Temperature and heat dissipation integrated immersed energy storage system

Abstract

The invention discloses a temperature and heat dissipation integrated immersed energy storage system which is characterized in that a uniform temperature pipeline system is arranged in an energy storage compartment, so that uniform temperature circulation of a temperature control medium can be realized; an immersion mode is adopted to ensure that the temperature of the energy storage monomers under a normal working condition is kept within a set temperature range, and the difference value between the temperature of different energy storage monomers belonging to the same energy storage pack and the temperature of the energy storage monomers belonging to different energy storage packs is smaller; the temperature control unit is arranged to control the temperature of the temperature control medium, so that the temperature difference of the temperature control medium in the compartment-level liquid storage tanks of the different energy storage compartments is reduced, and the temperature equalization performance between the different energy storage compartments is further improved; by arranging the fire-fighting unit, when thermal runaway happens to some energy storage single bodies, the fire-fighting unit can rapidly inject or spray fire-fighting media into the corresponding energy storage bags through the fire-fighting liquid inlet header pipe, the fire-fighting liquid inlet branch pipes and the fire-fighting liquid inlet branch pipes, fire-fighting immersion can be achieved, and the influence range of thermal runaway is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric energy storage, and specifically relates to a temperature-dissipation integrated immersion energy storage system. Background Art

[0002] Lithium battery thermal runaway is caused by the fact that the heat generation rate of the battery is much higher than the heat dissipation rate, and a large amount of heat accumulates and is not dissipated in time. Lithium battery thermal runaway is an energy positive feedback cycle process: the rising temperature causes the system to heat up, and when the system heats up, the temperature rises, which in turn makes the system hotter. There are many reasons for lithium battery thermal runaway, mainly the following points.

[0003] 1) Overcharge triggers thermal runaway of lithium batteries: The battery itself has overcharge protection, but when this overcharge protection fails, the battery continues to charge, which will cause the battery to overcharge and trigger thermal runaway. With the continuous use of the battery, the aging phenomenon of the battery becomes more and more serious, and the consistency of the battery pack becomes worse and worse. At this time, if the battery is overcharged, it is very easy to have thermal safety problems. Therefore, you should always charge safely according to the instructions.

[0004] 2) Overheating triggers thermal runaway of lithium batteries: During normal use of lithium batteries, when the battery maintains high-speed discharge or encounters extreme operating conditions, it must continue to discharge at a large current. At this time, the temperature inside the battery begins to rise slowly. When a large amount of heat accumulates in the battery, if the discharge current is not limited in time, it is very likely to cause thermal runaway of the lithium battery.

[0005] 3) Mechanically triggered thermal runaway of lithium batteries: Deformation of the lithium battery pack due to impact, internal short circuit of the battery pack, and other behaviors that damage the battery pack may cause thermal runaway of the battery.

[0006] In addition to the above reasons, battery over-discharge and internal short circuit can also cause battery thermal runaway. In particular, during the battery thermal runaway explosion stage, the oxygen produced by the electrolyte and the positive electrode reacts violently, causing the battery to catch fire, leading to fire and explosion hazards, posing a huge threat to people's lives and property safety. Summary of the invention

[0007] In view of this, the purpose of the present invention is to provide a temperature-dissipation integrated immersion energy storage system, which can achieve uniform temperature control under normal operating conditions to keep the temperature within a set temperature range; when thermal runaway occurs, fire-fighting immersion can be achieved to reduce the impact range of thermal runaway.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A temperature-extinguishing integrated submerged energy storage system, comprising a temperature control unit, a fire-fighting unit and at least one energy storage compartment, wherein at least one energy storage cluster is arranged in the energy storage compartment, and at least one energy storage pack is installed in the energy storage cluster;

[0010] The energy storage compartment is provided with an average temperature piping system, and the average temperature piping system includes a compartment-level liquid storage tank, an average temperature liquid inlet main pipe and an average temperature liquid return main pipe; the average temperature liquid inlet main pipe is connected to the compartment-level liquid storage tank; the average temperature liquid inlet main pipe is provided with an average temperature liquid inlet branch pipe; the average temperature liquid inlet branch pipe is provided in a one-to-one correspondence with the energy storage clusters arranged in the same energy storage compartment; the average temperature liquid inlet branch pipe is provided with an average temperature liquid inlet branch pipe, and the average temperature liquid inlet branch pipe is provided in a one-to-one correspondence with the energy storage packs arranged in the same energy storage cluster. The temperature-averaging liquid inlet branch pipe is connected to the corresponding energy storage pack; the temperature-averaging liquid return main pipe is provided with a temperature-averaging liquid return branch pipe, and the temperature-averaging liquid return branch pipe is arranged one-to-one with the energy storage clusters arranged in the same energy storage compartment; the temperature-averaging liquid return branch pipe is provided with a temperature-averaging liquid return branch pipe, and the temperature-averaging liquid return branch pipe is arranged one-to-one with the energy storage packs arranged in the same energy storage cluster, and the temperature-averaging liquid return branch pipe is connected to the corresponding energy storage pack; the temperature-averaging liquid inlet main pipe is provided with a temperature-averaging liquid inlet pump;

[0011] The temperature control unit is provided with a temperature control liquid outlet main pipe and a temperature control liquid return main pipe, the temperature control liquid outlet main pipe is provided with a temperature control liquid outlet branch pipe, the temperature control liquid outlet branch pipe is arranged in a one-to-one correspondence with the energy storage compartment, and the temperature control liquid outlet branch pipe is connected to the compartment-level liquid storage tank arranged in the corresponding energy storage compartment; the temperature-averaging liquid return main pipe is provided with a first liquid return branch and a second liquid return branch, the first liquid return branch is connected to the corresponding compartment-level liquid storage tank, and the second liquid return branch is connected to the temperature control liquid return main pipe;

[0012] The fire-fighting unit is provided with a fire-fighting liquid inlet main pipe, and the fire-fighting liquid inlet main pipe is provided with a fire-fighting liquid inlet branch pipe, and the fire-fighting liquid inlet branch pipe is arranged in a one-to-one correspondence with the energy storage cluster, and the fire-fighting liquid inlet branch pipe is provided with a fire-fighting liquid inlet branch pipe, and the fire-fighting liquid inlet branch pipe is arranged in a one-to-one correspondence with the energy storage packs arranged in the same energy storage cluster; the energy storage pack includes a pack shell, and at least one energy storage cell is installed in the pack shell, and the fire-fighting liquid inlet branch pipe is used to inject fire-fighting medium into the energy storage pack or spray the energy storage pack when the energy storage cell in the corresponding energy storage pack has thermal runaway.

[0013] Furthermore, the temperature-averaging liquid inlet branch pipe is connected to the bottom of the energy storage pack; each of the temperature-averaging liquid inlet branch pipes is provided with a temperature-averaging liquid inlet solenoid valve for controlling the liquid inlet flow rate.

[0014] Furthermore, the temperature-averaging liquid return branch pipe is connected to the top of the energy storage pack to control the height of the immersion liquid level in the energy storage pack; each of the temperature-averaging liquid return branch pipes is provided with a temperature-averaging liquid return solenoid valve for controlling the return liquid flow rate.

[0015] Furthermore, the first liquid return branch and the second liquid return branch are respectively provided with liquid return control valves for controlling the temperature control medium to return to the corresponding compartment-level liquid storage tank or the temperature control unit.

[0016] Furthermore, the package shell adopts a closed structure; a package-level explosion-proof valve is provided on the top of the package shell, and the liquid outlet of the fire-fighting liquid inlet branch pipe is arranged directly above the package-level explosion-proof valve; or, the fire-fighting liquid inlet branch pipe is connected to the interior of the package shell.

[0017] Furthermore, the energy storage compartment is provided with a compartment shell capable of storing fire-fighting medium, or the energy storage cluster is provided with a cluster shell capable of storing fire-fighting medium.

[0018] Furthermore, an overflow liquid return pipe is provided on the top of the compartment shell or cluster shell.

[0019] Furthermore, it also includes a liquid return tank, and the overflow liquid return pipe is connected to the liquid return tank.

[0020] Furthermore, the fire-fighting liquid inlet branch pipe is connected to the interior of the package shell, a liquid return groove is provided at the bottom of the energy storage compartment or the bottom of the energy storage cluster, and a bottom liquid return pipe is provided at the bottom of the liquid return groove.

[0021] Furthermore, it also includes a liquid return tank, and the bottom liquid return pipe is connected to the liquid return tank.

[0022] Furthermore, the outer shell of the package adopts an open structure with a top opening; the fire-fighting liquid inlet branch pipe is located above the top opening of the outer shell of the package, and the fire-fighting liquid inlet branch pipe is provided with a fire-fighting liquid outlet for injecting fire-fighting medium into the outer shell of the package.

[0023] Furthermore, at least one energy storage unit is installed in the outer shell of the package, and the fire-fighting liquid outlet is arranged in a one-to-one correspondence with the energy storage unit in the corresponding energy storage package.

[0024] Furthermore, a monomer explosion-proof valve is provided on the top surface of the energy storage monomer, and the fire-fighting liquid outlet is arranged directly above the corresponding monomer explosion-proof valve.

[0025] Furthermore, the fire-fighting liquid outlet is provided with a fire-fighting sealing membrane which is opened when the single explosion-proof valve explodes.

[0026] Further, the energy storage compartment is provided with a sealed compartment shell, or the energy storage cluster is provided with a sealed cluster shell.

[0027] Furthermore, an overflow liquid return pipe is provided on the top of the compartment shell or cluster shell.

[0028] Furthermore, it also includes a liquid return tank, and the overflow liquid return pipe is connected to the liquid return tank.

[0029] Furthermore, there is one compartment-level liquid storage tank, and the compartment-level liquid storage tank is arranged at the bottom or top of the corresponding energy storage compartment; when the compartment-level liquid storage tank is arranged at the top of the corresponding energy storage compartment, the temperature-averaging liquid return main pipe is provided with a liquid return pump.

[0030] Furthermore, the compartment-level liquid storage tanks are provided in two, and the two compartment-level liquid storage tanks are respectively a bottom liquid storage tank and a top liquid storage tank, and the bottom liquid storage tank and the top liquid storage tank are respectively located at the top and the bottom of the corresponding energy storage compartment;

[0031] The temperature-averaging liquid inlet main pipe is connected to the top liquid storage tank, and the temperature-averaging liquid return main pipe is connected to the bottom liquid storage tank; a lifting pipe is provided between the bottom liquid storage tank and the top liquid storage tank, and a lifting pump is provided on the lifting pipe for pumping the temperature control medium in the bottom liquid storage tank into the top liquid storage tank; or,

[0032] The temperature-averaging liquid inlet main pipe is connected to the bottom liquid storage tank, the temperature-averaging liquid return main pipe is connected to the top liquid storage tank, and a liquid return pump is provided on the temperature-averaging liquid return main pipe; a connecting pipe is provided between the bottom liquid storage tank and the top liquid storage tank.

[0033] Furthermore, an exhaust hole and an exhaust fan are provided on the top of the energy storage compartment.

[0034] Further, when the temperature-averaging liquid return main pipe is connected to the compartment-level liquid storage tank located at the bottom of the energy storage compartment, the tops of all the temperature-controlled liquid return branch pipes arranged on the temperature-averaging liquid return main pipe are provided with exhaust branch pipes extending to the top of the energy storage compartment, or, the compartment-level liquid storage tank located at the bottom of the energy storage compartment is provided with an exhaust pipe extending to the top of the energy storage compartment; when the temperature-averaging liquid return main pipe is connected to the compartment-level liquid storage tank located at the top of the energy storage compartment, the compartment-level liquid storage tank located at the top of the energy storage compartment is provided with an exhaust port.

[0035] Furthermore, the energy storage cluster includes a cluster bracket, and the package shell is fixedly mounted on the cluster bracket; or, a placement platform for placing the energy storage package is provided on the cluster bracket.

[0036] Furthermore, it also includes a liquid return tank, on which a fire-fighting liquid return main pipe is provided;

[0037] The fire-fighting liquid return main pipe is connected to the temperature-averaging liquid return main pipe; or,

[0038] The temperature-averaging liquid return branch pipe is provided with a fire-fighting liquid return branch, and the fire-fighting liquid return branch is connected to the fire-fighting liquid return main pipe; or,

[0039] The fire-fighting liquid return main pipe is connected to a fire-fighting liquid return branch pipe, and the fire-fighting liquid return branch pipe is arranged in a one-to-one correspondence with the energy storage clusters arranged in the same energy storage compartment; the fire-fighting liquid return branch pipe is connected to a fire-fighting liquid return branch pipe, and the fire-fighting liquid return branch pipe is arranged in a one-to-one correspondence with the energy storage packs arranged in the same energy storage cluster; the fire-fighting liquid return branch pipe is connected to the corresponding energy storage pack.

[0040] The beneficial effects of the present invention are:

[0041] The temperature-dissipation integrated immersion energy storage system of the present invention arranges an equalizing pipe system in the energy storage compartment, utilizes the equalizing liquid inlet main pipe to transport the temperature control medium to the equalizing liquid inlet branch pipe of each energy storage cluster, and then injects the temperature control medium into each energy storage pack through the equalizing liquid inlet branch pipe; the liquid level of the temperature control medium in the outer shell of the energy storage pack is controlled by the equalizing liquid return branch pipe and the temperature control medium immerses the energy storage monomer, after the liquid level of the temperature control medium in the energy storage pack reaches the set height, the temperature control medium flows back to the compartment-level liquid storage tank in sequence through the equalizing liquid return branch pipe, the equalizing liquid return branch pipe and the equalizing liquid return main pipe, so as to realize the circulation of the temperature control medium; the immersion method is adopted to ensure that the temperature of the energy storage monomer under normal working conditions is maintained within the set temperature range, and the temperature difference between different energy storage monomers belonging to the same energy storage pack and the temperature difference between energy storage monomers belonging to different energy storage packs are smaller; by setting The temperature control unit can control the temperature of the temperature control medium, and use the temperature control liquid outlet main pipe to transmit the temperature control medium after temperature control by the temperature control unit to the compartment-level liquid storage tank of each energy storage compartment, so that the temperature of the temperature control medium in the compartment-level liquid storage tank is maintained within the set range. At the same time, the temperature difference of the temperature control medium in the compartment-level liquid storage tanks of different energy storage compartments can be reduced, and the temperature uniformity performance between different energy storage compartments can be further improved; the return liquid of the temperature control unit can be returned through the compartment-level liquid storage tank, or directly through the temperature uniformity return liquid main pipe, so as to realize the temperature control circulation control of the temperature control medium in each energy storage compartment; by setting up a fire-fighting unit, when a thermal runaway occurs in an energy storage unit, the fire-fighting unit can quickly inject the fire-fighting medium into the corresponding energy storage package through the fire-fighting liquid inlet main pipe, the fire-fighting liquid inlet branch pipe and the fire-fighting liquid inlet branch pipe, so as to realize fire-fighting immersion to reduce the impact range of thermal runaway.

[0042] The present invention also has the following advantages:

[0043] 1) Both the temperature control medium and the fire fighting medium are made of insulating, non-flammable safety liquid. The thermal management system consists of a dual cycle of temperature control and temperature equalization coupling, so that the energy storage unit is completely immersed in the safety liquid medium, the temperature is adjusted, and the temperature rise and temperature consistency of the energy storage unit and the energy storage package are effectively managed. When the energy storage charge and discharge rate is less than 1C, the temperature difference of the energy storage unit is less than 2°C, which effectively ensures the safe and reliable operation of the energy storage system and extends the battery life by more than 10%;

[0044] 2) The battery is immersed in the safety liquid during the entire operation process. The combustible substances ejected when the battery is thermally runaway are first filtered by the safety liquid and then discharged from the energy storage system through independent exhaust holes and exhaust fans. At the same time, the firefighting medium is injected into the corresponding energy storage package to prevent air from entering;

[0045] 3) When a certain energy storage unit in a certain energy storage package experiences thermal runaway, the fluid insulation safety fluid between the energy storage units prevents the heat from spreading, making it absolutely non-combustible when a unit in the energy storage system experiences thermal runaway, thus fundamentally solving the potential explosion hazard caused by thermal runaway.

[0046] 4) The BMS acquisition board and the balancing board are immersed in the safety liquid, which can eliminate the heat dissipation cost of the circuit board, prevent the heat spread and fire hazards, and have a simple appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0048] Figure 1 It is a structural schematic diagram of an embodiment of a temperature and fire protection integrated immersion energy storage system of the present invention;

[0049] Figure 2 This is a schematic diagram of the structure when the compartment-level liquid storage tank is set on the top of the energy storage compartment;

[0050] Figure 3 for Figure 2 A magnified image of area A;

[0051] Figure 4 This is a schematic diagram of the structure when the compartment-level liquid storage tank is arranged at the bottom of the energy storage compartment;

[0052] Figure 5 It is a schematic diagram of the structure when there are two compartment-level liquid storage tanks;

[0053] Figure 6 for Figure 5 A magnified view of area B;

[0054] Figure 7 This is a structural diagram of the connection between the fire-fighting liquid return main pipe and the temperature-averaging liquid return branch pipe;

[0055] Figure 8 It is a schematic diagram of the structure when the package shell adopts an open structure;

[0056] Fig. 9 for Figure 8 A magnified view of region C;

[0057] Fig.10 This is a schematic diagram of the structure when fire-fighting liquid return branch pipes and fire-fighting liquid return branch pipes are installed.

[0058] Description of reference numerals:

[0059] 100-temperature control unit; 101-temperature control liquid outlet main pipe; 102-temperature control liquid return main pipe; 103-second liquid return branch; 104-liquid return control valve;

[0060] 200-fire fighting unit; 201-fire fighting liquid inlet main pipe; 202-fire fighting liquid inlet branch pipe; 203-fire fighting liquid inlet branch pipe; 204-return liquid tank; 205-fire fighting liquid return main pipe; 206-fire fighting liquid return valve; 207-fire fighting liquid return branch; 208-fire fighting liquid return valve; 209-fire fighting liquid return branch pipe; 210-fire fighting liquid return branch pipe;

[0061] 300-energy storage compartment; 301-energy storage cluster; 302-energy storage package; 303-package shell; 304-package-level explosion-proof valve; 305-cluster shell; 306-overflow return pipe; 307-fire outlet;

[0062] 310-compartment level liquid storage tank; 310a-bottom liquid storage tank; 310b-top liquid storage tank; 311-average temperature liquid inlet main pipe; 312-average temperature liquid inlet branch pipe; 313-average temperature liquid inlet branch pipe; 314-average temperature liquid inlet solenoid valve; 315-average temperature liquid return main pipe; 316-average temperature liquid return branch pipe; 317-average temperature liquid return branch pipe; 318-average temperature liquid return solenoid valve; 319-first liquid return branch; 320-liquid return control valve; 321-average temperature liquid return valve; 322-liquid return tank; 323-bottom liquid return pipe; 324-liquid return pump; 325-lift pipe; 326-lift pump; 328-exhaust hole; 329-exhaust fan; 330-exhaust branch pipe. DETAILED DESCRIPTION

[0063] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0064] like Figure 1 As shown, the temperature-extinguishing integrated immersion energy storage system of this embodiment includes a temperature control unit 100, a fire fighting unit 200 and at least one energy storage compartment 300, and at least one energy storage cluster 301 is provided in the energy storage compartment 300, and at least one energy storage package 302 is installed in the energy storage cluster 301. Specifically, in this embodiment, four energy storage clusters 301 are provided in each energy storage compartment 300, and seven energy storage packages 302 are installed in each energy storage cluster 301. The energy storage compartments 300 of this embodiment are shown as two. Of course, the number of energy storage compartments 300 can be set to 1, 3 or more than 3 according to actual needs, and no further details are given.

[0065] like Figure 2-8As shown, the energy storage compartment 300 of this embodiment is provided with an equalizing temperature pipeline system, and the equalizing temperature pipeline system includes a compartment-level liquid storage tank 310, an equalizing temperature liquid inlet main pipe 311 and an equalizing temperature liquid return main pipe 315. The equalizing temperature liquid inlet main pipe 311 is connected to the compartment-level liquid storage tank 310. The equalizing temperature liquid inlet main pipe 311 is provided with an equalizing temperature liquid inlet branch pipe 312, and the equalizing temperature liquid inlet branch pipe 312 is arranged in a one-to-one correspondence with the energy storage cluster 301 arranged in the same energy storage compartment 300, that is, in this embodiment, each energy storage compartment 300 is provided with 4 equalizing temperature liquid inlet branch pipes 312. The equalizing temperature liquid inlet branch pipe 312 is provided with an equalizing temperature liquid inlet branch pipe 313, and the equalizing temperature liquid inlet branch pipe 313 is arranged in a one-to-one correspondence with the energy storage pack 302 arranged in the same energy storage cluster 301, and the equalizing temperature liquid inlet branch pipe 313 is connected to the corresponding energy storage pack 302. That is, in this embodiment, each temperature-averaging liquid inlet branch pipe 312 is provided with 7 temperature-averaging liquid inlet branches 313. In the preferred implementation of this embodiment, the temperature-averaging liquid inlet branch pipe 313 is connected to the bottom of the energy storage pack 302, and each temperature-averaging liquid inlet branch pipe 313 is provided with a temperature-averaging liquid inlet solenoid valve 314 for controlling the liquid inlet flow rate of the temperature control medium. Due to the different resistance to the flow of the temperature control medium in each energy storage pack 302 and the different heights of different energy storage packs 302, the temperature-averaging liquid inlet solenoid valve 314 can make the difference in the flow rate of the temperature control medium in different energy storage packs 302 within the set error range, so as to better achieve the effect of temperature-averaging control.

[0066] The temperature return main pipe 315 of this embodiment is provided with a temperature return branch pipe 316, and the temperature return branch pipe 316 is arranged in a one-to-one correspondence with the energy storage cluster 301 arranged in the same energy storage compartment 300, that is, each energy storage compartment 300 is provided with 4 temperature return branch pipes 316. The temperature return branch pipe 316 of this embodiment is provided with a temperature return branch pipe 317, and the temperature return branch pipe 317 is arranged in a one-to-one correspondence with the energy storage pack 302 arranged in the same energy storage cluster 301, and the temperature return branch pipe 317 is connected with the corresponding energy storage pack 302, that is, in this embodiment, each temperature return branch pipe 316 is provided with 7 temperature return branches 317. In the preferred implementation of this embodiment, each temperature return branch pipe 317 is respectively provided with a temperature return solenoid valve 318 for controlling the return flow rate of the porous medium, so that the liquid level in the energy storage pack 302 is kept within a set range, so as to achieve the technical purpose of immersing the energy storage pack 302. In this embodiment, the temperature return branch pipe 317 is connected to the top of the energy storage pack 302 to control the liquid level of the temperature control medium in the energy storage pack 302 to immerse the energy storage unit. In this embodiment, a temperature inlet pump 318 is provided on the temperature inlet main pipe 311 to provide the pressure required for the temperature control medium inlet 3.

[0067] The temperature control unit 100 is provided with a temperature control liquid outlet main pipe 101 and a temperature control liquid return main pipe 102. The temperature control liquid outlet main pipe 101 is provided with a temperature control liquid outlet branch pipe. The temperature control liquid outlet branch pipe is arranged one-to-one with the energy storage compartment 300, and the temperature control liquid outlet branch pipe is connected to the compartment-level liquid storage tank 310 arranged in the corresponding energy storage compartment 300. The temperature-averaging liquid return main pipe 315 is provided with a first liquid return branch 319 and a second liquid return branch 103. The first liquid return branch 319 is connected to the corresponding compartment-level liquid storage tank 310, and the second liquid return branch 103 is connected to the temperature control liquid return main pipe 102. In this embodiment, a liquid return control valve 320 is provided on the first liquid return branch 319, and a liquid return control valve 104 is provided on the second liquid return branch 103. The liquid return control valve 320 and the liquid return control valve 104 are used to control the temperature control medium to reflux to the corresponding compartment-level liquid storage tank 310 or the temperature control unit 100. Specifically, when the temperature of the temperature-controlled medium in the compartment-level liquid storage tank 310 and the temperature-averaging liquid return main pipe 315 is within the set temperature range, the liquid return control valve 320 is opened, the liquid return control valve 104 is closed, and the temperature-controlled medium directly flows back to the corresponding compartment-level liquid storage tank 310 through the first liquid return branch 319. When the temperature of the temperature-controlled medium in the compartment-level liquid storage tank 310 or the temperature-averaging liquid return main pipe 315 is outside the set temperature range, the liquid return control valve 320 is closed, the liquid return control valve 104 is opened, and the temperature-controlled medium flows back to the temperature control unit 100 through the second liquid return branch 103. The temperature-controlled medium adjusted by the temperature control unit 100 then enters the corresponding compartment-level liquid storage tank 310, so that the temperature of the temperature-controlled medium in the compartment-level liquid storage tank 310 is maintained within the set range.

[0068] The fire-fighting unit 200 is provided with a fire-fighting liquid inlet main pipe 201, and a fire-fighting liquid inlet branch pipe 202 is provided on the fire-fighting liquid inlet main pipe 201. The fire-fighting liquid inlet branch pipes 202 are arranged one-to-one with the energy storage cluster 301, that is, in this embodiment, 4 fire-fighting liquid inlet branch pipes 202 are arranged in each energy storage compartment 300. The fire-fighting liquid inlet branch pipes 203 are provided on the fire-fighting liquid inlet branch pipes 202 of this embodiment, and the fire-fighting liquid inlet branch pipes 203 are arranged one-to-one with the energy storage packs 302 arranged in the same energy storage cluster 301, that is, in this embodiment, 7 fire-fighting liquid inlet branch pipes 203 are provided on each fire-fighting liquid inlet branch pipe 202. The energy storage pack 302 includes a pack shell 303, and at least one energy storage cell is installed in the pack shell 303. The fire-fighting liquid inlet branch pipes 203 are used to inject fire-fighting medium into the energy storage pack or spray the energy storage pack 302 when the energy storage cell in the corresponding energy storage pack 302 has thermal runaway. In a preferred implementation manner of this embodiment, the temperature-dissipation integrated submerged energy storage system of this embodiment further includes a liquid return tank 204 , on which a fire-fighting liquid return main pipe 205 is provided.

[0069] There are many ways to return firefighting media, as follows.

[0070] like Figure 2, 4, 5, and 8, in one implementation of the present embodiment, the fire-fighting liquid return main pipe 205 is connected to the temperature-averaging liquid return main pipe 315. Specifically, a fire-fighting liquid return valve 206 is provided on the fire-fighting liquid return main pipe 205. Under normal working conditions, the fire-fighting liquid return valve 206 is closed; when a storage unit has thermal runaway, the fire-fighting medium is injected into the corresponding energy storage compartment 300 or energy storage cluster 301 through the fire-fighting liquid inlet main pipe 201, and the liquid return control valve 320 and the liquid return control valve 104 are closed at the same time, and the fire-fighting liquid return valve 206 is opened, so that the liquid flows into the liquid return tank 204, so as to prevent the fire-fighting medium from contaminating the compartment-level liquid storage tank 310 and the temperature control medium in the temperature control unit 100.

[0071] like Figure 7 As shown, in another implementation of this embodiment, a fire-fighting liquid return branch 207 is provided on the temperature-averaging liquid return branch pipe 316, and the fire-fighting liquid return branch 207 is connected to the fire-fighting liquid return main pipe 205. The fire-fighting liquid return branch 207 and the temperature-averaging liquid return branch pipe 316 are respectively provided with a temperature-averaging liquid return valve 321 and a fire-fighting liquid return valve 208 for controlling the liquid flow into the temperature-averaging liquid return main pipe 315 or the fire-fighting liquid return main pipe 205. Under normal operating conditions, the temperature-averaging liquid return valve 321 is opened and the fire-fighting liquid return valve 208 is closed; when a storage unit experiences thermal runaway, fire-fighting medium is injected into the corresponding energy storage compartment 300 or energy storage cluster 301 through the fire-fighting liquid inlet main pipe 201, and at the same time, the temperature-averaging liquid return valve 321 corresponding to the energy storage compartment 300 or energy storage cluster 301 is closed, and the fire-fighting liquid return valve 208 is opened, so that the liquid flow in the corresponding energy storage compartment 300 or energy storage cluster 301 is returned to the liquid return tank 204 through the fire-fighting liquid return main pipe 205, which not only prevents the fire-fighting medium from contaminating the compartment-level liquid storage tank 310 and the temperature control medium in the temperature control unit 100, but also does not affect the normal operation of other energy storage compartments 300 or energy storage clusters 301.

[0072] like Fig.10As shown, in another implementation of this embodiment, the fire return liquid main pipe 205 is connected to a fire return liquid branch pipe 209, and the fire return liquid branch pipe 209 is arranged in a one-to-one correspondence with the energy storage cluster 301 arranged in the same energy storage compartment 300, that is, in this embodiment, each energy storage compartment 300 is provided with 4 fire return liquid branch pipes 209. The fire return liquid branch pipe 209 is connected to a fire return liquid branch pipe 210, and the fire return liquid branch pipe 210 is arranged in a one-to-one correspondence with the energy storage pack 302 arranged in the same energy storage cluster 301, that is, in this embodiment, each fire return liquid branch pipe 210 is connected to 7 fire return liquid branch pipes 210. The fire return liquid branch pipe 210 is connected to the corresponding energy storage pack 302, and the fire return liquid main pipe 205 is connected to the return liquid tank 204. That is, in this embodiment, an independent fire return liquid pipeline system is provided. In this way, when a storage unit experiences thermal runaway, the temperature equalizing liquid return branch pipe 317 connected to the corresponding energy storage package 302 can be closed to allow the liquid to flow back to the liquid return tank 204 through the fire liquid return branch pipe 210, the fire liquid return branch pipe 209 and the fire liquid return main pipe 205.

[0073] The package shell has two structures: closed structure and open structure, as follows.

[0074] like Figure 2-7As shown, in one implementation of this embodiment, the package shell 303 adopts a closed structure. A package-level explosion-proof valve 304 is provided on the top of the package shell 303, and the liquid outlet of the fire-fighting liquid inlet branch pipe 203 is arranged directly above the package-level explosion-proof valve 304; or, the fire-fighting liquid inlet branch pipe 203 is connected to the inside of the package shell 303. Specifically, at this time, a compartment shell that can store fire-fighting media can be provided in the energy storage compartment 300, or a cluster shell 305 that can store fire-fighting media can be provided in the energy storage cluster 301; at the same time, an overflow return liquid pipe 306 is provided on the top of the compartment shell or cluster shell 305. In this embodiment, the overflow return liquid pipe 306 is connected to the return liquid tank 204. In this embodiment, each energy storage cluster 301 is provided with a cluster shell 305 that can store fire-fighting media. When a thermal runaway occurs in an energy storage monomer, the energy storage cluster 301 can be immersed in fire-fighting, which can reduce the amount of fire-fighting media, and will not affect the normal operation of other energy storage clusters 301. In some other implementations of this embodiment, when the fire-fighting liquid inlet branch pipe 203 is connected to the inside of the package shell 303, a liquid return groove 322 is provided at the bottom of the energy storage compartment 300 or the bottom of the energy storage cluster 301, and a bottom liquid return pipe 323 is provided at the bottom of the liquid return groove 322, and the bottom liquid return pipe 323 is connected to the liquid return tank 204. In this way, when the energy storage unit has thermal runaway, the fire-fighting medium can be injected into the corresponding energy storage package 302 through the fire-fighting liquid inlet branch pipe 203, and the average temperature liquid return solenoid valve 318 on the average temperature liquid return branch pipe 317 connected to the energy storage package 302 is closed at the same time to prevent the fire-fighting medium from entering the average temperature liquid return branch pipe 316; in this way, the fire-fighting medium overflowing from the energy storage package 302 flows back to the liquid return tank 204 through the liquid return groove 322 and the bottom liquid return pipe 323, and will not interfere with the normal operation of other energy storage packages 302 in the same energy storage cluster 301.

[0075] like Figure 8-9As shown, in one of the implementations of this embodiment, the package shell 303 adopts an open structure with a top opening. The fire-fighting liquid inlet branch pipe 203 is located above the top opening of the package shell 303, and the fire-fighting liquid inlet branch pipe 203 is provided with a fire-fighting liquid outlet 307 for injecting fire-fighting medium into the package shell 303. In a preferred implementation of this embodiment, at least one energy storage monomer is installed in the package shell 303, and the fire-fighting liquid outlet is arranged in a one-to-one correspondence with the energy storage monomer arranged in the corresponding energy storage package 302. Preferably, a monomer explosion-proof valve is provided on the top surface of the energy storage monomer, and the fire-fighting liquid outlet 307 is arranged directly above the corresponding monomer explosion-proof valve. At this time, a fire-fighting sealing membrane that is opened when the monomer explosion-proof valve explodes can be provided on the fire-fighting liquid outlet 307. When the energy storage monomer has thermal runaway and the monomer explosion-proof valve is opened, the fire-fighting liquid outlet 307 can be automatically opened. In this embodiment, it is necessary to set a sealed compartment shell on the energy storage compartment 300, or to set a sealed cluster shell 305 on the energy storage cluster, and an overflow return liquid pipe 306 is provided on the top of the compartment shell or cluster shell 305. In this embodiment, a sealed cluster shell 305 is set on the energy storage cluster, that is, when the energy storage unit has thermal runaway, the fire-fighting liquid inlet branch pipe 203 is used to inject the fire-fighting medium into the energy storage pack 302 through the top opening of the pack shell 303, and the fire-fighting medium overflowing through the top opening of the pack shell 303 enters the sealed cluster shell 305 until the liquid level of the fire-fighting medium reaches the overflow return liquid pipe 306 to immerse all the energy storage packs 302 in the energy storage cluster 305. In this embodiment, the overflow return liquid pipe 306 is connected to the return liquid tank 204.

[0076] Specifically, the number and position of the compartment-level liquid storage tanks 310 can be set in a variety of ways, as follows.

[0077] (1) There is one compartment-level liquid storage tank 310, which is arranged at the bottom of the corresponding energy storage compartment 300. Figure 4 , as shown in Figure 8.

[0078] (2) There is one compartment-level liquid storage tank 310, which is arranged on the top of the corresponding energy storage compartment 300. In order to allow the temperature control medium to flow back into the compartment-level liquid storage tank 310, a liquid return pump 324 is provided on the temperature-averaging liquid return main pipe 315. Figure 2 , as shown in 7.

[0079] (3) There are two compartment-level liquid storage tanks 310, which are a bottom liquid storage tank 310a and a top liquid storage tank 310b. The bottom liquid storage tank 310a and the top liquid storage tank 310b are located at the top and bottom of the corresponding energy storage compartment 300, respectively. Figure 5As shown. In this embodiment, the temperature-averaging liquid inlet main pipe 311 is connected to the top liquid storage tank 310b, and the temperature-averaging liquid return main pipe 315 is connected to the bottom liquid storage tank 310a; a lifting pipe 325 is provided between the bottom liquid storage tank 310a and the top liquid storage tank 310b, and a lifting pump 326 is provided on the lifting pipe 325 for pumping the temperature control medium in the bottom liquid storage tank 310a into the top liquid storage tank 310b. Of course, in some other embodiments, the temperature-averaging liquid inlet main pipe 310 is connected to the bottom liquid storage tank 310a, the temperature-averaging liquid return main pipe 315 is connected to the top liquid storage tank 310b, and a liquid return pump 324 is provided on the temperature-averaging liquid return main pipe 315; a connecting pipe is provided between the bottom liquid storage tank 310a and the top liquid storage tank 310b, and the connecting pipe is used to transfer the temperature control medium in the top liquid storage tank 310b to the bottom liquid storage tank 310a.

[0080] In this embodiment, an exhaust hole 328 and an exhaust fan 329 are provided on the top of the energy storage compartment 300. Figure 1 When the package shell 303 adopts a closed structure, when the temperature-averaging liquid return main pipe 315 is connected to the compartment-level liquid storage tank 310 located at the bottom of the energy storage compartment 300, the tops of all the temperature-controlled liquid return branch pipes 316 arranged on the temperature-averaging liquid return main pipe 315 are provided with exhaust branch pipes 330 extending to the top of the energy storage compartment 300, as shown in FIG. Figure 4 ,8; Of course, in some other embodiments, the compartment-level liquid storage tank 310 located at the bottom of the energy storage compartment 300 may also be provided with an exhaust pipe extending to the top of the energy storage compartment 300. When the temperature-averaging liquid return main pipe 315 is connected to the compartment-level liquid storage tank 310 located at the top of the energy storage compartment 300, the compartment-level liquid storage tank 310 located at the top of the energy storage compartment 300 is provided with an exhaust port. This ensures that even if the package shell 303 adopts a closed structure, the gas can be discharged in time to control the air pressure in the energy storage compartment 300, the energy storage cluster 301 and the energy storage package 302.

[0081] Specifically, there are many ways to install the energy storage pack 302. For example, the energy storage cluster 301 includes a cluster bracket, and the pack shell 303 can be fixedly installed on the cluster bracket, or a placement platform for placing the energy storage pack 302 can be provided on the cluster bracket, and the energy storage pack 302 can be placed as a whole on the corresponding placement platform.

[0082] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A temperature-dissipation integrated submerged energy storage system, characterized in that: It includes a temperature control unit, a fire fighting unit and at least one energy storage compartment, wherein at least one energy storage cluster is arranged in the energy storage compartment, and at least one energy storage pack is installed in the energy storage cluster; The energy storage compartment is provided with an average temperature piping system, and the average temperature piping system includes a compartment-level liquid storage tank, an average temperature liquid inlet main pipe and an average temperature liquid return main pipe; the average temperature liquid inlet main pipe is connected to the compartment-level liquid storage tank; the average temperature liquid inlet main pipe is provided with an average temperature liquid inlet branch pipe; the average temperature liquid inlet branch pipe is provided in a one-to-one correspondence with the energy storage clusters arranged in the same energy storage compartment; the average temperature liquid inlet branch pipe is provided with an average temperature liquid inlet branch pipe, and the average temperature liquid inlet branch pipe is provided in a one-to-one correspondence with the energy storage packs arranged in the same energy storage cluster. The temperature-averaging liquid inlet branch pipe is connected to the corresponding energy storage pack; the temperature-averaging liquid return main pipe is provided with a temperature-averaging liquid return branch pipe, and the temperature-averaging liquid return branch pipe is arranged one-to-one with the energy storage clusters arranged in the same energy storage compartment; the temperature-averaging liquid return branch pipe is provided with a temperature-averaging liquid return branch pipe, and the temperature-averaging liquid return branch pipe is arranged one-to-one with the energy storage packs arranged in the same energy storage cluster, and the temperature-averaging liquid return branch pipe is connected to the corresponding energy storage pack; the temperature-averaging liquid inlet main pipe is provided with a temperature-averaging liquid inlet pump; The temperature control unit is provided with a temperature control liquid outlet main pipe and a temperature control liquid return main pipe, the temperature control liquid outlet main pipe is provided with a temperature control liquid outlet branch pipe, the temperature control liquid outlet branch pipe is arranged in a one-to-one correspondence with the energy storage compartment, and the temperature control liquid outlet branch pipe is connected to the compartment-level liquid storage tank arranged in the corresponding energy storage compartment; the temperature-averaging liquid return main pipe is provided with a first liquid return branch and a second liquid return branch, the first liquid return branch is connected to the corresponding compartment-level liquid storage tank, and the second liquid return branch is connected to the temperature control liquid return main pipe; The fire-fighting unit is provided with a fire-fighting liquid inlet main pipe, and the fire-fighting liquid inlet main pipe is provided with a fire-fighting liquid inlet branch pipe, and the fire-fighting liquid inlet branch pipe is arranged in a one-to-one correspondence with the energy storage cluster, and the fire-fighting liquid inlet branch pipe is provided with a fire-fighting liquid inlet branch pipe, and the fire-fighting liquid inlet branch pipe is arranged in a one-to-one correspondence with the energy storage packs arranged in the same energy storage cluster; the energy storage pack includes a pack shell, and at least one energy storage cell is installed in the pack shell, and the fire-fighting liquid inlet branch pipe is used to inject fire-fighting medium into the energy storage pack or spray the energy storage pack when the energy storage cell in the corresponding energy storage pack has thermal runaway.

2. The temperature-dissipation integrated submerged energy storage system according to claim 1 is characterized in that: The temperature-averaging liquid inlet branch pipe is connected to the bottom of the energy storage pack; each of the temperature-averaging liquid inlet branch pipes is provided with a temperature-averaging liquid inlet solenoid valve for controlling the liquid inlet flow rate.

3. The temperature-dissipation integrated submerged energy storage system according to claim 1 is characterized in that: The temperature-averaging liquid return branch pipe is connected to the top of the energy storage pack to control the height of the immersion liquid level in the energy storage pack; each of the temperature-averaging liquid return branch pipes is provided with a temperature-averaging liquid return solenoid valve for controlling the return liquid flow rate.

4. The temperature-dissipation integrated submerged energy storage system according to claim 1 is characterized in that: The first liquid return branch and the second liquid return branch are respectively provided with liquid return control valves for controlling the temperature control medium to return to the corresponding compartment-level liquid storage tank or the temperature control unit.

5. The temperature-dissipation integrated submerged energy storage system according to claim 1 is characterized in that: The package shell adopts a closed structure; a package-level explosion-proof valve is provided on the top of the package shell, and the liquid outlet of the fire-fighting liquid inlet branch pipe is arranged directly above the package-level explosion-proof valve; or, the fire-fighting liquid inlet branch pipe is connected to the inside of the package shell.

6. The temperature-dissipation integrated submerged energy storage system according to claim 5 is characterized in that: The energy storage compartment is provided with a compartment shell capable of storing fire-fighting media, or the energy storage cluster is provided with a cluster shell capable of storing fire-fighting media.

7. The temperature-dissipation integrated submerged energy storage system according to claim 6 is characterized in that: An overflow liquid return pipe is arranged on the top of the compartment shell or the cluster shell.

8. The temperature-dissipation integrated submerged energy storage system according to claim 7 is characterized in that: It also includes a liquid return tank, and the overflow liquid return pipe is connected to the liquid return tank.

9. The temperature-dissipation integrated submerged energy storage system according to claim 5, characterized in that: The fire-fighting liquid inlet branch pipe is communicated with the interior of the package shell, a liquid return groove is provided at the bottom of the energy storage compartment or the bottom of the energy storage cluster, and a bottom liquid return pipe is provided at the bottom of the liquid return groove.

10. The temperature-dissipation integrated submerged energy storage system according to claim 9, characterized in that: It also includes a liquid return tank, and the bottom liquid return pipe is connected to the liquid return tank.

11. The temperature-dissipation integrated submerged energy storage system according to claim 1, characterized in that: The outer shell of the package adopts an open structure with a top opening; the fire-fighting liquid inlet branch pipe is located above the top opening of the outer shell of the package, and the fire-fighting liquid inlet branch pipe is provided with a fire-fighting liquid outlet for injecting fire-fighting medium into the outer shell of the package.

12. The temperature-dissipation integrated submerged energy storage system according to claim 11, characterized in that: At least one energy storage unit is installed in the outer shell of the package, and the fire-fighting liquid outlet is arranged in a one-to-one correspondence with the energy storage unit in the corresponding energy storage package.

13. The temperature-dissipation integrated submerged energy storage system according to claim 12, characterized in that: A monomer explosion-proof valve is arranged on the top surface of the energy storage monomer, and the fire-fighting liquid outlet is arranged just above the corresponding monomer explosion-proof valve.

14. The temperature-dissipation integrated submerged energy storage system according to claim 13, characterized in that: The fire-fighting liquid outlet is provided with a fire-fighting sealing membrane which is opened when the single explosion-proof valve explodes.

15. The temperature-dissipation integrated submerged energy storage system according to claim 11, characterized in that: The energy storage compartment is provided with a sealed compartment shell, or the energy storage cluster is provided with a sealed cluster shell.

16. The temperature-dissipation integrated submerged energy storage system according to claim 15, characterized in that: An overflow liquid return pipe is arranged on the top of the compartment shell or the cluster shell.

17. The temperature-dissipation integrated submerged energy storage system according to claim 16, characterized in that: It also includes a liquid return tank, and the overflow liquid return pipe is connected to the liquid return tank.

18. The temperature-dissipation integrated submerged energy storage system according to claim 1, characterized in that: The compartment-level liquid storage tank is provided as one, and the compartment-level liquid storage tank is arranged at the bottom or top of the corresponding energy storage compartment; when the compartment-level liquid storage tank is arranged at the top of the corresponding energy storage compartment, the temperature-averaging liquid return main pipe is provided with a liquid return pump.

19. The temperature-dissipation integrated submerged energy storage system according to claim 1, characterized in that: The compartment-level liquid storage tanks are provided with two, and the two compartment-level liquid storage tanks are respectively a bottom liquid storage tank and a top liquid storage tank, and the bottom liquid storage tank and the top liquid storage tank are respectively located at the top and the bottom of the corresponding energy storage compartment; The temperature-averaging liquid inlet main pipe is connected to the top liquid storage tank, and the temperature-averaging liquid return main pipe is connected to the bottom liquid storage tank; a lifting pipe is provided between the bottom liquid storage tank and the top liquid storage tank, and a lifting pump is provided on the lifting pipe for pumping the temperature control medium in the bottom liquid storage tank into the top liquid storage tank; or, The temperature-averaging liquid inlet main pipe is connected to the bottom liquid storage tank, the temperature-averaging liquid return main pipe is connected to the top liquid storage tank, and a liquid return pump is provided on the temperature-averaging liquid return main pipe; a connecting pipe is provided between the bottom liquid storage tank and the top liquid storage tank.

20. The temperature-dissipation integrated submerged energy storage system according to claim 1, characterized in that: An exhaust hole and an exhaust fan are provided on the top of the energy storage compartment.

21. The temperature-dissipation integrated submerged energy storage system according to claim 20, characterized in that: When the temperature-averaging liquid return main pipe is connected to the compartment-level liquid storage tank located at the bottom of the energy storage compartment, the tops of all the temperature-controlled liquid return branch pipes arranged on the temperature-averaging liquid return main pipe are provided with exhaust branch pipes extending to the top of the energy storage compartment, or, the compartment-level liquid storage tank located at the bottom of the energy storage compartment is provided with an exhaust pipe extending to the top of the energy storage compartment; when the temperature-averaging liquid return main pipe is connected to the compartment-level liquid storage tank located at the top of the energy storage compartment, the compartment-level liquid storage tank located at the top of the energy storage compartment is provided with an exhaust port.

22. The temperature-dissipation integrated submerged energy storage system according to claim 1, characterized in that: The energy storage cluster includes a cluster bracket, and the package shell is fixedly mounted on the cluster bracket; or, a placement platform for placing the energy storage package is provided on the cluster bracket.

23. The temperature-dissipation integrated submerged energy storage system according to claim 1, characterized in that: It also includes a liquid return tank, on which a fire-fighting liquid return main pipe is provided; The fire-fighting liquid return main pipe is connected to the temperature-averaging liquid return main pipe; or, The temperature-averaging liquid return branch pipe is provided with a fire-fighting liquid return branch, and the fire-fighting liquid return branch is connected to the fire-fighting liquid return main pipe; or, The fire-fighting liquid return main pipe is connected to a fire-fighting liquid return branch pipe, and the fire-fighting liquid return branch pipe is arranged in a one-to-one correspondence with the energy storage clusters arranged in the same energy storage compartment; the fire-fighting liquid return branch pipe is connected to a fire-fighting liquid return branch pipe, and the fire-fighting liquid return branch pipe is arranged in a one-to-one correspondence with the energy storage packs arranged in the same energy storage cluster; the fire-fighting liquid return branch pipe is connected to the corresponding energy storage pack.

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