CN218039418U

CN218039418U - Brine discharge device for waste lithium iron phosphate battery

Info

Publication number: CN218039418U
Application number: CN202222272617.1U
Authority: CN
Inventors: 伍儒锋; 李鑫; 秦波
Original assignee: Guangdong Jinsheng New Energy Co ltd
Current assignee: Guangdong Jinsheng New Energy Co ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-12-13
Anticipated expiration: 2032-08-29

Abstract

The utility model discloses a brine discharge device for waste lithium iron phosphate batteries; belonging to the technical field of waste battery recovery; the technical key points of the device comprise a brine discharge cell, wherein a plurality of hanging baskets are uniformly distributed in the brine discharge cell, the outer bottom of each hanging basket is connected with a fixing ring, and an annular sealing component is arranged between each fixing ring and the inner bottom of the brine discharge cell; the fixing ring is matched with the annular sealing component to form a sealed water guide cavity; a water outlet pipe communicated with the sealed water guide cavity is arranged at the bottom of the brine discharge tank, a water inlet pipe communicated with the inner cavity of the brine discharge tank is arranged at the upper end near end part of the brine discharge tank, and a brine circulating conveying mechanism is communicated and connected between the water inlet pipe and the water outlet pipe; the utility model aims to provide a brine discharge device for waste lithium iron phosphate batteries, which has high discharge efficiency and can ensure that the battery cell of the lithium battery can be fully contacted with brine; the method is used for high-efficiency discharge of the lithium iron phosphate battery core.

Description

Brine discharge device for waste lithium iron phosphate battery

Technical Field

The utility model relates to a salt solution discharge device, more specifically say, especially relate to a salt solution discharge device for old and useless lithium iron phosphate battery.

Background

In a lithium iron phosphate recovery system, a lithium battery needs to be subjected to discharge treatment first. When in treatment, the battery core of the waste lithium iron phosphate battery is put into 10-15% sodium sulfate salt water, the anode and the cathode of the battery are discharged in a short circuit, the discharging time is about 24-50 h, the residual electric quantity of the battery is discharged, and the working condition is normal temperature and normal pressure. After the rest electricity is discharged, the battery core is drained by a special lifting appliance and then transferred to a conveying bin, and the salt water discharge tank adopts a glass fiber reinforced plastic interlayer bottom plate for corrosion prevention and seepage prevention. The heat generated in the electric energy releasing process is absorbed by the brine, so the waste battery can not generate explosion due to instant heat release of short circuit in the brine tank. After discharging, the battery cell enters a coarse crushing process; and the tank liquor in the brine discharge tank is periodically replaced and enters a sodium sulfate system.

At present, enterprises generally directly put waste lithium iron phosphate battery cells into hanging baskets in batches, and then put the hanging baskets into a brine tank for brine discharge. However, in the discharging process, the cells are stacked together, and meanwhile, a large amount of bubbles are generated at the cathode and the anode of the battery, so that the cells of the lithium battery positioned in the middle of the hanging basket are difficult to be in full contact with saline water, and the discharging efficiency is greatly influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the not enough of above-mentioned prior art, provide a waste lithium iron phosphate battery with brine discharge device that discharge efficiency is high, lithium cell electricity core can fully contact with salt solution.

The technical scheme of the utility model is realized like this: a saline discharge device for waste lithium iron phosphate batteries comprises a saline discharge battery, wherein a plurality of hanging baskets are uniformly distributed in the saline discharge battery, the outer bottom of each hanging basket is connected with a fixing ring, and an annular sealing assembly is arranged between each fixing ring and the inner bottom of the saline discharge battery; the fixing ring is matched with the annular sealing component to form a sealed water guide cavity;

a water outlet pipe communicated with the sealed water guide cavity is arranged at the bottom of the brine discharge tank, a water inlet pipe communicated with the inner cavity of the brine discharge tank is arranged at the upper end near end part of the brine discharge tank, and a brine circulating conveying mechanism is communicated and connected between the water inlet pipe and the water outlet pipe;

the salt water around the hanging basket passes through the hanging basket, enters the sealed water guide cavity through the bottom of the hanging basket, and then enters the salt water discharge pool through the water outlet pipe, the salt water circulating conveying mechanism and the water inlet pipe in sequence to realize circulating flow.

In the brine discharge device for the waste lithium iron phosphate batteries, the annular sealing assembly comprises a positioning support ring arranged at the inner bottom of the brine discharge battery, an annular positioning groove matched with the positioning support ring is arranged at the bottom of the fixing ring, and a sealing ring in contact with the positioning support ring is arranged at the top of the annular positioning groove.

In the brine discharge device for the waste lithium iron phosphate batteries, the cross section of the positioning support ring in the vertical direction is of a trapezoid structure with a small upper part and a large lower part, and the annular positioning groove is matched with the trapezoid structure.

In the brine discharge device for the waste lithium iron phosphate batteries, the brine circulating and conveying mechanism comprises a circulating pump arranged at the outer bottom of the brine discharge tank, a conveying pipe is connected between a water inlet of the circulating pump and a water outlet pipe in a conduction mode, and a return pipe is connected between a water outlet of the circulating pump and a water inlet pipe in a conduction mode.

In the brine discharge device for the waste lithium iron phosphate batteries, the delivery pipe is uniformly provided with the plurality of first fins, and the return pipe is uniformly provided with the plurality of second fins.

After the structure is adopted in the utility model, through solid fixed ring, annular seal assembly, the outlet pipe, mutually support between inlet tube and the salt solution circulation conveying mechanism, in using, hanging flower basket salt solution all around passes the hanging flower basket, and get into the sealed water guide intracavity that solid fixed ring and annular seal assembly cooperate to constitute through the bottom of hanging flower basket, again according to the preface via the outlet pipe, salt solution circulation conveying mechanism and inlet tube get into in the salt solution discharge cell, realize the circulation flow, thereby make in the hanging flower basket each lithium cell electricity core homoenergetic fully contact with the salt solution of circulation flow, improve discharge efficiency greatly.

Drawings

The present invention will be described in further detail with reference to the embodiments shown in the drawings, which should not be construed as limiting the invention in any way.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the fixing ring and the ring-shaped sealing assembly of the present invention.

Fig. 3 is a partially enlarged schematic view at a in fig. 2.

In the figure: 1. discharging the battery by using saline water; 2. a hanging basket; 3. a fixing ring; 4. an annular seal assembly; 4a, positioning a support ring; 4b, an annular positioning groove; 4c, a sealing ring; 5. a water outlet pipe; 6. a water inlet pipe; 7. a brine circulating and conveying mechanism; 7a, a circulating pump; 7b, a conveying pipe; 7c, a return pipe; 7d, a first fin; 7e, second fins.

Detailed Description

Referring to fig. 1 to 3, the brine discharge device for the waste lithium iron phosphate batteries of the present invention includes a brine discharge battery 1, sodium sulfate brine is filled in the brine discharge battery 1, a plurality of hanging baskets 2 are uniformly distributed in the brine discharge battery 1 for stacking lithium battery cells, a fixing ring 3 is connected to an outer bottom of each hanging basket 2, and an annular sealing assembly 4 is arranged between each fixing ring 3 and an inner bottom of the brine discharge battery 1; the fixing ring 3 is matched with the annular sealing component 4 to form a sealed water guide cavity; a water outlet pipe 5 communicated with the sealed water guide cavity is arranged at the bottom of the brine discharge tank 1, a water inlet pipe 6 communicated with the inner cavity of the brine discharge tank 1 is arranged at the upper end near end part of the brine discharge tank 1, and a brine circulating conveying mechanism 7 is communicated and connected between the water inlet pipe 6 and the water outlet pipe 5, so that brine in the brine discharge tank 1 can flow in a circulating manner from top to bottom; the salt water all around of hanging flower basket 2 passes hanging flower basket 2 to get into sealed water guide chamber through the bottom of hanging flower basket 2, again according to the preface via outlet pipe 5, salt water circulating conveyor 7 and inlet tube 6 get into salt water and put in battery 1, realize the circulation flow, thereby make in hanging flower basket 2 each lithium battery electricity core homoenergetic fully contact with the salt water of circulation flow, improve discharge efficiency greatly.

During the discharging process of the battery, a large amount of bubbles (oxygen, hydrogen and the like) are generated at the cathode and the anode of the battery, and the direct discharging can bring potential safety hazards. Therefore, the top of the brine discharge tank 1 is connected with a top cover through a flange, and an annular sealing gasket is arranged at the joint between the top cover and the flange and can seal the joint between the top cover and the flange; then, a plurality of waste gas discharge ports are uniformly distributed at the near end part of the upper end of the brine discharge cell 1, and the horizontal height of the waste gas discharge ports is higher than that of the water inlet pipe 6, so that brine is prevented from flowing out through the waste gas discharge ports; each exhaust port passes through pipeline and outside negative pressure equipment turn-on connection, can collect the waste gas that the battery discharge in-process produced, concentrates and handles, avoids the direct potential safety hazard of bringing when arranging outward of waste gas.

Specifically, the annular sealing assembly 4 comprises a positioning support ring 4a arranged at the bottom in the saline discharge cell 1, an annular positioning groove 4b adapted to the positioning support ring 4a is arranged at the bottom of the fixing ring 3, and a sealing ring 4c in contact with the positioning support ring 4a is arranged at the top of the annular positioning groove 4 b. During the use, location support ring 4a inserts in annular constant head tank 4b to under the effect of hanging flower basket 2 self gravity, compress tightly sealing washer 4c, make and to keep sealed between solid fixed ring 3 and the location support ring 4a, avoid salt water to get into sealed water guide intracavity from solid fixed ring 3 and the handing-over department of location support ring 4a, and then make salt water can only pass hanging flower basket 2, get into sealed water guide chamber from the bottom of hanging flower basket 2 again. Furthermore, the section of the positioning support ring 4a in the vertical direction is of a trapezoid structure with a small upper part and a large lower part, the annular positioning groove 4b is adapted to the trapezoid structure, and when the hanging basket 2 is placed, the positioning support ring 4a is convenient to insert into the annular positioning groove 4 b; meanwhile, the trapezoidal structure is stable, and the supporting effect can be improved. Still further, there are a plurality of guide bars in the bottom of salt discharge cell 1 along the circumference equipartition of hanging flower basket 2, and the lower part of each guide bar sets up and suits with hanging flower basket 2 along vertical direction, and the upper portion of each guide bar sets up towards the one side slope of keeping away from hanging flower basket 2 to can carry out guiding orientation to hanging flower basket 2, transfer the in-process at hanging flower basket 2, make location support ring 4a can insert smoothly in annular positioning groove 4 b.

In addition, the brine circulating and conveying mechanism 7 comprises a circulating pump 7a arranged at the outer bottom of the brine discharging battery 1, a conveying pipe 7b is connected between a water inlet of the circulating pump 7a and the water outlet pipe 5 in a conduction mode, and a return pipe 7c is connected between a water outlet of the circulating pump 7a and the water inlet pipe 6 in a conduction mode. The brine in the brine discharge cell 1 can be circulated by the mutual cooperation among the circulation pump 7a, the delivery pipe 7b and the return pipe 7c. Furthermore, a plurality of first fins 7d are evenly distributed on the conveying pipe 7b, a plurality of second fins 7e are evenly distributed on the return pipe 7c, in the circulating flowing process of brine, the brine is cooled through the fins, and the brine is prevented from being overhigh in temperature due to heat generated when the battery discharges in the brine discharge battery 1. Still further, there is a waste water discharge pipe at the delivery port of circulating pump 7a through the pipe connection, waste water discharge pipe and outside sodium sulfate system turn-on connection can discharge the salt solution in the salt solution discharge pond 1 regularly, change. Simultaneously, the bottom in salt solution discharge cell 1 and the water discharge pipe between the turn-on connection have supplementary drain pipe, can discharge salt solution in the salt solution discharge cell 1 is whole, avoid long-pending staying. Valves are provided in the return pipe 7c, the waste water discharge pipe, and the auxiliary drain pipe, respectively, and the flow state of the piping is controlled by the valves.

In this embodiment, the brine discharge tank 1, the basket 2, the fixing ring 3, the annular sealing component 4, the brine circulating and conveying mechanism 7, etc. are all subjected to corrosion protection treatment, which is the prior art and will not be described herein again. In addition, it should be noted that the circulating pump 7a and how the circulating pump 7a is controlled in the present application are both in the prior art, and the connections between the components are also both in the prior art, so the connection relationship and principle thereof are not described herein again.

During the use, put into hanging flower basket 2 with lithium cell electricity core, hang hanging flower basket 2 again to salt solution discharge cell 1 in to make location support ring 4a insert in annular positioning groove 4b, make solid fixed ring 3, location support ring 4a, annular positioning groove 4b and sealing washer 4c mutually support and constitute sealed water guide chamber. Then, sodium sulfate brine is fed into the brine discharge cell 1 (the liquid level does not exceed the exhaust gas discharge port), and then the circulation pump 7a is started to circulate the brine in the brine discharge cell 1 in a circulating manner while the brine is fed upward and downward. In the process of circulating brine, the brine around the hanging basket 2 passes through the hanging basket 2 and enters the sealed water guide cavity through the bottom of the hanging basket 2, so that each lithium battery cell in the hanging basket 2 can be fully contacted with the circulating brine, and the discharge efficiency is greatly improved.

The above embodiment is the preferred embodiment of the present invention, which is only used to facilitate the explanation of the present invention, it is not right to the present invention, which makes the restriction on any form, and any person who knows commonly in the technical field can use the present invention to make the equivalent embodiment of local change or modification without departing from the technical features of the present invention.

Claims

1. A saline discharge device for waste lithium iron phosphate batteries comprises a saline discharge battery (1), and is characterized in that a plurality of hanging baskets (2) are uniformly distributed in the saline discharge battery (1), the outer bottom of each hanging basket (2) is connected with a fixing ring (3), and an annular sealing assembly (4) is arranged between each fixing ring (3) and the inner bottom of the saline discharge battery (1); the fixing ring (3) is matched with the annular sealing component (4) to form a sealed water guide cavity;

a water outlet pipe (5) communicated with the sealed water guide cavity is arranged at the bottom of the brine discharge tank (1), a water inlet pipe (6) communicated with the inner cavity of the brine discharge tank (1) is arranged at the near end part of the upper end of the brine discharge tank (1), and a brine circulating conveying mechanism (7) is communicated and connected between the water inlet pipe (6) and the water outlet pipe (5);

the saline water around the hanging basket (2) passes through the hanging basket (2), enters the sealed water guide cavity through the bottom of the hanging basket (2), and then sequentially enters the saline water discharging battery (1) through the water outlet pipe (5), the saline water circulating and conveying mechanism (7) and the water inlet pipe (6) to realize circulating flow.

2. The brine discharge device for the waste lithium iron phosphate batteries according to claim 1, wherein the annular sealing assembly (4) comprises a positioning support ring (4 a) arranged at the bottom in the brine discharge battery (1), an annular positioning groove (4 b) adapted to the positioning support ring (4 a) is arranged at the bottom of the fixing ring (3), and a sealing ring (4 c) in contact with the positioning support ring (4 a) is arranged at the top of the annular positioning groove (4 b).

3. The brine discharge device for waste lithium iron phosphate batteries according to claim 2, wherein the cross section of the positioning support ring (4 a) in the vertical direction is of a trapezoid structure with a small top and a big bottom, and the annular positioning groove (4 b) is adapted to the trapezoid structure.

4. The brine discharge device for the waste lithium iron phosphate batteries according to claim 1, wherein the brine circulation and transportation mechanism (7) comprises a circulation pump (7 a) disposed at the outer bottom of the brine discharge tank (1), a transportation pipe (7 b) is conductively connected between the water inlet of the circulation pump (7 a) and the water outlet pipe (5), and a return pipe (7 c) is conductively connected between the water outlet of the circulation pump (7 a) and the water inlet pipe (6).

5. The brine discharge device for the waste lithium iron phosphate batteries as claimed in claim 4, wherein a plurality of first fins (7 d) are uniformly distributed on the delivery pipe (7 b), and a plurality of second fins (7 e) are uniformly distributed on the return pipe (7 c).