Improved high-temperature battery structure

Abstract

The utility model relates to an improved high-temperature battery structure which comprises a battery shell with an opening at one end, a battery core body, a support body, electrolyte and a battery cover, the battery shell and the battery cover form an accommodating cavity, the battery core body is a roll body, and the support body is arranged in the accommodating cavity. The battery core is formed by sequentially overlapping and winding a negative electrode assembly, first isolation insulation paper, a positive electrode assembly and second isolation insulation paper, a supporting cavity is formed in the middle of the battery core, the supporting body is inserted into the supporting cavity, the positive electrode assembly is of a multi-layer sheet structure comprising a negative electrode film, and the second isolation insulation paper is of a multi-layer sheet structure comprising a negative electrode film. And the negative electrode assembly is of a multi-layer sheet body structure comprising a lithium sheet. Due to the design of the three-layer positive electrode structure, the three-layer negative electrode structure and the supporting body, the effects of increasing the effective reaction area of the lithium sheet, increasing the conductive area, preventing the pole sheet from falling off and the like can be achieved, and the purposes of stable capacity / current, large-current discharge, high-temperature resistance and safety are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high temperature battery technical field, concretely relates to an improved high temperature battery structure. BACKGROUND

[0002] A kind of high temperature battery, such as lithium sulfinyl chloride battery, it is often applied in high temperature drilling environment etc., it is a kind of primary inorganic non-aqueous electrolyte battery, it has stable voltage platform, extensive use temperature, long time storage life and does not contain any heavy metal element.The existing lithium sulfinyl chloride battery core body includes positive plate, diaphragm and metal lithium sheet.But the existing single layer positive plate structure is easy to cause limited conductive area, the problem of small discharge power;And single layer negative structure is easy to cause the phenomenon of incomplete reaction, to cause the battery to not reach rated capacity, and it will lead to the capacity / current of battery unstable, therefore, the technical personnel in the art need to interface these technical documents, simultaneously, need to further improve the battery power and capacity of lithium sulfinyl chloride battery, and the technical problem of reducing material cost. SUMMARY

[0003] To achieve the above object, the utility model provides the following technical scheme: an improved high temperature battery structure, including the battery shell of one end opening, battery core body, support body, electrolyte and battery cover, the battery shell with the battery cover forms accommodating cavity, the battery core body is roll body, by negative pole assembly, first isolation insulating paper, positive pole assembly and second isolation insulating paper are overlapped in turn and are rolled into, the support cavity is equipped in the battery core body, the support body is inserted in the support cavity, the positive pole assembly is sheet body, it is the multilayer structure including cathode film, the negative pole assembly is sheet body, it is the multilayer structure including lithium sheet, the negative pole assembly includes lithium sheet lower layer, negative pole nickel mesh interlayer and lithium sheet upper layer overlapped in turn, the lithium sheet upper layer and lithium sheet lower layer are located on the upper surface and the lower surface of negative pole nickel mesh interlayer respectively, the length of lithium sheet lower layer and lithium sheet upper layer is greater than half of negative pole nickel mesh interlayer respectively, one end portion of lithium sheet lower layer and lithium sheet upper layer is flush with the corresponding end portion of negative pole nickel mesh interlayer respectively.

[0004] Preferably, it further includes damage-proof insulating paper, the damage-proof insulating paper is square, the first isolation insulating paper and the second isolation insulating paper are folding isolation insulating paper of one-piece structure, and are folded when in use, the second isolation insulating paper is located above, and the first isolation insulating paper is located below, the damage-proof insulating paper is located on the first isolation insulating and close to the position of the crease of folding, one end of the positive pole assembly abuts the other end of the damage-proof insulating paper, and the positive pole assembly is clamped in the first isolation insulating paper and the second isolation insulating paper.

[0005] Preferably, the first isolation insulating paper, the second isolation insulating paper and the damage-proof insulating paper are all glass fiber materials.

[0006] Preferably, the support body is bent along the wide edge by a metal spring piece, wherein the four corners of the metal spring piece are rounded, and the metal spring piece is provided with a plurality of through holes.

[0007] Preferably, the positive electrode assembly comprises a cathode film upper layer, a positive electrode nickel mesh interlayer and a cathode film lower layer which are sequentially laminated, the shapes of the cathode film upper layer, the positive electrode nickel mesh interlayer and the cathode film lower layer are all square, and the positive electrode nickel mesh interlayer is provided with a lead wire.

[0008] Preferably, the lead wire is parallel to the width direction, and one end of the lead wire extends out of the cathode film, and the length of the lead wire is greater than the width of the positive electrode nickel mesh interlayer.

[0009] The utility model has the following beneficial effects:

[0010] The negative electrode assembly comprises a lithium sheet lower layer, a negative electrode nickel mesh interlayer and a lithium sheet upper layer which are sequentially laminated, the lengths of the lithium sheet lower layer and the lithium sheet upper layer are both greater than half of the negative electrode nickel mesh interlayer, and one end of the lithium sheet lower layer and the lithium sheet upper layer is flush with the corresponding end of the negative electrode nickel mesh interlayer. The negative electrode nickel mesh interlayer is mesh-shaped nickel, thereby greatly increasing the conductive contact area of the lithium sheet and the nickel wire, increasing the reaction amount and reaction speed of the lithium sheet, thereby improving the battery power and capacity of the lithium sulfonyl chloride battery. In addition, the lithium sheet lower layer, the negative electrode nickel mesh interlayer and the lithium sheet upper layer are laminated, and the lengths of the lithium sheet lower layer and the lithium sheet upper layer are both greater than half of the negative electrode nickel mesh interlayer, so that the upper and lower bottom surfaces of the middle part of the negative electrode nickel mesh interlayer are in contact with the lithium sheet, thereby greatly increasing the contact area of the middle part of the negative electrode nickel mesh interlayer and the lithium sheet. Since the inner side surface of the negative electrode assembly is in contact with the support body after winding, and the outer side surface is in contact with the inner wall of the battery shell, a large number of lithium sheets are not required to participate in the reaction, thereby saving the amount of lithium sheet. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 The utility model discloses a structure schematic diagram

[0012] Figure 2 The utility model discloses a structure schematic diagram of battery core body,

[0013] Figure 3 The utility model discloses a structure schematic diagram and structure exploded view of negative electrode assembly,

[0014] Figure 4 The utility model discloses a structure schematic diagram and structure exploded view of positive electrode assembly,

[0015] Figure 5 The utility model discloses a structure schematic diagram of support body,

[0016] Figure 6 The utility model discloses an assembling process schematic diagram of positive electrode assembly and insulator.

[0017] Explanation of reference numerals in the drawings:

[0018] Battery shell 1, battery cover 11, battery core 2, support cavity 20, support body 3, cavity 20, negative electrode assembly 21, lithium sheet lower layer 213, negative electrode nickel mesh interlayer 212, lithium sheet upper layer 211, positive electrode assembly 22, cathode film upper layer 221, positive electrode nickel mesh interlayer 222, cathode film lower layer 223, first isolation insulating paper 231, second isolation insulating paper 232, anti-damage insulating paper 24. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0020] Please refer to Figures 1-6 :

[0021] An improved high-temperature battery structure, comprising an open-ended battery shell 1, a battery core 2, a support body 3, an electrolyte and a battery cover 11, the battery shell 1 and the battery cover 11 form a containing cavity 20, the battery core 2 is a roll body, which is formed by sequentially superimposing and rolling a negative electrode assembly 21, a first isolation insulating paper 231, a positive electrode assembly 22 and a second isolation insulating paper 232, the support cavity 20 is arranged in the middle of the battery core 2, the support body 3 is inserted into the support cavity 20, the positive electrode assembly 22 is a sheet body, which is a multi-layer structure comprising a cathode film, the negative electrode assembly 21 is a sheet body, which is a multi-layer structure comprising a lithium sheet, the negative electrode assembly 21 comprises a lithium sheet lower layer 213, a negative electrode nickel mesh interlayer 212 and a lithium sheet upper layer 211 which are sequentially superimposed, the lengths of the lithium sheet lower layer 213 and the lithium sheet upper layer 211 are greater than half of the length of the negative electrode nickel mesh interlayer 212 respectively, and one end of the lithium sheet lower layer 213 and the lithium sheet upper layer 211 is flush with the corresponding end of the negative electrode nickel mesh interlayer 212. The negative electrode nickel mesh interlayer 212 is a mesh-shaped nickel, thereby greatly increasing the conductive contact area between the lithium sheet and the nickel wire, increasing the reaction amount and reaction speed of the lithium sheet, and thereby improving the battery power and capacity of the lithium sulfonyl chloride battery. In addition, the lithium sheet lower layer 213, the negative electrode nickel mesh interlayer 212 and the lithium sheet upper layer 211 are superimposed one above the other, and the lengths of the lithium sheet lower layer 213 and the lithium sheet upper layer 211 are greater than half of the length of the negative electrode nickel mesh interlayer 212 respectively, so that the middle upper and lower surfaces of the negative electrode nickel mesh interlayer 212 are in contact with the lithium sheet, thereby greatly increasing the contact area between the negative electrode nickel mesh interlayer 212 and the middle of the lithium sheet. Since the inner side of the negative electrode assembly 21 after rolling is in contact with the support body 3, and the outer side is in contact with the inner wall of the battery shell 1, therefore, a large number of lithium sheets are not required to participate in the reaction, thereby saving the amount of lithium sheet used.

[0022] In this embodiment, as preferred, the damage-proof insulating paper 24 is square, the first and second isolation insulating papers 231 and 232 are folding isolation insulating papers in one-piece structure, and in use, the folding isolation insulating papers are folded, the second isolation insulating paper 232 is on the upper side, and the first isolation insulating paper 231 is on the lower side. The damage-proof insulating paper 24 is arranged on the first isolation insulating paper and close to the folding crease. One end of the positive electrode assembly 22 abuts against the other end of the damage-proof insulating paper 24, and the positive electrode assembly 22 is clamped between the second isolation insulating paper 232 and the first isolation insulating paper 231. In order to prevent the positive electrode assembly 22 from being damaged in the installation of the folding isolation insulating paper, the nickel mesh side of the positive electrode assembly 22 cuts or punctures the folding isolation insulating paper at the folding position, directly contacts the battery shell 1, and causes internal short circuit. Therefore, the damage-proof insulating paper 24 is arranged at the folding crease of the folding isolation insulating paper.

[0023] In this embodiment, as preferred, the first isolation insulating paper 231, the second isolation insulating paper 232, and the damage-proof insulating paper 24 are all made of glass fiber material.

[0024] In this embodiment, as preferred, the support body 3 is made of a metal spring piece which is bent along the wide side. The four corners of the metal spring piece are rounded, and the metal spring piece is provided with a plurality of through holes. The metal spring piece is provided with the plurality of through holes to facilitate the electrolyte to quickly fill the cavity 20 when the electrolyte is poured, and to facilitate the electrolyte to flow freely and completely contact and react with the lithium sheet. In addition, the overall mass of the battery can be reduced, and the energy density can be improved.

[0025] In this embodiment, as preferred, the positive electrode assembly 22 includes the upper cathode film layer 221, the nickel mesh clamping layer, and the lower cathode film layer 223 which are sequentially stacked. The shapes of the upper cathode film layer 221, the positive electrode nickel mesh clamping layer 222, and the lower cathode film layer 223 are all square. The positive electrode nickel mesh clamping layer 222 is provided with a lead wire.

[0026] In this embodiment, as preferred, the lead wire is parallel to the width direction, and one end of the lead wire extends out of the cathode film. The length of the lead wire is greater than the width of the positive electrode nickel mesh clamping layer 222.

[0027] In order to produce the improved high-temperature battery structure, the following production process is used, which includes the following steps:

[0028] Step 1: Assemble the positive electrode assembly 22. Step 1 is to assemble the positive electrode assembly 22 with the lower layer being the cathode film, the middle layer being the nickel mesh, and the upper layer being the cathode film.

[0029] Step 2: Assemble the negative electrode assembly 21; Step 2 completes the assembly of the negative electrode assembly 21 with the lower layer being a lithium sheet, the middle layer being a nickel mesh, and the upper layer being a lithium sheet, wherein the upper layer of lithium sheet serves as the upper lithium sheet layer and the lower layer of lithium sheet serves as the lower lithium sheet layer, which are respectively arranged on the upper surface and the lower surface of the negative electrode nickel mesh interlayer, and one end of the lower lithium sheet layer and the upper lithium sheet layer is flush with the corresponding end of the negative electrode nickel mesh interlayer;

[0030] Step 3: Assemble the battery core 2; Step 3 first clamps the positive electrode assembly 22 in the folded isolation paper, and arranges the anti-damage insulation paper 24 between the fold of the folded isolation paper and the positive electrode assembly 22, then the combination of the positive electrode assembly 22 and the folded isolation paper is stacked on the negative electrode assembly 21, and then the combination is wound to form a roll body with a support cavity 20 in the middle;

[0031] Step 4: Assemble the support body 3; Step 4 completes the insertion of the support body 3 into the support cavity 20 of the roll body of Step 3;

[0032] Step 5: Weld and fix the battery core 2 to the inner wall of the battery shell 1,

[0033] Step 6: Fix the battery shell 1 with a cover;

[0034] Step 7: Fill the electrolyte;

[0035] Step 8: Dry.

[0036] The specific steps of Step 1, Step 2, and Step 3 are as follows:

[0037] Step 1: Assemble the positive electrode assembly 22; take a piece of cathode film as the lower cathode film layer 223 and place it on the first workbench, take a piece of nickel mesh as the positive electrode nickel mesh interlayer 222 and place it on the second workbench, dip the brush in the adhesive container, then brush the surface of the positive electrode nickel mesh interlayer 222 with the brush, after brushing, turn over the positive electrode nickel mesh interlayer 222 and stack it on the cathode film, then dip the brush in the adhesive container again, and brush the surface of the positive electrode nickel mesh interlayer 222 with the brush. Finally, take another piece of cathode film as the upper cathode film layer 221 and stack it on the upper surface of the positive electrode nickel mesh interlayer 222 to complete the assembly of the positive electrode assembly 22.

[0038] Step 2: Assemble the negative electrode assembly 21; take a double-layer lithium sheet, separate the double-layer lithium sheet, and lay it flat on the third workbench, then take another piece of nickel mesh as the negative electrode nickel mesh interlayer 212 and place it under the lower lithium sheet. This arrangement can improve production efficiency; then, take the lower lithium sheet as the lower lithium sheet layer 213 and align the left wide edge of the lower lithium sheet with the left wide edge of the negative electrode nickel mesh interlayer 212,

[0039] Then the lithium sheet lower layer 213 is superimposed on the upper surface of the negative nickel mesh interlayer 212, and then the combination of the negative nickel mesh interlayer 212 and the lithium sheet lower layer 213 is turned over by 180 degrees in the horizontal direction, at this time, the lithium sheet lower layer 213 is located at the right lower bottom surface of the negative nickel mesh interlayer 212, then the upper lithium sheet is taken out and used as the lithium sheet upper layer 211, the left wide edge of the lithium sheet upper layer 211 is aligned with the wide edge of the left side of the negative nickel mesh interlayer 212, then superimposed, and finally the lithium sheet upper layer 211 and the negative nickel mesh interlayer 212 are compacted with a compaction hammer. In this way, the lithium sheet upper layer 211 and the lithium sheet lower layer 213 are respectively located at the upper and lower ends of the negative nickel mesh interlayer 212, the assembly of the negative assembly 21 is completed, and the assembly steps of the negative assembly can improve the production efficiency.

[0040] Step 3: assembly of the battery core 2,

[0041] Take a temporary winding rod and place it at one end of the negative assembly 21, and wind the negative assembly 21 one to two turns through the temporary winding rod,

[0042] Then take a piece of isolation fiber paper and fold it into two layers, with the lower layer as the first isolation insulation paper 231 and the upper layer as the second isolation insulation paper 232. Then, one end of the damage-proof insulation paper 24 is abutted against the fold of the folded isolation insulation paper, and one end of the positive assembly 22 is abutted against the other end of the damage-proof insulation paper 24. Then, the second isolation insulation paper 232 is superimposed on the positive assembly 22, thereby forming the positive assembly 22 isolation body. Then, the positive assembly 22 isolation body is superimposed on the surface of the negative assembly 21, and the outer fold of the positive assembly 22 isolation body is abutted against the wound end of the negative assembly 21. Then, the cathode assembly isolation body and the anode assembly are wound into the battery core 2 through the temporary winding rod. Finally, the temporary winding rod is taken out, so that the support cavity 20 exists in the middle of the battery core 2.

[0043] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. An improved high temperature battery structure, characterized by, The battery includes an open-ended battery shell, a battery core, a support body, an electrolyte and a battery cover. The battery shell and the battery cover form a containing cavity. The battery core is a roll body formed by sequentially stacking and rolling a negative electrode assembly, a first isolation paper, a positive electrode assembly and a second isolation paper. A support cavity is arranged in the middle of the battery core. The support body is inserted into the support cavity. The positive electrode assembly is a sheet body having a multi-layer structure including a cathode film. The negative electrode assembly is a sheet body having a multi-layer structure including a lithium sheet. The negative electrode assembly includes a lower lithium sheet layer, a negative electrode nickel mesh interlayer and an upper lithium sheet layer which are sequentially stacked. The upper and lower lithium sheet layers are arranged on the upper and lower surfaces of the negative electrode nickel mesh interlayer, respectively. The lengths of the upper and lower lithium sheet layers are greater than half the length of the negative electrode nickel mesh interlayer. One end of each of the upper and lower lithium sheet layers is flush with the corresponding end of the negative electrode nickel mesh interlayer.

2. The improved high temperature battery structure of claim 1, wherein, The battery further includes a damage-proof isolation paper which is square. The first and second isolation papers are folding isolation papers having an integrated structure. In use, the second isolation paper is located above the first isolation paper. The damage-proof isolation paper is arranged on the first isolation paper and close to the folding crease. One end of the positive electrode assembly abuts the other end of the damage-proof isolation paper. The positive electrode assembly is arranged between the second and first isolation papers.

3. The improved high temperature battery structure of claim 2, wherein, The first and second isolation papers and the damage-proof isolation paper are all made of glass fiber.

4. The improved high temperature battery structure of claim 1, wherein, The support body is formed by bending a metal spring along the wide edge. The four corners of the metal spring are rounded. The metal spring is provided with a plurality of through holes.

5. The improved high temperature battery structure of claim 1, wherein, The positive electrode assembly includes a cathode film upper layer, a positive electrode nickel mesh interlayer and a cathode film lower layer which are sequentially stacked. The positive electrode nickel mesh interlayer is provided with a lead wire.

6. The improved high temperature battery structure of claim 5, wherein, The lead wire is parallel to the width direction. One end of the lead wire extends out of the cathode film. The length of the lead wire is greater than the width of the positive electrode nickel mesh interlayer.

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