A type of circular lithium battery

Abstract

This utility model discloses a circular lithium battery, belonging to the field of new energy technology. It includes a battery casing, which is a closed structure with an opening at the top. A core is disposed inside the battery casing. A positive electrode assembly with a sealed structure is disposed at the top of the battery casing, and a negative electrode sheet is disposed on the lower surface of the battery casing. A core post is disposed at the center of the battery casing. Several upper and lower layered partition components are fixedly installed on the outside of the core post. The partition components are used to divide the interior of the battery casing into several cavity structures. The core is a split structure and is installed separately inside each cavity structure. By dividing the core layer into several individual structures, each core layer is installed individually inside the cavity structure, thereby allowing the electrolyte to better penetrate the core layer. Regardless of the state of use, the circular lithium battery can ensure uniform charging and discharging, improving its performance.

Description

Technical Field

[0001] This utility model belongs to the field of new energy technology, specifically relating to a circular lithium battery. Background Technology

[0002] Cylindrical lithium batteries are a type of battery. They have advantages such as high specific energy, a high number of cycles, and long storage time, and are widely used in portable electronic devices.

[0003] According to the patent announcement number CN110600795B regarding a cylindrical lithium-ion battery and its processing method, this patent is known prior art. Although this patent has advantages such as reducing short-circuit rate, reducing weight, and increasing electrolyte filling space, the technical solution of this patent still has the following defects in actual use: In this patent, because the core is wound as a whole and placed inside the shell, the electrolyte is unevenly distributed inside the core during electrolyte filling. When the round lithium battery is installed or placed vertically, there is more electrolyte at the bottom and less electrolyte at the top, which affects the charging and discharging efficiency of the round lithium battery and thus seriously affects the performance of the round lithium battery. Utility Model Content

[0004] The purpose of this invention is to provide a circular lithium battery to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a circular lithium battery, comprising a battery casing, the battery casing being a closed structure with an opening at the top, a core being disposed inside the battery casing, a positive electrode assembly with a sealed structure being disposed at the upper end of the battery casing, a negative electrode sheet being disposed on the lower surface of the battery casing, a core post being disposed at the center of the battery casing, and several upper and lower layered partitioning components being fixedly installed on the outside of the core post, the partitioning components being used to divide the interior of the battery casing into several cavity structures, the core being a split structure and being respectively installed inside the cavity structure, and an insulating sleeve being disposed on the outside of the core inside each cavity structure.

[0006] In a preferred embodiment, the battery casing is provided with a protective sleeve, and the upper and lower ends of the protective sleeve are provided with holes.

[0007] In a preferred embodiment, the top opening of the battery casing is provided with an inward folded edge, the lower edge of the battery casing is provided with an inward folded groove, and the inner wall of the battery casing is provided with a plurality of sealing grooves.

[0008] In a preferred embodiment, the positive electrode assembly includes a sealing gasket that is fitted inside the top of the battery casing, a cover is provided above the sealing gasket, and a positive electrode tab is installed at the center of the top of the cover.

[0009] In a preferred embodiment, the core post is made of a conductive material, and the top end of the core post is electrically connected to the positive electrode tab.

[0010] In a preferred embodiment, the separating assembly includes several separating plates fixed to the outer wall of the core column, each separating plate having a rocker plate at its upper and lower edges, and the outer wall of each rocker plate having several sealing rings.

[0011] In a preferred embodiment, the core comprises, from the inside out, a positive electrode core layer with a winding structure, an insulating diaphragm, and a negative electrode core layer.

[0012] In a preferred embodiment, the insulating sleeve includes a first sleeve and a second sleeve installed inside the core of each cavity structure. A through hole is provided at the center of the first sleeve and the second sleeve. A conductive sheet is provided on the top of the second sleeve. A conductive ring electrically connected to the negative electrode core layer is provided between the first sleeve and the second sleeve, and the conductive ring is electrically connected to the battery casing.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This circular lithium battery divides the core layer into several individual structures, allowing each core layer to be installed separately inside the cavity structure. This allows the electrolyte to better penetrate the core layer, ensuring uniform charging and discharging regardless of the battery's operating condition and improving its performance. This circular lithium battery, through its core column design, can electrically connect the core column to the positive electrode core layer inside each cavity structure, and connect the positive electrode core layers of multiple cavity structures in series. The positive electrode core layers are transmitted through the core column to the positive electrode tab of the positive electrode assembly at the top. The negative electrode is introduced to the positive electrode plate by connecting the negative electrode core layer and the battery casing with the wires through the conductive ring, thus ensuring the normal charging and discharging of the battery. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model from one angle; Figure 2 This is another schematic diagram of the structure of this utility model; Figure 3 This is a cross-sectional view of the structure of this utility model with a battery casing. Figure 4 This is a front view of the structure of this utility model without the battery casing. Figure 5 This is a cross-sectional view of the structure of this utility model without the battery casing. Figure 6 This is an exploded view of the structure of this utility model; Figure 7 This is an exploded view of the structure of this utility model without the battery casing.

[0015] In the diagram: 1. Battery casing; 11. Folded edge; 12. Inner fold groove; 13. Sealing groove; 2. Sheath; 3. Positive electrode assembly; 31. Sealing gasket; 32. Cover; 33. Positive electrode tab; 4. Negative electrode sheet; 5. Core column; 6. Separator assembly; 61. Separator plate; 62. Rocker plate; 63. Sealing ring; 7. Core; 71. Negative electrode core layer; 72. Insulating diaphragm; 73. Positive electrode core layer; 8. Insulating sleeve; 81. Sheet layer one; 82. Sheet layer two; 83. Through hole; 84. Conductive sheet; 85. Conductive ring. Detailed Implementation

[0016] The present invention will be further described below with reference to the embodiments.

[0017] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0018] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides a circular lithium battery, including a battery casing 1, which is a closed structure with an opening at the top. A protective sleeve 2 is provided on the outside of the battery casing 1. Holes are provided at the top and bottom of the protective sleeve 2. An inwardly folded edge 11 is provided at the top opening of the battery casing 1. An inner folded groove 12 is provided at the bottom edge of the battery casing 1. A plurality of sealing grooves 13 are provided on the inner wall of the battery casing 1.

[0019] In this embodiment, the sheath 2 is used to achieve insulation and sealing of the surface of the battery casing 1. The battery casing 1 is also a commonly used arrangement as the negative electrode, thereby achieving a better encapsulation effect for the battery casing 1. The negative electrode sheet 4 is formed by processing the inner fold groove 12 at the lower end of the battery casing 1. The sealing groove 13 is designed to meet the sealing effect between each cavity structure inside the battery casing 1.

[0020] Please see Figure 5 and Figure 7 The battery casing 1 has a core 7 inside, which includes a positive electrode core layer 73, an insulating membrane 72 and a negative electrode core layer 71 with a winding structure from the inside to the outside.

[0021] In this embodiment, a typical lithium battery includes a positive electrode core layer 73, an insulating membrane 72, and a negative electrode core layer 71. This is also a commonly used existing technology, and its materials and principles will not be described in detail here.

[0022] Please see Figure 5 , Figure 6 and Figure 7 The core 7 is a split structure and is installed inside the cavity structure. An insulating sleeve 8 is provided on the outside of the core 7 inside each cavity structure. The insulating sleeve 8 includes a first sleeve 81 and a second sleeve 82 installed on the outside of the core 7 inside each cavity structure. A through hole 83 is provided at the center of the first sleeve 81 and the second sleeve 82. The through hole 83 is used for the core post 5 to pass through. A conductive sheet 84 is provided on the top of the second sleeve 82. A conductive ring 85 is provided between the first sleeve 81 and the second sleeve 82 and is electrically connected to the negative electrode core layer 71. The conductive ring 85 is also electrically connected to the battery casing 1.

[0023] In this embodiment, when processing the core 7 inside each cavity, corresponding sleeve 1 81 and sleeve 2 82 are provided on its outside to achieve individual insulation encapsulation of the core 7. A conductive ring 85 is provided in the middle of sleeve 1 81 and sleeve 2 82 so that after the core 7 is encapsulated inside the battery shell 1, the conductive ring 85 can be electrically connected to the inner wall of the battery shell 1 to transmit electrical energy to the negative electrode 4. The positive electrode core layer 73 is electrically connected to the core post 5, and the core post 5 is used to transmit electrical energy to the positive electrode tab 33.

[0024] Please see Figure 2 , Figure 3 and Figure 4 The upper end of the battery casing 1 is provided with a positive electrode assembly 3 with a sealed structure, and the lower end surface of the battery casing 1 is provided with a negative electrode sheet 4. The positive electrode assembly 3 includes a sealing gasket 31 that is fitted inside the top of the battery casing 1. A cover 32 is provided above the sealing gasket 31, and a positive electrode tab 33 is installed at the center of the top of the cover 32.

[0025] In this embodiment, when the battery is in use, the negative electrode 4 is connected to the negative electrode of the product, the positive electrode tab 33 is connected to the positive electrode of the product, the sealing gasket 31 is installed inside the upper part of the battery casing 1, and then the cover 32 and the positive electrode tab 33 are placed in sequence. The core 7 is encapsulated inside the battery casing 1 by the folded edge 11 of the battery casing 1.

[0026] Please see Figure 4 and Figure 7A core post 5 is located at the center of the battery casing 1. Several upper and lower layered partition components 6 are fixedly installed on the outside of the core post 5. The partition components 6 are used to divide the interior of the battery casing 1 into several cavity structures. The core post 5 is made of conductive material, and its top end is electrically connected to the positive electrode tab 33. The partition components 6 include several partition plates 61 fixed to the outer wall of the core post 5. The upper and lower edges of the partition plates 61 are provided with rocker plates 62. Several sealing rings 63 are provided on the outer wall of the rocker plates 62. There are three sealing rings 63 continuously distributed vertically on the outer wall of each layer of rocker plates 62, which improves the sealing effect.

[0027] In this embodiment, the partition plate 61 divides the interior of the battery casing 1 into several independent and sealed cavity structures, thereby achieving sealed installation of the individual winding core 7 inside. The positive electrode core layer 73 of the winding core 7 inside each cavity transmits electrical energy through the core post 5. Several sealing rings 63 are provided on the surface of the rocker plate 62, which can cooperate with the sealing grooves 13 on the inner wall of the battery casing 1, thereby achieving a better sealing effect between each cavity and preventing electrolyte cross-flow.

[0028] The working principle and usage process of this utility model are as follows: First, the operator divides the core 7 into several individual structures and winds the core 7 around the outside of the core post 5. The individual core 7 is installed using the partition plate 61. Then, the entire core 7, the core post 5, and the partition assembly 6 are inserted into the inside of the battery casing 1 and sealed using the positive electrode assembly 3, thereby forming a complete circular lithium battery structure. The positive and negative terminals of the battery are distributed as follows: due to the presence of the insulating sleeve 8, each cell's core 7 is externally insulated. It can only be electrically connected to the core post 5 through the positive core layer 73. The conductive plate 84 at the top of the core post 5 is electrically connected to the positive electrode tab 33, and the conductive ring 85 is electrically connected to the negative core layer 71. The conductive ring 85 is then electrically connected to the battery casing 1, and the battery casing 1 is connected to the negative electrode plate 4. The sheath 2 can seal and insulate the outer surface of the battery casing 1, so that the battery can be charged and discharged using the positive and negative terminals during use (most batteries are discharge batteries, which only need to be discharged).

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circular lithium battery, comprising a battery casing (1), characterized in that: The battery casing (1) is a closed structure with an opening at the top. A core (7) is provided inside the battery casing (1). A positive electrode assembly (3) with a sealed structure is provided at the top of the battery casing (1). A negative electrode sheet (4) is provided on the lower surface of the battery casing (1). A core post (5) is provided at the center of the battery casing (1). Several upper and lower layered partition components (6) are fixedly installed on the outside of the core post (5). The partition components (6) are used to divide the inside of the battery casing (1) into several cavity structures. The core (7) is a split structure and is installed inside the cavity structure. An insulating sleeve (8) is provided on the outside of the core (7) inside each cavity structure.

2. A round lithium battery according to claim 1, characterized in that: The battery casing (1) is provided with a protective sleeve (2) on its exterior, and the upper and lower ends of the protective sleeve (2) are provided with holes.

3. The round lithium battery of claim 1, wherein: The top opening of the battery casing (1) is provided with an inward folded edge (11), the lower edge of the battery casing (1) is provided with an inner folded groove (12), and the inner wall of the battery casing (1) is provided with a plurality of sealing grooves (13).

4. The round lithium battery of claim 1, wherein: The positive electrode assembly (3) includes a sealing gasket (31) that is fitted inside the top of the battery casing (1), and a cover (32) is provided above the sealing gasket (31). A positive electrode tab (33) is installed at the center of the top of the cover (32).

5. A circular lithium battery according to claim 4, characterized in that: The core post (5) is made of conductive material, and the top of the core post (5) is electrically connected to the positive electrode tab (33).

6. The round lithium battery of claim 1, wherein: The partition assembly (6) includes several partition plates (61) fixed on the outer wall of the core column (5). Each partition plate (61) has a rocker plate (62) at its upper and lower edges. Each rocker plate (62) has several sealing rings (63) on its outer wall.

7. The round lithium battery of claim 1, wherein: The core (7) consists of a positive electrode core layer (73), an insulating diaphragm (72), and a negative electrode core layer (71) with a winding structure, from the inside to the outside.

8. A circular lithium battery according to claim 7, characterized in that: The insulating sleeve (8) includes a first sleeve (81) and a second sleeve (82) installed outside the core (7) inside each cavity structure. A through hole (83) is provided at the center of the first sleeve (81) and the second sleeve (82). A conductive sheet (84) is provided on the top of the second sleeve (82). A conductive ring (85) electrically connected to the negative electrode core layer (71) is provided between the first sleeve (81) and the second sleeve (82). The conductive ring (85) is electrically connected to the battery casing (1).

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