Uniform temperature, temperature control and fire integrated immersion energy storage system

Abstract

The application discloses a kind of even temperature, temperature control and fire-fighting integrated immersed energy storage system, by being arranged even temperature pipeline system in energy storage compartment, the even temperature circulation of temperature control medium can be realized;Adopt the way of immersion to ensure that the temperature of energy storage cell under normal working condition is kept in the set temperature range, the difference between the temperature between different energy storage cells belonging to the same energy storage package and the temperature between energy storage cells belonging to different energy storage packages is smaller;Temperature control circulation is realized by setting temperature control unit, for quickly controlling the temperature of each energy storage package and the energy storage cell located in the energy storage package, so that the energy storage cell is kept in the set temperature range and runs;By setting fire-fighting unit, when there is energy storage cell thermal runaway, fire-fighting unit can quickly inject or spray fire-fighting medium into corresponding energy storage package through fire-fighting liquid inlet main pipe, fire-fighting liquid inlet branch pipe and fire-fighting liquid inlet branch pipe, fire-fighting immersion can be realized to reduce the influence range of thermal runaway.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric energy storage, and particularly relates to an even-temperature, temperature-control and fire-fighting integrated immersed energy storage system. BACKGROUND

[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 a positive feedback cycle process: the rising temperature causes the system to heat up, the system heats up, the temperature rises, and the system becomes hotter in turn. There are many reasons for lithium battery thermal runaway, mainly the following points.

[0003] 1) Overcharge triggers lithium battery thermal runaway: the battery itself has overcharge protection, but when this overcharge protection fails, the battery continues to charge, which triggers thermal runaway. With the continuous use of the battery, the aging of the battery gradually becomes serious, and the consistency of the battery pack becomes worse. At this time, the battery is prone to thermal safety problems if overcharged. Therefore, at any time, safe charging should be carried out according to the instructions.

[0004] 2) Overheat triggers lithium battery thermal runaway: during normal use of the lithium battery, when the battery maintains high-speed discharge or encounters extreme working conditions, it must continuously discharge large current. At this time, the temperature inside the battery begins to slowly rise, and if the discharge current is not limited in time, it is likely to cause lithium battery thermal runaway.

[0005] 3) Mechanical trigger lithium battery thermal runaway: lithium battery packs may be damaged by behaviors such as impact deformation, internal short circuit of the battery pack, and other behaviors that cause damage to the battery pack, which may trigger thermal runaway of the battery.

[0006] In addition to the above reasons, over-discharge of the battery and internal short circuit of the battery may also cause thermal runaway of the battery. In particular, during the thermal runaway and explosion stage of the battery, the oxygen produced by the reaction of the electrolyte and the positive electrode reacts violently, the battery catches fire, causing fire and explosion hazards, and posing a great threat to people's life and property safety. SUMMARY

[0007] Therefore, the purpose of the present application is to provide an even-temperature, temperature-control and fire-fighting integrated immersed energy storage system, which can achieve even-temperature control and temperature control under normal operating conditions, so that the temperature is maintained within a set temperature range; when thermal runaway occurs, fire-fighting immersion can be achieved to reduce the influence range of thermal runaway.

[0008] To achieve the above purpose, the present application provides the following technical solutions:

[0009] The application discloses an integrated temperature control and fire-fighting immersed energy storage system.

[0010] The temperature control unit is connected with a temperature control liquid inlet main pipe and a temperature control liquid return main pipe; a cluster-level liquid inlet pipe is connected to the temperature control liquid inlet main pipe, and the cluster-level liquid inlet pipe is arranged in one-to-one correspondence with the energy storage clusters; a package-level liquid inlet pipe is connected to the cluster-level liquid inlet pipe, and the package-level liquid inlet pipe is arranged in one-to-one correspondence with the energy storage packages arranged in the same energy storage cluster.

[0011] The energy storage compartment is provided with an equal-temperature pipeline system, which comprises a compartment-level liquid storage tank, an equal-temperature liquid inlet main pipe and an equal-temperature liquid return main pipe; an equal-temperature liquid inlet branch pipe is arranged on the equal-temperature liquid inlet main pipe; the equal-temperature liquid inlet branch pipe is arranged in one-to-one correspondence with the energy storage clusters arranged in the same energy storage compartment; an equal-temperature liquid inlet sub-pipe is arranged on the equal-temperature liquid inlet branch pipe, the equal-temperature liquid inlet sub-pipe is arranged in one-to-one correspondence with the energy storage packages arranged in the same energy storage cluster, and the equal-temperature liquid inlet sub-pipe is in communication with the corresponding energy storage package; an equal-temperature liquid return branch pipe is arranged on the equal-temperature liquid return main pipe, and the equal-temperature liquid return branch pipe is arranged in one-to-one correspondence with the energy storage clusters arranged in the same energy storage compartment; an equal-temperature liquid return sub-pipe is arranged on the equal-temperature liquid return branch pipe, and the equal-temperature liquid return sub-pipe is arranged in one-to-one correspondence with the energy storage packages arranged in the same energy storage cluster, and the equal-temperature liquid return sub-pipe is in communication with the corresponding energy storage package; the equal-temperature liquid return main pipe is connected with the compartment-level liquid storage tank; a compartment-level liquid outlet pipe is connected to the compartment-level liquid storage tank; a first liquid outlet branch and a second liquid outlet branch are arranged on the compartment-level liquid outlet pipe; the first liquid outlet branch and the second liquid outlet branch are respectively connected with the equal-temperature liquid inlet main pipe and the temperature control liquid return main pipe, or a first liquid return branch and a second liquid return branch are arranged on the equal-temperature liquid return main pipe, the first liquid return branch is connected with the compartment-level liquid storage tank, and the second liquid return branch is connected with the temperature control liquid return main pipe.

[0012] The fire-fighting unit is provided with a fire-fighting liquid inlet main pipe, a fire-fighting liquid inlet branch pipe is arranged on the fire-fighting liquid inlet main pipe, the fire-fighting liquid inlet branch pipe is arranged in one-to-one correspondence with the energy storage clusters, and a fire-fighting liquid inlet sub-pipe is arranged on the fire-fighting liquid inlet branch pipe, the fire-fighting liquid inlet sub-pipe is arranged in one-to-one correspondence with the energy storage packages arranged in the same energy storage cluster; the energy storage package comprises a package shell, an energy storage monomer group is arranged in the package shell, the energy storage monomer group comprises at least one energy storage monomer, and the fire-fighting liquid inlet sub-pipe is used for injecting or spraying a fire-fighting medium into the energy storage package when the energy storage monomer in the energy storage package is in thermal runaway.

[0013] Further, the equal-temperature liquid inlet sub-pipe is connected with the bottom of the energy storage package, and an equal-temperature liquid inlet electromagnetic valve for controlling the liquid inlet flow rate is arranged on each equal-temperature liquid inlet sub-pipe.

[0014] Further, the uniform temperature return liquid branch pipe is connected with the top of the energy storage package to control the immersion liquid level in the energy storage package.

[0015] Further, the package level liquid inlet pipe is connected with the bottom of the energy storage package, and each of the package level liquid inlet pipes is respectively provided with a package level liquid inlet electromagnetic valve for controlling the liquid inlet flow.

[0016] Further, the return liquid tank is provided with a fire-fighting return liquid main pipe;

[0017] The fire-fighting return liquid main pipe is connected with the uniform temperature return liquid main pipe; or,

[0018] The uniform temperature return liquid branch pipe is provided with a fire-fighting return liquid branch, and the fire-fighting return liquid branch is connected with the fire-fighting return liquid main pipe; or,

[0019] The fire-fighting return liquid main pipe is connected with a fire-fighting return liquid branch pipe, and the fire-fighting return liquid branch pipe is one-to-one correspondingly arranged with the energy storage cluster arranged in the same energy storage compartment; the fire-fighting return liquid branch pipe is connected with the corresponding energy storage package arranged in the same energy storage cluster; and the fire-fighting return liquid branch pipe is connected with the corresponding energy storage package.

[0020] Further, the compartment level liquid outlet pipe is provided with a compartment level liquid outlet pump.

[0021] Further, the compartment level liquid storage tank is one, and the compartment level liquid storage tank is arranged at the bottom or the 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 uniform temperature return liquid main pipe is provided with a return liquid pump.

[0022] Further, the compartment level liquid storage tank is 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.

[0023] The compartment level liquid outlet pipe is connected with the bottom liquid storage tank or the top liquid storage tank.

[0024] The uniform temperature liquid inlet main pipe is connected with the top liquid storage tank, the uniform temperature return liquid main pipe is connected with the bottom liquid storage tank; and when the compartment level liquid outlet pipe is connected with the bottom liquid storage tank, the compartment level liquid outlet pipe is connected with the uniform temperature liquid inlet main pipe through the first liquid outlet branch and the top liquid storage tank; when the compartment level liquid outlet pipe is connected with the top liquid storage tank, a lifting pipe is arranged between the bottom liquid storage tank and the top liquid storage tank, and a lifting pump is arranged on the lifting pipe for pumping the temperature control medium in the bottom liquid storage tank into the top liquid storage tank; or,

[0025] The uniform temperature liquid inlet main pipe is connected with the bottom liquid storage tank, the uniform temperature liquid return main pipe is connected with the top liquid storage tank, and a liquid return pump is arranged on the uniform temperature liquid return main pipe; when the compartment level liquid outlet pipe is connected with the bottom liquid storage tank, a connecting pipe is arranged between the bottom liquid storage tank and the top liquid storage tank; when the compartment level liquid outlet pipe is connected with the top liquid storage tank, the compartment level liquid outlet pipe is connected with the uniform temperature liquid inlet main pipe through the first liquid outlet branch and the bottom liquid storage tank.

[0026] Further, the top of the energy storage compartment is provided with an exhaust hole and an exhaust fan.

[0027] Further, the energy storage cluster comprises a cluster support, and the bag shell is fixedly installed on the cluster support; or, the cluster support is provided with a placement platform for placing the energy storage bag.

[0028] Further, a compartment level liquid inlet pipe is further included, the compartment level liquid inlet pipe is arranged in one-to-one correspondence with the energy storage compartments, and the cluster level liquid inlet pipes arranged in the same energy storage compartment are connected with the compartment level liquid inlet pipe, and the compartment level liquid inlet pipe is connected with the temperature control liquid inlet main pipe.

[0029] Further, the bag shell adopts airtight structure; the top of the bag shell is provided with a bag level explosion-proof valve, and the liquid outlet of the fire-fighting liquid inlet branch pipe is arranged directly above the bag level explosion-proof valve; or, the fire-fighting liquid inlet branch pipe is in communication with the inside of the bag shell.

[0030] Further, 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.

[0031] Further, the top of the compartment shell or the cluster shell is provided with an overflow liquid return pipe.

[0032] Further, a liquid return tank is further included, and the overflow liquid return pipe is connected with the liquid return tank.

[0033] Further, the fire-fighting liquid inlet branch pipe is in communication with the inside of the bag shell, the bottom of the energy storage compartment or the bottom of the energy storage cluster is provided with a liquid return groove, and the bottom of the liquid return groove is provided with a bottom liquid return pipe.

[0034] Further, a liquid return tank is further included, and the bottom liquid return pipe is connected with the liquid return tank.

[0035] Further, the top of the energy storage compartment is provided with an exhaust hole and an exhaust fan; when the uniform-temperature return liquid main pipe is connected with the compartment-level storage liquid tank at the bottom of the energy storage compartment, the top of all the temperature-controlled return liquid branch pipes provided on the uniform-temperature return liquid main pipe is provided with an exhaust branch pipe extending to the top of the energy storage compartment, or the compartment-level storage liquid tank 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 uniform-temperature return liquid main pipe is connected with the compartment-level storage liquid tank at the top of the energy storage compartment, the compartment-level storage liquid tank at the top of the energy storage compartment is provided with an exhaust hole; or the energy storage compartment is provided with an exhaust main pipe extending to the top of the energy storage compartment, and the top of the package shell is connected with an exhaust branch pipe connected with the exhaust main pipe.

[0036] Further, the package shell adopts an open structure with a top opening; the fire-fighting liquid inlet branch pipe is located above the top opening of the package shell, and the fire-fighting liquid inlet branch pipe is provided with a fire-fighting liquid outlet for injecting fire-fighting medium into the package shell.

[0037] Further, the fire-fighting liquid outlet is provided one-to-one corresponding to the energy storage cells arranged in the energy storage package.

[0038] Further, the top surface of the energy storage cell is provided with a cell explosion-proof valve, and the fire-fighting liquid outlet is arranged directly above the cell explosion-proof valve.

[0039] Further, the fire-fighting liquid outlet is provided with a fire-fighting sealing film which is broken when the cell explosion-proof valve is opened.

[0040] Further, the energy storage compartment is provided with a sealed compartment shell, or the energy storage cluster is provided with a sealed cluster shell.

[0041] Further, the top of the compartment shell or the cluster shell is provided with an overflow return liquid pipe.

[0042] Further, a return liquid tank is further included, and the overflow return liquid pipe is connected with the return liquid tank.

[0043] The beneficial effects of the present application are as follows:

[0044] The uniform-temperature, temperature-controlled and fire-fighting integrated immersion type energy storage system of the present application,

[0045] The application has the following advantages:

[0046] The application also has the following advantages:

[0047] 1) The temperature control medium and the fire-fighting medium both use safe liquid which is insulating and non-combustible. The thermal management system is composed of double circulation of temperature control and uniform temperature, so that the energy storage cells are completely immersed in the safe liquid medium, the temperature is adjusted, and the temperature rise and temperature consistency of the energy storage cells and the energy storage pack are effectively managed. When the energy storage charge and discharge rate is less than 1C, the temperature difference of the energy storage cells is less than 2℃, which effectively ensures the safe and reliable operation of the energy storage system, and prolongs the service life of the battery by more than 10%;

[0048] 2) The battery is immersed in the safe liquid during the whole operation process. When the battery overheats, the flammable substances ejected are first filtered by the safe liquid and then discharged from the energy storage system through independent exhaust holes and exhaust fans. At the same time, the fire-fighting medium is injected into the corresponding energy storage pack to prevent air from entering;

[0049] 3) When a certain energy storage monomer in a certain energy storage package is thermal runaway, the flowable heat insulation safety liquid between the energy storage monomers prevents the thermal spread of the thermal runaway of the energy storage monomers, and realizes that the energy storage system does not burn absolutely when the energy storage monomer is thermal runaway, and fundamentally solves the fire and explosion hazards of thermal runaway;

[0050] 4) The BMS acquisition board and the equalization board are immersed in the safety liquid, which can eliminate the heat dissipation cost of the circuit board, prevent thermal spread and fire hazards, and has a simple appearance. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to make the purpose, technical scheme and beneficial effects of the present application clearer, the present application provides the following drawings for illustration:

[0052] Figure 1 It is a structural schematic diagram of an embodiment of the uniform temperature, temperature control and fire-fighting integrated immersed energy storage system of the present application.

[0053] Figure 2 It is a structural schematic diagram when the compartment-level energy storage tank is arranged at the top.

[0054] Figure 3 It is an enlarged view of area A of Figure 2

[0055] Figure 4 It is an enlarged view of area B of Figure 2

[0056] Figure 5 It is a structural schematic diagram when the compartment-level energy storage tank is arranged at the bottom.

[0057] Figure 6 It is a structural schematic diagram when the compartment-level energy storage tank is two and the compartment-level liquid outlet pipe is connected with the bottom liquid storage tank.

[0058] Figure 7 It is an enlarged view of area C of Figure 6

[0059] Figure 8 It is a structural schematic diagram when the compartment-level energy storage tank is two and the compartment-level liquid outlet pipe is connected with the top liquid storage tank.

[0060] Figure 9 It is a structural schematic diagram when the uniform temperature liquid return main pipe is connected with the compartment-level liquid storage tank and the temperature control liquid return main pipe, respectively.

[0061] Figure 10 It is a structural schematic diagram when the package shell adopts an open structure.

[0062] Figure 11 It is an enlarged view of area D of Figure 10

[0063] Figure 12 ​​​​Fig. 3 is a structural schematic diagram of the temperature control system with a compartment level liquid inlet pipe.

[0064] Reference numerals:

[0065] 100 - temperature control unit; 101 - temperature control liquid outlet main pipe; 102 - temperature control liquid return main pipe; 103 - cluster level liquid inlet pipe; 104 - pack level liquid inlet pipe; 105 - pack level liquid inlet solenoid valve; 106 - compartment level liquid outlet pipe; 107 - first liquid outlet branch; 108 - second liquid outlet branch; 109 - first liquid outlet control valve; 110 - second liquid outlet control valve; 111 - compartment level liquid outlet pump; 112 - compartment level liquid inlet pipe; 113 - compartment level control valve; 114 - second liquid return branch; 115 - liquid return control valve;

[0066] 200 - fire control unit; 201 - fire control liquid inlet main pipe; 202 - fire control liquid inlet sub-pipe; 203 - fire control liquid inlet branch pipe; 204 - liquid return tank; 205 - fire control liquid return main pipe; 206 - fire control liquid return valve; 207 - fire control liquid return branch; 208 - fire control liquid return valve; 209 - fire control liquid return sub-pipe; 210 - fire control liquid return branch pipe;

[0067] 300 - energy storage compartment; 301 - energy storage cluster; 302 - energy storage pack; 303 - pack outer shell; 304 - pack level explosion-proof valve; 305 - cluster outer shell; 306 - overflow liquid return pipe; 307 - fire control liquid outlet;

[0068] 310 - compartment level liquid storage tank; 310a - bottom liquid storage tank; 310b - top liquid storage tank; 311 - uniform temperature liquid inlet main pipe; 312 - uniform temperature liquid inlet sub-pipe; 313 - uniform temperature liquid inlet branch pipe; 314 - uniform temperature liquid inlet solenoid valve; 315 - uniform temperature liquid return main pipe; 316 - uniform temperature liquid return sub-pipe; 317 - uniform temperature liquid return branch pipe; 318 - uniform temperature liquid return solenoid valve; 319 - first liquid return branch; 320 - liquid return control valve; 321 - uniform temperature liquid return valve; 322 - liquid return tank; 323 - bottom liquid return pipe; 324 - liquid return pump; 325 - riser pipe; 326 - riser pump; 328 - exhaust hole; 329 - exhaust fan; 330 - exhaust sub-pipe. DETAILED DESCRIPTION

[0069] The present application will be further described below in conjunction with the drawings and specific embodiments so that those skilled in the art can better understand the present application and implement it.

[0070] As Figure 1As shown, the temperature uniformity, temperature control and fire-fighting integrated immersion energy storage system of the embodiment comprises a temperature control unit 100, a fire-fighting unit 200 and at least one energy storage compartment 300, at least one energy storage cluster 301 is arranged in the energy storage compartment 300, and at least one energy storage package 302 is arranged in the energy storage cluster 301. Specifically, in the embodiment, four energy storage clusters 301 are arranged in each energy storage compartment 300, and seven energy storage packages 302 are arranged in each energy storage cluster 301. The energy storage compartment 300 of the embodiment is shown as two, of course, the number of energy storage compartments 300 can be set to one, three and more than three according to actual needs, which will not be repeated here.

[0071] As shown, Figures 2-12 As shown, the energy storage compartment 300 of the embodiment is provided with a temperature uniformity pipeline system, which comprises a compartment-level liquid storage tank 310, a temperature uniformity liquid inlet main pipe 311 and a temperature uniformity liquid return main pipe 315. The temperature uniformity liquid inlet main pipe 311 is provided with a temperature uniformity liquid inlet branch pipe 312, and the temperature uniformity liquid inlet branch pipe 312 is arranged one-to-one with the energy storage cluster 301 arranged in the same energy storage compartment 300, that is, in the embodiment, four temperature uniformity liquid inlet branch pipes 312 are arranged in each energy storage compartment 300. The temperature uniformity liquid inlet branch pipe 312 is provided with a temperature uniformity liquid inlet branch pipe 313, and the temperature uniformity liquid inlet branch pipe 313 is arranged one-to-one with the energy storage package 302 arranged in the same energy storage cluster 301, and the temperature uniformity liquid inlet branch pipe 313 is in communication with the corresponding energy storage package 302. That is, in the embodiment, seven temperature uniformity liquid inlet branch pipes 313 are arranged on each temperature uniformity liquid inlet branch pipe 312. In the preferred embodiment of the present embodiment, the temperature uniformity liquid inlet branch pipe 313 is connected with the bottom of the energy storage package 302, and each temperature uniformity liquid inlet branch pipe 313 is respectively provided with a temperature uniformity liquid inlet electromagnetic valve 314 for controlling the liquid flow of the temperature control medium. Due to the flow resistance of the temperature control medium in each energy storage package 302 and the different heights of different energy storage packages 302, the temperature uniformity liquid inlet electromagnetic valve 314 can make the difference in flow rate of the temperature control medium in different energy storage packages 302 within a set error range, so as to better play the effect of temperature uniformity control.

[0072] The temperature equalizing return liquid main pipe 315 is provided with temperature equalizing return liquid branch pipes 316, which are one-to-one corresponding to the energy storage clusters 301 arranged in the same energy storage compartment 300, i.e. four temperature equalizing return liquid branch pipes 316 are arranged in each energy storage compartment 300. The temperature equalizing return liquid branch pipes 317 are one-to-one corresponding to the energy storage packs 302 arranged in the same energy storage cluster 301, and the temperature equalizing return liquid branch pipes 317 are in communication with the corresponding energy storage packs 302, i.e. in this embodiment, seven temperature equalizing return liquid branch pipes 317 are arranged on each temperature equalizing return liquid branch pipe 316. In this embodiment, the temperature equalizing return liquid branch pipes 317 are connected to the top of the energy storage packs 302 to control the liquid level of the temperature control medium in the energy storage packs 302. In the preferred embodiment of this embodiment, a temperature equalizing return liquid electromagnetic valve 318 for controlling the return liquid flow of the medium is arranged on each temperature equalizing return liquid branch pipe 317, so that the liquid level in the energy storage packs 302 is maintained within a set range, so as to achieve the technical purpose of immersing the energy storage packs 302.

[0073] The temperature control unit 100 is provided with a temperature control liquid outlet main pipe 101 and a temperature control return liquid main pipe 102. The cluster level liquid inlet pipe 103 is connected to the temperature control liquid inlet main pipe 101, and the cluster level liquid inlet pipe 103 is one-to-one corresponding to the energy storage cluster 301, i.e. four cluster level liquid inlet pipes 103 are arranged in each energy storage compartment 300 of this embodiment. The pack level liquid inlet pipe 104 is connected to the cluster level liquid inlet pipe 103, and the pack level liquid inlet pipe 104 is one-to-one corresponding to the energy storage pack 302 arranged in the same energy storage cluster 301, i.e. seven pack level liquid inlet pipes 104 are arranged on each cluster level liquid inlet pipe 103 of this embodiment. In this embodiment, the pack level liquid inlet pipe 104 is connected to the bottom of the energy storage pack 302, and a pack level liquid inlet electromagnetic valve 105 for controlling the liquid inlet flow is arranged on each pack level liquid inlet pipe 104.

[0074] There are two ways for the temperature control medium to achieve temperature equalizing circulation and temperature control circulation:

[0075] The first way is that the temperature equalizing return liquid main pipe 315 is connected to the compartment level liquid storage tank 310, the compartment level liquid outlet pipe 106 is connected to the compartment level liquid storage tank 310, the first liquid outlet branch 107 and the second liquid outlet branch 108 are arranged on the compartment level liquid outlet pipe 106, the first liquid outlet branch 107 and the second liquid outlet branch 108 are connected to the temperature equalizing liquid inlet main pipe 311 and the temperature control return liquid main pipe 102 respectively, and the first liquid outlet control valve 109 and the second liquid outlet control valve 110 are arranged on the first liquid outlet branch 107 and the second liquid outlet branch 108 respectively, as shown in Figure 3As shown in FIG. 6, the temperature control medium in the compartment-level liquid storage tank 310 can enter the uniform temperature liquid inlet main pipe 311 to realize uniform temperature circulation, or can enter the temperature control liquid return main pipe 102 to realize temperature control circulation. In this embodiment, a compartment-level liquid outlet pump 111 is arranged on the compartment-level liquid outlet pipe 106 to provide power required for uniform temperature circulation and temperature control circulation. In actual application, the first liquid outlet branch 107 and the uniform temperature liquid inlet main pipe 311 can be made into one pipe, and the second liquid outlet branch 108 and the temperature control liquid return main pipe 102 can also be made into one pipe.

[0076] The second mode: the uniform temperature liquid return main pipe 315 is provided with a first liquid return branch 319 and a second liquid return branch 114. The first liquid return branch 319 is connected with the corresponding compartment-level liquid storage tank 310, and the second liquid return branch 114 is connected with the temperature control liquid return main pipe 102, as shown in FIG. 7. Figure 9 The first liquid return branch 319 is provided with a liquid return control valve 320, and the second liquid return branch 114 is provided with a liquid return control valve 115. The liquid return control valve 320 and the liquid return control valve 115 are used to control the temperature control medium to return to the corresponding compartment-level liquid storage tank 310 or the temperature control unit 100. Specifically, when the liquid return control valve 320 is opened and the liquid return control valve 115 is closed, the temperature control medium directly returns to the corresponding compartment-level liquid storage tank 310 through the first liquid return branch 319. When the liquid return control valve 320 is closed and the liquid return control valve 115 is opened, the temperature control medium returns to the temperature control unit 100 through the second liquid return branch 114. In actual application, the second liquid return branch 114 and the temperature control liquid return main pipe 102 can be made into one pipe.

[0077] In some embodiments of the present embodiment, the uniform temperature, temperature control and fire-fighting integrated immersion energy storage system further comprises a compartment-level liquid inlet pipe 112. The compartment-level liquid inlet pipe 112 is arranged one-to-one with the energy storage compartment 300, and the cluster-level liquid inlet pipes 103 arranged in the same energy storage compartment 300 are connected with the compartment-level liquid inlet pipe 112. The compartment-level liquid inlet pipe 112 is connected with the temperature control liquid inlet main pipe 101. The compartment-level liquid inlet pipe 112 is provided with a compartment-level control valve 113, which is used to control the temperature control circulation in the corresponding energy storage compartment 300, as shown in FIG. 8. Figure 12

[0078] ​The firefighting unit 200 is equipped with a firefighting main inlet pipe 201, which is then equipped with firefighting branch inlet pipes 202. These branch inlet pipes 202 correspond one-to-one with each energy storage cluster 301. In this embodiment, four firefighting branch inlet pipes 202 are installed within each energy storage compartment 300. In this embodiment, each firefighting branch inlet pipe 202 is equipped with firefighting branch inlet pipes 203. These branch inlet pipes 203 correspond one-to-one with each energy storage pack 302 within the same energy storage cluster 301. In this embodiment, seven firefighting branch inlet pipes 203 are installed within each firefighting branch inlet pipe 202. The energy storage pack 302 includes a pack housing 303, within which is mounted an energy storage cell group, each comprising at least one energy storage cell. The firefighting branch inlet pipes 203 are used to inject or spray firefighting medium into the pack 302 in the event of thermal runaway of an energy storage cell within the corresponding pack. In a preferred implementation manner of this embodiment, the temperature-averaging, temperature-control and fire-fighting 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.

[0079] There are several ways to return firefighting media, as follows.

[0080] like Figure 2 As shown in Figures 5, 6, 8, and 10, in one implementation of this 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 operating conditions, the fire-fighting liquid return valve 206 is closed. When a storage cell experiences thermal runaway, a 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. At the same time, the liquid return control valve 320 is closed, and the fire-fighting liquid return valve 206 is opened, allowing the liquid to flow into the liquid return tank 204, thereby preventing the fire-fighting medium from contaminating the compartment-level liquid storage tank 310 and the temperature control medium in the temperature control unit 100.

[0081] like Figure 9As shown, in another embodiment of the present embodiment, the fire-fighting return liquid branch pipe 207 is connected to the fire-fighting return liquid main pipe 205. The fire-fighting return liquid branch pipe 207 and the uniform temperature return liquid sub-pipe 316 are respectively provided with a uniform temperature return liquid valve 321 and a fire-fighting return liquid valve 208 for controlling the flow of liquid into the uniform temperature return liquid main pipe 315 or the fire-fighting return liquid main pipe 205. In normal working conditions, the uniform temperature return liquid valve 321 is opened, and the fire-fighting return liquid valve 208 is closed. When thermal runaway occurs in the energy storage cell, 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 at the same time, the uniform temperature return liquid valve 321 corresponding to the energy storage compartment 300 or the energy storage cluster 301 is closed, and the fire-fighting return liquid 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 return liquid tank 204 through the fire-fighting return liquid main pipe 205. Not only can the fire-fighting medium pollute the temperature control medium in the compartment-level liquid storage tank 310 and the temperature control unit 100, but also will not affect the normal operation of other energy storage compartments 300 or energy storage clusters 301.

[0082] As shown in FIG. 1, the energy storage cluster 301 is connected to the fire-fighting liquid inlet main pipe 201 and the fire-fighting return liquid main pipe 205. Figure 12 As shown, in another embodiment of the present embodiment, the fire-fighting return liquid branch pipe 207 is connected to the fire-fighting return liquid main pipe 205. The fire-fighting return liquid branch pipe 207 and the uniform temperature return liquid sub-pipe 316 are respectively provided with a uniform temperature return liquid valve 321 and a fire-fighting return liquid valve 208 for controlling the flow of liquid into the uniform temperature return liquid main pipe 315 or the fire-fighting return liquid main pipe 205. In normal working conditions, the uniform temperature return liquid valve 321 is opened, and the fire-fighting return liquid valve 208 is closed. When thermal runaway occurs in the energy storage cell, 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 at the same time, the uniform temperature return liquid valve 321 corresponding to the energy storage compartment 300 or the energy storage cluster 301 is closed, and the fire-fighting return liquid 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 return liquid tank 204 through the fire-fighting return liquid main pipe 205. Not only can the fire-fighting medium pollute the temperature control medium in the compartment-level liquid storage tank 310 and the temperature control unit 100, but also will not affect the normal operation of other energy storage compartments 300 or energy storage clusters 301.

[0083] The energy storage pack shell 303 has two structures, one is a closed structure, and the other is an open structure, as follows.

[0084] As shown in FIG. 1, the energy storage cluster 301 is connected to the fire-fighting liquid inlet main pipe 201 and the fire-fighting return liquid main pipe 205. Figures 2-9As shown, in one of the implementations of the present embodiment, the pack shell 303 adopts a closed structure. The top of the pack shell 303 is provided with a pack-level explosion-proof valve 304, and the outlet of the fire-fighting liquid inlet branch pipe 203 is arranged directly above the pack-level explosion-proof valve 304; or, the fire-fighting liquid inlet branch pipe 203 is in communication with the inside of the pack shell 303. Specifically, at this time, a compartment shell capable of storing fire-fighting medium can be arranged on the energy storage compartment 300, or a cluster shell capable of storing fire-fighting medium is arranged on the energy storage cluster 301; at the same time, an overflow liquid return pipe 306 is arranged on the top of the compartment shell or the cluster shell 305. In the present embodiment, the overflow liquid return pipe 306 is connected with the liquid return tank 204. In the present embodiment, each energy storage cluster 301 is provided with a cluster shell 305 capable of storing fire-fighting medium, and when thermal runaway occurs in the energy storage cell, the energy storage cluster 301 can be subjected to fire-fighting immersion, which can reduce the amount of fire-fighting medium used and will not affect the normal operation of other energy storage clusters 301. In some other implementations of the present embodiment, when the fire-fighting liquid inlet branch pipe 203 is in communication with the inside of the pack shell 303, a liquid return groove 322 is arranged at the bottom of the energy storage compartment 300 or the energy storage cluster 301, and a bottom liquid return pipe 323 is arranged at the bottom of the liquid return groove 322, and the bottom liquid return pipe 323 is connected with the liquid return tank 204. In this way, when thermal runaway occurs in the energy storage cell, fire-fighting medium can be injected into the corresponding energy storage pack 302 through the fire-fighting liquid inlet branch pipe 203, and at the same time, the temperature equalization liquid return electromagnetic valve 318 connected to the temperature equalization liquid return branch pipe 317 of the energy storage pack 302 is closed to prevent the fire-fighting medium from entering the temperature equalization liquid return branch pipe 316; in this way, the fire-fighting medium overflowing from the energy storage pack 302 is returned to the liquid return tank 204 through the liquid return groove 322 and the bottom liquid return pipe 323, and does not interfere with the normal operation of other energy storage packs 302 in the same energy storage cluster 301.

[0085] As Figures 10-11As 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 outlet 307 for injecting fire-fighting medium into the package shell 303 is provided on the fire-fighting liquid inlet branch pipe 203. In a preferred embodiment of this embodiment, at least one energy storage unit is installed in the package shell 303, and the fire-fighting liquid outlet is provided in a one-to-one correspondence with the energy storage unit provided in the corresponding energy storage package 302. Preferably, a unit explosion-proof valve is provided on the top surface of the energy storage unit, and the fire-fighting liquid outlet 307 is provided directly above the corresponding unit explosion-proof valve. In this case, a fire-fighting sealing membrane that is opened when the unit explosion-proof valve explodes can be provided on the fire-fighting liquid outlet 307. When the energy storage unit suffers thermal runaway and the unit explosion-proof valve is opened, the fire-fighting liquid outlet 307 can be automatically opened. In this embodiment, a sealed compartment shell is provided on the energy storage compartment 300, or a sealed cluster shell 305 is provided on the energy storage cluster. An overflow return pipe 306 is provided at the top of the compartment shell or cluster shell 305. In this embodiment, a sealed cluster shell 305 is provided on the energy storage cluster. In other words, when a thermal runaway occurs in an energy storage cell, a firefighting medium is injected into the energy storage pack 302 via the firefighting liquid inlet branch pipe 203 through the top opening of the pack shell 303. The firefighting medium overflowing through the top opening of the pack shell 303 enters the sealed cluster shell 305 until the liquid level of the firefighting medium reaches the overflow return pipe 306, submerging all energy storage packs 302 within the energy storage cluster 305. In this embodiment, the overflow return pipe 306 is connected to the return tank 204.

[0086] Specifically, the number and position of the compartment-level liquid storage tanks 310 can be set in a variety of ways, as follows.

[0087] (1) There is one compartment-level liquid storage tank 310, which is set at the bottom of the corresponding energy storage compartment 300. Figure 5 , as shown in 6.

[0088] (2) There is one compartment-level liquid storage tank 310, which is set on the top of the corresponding energy storage compartment 300. In order to enable the temperature control medium to flow back into the compartment-level liquid storage tank 310, a return liquid pump 324 is provided on the temperature-averaging return liquid main pipe 315. Figure 2 shown.

[0089] (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. 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. Specifically, Figure 6As shown, the compartment-level liquid outlet pipe 106 is connected to the bottom liquid storage tank 310a, the first liquid outlet branch 107 is connected to the top liquid storage tank 310b, and the second liquid outlet branch 108 is connected to the control-return liquid main pipe 102, i.e., the compartment-level liquid outlet pipe 106 is connected to the top liquid storage tank 310b through the first liquid outlet branch 107 and the top liquid storage tank 310b, and is connected to the uniform-temperature liquid inlet main pipe 311. Of course, the compartment-level liquid outlet pipe 106 can also be connected to the top liquid storage tank 310b, in which case a riser pipe 325 is arranged between the bottom liquid storage tank 310a and the top liquid storage tank 310b, and a riser pump 326 is arranged on the riser pipe 325 for pumping the temperature-control medium in the bottom liquid storage tank 310a into the top liquid storage tank 310b or the temperature-control unit 100, as shown. Figure 8 In other embodiments, the uniform-temperature liquid inlet main pipe 311 can also be connected to the bottom liquid storage tank 310a, the uniform-temperature liquid return main pipe 315 is connected to the top liquid storage tank 310b, and a return pump 324 is arranged on the uniform-temperature liquid return main pipe 315; when the compartment-level liquid outlet pipe 106 is connected to the bottom liquid storage tank 310a, a connecting pipe is arranged 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; when the compartment-level liquid outlet pipe 106 is connected to the top liquid storage tank 310b, the compartment-level liquid outlet pipe 106 is connected to the uniform-temperature liquid inlet main pipe 311 through the first liquid outlet branch 107 and the bottom liquid storage tank 310a.

[0090] In this embodiment, the top of the energy storage compartment 300 is provided with an exhaust hole 328 and an exhaust fan 329, as shown. Figure 1 When the uniform-temperature liquid return main pipe 315 is connected to the compartment-level liquid storage tank 310 at the bottom of the energy storage compartment 300, the top of each temperature-control liquid return branch pipe 316 arranged on the uniform-temperature liquid return main pipe 315 is provided with an exhaust branch pipe 330 extending to the top of the energy storage compartment 300, as shown. Figures 5-6 Of course, in other embodiments, an exhaust pipe extending to the top of the energy storage compartment 300 can also be arranged on the compartment-level liquid storage tank 310 at the bottom of the energy storage compartment 300. When the uniform-temperature liquid return main pipe 315 is connected to the compartment-level liquid storage tank 310 at the top of the energy storage compartment 300, the compartment-level liquid storage tank 310 at the top of the energy storage compartment 300 is provided with an exhaust hole. Thus, even when the package shell 303 adopts a closed structure, the gas can be timely exhausted to control the air pressure in the energy storage compartment 300, the energy storage cluster 301, and the energy storage package 302.

[0091] Specifically, the energy storage package 302 can be installed in various ways. For example, the energy storage cluster 301 includes a cluster support, the package shell 303 can be fixedly installed on the cluster support, or a placement platform for placing the energy storage package 302 can be arranged on the cluster support, and the energy storage package 302 is placed on the corresponding placement platform.

[0092] The above-described embodiments are merely preferred embodiments of the present application and the present application is not limited thereto. Any equivalent replacement or modification of the present application made by those skilled in the art based on the present application belongs to the scope of the present application. The scope of the present application is defined by the claims.

Claims

1. An immersion energy storage system integrating temperature equalization, temperature control and fire protection, characterized by: 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 provided in the energy storage compartment, and at least one energy storage pack is installed in the energy storage cluster; The temperature control unit is connected to a temperature control liquid inlet main pipe and a temperature control liquid return main pipe; the temperature control liquid inlet main pipe is connected to a cluster-level liquid inlet pipe, and the cluster-level liquid inlet pipe is arranged in a one-to-one correspondence with the energy storage cluster; the cluster-level liquid inlet pipe is connected to a pack-level liquid inlet pipe, and the pack-level liquid inlet pipe is arranged in a one-to-one correspondence with the energy storage packs arranged in the same energy storage cluster; The energy storage compartment is provided with a temperature equalizing piping system, which includes a compartment-level liquid storage tank, a temperature equalizing liquid inlet main pipe and a temperature equalizing liquid return main pipe; the temperature equalizing liquid inlet main pipe is provided with a temperature equalizing liquid inlet branch pipe; the temperature equalizing liquid inlet branch pipe is arranged in a one-to-one correspondence with the energy storage cluster arranged in the same energy storage compartment; the temperature equalizing liquid inlet branch pipe is provided with a temperature equalizing liquid inlet branch pipe, the temperature equalizing liquid inlet branch pipe is arranged in a one-to-one correspondence with the energy storage packs arranged in the same energy storage cluster, and the temperature equalizing liquid inlet branch pipe is communicated with the corresponding energy storage pack; the temperature equalizing liquid return main pipe is provided with a temperature equalizing liquid return branch pipe, the temperature equalizing 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 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 provided in a one-to-one correspondence with the energy storage packs provided in the same energy storage cluster, and the temperature-averaging liquid return branch pipe is communicated with the corresponding energy storage pack; the temperature-averaging liquid return main pipe is connected to the compartment-level liquid storage tank, and the compartment-level liquid storage tank is connected to a compartment-level liquid outlet pipe, and the compartment-level liquid outlet pipe is provided with a first liquid outlet branch and a second liquid outlet branch, and the first liquid outlet branch and the second liquid outlet branch are respectively connected to the temperature-averaging liquid inlet main pipe and the temperature-controlled return liquid main pipe; or, 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 compartment-level liquid storage tank, and the second liquid return branch is connected to the temperature-controlled return liquid main pipe; The fire-fighting unit is provided with a fire-fighting liquid inlet main pipe, and a fire-fighting liquid inlet branch pipe is provided on the fire-fighting liquid inlet main pipe. 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. 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 an energy storage cell group is installed in the pack shell, and the energy storage cell group includes at least one energy storage cell. The fire-fighting liquid inlet branch pipe is used to inject or spray fire-fighting medium into the energy storage pack when thermal runaway occurs in the energy storage cell in the corresponding energy storage pack.

2. The temperature-balancing, temperature-control and fire-fighting integrated immersion 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, and 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-balancing, temperature-control and fire-fighting integrated immersion 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.

4. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 1 is characterized in that: The package-level liquid inlet pipe is connected to the bottom of the energy storage pack, and each package-level liquid inlet pipe is provided with a package-level liquid inlet solenoid valve for controlling the liquid inlet flow rate.

5. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 1 is 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 pipe, and the fire-fighting liquid return branch pipe 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.

6. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 1 is characterized in that: The compartment-level liquid outlet pipe is provided with a compartment-level liquid outlet pump.

7. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 1 is characterized in that: 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.

8. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 1 is characterized in that: There are two compartment-level liquid storage tanks, which are a bottom liquid storage tank and a top liquid storage tank, respectively. The bottom liquid storage tank and the top liquid storage tank are located at the top and bottom of the corresponding energy storage compartment, respectively. The compartment-level liquid outlet pipe is connected to the bottom liquid storage tank or the top liquid storage tank; 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; and when the compartment-level liquid outlet pipe is connected to the bottom liquid storage tank, the compartment-level liquid outlet pipe is connected to the temperature-averaging liquid inlet main pipe through the first liquid outlet branch and the top liquid storage tank; when the compartment-level liquid outlet pipe is connected to the top 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; when the compartment-level liquid outlet pipe is connected to the bottom liquid storage tank, a connecting pipe is provided between the bottom liquid storage tank and the top liquid storage tank; when the compartment-level liquid outlet pipe is connected to the top liquid storage tank, the compartment-level liquid outlet pipe is connected to the temperature-averaging liquid inlet main pipe through the first liquid outlet branch and the bottom liquid storage tank.

9. The temperature-balancing, temperature-control and fire-fighting integrated immersion 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.

10. The temperature-balancing, temperature-control and fire-fighting integrated immersion 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, the cluster bracket is provided with a placement platform for placing the energy storage package.

11. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 1 is characterized in that: It also includes a compartment-level liquid inlet pipe, which is arranged in a one-to-one correspondence with the energy storage compartment, and the cluster-level liquid inlet pipes arranged in the same energy storage compartment are all connected to the compartment-level liquid inlet pipe, and the compartment-level liquid inlet pipe is connected to the temperature-controlled liquid inlet main pipe.

12. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to any one of claims 1 to 11, 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 interior of the package shell.

13. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 12, characterized in that: The energy storage compartment is provided with a compartment shell capable of storing a fire-fighting medium, or the energy storage cluster is provided with a cluster shell capable of storing a fire-fighting medium.

14. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 13, characterized in that: An overflow liquid return pipe is provided on the top of the compartment shell or the cluster shell.

15. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 14, characterized in that: It also includes a liquid return tank, and the overflow liquid return pipe is connected to the liquid return tank.

16. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 12, characterized in that: The fire-fighting liquid inlet branch pipe is communicated with the interior of the enclosure; a liquid return tank 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 tank.

17. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 16, characterized in that: It also includes a liquid return tank, and the bottom liquid return pipe is connected to the liquid return tank.

18. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 12, characterized in that: An exhaust hole and an exhaust fan are provided on 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 bottom of the energy storage compartment, the tops of all the temperature-controlled return liquid 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, an exhaust port is provided on the compartment-level liquid storage tank located at the top of the energy storage compartment; or an exhaust main pipe extending to the top of the energy storage compartment is provided in the energy storage compartment, and the top of the shell is connected to an exhaust branch pipe connected to the exhaust main pipe.

19. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to any one of claims 1 to 11, characterized in that: The shell body adopts an open structure with a top opening; the fire-fighting liquid inlet branch pipe is located above the top opening of the shell body, and the fire-fighting liquid inlet branch pipe is provided with a fire-fighting liquid outlet for injecting fire-fighting medium into the shell body.

20. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 19, characterized in that: The fire-fighting liquid outlets are arranged in a one-to-one correspondence with the energy storage units arranged in the corresponding energy storage packs.

21. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 20, characterized in that: A single explosion-proof valve is provided on the top surface of the energy storage unit, and the fire-fighting liquid outlet is arranged directly above the corresponding single explosion-proof valve.

22. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 21, 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.

23. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 19, 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.

24. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 23, characterized in that: An overflow liquid return pipe is provided on the top of the compartment shell or the cluster shell.

25. The temperature-balancing, temperature-control and fire-fighting integrated immersion energy storage system according to claim 24, characterized in that: It also includes a liquid return tank, and the overflow liquid return pipe is connected to the liquid return tank.

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