A novel structured battery

Abstract

The utility model discloses a novel structure battery, including the shell of upper and lower opening, the core connection apron is placed in the shell behind, the upper mouth and the lower mouth of shell are closed after with apron, inject electrolyte. The utility model discloses battery simple structure, adopt high hardness insulating material as the shell, on apron design, novel structure battery has adopted minimalistic design, has reduced numerous spare parts, make apron's production and assembly technology get great simplification, improved production efficiency, reduced production cost.

Description

Technical Field

[0001] This utility model relates to the field of battery structure technology, and in particular to a novel battery structure. Background Technology

[0002] In the field of battery structure design technology, there are two prominent problems in the structural design of traditional batteries, which affect their performance, cost and safety.

[0003] On the one hand, the cover design of traditional batteries is complex, containing a large number of components, such as the substrate, terminals, gaskets, sealing rings, explosion-proof valves, explosion-proof membranes, filling caps, and filling plugs. The numerous components not only make the production and assembly process of the cover cumbersome, increasing the operational steps and difficulty in the production process, but also directly contribute to the high cost of the battery cells. From the perspective of simplifying the process and reducing costs, it is urgent to optimize the cover structure and adopt a more minimalist design.

[0004] On the other hand, traditional batteries mostly use metal casings, which pose numerous safety hazards in practical use. When a battery experiences a minor impact, the metal casing is prone to deformation, potentially affecting the normal operation of the internal battery cells. Simultaneously, metal casings have weak puncture resistance, making them susceptible to punctures by sharp objects, damaging the battery cells and causing safety issues. Furthermore, metal casings are susceptible to electrochemical corrosion, which gradually weakens the casing's performance, reducing the battery's lifespan and reliability.

[0005] For example, utility model application number 202323201594.6 discloses a lithium battery structure. Based on the solution provided in this application, a lithium battery structure can be realized that is simple in structure, small in size, and highly safe. However, this solution also has the following drawbacks: the cover plate structure is not optimized, and it may still suffer from the problem of numerous components in traditional cover plates. If the cover plate still includes many components such as a substrate and sealing ring, it will make it difficult to simplify the production and assembly process, increasing the operational difficulty and failing to effectively reduce the cost of the battery cell, which does not meet the requirements of minimalist design.

[0006] Therefore, in view of the shortcomings of traditional batteries in terms of cover design and casing, it is necessary to develop a new type of battery structure that uses high-hardness insulating material as the casing and is combined with a minimalist cover design to improve battery safety performance, simplify the process and reduce costs. Utility Model Content

[0007] To address the aforementioned problems, the purpose of this utility model is to provide a novel battery structure that overcomes the shortcomings of traditional batteries in terms of cover design and casing usage. It uses high-hardness insulating material as the casing and adopts a minimalist design for the cover, reducing numerous components and greatly simplifying the assembly process.

[0008] The purpose of this utility model can be achieved through the following technical solution: a novel battery structure, including a shell with openings at the top and bottom, a stacked core connecting cover plate placed inside the shell, and an electrolyte injected after the top and bottom openings of the shell are sealed with the cover plate.

[0009] As a further embodiment of this invention, the housing is made of insulating ceramic material.

[0010] As a further embodiment of this utility model, the cover plate includes a positive electrode cover plate and a negative electrode cover plate, which respectively seal the upper and lower openings of the shell.

[0011] As a further embodiment of this utility model, the positive electrode cover plate includes a positive electrode substrate, an explosion-proof valve, and an explosion-proof valve protective film.

[0012] As a further embodiment of this utility model, the negative electrode cover plate includes a negative electrode substrate, a liquid injection plug, and a liquid injection cap.

[0013] As a further embodiment of this invention, both the positive electrode substrate and the negative electrode substrate are made of conductive materials.

[0014] As a further embodiment of this utility model, positive and negative tabs extend from both ends of the stacked core, respectively.

[0015] As a further embodiment of this invention, the positive electrode substrate is connected to the positive electrode tab, and the negative electrode substrate is connected to the negative electrode tab.

[0016] As a further embodiment of this utility model, the core stack is a stacked structure or a wound structure.

[0017] As a further embodiment of this utility model, the positive electrode cover plate, the negative electrode cover plate and the shell are connected by brazing.

[0018] The beneficial effects of this utility model are:

[0019] 1. The battery structure of this utility model is simple. It uses high-hardness insulating material as the shell. In terms of cover design, the new structure battery adopts a minimalist design, which reduces the number of parts and greatly simplifies the production and assembly process of the cover, improves production efficiency and reduces production costs.

[0020] 2. This utility model uses insulating ceramic material as the shell, which has higher hardness and stronger puncture resistance than traditional metal shells, effectively reducing damage to the internal cells caused by collisions or sharp objects; at the same time, the positive electrode cover integrates an explosion-proof valve and an explosion-proof valve protective film, which can release pressure when the internal pressure of the battery is abnormal, prevent explosion, and block electrolyte leakage and external impurities from entering, providing multiple protections for battery safety.

[0021] 3. This utility model simplifies the production and assembly process**: The cover plate adopts a minimalist design, reducing the number of components such as poles, gaskets, and sealing rings found in traditional cover plates, thus reducing the complexity of production and assembly; the stacked core tabs are connected to the positive and negative electrode substrates by laser welding, and the cover plate is connected to the shell by brazing and other methods. These processes are convenient and efficient, significantly simplifying the overall production process.

[0022] 4. The positive and negative electrode substrates of this utility model are made of conductive materials and are tightly connected to the stacked electrode tabs through laser welding. The low contact resistance ensures efficient current transmission and improves charging and discharging performance. The ceramic shell is resistant to high temperature and corrosion. Combined with brazing and double liquid injection hole sealing design, it can effectively prevent electrolyte leakage and external substances from entering, maintain the internal stability of the battery, and extend its service life. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the external structure of a novel battery according to the present invention;

[0024] Figure 2 This is an exploded structural diagram of a novel battery according to the present invention.

[0025] Figure 3 and Figure 4 This is a partial cross-sectional schematic diagram of a novel battery structure according to the present invention.

[0026] 100. Shell; 110. Top opening; 120. Bottom opening;

[0027] 200. Positive electrode cover plate; 210. Positive electrode substrate; 220. Explosion-proof valve; 230. Explosion-proof valve protective film;

[0028] 300. Negative electrode cover plate; 310. Negative electrode substrate; 320. Liquid injection plug; 330. Liquid injection cap;

[0029] 400, stacked core; 410, positive tab; 420, negative tab. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] like Figures 1-4 As shown, this utility model discloses a novel battery structure, including a casing 100, which is made of insulating material, preferably ceramic material.

[0032] Ceramic materials have excellent high temperature resistance and corrosion resistance, which can provide stable and reliable protection for the internal structure of the battery and effectively prevent external factors from damaging the battery.

[0033] The casing has openings at the top and bottom, a simple structure, and is easy to manufacture, effectively reducing production costs. The openings also facilitate the installation and removal of internal battery components, making battery assembly, repair, or component replacement more convenient and efficient.

[0034] The ceramic housing 100 has an opening 110 on the top for mounting a positive electrode cover 200 and an opening 120 on the bottom for mounting a negative electrode cover 300. The positive electrode cover 200 includes only a positive electrode substrate 210 (e.g., made of aluminum), an explosion-proof valve protective film 230, and an aluminum explosion-proof valve 220.

[0035] The positive electrode substrate 210 provides a stable support structure for the entire positive electrode section, and its aluminum material allows for good current conduction. The explosion-proof valve 220 (which can also be made of aluminum) is located inside the positive electrode substrate 210 and is directly connected to the internal cavity of the battery. The explosion-proof valve 220 can be laser-welded to the positive electrode substrate 210, and an explosion-proof valve protective film 230 is affixed to its outer side. The explosion-proof valve protective film 230 acts as a protective barrier, effectively protecting the explosion-proof valve 220 and preventing accidental leakage of electrolytes and other substances from the battery to the outside. It also resists certain external impacts and the intrusion of impurities.

[0036] When the internal pressure of the battery rises abnormally, the explosion-proof valve 220 will be the first to activate. It will automatically open according to the change in internal pressure, releasing the excess pressure and preventing the battery from exploding due to excessive internal pressure, thus ensuring the safety of the battery during use.

[0037] The positive electrode substrate 210 maintains a stable structure throughout the process, ensuring normal current conduction and maintaining the basic performance of the battery.

[0038] The connection between the positive electrode substrate 210 and the explosion-proof valve 220 is laser welded to ensure that the two form a complete and sealed structural system, which further improves the overall performance and stability of the battery.

[0039] The negative electrode cover plate 300 includes only a negative electrode substrate 310 (e.g., made of aluminum), an electrolyte filling cap 330, and a rubber electrolyte filling plug 320. The negative electrode substrate 310 has an electrolyte filling hole for injecting electrolyte into the battery. After the electrolyte filling is completed, the electrolyte filling hole is first tightly plugged with the rubber electrolyte filling plug 320. Then, the electrolyte filling cap 330 (e.g., made of aluminum) is installed on the negative electrode cover plate 300 by laser welding or threaded connection to seal and protect the electrolyte filling plug 320.

[0040] The rational design and installation of the electrolyte filling cap 330 and the rubber electrolyte filling plug 320 not only ensure the smooth progress of the battery electrolyte filling process, but also provide a reliable guarantee for the long-term stable operation of the battery, preventing electrolyte leakage and the entry of external air and moisture into the battery, which would affect the battery's performance and lifespan.

[0041] The positive electrode cover 200 and negative electrode cover 300 can be connected to the casing 100 by brazing. Brazing can be performed at relatively low temperatures, which avoids the adverse effects of high temperatures on the internal materials and structure of the battery, ensuring the stability of the chemical substances and components inside the battery. Moreover, the brazed connection has good sealing and conductivity, which can effectively prevent the leakage of electrolyte inside the battery, while ensuring the smooth transmission of current inside the battery and improving the charging and discharging efficiency of the battery.

[0042] The brazing connection has high strength, which can enhance the stability of the connection between the positive electrode cover plate 200, the negative electrode cover plate 300 and the shell 100, so that the battery can still maintain the integrity of the structure when subjected to certain external impacts or vibrations, thereby improving the reliability and safety of the battery.

[0043] Furthermore, the positive electrode cover plate 200, the negative electrode cover plate 300, and the housing 100 can also be connected by adhesive sealing.

[0044] The stacked core 400 includes a stacked positive electrode tab 410 and a stacked negative electrode tab 420. The positive electrode tab 410 and the negative electrode tab 420 can be welded to the positive electrode substrate 210 and the negative electrode substrate 310 by laser welding. Laser welding has high energy density and fast welding speed, and can complete the connection between the stacked core tabs and the positive and negative electrode substrates in a short time, which greatly improves production efficiency.

[0045] Laser welding produces high-quality welds with narrow widths and deep depths, exhibiting high strength and excellent sealing. This enables a stable and reliable connection between the positive electrode tabs 410 and 420 and the positive electrode substrates 210 and 310, effectively reducing contact resistance, ensuring efficient current transfer within the battery, and thus improving the battery's charge and discharge performance.

[0046] When using:

[0047] First, an explosion-proof valve 220 is laser-welded onto the positive electrode substrate 210 and an explosion-proof valve protective film 230 is attached.

[0048] Then, the stacked core positive electrode tab 410 and the stacked core negative electrode tab 420 are respectively welded to the positive electrode substrate 210 and the negative electrode substrate 310 by laser welding.

[0049] Then, after the stacked core 400, positive electrode substrate 210 and negative electrode substrate 310 are welded together, they are placed into the housing 100 as a whole (because the positive electrode cover plate 200 and the negative electrode cover plate 300 are connected to the ceramic housing 100 by brazing, that is, the width of the positive electrode cover plate 200 and the negative electrode cover plate 300 is slightly smaller than the width of the inner cavity of the housing 100, so they can enter the housing 100).

[0050] Then, the positive electrode cover plate 200 and the negative electrode cover plate 300 are connected and sealed to the ceramic shell 100 by brazing.

[0051] Then, electrolyte is injected through the injection port.

[0052] Finally, the injection hole is sealed by inserting a rubber injection plug 320 and then laser welding the injection cap 330.

[0053] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

[0054] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

Claims

1. A novel battery structure, characterized in that, The device includes a shell with openings at the top and bottom. After the stacked core is connected to the cover plate, it is placed inside the shell. The top and bottom openings of the shell are sealed with the cover plate, and then the electrolyte is injected.

2. The novel battery structure according to claim 1, characterized in that, The housing is made of insulating ceramic material.

3. The novel battery structure according to claim 1, characterized in that, The cover plate includes a positive electrode cover plate and a negative electrode cover plate, which respectively seal the upper and lower openings of the shell.

4. A novel battery structure according to claim 3, characterized in that, The positive electrode cover plate includes a positive electrode substrate, an explosion-proof valve, and an explosion-proof valve protective film.

5. A novel battery structure according to claim 3, characterized in that, The negative electrode cover plate includes a negative electrode substrate, a liquid injection plug, and a liquid injection cap.

6. A novel battery structure according to claim 4 or 5, characterized in that, Both the positive and negative electrode substrates are made of conductive materials.

7. A novel battery structure according to claim 4, characterized in that, Positive and negative tabs extend from both ends of the stacked core, respectively.

8. A novel battery structure according to claim 7, characterized in that, The positive electrode substrate is connected to the positive electrode tab, and the negative electrode substrate is connected to the negative electrode tab.

9. A novel battery structure according to claim 1, characterized in that, The core can be a stacked structure or a wound structure.

10. A novel battery structure according to claim 3, characterized in that, The positive electrode cover plate and the negative electrode cover plate are connected to the shell by brazing.

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