A circulating fire-fighting liquid-cooled energy storage system

Abstract

The present invention belongs to the technical field of lithium battery energy storage fire fighting system, and specifically relates to a circulating fire fighting liquid cooling energy storage system, which comprises a chiller, a liquid cooling pipeline, a coolant tank and a liquid cooling Pack body, wherein the chiller is used for providing circulating power with coolant and cooling, and the liquid cooling pipeline comprises a chiller liquid inlet pipe, a coolant tank valve, a coolant liquid outlet pipe and two Pack liquid inlet valves; the liquid cooling Pack body comprises a Pack liquid cooling pipe liquid inlet and a Pack fire fighting port, and the Pack liquid cooling pipe liquid inlet and the Pack fire fighting port are connected to the liquid outlet pipeline of the chiller through one of the Pack liquid inlet valves. The device solves the fire fighting problem of the battery cell in the energy storage system after thermal runaway in the prior art, reduces the fire loss of the energy storage system after thermal runaway, improves the safety of the energy storage system, and replaces the liquid cooling method of relying solely on the cooler, thereby greatly saving energy consumption and ensuring the cooling effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium battery energy storage fire fighting systems, and in particular relates to a circulating fire fighting liquid cooling energy storage system. Background Art

[0002] The existing fire-fighting methods for lithium battery energy storage systems are aerosol and perfluoroketone fire-fighting. When a lithium battery energy storage system has thermal runaway, the fire-fighting methods of aerosol and perfluoroketone can only delay it for three to ten minutes. After the fire-fighting medium gas dissipates, the fire cannot be controlled, and the thermal runaway continues to spread. The whole package or the whole cluster is ignited, causing great safety hazards. Therefore, it is necessary to adopt a fire-fighting liquid cooling energy storage system. For liquid cooling, a cooler is generally used to cool the coolant. This cooling method has high energy consumption and poor cooling effect. This phenomenon has become a problem that people in this field need to solve urgently. Summary of the invention

[0003] The purpose of the present invention is to provide a circulating fire-fighting liquid-cooled energy storage system to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a circulating fire-fighting liquid-cooled energy storage system, comprising a chiller, a liquid-cooling pipeline, a coolant tank and a liquid-cooling Pack body, wherein the chiller is used to provide circulating power for the coolant and to cool the liquid, wherein the liquid-cooling pipeline comprises a chiller liquid inlet pipe, a coolant tank valve, a coolant liquid outlet pipe and two Pack liquid inlet valves; wherein the liquid-cooling Pack body comprises a Pack liquid-cooling pipe liquid inlet and a Pack fire-fighting port, wherein the Pack liquid-cooling pipe liquid inlet and the Pack fire-fighting port are connected to the liquid outlet pipeline of the chiller through one of the Pack liquid inlet valves, and the other Pack liquid inlet valve is connected to the liquid outlet pipeline of the chiller through the other Pack liquid inlet valve. The ack inlet valve is connected to the inlet pipeline of the chiller through the coolant outlet pipe, the coolant tank is connected to the coolant outlet pipe through the coolant tank valve, the coolant tank valve and the Pack inlet valve are both electronic three-way valves, the coolant tank is used to replenish the coolant in the liquid cooling circulation system, an explosion-proof pressure relief valve is arranged on the top of the liquid cooling Pack body, a heat exchange mechanism is arranged inside the coolant tank, and includes a motor, an output shaft and a plurality of stirring blades, the plurality of stirring blades are evenly fixedly installed on the outside of the output shaft, and are fixedly connected to the output end of the motor through the output shaft, and the motor is fixedly installed on the inner wall of the coolant tank.

[0005] The present invention further illustrates that a rocking part is provided on both sides of the left and right sides of the output shaft, and the two rocking parts include a slide rail, a slider, a chamber and a tooth plate. A fan tooth is fixed to the outer side of the output shaft, and the fan tooth and the tooth plate are meshed with each other; the slide rail is fixedly installed on the inner wall of the coolant tank, the slider is slidably connected to the inner wall of the slide rail, the tooth plate is fixedly installed on the inner side of the slider, the chamber is fixedly installed on the outer side of the slider, a rocking plate 1 is fixed to the outer side of the chamber, and a rocking plate 2 is connected to the outer side of the rocking plate 1, springs are fixed between the upper and lower sides of the slider and the inner wall of the coolant tank, and a through-shape is formed between the rocking plate 1 and the rocking plate 2.

[0006] The present invention further describes that one side of the shaking plate 1 and the shaking plate 2 are both arc-shaped and are arranged opposite to each other.

[0007] The present invention further illustrates that a sliding hole is opened on the right side of the shaking plate one, and a connecting block is slidably connected in the sliding hole, an elastic spring is fixed between the connecting block and the inner wall of the sliding hole, the connecting block is fixedly connected to the shaking plate two, a squeezing ball is fixed on the outer side of the shaking plate two, and arc blocks are fixed on both sides of the inner wall of the coolant tank; after the shaking plate two moves, the squeezing ball and the arc block contact each other.

[0008] The present invention further illustrates that a through hole is provided in the middle of the shaking plate one, and a sliding rod is slidably connected in the through hole, and the sliding rod runs through the chamber; an air pressure plate is slidably connected to the inner wall of the chamber, and the air pressure plate is fixedly installed on the outer side of the sliding rod, and the sliding rod is fixedly connected to the inner side of the shaking plate two; an electromagnetic plate is fixed to the inner wall of the chamber, and the electromagnetic plate generates magnetism when energized, and the air pressure plate is made of metal.

[0009] The present invention further describes that the inner end of the sliding rod is spherical, and the plurality of stirring blades are all made of elastic material and have spherical outer ends.

[0010] The present invention further describes that the sliding rod contacts the stirring blade after moving to the limit position.

[0011] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the fire-fighting liquid-cooled energy storage system adopted by the present invention solves the fire-fighting problem after thermal runaway of the battery cell in the energy storage system in the prior art, reduces the loss of the energy storage system caused by fire after thermal runaway, improves the safety of the energy storage system, and replaces the cooling method that relies solely on the cooler, greatly improves the heat dissipation effect of the coolant, so as to ensure the effect of subsequent heat exchange and optimize the use effect of the coolant. At the same time, during the movement of the shaking plate, the through hole between the shaking plate one and the shaking plate two allows the coolant to flow back and forth between the two, thereby accelerating the heat dissipation of the coolant, so that the subsequent cooling cycle cooling efficiency is guaranteed;

[0012] The shaking plate one and the shaking plate two squeeze the coolant between them, so that the coolant between them rolls, which greatly improves the heat dissipation speed of the coolant and greatly improves the cooling effect. After the electromagnetic plate is energized, magnetism is generated, thereby applying magnetic attraction to the metal air pressure plate, increasing the squeezing strength of the coolant between the shaking plate one and the shaking plate two, and increasing the rolling strength of the coolant between the two, thereby causing the coolant to dissipate heat violently, and the cooling effect of the subsequent high-frequency circulation coolant cooling the Pack body is maximized. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the internal structure of the coolant tank of the present invention;

[0016] Figure 3 is a plan view of the coolant tank of the present invention;

[0017] Figure 4 It is a schematic diagram of the installation position of the stirring blade of the present invention;

[0018] Figure 5 It is a schematic diagram of the movement direction of the stirring blade and the sliding rod of the present invention;

[0019] Figure 6 is a schematic diagram of the positional relationship between the shaking portion and the stirring blade of the present invention;

[0020] Figure 7 It is a schematic diagram of the internal structure of the shaking part 1 and the chamber of the present invention;

[0021] Figure 8 is a plan view of the shaking portion of the present invention;

[0022] In the figure: 1. chiller; 2. liquid cooling pipeline; 211. chiller liquid inlet pipe; 212. coolant tank valve; 221. coolant outlet pipe; 222. Pack liquid inlet valve; 3. coolant tank; 31. motor; 32. output shaft; 321. fan teeth; 33. stirring blade; 34. slide rail; 341. slider; 35. chamber; 351. air pressure plate; 352. electromagnetic plate; 36. tooth plate; 37. shaking plate one; 371. connecting block; 372. slide rod; 38. shaking plate two; 381. squeeze ball; 39. arc block; 4. liquid cooling Pack body; 41. Pack liquid cooling pipe liquid inlet; 42. Pack fire outlet; 43. explosion-proof pressure relief valve. DETAILED DESCRIPTION

[0023] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 8 The present invention provides a technical solution: a circulating fire-fighting liquid cooling energy storage system, comprising a chiller 1, a liquid cooling pipeline 2, a coolant tank 3 and a liquid cooling Pack body 4, the chiller 1 is used to provide circulating power for the coolant and perform cooling, the liquid cooling pipeline 2 comprises a chiller liquid inlet pipe 211, a coolant tank valve 212, a coolant liquid outlet pipe 221 and two Pack liquid inlet valves 222;

[0025] The liquid cooling Pack body 4 includes a Pack liquid cooling pipe inlet 41 and a Pack fire outlet 42. The Pack liquid cooling pipe inlet 41 and the Pack fire outlet 42 are connected to the liquid outlet pipeline of the chiller 1 through one Pack inlet valve 222. The other Pack inlet valve 222 is connected to the liquid inlet pipeline of the chiller 1 through the coolant outlet pipe 221. The coolant tank 3 is connected to the coolant outlet pipe 221 through the coolant tank valve 212. The coolant tank valve 212 The Pack inlet valve 222 is an electronic three-way valve. The coolant tank 3 is used to replenish the coolant in the liquid cooling circulation system. The top of the liquid cooling Pack body 4 is provided with an explosion-proof pressure relief valve 43. The coolant tank 3 is provided with a heat exchange mechanism inside, and includes a motor 31, an output shaft 32 and a plurality of stirring blades 33. The plurality of stirring blades 33 are evenly fixedly installed on the outside of the output shaft 32, and are fixedly connected to the output end of the motor 31 through the output shaft 32. The motor 31 is fixedly installed on the inner wall of the coolant tank 3.

[0026] When the chiller 1 is operating normally, the liquid inlet of the chiller 1 is always connected to the liquid outlet of the liquid cooling Pack body 4, the coolant tank 3 is always closed, the liquid outlet of the chiller 1 is always connected to the liquid inlet of the liquid cooling Pack body 4, and the Pack fire outlet 42 is always closed. When thermal runaway occurs, the host sends a signal to enter the fire fighting mode, and the coolant tank 3 replenishes the chiller 1. After the chiller 1 circulates, the Pack fire outlet 42 opens and injects the coolant into the liquid cooling Pack body 4 for immersion fire fighting. Through its own liquid cooling circulation system, a lightweight and efficient fire fighting system is realized, which reduces the fire fighting problem after the thermal runaway of the battery cell in the energy storage system and reduces the energy storage system. The loss of fire after thermal runaway greatly improves the safety of energy storage systems. Firefighting after integrating liquid cooling units can be carried out by immersion fire extinguishing in the early stage of thermal runaway to prevent thermal runaway from spreading from the battery cell to the entire package or cluster. At the same time, using liquid cooling units for firefighting can reduce the waste caused by external water sources and pipelines. At this time, firefighting is no longer limited to site and environmental requirements. Using liquid cooling units for firefighting can reduce the waste caused by external water sources, pipelines and other equipment. At this time, firefighting is no longer limited to site and environmental requirements, which can greatly reduce the cost of firefighting construction and can quickly extinguish fires. Firefighting isolation can be carried out in the early stage of thermal runaway to avoid fires in the entire package or cluster, and minimize fire losses.

[0027] The coolant is cooled inside the liquid cooling Pack body 4 and flows into the coolant tank 3 after completing a cycle. During the circulating cooling process, the coolant continuously flows in and out of the coolant tank 3. When the coolant after a cycle enters the coolant tank 3, the motor 31 runs, and drives a plurality of stirring blades 33 to rotate around the center of the output shaft 32 through the output shaft 32 to stir the circulated coolant, thereby greatly improving the heat dissipation effect of the coolant, so as to ensure the effect of subsequent heat exchange and optimize the use effect of the coolant.

[0028] The output shaft 32 is provided with a swinging part on both sides thereof, and the two swinging parts include a slide rail 34, a slider 341, a chamber 35 and a tooth plate 36. The outer side of the output shaft 32 is fixed with a sector tooth 321, and the sector tooth 321 is meshed with the tooth plate 36.

[0029] The slide rail 34 is fixedly mounted on the inner wall of the coolant tank 3, the slider 341 is slidably connected to the inner wall of the slide rail 34, the tooth plate 36 is fixedly mounted on the inner side of the slider 341, the chamber 35 is fixedly mounted on the outer side of the slider 341, a shaking plate 1 37 is fixed on the outer side of the chamber 35, a shaking plate 2 38 is connected to the outer side of the shaking plate 1 37, springs are fixed between the upper and lower sides of the slider 341 and the inner wall of the coolant tank 3, and a through shape is formed between the shaking plate 1 37 and the shaking plate 2 38;

[0030] When the stirring blade 33 rotates to dissipate the heat of the coolant, the output shaft 32 drives the fan teeth 321 to rotate synchronously. The fan teeth 321 first mesh with the tooth plate 36 on the left, and then mesh with the tooth plate 36 on the right, so that the two tooth plates 36 make opposite movements. The tooth plate 36 on the left moves upward, driving the slider 341 to slide upward along the inner wall of the slide rail 34, thereby driving the shaking plate 1 37 and the shaking plate 2 38 on the left to move upward through the chamber 35, and the spring is deformed by force, and the tooth plate 36 on the right moves downward, thereby driving the shaking plate 1 37 and the shaking plate 2 38 on the right to move downward, and the spring is deformed by force. During the movement of the shaking plate, the coolant flows back and forth between the two through the through hole between the shaking plate 1 37 and the shaking plate 2, thereby accelerating the heat dissipation of the coolant and ensuring the cooling efficiency of the subsequent cooling cycle.

[0031] One side of the shaking plate 1 37 and the shaking plate 2 38 are both arc-shaped and are arranged opposite to each other;

[0032] By setting the shaking plate 1 37 and the shaking plate 2 38 to be in an arc shape, on the one hand, the coverage area can be increased, so that the impact intensity of the shaking plate on the coolant is increased when it moves up and down, thereby further improving the cooling rate of the coolant. On the other hand, the coolant flows back and forth in the arc-shaped hole, and its special shape enhances the fluidity of the coolant, thereby relatively further accelerating the cooling rate.

[0033] A sliding hole is provided on the right side of the shaking plate 1 37, and a connecting block 371 is slidably connected in the sliding hole, an elastic spring is fixed between the connecting block 371 and the inner wall of the sliding hole, the connecting block 371 is fixedly connected to the shaking plate 2 38, a squeezing ball 381 is fixed on the outer side of the shaking plate 2 38, and arc blocks 39 are fixed on both sides of the inner wall of the coolant tank 3;

[0034] After the shaking plate 2 38 moves, the squeezing ball 381 and the arc block 39 come into contact with each other;

[0035] When the shaking plate 2 38 and the shaking plate 1 37 move up and down, the arc block 39 presses the squeezing ball 381 through the contact between the squeezing ball 381 and the arc block 39, so that the shaking plate 2 38 is subjected to force, which drives the connecting block 371 to be subjected to force, and the connecting block 371 presses the elastic spring to be deformed under force, and the shaking plate 2 38 moves inward, and the shaking plate 1 37 and the shaking plate 2 38 squeeze the coolant between the two, so that the coolant between the two rolls, which greatly improves the heat dissipation speed of the coolant and greatly improves the cooling effect.

[0036] A through hole is provided in the middle of the shaking plate 1 37, and a sliding rod 372 is slidably connected in the through hole, and the sliding rod 372 runs through the chamber 35;

[0037] The inner wall of the chamber 35 is slidably connected with an air pressure plate 351, which is fixedly mounted on the outer side of a slide bar 372, and the slide bar 372 is fixedly connected to the inner side of the second shaking plate 38;

[0038] An electromagnetic plate 352 is fixed to the inner wall of the chamber 35. The electromagnetic plate 352 generates magnetism when energized. The air pressure plate 351 is made of metal.

[0039] When the shaking plate 38 moves inward, it drives the slide bar 372 to slide in the through hole, thereby driving the air pressure plate 351 to slide along the inner wall of the chamber 35. When the cooling effect needs to be greatly improved, the electromagnetic plate 352 can be operated by electric drive. After the electromagnetic plate 352 is energized, it generates magnetism, thereby applying a magnetic attraction force to the metal air pressure plate 351, and the air pressure plate 351 moves quickly inward, thereby driving the shaking plate 38 to move quickly inward through the slide bar 372, increasing the squeezing strength of the coolant between the shaking plate 1 37 and the shaking plate 2 38, and increasing the rolling strength of the coolant between the two, so that the coolant dissipates heat violently, and the cooling effect of the subsequent high-frequency circulation coolant cooling Pack body 4 is maximized.

[0040] The inner end of the slide rod 372 is spherical, and the plurality of stirring blades 33 are all made of elastic material and have spherical outer ends.

[0041] After the slide bar 372 moves to the limit position, it contacts the stirring blade 33;

[0042] When the electromagnetic plate 352 is running, the slide bar 372 moves inward to the limit position. At this time, when the stirring blade 33 rotates around the center of the output shaft 32, it is squeezed with one end of the slide bar 372. The stirring blade 33 is deformed by force until it presses over the slide bar 372. Then, the stirring blade 33 elastically resets itself. In this process, the stirring blade 33 jumps, thereby greatly shaking the coolant. For high-frequency circulation cooling work, the temperature of the coolant can be kept at a low temperature at all times, and the heat dissipation intensity is greatly enhanced.

[0043] When low-frequency circulation cooling is performed, the electromagnetic plate 352 is closed, and the elastic spring generates a reaction force to reset the slide bar 372, thereby relatively reducing the elastic loss of the stirring blade 33, increasing its service life, and avoiding long-term high-intensity deformation that causes a rapid reduction in elasticity;

[0044] The heat dissipation of the coolant by the above mechanical structure is equivalent to the heat exchange of a traditional cooler, and its operating cost is reduced, the power of the cooler can be relatively reduced, the energy consumption is less, and the cooling effect is far better than that of the cooler alone.

[0045] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0046] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circulating fire-fighting liquid cooling energy storage system, comprising a chiller (1), a liquid cooling pipeline (2), a cooling liquid tank (3) and a liquid cooling Pack body (4), characterized in that: The water chiller (1) is used to provide circulating power for the cooling liquid and to perform cooling. The liquid cooling pipeline (2) comprises a water chiller liquid inlet pipe (211), a cooling liquid tank valve (212), a cooling liquid outlet pipe (221) and two Pack liquid inlet valves (222); The liquid cooling Pack body (4) comprises a Pack liquid cooling pipe liquid inlet (41) and a Pack fire outlet (42); the Pack liquid cooling pipe liquid inlet (41) and the Pack fire outlet (42) are connected to the liquid outlet pipeline of the chiller (1) via one of the Pack liquid inlet valves (222); the other Pack liquid inlet valve (222) is connected to the liquid inlet pipeline of the chiller (1) via a coolant outlet pipe (221); the coolant tank (3) is connected to the coolant outlet pipe (221) via a coolant tank valve (212); the coolant tank valve (212) and the Pack liquid inlet valve (222) are both electronic three-way valves; the coolant tank (3) is used to replenish the coolant in the liquid cooling circulation system; the liquid cooling Pa An explosion-proof pressure relief valve (43) is arranged on the top of the ck body (4); a heat exchange mechanism is arranged inside the coolant tank (3), and the coolant tank (3) comprises a motor (31), an output shaft (32) and a plurality of stirring blades (33); the plurality of stirring blades (33) are evenly fixedly mounted on the outside of the output shaft (32) and are fixedly connected to the output end of the motor (31) through the output shaft (32); the motor (31) is fixedly mounted on the inner wall of the coolant tank (3); a shaking part is arranged on the left and right sides of the output shaft (32); the two shaking parts each comprise a slide rail (34), a slider (341), a chamber (35) and a tooth plate (36); a fan tooth (321) is fixedly mounted on the outside of the output shaft (32); the fan tooth (321) and the tooth plate (36) are meshed with each other; The slide rail (34) is fixedly mounted on the inner wall of the coolant tank (3), the slider (341) is slidably connected to the inner wall of the slide rail (34), the tooth plate (36) is fixedly mounted on the inner side of the slider (341), the chamber (35) is fixedly mounted on the outer side of the slider (341), a shaking plate 1 (37) is fixedly mounted on the outer side of the chamber (35), a shaking plate 2 (38) is connected to the outer side of the shaking plate 1 (37), springs are fixedly mounted between the upper and lower sides of the slider (341) and the inner wall of the coolant tank (3), and the shaking plate 1 (37) is connected to the inner wall of the coolant tank (3). A through-shape is formed between the two shaking plates (38); one side of the shaking plate (37) and the second shaking plate (38) are both arc-shaped and arranged opposite to each other; a sliding hole is opened on the right side of the shaking plate (37); a connecting block (371) is slidably connected in the sliding hole; an elastic spring is fixed between the connecting block (371) and the inner wall of the sliding hole; the connecting block (371) is fixedly connected to the second shaking plate (38); a squeezing ball (381) is fixed on the outer side of the second shaking plate (38); and arc blocks (39) are fixed on both sides of the inner wall of the coolant tank (3); After the shaking plate (38) moves, the squeezing ball (381) and the arc block (39) contact each other. A through hole is provided in the middle of the shaking plate (37), and a sliding rod (372) is slidably connected in the through hole. The sliding rod (372) runs through the chamber (35). The inner wall of the chamber (35) is slidably connected to a gas pressure plate (351), the gas pressure plate (351) is fixedly mounted on the outer side of a slide bar (372), and the slide bar (372) is fixedly connected to the inner side of the second shaking plate (38); An electromagnetic plate (352) is fixed to the inner wall of the chamber (35), and the electromagnetic plate (352) generates magnetism when energized, and the air pressure plate (351) is made of metal.

2. A circulating fire-fighting liquid cooling energy storage system according to claim 1, characterized in that: The inner end of the sliding rod (372) is spherical, and the plurality of stirring blades (33) are all made of elastic material and have outer ends that are spherical.

3. A circulating fire-fighting liquid cooling energy storage system according to claim 2, characterized in that: The sliding rod (372) contacts the stirring blade (33) after moving to the limit position.

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