CN219873902U

CN219873902U - Support device for high-capacity battery, high-capacity battery and energy storage equipment

Info

Publication number: CN219873902U
Application number: CN202320958658.8U
Authority: CN
Inventors: 张三学; 雷政军; 李鹏
Original assignee: Shaanxi Olympus Power Energy Co Ltd
Current assignee: Shaanxi Olympus Power Energy Co Ltd
Priority date: 2023-04-25
Filing date: 2023-04-25
Publication date: 2023-10-20
Anticipated expiration: 2033-04-25

Abstract

The utility model provides a supporting device of a high-capacity battery, the high-capacity battery and energy storage equipment, and mainly solves the problem that an existing supporting mechanism of the high-capacity battery with a sharing unit is complex in structure. The high-capacity battery comprises a battery pack main body formed by a plurality of parallel single batteries, and the inner cavity of each single battery comprises an electrolyte area and a gas area; the supporting device is used for stably supporting the battery pack main body and is provided with an electrolyte chamber used for communicating the electrolyte areas of the single batteries. The supporting device can stably support the battery pack main body and can be used as a shared electrolyte chamber, and the supporting structure at the bottom of the high-capacity battery is simple and convenient to install and manufacture the whole high-capacity battery.

Description

Support device for high-capacity battery, high-capacity battery and energy storage equipment

Technical Field

The utility model belongs to the field of batteries, and particularly relates to a supporting device of a high-capacity battery, the high-capacity battery and energy storage equipment.

Background

The lithium battery has various advantages and is widely applied to various fields, and in the application of the existing lithium battery, a plurality of single batteries are often required to be connected in series, in parallel or in a series-parallel combination mode to form a battery module so as to meet the use requirement of a scene with larger capacity. When a plurality of single batteries are connected in parallel to form a battery module, even though the single batteries forming the battery module all undergo the capacity-dividing and sorting process, the capacity, resistance, voltage and other performances of all the single batteries in the battery module still have some differences. When the battery module is operated for a period of time, the difference between the single batteries is further increased, and the service life of the battery module is influenced.

According to the research, if a plurality of single batteries in the battery module are in a unified electrolyte system, the problem that the consistency difference of each single battery in the battery module is gradually increased can be greatly relieved. For example, chinese patent CN115360484a discloses an electrolyte sharing unit and a high-capacity battery, the sharing unit includes a plurality of subunits, the subunits include a main path and a branch path, the main path is used for splicing the subunits to form the sharing unit, the branch path is fixedly installed with a battery cell housing, so as to inject the electrolyte into the battery cell housing, the main path includes a first connection end and a second connection end, and two adjacent subunits are fixedly spliced to form the electrolyte sharing unit through the first connection end and the second connection end respectively. The sharing unit realizes the intercommunication of electrolyte in each cell (namely single battery).

However, in order to ensure stable placement of the above high-capacity battery having the sharing unit during actual use, a supporting mechanism needs to be provided below the high-capacity battery body, but since the sharing unit is located below the high-capacity battery body, the supporting mechanism needs to be provided with consideration of avoiding the position of the sharing unit and also needs to be provided with consideration of how insulation is maintained between the sharing unit, so that the overall structure of the supporting mechanism is complex.

Disclosure of Invention

The utility model provides a supporting device for a large-capacity battery, the large-capacity battery and energy storage equipment, and aims to solve the problem that an existing supporting mechanism for the large-capacity battery with a sharing unit is complex in structure.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the large-capacity battery comprises a battery pack main body formed by a plurality of parallel single batteries, wherein the inner cavity of each single battery comprises an electrolyte area and a gas area; the supporting device is used for stably supporting the battery pack main body and is provided with an electrolyte chamber used for communicating the electrolyte areas of the single batteries. The supporting device can stably support the battery pack main body of the high-capacity battery, can be used as an electrolyte sharing cavity, and does not need to be independently provided with a sharing unit at the bottom of the high-capacity battery, so that the supporting device at the bottom of the high-capacity battery is simple in structure and convenient to install and manufacture the whole high-capacity battery.

When the electrolyte chamber is arranged in the supporting device, the electrolyte chamber can be realized through the following various structures:

the first supporting device and the second supporting device are of rectangular box structures, the width dimension of the rectangular box is larger than or equal to that of the single battery, the inner cavity of the rectangular box is an electrolyte chamber, the top wall of the rectangular box is provided with a plurality of through holes for communicating the electrolyte area of the single battery with the electrolyte chamber, and the supporting device of the rectangular box is convenient to process and install;

the second supporting device comprises a rectangular frame and an elongated hollow tube fixed in the rectangular frame; the width dimension of the rectangular frame is larger than or equal to that of the single battery, two ends of the slender hollow tube are closed, the inner cavity is an electrolyte chamber, and a plurality of through holes for communicating the electrolyte area of the single battery with the electrolyte chamber are formed in the top wall of the slender hollow tube. In the supporting device with the frame-type structure, electrolyte is only required to be filled in the slender hollow tube, so that the use amount of the electrolyte in the high-capacity battery can be reduced; meanwhile, when the electrolyte intercommunication is realized through the slender hollow tube, the slender hollow tube is only required to be sealed, and the sealing performance of the whole supporting device is good. In addition, the frame-type structure is convenient for the supporting device to be fixedly connected with the bottom of the single battery.

Further, a liquid injection assembly for injecting the electrolyte into the electrolyte chamber may be further provided on the support device; the liquid injection assembly comprises a liquid injection pipe and a liquid injection valve, wherein the liquid injection pipe is communicated with the electrolyte chamber, and the liquid injection valve is arranged on the liquid injection pipe. The electrolyte injection assembly can not inject electrolyte when the electrolyte is shared, and can supplement or replace the electrolyte of the high-capacity battery after the high-capacity battery works for a period of time so as to improve the performance of the high-capacity battery.

The utility model also provides a high-capacity battery, which comprises a battery pack main body and the supporting device, wherein the battery pack main body consists of a plurality of parallel single batteries, the supporting device is arranged below the battery pack main body and is used for stably supporting the battery pack main body, an electrolyte chamber of the supporting device is used for communicating electrolyte areas of all the single batteries, and an explosion venting assembly is arranged at the top of each single battery or on the supporting device and is used for exhausting thermal runaway smoke when any single battery is in thermal runaway. The high-capacity battery with the supporting device does not need to be provided with an electrolyte sharing pipeline independently, so that the manufacturing cost of the high-capacity battery is reduced, the high-capacity battery is convenient to modularized, and later installation and maintenance are convenient.

In order to improve the safety of the high-capacity battery, the thermal runaway smoke of each single battery in the high-capacity battery can be discharged in a directional manner, and particularly, the discharge of the thermal runaway smoke can be realized in the following two modes:

the top of each single battery is provided with an explosion venting port, and the explosion venting assembly comprises an explosion venting main pipe, a plurality of explosion venting branch pipes and a plurality of explosion venting parts; one end of each explosion venting branch pipe is connected to the explosion venting port of each single battery, the other end of each explosion venting branch pipe is connected with the explosion venting main pipe, and the explosion venting parts are arranged on the explosion venting branch pipes or in the explosion venting ports. The explosion venting branch pipe and the explosion venting main pipe of each single battery form an explosion venting channel, and when the explosion venting of any single battery is out of control, the influence on the adjacent single battery can be reduced;

the second explosion venting assembly comprises the explosion venting pipe communicated with the electrolyte chamber and the explosion venting part arranged on the explosion venting pipe, and the structure takes the electrolyte chamber at the bottom of the large-capacity battery as an explosion venting channel.

Further, the explosion venting part is an explosion venting membrane or an explosion venting valve.

Based on the large-capacity battery, the utility model also provides energy storage equipment which comprises a battery frame and a plurality of large-capacity batteries, wherein the large-capacity batteries are fixed on the battery frame in an insulating way and distributed in a matrix form, so that the whole energy storage equipment has the characteristic of high energy density. The heat-supply and gas-discharge type solar heat collector comprises a plurality of high-capacity batteries, at least one upright post is of a hollow structure, explosion venting components of the plurality of high-capacity batteries are connected with an inner cavity of the hollow upright post through a collecting pipe, when any single battery is in thermal runaway, the explosion venting components are opened, and the collecting pipe and the hollow upright post are used as channels for discharging heat-supply and gas-discharge out of control.

Preferably, all the upright posts are hollow structures. The hollow upright post structure enables the thermal runaway smoke gas to disperse in the cavities of the upright posts, increases the stroke of the thermal runaway smoke gas, and avoids potential safety hazards caused by the aggregation of the thermal runaway smoke gas when a plurality of batteries are in thermal runaway. Meanwhile, the upright post with the hollow structure can also reduce the weight of the whole energy storage equipment, so that the energy storage equipment has the characteristic of light weight;

further, the energy storage device further comprises a liquid storage bin for collecting electrolyte, and the liquid storage bin is communicated with the bottom of the hollow upright post. Electrolyte in the thermal runaway flue gas can be collected to the stock solution storehouse for the thermal runaway flue gas of follow-up emission produces the destruction to the environment and diminishes, simultaneously, collect the back with electrolyte, and follow-up exhaust thermal runaway flue gas can reduce the risk of secondary explosion, and the security of large capacity battery and energy storage equipment promotes to some extent.

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

according to the utility model, the electrolyte chamber of the high-capacity battery is arranged in the supporting device, so that the supporting device can not only stably support the battery pack main body of the high-capacity battery, but also be used as an electrolyte sharing cavity, and the problem that the supporting mechanism is complex in structure due to the existence of an electrolyte sharing pipeline is avoided. Meanwhile, the manufacturing cost of the high-capacity battery can be reduced because an electrolyte sharing pipeline is not required to be arranged independently. In addition, the supporting device also saves the installation space of the electrolyte sharing pipeline, so that more batteries can be distributed in a limited space, the energy density and the space utilization rate of the energy storage device are improved, and the integration level of the energy storage device is higher.

The electrolyte chamber in the supporting device is formed by an integrated structure, so that the leakage problem of a spliced structure is reduced.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a large-capacity battery with a rectangular box body as a supporting device in an embodiment of the present utility model;

fig. 2 is a schematic structural view of a large-capacity battery with a rectangular frame as a supporting device according to an embodiment of the present utility model;

FIG. 3 is a schematic view illustrating the installation of a large-capacity battery with a column and a beam in an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a large-capacity battery according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of an explosion venting assembly disposed on the top of a large-capacity battery according to an embodiment of the present utility model.

The reference numerals are as follows: 1-large-capacity battery, 2-supporting device, 3-liquid injection component, 4-upright post, 5-cross beam, 6-liquid storage bin, 11-single battery, 12-explosion venting branch pipe, 13-explosion venting main pipe, 14-connecting branch pipe, 21-through hole, 22-explosion venting pipe, 23-explosion venting valve, 24-rectangular frame, 25-slender hollow pipe, 26-positioning groove, 31-liquid injection pipe and 32-liquid injection valve.

Detailed Description

The utility model will be described in detail below with reference to the drawings and the detailed description. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

The existing energy storage equipment is used for arranging a plurality of battery modules in series-parallel connection to meet the charge and discharge requirements, and the battery modules can be formed by connecting the existing single cylindrical batteries or square shell batteries in series-parallel connection, or large-capacity batteries formed by the existing single batteries are adopted. After a large-capacity battery is formed from a plurality of unit cells, the large-capacity battery has a weight of several hundred kilograms, and when the large-capacity battery is used for an energy storage device, it is required to stably support the large-capacity battery.

As shown in fig. 1 and 2, the present utility model provides a supporting device for a large-capacity battery, wherein a battery pack main body of the large-capacity battery 1 is mainly formed by connecting a plurality of single batteries 11 in parallel, and an inner cavity of each single battery 11 comprises an electrolyte area and a gas area. The support device 2 is mainly used for stably supporting the battery pack body, and the support device 2 is also provided with an electrolyte chamber for communicating the electrolyte areas of the single batteries 11. The electrolyte chamber is used as an electrolyte sharing cavity, and the electrolyte areas of the single batteries 11 are communicated, so that the electrolytes of all the single batteries 11 are in the same system, and the difference between the electrolytes of the single batteries 11 is reduced. When the electrolyte chamber is provided in the above supporting device 2, this can be achieved by various structures, and in this embodiment, the following two forms are included:

as shown in fig. 1, the first form of the supporting device 2 is a rectangular box structure, and the width dimension of the rectangular box is greater than or equal to the width dimension of the single battery 11, so that the supporting device 2 stably supports the battery pack body. The inner cavity of the rectangular box body is an electrolyte chamber, and the top wall of the rectangular box body is provided with a plurality of through holes 21 for communicating the electrolyte area of the single battery 11 with the electrolyte chamber. During actual processing, the rectangular box body structure is formed by the U-shaped shell with one open end and the cover plate for covering the opening, and when the U-shaped shell and the cover plate are connected to form an electrolyte chamber, the electrolyte chamber needs to be well sealed, so that electrolyte in the electrolyte chamber does not leak. In addition, the top of the rectangular box body may be further provided with a plurality of positioning grooves 26, the shape of the positioning grooves 26 is matched with the shape and the size of the lower cover plate of the single battery 11, and the bottom of each single battery 11 is correspondingly embedded into each positioning groove 26, so that each single battery 11 is accurately mounted on the supporting device 2. The supporting device 2 of the rectangular box body is convenient to process and install, and the supporting is more stable.

As shown in fig. 2, the second form of the above-mentioned supporting device 2 comprises a rectangular frame 24 and an elongated hollow tube 25 fixed inside the rectangular frame 24; the rectangular frame 24 has a width dimension equal to or greater than the width dimension of the unit cells 11, so that the support device 2 stably supports the battery pack body. The two ends of the slender hollow tube 25 are closed, the inner cavity is an electrolyte chamber, and a plurality of through holes 21 for communicating the electrolyte area of the single battery 11 with the electrolyte chamber are formed in the top wall of the slender hollow tube 25. In the supporting device 2 with the frame-type structure, the electrolyte sharing of each single battery can be realized only by filling the slender hollow tube 25 with the electrolyte, so that the use amount of the electrolyte is reduced; meanwhile, when the electrolyte intercommunication is realized through the slender hollow tube 25, the slender hollow tube 25 is only required to be sealed, and the sealing performance of the whole supporting device 2 is good. In addition, the contact area between the top of the supporting device 2 and the bottom of the single battery 11 in the frame structure is relatively small, the flatness is easy to ensure, and the single battery 11 and the supporting device 2 are easy to fixedly connect.

Compared with the structure formed by splicing the existing electrolyte sharing units through pipelines, when the electrolyte chamber is arranged in the supporting device 2 in fig. 1 and 2, the electrolyte chamber is formed through an integrated structure, so that the problem of leakage of the sharing units, which is possibly caused by non-ideal coaxiality between the subunits during processing and butt-joint installation of the spliced pipelines, is avoided.

The supporting device 2 is also provided with an electrolyte injection assembly 3 for injecting electrolyte into the electrolyte chamber. The electrolyte injection assembly 3 can not inject electrolyte into the electrolyte chamber after each single battery 11 is installed with the supporting device 2 to realize electrolyte sharing of each single battery, and can also supplement or replace the liquid of the large-capacity battery 1 after the large-capacity battery 1 works for a period of time so as to improve the performance of the large-capacity battery 1. In the present embodiment, the above liquid injection assembly 3 may specifically include a liquid injection pipe 31 and a liquid injection valve 32, the liquid injection pipe 31 communicating with the electrolyte chamber, the liquid injection valve 32 being provided on the liquid injection pipe 31. The liquid filling valve 32 is a normally closed valve, and is opened when filling liquid, and is closed after filling liquid is completed, when the electrolyte chamber is sealed in a non-liquid filling period. In other embodiments, other configurations of the injection assembly 3 may be used. For example, the liquid injection assembly 3 comprises a liquid injection port and a sealing end cover, wherein the liquid injection port is an opening formed in the supporting device and is communicated with the electrolyte chamber, the sealing end cover seals the liquid injection port, the sealing end cover is detached during liquid injection, and the sealing end cover is installed after liquid injection is completed to seal the liquid injection port.

As shown in fig. 1 and 2, the battery pack body formed by the support device 2 and each single battery 11 is assembled to form a large-capacity battery 1 so as to meet different capacity requirements. In the above-mentioned battery pack main body, the lower cover plate of each unit cell 11 is provided with a connecting branch pipe 14 communicating with the inner cavity thereof, the connecting branch pipe 14 protrudes from the lower cover plate, and the inner cavity of the unit cell 11 is sealed by a sealing sheet provided therein, and the sealing sheet may be a dissolving sheet capable of dissolving in an electrolyte, or a sealing member such as a sealing cover opened by an external force is used. When the large-capacity battery 1 is assembled, the connection branch pipe 14 at the bottom of each single battery 11 is inserted into the through hole 21 of the supporting device 2, and then the supporting device 2 and the single battery 11 are sealed and fixedly connected.

Based on the above structure, the process of mounting each single battery 11 and the supporting device 2 and injecting the electrolyte to realize electrolyte sharing is as follows:

firstly, fixedly connecting each single battery 11 with a supporting device 2;

when in installation, each single battery 11 is placed on the top of the supporting device 21, the connecting branch pipes 14 of each single battery 11 are respectively inserted into the through holes 21 of the supporting device 2, and then the supporting device 2 and the single battery 11 are fixed and sealed; in order to ensure the tightness and reliability of the connection, the lower cover plate of the unit cell 11 may be directly welded to the top of the supporting device 2 to achieve reliable connection and sealing. In other connection modes, the tail end of the connecting branch pipe 14 is provided with external threads, after the connecting branch pipe 14 of the single battery 11 is inserted into the top of the supporting device 21, the connecting branch pipe 14 is fixed by a nut in an electrolyte chamber, and meanwhile, a corrosion-resistant sealing ring can be arranged on the connecting branch pipe 14 to seal the joint of the connecting branch pipe 14 and the supporting device 21. In addition, a corrosion-resistant sealant can be coated on the contact surface of the lower cover plate of the single battery 11 and the supporting device 2, and fixation and sealing can be realized through the sealant. Compared with the mode of nut connection and sealant connection, the single battery 11 and the supporting device 2 are connected in a welding mode, and the tightness and the stability of connection are more reliable.

Secondly, electrolyte sharing is realized;

if the amount of electrolyte in each cell 11 satisfies the sharing requirement, and no additional electrolyte is needed, the sharing process is as follows: the sealing plate is directly opened to enable the electrolyte in the single battery 11 to flow into the electrolyte chamber for sharing, and at this time, attention needs to be paid to ensuring that the inner cavity environment of the electrolyte chamber is the environment with dew point standard of-25 to 40 ℃, humidity of less than or equal to 1%, temperature of 23+/-2 ℃ and cleanliness of 10 ten thousand grades before the electrolyte in the single battery 11 flows into the electrolyte chamber. The electrolyte chamber can be brought to the above-mentioned environmental standard by means of vacuum suction before the sealing plate is opened. Compared with the first supporting device, the second supporting device has the advantages that the electrolyte chamber is an elongated hollow tube, so that the consumption of electrolyte is small, and the sharing mode can be applied.

If the electrolyte in the single battery 11 does not meet the sharing requirement, when the electrolyte is injected into the electrolyte chamber from outside, the sharing process is implemented as follows:

when the sealing sheet in the connecting branch pipe 14 is a dissolving sheet, the connecting branch pipe 14 of each single battery 11 is connected with the supporting device 2 in a sealing way, then the electrolyte chamber is vacuumized, the liquid injection pipe 31 is connected with the liquid injection device, then the liquid injection valve 32 is opened, the electrolyte is injected into the electrolyte chamber through the liquid injection pipe 31, and after the liquid injection is completed, the liquid injection valve 32 is closed. After the filling, the electrolyte exists in the electrolyte chamber, and the dissolving pieces in the connecting branch pipes 14 are dissolved by the electrolyte, so that the electrolyte in each single battery 11 is communicated with the electrolyte in the electrolyte chamber.

When the connecting branch pipe 14 is provided with the sealing cover, the sealing cover is provided with the pull ring, and after the connecting branch pipe 14 is in sealing connection with the supporting device 2, the pull ring of each sealing cover is connected together through the traction rope through the liquid injection port arranged on the side wall of the supporting device 2. Before liquid injection, the electrolyte chamber is vacuumized, and the traction ropes connected with all sealing covers can be pulled to open the sealing covers in sequence in the environment with the dew point standard of-25 to 40 ℃ and the humidity of less than or equal to 1 percent, the temperature of 23+/-2 ℃ and the cleanliness of 10 ten thousand grades. And then connecting the liquid injection port with a liquid injection device, injecting liquid through the liquid injection port, and sealing the liquid injection port after the liquid injection is completed.

Through the process, the electrolyte chambers of the single batteries 11 are communicated, so that the electrolytes of all the single batteries 11 are in the same system, the difference between the electrolytes of the single batteries 11 is reduced, the consistency between the single batteries 11 is improved to a certain extent, and the cycle life of the high-capacity battery 1 is prolonged to a certain extent.

To improve the safety of the large-capacity battery 1, an explosion venting assembly may be disposed on the large-capacity battery 1, and the explosion venting assembly may be disposed on the top of each unit battery or on a supporting device for exhausting thermal runaway fumes during thermal runaway. In the present embodiment, the emission of thermal runaway fumes can be achieved in two ways;

first, as shown in fig. 5, the top of each single battery 11 is provided with an explosion venting port, and the explosion venting assembly comprises an explosion venting main pipe 13, a plurality of explosion venting branch pipes 12 and a plurality of explosion venting parts; one end of each explosion venting branch pipe 12 is connected to the explosion venting port of each single battery 11, the other end is connected to the explosion venting main pipe 13, and the explosion venting part is arranged on the explosion venting branch pipe 12 or in the explosion venting port. The explosion venting branch pipe 12 and the explosion venting main pipe 13 of each single battery 11 form an explosion venting channel, and when the explosion venting of any single battery 11 is out of control, the influence on the adjacent single battery 11 can be reduced. The explosion venting part can be an explosion venting film or an explosion venting valve, the explosion venting film is arranged in the explosion venting branch pipe 12 or the explosion venting opening, and the explosion venting valve is arranged on the explosion venting branch pipe 12.

Second, as shown in fig. 2, the explosion venting assembly includes an explosion venting tube 22 in communication with the electrolyte chamber and an explosion venting portion disposed on the explosion venting tube 22, which may be an explosion venting membrane disposed within the explosion venting tube 22 or an explosion venting valve 23 disposed on the explosion venting tube 22. The structure of taking the electrolyte chamber at the bottom of the large-capacity battery 1 as the explosion venting channel timely discharges almost all free electrolyte in the large-capacity battery 1, and reduces the possibility of continuous occurrence of thermal runaway.

In order to meet the use requirement of the existing energy storage device, and simultaneously to improve the space utilization, as shown in fig. 3 and 4, a plurality of large-capacity batteries 1 are fixed on a battery rack in an insulating manner, and the battery rack comprises a plurality of upright posts 4 and cross beams 5, namely, the plurality of large-capacity batteries 1 are arranged in a matrix form through the upright posts 4 and the cross beams 5, and the plurality of large-capacity batteries 1 are also arranged in a linear manner in the vertical direction while being arranged in the horizontal direction. In particular, during installation, a plurality of large-capacity batteries 1 are sequentially arranged on two side-by-side cross beams 5 in the horizontal direction, and then, a plurality of upright posts 4 connect a plurality of cross beams 5 arranged in the vertical direction. The cross member 5 and the upright 4 may be connected by various means, such as welding, bolting, etc. In such a matrix arrangement, the large-capacity battery 1 can be placed directly above the cross member 5 without connection. However, to ensure the stability of the support, the support device 2 of the large-capacity battery is preferably fixedly connected to the cross member 5.

In order to ensure the stability of the support, the support device 2 of the above large-capacity battery is generally made of metal, so that the support device 2 is an electrical conductor, and insulation treatment is required between the large-capacity batteries 1 at this time, so as to avoid the problem of short circuit of the large-capacity batteries 1 in the use process. The insulation treatment may be achieved in various ways, for example, by making the cross member 5 of an insulating material or integrally coating an insulating layer, or by adding an insulating plate or insulating pad at the position where the cross member 5 is connected to the supporting device 2.

In other implementations, if the number of the large-capacity batteries 1 in the energy storage device is small, the large-capacity batteries 1 are linearly arranged only in the vertical direction, and the horizontal cross beam 5 may be omitted at this time, so that the supporting devices 2 of the large-capacity batteries are directly and fixedly connected through the upright posts 4. When stand 4 and strutting arrangement 2 concretely connected, can set up the connecting plate on strutting arrangement 2, pass through bolted connection with connecting plate and stand 4, can also set up the couple on stand 4, set up the jack on strutting arrangement 2's connecting plate, hang strutting arrangement 2 on strutting arrangement 2. In this structure, insulation between the large-capacity batteries 1 is also considered, and in this case, the column 4 may be made of an insulating material, or the column 4 and the support device 2 may be connected by an insulating connection plate and an insulating bolt.

Because the high-capacity batteries in the energy storage equipment are highly aggregated, in the use process of the high-capacity battery 1, under the influence of factors such as overcharge, overdischarge, overheat, mechanical collision and the like, battery diaphragm collapse and internal short circuit are easy to cause thermal runaway, and at the moment, a thermal runaway flue gas channel is required to be arranged for directional discharge of the thermal runaway flue gas. In this embodiment, one of the upright posts 4 may be a hollow structure, and the explosion venting assembly of the plurality of large-capacity batteries 1 may be connected to the inner cavity of the hollow upright post 4 through a collecting pipe, so as to form a thermal runaway flue gas channel. The structure enables the energy storage equipment to be free from independently arranging a thermal runaway smoke emission device, and reduces the manufacturing cost of the energy storage equipment. When in specific connection, the hollow upright post 4 can be connected with the explosion venting component at the top of each single battery 11 to serve as a thermal runaway smoke channel, and can also be connected with the explosion venting component at the bottom of the large-capacity battery 1 to serve as a thermal runaway smoke channel, and the specific connection is as follows:

when the explosion venting assembly is connected with the top of each single battery 11, the hollow upright post 4 is connected with a collecting pipe, the collecting pipe is communicated with the inner cavity of the hollow upright post 4, the explosion venting main pipes 13 of the plurality of large-capacity batteries 1 are all connected with the collecting pipe, and the explosion venting branch pipes 12, the explosion venting main pipes 13, the collecting pipe and the hollow upright post 4 form a thermal runaway flue gas channel. For the large-capacity battery 1, because the distance between the adjacent single batteries 11 is smaller, when thermal runaway happens to any single battery 11, the thermal runaway flue gas after explosion venting is highly likely to be directly sprayed onto the surrounding single batteries 11, so that more serious linkage accidents happen, and therefore the safety of the energy storage device is increased by forming the thermal runaway flue gas channel by the explosion venting branch pipe 12, the explosion venting main pipe 13, the collecting pipe and the hollow upright post 4.

When the explosion venting assembly is connected with the explosion venting assembly at the bottom of the large-capacity battery 1, the explosion venting pipe 22 is arranged on the electrolyte chamber, the explosion venting membrane is arranged in the explosion venting pipe 22, the explosion venting valves 23 are arranged on the explosion venting membrane or the explosion venting pipe 22, the explosion venting pipes 22 of the large-capacity batteries 1 are connected with the collecting pipes, and at the moment, the electrolyte chamber, the explosion venting pipe 22, the collecting pipes and the hollow upright columns 4 of the supporting device 2 form a thermal runaway flue gas channel. Since the electrolyte chamber is used as the shared electrolyte chamber, the electrolyte is filled in the electrolyte chamber, and the method has the advantages that almost all free electrolyte in the large-capacity battery 1 is discharged in time, and the possibility that the electrolyte is synchronously caused to be out of control is reduced.

In theory, at least one column 4 forming a thermal runaway flue gas channel is guaranteed in number. However, preferably, all the upright posts 4 are hollow structures, at this time, the thermal runaway smoke is dispersed in the cavities of the upright posts 4, the stroke of the thermal runaway smoke is increased, and the potential safety hazard caused by the aggregation of the thermal runaway smoke when the batteries are in thermal runaway is avoided. Meanwhile, the upright post 4 with the hollow structure can lighten the weight of the whole supporting device 2, so that the supporting device has the characteristic of light weight. In addition, in order to further improve the safety of the energy storage device, the supporting device 2 is further provided with a liquid storage bin 6, and the liquid storage bin 6 is used for collecting electrolyte after thermal runaway of the battery. The liquid storage bin 6 can be externally mounted or internally mounted to collect electrolyte. When the external type device is externally arranged, the liquid storage bin 6 and the upright post 4 are independent devices, and can be specifically a box body structure with good sealing performance, and at the moment, the liquid storage bin 6 is communicated with the bottom of the hollow upright post 4; the installation mode enables the liquid storage space of the liquid storage bin 6 to be larger, and can meet the requirement of energy storage equipment with larger capacity. When the support device is installed in a built-in mode, the bottom of the inner cavity of the hollow upright post 4 is used as a liquid storage bin 6, and the integrated level of the support device 2 is higher due to the built-in installation. In addition, a liquid discharge valve can be arranged on the liquid storage bin 6, and the liquid discharge valve can timely discharge electrolyte in the liquid storage bin 6 to the collecting device. Above-mentioned stock solution storehouse 6 can collect the electrolyte in the thermal runaway flue gas for the thermal runaway flue gas of follow-up emission produces the destruction to the environment and diminishes, simultaneously, collect the back with the electrolyte, and follow-up exhaust thermal runaway flue gas can reduce the risk of secondary explosion, and the security of battery and energy storage equipment promotes to some extent. In addition, the electrolyte discharged by the part can be recycled in time and can be used continuously.

In this embodiment, the upright post 4 is set to be a hollow structure, and the structure makes the energy storage device not need to be provided with a thermal runaway smoke emission device alone, so that the manufacturing cost of the energy storage device is reduced, and meanwhile, the structure also saves the installation space in the box body of the energy storage device. The hollow upright post 4 forms a thermal runaway flue gas channel, so that the thermal runaway flue gas can be directionally discharged, and then centralized treatment is performed, so that the safety of the whole energy storage device is improved. In the practical use process, the thermal runaway flue gas treatment device can be used for carrying out centralized treatment on the thermal runaway flue gas, and the thermal runaway flue gas treatment device can be specifically a cooling device for carrying out condensation treatment on the thermal runaway flue gas, or an adsorption device for carrying out adsorption treatment on the thermal runaway flue gas, or a direct ignition device for the thermal runaway flue gas, or a combination of two or three of the above three modes.

Claims

1. The large-capacity battery comprises a battery pack main body formed by a plurality of parallel single batteries, wherein the inner cavity of each single battery comprises an electrolyte area and a gas area; the battery pack is characterized in that the supporting device is used for stably supporting the battery pack body, and the supporting device is provided with an electrolyte chamber used for communicating the electrolyte areas of the single batteries.

2. The supporting device for a large-capacity battery according to claim 1, wherein the supporting device is a rectangular box body, the width dimension of the rectangular box body is larger than or equal to that of a single battery, the inner cavity of the rectangular box body is an electrolyte chamber, and a plurality of through holes for communicating the electrolyte area of the single battery with the electrolyte chamber are formed in the top wall of the rectangular box body.

3. The support device for a high capacity battery as claimed in claim 1, wherein the support device comprises a rectangular frame and an elongated hollow tube fixed within the rectangular frame; the width dimension of the rectangular frame is larger than or equal to that of the single battery, two ends of the slender hollow tube are closed, the inner cavity is an electrolyte chamber, and a plurality of through holes for communicating the electrolyte area of the single battery with the electrolyte chamber are formed in the top wall of the slender hollow tube.

4. A support device for a high capacity battery as claimed in any one of claims 1 to 3, wherein the support device is provided with a liquid injection assembly for injecting electrolyte into the electrolyte chamber; the liquid injection assembly comprises a liquid injection pipe and a liquid injection valve, wherein the liquid injection pipe is communicated with the electrolyte chamber, and the liquid injection valve is arranged on the liquid injection pipe.

5. The utility model provides a large capacity battery, its characterized in that includes the group battery main part of constituteing by a plurality of monomer batteries that connect in parallel and the strutting arrangement of any one of claims 1 to 4, strutting arrangement sets up in group battery main part below, carries out stable support to the group battery main part, and this strutting arrangement's electrolyte cavity communicates each monomer battery electrolyte district, is provided with on each monomer battery's the top or the strutting arrangement and lets out and explodes the subassembly for the thermal runaway flue gas is discharged when thermal runaway takes place for arbitrary monomer battery.

6. The high-capacity battery according to claim 5, wherein the top of each single battery is provided with an explosion venting port, and the explosion venting assembly comprises an explosion venting main pipe, a plurality of explosion venting branch pipes and a plurality of explosion venting parts; one end of each explosion venting branch pipe is connected to the explosion venting port of each single battery, the other end of each explosion venting branch pipe is connected with the explosion venting main pipe, and the explosion venting parts are arranged on the explosion venting branch pipes or in the explosion venting ports.

7. The high capacity battery of claim 5, wherein the explosion venting assembly includes an explosion venting tube in communication with the electrolyte chamber and an explosion venting portion disposed on the explosion venting tube.

8. The high-capacity battery according to claim 6 or 7, wherein the explosion venting portion is an explosion venting film or an explosion venting valve.

9. An energy storage device comprising a battery rack and a plurality of high capacity batteries according to any one of claims 5 to 8; the plurality of large-capacity batteries are fixed on the battery rack in an insulating manner and distributed in a matrix mode, at least one upright post of the battery rack is of a hollow structure, explosion venting components of the plurality of large-capacity batteries are connected with an inner cavity of the hollow upright post through the collecting pipe, when any single battery is out of control, the explosion venting components are opened, and the collecting pipe and the hollow upright post are used as channels for discharging smoke in out of control in heat supply.

10. The energy storage device of claim 9, wherein all of the posts are hollow structures, and a reservoir for collecting electrolyte is connected to the bottom of the posts.