CN215578983U

CN215578983U - Novel threaded pole device of lithium battery

Info

Publication number: CN215578983U
Application number: CN202121796485.1U
Authority: CN
Inventors: 高峰; 赵冬梅; 陈雨; 张要枫
Original assignee: Hubei Titanium Era New Energy Co Ltd
Current assignee: Hubei Titanium Era New Energy Co Ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-01-18
Anticipated expiration: 2031-08-03

Abstract

A novel threaded pole device of a lithium battery comprises a threaded pole and a sealing screw, wherein a negative cover plate is arranged at the top of a lithium battery shell, a mounting hole is formed in the central part of the negative cover plate, the threaded pole is arranged in the mounting hole, a through hole is formed in the bottom of the threaded pole and is communicated with the inside of the lithium battery shell, a threaded hole is formed in the top of the threaded pole and is communicated with the through hole, the sealing screw is arranged in the threaded hole and is in threaded connection with the threaded hole, and a sealing gasket is arranged at the contact surface of the bottom of the sealing screw and the threaded hole; according to the utility model, in the exhaust process, the sealing screw is loosened by using the screwdriver, so that the gas in the battery can be exhausted from the exhaust hole, the device is simple to operate and high in working efficiency, and the problem of internal gas expansion of the lithium battery can be effectively solved.

Description

Novel threaded pole device of lithium battery

Technical Field

The utility model belongs to the technical field of lithium battery equipment, and particularly relates to a novel threaded pole device of a lithium battery.

Background

Because the lithium battery is an energy storage device based on the electrochemical reaction principle, gas can be generated in the battery in the charging and discharging processes, particularly in the pre-charging process of the battery, the gas yield is the most, and the gas needs to be discharged in time, so that the problem of bulging deformation or explosion accidents of the battery caused by excessive gas in the battery is prevented; among current battery exhaust mode majority was used for large-scale battery, exhaust apparatus adopted the screw thread form to install on the battery, when needs exhaust at every turn, needed to unscrew the relief valve many times in order to exhaust, and this kind of operating means not only can cause certain wearing and tearing to the screw thread of exhaust valve port, and the process of operation is comparatively complicated moreover, and work efficiency is low, is unfavorable for the long-term use of lithium cell.

In addition, most of the existing lithium battery liquid injection methods are to open holes on the end face of the battery, and liquid injection needs to be performed by aligning with a liquid injection port in the liquid injection process, so that the electrolyte flows outwards in the liquid injection process, and great waste of the electrolyte is caused; meanwhile, a procedure is required to be added for sealing after the liquid injection is finished, the opening is sealed by adopting a steel ball smashing mode in most of the existing sealing modes, and a layer of sealant is coated on the periphery of the liquid injection hole for insulation.

Disclosure of Invention

In view of the technical problems in the prior art, the novel threaded pole device for the lithium battery provided by the utility model adopts the novel threaded pole exhaust device for the lithium battery, the device only needs to use a screwdriver to unscrew a sealing screw in the exhaust process, gas in the battery can be exhausted from an exhaust hole, the device is simple to operate and high in working efficiency, and the problem of internal gas expansion of the lithium battery can be effectively solved.

The utility model provides a novel screw thread utmost point post device of lithium cell, including screw thread utmost point post and sealing screw, the negative pole apron has been installed at lithium cell casing's top, the mounting hole has been seted up at negative pole apron's central part, and screw thread utmost point post is installed in the mounting hole, and the bottom of screw thread utmost point post has been seted up the thru hole and is linked together with lithium cell casing is inside, and screw thread utmost point post's top set screw hole and with communicate each other between the thru hole, threaded hole in be equipped with sealing screw, sealing screw and screw hole threaded connection, sealing screw bottom and screw hole's contact surface department are provided with seal ring.

In the preferred scheme, the side wall of the threaded pole is provided with an exhaust hole which is communicated with a threaded hole in the threaded pole.

In the preferred scheme, the bottom of the threaded hole is provided with a movable gasket, and the movable gasket is connected with the bottom of the threaded hole through a spring.

In the preferred scheme, the outer diameter of the sealing washer is consistent with the inner diameter of the threaded hole, and the sealing washer controls the opening and closing of the exhaust hole in the threaded pole.

In the preferred scheme, the threaded pole and the negative cover plate are connected in a welding mode, and the connecting part of the threaded pole and the negative cover plate is coated with a sealant.

This patent can reach following beneficial effect:

1. the device integrates the liquid injection hole and the exhaust hole of the lithium battery, so that the liquid injection space of the battery is enlarged, the waste of electrolyte can be reduced during the liquid injection of the battery, the filling cost of the electrolyte is further reduced, the injection of the electrolyte is faster, and the working efficiency of the liquid injection is improved;

2. when the battery needs to be exhausted, only a screwdriver is used for loosening screws in the device, and the screws are tightened after the gas in the battery is exhausted from the exhaust holes; the device easy operation, work efficiency are high and use cost are low, can effectual solution lithium cell inside flatulence scheduling problem, make the device can be extensive be applicable to market.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic diagram of an explosive structure according to the present invention;

FIG. 2 is a top view structural diagram of the threaded post of the present invention;

FIG. 3 is a bottom view of the threaded post of the present invention;

fig. 4 is a cross-sectional plan view of a threaded post of the present invention.

In the figure: the lithium battery comprises a lithium battery shell 1, a negative electrode cover plate 2, a threaded pole 3, a sealing washer 4, a sealing screw 5, an exhaust hole 6, a movable gasket 7, a spring 8, a through hole 9 and a threaded hole 10.

Detailed Description

As shown in figure 1, a novel threaded pole device of lithium battery, including threaded pole 3 and sealing screw 5, negative cover plate 2 has been installed at the top of lithium battery shell 1, the central point of negative cover plate 2 has seted up the mounting hole, threaded pole 3 installs in the mounting hole, thru hole 9 has been seted up and is linked together with lithium battery shell 1 is inside to threaded pole 3's bottom, the electrolyte of filling from threaded pole 3 department can permeate the inside of battery shell 1 from thru hole 9, threaded pole 3's top set up screw hole 10 and with between thru hole 9 communicate each other, be equipped with sealing screw 5 in the screw hole 10, sealing screw 5 and screw hole 10 threaded connection, through the gas tightness of screwing or not hard up sealing screw 5 steerable threaded pole 3, and then accomplish functions such as annotate liquid and the exhaust to the lithium battery, sealing screw 5 bottom and screw hole 10's contact surface department is provided with seal ring 4 and can further improve sealing screw 5 airtight under the sealed state that sealing screw 5 can be further And (4) sex.

According to the preferable scheme, as shown in fig. 2, the exhaust hole 6 is formed in the side wall of the threaded pole 3, the exhaust hole 6 is communicated with a threaded hole 10 in the threaded pole 3, electrolyte can be directly filled into the threaded pole 3 through the exhaust hole 6, and when the battery runs and generates gas inside the battery, the internal gas can be exhausted through the exhaust hole 6.

In a preferred scheme, as shown in fig. 2 to 4, a movable gasket 7 is arranged at the bottom of the threaded hole 10, and the movable gasket 7 is connected with the bottom of the threaded hole 10 through a spring 8. The outer diameter of the sealing washer 4 is consistent with the inner diameter of the threaded hole 10;

when the sealing screw 5 is screwed into the threaded hole 10, the lower end of the sealing screw 5 is connected with the sealing washer 4, the sealing washer 4 can push the movable gasket 7 downwards, the spring 8 below the movable gasket 7 is compressed downwards, the sealing washer 4 moves downwards and blocks the exhaust hole 6, and the inside of the sealing screw 5 is sealed;

when the sealing screw 5 is screwed out from the threaded hole 10, the sealing screw 5 and the lower end connecting sealing washer 4 move upwards, the spring 8 below the movable washer 7 extends, the sealing washer 4 leaves from the exhaust hole 6, the inside of the sealing screw 5 is communicated with the outside, and the gas in the battery can be exhausted outwards through the exhaust hole 6. Meanwhile, electrolyte can be filled into the battery through the vent hole 6.

The preferable scheme is as shown in fig. 1, the threaded pole 3 is connected with the negative cover plate 2 in a welding mode, the connection part of the threaded pole 3 and the negative cover plate 2 is coated with sealant, the tightness between the threaded pole 3 and the negative cover plate 2 is ensured, and the negative cover plate 2 is connected with the battery center post in the battery.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.

Claims

1. The utility model provides a novel screw thread utmost point post device of lithium cell, includes screw thread utmost point post (3) and sealing screw (5), its characterized in that: negative pole apron (2) have been installed at the top of lithium cell casing (1), the mounting hole has been seted up at the central point of negative pole apron (2), and threaded post (3) are installed in the mounting hole, and thru hole (9) have been seted up and are linked together with lithium cell casing (1) is inside to the bottom of threaded post (3), and threaded hole (10) and with intercommunication each other between thru hole (9) are seted up at the top of threaded post (3), are equipped with sealing screw (5) in screw hole (10), sealing screw (5) and screw hole (10) threaded connection, sealing screw (5) bottom and the contact surface department of screw hole (10) are provided with seal ring (4).

2. The novel threaded pole device of a lithium battery as claimed in claim 1, characterized in that: the side wall of the threaded pole (3) is provided with an exhaust hole (6), and the exhaust hole (6) is communicated with a threaded hole (10) in the threaded pole (3).

3. The novel threaded pole device of a lithium battery as claimed in claim 1, characterized in that: the bottom of the threaded hole (10) is provided with a movable gasket (7), and the movable gasket (7) is connected with the bottom of the threaded hole (10) through a spring (8).

4. The novel threaded pole device of a lithium battery as claimed in claim 1, characterized in that: the outer diameter of the sealing washer (4) is consistent with the inner diameter of the threaded hole (10), and the sealing washer (4) controls the air exhaust hole (6) in the threaded pole (3) to open and close.

5. The novel threaded pole device of a lithium battery as claimed in claim 1, characterized in that: the threaded pole (3) is connected with the negative cover plate (2) in a welding mode, and sealant is coated on the connecting part of the threaded pole (3) and the negative cover plate (2).