Solid-state lithium battery packaging structure

Abstract

The utility model relates to the technical field of battery manufacturing equipment, in particular to a solid-state lithium battery packaging structure which comprises a polycarbonate shell, a packaging assembly is arranged in the polycarbonate shell, and a charging and discharging interface is formed in one side of the packaging assembly; the packaging assembly adopts a modular design, the lower buffer layer, the upper buffer layer, the cooling fins and other parts can be independently manufactured, large-scale production is facilitated, the production efficiency is effectively improved, meanwhile, the installation and assembly modes of all the parts are simple, the operation difficulty and the error rate in the production process are reduced, the production period is further shortened, and the production cost is reduced. The sealed packaging structure effectively prevents the contact between the interior of the battery and the external environment, reduces the potential safety hazards of battery short circuit, combustion, even explosion and the like caused by external factors, and improves the use safety of the battery. In addition, the buffer layer and the cooling fins can also play a role in preventing danger caused by overheating of the battery to a certain extent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery manufacturing equipment, in particular to a solid-state lithium battery packaging structure. BACKGROUND

[0002] In today's era of rapid technological development, batteries, as important energy storage and supply devices, are widely used in various fields, from portable electronic devices to electric vehicles, to large-scale energy storage systems, etc. Traditional liquid-state lithium batteries have many safety hazards due to their liquid electrolyte, such as short circuits, combustion, and even explosions caused by liquid leakage, which limits their application in some highly safety-demanding scenarios. With the continuous progress of materials science and battery technology, solid-state lithium batteries have emerged. Solid-state lithium batteries use solid-state electrolytes to fundamentally solve the risk of liquid electrolyte leakage, significantly improving the safety of the battery. At the same time, solid-state electrolytes also have higher ionic conductivity and stability, which are expected to improve the energy density and charge-discharge performance of the battery, and have become a research hotspot and development direction in the battery field.

[0003] For the related technology in the above, the inventor finds that there are the following defects: Most of the existing devices on the market do not have efficient heat dissipation design, and only rely on simple shell heat dissipation, which cannot quickly conduct the heat generated by battery charging and discharging. This leads to high temperature of the battery during work, accelerates the aging of the battery, reduces the service life of the battery, and is difficult to meet the demand of high-performance equipment for battery heat dissipation. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies of the prior art, in order to solve the problems mentioned in the background art, the present application provides a solid-state lithium battery packaging structure.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a solid-state lithium battery packaging structure, comprising a polycarbonate shell, a packaging assembly is arranged in the polycarbonate shell, and a charging and discharging interface is arranged on one side of the packaging assembly.

[0006] The packaging assembly comprises a lower buffer layer, an upper buffer layer, a lower heat sink, an upper heat sink and a heat sink mounting groove, the lower buffer layer is fixedly sleeved in the polycarbonate shell, the upper buffer layer is engaged on the top of the lower buffer layer, the heat sink mounting groove is arranged on the bottom of the lower buffer layer, the heat sink mounting groove is arranged on the top of the upper buffer layer, the lower heat sink is fixedly sleeved on the bottom of the lower buffer layer, and the upper heat sink is fixedly sleeved on the top of the upper buffer layer.

[0007] Optionally, the packaging assembly further comprises an anode material, a solid electrolyte material and a cathode material, the anode material is arranged inside the sealed cavity formed by the lower buffer layer and the upper buffer layer, the top of the anode material is fixedly connected with the solid electrolyte material, and the top of the solid electrolyte material is fixedly connected with the cathode material.

[0008] Optionally, the anode material comprises a plurality of anode plate materials, the solid electrolyte material comprises a plurality of solid electrolyte plate materials, and the cathode material comprises a plurality of cathode plate materials, and the anode material, the solid electrolyte material and the cathode material are stacked multiple times in the order of the anode material, the solid electrolyte material and the cathode material, and are formed into an integrated structure through a hot pressing process.

[0009] Optionally, the contact surface of the lower buffer layer and the upper buffer layer is provided with clamping grooves that can be engaged with each other, and the height of the sealed cavity formed by the lower buffer layer and the upper buffer layer is equal to the sum of the heights of the anode material, the solid electrolyte material and the cathode material.

[0010] Optionally, the contact surface of the lower buffer layer and the upper buffer layer is embedded with a hot melt sealing strip, and the lower buffer layer and the upper buffer layer encapsulate the anode material, the solid electrolyte material and the cathode material inside the sealed cavity through a static hot pressing process.

[0011] Optionally, the upper heat dissipation fins are respectively provided with sealing strips on the contact surfaces of the upper buffer layer and the polycarbonate shell, and the lower heat dissipation fins are respectively provided with sealing strips on the contact surfaces of the lower buffer layer and the polycarbonate shell, and the upper heat dissipation fins and the lower heat dissipation fins are respectively embedded in the positioning grooves at the top and the bottom of the polycarbonate shell.

[0012] In summary, the present application has the following beneficial technical effects:

[0013] 1、The packaging assembly adopts modular design, and the lower buffer layer, the upper buffer layer and the heat dissipation fins can be manufactured separately, so that the production efficiency is effectively improved.

[0014] 2、The utility model discloses in using, through the integrated structure of hot pressing process formation, make the contact of multilayer anode plate material, multilayer solid electrolyte plate material and multilayer cathode plate material more closely, evenly, help optimizing the ion transmission and electron conduction of battery interior, thereby promote the consistency of battery group whole performance, reduce individual difference, improve the overall quality of battery, and the charge -discharge interface is set up in the one side of encapsulation subassembly, and it is convenient to connect external circuit and carry out the charging and discharging operation. Meanwhile, this structure design makes in the battery failure or needs to replace part component, it is convenient to disassemble and maintain, reduced maintenance cost and time cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic diagram of equipment in the embodiment of the application;

[0016] Figure 2 It is the local structure schematic diagram of equipment in the embodiment of the application;

[0017] Figure 3 It is the local structure schematic diagram of encapsulation subassembly in the embodiment of the application;

[0018] Figure 4 It is the local structure schematic diagram of encapsulation subassembly in the embodiment of the application;

[0019] Fig. 1, polycarbonate shell;2, encapsulation subassembly;201, lower buffer layer;202, upper buffer layer;203, lower fin;204, upper fin;205, fin mounting groove;206, anode material;207, solid electrolyte material;208, cathode material;3, charge-discharge interface. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings Figures 1-4 The application is further described in detail.

[0021] The embodiment of the application discloses a solid-state lithium battery packaging structure.

[0022] Please refer to Figure 1 A solid-state lithium battery packaging structure, comprising a polycarbonate shell 1, the inside of polycarbonate shell 1 is provided with encapsulation subassembly 2, one side of encapsulation subassembly 2 is provided with charge-discharge interface 3;

[0023] Please refer to Figures 2 to 4, the packaging assembly 2, the packaging assembly 2 includes lower buffer layer 201, upper buffer layer 202, lower fin 203, upper fin 204 and fin mounting groove 205, lower buffer layer 201 fixedly sleeved in the inside of polycarbonate shell 1, the top of lower buffer layer 201 is engaged with upper buffer layer 202, the bottom of lower buffer layer 201 is provided with fin mounting groove 205, the top of upper buffer layer 202 is provided with fin mounting groove 205, the bottom of lower buffer layer 201 is fixedly sleeved with lower fin 203, the top of upper buffer layer 202 is fixedly sleeved with upper fin 204.

[0024] The packaging assembly 2 further comprises an anode material 206, a solid-state electrolyte material 207 and a cathode material 208, the anode material 206 is arranged inside the sealed cavity formed by the lower buffer layer 201 and the upper buffer layer 202, the top of the anode material 206 is fixedly connected with the solid-state electrolyte material 207, and the top of the solid-state electrolyte material 207 is fixedly connected with the cathode material 208.

[0025] The anode material 206 comprises a plurality of layers of anode plate materials, the solid-state electrolyte material 207 comprises a plurality of layers of solid-state electrolyte plate materials, and the cathode material 208 comprises a plurality of layers of cathode plate materials, and the anode material 206, the solid-state electrolyte material 207 and the cathode material 208 are stacked multiple times in sequence and formed into an integrated structure through a hot pressing process.

[0026] The contact surface of the lower buffer layer 201 and the upper buffer layer 202 is provided with clamping grooves that can be engaged with each other, and the height of the sealed cavity formed by the lower buffer layer 201 and the upper buffer layer 202 is equal to the sum of the heights of the anode material 206, the solid-state electrolyte material 207 and the cathode material 208.

[0027] The contact surface of the lower buffer layer 201 and the upper buffer layer 202 is embedded with a hot melt sealing strip, and the lower buffer layer 201 and the upper buffer layer 202 encapsulate the anode material 206, the solid-state electrolyte material 207 and the cathode material 208 inside the sealed cavity through a static hot pressing process.

[0028] The contact surface of the upper fin 204 and the upper buffer layer 202 and the polycarbonate shell 1 is provided with a sealing strip, respectively, and the contact surface of the lower fin 203 and the lower buffer layer 201 and the polycarbonate shell 1 is provided with a sealing strip, respectively, and the upper fin 204 and the lower fin 203 are embedded in the positioning groove at the top and the bottom of the polycarbonate shell 1, respectively.

[0029] Further explanation is needed:

[0030] The packaging assembly 2 as a key component of the solid-state lithium battery plays an indispensable role. From the structural perspective, it is composed of a lower buffer layer 201, an upper buffer layer 202, a lower heat sink 203, an upper heat sink 204, and a heat sink mounting groove 205. The lower buffer layer 201 is fixed inside the polycarbonate shell 1 and cooperates with the upper buffer layer 202 that can be engaged at the top to build a stable containing space. This design not only provides physical support for the internal battery materials but also forms a sealed packaging environment under static heat pressing process through the interlocking card slot and hot melt sealing strip, effectively isolating external impurities, ensuring the stability of the internal structure of the battery, preventing internal materials from being damaged by external factors, and ensuring the stability of the battery performance.

[0031] In terms of packaging internal materials, the packaging assembly 2 contains anode material 206, solid-state electrolyte material 207, and cathode material 208. These materials are stacked multiple times according to a specific order and form an integrated structure through heat pressing process. This structural design greatly improves the charging and discharging efficiency of the battery. The close combination of multiple layers of materials optimizes the ion transmission and electron conduction path inside the battery, enabling the battery to efficiently convert and output electrical energy, meeting the high requirements of various devices on battery performance.

[0032] In addition, the heat dissipation and protection function of the packaging assembly 2 is also crucial. The lower heat sink 203 and the upper heat sink 204 are fixed in the upper and lower buffer layers and embedded in the positioning groove of the polycarbonate shell 1. The contact surface with the shell is provided with a sealing strip, which can timely dissipate the heat generated during battery operation, avoiding performance degradation or shortened life due to overheating. At the same time, the buffer layer can play a buffering role when the battery is subjected to external impact, reducing the damage of impact force to the internal precision materials, further prolonging the service life of the battery, and ensuring the safe and stable operation of the battery in various complex environments.

[0033] The working principle of the above embodiment is as follows:

[0034] Firstly, when the solid-state lithium battery is connected to the external circuit for charging and discharging, the multi-layer anode material 206, the multi-layer solid-state electrolyte material 207, and the multi-layer cathode material 208 in the packaging assembly 2 begin to play a role. During the charging process, the electrical energy provided by the external power source promotes the lithium ions in the anode material 206 to move away and move to the cathode material 208 through the solid-state electrolyte material 207, while the electrons flow to the cathode through the external circuit, realizing the conversion of electrical energy to chemical energy and storing it.

[0035] Secondly, when the battery discharges, the stored chemical energy begins to convert into electrical energy, lithium ions in the cathode material 208 move to the anode material 206 through the solid-state electrolyte material 207, and electrons flow from the anode to the cathode through the external circuit to form an electric current to power external devices. The stack of multi-layer materials and the integrated structure formed by hot pressing optimize the conduction path of ions and electrons, ensuring efficient charging and discharging process.

[0036] Then, as the battery works, heat is generated, at this time, the lower heat sink 203 and the upper heat sink 204 begin to play a role, the heat generated by the battery is transferred to the upper and lower buffer layers in close contact with it, and then conducted to the upper and lower heat sinks by the buffer layers. Since the heat sinks are respectively embedded in the positioning grooves at the top and bottom of the polycarbonate shell 1, and the contact surface with the shell is provided with a sealing strip, the heat can be quickly transferred to the polycarbonate shell 1 through the heat sinks, and then dissipated to the external environment, thereby effectively controlling the battery temperature and avoiding the influence of overheating on the performance and life of the battery.

[0037] Next, when the battery is impacted by the outside world, the buffering effect of the lower buffer layer 201 and the upper buffer layer 202 begins to appear. Since their contact surfaces are provided with clamping grooves that can engage with each other, and hot melt sealing strips are embedded inside, when impacted, the buffer layer can absorb and disperse the impact force by its elastic deformation, reducing the damage of the impact force to the precise structure of the internal anode material 206, solid-state electrolyte material 207 and cathode material 208, and protecting the integrity of the internal components of the battery.

[0038] Finally, the overall sealed structure of the packaging assembly 2 plays a key role. The sealed cavity formed by the static hot pressing process of the lower buffer layer 201 and the upper buffer layer 202, as well as the sealing strips everywhere, effectively isolates the moisture, oxygen and other impurities from the outside world, which not only prevents the oxidation and corrosion of the internal materials, ensures the stability of the electrochemical performance of the battery, but also avoids the safety problems such as short circuit caused by the entry of impurities, and ensures the safe and stable operation of the battery in various environments.

[0039] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the basis of the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A solid-state lithium battery packaging structure comprising a polycarbonate enclosure (1), characterized by: The inside of the polycarbonate shell (1) is provided with a packaging assembly (2), one side of the packaging assembly (2) is provided with a charge-discharge interface (3); The packaging assembly (2) comprises a lower buffer layer (201), an upper buffer layer (202), a lower heat sink (203), an upper heat sink (204) and a heat sink mounting groove (205), the lower buffer layer (201) is fixedly sleeved in the inside of the polycarbonate shell (1), the top of the lower buffer layer (201) is engaged with the upper buffer layer (202), the bottom of the lower buffer layer (201) is provided with a heat sink mounting groove (205), the top of the upper buffer layer (202) is provided with a heat sink mounting groove (205), the bottom of the lower buffer layer (201) is fixedly sleeved with the lower heat sink (203), and the top of the upper buffer layer (202) is fixedly sleeved with the upper heat sink (204).

2. The solid-state lithium battery packaging structure of claim 1, wherein: The packaging assembly (2) further comprises an anode material (206), a solid-state electrolyte material (207) and a cathode material (208), the anode material (206) is arranged in the sealed cavity formed by the lower buffer layer (201) and the upper buffer layer (202), the top of the anode material (206) is fixedly connected with the solid-state electrolyte material (207), and the top of the solid-state electrolyte material (207) is fixedly connected with the cathode material (208).

3. The solid-state lithium battery packaging structure of claim 2, wherein: The anode material (206) comprises a plurality of layers of anode plate materials, the solid-state electrolyte material (207) comprises a plurality of layers of solid-state electrolyte plate materials, the cathode material (208) comprises a plurality of layers of cathode plate materials, and the anode material (206), the solid-state electrolyte material (207) and the cathode material (208) are stacked multiple times in the order of the anode material (206), the solid-state electrolyte material (207) and the cathode material (208), and form an integrated structure through a hot pressing process.

4. The solid-state lithium battery packaging structure of claim 1, wherein: The contact surface of the lower buffer layer (201) and the upper buffer layer (202) is provided with a clamping groove which can be engaged with each other, and the height of the sealed cavity formed by the lower buffer layer (201) and the upper buffer layer (202) is equal to the sum of the heights of the anode material (206), the solid-state electrolyte material (207) and the cathode material (208).

5. The solid-state lithium battery packaging structure of claim 1, wherein: The contact surface of the lower buffer layer (201) and the upper buffer layer (202) is embedded with a hot melt sealing strip, and the lower buffer layer (201) and the upper buffer layer (202) encapsulate the anode material (206), the solid-state electrolyte material (207) and the cathode material (208) in the inside of the sealed cavity through a static hot pressing process.

6. The solid-state lithium battery packaging structure of claim 1, wherein: The contact surface of the upper heat sink (204) and the upper buffer layer (202) and the polycarbonate shell (1) is provided with a sealing strip, and the contact surface of the lower heat sink (203) and the lower buffer layer (201) and the polycarbonate shell (1) is provided with a sealing strip, and the upper heat sink (204) and the lower heat sink (203) are respectively embedded in the positioning grooves at the top and the bottom of the polycarbonate shell (1).

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