Ceramic cover plate structure of lithium ion battery

Abstract

The utility model belongs to the technical field of ceramic cover plates of lithium ion batteries, and particularly relates to a ceramic cover plate structure of a lithium ion battery, which comprises a cover plate body, an anti-explosion hole, a liquid injection hole and two grooves, and the anti-explosion hole, the liquid injection hole and the two grooves are arranged on the surface of the cover plate body. The utility model relates to a lithium ion battery, which comprises two grooves, a positive pole and a negative pole respectively penetrate through the inner sides of the two grooves, four positioning bumps are arranged at the bottoms of the inner sides of the two grooves, ceramic rings are arranged on the inner sides of the two grooves, and four positioning grooves are arranged at the bottoms of the ceramic rings. When the ceramic ring is embedded into the groove, the positioning convex block on the inner side of the positioning groove is embedded into the positioning groove in the bottom of the ceramic ring, so that the assembling convenience and the positioning accuracy between the cover plate body and the ceramic ring can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of lithium ion battery ceramic cover plate, and specifically relates to a lithium ion battery ceramic cover plate structure. BACKGROUND

[0002] The lithium ion battery ceramic cover plate structure is a cover plate assembly specially designed for lithium ion batteries, which combines the high performance of ceramic materials and the stability of metal materials such as stainless steel to improve the safety and service life of the battery.

[0003] At present, the existing lithium ion battery ceramic cover plate is usually sealed and insulated between electrode terminals through a ceramic ring in the process of use, but the ceramic ring on the traditional lithium ion battery ceramic cover plate usually does not have a positioning structure, so that inaccurate installation positioning may occur during assembly, thereby reducing stability. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a lithium ion battery ceramic cover plate structure, and aims at solving the problem that the existing lithium ion battery ceramic cover plate is usually sealed and insulated between electrode terminals through a ceramic ring in the process of use, but the ceramic ring on the traditional lithium ion battery ceramic cover plate usually does not have a positioning structure, so that inaccurate installation positioning may occur during assembly, thereby reducing stability.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a lithium ion battery ceramic cover plate structure, including the cover plate body, the surface of the cover plate body is provided with the explosion -proof hole, the surface of the cover plate body is provided with the liquid injection hole, the surface of the cover plate body is provided with two recesses;

[0006] The inner side of two recesses is respectively penetrated by the positive pole column and the negative pole column, the inner side bottom of two recesses is provided with four positioning protrusions, the inner side of two recesses is provided with the ceramic ring, and the bottom of the ceramic ring is provided with four positioning recesses.

[0007] As a lithium ion battery ceramic cover plate structure of the utility model, four positioning protrusions and four positioning recesses are annularly distributed.

[0008] As a lithium ion battery ceramic cover plate structure of the utility model, the size between the positioning recess and the limiting block is matched.

[0009] As a lithium ion battery ceramic cover plate structure of the utility model, the top of the recess is provided with a chamfer, and the top outer wall of the ceramic ring is sleeved with a sealing ring.

[0010] The sealing ring is located at the inner side of the chamfer.

[0011] The inner wall of the sealing ring is provided with a limiting block, and the top of the ceramic ring is provided with a limiting slot.

[0012] The size between the limiting slot and the limiting block is matched.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] Through the setting of the positioning convex block and the positioning recess, when the ceramic ring is embedded into the recess, the positioning convex block in the inner side of the positioning recess is embedded into the positioning recess at the bottom of the ceramic ring, so that the assembly convenience and the positioning accuracy between the cover plate body and the ceramic ring can be improved.

[0015] Through the setting of the chamfer and the sealing ring in the chamfer, the gap between the ceramic ring and the cover plate body is filled by the sealing ring, the limiting block is embedded into the limiting slot for positioning, and then the gap between the sealing ring and the cover plate body is welded, so that the sealing effect between the cover plate body and the ceramic ring can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings are used to provide further understanding of the utility model and constitute a part of the specification, are used to explain the utility model together with the embodiments of the utility model, and do not constitute the limitation to the utility model. In the drawings:

[0017] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0018] Figure 2 It is the three-dimensional exploded structure schematic diagram of the utility model;

[0019] Figure 3 It is the three-dimensional bottom view structure schematic diagram of the utility model;

[0020] Figure 4 It is the main view cross section structure schematic diagram of the utility model;

[0021] Figure 5 It is the A amplification structure schematic diagram of the utility model.

[0022] In the drawing: 1, cover plate body; 2, explosion-proof hole; 3, liquid injection hole; 4, recess; 5, positive pole; 6, negative pole; 7, positioning convex block; 8, ceramic ring; 9, positioning recess; 10, chamfer; 11, sealing ring; 12, limiting block; 13, limiting slot. DETAILED DESCRIPTION

[0023] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Please refer to Figures 1-5 The utility model provides the following technical scheme: a kind of lithium ion battery ceramic cover plate structure, including cover plate body 1, the surface of cover plate body 1 is provided with explosion vent 2, the surface of cover plate body 1 is provided with liquid injection hole 3, two recesses 4 are set in the surface of cover plate body 1;

[0025] The inside of two recesses 4 is respectively penetrated by positive pole 5 and negative pole 6, the inside bottom of two recesses 4 is provided with four positioning lugs 7, the inside of two recesses 4 is provided with ceramic ring 8, the bottom of ceramic ring 8 is provided with four positioning recesses 9;

[0026] It is worth noting that lithium ion battery ceramic cover plate is a key component in lithium ion battery packaging structure, it is located at the top of battery, mainly assumes multiple functions to ensure the safety and performance of battery, by its sealing structure, effectively prevent external moisture, dust and other pollutants from entering the inside of battery, so as to protect the electrolyte and other sensitive components inside the battery from being damaged.

[0027] Preferably: four positioning lugs 7 and four positioning recesses 9 are annularly distributed, the size between positioning recess 9 and limiting block 12 is matched.

[0028] Specific use, through the setting of positioning lug 7 and positioning recess 9, when ceramic ring 8 is embedded in recess 4, by embedding positioning lug 7 in the inside of positioning recess 9 into the bottom of ceramic ring 8 positioning recess 9, so as to improve the assembly convenience and positioning accuracy between cover plate body 1 and ceramic ring 8.

[0029] Preferably: the top of recess 4 is provided with chamfer 10, the top outer wall of ceramic ring 8 is sleeved with sealing ring 11, sealing ring 11 is located in the inside of chamfer 10, the inner wall of sealing ring 11 is provided with limiting block 12, the top of ceramic ring 8 is provided with limiting groove 13, the size between limiting groove 13 and limiting block 12 is matched.

[0030] In specific use, the chamfer 10 is arranged, the sealing ring 11 is arranged in the chamfer 10, the sealing ring 11 is used to fill the gap between the ceramic ring 8 and the cover plate body 1, the limiting block 12 is embedded in the limiting groove 13 to be positioned, then the gap between the sealing ring 11 and the cover plate body 1 is welded, so that the sealing effect between the cover plate body 1 and the ceramic ring 8 can be improved;

[0031] It should be noted that after the cover plate body 1 and the sealing ring 11 are welded, the ceramic ring 8 in the groove 4 can be fixed.

[0032] Working principle: first, the positioning protrusion 7 on the inner side of the positioning groove 9 is embedded in the positioning groove 9 at the bottom of the ceramic ring 8, at this time the ceramic ring 8 is stably assembled in the positioning groove 9, the chamfer 10 is arranged, the sealing ring 11 is arranged in the chamfer 10, the sealing ring 11 is used to fill the gap between the ceramic ring 8 and the cover plate body 1, the limiting block 12 is embedded in the limiting groove 13 to be positioned, then the gap between the sealing ring 11 and the cover plate body 1 is welded, so that the sealing effect between the cover plate body 1 and the ceramic ring 8 can be improved, finally the positive pole 5 and the negative pole 6 are penetrated through the inner side of the ceramic ring 8, and are welded and fixed after extending to the other side through the cover plate body 1.

[0033] Finally, it should be pointed out that: the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical scheme recorded in the foregoing embodiments can still be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A lithium-ion battery ceramic cover plate structure comprising a cover plate body (1), characterized in that: The surface of the cover plate body (1) is provided with explosion-proof holes (2), the surface of the cover plate body (1) is provided with liquid injection holes (3), and the surface of the cover plate body (1) is provided with two grooves (4); The inner sides of the two grooves (4) are respectively penetrated by positive poles (5) and negative poles (6), the inner sides of the two grooves (4) are provided with four positioning protrusions (7), the inner sides of the two grooves (4) are provided with ceramic rings (8), and the bottoms of the ceramic rings (8) are provided with four positioning grooves (9).

2. The ceramic cover plate structure for lithium-ion battery according to claim 1, wherein: The four positioning protrusions (7) and the four positioning grooves (9) are annularly distributed.

3. The ceramic cover plate structure for lithium-ion battery of claim 1, wherein: The size between the positioning groove (9) and the limiting block (12) is matched.

4. The ceramic cover plate structure for lithium-ion battery of claim 1, wherein: The top of the groove (4) is provided with a chamfer (10), and the top outer wall of the ceramic ring (8) is sleeved with a sealing ring (11).

5. The ceramic cover plate structure for lithium-ion battery of claim 4, wherein: The sealing ring (11) is located on the inner side of the chamfer (10).

6. The ceramic cover plate structure of lithium ion battery according to claim 4, characterized in that: The inner wall of the sealing ring (11) is provided with a limiting block (12), and the top of the ceramic ring (8) is provided with a limiting groove (13).

7. The ceramic cover plate structure of lithium-ion battery according to claim 6, characterized in that: The size between the limiting groove (13) and the limiting block (12) is matched.

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