Safety release structure and gas treatment method for an energy storage container

Abstract

The present application discloses a safety release structure for an energy storage container, which includes a container, at least two battery racks arranged in the container, and a safety release device arranged in the container and connected to the battery racks. The safety release device includes a water tank connected to a battery explosion relief valve on the battery rack, and a cooling and adsorption device connected to the water tank. The present application realizes the temperature reduction and step-by-step adsorption of dangerous combustible gases generated by battery thermal runaway through the water tank and multiple adsorption chambers, greatly reducing their flammability, achieving the purpose of waste gas purification, and enabling safe discharge. Moreover, the safety release device is placed in the channel formed by the battery racks, thereby greatly improving the space utilization rate inside the box body, and further improving the power and capacity of the energy storage container.

Description

Technical Field

[0001] This application relates to the technical field of waste gas treatment, and specifically relates to a safety release structure and a gas treatment method for an energy storage container. Background Art

[0002] The energy storage system is a key part of solving problems such as large-scale access of renewable energy, curtailment of wind and photovoltaic power, etc. It is an essential part of the development of distributed energy, smart grid and energy internet, and is also an important supporting part for solving peak shaving and valley filling of conventional power, and improving the efficiency, safety and economy of conventional energy power generation and power transmission.

[0003] When the battery in the energy storage container needs to dissipate heat during operation, or when it cannot dissipate heat or is damaged by problems and burns out, a large amount of harmful and combustible gases will be generated, which will directly disperse into the vehicle and pose a hazard to the health of the personnel in the vehicle. However, in order to improve space utilization, most existing energy storage containers do not have a direct device for treating harmful and combustible gases.

[0004] The patent with the application number CN211435619U discloses a lithium battery harmful gas recovery device, which relates to the technical field of lithium battery recycling. It includes a recovery box, a hollow rotating shaft is arranged in the middle of the inner cavity of the recovery box, a number of hollow stirring rods are evenly arranged on the hollow rotating shaft, a number of first air outlets are evenly arranged on the hollow stirring rods, a trachea is arranged in the inner cavity of the hollow rotating shaft, one end of the hollow rotating shaft penetrates through the recovery box and extends to the outside thereof, a first bevel gear is arranged at one end of the hollow rotating shaft, the first bevel gear meshes with a second bevel gear, a rotating rod is arranged at the top of the second bevel gear, a third bevel gear is arranged at the top of the rotating rod, the third bevel gear meshes with a fourth bevel gear, a motor is arranged on one side of the fourth bevel gear, a grid pipe is arranged in the upper part of the inner cavity of the recovery box, and a number of nozzles are arranged at the bottom of the grid pipe. This solution only collects the gas and does not process it. Summary of the Invention

[0005] In order to solve the above technical problems, the technical solution adopted in this application is as follows:

[0006] This application provides a safety release structure for an energy storage container, which includes a container, at least two battery racks arranged in the container, and a safety release device arranged in the container and connected to the battery racks. The safety release device includes a water tank connected to the battery explosion relief valve on the battery rack, and a cooling and adsorption device connected to the water tank.

[0007] In the embodiment provided by this application, the container includes three opening doors and one non-opening door, namely two first opening doors along the length direction, one second opening door along the width direction, and the non-opening door along the width direction. The two battery racks are respectively arranged at positions close to both the first opening door and the non-opening door at the same time, and a channel for placing the safety release device is formed between the battery racks.

[0008] In the embodiment provided by the present application, the water tank is connected to the battery explosion relief valve on the battery rack through a first connecting pipe; the pipe orifice of the first connecting pipe extends below the water level of the water tank. The cooling and adsorption device includes: a cooling chamber connected to the water tank through a second connecting pipe, a first adsorption chamber connected to the cooling chamber through a third connecting pipe, and a second adsorption chamber connected to the first adsorption chamber through the third connecting pipe; the pipe orifice of the second connecting pipe is located above the water level; an exhaust port is provided on the second adsorption chamber. The cooling chamber, the first adsorption chamber, and the second adsorption chamber are arranged in a stepped manner, with the cooling chamber, the first adsorption chamber, and the second adsorption chamber arranged in sequence from top to bottom. The cooling chamber, the first adsorption chamber, and the second adsorption chamber are all of a drawer type structure. The drawer type structure includes a bin body and a drawer matching the bin body. A silica gel is coated on the inner side of the surface where the bin body and the drawer are sealed.

[0009] In the embodiment provided by the present application, the cooling chamber, the first adsorption chamber, and the second adsorption chamber are arranged in parallel. The water tank, the cooling chamber, the first adsorption chamber, and the second adsorption chamber are arranged on a slide rail.

[0010] In the embodiment provided by the present application, the water tank is filled with water, or one of propylene carbonate and ethylene carbonate. The cooling chamber is filled with a cooling material; the cooling material is one or a combination of ceramics and honeycomb ceramics. Both the first adsorption chamber and the second adsorption chamber are filled with an adsorption material; the adsorption material is one or more of activated carbon, sodium aluminosilicate hydrate, porous silicon dioxide, molecular sieve, soda lime, and adsorption resin.

[0011] In the embodiment provided by the present application, the first connecting pipe, the second connecting pipe, and the third connecting pipe are all filled with an adsorption material.

[0012] In the embodiment provided by the present application, the connections of the first connecting pipe, the second connecting pipe, and the third connecting pipe are all locked and fixed through lock nuts.

[0013] In the embodiment provided by the present application, a water level gauge is provided on the side of the water tank.

[0014] In the embodiment provided by the present application, a water injection pipe is provided above the water tank. A valve is provided on the water injection pipe.

[0015] In the embodiment provided by the present application, an electrical compartment is further included in the container and is arranged near the second opening door; an isolation door is provided between the electrical compartment, the battery rack, and the safety release device. The electrical compartment includes a busbar cabinet, an inverter, a power distribution cabinet, a fire protection system, and an air conditioning system.

[0016] In the embodiment provided by the present application, corner fittings and support frames are provided at the four corners below the container.

[0017] The present application also provides a gas treatment method for an energy storage container, including the following steps:

[0018] S100. When the battery undergoes thermal runaway, the combustible gas enters the water tank through the explosion vent and the first connecting pipe;

[0019] S200. The liquid in the water tank cools down and adsorbs and dissolves the combustible gas. After cooling down, adsorbing, and dissolving, the gas enters the cooling chamber through the second connecting pipe;

[0020] S300. The cooling chamber cools down the gas again, and then the gas is adsorbed through the first adsorption chamber and the second adsorption chamber in sequence through the third connecting pipe;

[0021] S400. After the second adsorption chamber completes adsorption, the gas is discharged through the exhaust port.

[0022] The present application realizes the cooling and step-by-step adsorption of the dangerous combustible gas generated by the thermal runaway of the battery through the water tank and multiple adsorption chambers, greatly reducing its flammability, achieving the purpose of purifying the waste gas, and enabling safe discharge; moreover, the safety release device of the present application is placed in the channel formed by the battery rack, thereby greatly improving the space utilization rate inside the box body, and further improving the power and capacity of the energy storage container.

[0023] Other advantages, objectives, and features of the present application will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a top view of the energy storage container of the embodiment of the present application without the top cover.

[0026] Figure 2 It is a schematic diagram of the energy storage container of the embodiment of the present application.

[0027] Figure 3 It is a schematic connection diagram of the battery and the safety release device of the embodiment of the present application.

[0028] Figure 4 It is a schematic connection diagram of the explosion vent of the battery and the water tank of the embodiment of the present application.

[0029] Figure 5Schematic diagram of the interconnection of the battery explosion vents in the embodiments of the present application.

[0030] Figure 6 Schematic diagram of the overall connection of the safety release device in the embodiments of the present application Figure 1 。

[0031] Figure 7 Schematic diagram of the drawer-type structure in the embodiments of the present application.

[0032] Figure 8 Schematic diagram of the structure of the connecting pipe joint in the embodiments of the present application.

[0033] Figure 9 Side sectional view of the water tank in the embodiments of the present application.

[0034] Figure 10 Schematic diagram of the overall connection of the safety release device in the embodiments of the present application Figure 2 。 Detailed implementation manners

[0035] The following further describes the present application in detail with reference to the accompanying drawings, so that those skilled in the art can implement it according to the description in the specification.

[0036] It should be understood that the terms such as "having", "including" and "comprising" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0037] The terms "first" and "second" etc. in the description and claims of the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order of the objects.

[0038] As Figures 1 to 6 shown, the present application provides a safety release structure for an energy storage container, including a container 21, at least two battery racks 13 arranged in the container 21, a battery compartment 19 formed, a safety release device arranged in the container 21 and connected to the battery racks 13, the safety release device including a water tank 1 connected to the explosion vent valves of the batteries 18 on the battery racks 13, and a cooling and adsorption device connected to the water tank 1.

[0039] As Figure 2 shown, in the embodiment provided by the present application, the container 21 includes three opening doors and one non-opening door, namely two first opening doors 29 / 30 along the length direction, one second opening door 31 along the width direction, and a non-opening door 9 along the width direction, which is convenient for subsequent maintenance.

[0040] In the embodiments provided by the present application, the two battery racks 13 are respectively arranged at positions close to the first opening doors 29 / 30 and the non-opening door 9 at the same time. A channel for placing the safety release device is formed between the battery racks, which facilitates the installation of the battery racks and the maintenance of the batteries, improves the space utilization rate, and further improves the power and capacity of the energy storage container.

[0041] As Figure 3 , 4 , 6, 9 show that in the embodiments provided by the present application, the water tank 1 is connected to the explosion relief valve of the battery 18 on the battery rack 13 through the first connecting pipe 11; the pipe orifice of the first connecting pipe 11 extends below the liquid level of the water tank 1, which is convenient for fully cooling, adsorbing and dissolving the gas through the liquid.

[0042] As Figure 2 , 3 , 6, 9 show that in the embodiments provided by the present application, the cooling and adsorption device includes: a cooling chamber 2 connected to the water tank 1 through a second connecting pipe 12, a first adsorption chamber 3 connected to the cooling chamber 2 through a third connecting pipe 16, and a second adsorption chamber 4 connected to the first adsorption chamber 3 through the third connecting pipe 16; the pipe orifice of the second connecting pipe 12 is located above the liquid level; an exhaust port is provided on the second adsorption chamber.

[0043] Optionally, the cooling chamber, the first adsorption chamber and the second adsorption chamber are arranged in a stepped manner, and are the cooling chamber 2, the first adsorption chamber 3, and the second adsorption chamber 4 in sequence from top to bottom. The cooling chamber 2 is supported by a cooling chamber support frame 14, the first adsorption chamber 3 is supported by a first adsorption chamber support frame 15, and the second adsorption chamber 4 is placed on the bottom surface of the container 21.

[0044] Optionally, as Figure 7 shows, the cooling chamber 2, the first adsorption chamber 3 and the second adsorption chamber 4 are all of a drawer type structure. The drawer type structure includes a chamber body 5 and a drawer 6 matching the chamber body, which is convenient for replacing the cooling or adsorption material.

[0045] The inner side of the surface 7 where the chamber body 5 is sealed with the drawer 6 is coated with silica gel.

[0046] In the embodiments provided by the present application, as Figure 10 shows, the cooling chamber 2, the first adsorption chamber 3 and the second adsorption chamber 4 are arranged in parallel. The water tank, the cooling chamber, the first adsorption chamber and the second adsorption chamber are arranged on the slide rail 111.

[0047] In the embodiments provided by the present application, the water tank 1 is filled with water, or one of propylene carbonate and ethylene carbonate is injected.

[0048] The cooling chamber 2 is filled with a cooling material; the cooling material is one or a combination of ceramics and honeycomb ceramics.

[0049] Both the first adsorption chamber 3 and the second adsorption chamber 4 are filled with an adsorption material; the adsorption material is one or more of activated carbon, sodium aluminosilicate hydrate, porous silica, molecular sieve, soda lime, and adsorption resin.

[0050] Optionally, in the embodiments provided in the present application, the first connecting pipe 11, the second connecting pipe 12, and the third connecting pipe 16 are all filled with an adsorption material.

[0051] Optionally, as Figure 8 shown, in the embodiments provided in the present application, the joints of the first connecting pipe 11, the second connecting pipe 12, and the third connecting pipe 16 are all locked and fixed by lock nuts 8.

[0052] Optionally, as Figure 3 shown, in the embodiments provided in the present application, a liquid level gauge 32 is provided on the side of the water tank 1 to facilitate observing the liquid level in the water tank.

[0053] In the embodiments provided in the present application, a water injection pipe 10 is provided above the water tank 1. A valve 17 is provided on the water injection pipe 10 to realize liquid injection or liquid replacement of the water tank through the water injection pipe.

[0054] In the embodiments provided in the present application, the container 21 further includes an electrical compartment 33 provided near the second opening door; an isolation door 28 is provided between the electrical compartment 33, the battery rack 13, and the safety release device. The electrical compartment 33 includes a busbar cabinet 22, an inverter 23, a power distribution cabinet 25, a fire protection system 26, and an air conditioning system 27.

[0055] In the embodiments provided in the present application, corner fittings 20 and support frames 24 are provided at the four corners below the container.

[0056] As Figures 1 to 9 shown, the working principle of the present application is as follows: S100, when the battery undergoes thermal runaway, the combustible gas enters the water tank through the explosion vent valve and the first connecting pipe; S200, the liquid in the water tank cools down and adsorbs and dissolves the combustible gas. After cooling down and adsorbing and dissolving, the gas enters the cooling chamber through the second connecting pipe; S300, the cooling chamber cools down the gas again, and then the gas is adsorbed through the third connecting pipe, the first adsorption chamber, and the second adsorption chamber in sequence; S400, after the second adsorption chamber completes adsorption, the gas is discharged through the exhaust port.

[0057] Although the embodiments of the present application have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and their equivalents, the present application is not limited to the specific details and the illustrated examples herein.

Claims

1. A safety release structure for an energy storage container, comprising a container, at least two battery racks disposed within the container, and a safety release device disposed within the container and connected to the battery racks, characterized in that, The safety release device includes a water tank connected to the battery explosion vent on the battery rack, and a cooling and adsorption device connected to the water tank; The container includes three opening doors and one non-opening door, namely two first opening doors along the length direction, one second opening door along the width direction, and the non-opening door along the width direction; The two battery racks are respectively arranged at positions close to the first opening door and the non-opening door at the same time, and a channel for placing the safety release device is formed between the battery racks; The water tank is connected to the battery explosion vent on the battery rack through a first connecting pipe; the pipe orifice of the first connecting pipe extends below the liquid level of the water tank; The cooling and adsorption device includes: a cooling chamber connected to the water tank through a second connecting pipe, a first adsorption chamber connected to the cooling chamber through a third connecting pipe, and a second adsorption chamber connected to the first adsorption chamber through the third connecting pipe; The pipe orifice of the second connecting pipe is located above the liquid level; An exhaust port is provided on the second adsorption chamber; The cooling chamber, the first adsorption chamber and the second adsorption chamber are arranged in a stepped manner, and are the cooling chamber, the first adsorption chamber and the second adsorption chamber in sequence from top to bottom; or, the cooling chamber, the first adsorption chamber and the second adsorption chamber are arranged side by side; The water tank, the cooling chamber, the first adsorption chamber and the second adsorption chamber are arranged on a slide rail.

2. The safety release structure of an energy storage container as claimed in claim 1, wherein, The cooling chamber, the first adsorption chamber and the second adsorption chamber are all of a drawer type structure.

3. The safety release structure of an energy storage container as described in claim 2, characterized in that, The drawer type structure includes a chamber body and a drawer matching the chamber body.

4. The safety release structure of an energy storage container according to claim 3, characterized in that, Silica gel is coated on the inner side of the surface where the chamber body is sealed with the drawer.

5. The safety release structure of an energy storage container according to claim 1, characterized in that, The water tank is filled with water, or one of propylene carbonate and ethylene carbonate.

6. The safety release structure of an energy storage container as described in claim 1, characterized in that, The cooling chamber is filled with a cooling material; the cooling material is honeycomb ceramics.

7. The safety release structure of an energy storage container according to claim 1, characterized in that, Both the first adsorption chamber and the second adsorption chamber are filled with an adsorption material; The adsorption material is one or more of activated carbon, sodium aluminosilicate hydrate, porous silica, molecular sieve, soda lime, and adsorption resin.

8. The safety release structure of an energy storage container as claimed in claim 1, wherein, The first connecting pipe, the second connecting pipe, and the third connecting pipe are all filled with an adsorption material.

9. The safety release structure of an energy storage container as claimed in claim 1, wherein, The joints of the first connecting pipe, the second connecting pipe, and the third connecting pipe are all locked and fixed by lock nuts.

10. The safety release structure of an energy storage container according to claim 1, wherein A liquid level gauge is provided on the side of the water tank.

11. The safety release structure of an energy storage container as described in claim 1, characterized in that, A water injection pipe is provided above the water tank.

12. The safety release structure of an energy storage container according to claim 11, wherein, A valve is provided on the water injection pipe.

13. The safety release structure of an energy storage container as described in claim 1, characterized in that, An electrical compartment is further included in the container and is arranged near the second opening door; An isolation door is provided between the electrical compartment and the battery rack and the safety release device.

14. The safety release structure of an energy storage container according to claim 13, characterized in that, The electrical compartment includes a busbar cabinet, an inverter, a power distribution cabinet, a fire protection system, and an air conditioning system.

15. The safety release structure of an energy storage container according to claim 1, characterized in that, Corner fittings and support frames are provided at the four corners below the container.

16. A gas treatment method for an energy storage container, characterized in that, Adopting the safety release structure of the energy storage container as described in any one of claims 1 to 15, includes the following steps: S100. When the battery undergoes thermal runaway, the combustible gas enters the water tank through the explosion vent and the first connecting pipe; S200. The liquid in the water tank cools down and adsorbs and dissolves the combustible gas. After cooling down and adsorbing and dissolving, the gas enters the cooling chamber through the second connecting pipe; S300. The cooling chamber cools down the gas again, and then the gas is adsorbed through the third connecting pipe in sequence by the first adsorption chamber and the second adsorption chamber; S400. After the second adsorption chamber completes adsorption, the gas is discharged through the exhaust port.

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