Lithium ion battery top cover

Abstract

The utility model belongs to the technical field of new energy lithium ion batteries, and particularly relates to a lithium ion battery top cover which comprises a top cover plate, the device is characterized in that the surface of the top cover plate is fixedly connected with an annular base; the annular base penetrates through the top cover plate; the top of the annular base is connected with a first cover plate; the inner side wall of the annular base is connected with a sealing gasket; the top of the sealing gasket is connected with a cooling box; the cooling box is hollow in the middle; the top of the cooling box is connected with a second cover plate; a water injection opening is formed in the top of the second cover plate; the bottom of the cooling box is fixedly connected with a sleeve; the middle part of the sleeve is fixedly connected with a conductive column; the conductive column penetrates through the first cover plate; the cooling box is arranged at the mounting position of the conductive column, so that heat generated during charging and discharging of the conductive column can be reduced, the temperature of the conductive column is maintained, the battery is more stable in the use process, and the battery is prevented from being heated to explode and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to new energy lithium ion battery technical field, specifically a kind of lithium ion battery top cover. BACKGROUND

[0002] Lithium ion battery top cover plate is as a kind of directly covered on lithium battery positive and negative pole with protective object, lithium ion battery top cover plate is widely used in electronic product and new energy field industrial equipment.

[0003] At present, lithium ion battery top cover plate in prior art is mainly fixed by laser welding, realizes the wrapping and sealing of bare cell, ensures the closed nature of battery interior, and the pole is provided on lithium ion battery top cover plate, these pole is connected with the pole lug of cell by welding, to ensure the smooth flow of current during the charging and discharging process of cell.

[0004] In prior art, the pole of lithium ion battery top cover plate generates internal resistance during the charging and discharging process, and when the internal resistance is too large, it can cause battery heating, and then cause the heating of pole, the heating of pole can affect the stability of battery, shorten the service life of battery, affect the performance of battery, etc., therefore, aiming at the above problems, a kind of lithium ion battery top cover is provided. UTILITY MODEL CONTENTS

[0005] In order to make up for the deficiency of prior art, the utility model provides a kind of lithium ion battery top cover.

[0006] The utility model discloses a kind of lithium ion battery top cover, including top cover plate;Its characterized in that: annular base is fixedly connected on the surface of the top cover plate;The annular base is set through top cover plate;First cover plate is connected to the top of the annular base;Sealing gasket is connected to the inner wall of the annular base;Cooling box is connected to the top of the sealing gasket;The cooling box is hollow in the middle and is set;Second cover plate is connected to the top of the cooling box;Water inlet is formed in the top of the second cover plate;Sleeve is fixedly connected to the bottom of the cooling box;Conductive column is fixedly connected to the middle of the sleeve;The conductive column is through to first cover plate.

[0007] Preferably, the bottom of the top cover plate is fixedly connected with a bellow, the bellow is provided with an air outlet around, the top of the bellow is fixedly connected with a box cover, the top of the box cover is fixedly connected with a mounting seat, and the top of the mounting seat is fixedly connected with a pressure relief cover.

[0008] Preferably, the inner wall of the bellow is fixedly connected with a liquid injection tank, the bottom of the liquid injection tank is fixedly connected with a liquid injection pipe, the liquid injection pipe is provided in an S shape, the top of the liquid injection tank is fixedly connected with a third cover plate, the top of the third cover plate is provided with a liquid injection hole, and the top of the liquid injection hole is fixedly connected with a hole cover.

[0009] Preferably, the top cap plate top is fixed with a first positive electrode assembly; the top cap plate top is fixed with a second positive electrode assembly; the top cap plate top is fixed with a first negative electrode assembly; the top cap plate top is fixed with a second negative electrode assembly; the first positive electrode assembly, the second positive electrode assembly and the first negative electrode assembly, the second negative electrode assembly are symmetrically arranged.

[0010] Preferably, the top cap plate top is fixed with a first explosion-proof sheet; the top cap plate top is fixed with a second explosion-proof sheet; the first explosion-proof sheet and the second explosion-proof sheet are symmetrically arranged.

[0011] Preferably, the top cap plate bottom is fixed with an edge buckle; a groove is formed in the middle of the edge buckle; a buckle hole is formed in the middle of the groove.

[0012] The beneficial effects of the utility model are as follows:

[0013] The utility model provides a lithium ion battery top cap, through setting cooling box at the position of the conductive column installation, can reduce the heat generated when the conductive column carries out charge and discharge, maintains the temperature of the conductive column, makes the battery more stable in the use process, prevents the battery from appearing heat explosion and the like.

[0014] The utility model provides a lithium ion battery top cap, through setting the injection pipe into S type when reinfusing electrolyte, can prevent the electrolyte of injection from flowing back and the like, causes the internal disorder of the battery. DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the utility model, constitute a part of this application, the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute improper limitation to the utility model.

[0016] In the drawings:

[0017] Figure 1 It is the perspective view of the utility model;

[0018] Figure 2 It is the perspective view of the cooling box in the utility model;

[0019] Figure 3 It is the perspective view of the bellow in the utility model;

[0020] Figure 4 It is the perspective view of the injection pipe in the utility model;

[0021] Figure 5 It is the perspective view of the edge buckle in the utility model.

[0022] Legend:

[0023] 1, top cover plate; 11, annular base; 12, first cover plate; 13, cooling box; 14, second cover plate; 15, water inlet; 16, sleeve; 17, sealing gasket; 18, conductive column; 2, air bellow; 21, air outlet; 22, box cover; 23, mounting seat; 24, pressure relief cover; 3, liquid injection tank; 31, liquid injection pipe; 32, third cover plate; 33, liquid injection hole; 34, hole cover; 4, first positive electrode assembly; 41, second positive electrode assembly; 42, first negative electrode assembly; 43, second negative electrode assembly; 5, first explosion-proof sheet; 51, second explosion-proof sheet; 6, edge buckle; 61, groove; 62, buckle hole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Specific embodiments are given below.

[0026] As Figure 1 and Figure 2As shown, the utility model provides a kind of lithium ion battery top cover, including top cover plate 1;Its characterized in that: the annular base 11 is fixedly connected on the surface of top cover plate 1;The annular base 11 is set through top cover plate 1;First cover plate 12 is connected at the top of annular base 11;Sealing gasket 17 is connected on the inner wall of annular base 11;Cooling box 13 is connected at the top of sealing gasket 17;The cooling box 13 is hollowly arranged in the middle;Second cover plate 14 is connected at the top of cooling box 13;Water inlet 15 is formed in the top of second cover plate 14;Sleeve 16 is fixedly connected at the bottom of cooling box 13;Conductive column 18 is fixedly connected in the middle of sleeve 16;Conductive column 18 is penetrated to first cover plate 12;On work, through top cover plate 1 can support annular base 11, through annular base 11 can connect sealing gasket 17, through sealing gasket 17 can support cooling box 13, through cooling box 13 can connect second cover plate 14, through second cover plate 14 can seal cooling box 13, through airtightness can maintain the stability inside lithium battery, through second cover plate 14 can open water inlet 15, through water inlet 15 can pour liquid into cooling box 13, through the liquid in cooling box 13, can cooling conductive column 18 when charging and discharging, maintain the stability of battery, through second cover plate 14 can connect first cover plate 12, through first cover plate 12 can cover annular base 11, through cooling box 13 can connect sleeve 16, through sleeve 16 can support cooling box 13, through sleeve 16 can fixed conductive column 18, through fixed conductive column 18 can be contacted with battery conduction, through conduction can make battery normal work.

[0027] As Figure 3 Shown, the bottom of top cover plate 1 is fixedly connected with air bellow 2;Air outlet 21 is formed around air bellow 2;Box cover 22 is fixedly connected at the top of air bellow 2;Mounting seat 23 is fixedly connected at the top of box cover 22;Pressure relief cover 24 is fixedly connected at the top of mounting seat 23;On work, through top cover plate 1 can connect air bellow 2, through air bellow 2 can open air outlet 21, through air outlet 21 can be heat dissipated, through box cover 22 can seal air bellow 2, through box cover 22 can support mounting seat 23, through mounting seat 23 can support pressure relief cover 24, through pressure relief cover 24 can release excess pressure, through releasing excess pressure, can make the internal pressure of battery smaller, maintain the stability and safety of battery.

[0028] As Figure 3 And Figure 4As shown, the inside wall of the bellows 2 is fixed with a liquid injection tank 3; the bottom of the liquid injection tank 3 is fixed with a liquid injection pipe 31; the liquid injection pipe 31 is provided in an S shape; the top of the liquid injection tank 3 is fixed with a third cover plate 32; the top of the liquid injection hole 33 is fixed with a hole cover 34; in work, the liquid injection tank 3 can be supported by the bellows 2, the liquid injection pipe 31 can be installed by the liquid injection tank 3, the liquid injection tank 3 can be sealed by the third cover plate 32, the liquid injection hole 33 can be opened by the third cover plate 32, the electrolyte can be filled into the battery by the liquid injection hole 33, the electrolyte can not produce backflow effect after entering the battery by the liquid injection pipe 31, the pressure caused by backflow in the battery is reduced, and the liquid injection hole 33 can be covered by the hole cover 34.

[0029] As shown in the Figure 1 , the top of the top cover plate 1 is fixed with a first positive electrode assembly 4; the top of the top cover plate 1 is fixed with a second positive electrode assembly 41; the top of the top cover plate 1 is fixed with a first negative electrode assembly 42; the top of the top cover plate 1 is fixed with a second negative electrode assembly 43; the first positive electrode assembly 4, the second positive electrode assembly 41 and the first negative electrode assembly 42, the second negative electrode assembly 43 are symmetrically arranged; in work, the first positive electrode assembly 4, the second positive electrode assembly 41, the first negative electrode assembly 42 and the second negative electrode assembly 43 can be supported by the top cover plate 1, a plurality of pole column assemblies can be provided to prevent the battery from being disconnected when the positive and negative electrodes fall off, and the battery can work more stably.

[0030] As shown in the Figure 1 , the top of the top cover plate 1 is fixed with a first explosion-proof sheet 5; the top of the top cover plate 1 is fixed with a second explosion-proof sheet 51; the first explosion-proof sheet 5 and the second explosion-proof sheet 51 are symmetrically arranged, and in work, the first explosion-proof sheet 5 and the second explosion-proof sheet 51 can be supported by the top cover plate 1, the first explosion-proof sheet 5 and the second explosion-proof sheet 51 can be installed on the top cover plate 1 to prevent the battery from exploding when an accident occurs, causing greater damage.

[0031] As shown in the Figure 5 , the bottom of the top cover plate 1 is fixed with an edge buckle 6; the middle of the edge buckle 6 is provided with a groove 61; the middle of the groove 61 is provided with a buckle hole 62; in work, the edge buckle 6 is connected to the top cover plate 1 of the battery, the groove 61 is provided on the edge buckle 6, the buckle hole 62 is provided in the groove 61, the battery top cover plate 1 can be better installed on the lithium battery through the groove 61, and the connection between the battery top cover plate 1 and the battery can be more stable and reliable through the buckle hole 62.

[0032] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A lithium-ion battery top cover comprising a top cover plate (1); characterized in that: The top cover plate (1) is provided with an annular base (11) on the surface; the annular base (11) is arranged through the top cover plate (1); the annular base (11) is connected with a first cover plate (12) on the top; the annular base (11) is connected with a sealing gasket (17) on the inner side wall; the sealing gasket (17) is connected with a cooling box (13) on the top; the cooling box (13) is provided with a hollow in the middle; the cooling box (13) is connected with a second cover plate (14) on the top; the second cover plate (14) is provided with a water inlet (15) on the top; the cooling box (13) is fixedly connected with a sleeve (16) on the bottom; the sleeve (16) is fixedly connected with a conductive column (18) in the middle; the conductive column (18) penetrates through the first cover plate (12).

2. The top cover of the lithium ion battery according to claim 1, characterized in that: The top cover plate (1) is fixedly connected with a wind box (2) on the bottom; the wind box (2) is provided with an air outlet (21) around; the wind box (2) is fixedly connected with a box cover (22) on the top; the box cover (22) is fixedly connected with a mounting seat (23) on the top; the mounting seat (23) is fixedly connected with a pressure relief cover (24) on the top.

3. The top cover of the lithium ion battery according to claim 2, characterized in that: The wind box (2) is fixedly connected with a liquid injection tank (3) on the inner side wall; the liquid injection tank (3) is fixedly connected with a liquid injection pipe (31) on the bottom; the liquid injection pipe (31) is provided in an S shape; the liquid injection tank (3) is fixedly connected with a third cover plate (32) on the top; the third cover plate (32) is provided with a liquid injection hole (33) on the top; the liquid injection hole (33) is fixedly connected with a hole cover (34) on the top.

4. The top cover of the lithium ion battery according to claim 1, characterized in that: The top cover plate (1) is fixedly connected with a first positive electrode assembly (4) on the top; the top cover plate (1) is fixedly connected with a second positive electrode assembly (41) on the top; the top cover plate (1) is fixedly connected with a first negative electrode assembly (42) on the top; the top cover plate (1) is fixedly connected with a second negative electrode assembly (43) on the top; the first positive electrode assembly (4), the second positive electrode assembly (41), the first negative electrode assembly (42), and the second negative electrode assembly (43) are symmetrically arranged.

5. The top cover of the lithium ion battery according to claim 4, characterized in that: The top cover plate (1) is fixedly connected with a first explosion-proof sheet (5) on the top; the top cover plate (1) is fixedly connected with a second explosion-proof sheet (51) on the top; the first explosion-proof sheet (5) and the second explosion-proof sheet (51) are symmetrically arranged.

6. The top cover of a lithium ion battery according to claim 5, wherein: The top cover plate (1) is fixedly connected with an edge buckle (6) on the bottom; the edge buckle (6) is provided with a groove (61) in the middle; the groove (61) is provided with a buckle hole (62) in the middle.

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