Energy storage unit cooling system and energy storage power station

Abstract

The utility model provides an energy storage unit cooling system and an energy storage power station, including a liquid supply main pipe, a liquid supply riser, a liquid supply branch pipe, a liquid return main pipe, a liquid return riser and a liquid return branch pipe. There are two liquid supply main pipes, which are respectively located on both sides of the energy storage unit. There are several liquid supply risers, which are respectively connected to the top of the liquid supply main pipe. The liquid supply branch pipes are connected between the liquid supply branch pipes and the battery cold plate. Each liquid supply riser is connected to several liquid supply branches. There are two liquid return main pipes, which are respectively located on both sides of the energy storage unit. There are several liquid return risers, which are respectively connected to the top of the liquid return main pipe. The liquid return branch pipes are connected between the liquid return branch pipes and the battery cold plate. The energy storage unit cooling system provided by the utility model utilizes components such as a liquid supply pipeline main pipe, a liquid supply riser and a liquid supply branch pipe to form a large-scale liquid supply and liquid return pipeline, which is convenient for timely taking away the heat generated by the battery during charging or discharging, thereby extending the service life of the battery.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage battery cooling, and more specifically, relates to an energy storage unit cooling system and an energy storage power station. Background Art

[0002] In the new energy industry, energy storage power stations are mainly used to store electrical energy, and play a role in power grid connection, peak shaving and valley filling. Energy storage power stations include many different types of batteries, and their number will vary depending on the scale and power requirements of the power station. At present, energy storage units are formed by multiple batteries in energy storage power stations. Common battery types include lithium-ion batteries, lithium nickel cobalt manganese oxide batteries, and lithium gallium iron phosphate batteries. During the use of energy storage power stations, the batteries will generate heat in real time. As the heat accumulates, it is easy to increase the energy loss of the battery, reduce the economy of the power station, and even cause explosions in severe cases.

[0003] At present, energy storage power stations generally use two cooling methods. One is air cooling, which uses a cold air blower to deliver cold air to the energy storage power station for cooling. The other is liquid cooling, which uses a battery cold plate to supply coolant to cool the battery. The above liquid cooling method requires a coolant delivery pipeline for each battery, resulting in a large overall structure space occupation, and also makes subsequent maintenance and repair very inconvenient. Utility Model Content

[0004] The utility model aims to provide an energy storage unit cooling system and an energy storage power station, which can synchronously supply cooling liquid to multiple battery cold plates, realize spatial isolation layout, and improve the cooling efficiency of the battery.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide an energy storage unit cooling system, including a liquid supply main pipe, a liquid supply riser, a liquid supply branch pipe, a liquid return main pipe, a liquid return riser and a liquid return branch pipe, two liquid supply main pipes are provided, and the two liquid supply main pipes are respectively located on both sides of the energy storage unit, a plurality of liquid supply risers are provided, and are respectively connected to the top of the liquid supply main pipe in the up-down direction, the liquid supply branch pipe is connected between the liquid supply branch pipe and the battery cold plate, and each liquid supply riser is connected to a plurality of liquid supply branch pipes;

[0006] There are two liquid return main pipes, which are located on both sides of the energy storage unit respectively. There are several liquid return risers, which are connected to the top of the liquid return main pipes in the up and down directions respectively. The liquid return branch pipes are connected between the liquid return branch pipes and the battery cold plate. Each liquid return riser is connected to several liquid return branch pipes.

[0007] In one possible implementation, the ends of the two liquid supply main pipes are connected by a first connecting pipe, and a second connecting pipe connected to the water outlet end of the liquid cooling unit is provided in the middle of the first connecting pipe; the ends of the two liquid return main pipes are connected by a third connecting pipe, and the third connecting pipe is connected to the return end of the liquid cooling unit through a fourth connecting pipe.

[0008] In a possible implementation, a switch valve is provided at the lower end of the liquid supply riser and the lower end of the liquid return riser, and an exhaust valve is provided at the upper end of the liquid return riser.

[0009] In some embodiments, a main drain valve is provided at the outer end of the liquid supply main pipe, and the main drain valve is used to discharge the coolant in the liquid supply main pipe.

[0010] In some embodiments, the lower ends of the liquid supply riser and the liquid return riser are provided with avoidance pipes extending outward to avoid the battery cold plate, and the avoidance pipes are provided with drain connecting valves, and the drain connecting valves have drain nozzles, which are used to be connected to external pipes to discharge the coolant in the liquid supply riser or the liquid return riser.

[0011] In a possible implementation, a first drainage portion extending obliquely downwardly from the battery cold plate is provided on the liquid supply branch pipe, and the first drainage portion is used to drain the coolant into the battery cold plate.

[0012] In some embodiments, the liquid return branch pipe is provided with a second drainage portion extending obliquely upwardly on one side of the liquid return branch pipe, and the second drainage portion is used to drain the coolant upwardly and condense the gas and make it suspended above the coolant.

[0013] In a possible implementation, a plurality of connecting pipe clamps are sleeved on the liquid supply riser and the liquid return riser, and the connecting pipe clamps can be connected to the inner wall of the box body of the energy storage unit to limit the position of the liquid supply riser.

[0014] In a possible implementation, an insulation layer is provided on the outer peripheral wall of the liquid supply main pipe, the liquid supply riser and the liquid supply branch pipe, and the insulation layer is a foam material component.

[0015] Compared with the prior art, the solution shown in the embodiment of the present application utilizes a liquid supply pipeline main pipe, a liquid supply riser and a liquid supply branch pipe to form a large-scale liquid supply pipeline, and utilizes a liquid return main pipe, a liquid return riser and a liquid return branch pipe to form a large-scale liquid return pipeline, thereby transporting cooling liquid to the battery cold plate of each battery, facilitating timely removal of heat generated by the battery during charging or discharging, achieving reasonable spatial layout, extending the service life of the battery, and also facilitating subsequent maintenance and overhaul.

[0016] The utility model also provides an energy storage power station, which includes an energy storage unit, a liquid cooling unit and an energy storage unit cooling system. The energy storage battery uses the liquid cooling unit to supply coolant to the energy storage unit cooling system, and receives the coolant refluxed from the energy storage unit cooling system, together forming a large-scale liquid supply pipeline and a liquid return pipeline, so as to transport the coolant to each battery cold plate, so as to timely take away the heat generated by the battery during the charging or discharging process, realize the reasonable layout of the space, extend the service life of the battery, and also facilitate subsequent maintenance and overhaul. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of the energy storage unit cooling system provided by an embodiment of the utility model;

[0019] Figure 2 For the utility model embodiment Figure 1 The partially enlarged structural diagram of middle Ⅰ;

[0020] Figure 3 For the utility model embodiment Figure 1 A schematic diagram of the partially enlarged structure of the cooling system of the energy storage unit from another angle.

[0021] Among them, the reference numerals in the figure are:

[0022] 1. Liquid supply main pipe; 11. First connecting pipe; 12. Second connecting pipe; 13. Liquid discharge main valve; 2. Liquid supply riser; 21. Avoidance pipe; 22. Liquid discharge connecting valve; 23. Liquid discharge nozzle; 24. Connecting pipe clamp; 25. Switch valve; 3. Liquid supply branch pipe; 31. First drainage part; 4. Liquid return main pipe; 41. Third connecting pipe; 42. Fourth connecting pipe; 5. Liquid return riser; 51. Exhaust valve; 6. Liquid return branch pipe; 61. Second drainage part. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0025] Please also read Figures 1 to 3 , the energy storage unit cooling system and energy storage power station provided by the utility model are now described. The energy storage unit cooling system includes a liquid supply main pipe 1, a liquid supply riser 2, a liquid supply branch pipe 3, a liquid return main pipe 4, a liquid return riser 5 and a liquid return branch pipe 6. Two liquid supply main pipes 1 are provided, and the two liquid supply main pipes 1 are respectively located on both sides of the energy storage unit. A plurality of liquid supply risers 2 are provided, and are respectively connected to the top of the liquid supply main pipe 1 in the up-down direction. The liquid supply branch pipe 3 is connected between the liquid supply branch pipe 3 and the battery cold plate, and each liquid supply riser 2 is connected to a plurality of liquid supply branch pipes 3;

[0026] There are two liquid return main pipes 4, which are respectively located on both sides of the energy storage unit. There are several liquid return risers 5, which are respectively connected to the top of the liquid return main pipe 4 in the up and down directions. The liquid return branch pipe 6 is connected between the liquid return branch pipe 6 and the battery cold plate, and each liquid return riser 5 is connected to several liquid return branch pipes 6.

[0027] Compared with the prior art, the energy storage unit cooling system provided in this embodiment uses a liquid supply pipeline main pipe, a liquid supply riser 2 and a liquid supply branch pipe 3 to form a large-scale liquid supply pipeline, and uses a liquid return main pipe 4, a liquid return riser 5 and a liquid return branch pipe 6 to form a large-scale liquid return pipeline, so as to transport cooling liquid to the battery cold plate of each battery, so as to timely take away the heat generated by the battery during the charging or discharging process, realize the reasonable layout of the space, extend the service life of the battery, and also facilitate subsequent maintenance and overhaul.

[0028] In this embodiment, the energy storage unit includes multiple groups of batteries arranged in a matrix, and the multiple groups of batteries are provided with two rows and multiple columns. The two liquid supply main pipes 1 are respectively located outside the two rows of batteries, and the multiple liquid supply risers 2 on each liquid supply main pipe 1 correspond one-to-one to the multiple columns of batteries in the same row of batteries. Similarly, the multiple liquid return risers 5 on each liquid return main pipe 4 also correspond one-to-one to the multiple columns of batteries in the same row of batteries. The liquid return main pipe 4 is arranged in parallel with the liquid supply main pipe 1, and can be arranged on the side of the liquid supply main pipe 1 close to the battery, or on the side of the liquid supply main pipe 1 away from the battery.

[0029] Each battery group includes multiple batteries arranged in the up-down direction. The multiple liquid supply branches 3 on the same liquid supply riser 2 can correspond one-to-one to the multiple batteries in each group. Similarly, the multiple liquid return branches 6 on the same liquid return riser 5 can correspond one-to-one to the multiple batteries in each group.

[0030] In one possible implementation, see Figures 1 to 3 The ends of the two liquid supply main pipes 1 are connected through a first connecting pipe 11, and a second connecting pipe 12 connected to the water outlet end of the liquid cooling unit is provided in the middle of the first connecting pipe 11; the ends of the two liquid return main pipes 4 are connected through a third connecting pipe 41, and the third connecting pipe 41 is connected to the water return end of the liquid cooling unit through a fourth connecting pipe 42.

[0031] In this embodiment, the two liquid supply main pipes 1 are connected by a first connecting pipe 11, so that low-temperature coolant can be synchronously supplied to the two liquid supply main pipes 1 with the help of a second connecting pipe 12. The second connecting pipe 12 is connected to the liquid outlet end of the liquid cooling unit to ensure synchronous and stable supply of coolant in the two liquid supply main pipes 1 on both sides.

[0032] Similarly, the two liquid return main pipes 4 are connected by the third connecting pipe 41, so that the coolant returning from the two liquid return main pipes 4 can be synchronously sent to the cooling unit with the help of the fourth connecting pipe 42, so that the coolant is cooled in the cooling unit and then sent to the two liquid supply main pipes 1 through the second connecting pipe 12 and the first connecting pipe 11 for use, thereby ensuring the orderly transportation of the coolant and reducing the space occupied.

[0033] In one possible implementation, see Figures 1 to 3 The lower end of the liquid supply riser 2 and the lower end of the liquid return riser 5 are both provided with a switch valve 25, and the upper end of the liquid return riser 5 is provided with an exhaust valve 51. The setting of the switch valve 25 facilitates real-time control of the on-off status of the liquid supply riser 2 and the liquid return riser 5, and improves the convenience during maintenance and overhaul. By disconnecting the switch valve 25 on the liquid supply riser 2, the upper liquid supply riser 2 and the liquid supply branch pipe 3 can be disconnected from the liquid supply main pipe 1, avoiding the tediousness of emptying the liquid supply main pipe 1 and avoiding the waste of coolant. Similarly, by disconnecting the switch valve 25 on the liquid return branch pipe 6, the liquid return main pipe 4 and the liquid return riser 5 can also be effectively isolated, and the same effect can be achieved.

[0034] The exhaust valve 51 disposed at the upper end of the liquid return riser 5 can discharge the gas in the coolant in an orderly manner, thereby preventing the presence of too much gas in the coolant from affecting the cooling effect of the battery, thereby ensuring effective cooling of the battery.

[0035] For some examples, see Figures 1 to 3 The outer end of the liquid supply main pipe 1 is provided with a drain main valve 13, which is used to discharge the coolant in the liquid supply main pipe 1. When the liquid supply main pipe 1 components need to be repaired, the switch valve 25 on the liquid supply riser 2 can be closed first, and then the coolant in the liquid supply main pipe 1 can be discharged, so as to achieve maintenance and repair of the relevant settings, avoid the tediousness caused by emptying the coolant in the overall pipeline, and also avoid the waste of coolant. The drain main valve 13 on the return liquid main pipe 4 has the same effect, which will not be repeated here.

[0036] For some examples, see Figures 1 to 3 The lower ends of the liquid supply riser 2 and the liquid return riser 5 are provided with an avoidance pipe 21 extending outward to avoid the battery cold plate. The avoidance pipe 21 is provided with a drain connecting valve 22. The drain connecting valve 22 has a drain nozzle 23. The drain nozzle 23 is used to be connected to an external pipeline to discharge the coolant in the liquid supply riser 2 or the liquid return riser 5.

[0037] In this embodiment, in view of the position of the battery and the battery cold plate, an escape pipe 21 is set at the lower end of the liquid supply riser 2 and the liquid return riser 5. The escape pipe 21 extends in the horizontal direction. Different forms such as straight pipes or right-angle bend pipes can be selected according to the escape space requirements. The setting of the drain connecting valve 22 is convenient for discharging the coolant in the liquid supply riser 2. First, close the switch valve 25, and then connect the drain nozzle 23 of the drain connecting valve 22 to the external pipeline, so that the liquid supply riser 2 can be easily emptied to achieve the purpose of inspection or maintenance. The drain connecting valve 22 on the liquid return riser 5 has the same effect, which will not be repeated here.

[0038] In one possible implementation, see Figures 1 to 3 The liquid supply branch pipe 3 is provided with a first drainage portion 31 extending downwardly to one side of the battery cold plate, and the first drainage portion 31 is used to drain the coolant into the battery cold plate. By providing the first drainage portion 31 on the liquid supply branch pipe 3, the coolant can flow smoothly into the battery cold plate under the action of gravity, thereby improving the fluidity of liquid transportation and ensuring the stability of transportation.

[0039] For some examples, see Figures 1 to 3The liquid return branch pipe 6 is provided with a second drainage portion 61 extending obliquely upward on one side of the liquid return branch pipe 6. The second drainage portion 61 is used to drain the coolant upward and condense the gas and make it suspended above the coolant. The second drainage portion 61 provided on the liquid return branch pipe 6 is used to send the used coolant to the liquid return branch pipe 6. Since the exhaust valve 51 is provided on the top of the liquid return branch pipe 6, in order to effectively gather the gas in the pipeline, the second drainage portion 61 is used to effectively gather the small bubbles in the coolant when the pipeline direction changes, forming larger bubbles, which are convenient for floating on the coolant surface when entering the liquid return riser 5, and are discharged in an orderly manner through the exhaust valve 51, thereby ensuring the purity of the subsequent coolant and improving the cooling effect of the coolant.

[0040] In one possible implementation, see Figures 1 to 3 A plurality of connecting pipe clamps 24 are sleeved on the liquid supply riser 2 and the liquid return riser 5 , and the connecting pipe clamps 24 can be connected to the inner wall of the box body of the energy storage unit to limit the liquid supply riser 2 .

[0041] In this embodiment, since the liquid supply riser 2 and the liquid return riser 5 extend upwards respectively, a spatial three-dimensional pipeline structure is formed. In order to ensure the stability of the positions of the two, connecting pipe clamps 24 are respectively provided at different circumferential positions of the liquid supply riser 2 and the liquid return riser 5. The connecting pipe clamp 24 can be connected to the inner wall of the box of the energy storage unit, and plays a role in fixing the liquid supply riser 2 and the liquid return riser 5, so as to prevent the two from tipping over and tilting to affect the stable operation of the equipment.

[0042] In one possible implementation, see Figures 1 to 3 The outer walls of the liquid supply main pipe 1, the liquid supply riser 2 and the liquid supply branch pipe 3 are all provided with a heat preservation layer, which is a foam material component. By providing the heat preservation layer on the above-mentioned pipe body, a good heat preservation and heat insulation effect is achieved to ensure the cooling effect of the coolant on the battery.

[0043] Based on the same inventive concept, the embodiment of the present application also provides an energy storage power station, which includes an energy storage unit, a liquid cooling unit, and an energy storage unit cooling system. The above energy storage battery uses the liquid cooling unit to supply coolant to the energy storage unit cooling system, and receives the coolant refluxed from the energy storage unit cooling system, together forming a large-scale liquid supply pipeline and a liquid return pipeline, so as to transport coolant to each battery cold plate, so as to timely remove the heat generated by the battery during charging or discharging, realize the reasonable layout of the space, extend the service life of the battery, and also facilitate subsequent maintenance and repair.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Energy storage unit cooling system, characterized in that: It comprises a liquid supply main pipe (1), a liquid supply riser (2), a liquid supply branch pipe (3), a liquid return main pipe (4), a liquid return riser (5) and a liquid return branch pipe (6), wherein two liquid supply main pipes (1) are provided, and the two liquid supply main pipes (1) are respectively located on both sides of the energy storage unit, a plurality of liquid supply risers (2) are provided, and are respectively connected to the top of the liquid supply main pipe (1) in the up-down direction, the liquid supply branch pipe (3) is connected between the liquid supply branch pipe (3) and the battery cold plate, and each of the liquid supply risers (2) is connected to a plurality of the liquid supply branch pipes (3); Two liquid return main pipes (4) are provided, and the two liquid return main pipes (4) are respectively located on both sides of the energy storage unit. A plurality of liquid return riser pipes (5) are provided, and are respectively connected to the top of the liquid return main pipe (4) in the up-down direction. The liquid return branch pipe (6) is connected between the liquid return branch pipe (6) and the battery cold plate, and each of the liquid return riser pipes (5) is connected to a plurality of the liquid return branch pipes (6).

2. The energy storage unit cooling system according to claim 1, characterized in that: The ends of the two liquid supply main pipes (1) are connected via a first connecting pipe (11), and a second connecting pipe (12) connected to a water outlet of the liquid cooling unit is provided in the middle of the first connecting pipe (11); the ends of the two liquid return main pipes (4) are connected via a third connecting pipe (41), and the third connecting pipe (41) is connected to a water return end of the liquid cooling unit via a fourth connecting pipe (42).

3. The energy storage unit cooling system according to claim 1, characterized in that: The lower ends of the liquid supply riser (2) and the liquid return riser (5) are both provided with switch valves (25), and the upper end of the liquid return riser (5) is provided with an exhaust valve (51).

4. The energy storage unit cooling system according to claim 3, characterized in that: The outer end of the liquid supply main pipe (1) is provided with a liquid discharge main valve (13), and the liquid discharge main valve (13) is used to discharge the coolant in the liquid supply main pipe (1).

5. The energy storage unit cooling system according to claim 4, characterized in that: The lower ends of the liquid supply riser (2) and the liquid return riser (5) are provided with a bypass pipe (21) extending outward to bypass the battery cold plate, and the bypass pipe (21) is provided with a liquid discharge connecting valve (22), and the liquid discharge connecting valve (22) has a liquid discharge nozzle (23), and the liquid discharge nozzle (23) is used to be connected to an external pipeline to discharge the coolant in the liquid supply riser (2) or the liquid return riser (5).

6. The energy storage unit cooling system according to any one of claims 1 to 5, characterized in that: The liquid supply branch pipe (3) is provided with a first drainage portion (31) extending downwardly toward the battery cold plate, and the first drainage portion (31) is used to drain the cooling liquid into the battery cold plate.

7. The energy storage unit cooling system according to claim 6, characterized in that: The liquid return branch pipe (6) is provided with a second drainage portion (61) extending obliquely upwardly from one side of the liquid return branch pipe (6), and the second drainage portion (61) is used to drain the cooling liquid upwardly and condense the gas so that it is suspended above the cooling liquid.

8. The energy storage unit cooling system according to any one of claims 1 to 5, characterized in that: A plurality of connecting pipe clamps (24) are sleeved on the liquid supply riser (2) and the liquid return riser (5), and the connecting pipe clamps (24) can be connected to the inner wall of the box of the energy storage unit to limit the position of the liquid supply riser (2).

9. The energy storage unit cooling system according to any one of claims 1 to 5, characterized in that: The outer peripheral walls of the liquid supply main pipe (1), the liquid supply riser (2) and the liquid supply branch pipe (3) are all provided with a heat-insulating layer, and the heat-insulating layer is a foam material component.

10. An energy storage power station, characterized in that: It comprises an energy storage unit, a liquid cooling unit and the energy storage unit cooling system according to any one of claims 1 to 9.

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