Heat-resistant assembled lithium battery cap

Abstract

The utility model discloses a heat-resistant assembled lithium battery cap, and relates to the related technical field of lithium batteries. The cap comprises a cap body, an installation disc, a fixing disc and a heat insulation disc, an annular reed is fixed to the middle of the inner wall of the cap body, the installation disc is arranged in the portion, below the annular reed, of the cap body, a third sealing ring is fixed to the edge of the top end of the installation disc, and the fixing disc is vertically fixed in the installation disc in a penetrating mode. A one-way air valve is vertically fixed in the fixing disc in a penetrating mode, and a heat insulation disc is arranged at the top end of the fixing disc. Through the arrangement of the cap main body, the mounting disc, the fixed disc and the heat insulation disc, the problems that the sealing effect is not good enough after the lithium battery cap is combined during working, and the rubber in the cap becomes soft and the sealing effect of the cap is influenced due to the fact that the heat generated by a battery is directly transferred to the cap are solved; the lithium battery cap has the advantages that the lithium battery cap is better in sealing performance, heat is separated, and the sealing performance is better.

Description

Technical Field

[0001] The utility model belongs to the technical field related to lithium batteries, and particularly relates to a heat-resistant assembled lithium battery cap. Background Art

[0002] The battery cap is an important part of the battery. It is mainly used to provide the battery's sealing function to prevent the leakage of the electrolyte inside the battery. It also acts as a safety valve. When the internal pressure of the battery is too high, the safety valve on the cap will open to release the internal pressure and prevent the battery from exploding. There are many types of battery caps, including alkaline batteries, lead-acid batteries and lithium batteries. Among them, the cap of the lithium battery is more complicated, usually including the top cover, safety valve and bottom cover. The top cover and the bottom cover respectively act as the positive conductive terminal and the sealed positive terminal of the battery, while the safety valve is used to remove high-pressure gas to prevent the internal pressure of the battery from being too high. However, it still has the following disadvantages in actual use:

[0003] 1. When the lithium battery cap is working, the battery cap is directly assembled and installed, but when working, the cap and the components are assembled and installed, which may cause the sealing to be not good enough and affect the safety of battery use;

[0004] 2. When the lithium battery cap is working, the cap and its components are usually fully mixed with the battery. When working, the heat inside the battery is directly transferred to the cap, causing the rubber in the cap to soften and affecting the sealing effect of the cap. Utility Model Content

[0005] The utility model aims to provide a heat-resistant assembled lithium battery cap. By arranging a cap body, a mounting plate, a fixing plate and a heat insulating plate, the utility model solves the problem that the sealing effect of the lithium battery cap is not good enough after being assembled during operation, and the heat generated by the battery is directly transferred to the cap, causing the rubber in the cap to soften, thereby affecting the sealing effect of the cap.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a heat-resistant assembled lithium battery cap, comprising a cap body, a mounting plate, a fixing plate and a heat-insulating plate, an annular spring sheet is fixed to the middle of the inner wall of the cap body, a mounting plate is arranged in the cap body below the annular spring sheet, a sealing ring three is fixed at the edge of the top of the mounting plate, a fixing plate is fixed vertically through the mounting plate, a one-way air valve is fixed vertically through the fixing plate, and a heat-insulating plate is arranged on the top of the fixing plate. When working, the mounting plate is installed in the cap body through the cap body, the fixing plate is fixed in the cap body through the mounting plate, the one-way air valve is fixed in the cap body through the fixing plate, and the heat of the battery during working is separated from the cap body and the mounting plate through the heat-insulating plate, thereby increasing the heat resistance of the cap body.

[0008] Furthermore, a sealing ring 1 is fixed at the inner ring edge of the bottom end of the annular spring, the sealing ring 1 abuts against the mounting disk, the sealing ring 3 and the sealing ring 1 are sleeved with each other, the top end of the sealing ring 3 abuts against the bottom end of the annular spring, and when the annular spring is working, the gap between the annular spring and the mounting disk is closed by the cooperation of the sealing ring 3 and the sealing ring 1.

[0009] Furthermore, a sealing ring 2 is fixed to the inner bottom of the cap body, the outer diameter of the sealing ring 2 is smaller than the inner diameter of the annular spring, a sealing sheet is fixed to the top of the sealing ring 2, and the sealing sheet abuts against the bottom end of the mounting disk. When the cap body is working, the gap between the mounting disk and the cap body is closed by the sealing ring 2 and the sealing sheet.

[0010] Furthermore, a fixing opening is fixed through the installation disk, the fixing disk is fixed through the fixing opening, the top of the fixing disk is flush with the top of the installation disk, and when the installation disk is working, the fixing disk is fixed through the fixing opening.

[0011] Furthermore, a movable hole is opened in the center of the bottom end of the cap body, the one-way air valve extends out of the bottom end of the cap body, and the one-way air valve is movably connected in the movable hole. When the cap body is working, the one-way air valve is movably connected through the movable hole.

[0012] Furthermore, the bottom end of the insulation disk is fixed with fixing columns in a circular array, the bottom ends of the fixing columns are all fixed on the top surface of the mounting disk, the diameter of the insulation disk is smaller than the diameter of the annular spring, and the insulation disk is supported on the mounting disk by the fixing columns.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model solves the problem that the sealing effect of the lithium battery cap is not good enough after being assembled during work by providing a cap body, a mounting plate and a fixing plate. The cap body is arranged on a fixture by adsorbing the heat insulation plate with a suction cup, and then the heat insulation plate is driven downward so that the mounting plate is pressed onto the annular spring sheet until the annular spring sheet rebounds. At this time, the mounting plate and the sealing sheet on the sealing ring 2 abut against each other, and the gap between the mounting plate and the sealing ring 2 is closed. The sealing ring 1 abuts against the mounting plate, and the sealing ring 3 abuts against the annular spring sheet, so that the mounting plate and the annular spring sheet are abutted and tightened, the gap between the mounting plate and the annular spring sheet is closed, and the sealing ring 1 and the sealing ring 3 are tightened to each other, thereby increasing the sealing effect between the mounting plate and the annular spring sheet, so that the lithium battery cap has a better sealing effect after being assembled during work.

[0015] 2. The utility model solves the problem that the heat generated by the battery is directly transferred to the cap, causing the rubber in the cap to soften and affecting the sealing effect of the cap by providing a cap body, a mounting plate and a heat insulation plate. When the heat insulation plate is working, it is fixed to the top of the mounting plate by a fixing column. When the battery is in operation, the heat generated by the battery is separated by the heat insulation plate, and the heat insulation plate and the mounting plate are separated by the fixing column to prevent the sealing effect between the mounting plate and the cap body from being damaged. When working, the influence of the battery heating on the sealing effect of the cap is reduced, and the heat resistance of the battery cap is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a three-dimensional diagram of the cross-sectional structure of a heat-resistant assembled lithium battery cap;

[0018] Figure 2 It is a three-dimensional diagram of the main structure of the cap;

[0019] Figure 3 It is a three-dimensional diagram of the installation plate structure;

[0020] Figure 4 It is a three-dimensional diagram of the fixed disk structure;

[0021] Figure 5 It is a three-dimensional diagram of the insulation plate structure.

[0022] Reference numerals:

[0023] 1. Cap body; 101. Annular spring; 102. Sealing ring 1; 103. Sealing ring 2; 104. Sealing sheet; 105. Movable hole; 2. Mounting plate; 201. Fixing port; 202. Sealing ring 3; 3. Fixing plate; 301. One-way air valve; 4. Heat insulation plate; 401. Fixing column. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment 1

[0026] See also Figure 1-4 The utility model is a heat-resistant assembled lithium battery cap, comprising a cap body 1, a mounting plate 2, a fixing plate 3 and a heat-insulating plate 4. An annular spring sheet 101 is fixed to the middle of the inner wall of the cap body 1. When the cap body 1 is working, the mounting plate 2 is pressed by the annular spring sheet 101. A mounting plate 2 is arranged in the cap body 1 below the annular spring sheet 101. The fixing plate 3 is fixed therein by the mounting plate 2. A sealing ring 3 202 is fixed to the edge of the top of the mounting plate 2. The sealing ring 3 202 and the sealing ring 2 103 cooperate with each other to seal the gap between the cap body 1 and the mounting disk 2, a fixing disk 3 is vertically fixed in the mounting disk 2, a one-way air valve 301 is fixed therein, a one-way air valve 301 is vertically fixed in the fixing disk 3, the gas generated during the operation of the battery is discharged through the one-way air valve 301 to prevent the internal pressure of the battery from being too high and causing expansion, and an insulation disk 4 is arranged on the top of the fixing disk 3, and the high temperature inside the battery is separated from the cap body 1 when the insulation disk 4 is working.

[0027] Specifically, a sealing ring 102 is fixed at the inner ring edge of the bottom end of the annular spring 101, the sealing ring 102 and the mounting disk 2 are in contact with each other, the sealing ring 3 202 and the sealing ring 102 are sleeved with each other, and the top of the sealing ring 3 202 is in contact with the bottom end of the annular spring 101. When the annular spring 101 is working, the sealing ring 102 cooperates with the sealing ring 3 202 through the sealing ring 102, so that the gap between the mounting disk 2 and the annular spring 101 is closed during work.

[0028] Furthermore, a sealing ring 103 is fixed to the inner bottom of the cap body 1, and the outer diameter of the sealing ring 103 is smaller than the inner diameter of the annular spring 101. A sealing sheet 104 is fixed to the top of the sealing ring 103, and the sealing sheet 104 abuts against the bottom end of the mounting disk 2. When the cap body 1 is working, the sealing ring 103 and the sealing sheet 104 at the top cooperate, and the top end of the sealing sheet 104 abuts against the bottom end of the mounting disk 2, so that the gap between the bottom end of the mounting disk 2 and the cap body 1 is further sealed during operation.

[0029] Furthermore, a fixing opening 201 is fixed through the mounting plate 2 , and the fixing plate 3 is fixed through the fixing opening 201 . The top of the fixing plate 3 is flush with the top of the mounting plate 2 . When the mounting plate 2 is working, the fixing opening 201 is used to fix the fixing plate 3 .

[0030] Furthermore, a movable hole 105 is opened through the center of the bottom end of the cap body 1, and the one-way air valve 301 extends through the bottom end of the cap body 1. The one-way air valve 301 is movably connected in the movable hole 105, and the cap body 1 is movably connected to the one-way air valve 301 through the movable hole 105.

[0031] The operation process of this embodiment is as follows: when working, the cap body 1 is set on the fixture by adsorbing the insulation disk 4 with a suction cup, and then the insulation disk 4 is driven downward so that the mounting disk 2 is pressed onto the annular spring 101 until the annular spring 101 rebounds. At this time, the mounting disk 2 and the sealing sheet 104 on the sealing ring 2 103 abut against each other, and the gap between the mounting disk 2 and the sealing ring 2 103 is closed, and the sealing ring 102 abuts on the mounting disk 2, and the sealing ring 3 202 abuts on the annular spring 101, so that the mounting disk 2 and the annular spring 101 are abutted and tightened, the gap between the mounting disk 2 and the annular spring 101 is closed, and the sealing ring 102 and the sealing ring 3 202 are tightened to each other, thereby increasing the sealing effect between the mounting disk 2 and the annular spring 101, and at the same time, the one-way air valve 301 in the fixed disk 3 enters the movable hole 105 to complete the installation. Specific embodiment 2

[0033] See also Figure 1 , 2 , 3, 5, on the basis of the specific embodiment 1, the bottom end of the insulation disk 4 is fixed with fixing columns 401 in a circular array, and the bottom ends of the fixing columns 401 are all fixed on the top surface of the mounting disk 2. The diameter of the insulation disk 4 is smaller than the diameter of the annular spring 101. When the insulation disk 4 is working, it is fixed to the top of the mounting disk 2 by the fixing columns 401. When the battery is in operation, the heat generated by the battery is separated by the insulation disk 4, and the insulation disk 4 is separated from the mounting disk 2 by the fixing columns 401 to prevent the sealing effect between the mounting disk 2 and the cap body 1 from being damaged.

[0034] The operation process of this embodiment is as follows: when the heat insulation disk 4 is working, it is fixed to the top of the mounting disk 2 by the fixing column 401. When the battery is in operation, the heat generated by the battery is isolated by the heat insulation disk 4, and the heat insulation disk 4 is separated from the mounting disk 2 by the fixing column 401 to prevent the sealing effect between the mounting disk 2 and the cap body 1 from being damaged.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A heat-resistant assembled lithium battery cap, comprising a cap body (1), a mounting plate (2), a fixing plate (3) and a heat-insulating plate (4), characterized in that: An annular spring sheet (101) is fixed to the middle of the inner wall of the cap body (1); a mounting plate (2) is arranged in the cap body (1) below the annular spring sheet (101); a sealing ring (202) is fixed at the edge of the top of the mounting plate (2); a fixing plate (3) is fixed vertically through the mounting plate (2); a one-way air valve (301) is fixed vertically through the fixing plate (3); and a heat insulation plate (4) is arranged at the top of the fixing plate (3).

2. The heat-resistant assembled lithium battery cap according to claim 1, characterized in that: A sealing ring 1 (102) is fixed at the inner ring edge of the bottom end of the annular spring sheet (101), the sealing ring 1 (102) and the mounting plate (2) are in mutual contact, the sealing ring 3 (202) and the sealing ring 1 (102) are mutually sleeved, and the top end of the sealing ring 3 (202) is in mutual contact with the bottom end of the annular spring sheet (101).

3. The heat-resistant assembled lithium battery cap according to claim 1, characterized in that: A second sealing ring (103) is fixed to the inner bottom of the cap body (1), the outer diameter of the second sealing ring (103) being smaller than the inner diameter of the annular spring sheet (101), and a sealing sheet (104) is fixed to the top of the second sealing ring (103), the sealing sheet (104) being in contact with the bottom end of the mounting plate (2).

4. The heat-resistant assembled lithium battery cap according to claim 1, characterized in that: A fixing opening (201) is fixedly passed through the installation plate (2), and the fixing plate (3) is fixedly passed through the fixing opening (201), with the top end of the fixing plate (3) being flush with the top end of the installation plate (2).

5. The heat-resistant assembled lithium battery cap according to claim 1, characterized in that: A movable hole (105) is provided in the center of the bottom end of the cap body (1), the one-way air valve (301) extends through the bottom end of the cap body (1), and the one-way air valve (301) is movably connected in the movable hole (105).

6. The heat-resistant assembled lithium battery cap according to claim 1, characterized in that: The bottom end of the heat insulation disk (4) is fixed with fixing columns (401) in a circular array, and the bottom ends of the fixing columns (401) are all fixed on the top surface of the mounting disk (2). The diameter of the heat insulation disk (4) is smaller than the diameter of the annular spring sheet (101).

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