CN218351656U

CN218351656U - Lithium titanate battery

Info

Publication number: CN218351656U
Application number: CN202222755554.5U
Authority: CN
Inventors: 何天卫; 何天潘
Original assignee: Super Ness Shenzhen New Energy Group Co ltd
Current assignee: Super Ness Shenzhen New Energy Group Co ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-01-20
Anticipated expiration: 2032-10-19

Abstract

The utility model relates to the technical field of batteries, in particular to lithium titanate battery, including battery case, install positive post and negative pole post on the battery case, the level is provided with the baffle in the battery case, the baffle divides the battery case internal part into dress liquid chamber and air vent, evenly distributed has the bleeder vent on the baffle, install waterproof ventilated membrane in the bleeder vent, the top fixedly connected with installation section of thick bamboo of air vent, the inner chamber of installation section of thick bamboo is equipped with the telescopic link, the telescopic link includes fixed cylinder and movable rod, the fixed cover of movable rod is equipped with the slide, the slide separates the installation section of thick bamboo inner chamber into first cavity and second cavity from top to bottom in proper order, be connected with the spring between the bottom of slide and the chamber bottom of second cavity, the through-hole has been seted up on the installation section of thick bamboo, the gassing hole has been seted up on the battery case, the top fixedly connected with the chock of movable rod; the utility model discloses need not external control circuit and also can be automatic outwards discharge the gas that produces in the charge-discharge reaction process, prevent the physiosis problem, convenient to use, rational in infrastructure.

Description

Lithium titanate battery

Technical Field

The utility model relates to the technical field of batteries, in particular to lithium titanate battery.

Background

Lithium titanate batteries have been developed rapidly in recent years due to their excellent cycle performance and rate capability, but the safety of lithium titanate batteries has been a key problem restricting the development of lithium titanate batteries, and in the use process of traditional lithium titanate batteries, because positive and negative electrodes and electrolyte can generate a part of gas in the continuous reaction process, the generated gas can cause the battery to swell, and the use safety and service life are seriously affected.

The current Chinese patent with the publication number of CN207338500U, a novel lithium titanate battery, including box hat, anodal utmost point ear, negative pole utmost point ear, dress liquid chamber, plenum chamber, waterproof ventilated membrane, baroceptor, gas outlet, copper sheet, thermistor, box hat right-hand member terminal surface is equipped with anodal utmost point ear, and the box hat left end terminal surface is equipped with negative pole utmost point ear, and evenly distributed has waterproof ventilated membrane on the baffle, and baroceptor is installed at the plenum chamber top, and the plenum chamber left end is equipped with the gas outlet, and anodal utmost point ear inside is equipped with the copper sheet. When the gas pressure regulating device is used, gas generated by electrolyte is filtered out through the waterproof breathable film, the gas pressure is sensed by the gas pressure sensor, when the gas pressure exceeds the original set value of a user, the regulating valve is opened and discharges the gas, the gas pressure in the battery is regulated, and the phenomenon of gas expansion is prevented.

However, when the lithium titanate battery is actually used, the lithium titanate battery in the above scheme needs an external control circuit to receive a data signal transmitted by the air pressure sensor, and sends a control signal to the regulating valve through the control circuit for control, so that gas generated in the charge-discharge reaction process can be discharged outwards, and the lithium titanate battery is extremely inconvenient to use, has a complex structure and needs to be further improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lithium titanate battery to solve the problem that proposes in the above-mentioned background art, need not external control circuit and also can prevent the physiosis problem, convenient to use, rational in infrastructure with the gaseous outside discharge that produces in the charge-discharge reaction process voluntarily.

In order to achieve the above purpose, the technical solution of the present invention is as follows:

a lithium titanate battery comprises a battery shell, wherein a positive pole and a negative pole are mounted on the battery shell, a partition plate is horizontally arranged in the battery shell and divides the interior of the battery shell into a liquid containing chamber and a ventilation chamber, electrolyte and electrodes are arranged in the liquid containing chamber, air holes are uniformly distributed in the partition plate, a waterproof and breathable film is mounted in each air hole, a mounting cylinder is fixedly connected to the top of each ventilation chamber, and an inner cavity of each mounting cylinder is provided with a telescopic rod;

the telescopic link include a fixed section of thick bamboo and sliding connection be in the movable rod in the fixed section of thick bamboo, the bottom mounting of a fixed section of thick bamboo is in the inner chamber bottom of installation section of thick bamboo, fixed cover is equipped with the slide on the movable rod, the lateral wall of slide is followed the inside wall of installation section of thick bamboo slides from top to bottom, the slide will first cavity and second cavity are separated into from last down in proper order to installation section of thick bamboo inner chamber, the bottom of slide with be connected with the spring between the chamber end of second cavity, seted up the intercommunication on the installation section of thick bamboo first cavity with the through-hole of breather chamber, set up the gassing hole that communicates to first cavity on the battery case, the top fixedly connected with of movable rod with the chock of gassing hole looks adaptation.

Furthermore, the air vent is in a circular truncated cone shape, the small end of the air vent extends towards the outside of the battery shell, and the plug block is in a conical truncated cone shape.

Furthermore, the section of the chock is in a circular truncated cone shape, the sliding plate is in a cylindrical shape, and the maximum outer diameter of the chock is smaller than the minimum outer diameter of the sliding plate.

Furthermore, the waterproof breathable film is made of polytetrafluoroethylene materials.

Furthermore, a sealing ring is arranged on the outer side of the sliding plate.

The utility model has the advantages that:

during use, along with the continuous charging and discharging reaction of the electrolyte and the electrode in the liquid containing chamber, gas is generated in the reaction process to increase the internal gas pressure of the liquid containing chamber, the increased gas pressure can drive the sliding plate to move downwards to drive the movable rod to contract, meanwhile, the spring is compressed, the movable rod contracts to drive the plug block to move downwards, the gas in the liquid containing chamber is discharged outwards from a gap between the plug block and the gas discharging hole, and after the gas pressure in the first chamber is reduced, the sliding plate moves upwards under the action of the restoring force of the spring to drive the movable rod to extend out, and the plug block blocks the gas discharging hole again; the utility model discloses need not external control circuit and also can be automatic outwards discharge the gas that produces in the charge-discharge reaction process, prevent the physiosis problem, convenient to use, rational in infrastructure.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

fig. 3 is an enlarged schematic view of a point a in fig. 2.

Reference numerals: a battery case 1; a liquid-containing chamber 101; a breather chamber 102; a gas bleed hole 103; a positive post 2; a negative pole 3; a partition plate 4; a waterproof breathable film 5; a mounting cylinder 6; a first chamber 601; a second chamber 602; a through hole 603; a fixed cylinder 7; a movable rod 8; a chock 9; a slide plate 10; a seal ring 11; a spring 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, 2 and 3, a lithium titanate battery comprises a battery shell 1, wherein a positive pole 2 and a negative pole 3 are mounted on the battery shell 1, a partition plate 4 is horizontally arranged in the battery shell 1, the partition plate 4 divides the interior of the battery shell 1 into a liquid containing chamber 101 and a vent chamber 102, electrolyte and electrodes are arranged in the liquid containing chamber 101, vent holes are uniformly distributed in the partition plate 4, a waterproof breathable film 5 is mounted in the vent holes, a mounting tube 6 is fixedly connected to the top of the vent chamber 102, and an inner cavity of the mounting tube 6 is provided with a telescopic rod;

the telescopic link includes a fixed cylinder 7 and a movable rod 8 slidably connected in the fixed cylinder 7, the bottom end of the fixed cylinder 7 is fixed at the bottom of the inner cavity of the mounting cylinder 6, a sliding plate 10 is fixedly sleeved on the movable rod 8, the outer side wall of the sliding plate 10 slides up and down along the inner side wall of the mounting cylinder 6, the sliding plate 10 separates the inner cavity of the mounting cylinder 6 into a first cavity 601 and a second cavity 602 from top to bottom in sequence, a spring 12 is connected between the bottom of the sliding plate 10 and the bottom of the second cavity 602, a through hole 603 for communicating the first cavity 601 with the ventilation chamber 102 is formed in the mounting cylinder 6, an air release hole 103 communicated with the first cavity 601 is formed in the battery shell 1, and a plug block 9 matched with the air release hole is fixedly connected at the top end of the movable rod 8.

In the using process, along with the continuous charging and discharging reaction of the electrolyte and the electrode in the liquid containing chamber 101, gas is generated in the reaction process to increase the internal gas pressure of the liquid containing chamber 101, the increased gas pressure can drive the sliding plate 10 to move downwards to drive the movable rod 8 to contract, meanwhile, the spring 12 is compressed, the movable rod 8 contracts to drive the plug block 9 to move downwards, the gas in the liquid containing chamber 101 is discharged outwards from a gap between the plug block 9 and the air release hole 103, after the gas pressure in the first chamber 601 is reduced, the sliding plate 10 moves upwards under the action of the restoring force of the spring 12 to drive the movable rod 8 to extend out, and the plug block 9 blocks the air release hole 103 again; the utility model discloses need not external control circuit and also can be automatic outwards discharge the gas that produces in the charge-discharge reaction process, prevent the physiosis problem, convenient to use, rational in infrastructure.

As shown in fig. 3, the air vent 103 is in a circular truncated cone shape, a small end of the air vent 103 extends to the outside of the battery case 1, and the stopper 9 is in a tapered truncated cone shape; the section of the chock block 9 is in a circular truncated cone shape, the sliding plate 10 is in a cylindrical shape, and the maximum outer diameter of the chock block 9 is smaller than the minimum outer diameter of the sliding plate 10; in this embodiment, the air vent 103 and the plug 9 are both designed in a tapered shape, so that a gap is formed between the plug 9 and the air vent 103 when the plug moves down.

As shown in fig. 2, the waterproof and breathable film 5 is made of polytetrafluoroethylene material; in this embodiment, the waterproof and breathable membrane 5 is made of polytetrafluoroethylene, which can prevent liquid from entering the breather chamber

As shown in fig. 3, a sealing ring 11 is arranged on the outer side of the sliding plate 10; in this embodiment, the sealing ring 11 is arranged to ensure that the first chamber 601 and the second chamber 602 are isolated from each other, and when gas is generated by charge and discharge reactions, a gas pressure difference can be generated between the first chamber 601 and the second chamber 602.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A lithium titanate battery comprises a battery shell (1), wherein a positive pole (2) and a negative pole (3) are mounted on the battery shell (1), a partition plate (4) is horizontally arranged in the battery shell (1), the interior of the battery shell (1) is partitioned into a liquid containing chamber (101) and a ventilation chamber (102) by the partition plate (4), electrolyte and electrodes are arranged in the liquid containing chamber (101), ventilation holes are uniformly distributed in the partition plate (4), a waterproof ventilation film (5) is mounted in the ventilation holes, a mounting barrel (6) is fixedly connected to the top of the ventilation chamber (102), and an inner cavity of the mounting barrel (6) is provided with a telescopic rod;

the telescopic link includes solid fixed cylinder (7) and sliding connection be in movable rod (8) in solid fixed cylinder (7), the bottom mounting of solid fixed cylinder (7) is in the inner chamber bottom of installation section of thick bamboo (6), the fixed cover is equipped with slide (10) on movable rod (8), the lateral wall of slide (10) is followed the inside wall of installation section of thick bamboo (6) slides from top to bottom, slide (10) will installation section of thick bamboo (6) inner chamber is from last down separating into first cavity (601) and second cavity (602) in proper order, the bottom of slide (10) with be connected with spring (12) between the chamber bottom of second cavity (602), seted up the intercommunication on installation section of thick bamboo (6) first cavity (601) with through-hole (603) of air vent (102), set up the gas release hole (103) of first cavity (601) on battery case (1) and communicate to, the top fixedly connected with of movable rod (8) with chock (9) of gassing adaptation.

2. The lithium titanate battery of claim 1, wherein: the air vent (103) is in a circular truncated cone shape, the small end of the air vent (103) extends towards the outside of the battery shell (1), and the plug block (9) is in a conical truncated cone shape.

3. The lithium titanate battery of claim 2, wherein: the section of the chock block (9) is in a circular table shape, the sliding plate (10) is in a cylindrical shape, and the maximum outer diameter of the chock block (9) is smaller than the minimum outer diameter of the sliding plate (10).

4. The lithium titanate battery of claim 1, wherein: the waterproof breathable film (5) is made of polytetrafluoroethylene materials.

5. The lithium titanate battery of claim 1, wherein: and a sealing ring (11) is arranged on the outer side of the sliding plate (10).