CN211675971U - Lithium iron phosphate energy storage power station battery module structure protected by fine water mist fire extinguishing technology - Google Patents
Lithium iron phosphate energy storage power station battery module structure protected by fine water mist fire extinguishing technology Download PDFInfo
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- CN211675971U CN211675971U CN201921320038.1U CN201921320038U CN211675971U CN 211675971 U CN211675971 U CN 211675971U CN 201921320038 U CN201921320038 U CN 201921320038U CN 211675971 U CN211675971 U CN 211675971U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a lithium iron phosphate energy storage power station battery module structure protected by a water mist fire extinguishing technology, which comprises a battery module shell, wherein a battery is arranged at the inner side of the battery module shell, the distance from the upper surface of the battery to the inner surface of a top plate of the battery module shell is more than or equal to 50cm, and the distance from the side surface of the battery to the inner surface of a side plate of the battery module shell is more than or equal to 20 cm; an opening is formed in one side plate of the battery module shell, the water mist spray head extends into the battery module shell from the opening, and the spraying direction of the water mist spray head faces to the area between the upper surface of the battery and the inner surface of the top plate of the battery module shell; and mesh areas are arranged on other side plates of the battery module shell. The utility model discloses can lean on the prefabricated cabin conflagration of lithium iron phosphate energy storage power station battery of putting out fast.
Description
Technical Field
The utility model relates to a lithium iron phosphate energy storage power station battery module structure that protects with thin water smoke fire extinguishing technology belongs to the technique of carrying out fire protection to lithium iron phosphate energy storage power station battery module.
Background
The lithium iron phosphate battery has the advantages of high energy density, high output voltage, long cycle life, small environmental pollution and the like, and is widely used in various electronic equipment, electric automobiles and electrochemical energy storage. The accumulated loading capacity of the lithium iron phosphate energy storage power station is steadily increased, the loading capacity exceeds 2000MW by 2020, the annual growth rate is close to 70%, once a fire disaster occurs, the reliability and safety of power supply are seriously damaged, and the social influence and harm are great. At present, no fire extinguishing equipment capable of effectively extinguishing fire disasters of the battery prefabricated cabin of the lithium iron phosphate energy storage power station exists in the world, and a large number of internal and external fire disasters of the battery prefabricated cabin of the energy storage power station are proved well.
SUMMERY OF THE UTILITY MODEL
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the utility model provides a lithium iron phosphate energy storage power station battery module structure protected by a water mist fire extinguishing technology.
The technical scheme is as follows: in order to achieve the above object, the utility model adopts the following technical scheme:
a lithium iron phosphate energy storage power station battery module structure protected by a water mist fire extinguishing technology comprises a battery module shell, wherein a battery is arranged on the inner side of the battery module shell, the distance from the upper surface of the battery to the inner surface of a top plate of the battery module shell is more than or equal to 50cm, and the distance from the side surface of the battery to the inner surface of a side plate of the battery module shell is more than or equal to 20 cm;
an opening (used for extending a water mist spray head) is formed in one side plate of a battery module shell, the top edge of the opening is as high as the inner surface of the top plate of the battery module shell, the bottom edge of the opening is as high as the upper surface of a battery or higher than the upper surface of the battery (the bottom edge of the opening is designed to be as high as the upper surface of the battery generally), and the distance between two vertical edges of the opening and the two vertical edges of the side plate is 1/5-1/3 of the width of the side plate;
the battery module shell is characterized in that mesh areas are arranged on other side plates of the battery module shell, the bottom edges of the mesh areas are as high as the upper surface of a battery or higher than the upper surface of the battery, the top edges of the mesh areas are lower than the inner surface of the top plate of the battery module shell by 15-20 cm (the area above the top edges of the mesh areas is an opening forbidding area), two vertical edges of the mesh areas are as high as two vertical edges of the side plates (two sides of the side plates can be slightly shorter), the opening rate of the mesh areas is 20-30%, and generally, the diameter of the mesh areas is not required.
Compared with the prior art, the method has the advantages that the existing battery module shell is subjected to the treatment of opening and punching to form the mesh area, the distance between the battery and the inner wall of the battery module shell is limited, and other processes are not performed on the existing battery module shell. The situation that liquid splashes when a battery in a lithium iron phosphate energy storage power station catches fire is known, and toxic and inflammable aerial fog is accompanied. The distance between the battery and the inner wall of the battery module shell is designed in such a way that the liquid splashing condition can be limited in the battery module shell, the liquid cannot splash to the mesh blocking the mesh area, and therefore the distance between the battery and the inner wall of the battery module shell is considered to be the minimum distance, and after a plurality of tests, when the distance between the top part of the battery and the inner wall of the battery module shell is more than 50cm and the distance between the side surfaces of the battery and the inner wall of the battery module shell is more than 20cm, the liquid hardly splashes to the area (namely the battery prefabrication cabin) outside the battery module shell; certainly, this interval is also not fit for too big, and too big can increase the size of whole battery module shell, has increased the volume in prefabricated cabin of battery indirectly, and we propose that the top interval is more suitable at 50 ~ 80cm, side interval at 20 ~ 36cm, and this interval also relatively does benefit to the water mist that water mist shower nozzle jetted and can permeate the mesh district and spread to the prefabricated cabin of battery.
When a mesh area is designed, a hole opening forbidding area with the top of 15-20 cm is designed, certain rebound is generated when liquid splashes to the top of a battery module shell, if the liquid is not shielded by the side face, the liquid is easily splashed to the outer area of the battery module shell through the mesh area, and the effect of limiting the liquid splashing condition in the battery module shell is influenced; through observation and multiple tests of the liquid splashing condition of the battery in fire, the effect of the design forbidding the hole opening area is very obvious and effective.
When a battery is in a fire, toxic and flammable aerial fog can be accumulated in the battery module shell, and the probability of explosion of the battery can be increased along with the increase of the aerial fog due to the rise of the temperature; therefore, it is desirable to enable the aerosol to exit the battery module housing while avoiding as much as possible a rapid rise in temperature; aiming at the problem, a mesh area is designed, so that aerial fog can be discharged quickly, and the temperature rising speed of the battery is reduced; meanwhile, when the water mist spray head starts, water mist can be diffused into the battery prefabricated cabin through the mesh area to cool the battery prefabricated cabin. Therefore, the aperture ratio of the mesh area is required to a certain extent, the mesh area is too large to achieve the purpose of preventing liquid from splashing, and the mesh area is too small to discharge aerial fog conveniently; through observation and multiple tests on the aerial fog discharge condition, the opening rate of the opening area is designed to be 20-30% (in the investigation area, the hollow area of the opening accounts for the percentage of neps in the investigation area).
The mesh area is not designed on the side plate of the opening, because the side surface is provided with the opening, and the ventilation function is sufficient; meanwhile, the water mist spray head is arranged at the opening area, and the sprayed water mist is less likely to overflow from the side surface; however, this area is not limited to the area where the mesh can be set, and the mesh area may be set with reference to other areas; it is not advisable to have the openings extend all the way through the side, in view of the splashing of the liquid.
Preferably, the distance between two vertical edges of the opening and two vertical edges of the side plate is 1/4 of the width of the side plate, and the opening rate of the mesh area is 25%; this value is the preferred value we have tried out.
Preferably, the battery module shell further comprises a water mist spray head, the water mist spray head extends into the battery module shell from the opening, and the spray direction of the water mist spray head faces to the area between the upper surface of the battery and the inner surface of the top plate of the battery module shell.
Specifically, the water mist spray head is of a flat fan-shaped structure, a row of spray nozzles are arranged on a fan-shaped curved surface along an arc direction, the spraying directions of all the spray nozzles are in a plane, and the plane is generally recommended to be parallel to the upper surface of the battery.
For present ordinary circular shower nozzle, we have designed thin water smoke shower nozzle, be on the one hand in order to reduce the thickness of whole thin water smoke shower nozzle, make it can install in the battery module shell smoothly under the little circumstances of change to current battery module shell, on the other hand sets up one row of nozzle along the pitch arc and also can let thin water smoke distribute battery module shell inner space rapidly, and what it jetted is the thin water smoke of sector that has certain thickness. If a common circular nozzle is adopted, on one hand, the sprayed water mist is in an inverted cone shape, most of the water mist can be sprayed onto the inner wall of the shell of the battery module to form large water drops and water flow, and the fire extinguishing effect of the water mist is lost; on the other hand, it is inconvenient to install into the battery module. The design of the water mist spray head and the arrangement of the spraying direction of the nozzle of the water mist spray head enable the generated water mist to be rapidly diffused in the shell of the battery module, and simultaneously, the water mist can be easily diffused out from a mesh area, so that the water accumulation amount of the water mist spray head on the battery is reduced, and the battery is protected to a certain degree. Regarding the standard of the water mist, the relevant fire-fighting standard of China is referred.
Preferably, the plane of all the spray nozzles is parallel to the upper surface of the battery, and the plane is within 2cm above and below the upper surface of the battery and the middle layer of the inner surface of the top plate of the battery module shell, so that the fine water mist can be more easily and uniformly diffused.
Preferably, the central angle corresponding to the fan-shaped curved surface of the water mist spray head is 100-180 degrees.
Preferably, the nozzle is circular.
Specifically, after the water mist spray head extends into the battery module shell from the center of the opening, the opening has an area which is not blocked.
Has the advantages that: the utility model provides a lithium iron phosphate energy storage power station battery module structure that protects with thin water smoke fire extinguishing technology can spray thin water smoke to the battery module shell when the conflagration takes place, and thin water smoke fire extinguishing technology is the effective method of putting out lithium iron phosphate energy storage power station battery prefabricated cabin conflagration to can not cause the damage to the battery, therefore the utility model discloses can lean on putting out lithium iron phosphate energy storage power station battery prefabricated cabin conflagration fast; the scheme firstly designs an idea of spraying the water mist from one side surface and diffusing the water mist from other side surfaces, and solves the problem that the water mist is easy to collide with a solid structure in the lithium iron phosphate battery module to form water flow and damage the battery; then, a battery module shell and a water mist spray head structure are designed, and the problem of installation of the spray head in a narrow space is solved under the condition that the existing battery module shell is not changed; the water mist diffused to the outside of the shell of the battery module can help to solve the fire extinguishing problem of other objects in the prefabricated cabin; because what adopt is that the water source is put out a fire, consequently the utility model relates to a react rapid extinguishing device can effectively avoid lithium iron phosphate battery module because the thermal runaway produces various combustible gases, avoids these combustible gases can not detect as early as possible and other continuous problems that produce.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic perspective view of a battery module housing (the top plate is not shown);
fig. 3 is a schematic top view of a battery module housing (top plate not shown);
FIG. 4 is a schematic view of a side panel provided with an opening;
FIG. 5 is a schematic view of a side plate with a mesh area;
FIG. 6 is a schematic top view of the water mist head and the water mist sprayed therefrom;
FIG. 7 is a schematic diagram showing a side view of a water mist head;
FIG. 8 is another schematic side view of the water mist head;
the figure includes: 1-a battery; 2-a battery module housing; 3-water mist spray head; 4-opening; 5-a mesh area; 6-inner surface of top plate of battery module shell, 3-1-nozzle; 3-2-pipe network connector; 3-3-spraying water mist from the water mist spray head.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, 2, 3 is a lithium iron phosphate energy storage power station battery module structure that carries out protection with thin water smoke fire extinguishing technology, including battery module shell 2 and a thin water smoke shower nozzle 3, battery 1 sets up in battery module shell 2 inboardly, and the distance of battery 1 upper surface apart from 2 roof internal surfaces of battery module shell is 50cm, and the distance of battery 1 side surface apart from 2 curb plate internal surfaces of battery module shell is 20 cm.
As shown in fig. 4, an opening 4 is provided on one side plate of the battery module housing 2, the top edge of the opening 4 is in accordance with the height of the inner surface of the top plate of the battery module housing 2, the bottom edge of the opening 4 is in accordance with the height of the upper surface of the battery 1, and the distance between two vertical edges of the opening 4 and two vertical edges of the side plate is 1/4 of the width of the side plate; the water mist head 3 extends into the battery module case 2 from the opening 4, and the spraying direction of the water mist head 3 is directed toward the area between the upper surface of the battery 1 and the inner surface of the top plate of the battery module case 2.
As shown in fig. 5, the other side plates of the battery module housing 2 are provided with mesh regions 5, the bottom edges of the mesh regions 5 are as high as the upper surface of the battery 1, the top edges of the mesh regions 5 are lower than the inner surface of the top plate of the battery module housing 2 by 15-20 cm, two vertical edges of the mesh regions 5 are as high as the two vertical edges of the side plates, and the aperture ratio of the mesh regions 5 is 25%.
As shown in fig. 6, 7 and 8, the water mist head 3 is of a flat fan-shaped structure, a row of nozzles 3-1 are arranged on a fan-shaped curved surface along an arc direction, and the spraying directions of all the nozzles 3-1 (which can be generally arranged in a certain area along the radius direction of the fan-shaped curved surface) are in a plane, the plane is parallel to the upper surface of the battery 1, and the upper surface of the battery 1 and the middle layer of the inner surface of the top plate of the battery module shell 2 are within the range of 1cm up and down. The central angle corresponding to the fan-shaped curved surface of the water mist spray head 3 is 100-180 degrees. The nozzle 3-1 is circular. The water mist spray head 3 is connected with a pipe network through a pipe network connector 3-2, and the water mist 3-3 sprayed by the water mist spray head is a sector water mist with a certain thickness.
After the water mist spray head 3 extends into the battery module shell 2 from the center of the opening 4, the opening 4 has an unblocked area.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (7)
1. The utility model provides a lithium iron phosphate energy storage power station battery module structure that protects with thin water smoke fire extinguishing technology which characterized in that: the battery pack comprises a battery module shell (2), wherein a battery (1) is arranged on the inner side of the battery module shell (2), the distance from the upper surface of the battery (1) to the inner surface of a top plate of the battery module shell (2) is more than or equal to 50cm, and the distance from the side surface of the battery (1) to the inner surface of a side plate of the battery module shell (2) is more than or equal to 20 cm;
an opening (4) is formed in one side plate of the battery module shell (2), the height of the top edge of the opening (4) is consistent with that of the inner surface of the top plate of the battery module shell (2), the height of the bottom edge of the opening (4) is consistent with that of the upper surface of a battery (1) or higher than that of the upper surface of the battery (1), and the distance between two vertical edges of the opening (4) and the two vertical edges of the side plate is 1/5-1/3 of the width of the side plate;
be provided with mesh region (5) on other curb plates of battery module shell (2), the base of mesh region (5) is unanimous with battery (1) upper surface height or is higher than battery (1) upper surface height, and the topside of mesh region (5) is less than battery module shell (2) roof internal surface height 15 ~ 20cm, two perpendicular limits of mesh region (5) with two perpendicular limits of curb plate are unanimous, and the percent opening of mesh region (5) is 20 ~ 30%.
2. The lithium iron phosphate energy storage power station battery module structure protected by the water mist fire extinguishing technology according to claim 1, characterized in that: the distance between the two vertical edges of the opening (4) and the two vertical edges of the side plate is 1/4 of the width of the side plate, and the opening rate of the mesh area (5) is 25 percent.
3. The lithium iron phosphate energy storage power station battery module structure protected by the water mist fire extinguishing technology according to claim 1, characterized in that: the battery module comprises a battery module shell (2) and is characterized by further comprising a fine water mist nozzle (3), wherein the fine water mist nozzle (3) extends into the battery module shell (2) from an opening (4), and the spraying direction of the fine water mist nozzle (3) faces to an area between the upper surface of the battery (1) and the inner surface of a top plate of the battery module shell (2).
4. The lithium iron phosphate energy storage power station battery module structure protected by the water mist fire extinguishing technology according to claim 3, characterized in that: the water mist spray head (3) is of a flat fan-shaped structure, a row of spray nozzles (3-1) are arranged on the fan-shaped curved surface along the arc direction, and the spraying directions of all the spray nozzles (3-1) are in the same plane.
5. The lithium iron phosphate energy storage power station battery module structure protected by the water mist fire extinguishing technology according to claim 3, characterized in that: the spraying direction of all the nozzles (3-1) is parallel to the upper surface of the battery (1), and the plane is within 2cm above and below the upper surface of the battery (1) and the middle layer of the inner surface of the top plate of the battery module shell (2).
6. The lithium iron phosphate energy storage power station battery module structure protected by the water mist fire extinguishing technology according to claim 4, characterized in that: the nozzle (3-1) is circular.
7. The lithium iron phosphate energy storage power station battery module structure protected by the water mist fire extinguishing technology according to claim 3, characterized in that: after the water mist spray head (3) extends into the battery module shell (2) from the center of the opening (4), the opening (4) has an unblocked area.
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| CN201921320038.1U CN211675971U (en) | 2019-08-14 | 2019-08-14 | Lithium iron phosphate energy storage power station battery module structure protected by fine water mist fire extinguishing technology |
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| CN201921320038.1U CN211675971U (en) | 2019-08-14 | 2019-08-14 | Lithium iron phosphate energy storage power station battery module structure protected by fine water mist fire extinguishing technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496334A (en) * | 2019-08-14 | 2019-11-26 | 国网江苏省电力有限公司 | A kind of LiFePO4 energy-accumulating power station battery module structure protected with Water Mist Fire Extinguishing Technique |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496334A (en) * | 2019-08-14 | 2019-11-26 | 国网江苏省电力有限公司 | A kind of LiFePO4 energy-accumulating power station battery module structure protected with Water Mist Fire Extinguishing Technique |
| CN110496334B (en) * | 2019-08-14 | 2024-05-17 | 国网江苏省电力有限公司 | Lithium iron phosphate energy storage power station battery module structure protected by water mist fire extinguishing technology |
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