CN220774458U

CN220774458U - Multifunctional bin and energy storage equipment

Info

Publication number: CN220774458U
Application number: CN202322413011.XU
Authority: CN
Inventors: 袁少伟; 韩晓宇
Original assignee: Shaanxi Olympus Power Energy Co Ltd
Current assignee: Shaanxi Olympus Power Energy Co Ltd
Priority date: 2023-09-06
Filing date: 2023-09-06
Publication date: 2024-04-12
Anticipated expiration: 2033-09-06

Abstract

The utility model provides a multifunctional bin and energy storage equipment, which mainly solve the problems of performance degradation and potential safety hazard of the existing battery. The multifunctional bin comprises a box body, a fluid supplementing assembly and a pressure releasing assembly; the inner cavity of the box body is divided into a control chamber and an electrolyte chamber which are mutually independent, and the electrolyte chamber and the sealing plate form a closed chamber; the fluid infusion assembly comprises a suction mechanism, a fluid infusion tube and a fluid infusion valve; one end of the liquid supplementing pipe is communicated with the electrolyte chamber, and the other end of the liquid supplementing pipe is connected with the single battery; the suction mechanism is used for injecting electrolyte in the electrolyte chamber into the single battery, and the fluid supplementing valve is arranged on a fluid supplementing pipe at the outlet end of the suction mechanism and is a normally closed valve; the pressure relief assembly comprises a pressure relief pipe, a stop valve and a pressure relief valve; one end of the pressure relief pipe is communicated with the liquid supplementing pipe at the outlet end of the liquid supplementing valve, and the other end of the pressure relief pipe penetrates through the side plate of the box body and is provided with the pressure relief valve; the stop valve is arranged on a pressure relief pipe in the control chamber.

Description

Multifunctional bin and energy storage equipment

Technical Field

The utility model relates to the field of batteries, in particular to a multifunctional bin and energy storage equipment.

Background

The lithium ion battery has the advantages of high packaging reliability, high energy efficiency, simple structure, relatively convenient expansion and the like, and is widely applied to various fields such as energy storage, power batteries and the like. In the use process of lithium ion batteries, it is important to have stable electrical properties and high safety.

After the lithium ion battery works for a period of time, electrolyte is consumed, the electrolyte is too little to influence the performance of the battery, meanwhile, when the electrolyte is consumed, the electrolyte is decomposed to generate gas, the gas is gathered in the battery, the internal pressure of the battery is increased, and the problems of shell expansion, electrode deformation and other performance and potential safety hazards of the battery are caused.

Disclosure of Invention

The utility model provides a multifunctional bin and energy storage equipment, which mainly solve the problems of performance degradation and potential safety hazard of the existing battery.

In order to solve the problems, the technical scheme of the utility model is as follows:

a multifunctional bin comprises a box body, a fluid supplementing component and a pressure releasing component; the inner cavity of the box body is divided into a control chamber and an electrolyte chamber which are mutually independent, and the electrolyte chamber and the sealing plate form a closed chamber for internally containing electrolyte; the fluid infusion assembly is arranged in the control chamber and comprises a suction mechanism, a fluid infusion tube and a fluid infusion valve; one end of the liquid supplementing pipe is communicated with the electrolyte chamber, and the other end of the liquid supplementing pipe is connected with the single battery; the suction mechanism is arranged on the liquid supplementing pipe and used for injecting electrolyte in the electrolyte chamber into the single battery, and the liquid supplementing valve is arranged on the liquid supplementing pipe at the outlet end of the suction mechanism and is a normally closed valve; the pressure relief assembly comprises a pressure relief pipe, a stop valve and a pressure relief valve; one end of the pressure relief pipe is communicated with the liquid supplementing pipe at the outlet end of the liquid supplementing valve, and the other end of the pressure relief pipe penetrates through the side plate of the box body and is provided with a pressure relief valve for discharging gas in the single battery; the stop valve is arranged on a pressure release pipe in the control chamber and is a normally open valve.

Further, an adsorption chamber connected in series with the pressure relief pipe is also arranged in the box body, and an adsorption material is arranged in the adsorption chamber.

Further, the box is a rectangular box with one open end, an L-shaped partition plate and a horizontal partition plate are arranged in the rectangular box, the L-shaped partition plate and the right side plate of the rectangular box form an electrolyte chamber, the L-shaped partition plate, the horizontal partition plate and the top plate of the rectangular box form an adsorption chamber above the electrolyte chamber, and the L-shaped partition plate, the top plate, the bottom plate and the left side plate of the rectangular box form a control chamber.

Further, the fluid infusion assembly further comprises a fluid infusion tube and a fluid infusion valve arranged on the fluid infusion tube, one end of the fluid infusion tube is communicated with the electrolyte chamber, and the other end of the fluid infusion tube extends out of the box body.

Further, a sealing joint is arranged on the side plate of the box body, the fluid infusion tube is connected with the single battery through the sealing joint, and the sealing joint is a plug self-locking joint.

Further, a pressure measuring device is further arranged on the pressure relief pipe, and the suction mechanism is a suction pump.

The utility model also provides energy storage equipment, which comprises a single battery and any one of the multifunctional bins, wherein the top of the single battery is provided with a flow guide pipe communicated with the inner cavity of the single battery, and a liquid supplementing pipe of the multifunctional bin is communicated with the flow guide pipe.

The utility model also provides energy storage equipment, which comprises a plurality of single batteries, a gas sharing pipe and the multifunctional bin; the gas areas at the tops of the plurality of single batteries are respectively communicated with a sharing pipeline, and the sharing pipeline is communicated with a liquid supplementing pipe.

Further, the sharing pipeline is communicated with the gas area at the top of each single battery through a plurality of branch pipelines, and the branch pipelines are welded with the upper cover plate and the sharing pipeline of the single battery respectively.

Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

1. the utility model provides a multifunctional bin which not only can carry out liquid supplementing operation on electrolyte in a single battery when the electrolyte is consumed so as to improve the performance of the multifunctional bin, but also can discharge gas in the single battery so as to improve the performance and the safety of the battery.

2. According to the multifunctional bin, the fluid infusion assembly and the pressure relief assembly are integrated in the box body, so that occupied space of the fluid infusion assembly and the pressure relief assembly is small, meanwhile, the pressure relief assembly can be used for vacuumizing operation before fluid infusion, and a vacuumizing pipeline is not required to be arranged on the fluid infusion assembly independently, so that manufacturing cost is saved.

3. The multifunctional bin is additionally provided with the adsorption chamber, and the adsorption material in the adsorption chamber can adsorb electrolyte discharged along with gas and impurities in the electrolyte, so that the damage of the electrolyte and the impurities generated after the gas is discharged is avoided.

4. The box body in the multifunctional bin is divided into the electrolyte chamber, the adsorption chamber and the control chamber by the L-shaped partition plate and the horizontal partition plate, and the electrolyte chamber, the adsorption chamber and the control chamber are reasonably arranged in the box body, so that devices in the box body are reasonably distributed in a limited space, and meanwhile, the box body has the characteristic of miniaturization as far as possible.

5. The liquid supplementing component in the multifunctional bin is further provided with the liquid injection pipe and the liquid injection valve, so that electrolyte can be conveniently injected into the electrolyte chamber through the liquid injection pipe and the liquid injection valve, and the condition that the electrolyte chamber supplements liquid for a plurality of batteries is met.

6. The sealing joint is arranged at the opening of the side plate of the box body and is used for realizing the rapid and reliable connection between the liquid supplementing pipe and the battery, and the sealing joint is a plug self-locking joint, so that leakage during liquid supplementing is avoided, and the safety during liquid supplementing is improved.

7. The pressure relief pipe is further provided with the pressure measuring device, the pressure measuring device can monitor the pressure in the single battery in real time and timely discharge the gas in the single battery, and meanwhile, the pressure measuring device can monitor the pressure in the battery when the pressure relief pipe is used for vacuumizing, so that the phenomenon that the single battery is excessively vacuumized and the influence on the battery is avoided.

8. According to the utility model, the multifunctional bin and the shared pipeline are added on the plurality of single batteries, the shared pipeline enables the gas environments inside the single batteries to be more convergent, a shared gas area is formed, the influence on the parallel batteries due to the difference of the single batteries is avoided, and meanwhile, the multifunctional bin and the shared pipeline form a shared exhaust channel and a liquid supplementing channel, so that the multifunctional bin can supplement liquid and exhaust the plurality of single batteries at the same time, and the performance and the safety of the energy storage equipment are integrally improved.

Drawings

FIG. 1 is a schematic view of the structure of a multifunctional bin according to embodiment 1 of the present utility model;

fig. 2 is a schematic structural diagram of an energy storage device in embodiment 2 of the present utility model;

fig. 3 is a schematic structural diagram of an energy storage device in embodiment 3 of the present utility model.

Reference numerals: 1-box, 2-fluid replacement component, 3-pressure release component, 4-battery cell, 5-branch pipeline, 6-sealed joint, 7-shared pipeline, 11-electrolyte room, 12-control room, 13-L-shaped baffle, 14-adsorption room, 15-horizontal baffle, 16-pressure measuring device, 17-closing plate, 21-suction mechanism, 22-fluid replacement pipe, 23-fluid replacement valve, 24-liquid injection pipe, 25-liquid injection valve, 31-pressure release pipe, 32-stop valve, 33-pressure release valve and 41-honeycomb duct.

Detailed Description

So that the manner in which the above recited objects, features and advantages of the present utility model can be understood in detail, a more particular description of the utility model, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the utility model without making any inventive effort, shall fall within the scope of the utility model.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

The appearances of the phrase "in other embodiments" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Also in the description of the present utility model, it should be noted that the orientation or positional relationship indicated by "top, bottom, inner and outer", etc. in terms are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1

As shown in fig. 1 to 3, the present embodiment provides a multifunctional cartridge mainly including a tank 1, a fluid replacement assembly 2, and a pressure release assembly 3. The inner cavity of the box body 1 is divided into a control chamber 12 and an electrolyte chamber 11 which are mutually independent, and the electrolyte chamber 11 is a sealing chamber for accommodating electrolyte. The fluid infusion assembly 2 is arranged in the control room 12, electrolyte is consumed after the single battery is used for a period of time, and at the moment, the fluid infusion assembly 2 infuses the electrolyte in the electrolyte room 11 into the single battery 4 for fluid infusion operation, so that the service life and the cycle times of the single battery are effectively prolonged. The main body of the pressure relief assembly 3 is also arranged in the control room 12, and the pressure relief assembly 3 has two functions, namely, before fluid infusion, the single battery is vacuumized so that the fluid infusion assembly 2 can smoothly infuse electrolyte into the single battery, and when the electrolyte of the single battery is decomposed to generate gas aggregation, an exhaust channel is formed, high-pressure gas in the single battery is timely discharged, hidden danger such as shell bulge and explosion caused by overlarge internal pressure of the single battery is avoided, and therefore the safety of the single battery is improved.

The case 1 in this embodiment is a rectangular case with one open end, and the inner cavity of the rectangular case is divided into two parts by a partition board, wherein one part is sealed by a sealing plate 17 to form an electrolyte chamber 11, and the other part is opened to form a control chamber 12, so that the fluid infusion assembly 2 and the pressure relief assembly 3 can be conveniently installed. When the electrolyte chamber is specifically arranged, the separation partition plate is an L-shaped partition plate 13, and the L-shaped partition plate 13, the top plate and the right side plate of the rectangular box body form the electrolyte chamber 11. The L-shaped partition 13 forms a control chamber 12 with the top, bottom and left side panels of the rectangular box. In other embodiments, the above-mentioned partition board may also be a rectangular frame formed by four plates, which is disposed in the inner cavity of the case 1 and forms a zigzag structure with the case, the space in the rectangular frame is the electrolyte chamber 11, and the space outside the rectangular frame is the control chamber 12. However, such a rectangular frame is not reasonable in space with respect to the L-shaped partition 13, and also does not facilitate the installation of the device. In addition, a door (not shown) may be hinged to the open end of the entire case 1 to protect the devices inside the entire case.

In the present embodiment, the fluid replacement assembly 2 is installed in the control chamber 12, and mainly fills the electrolyte in the electrolyte chamber 11 into the unit cells 4 to perform fluid replacement operation on the unit cells 4. The fluid infusion assembly 2 specifically comprises a suction mechanism 21, a fluid infusion tube 22 and a fluid infusion valve 23; one end of the fluid supplementing pipe 22 is communicated with the electrolyte chamber 11, and the other end is connected with the single battery 4; the suction mechanism 21 is provided on the fluid-replenishing pipe 22 for injecting the electrolyte in the electrolyte chamber 11 into the unit cell 4, and the fluid-replenishing valve 23 is provided on the fluid-replenishing pipe 22 at the outlet end of the suction mechanism 21, which is a normally closed valve, and is opened at the time of fluid-replenishing. The suction mechanism 21 may generally employ a suction pump.

In other embodiments, an opening may be further provided on the left side plate of the case 1, where a sealing joint 6 is installed at the opening, and the fluid infusion tube 22 is fast and reliably connected with the unit cell 4 through the sealing joint 6, where the sealing joint 6 may be a plug-in self-locking joint, so as to avoid leakage during fluid infusion and improve safety during fluid infusion.

The electrolyte chamber 11 is formed by the L-shaped partition 13 and the top plate and the right side plate of the rectangular box, the control chamber 12 is formed by the L-shaped partition 13 and the top plate, the bottom plate and the left side plate of the rectangular box, and the control chamber is formed by the L-shaped partition 13 and the bottom plate of the rectangular box, and the control chamber is formed by the L-shaped chamber, and at this time, the bottom of the electrolyte chamber 11 has a certain installation space, so that the suction mechanism 21 can be installed in the space below the electrolyte chamber 11, so that the space in the box 1 is reasonably distributed, and the box 1 is miniaturized as much as possible. At the same time, the arrangement is convenient for communicating the liquid supplementing pipe 22 with the bottom of the electrolyte chamber 11, so that the electrolyte in the electrolyte chamber 11 is injected into the single battery 4 as completely as possible.

In this embodiment, the fluid infusion assembly 2 further includes a fluid infusion tube 24 and a fluid infusion valve 25 disposed on the fluid infusion tube 24, wherein one end of the fluid infusion tube 24 is communicated with the electrolyte chamber 11, the other end extends out of the case 1, and the fluid infusion valve 25 is a normally closed valve and is opened during fluid infusion. The addition of the liquid filling pipe 24 and the liquid filling valve 25 can facilitate the connection with external equipment when the electrolyte in the electrolyte chamber 11 does not meet the liquid filling amount, so that the liquid filling operation of the plurality of single batteries 4 is completed.

In the present embodiment, the pressure relief assembly 3 includes a pressure relief pipe 31, a shutoff valve 32, and a pressure relief valve 33; one end of the pressure relief pipe 31 is communicated with the fluid supplementing pipe 22 at the outlet end of the fluid supplementing valve 23, and the other end of the pressure relief pipe penetrates through a side plate of the box body 1 and is provided with a pressure relief valve 33; the shut-off valve 32 is mounted on a pressure relief pipe 31 in the control chamber 12, which is a normally open valve, and is closed when replenishing liquid. The relief valve 33 is removed during the evacuation operation of the relief assembly 3 and installed after the completion of the fluid replacement.

In addition, an adsorption chamber 14 connected in series with the pressure release pipe 31 is further provided in the box 1, and an adsorption material is provided in an inner cavity of the adsorption chamber 14, and the adsorption material not only adsorbs in a vacuumizing process before liquid supplementing and is used for adsorbing electrolyte discharged along with vacuumizing gas, but also adsorbs gas in an exhausting process and prevents the electrolyte from being harmful along with gas discharge. The adsorption material can adopt a hole structure, for example, molecular sieve, active carbon and the like can be adopted.

Since the adsorption chamber 14 is also a closed chamber, a horizontal partition 15 may be added in the electrolyte chamber 11 when the adsorption chamber 14 is specifically provided, the L-shaped partition 13 and the right side plate of the rectangular box form the electrolyte chamber 11, the L-shaped partition 13, the horizontal partition 15, and the top plate of the rectangular box form the adsorption chamber 14, and the adsorption chamber 14 and the electrolyte chamber 11 are rectangular chambers, and the adsorption chamber 14 is located above the electrolyte chamber 11. In other embodiments, the adsorption chamber 14 may be a straight pipe with a diameter larger than that of the pressure release pipe 31, and the straight pipe is filled with the adsorption material.

Since the adsorption chamber 14 is connected in series to the pressure release tube 31, the pressure release tube 31 in this embodiment is mainly composed of two metal tubes, wherein one metal tube is an internal metal tube installed in the control chamber 12, two ends of the metal tube are respectively connected with the liquid supplementing tube 22 and the L-shaped partition 13, the stop valve 32 is installed on the internal metal tube, the other metal tube is an external metal tube, which is directly connected with an opening on the right side plate of the case 1, and the pressure release valve 33 is installed on the external metal tube.

In this embodiment, the pressure measurement device 16 is further disposed on the pressure relief tube 31, and the pressure measurement device 16 can monitor the pressure in the single battery 4 when the pressure relief tube 31 is used for vacuumizing, so as to avoid excessive vacuumizing of the single battery 4 and influence on the single battery 4.

In addition, the stop valve 32, the fluid supplementing valve 23 and the fluid filling valve 25 are preferably electric valves, and the electric valves are convenient to control, operate and install on site.

Example 2

As shown in fig. 1 and fig. 2, the energy storage device provided in this embodiment includes a single battery 4 and the multifunctional bin in the foregoing embodiment 1, where a housing of the single battery 4 mainly includes an upper cover plate, a lower cover plate, and a cylinder. The upper cover plate is provided with a flow guide pipe 41, the flow guide pipe 41 is an elbow pipe, and is in sealing connection with the upper cover plate, when in specific connection, the flow guide pipe 41 can be welded with the upper cover plate, can also be in sealing connection with the upper cover plate through a mode of coating sealant and the like after being in threaded connection, and when the flow guide pipe 41 is connected with the liquid supplementing pipe 22, the flow guide pipe 41 can be connected through welding, and can also be connected through a sealing joint 6 on the box body 1.

The multifunctional bin is connected with the single battery 4 and can be used as an exhaust channel, and the exhaust channel can exhaust gas generated by the single battery 4, so that the safety of the single battery 4 is improved. Meanwhile, the multifunctional bin can also be used as a performance lifting device of the single battery 4 to lift the performance of the single battery, when the single battery is used for a long time, the performance of the single battery can not meet the requirements, and the liquid supplementing assembly can supplement liquid electrolyte to the single battery at the moment so as to lift the energy of the single battery, and the use process of the liquid supplementing assembly and the pressure releasing assembly is as follows.

The diversion pipe 41 of the single battery 4 is connected with the liquid supplementing pipe 22 of the multifunctional bin, the battery works normally, the liquid supplementing valve 23 is in a normally closed state, and the stop valve 32 is in an open state. When the electrolyte in the cell is consumed to generate gas, and the gas accumulates to increase the internal pressure of the cell, the pressure release valve 33 is opened, and the high-pressure gas is discharged from the exhaust passage formed by the pressure release unit 3. After the gas is discharged, the single battery is required to be subjected to fluid infusion operation, and the fluid infusion process is as follows:

firstly, closing a stop valve 32 in the pressure relief assembly 3, at the moment, keeping a closed state of the fluid supplementing valve 23, removing a pressure relief valve 33 at the tail end of a pressure relief pipe 31, and connecting the pressure relief pipe 31 outside the box body 1 with vacuumizing equipment;

second, the stop valve 32 is opened, the vacuumizing device is opened, and vacuumizing operation is performed on the single battery 4, at this time, the internal pressure of the single battery 4 can be judged according to the numerical value in the pressure measuring device 16 or the operation time of the vacuumizing device;

third, after the vacuumizing is completed, closing the stop valve 32, opening the fluid supplementing valve 23, starting the suction mechanism 21, supplementing the electrolyte in the electrolyte chamber 11 into the inner cavity of the single battery 4, and filling the electrolyte to the liquid level of about 70% of the inner cavity of the single battery 4;

fourth, after the fluid infusion is completed, the fluid infusion valve 23 is closed, the vacuumizing device is separated from the pressure release pipe 31, the pressure release valve 33 detached in the earlier stage is mounted on the pressure release pipe 31, and then the stop valve 32 is opened, so that the fluid infusion is completed.

Example 3

As shown in fig. 1 and 3, the energy storage device provided in this embodiment includes a plurality of unit batteries 4 connected in parallel, a shared pipeline 7, and a multifunctional bin in the above embodiment. The shell of the single battery 4 mainly comprises an upper cover plate, a lower cover plate and a cylinder body. The gas at the top of the plurality of single batteries 4 is respectively communicated with the sharing pipeline 7, and the sharing pipeline 7 is connected with the liquid supplementing pipe 22. Because the gas areas at the tops of the single batteries 4 are mutually communicated by the shared pipeline 7, if more gas is generated by one single battery 4, the redundant gas can be communicated and exchanged with the gas at the tops of other single batteries 4, so that the gas environments in the single batteries 4 are more convergent to form a shared gas area, the single batteries 4 are in a balanced gas environment, and a gas difference environment is not formed because of more gas generated by one single battery 4, and the influence of the difference of the single batteries 4 on the parallel battery pack is avoided.

In this embodiment, the sharing pipeline 7 is a porous pipeline, wherein the number of holes of the porous pipeline is the same as that of the single batteries 4, and the structure that the upper cover plate of each single battery 4 is communicated with the porous pipeline includes the following structures:

(1) Are respectively connected through branch pipelines 5, and the connection positions are welded; the connecting mode has the advantages that the high reliability of the connecting position can ensure the tightness of the energy storage equipment;

(2) The branch pipelines 5 are respectively connected, the connection positions are connected by screw threads, and sealing gaskets are added at the screw threads, so that the mode has the advantage of lower connection cost;

(3) A branch pipeline 5 is integrally arranged on the upper cover plate of each single battery 4, and each hole of the branch pipeline 5 and the porous pipeline is extruded and installed in an interference fit mode; in the method, the sealing connection is realized by adopting an extrusion mode, so that the air tightness after extrusion is ensured, and the material requirements on the position of the opposite extrusion are severe.

The shared pipeline 7 and the fluid supplementing pipe 22 can be connected through welding or through a sealing joint 6 on the box body 1. Each unit cell 4 normally operates, the fluid-replenishing valve 23 is normally closed, and the shut-off valve 32 is opened. When the electrolyte in the cell is consumed to generate gas, and the gas accumulates to increase the cell internal pressure, the pressure release valve 33 is opened, and the gas is discharged from the exhaust passage formed by the pressure release module 3. After the gas is discharged, the liquid supplementing operation is required to be carried out on each single battery, and the liquid supplementing process is as follows:

second, the stop valve 32 is opened, the vacuumizing device is opened, and vacuumizing operation is performed on each single battery 4, and at this time, the internal pressure of each single battery 4 can be judged according to the numerical value in the pressure measuring device 16 or the operation time of the vacuumizing device;

third, after the vacuumizing is completed, closing the stop valve 32, opening the fluid supplementing valve 23, starting the suction mechanism 21, supplementing the electrolyte in the electrolyte chamber 11 into the inner cavity of each single battery 4, and filling the electrolyte to the liquid level of about 70% of the inner cavity of each single battery 4;

Claims

1. The multifunctional bin is characterized by comprising a box body, a fluid supplementing assembly and a pressure releasing assembly;

the inner cavity of the box body is divided into a control chamber and an electrolyte chamber which are mutually independent, and the electrolyte chamber and the sealing plate form a closed chamber for internally containing electrolyte;

the fluid infusion assembly is arranged in the control chamber and comprises a suction mechanism, a fluid infusion tube and a fluid infusion valve; one end of the liquid supplementing pipe is communicated with the electrolyte chamber, and the other end of the liquid supplementing pipe is connected with the single battery;

the suction mechanism is arranged on the liquid supplementing pipe and used for injecting electrolyte in the electrolyte chamber into the single battery, and the liquid supplementing valve is arranged on the liquid supplementing pipe at the outlet end of the suction mechanism and is a normally closed valve;

the pressure relief assembly comprises a pressure relief pipe, a stop valve and a pressure relief valve; one end of the pressure relief pipe is communicated with the liquid supplementing pipe at the outlet end of the liquid supplementing valve, and the other end of the pressure relief pipe penetrates through the side plate of the box body and is provided with a pressure relief valve for discharging gas in the single battery; the stop valve is arranged on a pressure release pipe in the control chamber and is a normally open valve.

2. The multifunctional bin of claim 1, wherein an adsorption chamber connected in series with the pressure relief tube is further provided in the box body, and an adsorption material is provided in the adsorption chamber.

3. The multifunctional bin of claim 2, wherein the box is a rectangular box with one end open, an L-shaped partition plate and a horizontal partition plate are arranged in the rectangular box, the L-shaped partition plate and a right side plate of the rectangular box form an electrolyte chamber, the L-shaped partition plate, the horizontal partition plate and a top plate of the rectangular box form an adsorption chamber above the electrolyte chamber, and the L-shaped partition plate, the top plate, the bottom plate and the left side plate of the rectangular box form a control chamber.

4. A multifunctional cartridge according to any one of claims 1 to 3 wherein the fluid replacement assembly further comprises a fluid injection tube and a fluid injection valve disposed on the fluid injection tube, one end of the fluid injection tube being in communication with the electrolyte chamber and the other end extending out of the housing.

5. The multifunctional bin of claim 4, wherein the side plates of the box body are provided with sealing joints, the liquid supplementing pipe is connected with the single battery through the sealing joints, and the sealing joints are plug-in self-locking joints.

6. The multifunctional cartridge of claim 5, wherein the pressure relief tube is further provided with a pressure measuring device, and the suction mechanism is a suction pump.

7. An energy storage device, characterized by comprising a single battery and the multifunctional bin according to any one of claims 1 to 6, wherein the top of the single battery is provided with a flow guide pipe communicated with an inner cavity of the single battery, and a liquid supplementing pipe of the multifunctional bin is communicated with the flow guide pipe.

8. An energy storage device comprising a plurality of single cells, a shared line, and the multifunctional bin of any one of claims 1 to 6; the gas areas at the tops of the plurality of single batteries are respectively communicated with a sharing pipeline, and the sharing pipeline is communicated with a liquid supplementing pipe.

9. The energy storage device of claim 8, wherein: the sharing pipeline is communicated with the gas area at the top of each single battery through a plurality of branch pipelines, and the branch pipelines are welded with the upper cover plate and the sharing pipeline of the single battery respectively.