Soft package lithium battery

Abstract

The utility model discloses a soft package lithium battery which comprises an outer packaging shell, a soft package battery body is fixedly installed in the outer packaging shell, a plurality of buffering air columns which are linearly distributed at equal intervals are arranged outside the soft package battery body, and the buffering air columns are arranged outside the soft package battery body in a surrounding and sleeving mode. The exteriors of the plurality of buffer air columns are jointly coated with an inner middle-layer shell, a cavity is formed between the inner middle-layer shell and the outer packaging shell, a plurality of uniformly distributed buffer particle balls are arranged in the cavity and located on the upper and lower exteriors of the inner middle-layer shell, and a plurality of uniformly distributed side heat conduction columns are fixedly mounted on the outer walls of the two sides of the soft package battery body; according to the soft package battery, external pressure can be effectively buffered and resisted through the buffer particle balls which are elastically deformed, so that the internal soft package battery body can be better protected from being damaged, and the soft package battery has a certain buffer protection effect; the buffer protection performance of the internal structure of the battery is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically a soft-pack lithium battery. Background Technology

[0002] Lithium batteries can be broadly classified into two categories: lithium metal batteries and lithium-ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable. The fifth generation of rechargeable batteries, lithium metal batteries, was developed in 1996, and their safety, specific capacity, self-discharge rate, and performance-price ratio are all superior to lithium-ion batteries.

[0003] Soft-pack lithium batteries are a new type of battery that consists of a liquid lithium-ion battery encased in a polymer shell and is structurally packaged with an aluminum-plastic film. In the event of a safety hazard, a soft-pack lithium battery will at most swell and crack. Inside the soft-pack lithium battery is a liquid electrolyte, and the outside of the battery feels slightly soft to the touch. Small soft-pack lithium batteries have advantages such as good safety performance, light weight, large capacity, low internal resistance, and flexible design. Today, small soft-pack lithium batteries are widely used in digital products, electronic products and other fields.

[0004] However, traditionally used small pouch lithium batteries do not have good pressure resistance during use. When the small pouch lithium battery is subjected to external pressure or impact, the force will directly affect the lithium battery body. The buffer protection is insufficient, which can easily lead to direct force damage to the pouch lithium battery and reduce the overall service life of the small pouch lithium battery. Utility Model Content

[0005] The purpose of this invention is to provide a soft-pack lithium battery to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a soft-pack lithium battery, comprising an outer packaging shell, a soft-pack battery body fixedly installed inside the outer packaging shell, a plurality of equally spaced linearly distributed buffer air columns arranged outside the soft-pack battery body, the buffer air columns being sleeved around the outside of the soft-pack battery body, an inner middle shell covering the outside of the plurality of buffer air columns, a cavity being provided between the inner middle shell and the outer packaging shell, a plurality of uniformly distributed buffer spheres being arranged inside the cavity and located on the upper and lower outer sides of the inner middle shell, and a plurality of uniformly distributed side heat-conducting columns being fixedly installed on the outer walls of both sides of the soft-pack battery body.

[0007] Preferably, the side heat-conducting pillars are made of copper metal, and a plurality of the side heat-conducting pillars are arranged through the inner middle shell structure.

[0008] Preferably, the top surface of the plurality of side heat-conducting pillars is at the same horizontal plane as the side surface of the outer packaging shell.

[0009] Preferably, the buffer granules are made of buffer silicone material and are solid spheres.

[0010] Preferably, the buffer column is filled with an inert gas, namely helium.

[0011] Preferably, two terminals are fixedly installed on the upper surface of the outer packaging shell. The two terminals are a positive terminal and a negative terminal, respectively, and the positive terminal and the negative terminal are electrically connected to the internal soft-pack battery body.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention uses elastically deformable buffer spheres to effectively buffer and resist external pressure, thereby better protecting the internal soft-pack battery from damage. It has a certain buffering protection effect and improves the buffering protection performance of the battery's internal structure.

[0014] Meanwhile, the buffer air columns can use the internal gas to provide a final air cushion-like buffer against external forces, thereby achieving a secondary buffer protection effect for the internal soft-pack battery. By using the buffer granules and buffer air columns in combination, the soft-pack lithium battery of this invention can have multiple internal buffer protection effects, better buffer against external forces, effectively improve the comprehensive protection effect of the internal soft-pack battery, avoid external forces acting directly on the internal battery, and improve the battery's service life.

[0015] Meanwhile, the battery body inside this utility model is provided with a side heat conduction column. After the internal temperature is raised, the heat inside can be discharged, so that the discharged heat can be exchanged with the ambient air at room temperature. This ensures that the internal heat is dissipated in a timely manner, avoids overheating and short circuit of the battery, effectively improves the safety and heat dissipation of the battery, and improves the overall service life of the battery.

[0016] Furthermore, the buffer gas columns are filled with inert gas, specifically helium. This structural design allows the flame to burn through several of the outer buffer gas columns when an open flame appears inside the soft-pack battery. At this point, the helium gas inside the buffer gas columns is released, and the released helium gas provides a certain degree of flame retardancy, effectively suppressing the spread of the flame and providing a certain amount of flame-retardant time for emergency handling. This improves the safety of the structure and makes the buffer gas columns not only have a gas buffering function, but also provide good flame retardancy with the released inert gas, thus offering versatility in function and improving the overall safety of the battery. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall external structure of the lithium battery according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the outer packaging shell according to an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the top planar structure of the outer packaging shell according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the sandwich structure between the outer packaging shell and the inner middle shell in an embodiment of the present utility model.

[0021] Figure 5 This is a schematic diagram of the sandwich structure between the soft-pack battery body and the inner middle shell in an embodiment of this utility model.

[0022] In the diagram: 1. Outer packaging shell; 2. Soft-pack battery body; 3. Buffer gas column; 4. Inner middle shell; 5. Buffer pellets; 6. Side heat conduction column; 7. Positive terminal; 8. Negative terminal. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figure 1-5This utility model provides one embodiment: a soft-pack lithium battery, including an outer packaging shell 1, with a soft-pack battery body 2 fixedly installed inside the outer packaging shell 1, as detailed in the specification, including the escalator 3 and... Figure 5 As shown, the soft-pack battery body 2 is provided with several equally spaced linearly distributed buffer air columns 3, which are wrapped around the outside of the soft-pack battery body 2.

[0027] This structural design, through the set buffer air column 3, can effectively provide gas-type buffer protection for the internal lithium battery, thereby improving the buffer protection effect of the internal battery body.

[0028] For further details, please refer to the appendix to the instruction manual. Figure 4 As shown, several buffer air columns 3 are collectively covered by an inner middle shell 4. A cavity is provided between the inner middle shell 4 and the outer encapsulation shell 1. Several evenly distributed buffer particle balls 5 are provided in the cavity and located on the upper and lower exterior of the inner middle shell 4. The buffer particle balls 5 are made of buffer silicone material and are solid spheres.

[0029] Based on the above structure, when the outer packaging shell 1 of the soft-pack lithium battery of this utility model is subjected to external pressure or impact, the pressure or impact force will cause the outer packaging shell 1 to deform to a certain extent, causing a local inward indentation in the outer packaging shell 1. The indented area will squeeze the buffer particle ball 5 inward. As a result, the buffer particle ball 5 will undergo a certain elastic deformation due to the external pressure. The elastically deformed buffer particle ball 5 can effectively buffer and resist the external pressure, thereby better protecting the internal soft-pack battery body 2 from damage. It has a certain buffer protection effect and improves the buffer protection performance of the internal structure of the battery.

[0030] When the external pressure or impact is too great, the external force compresses the buffer spheres 5 to their deformation limit. This compression then acts on the inner middle shell 4, causing it to deform and indent. Several surrounding buffer air columns 3 are arranged between the deformed inner middle shell 4 and the soft-pack battery body 2. These buffer air columns 3 use internal gas to provide a final air cushion-like buffer against external forces, thus achieving a secondary buffer protection effect for the inner soft-pack battery body 2. Through the combined use of the buffer spheres 5 and the buffer air columns 3, the soft-pack lithium battery of this invention has multiple internal buffer protection effects, better buffering and resisting external forces, effectively improving the comprehensive protection effect of the inner soft-pack battery body 2, preventing external forces from directly acting on the inner battery body 2, and extending the battery's lifespan.

[0031] In this embodiment, in order to better dissipate the internal heat of the soft-pack lithium battery of the present invention, and to help the internal heat conduction and dissipation work and improve the heat dissipation effect, a number of evenly distributed side heat-conducting columns 6 are fixedly installed on the outer walls of both sides of the soft-pack battery body 2.

[0032] The side heat conduction pillars 6 are made of copper metal material, and several side heat conduction pillars 6 are arranged through the inner middle shell 4 structure.

[0033] Among them, the top surface of several side heat-conducting pillars 6 is at the same level as the side surface of the outer packaging shell 1. In this way, the side heat-conducting pillars 6 can conduct heat out after the internal temperature rises, so that the conducted heat can be exchanged with the outside room temperature air, ensuring that the internal heat is dissipated in a timely manner, avoiding overheating and short circuit of the battery, effectively improving the safety and heat dissipation of the battery, and improving the overall service life of the battery.

[0034] In this embodiment, to provide some flame-retardant protection for the lithium battery, the buffer gas column 3 is filled with an inert gas, namely helium. With this structural design, when an open flame appears inside the soft-pack battery body 2, the flame can burn through several of the outer buffer gas columns 3. At this time, the helium filling inside the buffer gas column 3 is discharged, and the discharged helium can play a certain flame-retardant role, effectively suppressing the spread of the flame and providing a certain flame-retardant time for emergency handling, thus improving the safety of the structure. The buffer gas column 3 not only has the buffering effect of the gas, but also the discharged inert gas has a good flame-retardant effect, which has the versatility of function and improves the overall safety of the battery.

[0035] In this embodiment, in order to ensure the normal power connection of the soft-pack lithium battery of this utility model, two terminals are fixedly installed on the upper surface of the outer packaging shell 1. The two terminals are positive terminal 7 and negative terminal 8, respectively. Positive terminal 7 and negative terminal 8 are electrically connected to the internal soft-pack battery body 2.

[0036] Working principle: This utility model has two terminals on the outside of the soft-pack lithium battery, namely the positive terminal 7 and the negative terminal 8. The positive terminal 7 and the negative terminal 8 can ensure normal power connection and normal use of this utility model.

[0037] When the outer packaging shell 1 of the soft-pack lithium battery of this utility model is subjected to external pressure or impact, the pressure or impact force will cause the outer packaging shell 1 to deform to a certain extent, causing local inward indentation of the outer packaging shell 1. The indented area will squeeze the buffer particle ball 5 inward. As a result, the buffer particle ball 5 will undergo a certain elastic deformation due to the external pressure. The elastically deformed buffer particle ball 5 can effectively buffer and resist the external pressure, thereby better protecting the internal soft-pack battery body 2 from damage. It has a certain buffer protection effect and improves the buffer protection performance of the internal structure of the battery.

[0038] When the external pressure or impact is too great, the external force compresses the buffer spheres 5 to their deformation limit. This compression then acts on the inner middle shell 4, causing it to deform and dent. Several surrounding buffer air columns 3 are arranged between the deformed inner middle shell 4 and the soft-pack battery body 2. These buffer air columns 3 use internal gas to provide a final air cushion-like buffer against external forces, thus achieving a secondary buffer protection effect for the inner soft-pack battery body 2. By using the buffer spheres 5 and buffer air columns 3 in combination, the soft-pack lithium battery of this invention can have multiple internal buffer protection effects, better buffering and resisting external forces, effectively improving the comprehensive protection effect of the inner soft-pack battery body 2, preventing external forces from directly acting on the inner battery body 2, and improving the battery's service life.

[0039] Meanwhile, the battery body inside this utility model is provided with a side heat conduction column 6. After the internal temperature is raised, the heat inside can be discharged, so that the discharged heat can be exchanged with the ambient air at room temperature. This ensures that the internal heat is dissipated in a timely manner, avoids overheating and short circuit of the battery, effectively improves the safety and heat dissipation of the battery, and improves the overall service life of the battery.

[0040] Furthermore, the buffer gas column 3 is filled with an inert gas, namely helium. With this structural design, when an open flame appears inside the soft-pack battery body 2, the flame can burn through several of the outer buffer gas columns 3. At this time, the helium filling inside the buffer gas column 3 is discharged. The discharged helium can play a certain flame-retardant role, which can effectively suppress the spread of the flame and provide a certain flame-retardant time for emergency handling, thereby improving the safety of the structure. The buffer gas column 3 not only has the buffering function of the gas, but also the discharged inert gas has a good flame-retardant effect, which has the versatility of function and improves the overall safety of the battery.

[0041] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A soft-pack lithium battery, comprising an outer packaging shell (1), characterized in that, The soft-pack battery body (2) is fixedly installed inside the outer packaging shell (1). Several equally spaced linearly distributed buffer air columns (3) are arranged on the outside of the soft-pack battery body (2). The buffer air columns (3) are wrapped around the outside of the soft-pack battery body (2). The outer sides of the several buffer air columns (3) are covered by an inner middle shell (4). A cavity is provided between the inner middle shell (4) and the outer packaging shell (1). Several uniformly distributed buffer particle balls (5) are arranged in the cavity and on the upper and lower outer sides of the inner middle shell (4). Several uniformly distributed side heat conduction columns (6) are fixedly installed on the outer walls of both sides of the soft-pack battery body (2).

2. The soft-pack lithium battery of claim 1, wherein: The side heat-conducting pillars (6) are made of copper metal material, and several of the side heat-conducting pillars (6) are arranged through the inner middle shell (4). 3.The soft-pack lithium battery of claim 1, wherein: The top surface of several of the side heat-conducting pillars (6) is at the same level as the side surface of the outer packaging shell (1).

4. The soft-pack lithium battery of claim 1, wherein: The buffer particle ball (5) is made of buffer silicone material and is a solid sphere.

5. The soft-pack lithium battery of claim 1, wherein: The buffer column (3) is filled with an inert gas, which is helium. 6.The soft-pack lithium battery of claim 1, wherein: Two terminals are fixedly installed on the upper surface of the outer casing (1). The two terminals are a positive terminal (7) and a negative terminal (8). The positive terminal (7) and the negative terminal (8) are electrically connected to the internal soft-pack battery body (2).

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