Liquid cooling energy storage box based on Pareto optimal integration

Abstract

The invention discloses a liquid-cooled energy storage box based on Pareto optimal integration. The liquid-cooled energy storage box comprises an energy storage box body, and a plurality of groups of lithium battery clusters, a control structure, a busbar connection structure and a liquid-cooled fire-fighting device which are positioned in the energy storage box body, the busbar connecting structure comprises a busbar body, the busbar body is detachably and horizontally arranged on the top wall in an energy storage box body, and the busbar body comprises insulating sections and reserved sections which are arranged in a staggered mode; the lithium battery cluster comprises a supporting frame, a plurality of lithium battery pack fixing frames used for supporting and placing lithium battery packs are correspondingly arranged on the two sides of the supporting frame in the height direction, the side, away from the partition plate, of the interior of the energy storage box body and the side, facing the lithium battery cluster, of the partition plate from top to bottom, and the liquid cooling fire fighting device comprises a double-layer fire fighting mechanism; and the double-layer fire-fighting mechanism comprises a liquid fire-fighting mechanism and a gas fire-fighting mechanism. On the premise that the size of the liquid cooling energy storage box is not changed, the energy storage capacity of the liquid cooling energy storage box is improved, and diversified energy storage requirements are met.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid-cooled energy storage boxes, and in particular to a liquid-cooled energy storage box based on Pareto optimal integration. Background Art

[0002] Energy storage is an important component and key supporting technology for smart grids, energy systems with a high proportion of renewable energy, and energy internet. As governments around the world have successively introduced relevant support policies for the energy storage industry, the scale of investment in the energy storage market has continued to increase, the layout of the industrial chain has continued to improve, the business model has become increasingly diversified, and the application scenarios have been accelerated. In China, the introduction of a series of policies has accelerated the development of the energy storage industry. The industry has reached the critical point of an explosion, and the spring of energy storage is coming.

[0003] The current energy storage market has huge potential and has begun to grow exponentially in recent years. Its explosive growth comes from the great help of energy storage in absorbing new energy. Lithium battery industrial and commercial energy storage equipment based on lithium-ion (mainly lithium iron phosphate) batteries has been vigorously developed. Through battery charging and discharging operations, it plays a role in peak shaving, serving as a backup power source, adjusting frequency, and participating in the construction of smart grids.

[0004] However, the existing liquid-cooled energy storage box has a low energy storage capacity and cannot meet the diverse energy storage needs. Therefore, the present application provides a liquid-cooled energy storage box based on Pareto optimal integration to solve the above problems. Summary of the invention

[0005] In order to overcome the above-mentioned shortcomings, the purpose of the present invention is to provide a liquid-cooled energy storage box based on Pareto optimal integration, which can increase its energy storage capacity and meet diversified energy storage needs without changing the size of the liquid-cooled energy storage box.

[0006] In order to achieve the above objectives, the technical solution adopted by the present invention is: a liquid-cooled energy storage box based on Pareto optimal integration, including an energy storage box body and multiple groups of lithium battery clusters, a control structure, a busbar connection structure and a liquid-cooled fire-fighting device located therein; the multiple groups of lithium battery clusters are separated from the control structure by a vertically arranged partition plate, the busbar connection structure includes a busbar body, the busbar body is detachably arranged horizontally on the top wall inside the energy storage box body, the busbar body includes staggered insulating sections and reserved sections, and the reserved sections are used to connect high-voltage cables; the lithium battery cluster includes a support frame, and both sides of the support frame in the height direction, the side of the energy storage box body away from the partition plate, and the side of the partition plate facing the lithium battery cluster are correspondingly arranged from top to bottom with a number of lithium battery pack fixing frames for supporting and placing lithium battery packs; the liquid-cooled fire-fighting device includes a double-layer fire-fighting mechanism; the double-layer fire-fighting mechanism includes a liquid fire-fighting mechanism and a gas fire-fighting mechanism.

[0007] Furthermore, the insulating section of the busbar body is coated with an insulating layer, and the reserved section is provided with a plurality of high-voltage cable connection holes. By providing the insulating section on the busbar body, when the busbar body is installed inside the energy storage box body, the distance between it and the high-voltage box located below it does not need to be too large.

[0008] Furthermore, the busbar connection structure also includes a plurality of busbar connection brackets, the busbar connection brackets include an upper bracket and a lower bracket symmetrically arranged in the upper and lower directions, at least one busbar slot is provided on the upper bracket and the lower bracket, and when the upper bracket and the lower bracket are fixedly connected by busbar connection bolts, a limited space for inserting the insulating section on the busbar body is formed between the relative busbar slots. The busbar connection brackets can support the installation of the busbar body, and the busbar body can be directly plugged into the busbar slots, which makes the installation easier, and the area where the busbar connection brackets are installed is an insulating section, which can further ensure the safety of the staff.

[0009] Furthermore, the top of the busbar connection bracket is screwed to the inner top wall of the energy storage box body through a locking fixing plate. The busbar connection bracket is detachably arranged in the energy storage box body, which is convenient for the staff to disassemble or maintain the busbar body at any time and convenient for operation.

[0010] Furthermore, the lithium battery pack fixing frame includes a fixing plate, a support plate and a connecting plate which are vertically arranged and used to be fixed to the support frame, a partition plate or the inner wall of the energy storage box. The two ends of the support plate in the length direction are respectively provided with a downwardly bent corner, and the corner is screwed to the connecting plate. A locking hole is provided at the end of the connecting plate away from the corner, and the locking screw passes through the locking hole to fix the connecting plate to the lithium battery pack. Connecting plates are provided at both ends of the support frame in the direction of feeding the lithium battery pack. The connecting plates are used to fix the lithium battery pack to the lithium battery pack fixing frame from the front. Compared with fixing it up and down with M8 bolts, it can better ensure that the lithium battery pack is not easy to shake back and forth during transportation, thereby ensuring the safety of the lithium battery pack during transportation. The downward bending setting of the corner can prevent the support frame from bouncing during transportation and affecting the above-mentioned locking screws. In addition, it can not only meet the subsequent fixed connection with the lithium battery pack, but also will not interfere with the lithium battery pack when it is transported to the support plate.

[0011] Furthermore, the lithium battery clusters are arranged in 12 clusters, the lithium battery cells are 314AH, and the battery pack is 52S.

[0012] Furthermore, the liquid fire fighting mechanism includes a water fire fighting connecting pipe which is at least partially parallel to the top of the energy storage box body, and the bottom of the water fire fighting connecting pipe is connected to the water inlet at the bottom of the energy storage box body. The gas fire fighting mechanism includes a fire fighting gas supply bottle and a gas supply main pipe which is connected thereto and vertically arranged. A gas supply bracket which is parallel to the top of the energy storage box body is arranged on the top of the gas supply main pipe, and a plurality of gas supply branch pipes are vertically arranged on the gas supply bracket, and each gas supply branch pipe is connected to a plurality of jet pipes from top to bottom.

[0013] Furthermore, a plurality of the jet tube arrays are on the gas supply branch pipe, and each jet tube is provided with a jet port at one end away from the gas supply branch pipe, and the jet port is connected to the air inlet on the lithium battery pack to spray the flame-retardant gas into the lithium battery pack.

[0014] Furthermore, the liquid cooling fire fighting device also includes a liquid cooling delivery pipeline, and the liquid cooling delivery pipeline is provided with a plurality of liquid cooling branches that can be connected to the liquid cooling inlet on the lithium battery pack, so as to cool the lithium battery pack by liquid cooling when the liquid cooling energy storage box is working, thereby reducing the risk of fire caused by insufficient heat dissipation of the lithium battery pack.

[0015] Furthermore, it also includes a deflation do not enter module, a fire control box and a sound and light alarm combination located on the same side as the fire gas supply bottle and inside the energy storage box. The deflation do not enter module and the sound and light alarm combination are electrically connected to the fire control box. The side of the energy storage box body is provided with electric air inlet shutters, a pressure relief plate and an electric exhaust valve.

[0016] Beneficial effects of the present invention: In the present invention, the busbar connection structure, a plurality of lithium battery clusters, a liquid-cooled fire-fighting device and a control structure cooperate with each other, and the interior of the energy storage box is reasonably divided into two limited spaces by a partition plate. Without changing the size of the liquid-cooled energy storage box, its energy storage capacity is increased to meet the diverse energy storage needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an isometric view of the overall structure of an embodiment of the present invention; Figure 2 It is a partial structural front view of an embodiment of the present invention; Figure 3 This is a schematic diagram of a busbar connection structure according to an embodiment of the present invention; Figure 4 A schematic diagram of a busbar connection structure according to an embodiment of the present invention from another perspective; Figure 5 It is a partial structural isometric view of a lithium battery pack fixing frame according to an embodiment of the present invention; Figure 6 for Figure 5 A is a schematic diagram of the enlarged structure of the middle part; Figure 7 It is an isometric view of the overall structure of a liquid-cooled fire-fighting device according to an embodiment of the present invention; Figure 8 It is an isometric view of the overall structure of a liquid-cooled fire-fighting device according to an embodiment of the present invention from another perspective; Fig. 9 for Figure 8 Schematic diagram of the enlarged structure of B; In the figure: 1. Energy storage box body; 2. Liquid cooling fire fighting device; 21. Liquid fire fighting mechanism; 211. Water fire fighting connecting pipe; 212. Three-way pipe 1; 213. Sprinkler head; 22. Gas fire fighting mechanism; 221. Fire fighting gas supply bottle; 222. Gas supply main pipe; 223. Gas supply bracket; 224. Gas supply branch pipe; 225. Jet pipe; 226. Jet port; 23. Locking assembly; 231. Fixing plate; 232. Locking piece 1; 233. Locking piece 2; 3. Deflation do not enter module; 4. Sound and light alarm combination; 5. Electric air inlet shutter; 6. Fire control box; 7. Pressure relief plate; 8. Electric exhaust valve ;9. Partition plate;10. Control structure;101. Distribution box;102. Combiner cabinet;103. Liquid cooling unit;11. Liquid cooling delivery pipeline;12. Liquid cooling branch;13. Busbar connection structure;131. Busbar body;132. Insulation section;133. Busbar connection bracket;134. Reserved section;135. Locking plate;136. Busbar connection bolt;137. Busbar slot;14. Support frame;15. Lithium battery pack fixing frame;151. Fixing plate;152. Support plate;153. Elbow;154. Connecting plate;155. Locking hole;156. Limiting plate;17. Water inlet. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] See attached Figures 1 to 9 As shown, a liquid-cooled energy storage box based on Pareto optimal integration in this embodiment includes an energy storage box body 1 and multiple groups of lithium battery clusters, a control structure 10, a busbar connection structure 13 and a liquid-cooled fire-fighting device 2 located therein; the multiple groups of lithium battery clusters and the control structure 10 are separated by a vertically arranged partition plate 9, and the partition plate 9 directly divides the energy storage box body 1 into two areas that do not interfere with each other, so that the lithium battery pack structure and the control structure 10 have their own storage space; The busbar connection structure 13 includes a busbar body 131, which is detachably arranged horizontally on the top wall inside the energy storage box body 1. The busbar body 131 includes insulating sections 132 and reserved sections 134 arranged alternately, and the reserved sections 134 are used to connect high-voltage cables. The arrangement of the insulating sections 132 on the busbar body 131 can facilitate the installation of the workers, and also makes it unnecessary to reserve too much space when the busbar body 131 is connected to the high-voltage box cable below it, thereby effectively reducing unnecessary space occupation.

[0020] The lithium battery cluster includes a support frame 14, and a plurality of lithium battery pack fixing frames 15 for supporting and placing lithium battery packs are correspondingly arranged from top to bottom on both sides of the support frame 14 in the height direction, the side of the energy storage box body 1 away from the partition plate 9, and the side of the partition plate 9 facing the lithium battery cluster; the arrangement of the lithium battery cluster can meet the installation and use of different numbers of lithium battery packs to increase its energy storage capacity and meet diverse energy storage needs.

[0021] Specifically, the high voltage box is arranged above each lithium battery cluster.

[0022] The liquid-cooled fire-fighting device 2 includes a double-layer fire-fighting mechanism; the double-layer fire-fighting mechanism includes a liquid fire-fighting mechanism 21 and a gas fire-fighting mechanism 22. The liquid fire-fighting mechanism 21 and the gas fire-fighting mechanism 22 cooperate with each other, and can not only spray water to extinguish the entire liquid-cooled energy storage box, but also spray flame-retardant gas to extinguish the fire inside a single lithium battery pack, thereby preventing the fire from spreading, improving the fire-fighting efficiency, and reducing the loss of the enterprise.

[0023] The insulating section 132 of the busbar body 131 is covered with an insulating layer, and a plurality of high-voltage cable connection holes are provided on the reserved section 134. By providing the insulating section 132 on the busbar body 131, when the busbar body 131 is installed inside the energy storage box body 1, the distance between it and the high-voltage box located below it does not need to be too large, see the attached Figure 2 , providing a larger height space for the setting of the bottom lithium battery cluster, making the space distribution more reasonable.

[0024] Specifically, the area of ​​the insulating section 132 on the busbar body 131 is larger than the area of ​​the reserved section 134 , so that most of the busbar body 131 is in an insulating state, and only the part that needs to be connected to the high-voltage cable is in a non-insulated state.

[0025] The busbar connection structure 13 also includes a plurality of busbar connection brackets 133, which include an upper bracket and a lower bracket symmetrically arranged in the upper and lower directions. At least one busbar slot 137 is provided on the upper bracket and the lower bracket. When the upper bracket and the lower bracket are fixedly connected by busbar connection bolts 136, a limited space is formed between the relative busbar slots 137 for inserting the insulating section 132 on the busbar body 131. The busbar connection bracket 133 can support the installation of the busbar body 131, and the busbar body 131 can be directly plugged into the busbar slot 137, which makes the installation easier, and the area where the busbar connection bracket 133 is installed is the insulating section 132, which can further ensure the safety of the staff.

[0026] For details, see the attached Figures 3 to 4 Each insulating section 132 on the busbar body 131 corresponds to a busbar connecting bracket 133, and each busbar connecting bracket 133 is provided with two busbar slots 137, so that each busbar connecting bracket 133 can support two busbar bodies 131 at the same time, which can effectively improve the installation efficiency of the busbar body 131.

[0027] The top of the busbar connection bracket 133 is screwed to the inner top wall of the energy storage box body 1 through a locking fixing plate 135. The busbar connection bracket 133 is detachably arranged in the energy storage box body 1, which is convenient for the staff to disassemble or maintain the busbar body 131 at any time, and is convenient for operation.

[0028] The lithium battery pack fixing frame 15 includes a fixing plate 151, a support plate 152 and a connecting piece 154 which are vertically arranged and used to be fixed to the support frame 14, the partition plate 9 or the inner wall of the energy storage box body 1. The two ends of the support plate 152 in the length direction are respectively provided with a downwardly bent corner 153, and the corner 153 is screwed to the connecting piece 154. A locking hole 155 is provided at one end of the connecting piece 154 away from the corner 153, and the locking screw passes through the locking hole 155 to fix the connecting piece 154 to the lithium battery pack. Connecting pieces 154 are arranged at both ends of the support frame 14 in the direction of feeding the lithium battery pack. The connecting pieces 154 are used to fix the lithium battery pack to the lithium battery pack fixing frame 15 from the front side. Compared with fixing it up and down with M8 bolts, it can better ensure that the lithium battery pack is not easy to shake forward and backward during transportation, thereby ensuring the safety of the lithium battery pack during transportation. The downward bending setting of the corner 153 can prevent the support frame 14 from jumping during transportation and affecting the above-mentioned locking screws. In addition, it can not only meet the subsequent fixed connection with the lithium battery pack, but also will not cause interference to the lithium battery pack when it is transported to the support plate 152.

[0029] The fixing plate 151 and the supporting plate 152 are L-shaped and integrally formed. The supporting plate 152 is horizontally arranged to support the lithium battery pack placed thereon. A plurality of limiting plates 156 are spaced apart on the fixing plate 151 to limit the movement of the lithium battery pack in the height direction during transportation.

[0030] It should be noted that the space formed between the upper and lower support plates 152 is the height-limited space for placing the lithium battery pack.

[0031] In some embodiments, the lithium battery clusters are arranged in 12 clusters, the lithium battery cells are 314AH, and the battery pack is 52S.

[0032] The details are as follows: Currently, the 20-foot standard container on the market is composed of 10 lithium battery clusters, each cluster contains 8 lithium battery packs, a single lithium battery cell is 280Ah, and the voltage is 3.2V. The original energy of the 20-foot standard container is 280*3.2*48*8*10 / 1000000=3.44MWh. For container energy storage users, the overall demand is often 20MWh, 50MWh, 100MWh and other capacities, and the existing 3.44MWh capacity is not suitable.

[0033] Taking the minimum capacity loss as the optimization goal, the model is as follows:

[0034] In the formula, A represents the number of cells connected in series; X represents the cell capacity; b represents the number of clusters; m represents the voltage of a single cell is 3.2V; and n represents that there are 8 lithium battery packs in a single cluster.

[0035] When b=10, the solution is:

[0036] According to the above formula, when there are 12 lithium battery clusters, the lithium battery cell is 314AH, and the battery pack is 52S, the capacity of the overall liquid-cooled energy storage box can meet 5MWh, effectively increasing its energy storage capacity.

[0037] The liquid cooling fire fighting device 2 further includes a liquid cooling delivery pipeline 11, on which a plurality of liquid cooling branches 12 are provided that can be connected to the liquid cooling inlet on the lithium battery pack. When the liquid cooling energy storage box is working, the lithium battery pack is cooled by liquid cooling to reduce the risk of fire caused by insufficient heat dissipation of the lithium battery pack.

[0038] The liquid fire fighting mechanism 21 includes a water fire fighting connecting pipe 211 which is at least partially parallel to the top of the energy storage box body 1, and the bottom of the water fire fighting connecting pipe 211 is connected to the water inlet 17. The gas fire fighting mechanism 22 includes a fire fighting gas supply bottle 221 and a gas supply main pipe 222 which is connected thereto and vertically arranged. A gas supply bracket 223 which is parallel to the top of the energy storage box body 1 is arranged on the top of the gas supply main pipe 222, and a plurality of gas supply branch pipes 224 are vertically arranged on the gas supply bracket 223, and each gas supply branch pipe 224 is connected to a plurality of jet pipes 225 from top to bottom. The liquid fire fighting mechanism 21 is installed on the top wall inside the energy storage box body 1. When a fire occurs inside the energy storage box body 1, the liquid fire fighting mechanism 21 starts to work, the water inlet 17 is connected to the external water source, and the water fire fighting connecting pipe 211 sprays water to the entire interior of the energy storage box body 1 to extinguish the fire. When a single lithium battery pack is on fire, the jet pipe 225 corresponding to the single lithium battery pack sprays flame-retardant gas into the lithium battery pack, and the fire is quickly extinguished for the burning lithium battery pack, which effectively prevents the fire from spreading, and at the same time can improve the fire extinguishing efficiency and reduce corporate losses.

[0039] By means of the parallel arrangement of the air supply bracket 223 and the water fire-fighting connecting pipe 211 which is at least partially parallel to the top of the energy storage box body 1, it is possible to ensure that any fire point in the energy storage box body 1 can be covered and extinguished by the double-layer fire-fighting mechanism to avoid the fire spreading due to the four corners of the fire extinguishing.

[0040] At least part of the water fire fighting connecting pipe 211 and the air supply bracket 223 are detachably connected to the top of the energy storage box body 1, so that the staff can replace or maintain the air supply bracket 223 or the water fire fighting connecting pipe 211 at any time, which is easy to operate and quick to replace or maintain.

[0041] The water fire fighting connecting pipe 211 includes a vertical section and a horizontal section, one end of the vertical section is connected to the water inlet 17, and the horizontal section includes multiple hollow pipes connected through a three-way pipe 212, and each of the three-way pipes 212 is connected to a sprinkler head 213 at the lower end opening. The horizontal section of the water fire fighting connecting pipe 211 is connected end to end through multiple hollow pipes, which is convenient for the staff to quickly inspect and replace pipes, and effectively maintain the entire liquid fire fighting mechanism 21; when extinguishing a fire, external water enters the water fire fighting connecting pipe 211 from the water inlet 17, passes through multiple hollow pipes and is sprayed out from the sprinkler head 213 thereon, and the entire energy storage box body 1 is sprinkled with water to extinguish the fire.

[0042] The two adjacent hollow tubes are connected to the top wall of the energy storage box body 1 through the locking assembly 23. The water fire fighting connecting pipe 211 is fixed to the energy storage box body 11 by setting the locking assembly 23 to prevent the water fire fighting connecting pipe 211 from falling from the top when sprinkling water to extinguish the fire, thereby affecting the fire extinguishing.

[0043] The locking assembly 23 includes a fixing plate 231, a locking member 1 232 and a locking member 233. The locking member 1 232 and the locking member 2 233 are respectively located at the upper and lower sides of the horizontal section of the water fire fighting connecting pipe 211 and are locked by locking screws. A plurality of threaded holes are provided on the fixing plate 231, and the screws pass through the threaded holes and are threadedly connected to the top of the energy storage box body 1. The fixing plate 231 is fixed to the water fire fighting connecting pipe 211 by the locking member 1 232, the locking member 233 and the locking screws, and is then locked to the top of the energy storage box body 1 by the screws, so as to fix the position of the water fire fighting connecting pipe 211 and ensure the fire extinguishing effect of the liquid fire fighting mechanism 21 in the later stage.

[0044] A plurality of the jet pipes 225 are arrayed on the gas supply branch pipe 224. Each jet pipe 225 is provided with a jet port 226 at one end away from the gas supply branch pipe 224. The jet port 226 is connected to the air inlet on the lithium battery pack to spray the flame-retardant gas into the lithium battery pack. Each air inlet on the lithium battery pack corresponds to a jet port 226. When a single lithium battery pack is on fire, the jet pipe 225 corresponding to the single lithium battery pack sprays the flame-retardant gas into the lithium battery pack. The rapid fire extinguishing operation on the burning lithium battery pack can effectively prevent the fire from spreading.

[0045] In some embodiments, the flame-retardant gas in the fire-fighting gas supply bottle 221 is perfluoroacetone.

[0046] The gas supply bracket 223 is composed of a plurality of gas supply pipe fittings connected at the end, and two adjacent gas supply pipe fittings are connected by a tee pipe. The lower end surface of each tee pipe is connected to the nozzle through a connector, and the connector is provided with an ear bracket that can be threadedly connected to the top of the energy storage box body 1. The gas fire fighting mechanism 22 is detachably connected to the energy storage box body 11 through the ear bracket on the connector, which is convenient for the staff to quickly inspect and replace the pipe fittings, and effectively maintain the gas fire fighting mechanism 22 as a whole.

[0047] The liquid cooling fire fighting device 2 further includes a liquid cooling delivery pipeline 11, on which a plurality of liquid cooling branches 12 are provided that can be connected to the liquid cooling inlet on the lithium battery pack. When the liquid cooling energy storage box is working, the lithium battery pack is cooled by liquid cooling to reduce the risk of fire caused by insufficient heat dissipation of the lithium battery pack.

[0048] It also includes a deflation-do not enter module 3, a fire control box 6, and a sound and light alarm combination 4, which are located on the same side as the fire gas supply bottle 221 and inside the energy storage box body 1. The deflation-do not enter module 3 and the sound and light alarm combination 4 are electrically connected to the fire control box 6. The sound and light alarm combination 4, the deflation-do not enter module 3, and the fire control box 6 are electrically connected. When a fire occurs in the liquid-cooled energy storage box, the sound and light alarm combination 4 responds, and the internal detector detects the source of the fire. If a fire point occurs inside the lithium battery pack and the energy storage box body 1, the double-layer fire-fighting mechanism works synchronously to extinguish the corresponding lithium battery pack and the energy storage box body 1 as a whole, avoiding further spread of the fire hazard; at the same time, the deflation-do not enter module 3 lights up to remind the staff that a fire is being extinguished inside to avoid personal injury.

[0049] The side of the energy storage box body 1 is provided with an electric air intake louver 5, a pressure relief plate 7 and an electric exhaust valve 8. The electric air intake louver 5 can be closed by electric control so as to isolate the space storing the lithium battery from the outside in case of a fire accident, and the electric exhaust valve 8 can quickly discharge the dust inside the energy storage box body 1 in case of a fire.

[0050] It should be noted that a plurality of composite detectors are arranged inside the energy storage box body 1 for detecting the conditions inside the energy storage box body 1 so that the sound and light alarm combination 4 can promptly feedback whether a fire occurs.

[0051] The control structure 10 includes a distribution box 101, a junction box 102 and a liquid cooling unit 103. The side of the partition plate 9 away from the lithium battery cluster is divided into two upper and lower spaces by a partition frame 1. The upper space is used to place the liquid cooling unit 103, and the lower space is divided into a left space and a right space side by side by a partition frame 2. The left space is used to place the distribution box 101 and the junction box 102 up and down, and the right space is used to place the fire gas supply bottle 221. Furthermore, the internal space of the energy storage box body 1 is reasonably allocated to maximize its utilization rate.

[0052] The above implementation modes are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid-cooled energy storage box based on Pareto optimal integration, characterized in that: It includes an energy storage box body and multiple groups of lithium battery clusters, a control structure, a busbar connection structure and a liquid-cooled fire-fighting device located inside the energy storage box; the multiple groups of lithium battery clusters and the control structure are separated by a vertically arranged partition plate. A busbar connection structure, comprising a busbar body, the busbar body being detachably arranged horizontally on the top wall inside the energy storage box body, the busbar body comprising insulating sections and reserved sections arranged alternately, the reserved sections being used to connect high-voltage cables; A lithium battery cluster, comprising a support frame, wherein both sides of the support frame in the height direction, a side of the energy storage box body away from the partition plate, and a side of the partition plate facing the lithium battery cluster are provided with a plurality of lithium battery pack fixing frames for supporting and placing lithium battery packs from top to bottom; The liquid-cooled fire-fighting device comprises a double-layer fire-fighting mechanism; the double-layer fire-fighting mechanism comprises a liquid fire-fighting mechanism and a gas fire-fighting mechanism.

2. A liquid-cooled energy storage box based on Pareto optimal integration according to claim 1, characterized in that: The insulating section of the busbar body is covered with an insulating layer, and a plurality of high-voltage cable connection holes are provided on the reserved section.

3. A liquid-cooled energy storage box based on Pareto optimal integration according to claim 2, characterized in that: The busbar connection structure also includes a plurality of busbar connection brackets, and the busbar connection brackets include an upper bracket and a lower bracket symmetrically arranged up and down. At least one busbar slot is provided on the upper bracket and the lower bracket. When the upper bracket and the lower bracket are fixedly connected by busbar connection bolts, a limited space is formed between the relative busbar slots for inserting the insulating segment on the busbar body.

4. The liquid-cooled energy storage box based on Pareto optimal integration according to claim 3, characterized in that: The top of the busbar connection bracket is screwed to the inner top wall of the energy storage box body through a locking fixing plate.

5. The liquid-cooled energy storage box based on Pareto optimal integration according to claim 1, characterized in that: The lithium battery pack fixing frame includes a fixing plate, a support plate and a connecting plate which are vertically arranged and used to be fixed to a support frame, a partition plate or the inner wall of an energy storage box. A downward bent corner is respectively provided at both ends of the support plate in the length direction. The corner is connected to the connecting plate with screws. A locking hole is provided on the end of the connecting plate away from the corner. The locking screw passes through the locking hole to fix the connecting plate to the lithium battery pack.

6. The liquid-cooled energy storage box based on Pareto optimal integration according to claim 1, characterized in that: The lithium battery clusters are arranged in 12 clusters, the lithium battery cells are 314AH, and the battery pack is 52S.

7. The liquid-cooled energy storage box based on Pareto optimal integration according to claim 1, characterized in that: The liquid fire fighting mechanism comprises a water fire fighting connecting pipe which is at least partially parallel to the top of the energy storage box body, and the bottom of the water fire fighting connecting pipe is connected to the water inlet at the bottom of the energy storage box body. The gas fire fighting mechanism comprises a fire fighting gas supply bottle and a gas supply main pipe which is connected thereto and vertically arranged, and a gas supply bracket which is parallel to the top of the energy storage box body is arranged on the top of the gas supply main pipe, and a plurality of gas supply branch pipes are vertically arranged on the gas supply bracket, and each gas supply branch pipe is connected to a plurality of jet pipes from top to bottom.

8. The liquid-cooled energy storage box based on Pareto optimal integration according to claim 1, characterized in that: A plurality of the jet tube arrays are arranged on the gas supply branch pipe, and a jet port is arranged at one end of each jet tube away from the gas supply branch pipe. The jet port is connected to the air inlet on the lithium battery pack to spray the flame-retardant gas into the lithium battery pack.

9. The liquid-cooled energy storage box based on Pareto optimal integration according to claim 1, characterized in that: The liquid-cooling fire-fighting device also includes a liquid-cooling delivery pipeline, on which a plurality of liquid-cooling branches that can be connected to the liquid-cooling inlet on the lithium battery pack are arranged.

10. The liquid-cooled energy storage box based on Pareto optimal integration according to claim 1, characterized in that: It also includes a deflation do not enter module, a fire control box and a sound and light alarm combination located on the same side as the fire gas supply bottle and inside the energy storage box. The deflation do not enter module and the sound and light alarm combination are electrically connected to the fire control box. Electric air inlet shutters, a pressure relief plate and an electric exhaust valve are provided on the side of the energy storage box.

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