Laminated sodium ion battery structure

Abstract

The utility model relates to the technical field of sodium-ion batteries, in particular to a laminated sodium-ion battery structure which comprises a plurality of upper pole pieces, lower pole pieces and limiting sleeve seats, the upper pole pieces and the lower pole pieces are arranged in a staggered and stacked mode, the upper pole pieces comprise upper positive pole pieces, upper diaphragms and upper negative pole pieces, and the lower pole pieces comprise lower positive pole pieces and lower negative pole pieces. The upper diaphragm is pressed and fixed between the upper positive plate and the upper negative plate, the lower pole plate comprises a lower positive plate, a lower diaphragm and a lower negative plate, the lower diaphragm is pressed and fixed between the lower positive plate and the lower diaphragm, the upper pole plate and the lower pole plate which are stacked are sleeved with the limiting sleeve seat, and a barrier strip is fixedly installed in the limiting sleeve seat. One side of the limiting sleeve seat is provided with a blocking frame assembly used for limiting the stacked upper pole piece and lower pole piece, the damaged part of the pole piece can be independently disassembled to be replaced, so that the whole pole piece does not need to be replaced, and the later maintenance cost of the sodium ion battery is favorably reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sodium ion batteries, in particular to a laminated sodium ion battery structure. Background Art

[0002] Sodium-ion battery is a secondary battery that relies on the movement of sodium ions between the positive and negative electrodes to complete charging and discharging. Its working principle is similar to that of the widely used lithium-ion battery. The positive electrode of the sodium-ion battery usually uses vanadate materials, while the negative electrode uses carbon materials or vanadium oxide. When charging, sodium ions migrate from the positive electrode to the negative electrode and are embedded in the carbon or vanadium oxide at the negative electrode. During discharge, sodium ions are released from the negative electrode and return to the positive electrode, releasing the stored energy at the same time.

[0003] After searching, the Chinese patent authorization publication number CN 218677262 U discloses a laminated sodium-ion battery structure. Although the positive electrode sheet is designed as an integrally formed sheet structure and the negative electrode sheet is a multiple-slice structure, the positive electrode sheet and the separator can be directly laminated and composited on the separator. However, due to the limitation of the integrally formed positive electrode sheet structure, if part of the electrode sheet is damaged, it is impossible to remove the damaged electrode sheet separately for replacement. The entire electrode sheet needs to be replaced, which increases the subsequent maintenance cost of the sodium-ion battery. Therefore, we propose a laminated sodium-ion battery structure to solve the above problems. Utility Model Content

[0004] The purpose of the present invention is to provide a laminated sodium ion battery structure to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A laminated sodium ion battery structure comprises a plurality of upper pole pieces, a lower pole piece and a limiting sleeve, wherein the upper pole piece and the lower pole piece are arranged in an alternating stack, the upper pole piece comprises an upper positive pole piece, an upper diaphragm and an upper negative pole piece, the upper diaphragm is pressed and fixed between the upper positive pole piece and the upper negative pole piece, the lower pole piece comprises a lower positive pole piece, a lower diaphragm and a lower negative pole piece, the lower diaphragm is pressed and fixed between the lower positive pole piece and the lower diaphragm, the limiting sleeve is sleeved on the outside of the stacked upper and lower pole pieces, a stop bar is fixedly installed inside the limiting sleeve, and a stop frame assembly for limiting the stacked upper and lower pole pieces is provided on one side of the limiting sleeve.

[0007] Preferably, the baffle frame assembly includes a baffle frame and a limiting insert, the limiting insert is fixedly connected to the top side of the baffle frame, an upper groove is provided on the inner top surface of the limiting sleeve, the end of the limiting insert is adapted to the upper groove, and a fastening screw is threadedly connected between the limiting sleeve and the limiting insert.

[0008] Preferably, the number of the limiting inserts is two, and the two limiting inserts are symmetrically distributed.

[0009] Preferably, two support bars are symmetrically fixedly connected to the bottom side of the baffle frame, and a lower groove is formed on the inner bottom surface of the limiting sleeve, and the ends of the support bars are adapted to the lower groove.

[0010] Preferably, a countersunk hole is provided on the top of the limiting sleeve, and the end cap of the fastening screw is located in the countersunk hole.

[0011] Preferably, a positive electrode tab is fixedly provided on one end of the upper positive electrode sheet, and a negative electrode tab is fixedly provided on the side of the lower positive electrode sheet.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model arranges the upper electrode pieces and the lower electrode pieces in an interlaced stack, and the limiting sleeve is sleeved on the outside of the stacked upper electrode pieces and the lower electrode pieces, and the blocking bar can produce a backward blocking effect on the stacked upper electrode pieces and the lower electrode pieces, and the end of the limiting insert is cooperated and inserted into the upper groove, and the blocking frame can produce a forward blocking effect on the stacked upper electrode pieces and the lower electrode pieces, and the end of the supporting bar is cooperated and inserted into the lower groove, so that the supporting bar can play a good supporting role for the stacked upper electrode pieces and the lower electrode pieces, and the limiting insert is locked on the limiting sleeve by using a fastening screw. If part of the electrode pieces is damaged, the fastening screw is loosened, and the blocking frame, the limiting insert and the supporting bar are pulled forward, and the damaged part of the electrode pieces can be removed separately for replacement, so that there is no need to replace the entire electrode piece, which is beneficial to reducing the later maintenance cost of the sodium ion battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of a laminated sodium ion battery structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the upper electrode and the lower electrode in a laminated sodium ion battery structure of the present invention;

[0016] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of a baffle assembly in a laminated sodium ion battery structure of the present invention;

[0018] Figure 5 The utility model is a cross-sectional structural schematic diagram of a laminated sodium ion battery structure.

[0019] In the figure: 1. Upper electrode; 101. Upper positive electrode; 102. Upper diaphragm; 103. Upper negative electrode; 104. Positive tab; 2. Lower electrode; 201. Lower positive electrode; 202. Lower diaphragm; 203. Lower negative electrode; 204. Negative tab; 3. Limiting sleeve; 301. Stop bar; 302. Upper groove; 303. Lower groove; 304. Countersunk hole; 4. Stop frame assembly; 401. Stop frame; 402. Limiting strip; 403. Support bar; 5. Fastening screws. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 5 As shown, the utility model provides a technical solution:

[0022] A laminated sodium-ion battery structure includes several upper pole pieces 1, lower pole pieces 2 and a limiting sleeve 3. The upper pole pieces 1 and the lower pole pieces 2 are arranged in an alternating stack. The upper pole piece 1 includes an upper positive pole piece 101, an upper diaphragm 102 and an upper negative pole piece 103. The upper diaphragm 102 is pressed and fixed between the upper positive pole piece 101 and the upper negative pole piece 103. The lower pole piece 2 includes a lower positive pole piece 201, a lower diaphragm 202 and a lower negative pole piece 203. The lower diaphragm 202 is pressed and fixed between the lower positive pole piece 201 and the lower diaphragm 202. The limiting sleeve 3 is sleeved on the outside of the stacked upper pole piece 1 and the lower pole piece 2. A stop bar 301 is fixedly installed inside the limiting sleeve 3. The stop bar 301 can produce a backward blocking effect on the stacked upper pole piece 1 and the lower pole piece 2. A stop frame assembly 4 for limiting the stacked upper pole piece 1 and the lower pole piece 2 is provided on one side of the limiting sleeve 3.

[0023] As a preferred implementation in this embodiment, Figure 1 and Figure 4 As shown, the block frame assembly 4 includes a block frame 401 and a limiting insert 402. The limiting insert 402 is fixedly connected to the top side of the block frame 401. The inner top surface of the limiting sleeve 3 is provided with an upper groove 302. The end of the limiting insert 402 is adapted to the upper groove 302, so that the end of the limiting insert 402 can be fitted into the upper groove 302. The block frame 401 can produce a forward blocking effect on the stacked upper pole piece 1 and the lower pole piece 2. A fastening screw 5 is threadedly connected between the limiting sleeve 3 and the limiting insert 402. The fastening screw 5 can be used to lock the limiting insert 402 on the limiting sleeve 3.

[0024] As a preferred implementation in this embodiment, Figure 1 As shown, there are two position-limiting inserts 402 , and the two position-limiting inserts 402 are symmetrically distributed.

[0025] As a preferred implementation in this embodiment, Figure 4 and Figure 5 As shown, two support bars 403 are symmetrically fixedly connected to the bottom side of the baffle frame 401, and a lower groove 303 is provided on the inner bottom surface of the limiting sleeve 3. The end of the support bar 403 is adapted to the lower groove 303, so that the end of the support bar 403 can be fitted into the lower groove 303, so that the support bar 403 can play a good supporting role for the stacked upper pole piece 1 and the lower pole piece 2.

[0026] As a preferred implementation in this embodiment, Figure 5 As shown, a countersunk hole 304 is provided on the top of the limiting sleeve 3, and the end cap of the fastening screw 5 is located in the countersunk hole 304, so that the end cap of the fastening screw 5 can be hidden and stored.

[0027] As a preferred implementation in this embodiment, Figure 2 and Figure 3 As shown, a positive electrode tab 104 is fixedly provided at one end of the upper positive electrode sheet 101 , and a negative electrode tab 204 is fixedly provided at the side of the lower positive electrode sheet 201 .

[0028] Working principle:

[0029] In the process of using the laminated sodium ion battery structure, the upper electrode 1 and the lower electrode 2 are stacked in an alternating manner, and the limiting sleeve 3 is sleeved on the outside of the stacked upper electrode 1 and the lower electrode 2. The blocking bar 301 can produce a backward blocking effect on the stacked upper electrode 1 and the lower electrode 2, and the end of the limiting insert 402 is inserted into the upper groove 302. The blocking frame 401 can produce a forward blocking effect on the stacked upper electrode 1 and the lower electrode 2, and the end of the support bar 403 is inserted into the lower groove 303, so that the support bar 403 can play a good supporting role for the stacked upper electrode 1 and the lower electrode 2. The limiting insert 402 is locked on the limiting sleeve 3 using the fastening screw 5. If part of the electrode is damaged, the fastening screw 5 is loosened, the blocking frame 401, the limiting insert 402 and the support bar 403 are pulled forward, and the damaged part of the electrode can be removed separately for replacement.

[0030] The above shows and describes the principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A laminated sodium ion battery structure, characterized in that: It comprises a plurality of upper pole pieces (1), lower pole pieces (2) and a limiting sleeve (3); The upper electrode sheet (1) and the lower electrode sheet (2) are arranged in an interlaced stack, the upper electrode sheet (1) comprising an upper positive electrode sheet (101), an upper diaphragm (102) and an upper negative electrode sheet (103), the upper diaphragm (102) being pressed and fixed between the upper positive electrode sheet (101) and the upper negative electrode sheet (103), the lower electrode sheet (2) comprising a lower positive electrode sheet (201), a lower diaphragm (202) and a lower negative electrode sheet (203), the lower diaphragm (202) being pressed and fixed between the lower positive electrode sheet (201) and the lower diaphragm (202); The limiting sleeve (3) is sleeved on the outside of the stacked upper pole piece (1) and the lower pole piece (2); a stop bar (301) is fixedly installed inside the limiting sleeve (3); and a stop frame assembly (4) for limiting the stacked upper pole piece (1) and the lower pole piece (2) is provided on one side of the limiting sleeve (3).

2. The laminated sodium ion battery structure according to claim 1, characterized in that: The stop frame assembly (4) comprises a stop frame (401) and a limiting insert (402), wherein the limiting insert (402) is fixedly connected to the top side of the stop frame (401), an upper groove (302) is provided on the inner top surface of the limiting sleeve (3), an end of the limiting insert (402) is adapted to the upper groove (302), and a fastening screw (5) is threadedly connected between the limiting sleeve (3) and the limiting insert (402).

3. The laminated sodium ion battery structure according to claim 2, characterized in that: There are two position-limiting inserts (402), and the two position-limiting inserts (402) are symmetrically distributed.

4. The laminated sodium ion battery structure according to claim 2, characterized in that: Two support bars (403) are symmetrically fixedly connected to the bottom side of the stop frame (401), and a lower groove (303) is provided on the inner bottom surface of the limiting sleeve (3), and the ends of the support bars (403) are adapted to the lower groove (303).

5. The laminated sodium ion battery structure according to claim 2, characterized in that: A countersunk hole (304) is provided on the top of the limiting sleeve (3), and the end cap of the fastening screw (5) is located in the countersunk hole (304).

6. The laminated sodium ion battery structure according to claim 1, characterized in that: A positive electrode tab (104) is fixedly provided at one end of the upper positive electrode sheet (101), and a negative electrode tab (204) is fixedly provided at the side of the lower positive electrode sheet (201).

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