High-strength sodium-sulfur battery

Abstract

The utility model relates to the technical field of chemical energy storage, in particular to a high-strength sodium-sulfur battery which comprises an anode cylinder, a solid electrolyte tube, an anode current collector, an anode metal piece, an insulating ring, a cathode metal piece and a closing assembly, and the closing assembly comprises a matching frame, two butt joint parts, a bottom cover, an elastic plug, a sealing ring and two fixing pieces. After the space between the anode cylinder and the solid electrolyte tube is filled with the anode current collector, the bottom cover is operated to be buckled with the assembling frame on the anode cylinder, and the bottom cover enables the sealing ring to abut against the inner wall of the anode cylinder through the elastic plug, so that the sealing strength of the assembly of the bottom cover and the anode cylinder is improved; the whole material is a high-strength ceramic material, so that the mechanical strength is improved, and the problems that the sealing strength is relatively low and the performance of the battery is reduced due to the fact that a bottom cover and a cylinder part of an existing sodium-sulfur battery are directly closed are solved.

Description

Technical Field

[0001] This utility model relates to the field of chemical energy storage technology, and in particular to a high-strength sodium-sulfur battery. Background Technology

[0002] Sodium-sulfur batteries (hereinafter referred to as NaS batteries) are high-temperature secondary batteries that operate at 300-350℃. They use sulfur as the positive electrode and metallic sodium as the negative electrode. NaS batteries operate at temperatures above 300℃, so temperature management has a significant impact on battery performance.

[0003] Prior art (CN202423502U) discloses a sodium-sulfur battery and its module battery, comprising a metal anode container, a bottomed cylindrical solid electrolyte tube housed within the anode container at a predetermined interval from the inner surface of the anode container and filled with sodium, and closed by a bottom cover; and a felt-like anode current collector impregnated with sulfur and housed within the anode container in contact with the inner surface of the anode container and the outer surface of the solid electrolyte tube. The anode current collector comprises: a felt-like matrix material composed of carbon fibers; and glass fibers complexed to the matrix material from the solid electrolyte tube side. The resistance R of the anode current collector satisfies 0.10 Ω·cm ≤ R ≤ 0.35 Ω·cm. This provides a NaS battery with excellent temperature management performance.

[0004] However, by using the above method, since the bottom cover is directly closed to the cylinder, there may be some gaps, resulting in lower sealing strength and a decrease in battery performance. Utility Model Content

[0005] The purpose of this invention is to provide a high-strength sodium-sulfur battery, which aims to solve the problem that existing sodium-sulfur batteries may have gaps due to the bottom cover being directly closed to the cylinder, resulting in low sealing strength and a decline in battery performance.

[0006] To achieve the above objectives, this utility model provides a high-strength sodium-sulfur battery, comprising an anode cylinder, a solid electrolyte tube, an anode current collector, an anode metal component, an insulating ring, a cathode metal component, and a closing assembly. The solid electrolyte tube is located inside the anode cylinder; the anode current collector is located between the anode cylinder and the solid electrolyte tube; the anode metal component is disposed on one side of the anode cylinder; the insulating ring is disposed on one side of the anode metal component; and the cathode metal component is disposed on one side of the insulating ring.

[0007] The closure assembly includes a mating frame, two mating parts, a bottom cover, an elastic plug, a sealing ring, and two fasteners;

[0008] The mating frame is fixedly connected to the anode cylinder and located on one side of the anode cylinder; the two mating parts are respectively disposed on both sides of the mating frame; the bottom cover is located on one side of the mating frame; the elastic plug is fixedly connected to the bottom cover and located on one side of the bottom cover; the sealing ring is fixedly connected to the elastic plug and located on one side of the elastic plug; the two fixing members are respectively disposed on both sides of the bottom cover.

[0009] The docking part includes a docking frame and a positioning post. The docking frame is fixedly connected to the mating frame and is located on one side of the mating frame. The positioning post is fixedly connected to the docking frame and is located on one side of the docking frame.

[0010] The closure assembly further includes a guide ring, which is fixedly connected to the sealing ring and located on one side of the sealing ring.

[0011] The fastener includes a mating block and a locking screw. The mating block is fixedly connected to the bottom cover and is located on one side of the bottom cover. The mating block has a positioning groove located on one side of the mating block. The locking screw is threadedly connected to the mating block and to the mating frame, and is located on one side of the mating block.

[0012] The closure assembly further includes an operating protrusion, which is fixedly connected to the bottom cover and located on one side of the bottom cover.

[0013] This invention discloses a high-strength sodium-sulfur battery. The battery comprises an anode cylinder, a solid electrolyte tube, an anode current collector, an anode metal component, an insulating ring, a cathode metal component, and a closing assembly. After the anode current collector fills the space between the anode cylinder and the solid electrolyte tube, the bottom cover is engaged with the adapter frame on the anode cylinder. The expansion force of the elastic plug causes the sealing ring to tightly press against the inner wall of the anode cylinder, increasing the sealing strength of the assembly between the bottom cover and the anode cylinder. Subsequently, two fixing components cooperate with two mating parts to secure the bottom cover. The anode cylinder and the solid electrolyte tube are made of high-strength ceramic material to increase mechanical strength, thereby improving the overall strength of the battery. By increasing the sealing strength of the assembly between the bottom cover and the anode cylinder, this invention solves the problem in existing sodium-sulfur batteries where the bottom cover directly closes to the cylinder, potentially leaving gaps that result in lower sealing strength and reduced battery performance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a structural schematic diagram of the entire utility model from another angle.

[0017] Figure 3 This is a cross-sectional view of the entire utility model.

[0018] Figure 4 yes Figure 3 A magnified schematic diagram of the structure at point A.

[0019] 101-Anode cylinder, 102-Solid electrolyte tube, 103-Anode current collector, 104-Anode metal part, 105-Insulating ring, 106-Cathode metal part, 107-Closing assembly, 108-Matching frame, 109-Dating part, 110-Bottom cover, 111-Elastic plug, 112-Sealing ring, 113-Fixing part, 114-Guide ring, 115-Operating protrusion, 116-Dating frame, 117-Positioning post, 118-Dating block, 119-Locking screw, 120-Positioning groove. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0021] Please see Figures 1-4 ,in, Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 2 This is a structural schematic diagram of the entire utility model from another angle. Figure 3 This is a cross-sectional view of the entire utility model. Figure 4 yes Figure 3 A magnified schematic diagram of the structure at point A.

[0022] This invention discloses a high-strength sodium-sulfur battery, comprising an anode cylinder 101, a solid electrolyte tube 102, an anode current collector 103, an anode metal component 104, an insulating ring 105, a cathode metal component 106, and a closing assembly 107. The closing assembly 107 includes a mating frame 108, two docking portions 109, a bottom cover 110, an elastic plug 111, a sealing ring 112, two fixing components 113, a guide ring 114, and an operating protrusion 115. The docking portions 109 include a docking frame 116 and a positioning post 117. The fixing components 113 include a docking block 118 and a locking screw 119. The docking block 118 has a positioning groove 120. This solution solves the problem in existing sodium-sulfur batteries where, because the bottom cover 110 directly closes with the cylinder, there may be gaps, resulting in low sealing strength and decreased battery performance.

[0023] In this specific embodiment, the anode cylinder 101, the solid electrolyte tube 102, the anode current collector 103, the anode metal component 104, the insulating ring 105, the cathode metal component 106, and the closing assembly 107 constitute a sodium-sulfur battery. The specific operation methods of the anode cylinder 101, the solid electrolyte tube 102, the anode current collector 103, the anode metal component 104, the insulating ring 105, and the cathode metal component 106 are all prior art. Referring to the patent document with publication number CN202423502U, further details are omitted here.

[0024] The mating frame 108 is fixedly connected to the anode cylinder 101 and located on one side of the anode cylinder 101; two docking portions 109 are respectively disposed on both sides of the mating frame 108; the bottom cover 110 is located on one side of the mating frame 108; the elastic plug 111 is fixedly connected to the bottom cover 110 and located on one side of the bottom cover 110; the sealing ring 112 is fixedly connected to the elastic plug 111 and located on one side of the elastic plug 111; two fixing members 113 are respectively disposed on both sides of the bottom cover 110. The anode cylinder 101, the solid electrolyte tube 102, the anode current collector 103, the anode metal part 104, the insulating ring 105, the cathode metal part 106, and the closing assembly 107 constitute a sodium-sulfur battery. When the anode current collector 103 fills the anode cylinder 101 and the solid electrolyte... After the tubes 102 are connected, the bottom cover 110 is engaged with the adapter frame on the anode cylinder 101. The bottom cover 110, through the expansion force of the elastic plug 111, causes the sealing ring 112 to tightly abut against the inner wall of the anode cylinder 101, increasing the sealing strength of the assembly between the bottom cover 110 and the anode cylinder 101. Subsequently, the two fixing parts 113 and the two docking parts 109 are engaged to complete the fixation of the bottom cover 110. The anode cylinder 101 and the solid electrolyte tube 102 are made of high-strength ceramic material to increase mechanical strength and improve the overall strength of the battery. By increasing the sealing strength of the assembly between the bottom cover 110 and the anode cylinder 101, the problem of existing sodium-sulfur batteries, where the bottom cover 110 is directly closed to the cylinder, may have some gaps, resulting in low sealing strength and a decrease in battery performance is solved.

[0025] Secondly, the docking frame 116 is fixedly connected to the mating frame 108 and is located on one side of the mating frame 108; the positioning post 117 is fixedly connected to the docking frame 116 and is located on one side of the docking frame 116. The docking frame 116 is used to cooperate with the positioning post 117 to dock with the fixing member 113. The fixing member 113 is fixed to the docking frame 116 to complete the assembly of the bottom cover 110.

[0026] Furthermore, the guide ring 114 is fixedly connected to the sealing ring 112 and is located on one side of the sealing ring 112. The outer surface of the guide ring 114 is inclined, so that when the bottom cover 110 drives the sealing ring 112 to be inserted into the anode cylinder 101, it provides a guiding effect, thereby allowing the sealing ring 112 to better contact the anode cylinder 101.

[0027] In addition, the docking block 118 is fixedly connected to the bottom cover 110 and is located on one side of the bottom cover 110; the positioning groove 120 is located on one side of the docking block 118; the locking screw 119 is threadedly connected to the docking block 118 and the docking frame 116, and is located on one side of the docking block 118. The docking block 118 is used to engage with the docking frame 116, and the positioning groove 120 is used to insert the positioning post 117. Then, by turning the locking screw 119 to thread it into the docking frame 116, the bottom cover 110 can be fixed.

[0028] Furthermore, the operating protrusion 115 is fixedly connected to the bottom cover 110 and is located on one side of the bottom cover 110. The operating protrusion 115 provides a point of force when operating the bottom cover 110, making it more convenient to operate the bottom cover 110.

[0029] In using this utility model, the anode cylinder 101, the solid electrolyte tube 102, the anode current collector 103, the anode metal component 104, the insulating ring 105, the cathode metal component 106, and the closing assembly 107 constitute a sodium-sulfur battery. After the anode current collector 103 fills the space between the anode cylinder 101 and the solid electrolyte tube 102, the bottom cover 110 is engaged with the adapter frame on the anode cylinder 101. The expansion force of the elastic plug 111 causes the sealing ring 112 to tightly abut against the inner wall of the anode cylinder 101, increasing the sealing strength of the assembly between the bottom cover 110 and the anode cylinder 101. The bottom cover 110, through the expansion force of the elastic plug 111, causes the sealing ring 112 to tightly abut against the inner wall of the anode cylinder 101. When the mounting frame is fastened to the anode cylinder 101, the two mating blocks 118 and the mating frame 116 are fastened together by the cooperation of the positioning post 117 and the positioning groove 120. Then, the two locking screws 119 are threadedly connected to the two mating frames 116 to fix the bottom cover 110. The anode cylinder 101 and the solid electrolyte tube 102 are made of high-strength ceramic material to increase mechanical strength and improve the overall strength of the battery. By increasing the assembly sealing strength between the bottom cover 110 and the anode cylinder 101, the problem of existing sodium-sulfur batteries, where the bottom cover 110 is directly closed to the cylinder, may have some gaps, resulting in low sealing strength and a decrease in battery performance is solved.

[0030] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1.A high-strength sodium-sulfur battery, comprising an anode cylinder, a solid electrolyte tube, an anode current collector, an anode metal piece, an insulating ring and a cathode metal piece, the solid electrolyte tube is located inside the anode cylinder; the anode current collector is located between the anode cylinder and the solid electrolyte tube; the anode metal piece is arranged on one side of the anode cylinder; the insulating ring is arranged on one side of the anode metal piece; the cathode metal piece is arranged on one side of the insulating ring; characterized in that, it further comprises a closing assembly, the closing assembly comprises a matching frame, two butt joints, a bottom cover, an elastic plug, a sealing ring and two fixing pieces; the matching frame is fixedly connected with the anode cylinder and located on one side of the anode cylinder; the two butt joints are arranged on the two sides of the matching frame respectively; the bottom cover is located on one side of the matching frame; the elastic plug is fixedly connected with the bottom cover and located on one side of the bottom cover; the sealing ring is fixedly connected with the elastic plug and located on one side of the elastic plug; the two fixing pieces are arranged on the two sides of the bottom cover respectively. 2.The high-strength sodium-sulfur battery of claim 1, characterized in that, the butt joint comprises a butt frame and a positioning column, the butt frame is fixedly connected with the matching frame and located on one side of the matching frame; the positioning column is fixedly connected with the butt frame and located on one side of the butt frame. 3.The high-strength sodium-sulfur battery of claim 2, characterized in that, the closing assembly further comprises a guide ring, the guide ring is fixedly connected with the sealing ring and located on one side of the sealing ring. 4.The high-strength sodium-sulfur battery of claim 3, characterized in that, the fixing piece comprises a butt block and a locking screw, the butt block is fixedly connected with the bottom cover and located on one side of the bottom cover; the butt block has a positioning groove, the positioning groove is located on one side of the butt block; the locking screw is threadedly connected with the butt block and the butt frame, and located on one side of the butt block. 5.The high-strength sodium-sulfur battery of claim 4, characterized in that, the closing assembly further comprises an operation protrusion, the operation protrusion is fixedly connected with the bottom cover and located on one side of the bottom cover. ​

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