas, the adsorption film can absorb at least some of the gas generated by the battery cells 100, preventing the gas generated by the battery cells 100 from directly causing local bulging of the soft-pack battery of the present invention, thereby providing a certain buffering effect. When the internal pressure of the battery exceeds the set value, the gas within the battery can pass through the exhaust valve 500. That is, the gas continuously generated by the battery cells 100 can enter the exhaust shell 410 of the exhaust device 400 through the first exhaust hole 412. The adsorbent filler 420 filled in the exhaust shell 410 can absorb the gas. As the internal pressure of the battery continues to increase, the gas within the battery can pass through the exhaust valve 500 on the second exhaust hole 414 and be discharged outside the aluminum-plastic film 300 through the second exhaust hole 414, maintaining the normal shape of the soft-pack battery and preventing the soft-pack battery from bulging and damaging the battery or the corresponding electrical equipment.

[0040] In addition, the adsorption filler 420 in the exhaust device 400 can also prevent some of the external gas of the battery from entering the interior of the battery, making it convenient for users to replace the gas-producing battery in time, especially ensuring that the soft-pack battery of the present invention is sufficiently safe during the battery replacement process.

[0041] In some embodiments of the present invention, referring to Figure 7 The battery cell 100 can be a wound type or a laminated type battery cell.

[0042] In some embodiments of the present invention, a battery cell 100 includes a plurality of electrical chips 110 and a separator 120. Adjacent electrical chips 110 are separated by the separator 120 to prevent short circuits between the electrical chips 110. An adsorption membrane 200 is fixedly connected to the separator 120 to ensure that the adsorption membrane 200 itself is not charged.

[0043] In some specific embodiments of the present invention, the adsorption membrane 200 and the diaphragm 120 are connected by an adhesive tape 220 .

[0044] In some embodiments of the present invention, adsorption material particles 210 are distributed on the adsorption film 200 to ensure that the adsorption film 200 has sufficient air absorption capacity.

[0045] In some embodiments of the present invention, referring to Figure 1 、 Figure 2 The upper and / or lower ends of the battery cell 100 are provided with tabs 130, which extend out of the aluminum-plastic film 300. The seal 312 is located on the side of the aluminum-plastic film 300, so that the exhaust device 400 and the tabs 130 are staggered to ensure the safety of the battery cell 100 when it is powered on.

[0046] In some embodiments of the present invention, referring to Figure 5 Before being sealed, the aluminum-plastic film 300 includes a mounting portion 310 and a packaging portion 320. The packaging portion 320 is located on both sides of the mounting portion 310. The mounting portion 310 is provided with a recess 311. The battery cell 100 and the exhaust device 400 are located on the recess 311. The recess 311 corresponds to the position of the exhaust device 400 and serves as a seal 312. A side sealing edge 330 is provided between the packaging portion 320 and the mounting portion 310. The outer edge of the aluminum-plastic film 300 has an air bag sealing edge 340. Before being sealed, the battery cell 100 and the exhaust device 400 are placed in the recess 311 of the aluminum-plastic film 300. After the battery cell 100 and the exhaust device 400 are fixed, the device can be placed in the recess 311 of the aluminum-plastic film 300 after the sealing.

[0047] After the battery cell 100 and exhaust device 400 are placed in the punching hole 311, the aluminum-plastic film 300 is folded so that the packaging portion 320 covers the battery cell 100 and exhaust device 400. The side seals 330 and the airbag sealing edges 340 of the aluminum-plastic film 300 are aligned. The aluminum-plastic film 300 is then top-sealed (either at the top or bottom, depending on the tab position), followed by sealing the airbag sealing edges 340, and liquid is injected into the battery cell 100. The formation process then proceeds. After the formation process is complete, the packaging portion 320 has sufficiently sealed the battery cell 100 and exhaust device 400. The packaging portion 320 between the side seals 330 and the airbag sealing edges 340 can then be removed to ensure that the second exhaust hole 414 is permeable and exhaust can proceed.

[0048] Through the above sealing process, after the air bag sealing edge 340 is sealed, the aluminum-plastic film 300 covers the battery cell 100 and the exhaust device 400, and the packaging part 320 is combined with the side sealing edge 330 to ensure the airtight effect inside the aluminum-plastic film 300.

[0049] It is conceivable that the sizes of the mounting portion 310 and the packaging portion 320 of the aluminum-plastic film 300 are determined according to design requirements.

[0050] It is conceivable that the extension position of the air bag sealing edge 340 is determined according to the sealing process design requirements. For example, the air bag sealing edge 340 can be a circle around the aluminum-plastic film 300, or a vertical line on the left and right sides of the aluminum-plastic film 300, etc.

[0051] In some specific embodiments of the present invention, the punching pit 311 includes a first pit position 313 and a second pit position 314 , the battery cell 100 is placed in the first pit position 313 , the exhaust device 400 is placed in the second pit position 314 , and the position of the seal 312 corresponds to the second pit position 314 .

[0052] In some embodiments of the present invention, the outer wall of the exhaust housing 410 and the sealing opening 312 are sealed by a sealant 430 .

[0053] In some specific embodiments of the present invention, refer to Figure 2 The sealant 430 includes a covering portion 431 and a protruding portion 432 . The covering portion 431 covers the exhaust shell 410 , while the protruding portion 432 extends out of the exhaust shell 410 and connects to the sealing port 312 .

[0054] In some specific embodiments of the present invention, the outer wall of the exhaust shell 410 and the inner wall of the sealing opening 312 are sealed by a sealant 430 .

[0055] In some specific embodiments of the present invention, the outer wall of the exhaust shell 410 and the outer wall of the sealing opening 312 are sealed by a sealant 430 .

[0056] In some specific embodiments of the present invention, the sealant 430 is a sealing membrane covering the exhaust housing 410 , which has a good sealing effect and is easy to use, thereby improving manufacturing efficiency.

[0057] In some embodiments of the present invention, referring to Figure 3A porous isolation plate 440 is provided within the exhaust housing 410. The porous isolation plate 440 divides the interior of the exhaust housing 410 into at least two exhaust chambers 415. Adsorption filler 420 is located within the exhaust chambers 415. Gas entering the interior of the exhaust housing 410 through the first exhaust hole 412 passes through each exhaust chamber 415 in sequence before being discharged from the exhaust housing 410 through the second exhaust hole 414. This is equivalent to dividing the interior of the exhaust housing 410 into multiple adsorption layers, which can guide the airflow entering the exhaust device and improve the efficiency of gas adsorption.

[0058] In some embodiments of the present invention, referring to Figure 2 、 Figure 3 The exhaust shell 410 has a first surface 411 and a second surface 413. A plurality of first exhaust holes 412 are distributed from top to bottom on the first surface 411, and a plurality of second exhaust holes 414 are distributed from top to bottom on the second surface 413. This is equivalent to distributing the first exhaust holes 412 and the second exhaust holes 414 along the extension direction of the battery cell 100, which can improve the exhaust efficiency.

[0059] In some embodiments of the present invention, the exhaust valve 500 includes a fixed net 510 and an exhaust membrane 520. The exhaust membrane 520 covers or overlaps the fixed net 510. The fixed net 510 serves as a support structure for the exhaust membrane 520. When the air pressure applied to the exhaust valve 500 is sufficiently high, the exhaust membrane 520 is breached by the air pressure, releasing the pressure. In this way, the exhaust valve 500 functions as a pressure relief device.

[0060] In some embodiments of the present invention, the fixed net 510 includes a grid 511 and a net outer ring 512. The net outer ring 512 is located at the outer edge of the fixed net 510, and the fixed net 510 surrounds the grid 511. The net outer ring 512 can serve as a support structure for the fixed net 510 to improve the structural strength of the fixed net 510.

[0061] Other structures and operations of the soft-pack battery according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0062] Reference below Figure 1 and Figure 2 The anti-bloating soft-pack battery according to the embodiment of the present invention is described in detail using a specific embodiment. It is worth noting that the following description is only an example and does not specifically limit the present invention.

[0063] like Figure 1 and Figure 2 As shown, the anti-bloating soft-pack battery according to an embodiment of the present invention includes a battery cell 100 , an adsorption film 200 , an aluminum-plastic film 300 , an exhaust device 400 and an exhaust valve 500 .

[0064] Reference Figure 2 、 Figure 3 The battery cell 100 includes a battery chip 110, a separator 120, and a tab 130. The battery chips 110 are separated by the separator 120. Adsorption material particles 210 are provided on the adsorption film 200.

[0065] In the embodiment of the present invention, the battery cell 100 is a lithium cobalt oxide wound battery cell, the diaphragm is a PP single-layer double-sided aluminum oxide diaphragm 120, and two layers of adsorption film 200 are wound and coated on the outermost layer of the battery cell 100. The adsorption film 200 and the diaphragm 120 are fixed with green tape. The adsorption film 200 is a PP single-layer double-sided carbon dioxide and water molecule adsorption particle film.

[0066] The exhaust device 400 includes an exhaust housing 410, an adsorbent filler 420, a sealant 430, and a porous isolation plate 440. The exhaust housing 410 is provided with a first surface 411 and a second surface 413. First surface 411 is provided with a first exhaust hole 412, and second surface 413 is provided with a second exhaust hole 414. The exhaust housing 410 defines an exhaust chamber 415. The exhaust valve 500 includes a fixed mesh 510 and an exhaust membrane 520. The fixed mesh 510 includes a mesh grid 511 and an outer mesh ring 512.

[0067] The exhaust shell 410 of the exhaust device 400 is made of polypropylene (PP) with a thickness of 1mm, and a porous isolation plate 440 is arranged in the middle. The lower and upper parts of the exhaust shell 410 of the exhaust device 400 are filled with carbon dioxide and water adsorption particles respectively as the adsorption filler 420. An exhaust valve 500 is arranged at the bottom and upper parts of the exhaust device 400. The exhaust valve 500 is a polypropylene (PP) ring with a diameter of 3mm and a thickness of 1mm as a fixed net 510, and a polymer exhaust film 520 with a thickness of 0.1mm is coated in the middle. When the internal air pressure of the aluminum-plastic film is greater than 0.13MPa, the exhaust film 520 will be broken by the airflow, releasing the internal gas to prevent the soft-pack battery from bulging.

[0068] The aluminum-plastic film 300 includes a mounting portion 310, a packaging portion 320, a side sealing edge 330, and an air bag sealing edge 340. The mounting portion 310 is provided with a punching hole 311. The punching hole 311 corresponds to the position of the exhaust device 400 and serves as a seal 312.

[0069] Aluminum plastic film 300 is a three-layer aluminum plastic film with a thickness of 111m. The outermost layer is a nylon layer with a thickness of 25m. The middle aluminum foil is 40m thick and the inner layer is a polypropylene (PP) layer with a thickness of 40m. The aluminum foil punching structure is as follows: Figure 5As shown in the figure, the sealant 430 is a 0.1mm thick modified copolymer polypropylene (CPP) film. The bottom of the exhaust device 400 is aligned with the sealant 430 and then heated and sealed in place within the mold. The battery cell 100 is placed within the recess 311 of the aluminum-plastic film 300. A small amount of PMMA glue is dripped into the recess 311 of the aluminum-plastic film 300. The exhaust device 400, secured with the sealant 430, is positioned within the corresponding seal 312 of the recess 311 of the aluminum-plastic film 300. The upper end of the sealant 430 overlaps the side seal 330 of the aluminum-plastic film 300 between the battery cell and the exhaust device. The sealing temperature of the airbag seal 340 of the aluminum-plastic film 300 and the side seal 330 of the battery cell and the exhaust device is 185°C.

[0070] Then, according to the soft-pack lithium battery production process, the battery cell is baked, the aluminum-plastic film 300 is top-sealed, the air bag sealing edge 340 is sealed, the soft-pack battery is filled with liquid, formed, the excess part of the aluminum-plastic film is cut off, and the aluminum-plastic film 300 is sealed to complete the preparation of the anti-flatulence soft-pack battery.

[0071] In the soft-pack battery test of this embodiment, under overcharge conditions, lithium cobalt oxide and the electrolyte react to produce gas. When the air pressure inside the aluminum-plastic film of the soft-pack battery is greater than the set value, the exhaust membrane 520 of the exhaust device 400 arranged on the side of the soft-pack battery ruptures, releasing the gas inside the battery, preventing the soft-pack aluminum-plastic film battery from bulging, maintaining the normal shape of the soft-pack battery, and preventing damage to the electrical equipment connected to it.

[0072] In some embodiments of the present invention, the aluminum-plastic film 300 is a three-layer film 86 μm thick, with an outermost layer of nylon 15 μm thick, a middle aluminum foil 35 μm thick, and an inner layer of polypropylene (PP) 40 μm thick. The soft-pack battery test conditions in this embodiment are an electrolyte containing 500 ppm of water. During battery charging and discharging, the electrolyte decomposes, releasing gases such as water, carbon dioxide, and hydrogen fluoride. When the internal pressure of the soft-pack battery's aluminum-plastic film exceeds a set value, the vent membrane 520 of the vent device 400, located on the side of the soft-pack battery, ruptures, releasing the internal gas, preventing the soft-pack battery from bulging and maintaining its normal shape to prevent damage to connected electrical equipment.

[0073] According to the anti-bloating soft-pack battery of the embodiment of the present invention, by such a configuration, at least the following effects can be achieved: once the battery cell 100 inside the soft-pack battery of the present invention generates gas, the adsorption film 200 can adsorb part of the gas generated by the battery cell 100, and also prevent the gas generated by the battery cell 100 from directly causing the soft-pack battery of the present invention to form a bulge locally, thereby playing a certain buffering role; when the internal air pressure of the battery exceeds the set value, the gas in the battery can pass through the exhaust valve 500, that is, the gas continuously generated by the battery cell 100 can enter the exhaust shell 410 of the exhaust device 400 through the first exhaust hole 412, and the adsorption filler 420 filled in the exhaust shell 410 can adsorb the gas; when the internal air pressure of the battery continues to increase, the gas in the battery can pass through the exhaust valve 500 on the second exhaust hole 414 and be discharged outside the aluminum-plastic film 300 through the second exhaust hole 414, thereby maintaining the normal shape of the soft-pack battery and preventing the soft-pack battery from being bloated and damaged by the battery or corresponding electrical equipment.

[0074] Throughout this specification, references to the terms "some embodiments" or "it is contemplated that" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0075] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An anti-bloating soft pack battery, characterized in that: include: A battery core (100), wherein an adsorption film (200) is provided on an outer wall surface of the battery core (100), and the adsorption film (200) is capable of adsorbing gas generated by the battery core (100); an aluminum-plastic film (300), wherein the aluminum-plastic film (300) is wrapped around the outside of the battery core (100) in a sealed state, and the aluminum-plastic film (300) has a seal (312); An exhaust device (400) is located on the sealing portion (312) of the aluminum-plastic film (300). The exhaust device (400) includes an exhaust shell (410). The exhaust shell (410) has an inner cavity. An adsorption filler (420) is provided in the exhaust shell (410). A first exhaust hole (412) and a second exhaust hole (414) are provided on the exhaust shell (410). Gas generated by the battery cell (100) can sequentially pass through the first exhaust hole (412), the inner cavity of the exhaust shell (410), and the second exhaust hole (414) and then be discharged outside the aluminum-plastic film (300). The exhaust valve (500) is located on the first exhaust hole (412) and the second exhaust hole (414).

2. The anti-bloating soft-pack battery according to claim 1, characterized in that: The battery core (100) comprises a plurality of electric chips (110) and a diaphragm (120), adjacent electric chips (110) are separated by the diaphragm (120), and the adsorption film (200) is fixedly connected to the diaphragm (120).

3. The anti-bloating soft-pack battery according to claim 1, characterized in that: Adsorption material particles (210) are distributed on the adsorption film (200).

4. The anti-bloating soft-pack battery according to claim 1, characterized in that: The upper end and / or lower end of the battery cell (100) is provided with a tab (130), the tab (130) extends out of the aluminum-plastic film (300), and the seal (312) is located on the side of the aluminum-plastic film (300).

5. The anti-bloating soft-pack battery according to claim 1, characterized in that: The aluminum-plastic film (300) before being sealed comprises a mounting portion (310) and a packaging portion (320), wherein the packaging portion (320) is located on both sides of the mounting portion (310), a pit (311) is provided on the mounting portion (310), the battery cell (100) and the exhaust device (400) are located on the pit (311), and the pit (311) corresponds to the position of the exhaust device (400) as a seal (312), a side sealing edge (330) is provided between the packaging portion (320) and the mounting portion (310), and an air bag sealing edge (340) is provided on the outer edge of the aluminum-plastic film (300).

6. The anti-bloating soft-pack battery according to claim 1 or 5, characterized in that: The outer side wall of the exhaust shell (410) and the sealing opening (312) are sealed and connected via a sealant (430).

7. The anti-bloating soft-pack battery according to claim 6, characterized in that: The sealant (430) is a sealing membrane covering the exhaust housing (410).

8. The anti-bloating soft-pack battery according to claim 1, characterized in that: A porous isolation plate (440) is provided in the exhaust shell (410), and the porous isolation plate (440) divides the inner cavity of the exhaust shell (410) into at least two layers of exhaust chambers (415). The adsorption filler (420) is located in the exhaust chamber (415). The gas entering the inner cavity of the exhaust shell (410) from the first exhaust hole (412) passes through each of the exhaust chambers (415) in sequence and is discharged from the exhaust shell (410) from the second exhaust hole (414).

9. The anti-bloating soft-pack battery according to claim 1, characterized in that: The exhaust shell (410) has a first surface (411) and a second surface (413), a plurality of the first exhaust holes (412) are distributed from top to bottom on the first surface (411), and a plurality of the second exhaust holes (414) are distributed from top to bottom on the second surface (413).

10. The anti-bloating soft-pack battery according to claim 1, characterized in that: The exhaust valve (500) comprises a fixed net (510) and an exhaust membrane (520), wherein the exhaust membrane (520) covers or overlaps the fixed net (510).

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