High-pressure cascade valve hall type energy storage valve tower cooling system

Abstract

The utility model relates to the technical field of energy storage system cooling, and particularly discloses a high-pressure cascade valve hall type energy storage valve tower cooling system which comprises an energy storage valve tower, a circulating pipeline and a cooling system communicated with the circulating pipeline. A valve tower main water inlet pipe and a valve tower main water return pipe are arranged on one side of the energy storage valve tower; a valve tower main water inlet pipe sequentially flows through a valve tower interlayer pipeline at the top of the energy storage module, an energy storage module inter-column water pipe between the battery modules, a battery module branch pipeline in contact with a first cold plate in the battery modules and an H-bridge branch pipeline in contact with a second cold plate in the H-bridge module, and then is converged into a valve tower main water return pipe; the valve tower main water return pipe is communicated with a water inlet of the liquid cooling unit through a water-air heat exchanger and a cold storage tank in the cooling system in sequence; a water return port of the liquid cooling unit is communicated with the valve tower main water inlet pipe through a second water inlet of the cold storage tank; according to the energy storage system, efficient heat dissipation and stable operation of the energy storage system are achieved through the circulating water path and the cooling system.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage system cooling technical field more specifically relates to a kind of high-pressure cascade valve hall type energy storage valve tower cooling system. BACKGROUND

[0002] With the increasing attention of society to energy security, environmental protection and other issues, energy storage technology has been rapidly developed and widely used. As a new type of energy storage technology, cascade high-pressure energy storage system has good development prospect. Cascade high-pressure energy storage system has the advantages of high efficiency, high reliability, strong scalability, small size, etc., can realize higher energy density and faster charging and discharging speed, and become one of the mainstream of future energy storage technology.

[0003] The main component unit of high-pressure cascade valve hall type energy storage system is energy storage valve tower. Because energy storage valve tower is a multi-layer stacked structure, there are more batteries in a single energy storage valve tower, and a large amount of heat will be released during charging and discharging process, so the thermal power is larger, which brings greater challenge to the temperature control system. At present, the cooling of high-pressure cascade valve hall type energy storage has the following key problems:

[0004] 1) The battery modules in the energy storage valve tower are located at different positions in the energy storage valve tower, which may cause uneven cooling, uneven temperature distribution and large temperature difference between batteries.

[0005] 2) There are more batteries in a single energy storage valve tower, and a large amount of heat will be released during charging and discharging process, so the capacity requirement of temperature control system is larger. The power consumption of temperature control system is one of the key factors affecting the efficiency of energy storage system. The power consumption of temperature control system is larger when refrigerating and heating, which directly affects the operation efficiency of high-pressure cascade energy storage system.

[0006] 3) The battery modules in the high-pressure cascade energy storage valve tower need to be electrically insulated, and all temperature control systems cannot affect the insulation between battery modules and cannot cause discharge risk. UTILITY MODEL CONTENT

[0007] The utility model aims to provide a kind of high-pressure cascade valve hall type energy storage valve tower cooling system, circulating waterway and cooling system are designed for energy storage valve tower, to realize the efficient heat dissipation and stable operation of energy storage system.

[0008] To achieve the above purpose, the utility model provides the following technical scheme:

[0009] A kind of high-pressure cascade valve hall type energy storage valve tower cooling system, comprising: energy storage valve tower, circulating pipeline and cooling system communicated with circulating pipeline;

[0010] The energy storage valve tower is stacked by multiple energy storage modules, each of which comprises multiple battery modules and H-bridge modules; each of the battery modules comprises multiple battery cells and a first cold plate; and each of the H-bridge modules comprises a control conversion device and a second cold plate.

[0011] The circulating pipeline comprises a valve tower main water inlet pipe and a valve tower main water return pipe arranged on one side of the energy storage valve tower; multiple valve tower interlayer pipelines are connected in parallel on the valve tower main water inlet pipe, and each of the valve tower interlayer pipelines is arranged at the top of each energy storage module; multiple energy storage module intercolumn water pipes are connected on each of the valve tower interlayer pipelines, and the energy storage module intercolumn water pipes are arranged at vertical column gaps between adjacent two battery modules or between a battery module and an H-bridge module; the energy storage module intercolumn water pipes branch into multiple battery module branch pipelines or H-bridge branch pipelines; the battery module branch pipelines correspond to the battery modules one by one, and the battery module branch pipelines are in communication with the first cold plates of the corresponding battery modules; the H-bridge branch pipelines correspond to the H-bridge modules one by one, and the H-bridge branch pipelines are in communication with the second cold plates of the corresponding H-bridge modules.

[0012] After the cooling medium in the valve tower main water inlet pipe flows through the multiple valve tower interlayer pipelines, the multiple energy storage module intercolumn water pipes, the multiple battery module branch pipelines and the multiple H-bridge branch pipelines, the cooling medium is gathered into the valve tower main water return pipe.

[0013] The cooling system comprises a liquid cooling unit, a cold storage tank, a water-air heat exchanger and an energy storage valve tower circulating water pump.

[0014] The valve tower main water return pipe is in communication with the water inlet of the liquid cooling unit in sequence through the water inlet of the water-air heat exchanger and the first water inlet of the cold storage tank.

[0015] The water outlet of the liquid cooling unit is in communication with the valve tower main water inlet pipe in sequence through the second water inlet of the cold storage tank and the water inlet of the energy storage valve tower circulating water pump.

[0016] Further, a filter is arranged at the water inlet pipeline between the cold storage tank and the liquid cooling unit.

[0017] Further, a deionization device is arranged at the water return pipeline between the liquid cooling unit and the cold storage tank.

[0018] Further, the valve tower main water inlet pipe extends to the lower region of the cold storage tank; and the water-air heat exchanger and the cold storage tank are arranged in the upper region of the cold storage tank.

[0019] Further, the water inlet pipeline between the cold storage tank and the liquid cooling unit extends to the lower region of the cold storage tank; and the water return pipeline between the liquid cooling unit and the cold storage tank is arranged in the upper region of the cold storage tank.

[0020] Further, the water-air heat exchanger is arranged at the bottom of the energy storage valve tower.

[0021] Further, the top of the valve tower main water inlet pipe and the valve tower main water return pipe is provided with an exhaust valve.

[0022] Further, the bottom of the energy storage valve tower is provided with a supporting insulator.

[0023] Further, the first cold plate and the second cold plate are provided with water cooling circulation pipelines.

[0024] According to the specific embodiments of the utility model, the utility model discloses the following technical effects:

[0025] The utility model discloses a multi-layer energy storage module, and cooling water pipelines are arranged in each module, which can effectively cool the battery module and H bridge module, facilitate uniform heat dissipation, prevent local overheating, prolong battery life, and improve the reliability and stability of the energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only the embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative labor.

[0027] The utility model high pressure cascade valve hall formula energy storage valve tower cooling system will be further described below in combination with the drawings;

[0028] Figure 1 It is the energy storage valve tower structure schematic diagram in the high pressure cascade valve hall formula energy storage valve tower cooling system provided by the utility model;

[0029] Figure 2 It is the cooling system schematic diagram in the high pressure cascade valve hall formula energy storage valve tower provided by the utility model.

[0030] In the figure: 1, energy storage valve tower; 2, energy storage module; 3, battery module; 4, H bridge module; 5, support insulator; 6, liquid cooling unit; 7, cold storage tank; 8, water-air heat exchanger; 9, valve tower main water inlet pipe; 10, valve tower main water return pipe; 11, valve tower interlayer water inlet pipe; 12, valve tower interlayer water return pipe; 13, energy storage module column interlayer water inlet pipe; 14, energy storage module column interlayer water return pipe; 15, battery module water inlet branch pipe; 16, battery module water return branch pipe; 17, energy storage valve tower circulating water pump; 18, deionization device; 19, filter; 20, liquid cooling unit and cold storage tank interlayer water return pipe; 21, cold storage tank and liquid cooling unit interlayer water inlet pipe; 22, water-air heat exchanger and cold storage tank interlayer pipe; 23, H bridge water return branch pipe; 24, H bridge water inlet branch pipe; 25, exhaust valve. DETAILED DESCRIPTION

[0031] The specific embodiments of the utility model are described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but are not used to limit the scope of the utility model.

[0032] In order to better understand the purpose, structure and function of the utility model, the utility model is described in further detail below in combination with the drawings.

[0033] The utility model provides a kind of high-pressure cascade valve hall type energy storage valve tower cooling system, comprising: energy storage valve tower 1, circulating pipeline and the cooling system being communicated with circulating pipeline;

[0034] As shown in Figure 1 The energy storage valve tower 1 is stacked by multiple energy storage modules 2, and each energy storage module 2 includes multiple battery modules 3 and H bridge modules 4;Each battery module 3 includes multiple battery cells and first cold plates;Each H bridge module 4 includes control conversion device and second cold plate;

[0035] The circulating pipeline includes: valve tower main water inlet pipe 9 and valve tower main water return pipe 10 arranged on one side of the energy storage valve tower 1;Multiple valve tower interlayer pipelines are connected in parallel on the valve tower main water inlet pipe 9, and each valve tower interlayer pipeline is arranged at the top of each energy storage module 2;Multiple energy storage module column interlayer water pipes are connected to each valve tower interlayer pipeline, and the energy storage module column interlayer water pipes are arranged at the vertical column gap between adjacent two battery modules 3 or between the battery module 3 and the H bridge module 4;The energy storage module column interlayer water pipes branch into multiple battery module branch pipes or H bridge branch pipes;The battery module branch pipes correspond to the battery modules 3 one by one, and the battery module branch pipes are communicated with the first cold plates of the corresponding battery modules 3;The H bridge branch pipes correspond to the H bridge modules 4 one by one, and the H bridge branch pipes are communicated with the second cold plates of the corresponding H bridge modules 4;

[0036] The cooling medium in the valve tower main water inlet pipe 9 flows through a plurality of valve tower interlayer pipes, a plurality of energy storage module intercolumn water pipes, a plurality of battery module branch pipes and a plurality of H-bridge branch pipes, and then converges to the valve tower main water return pipe 10.

[0037] In the scheme, the energy storage valve tower 1 is stacked by a plurality of energy storage modules 2 into a multi-layer tower structure, each energy storage module 2 is composed of a plurality of battery modules 3 and an H-bridge module 4, each battery module 3 internally integrates a plurality of battery cells and a first cold plate, i.e. a battery cell cold plate; each H-bridge module 4 internally integrates a power conversion device and a second cold plate, i.e. an H-bridge cold plate. During the charging and discharging process of the high-voltage cascaded energy storage system, a large amount of heat will be generated by the battery cells in the battery module 3 and the power conversion device in the H-bridge module 4.

[0038] Since the energy storage valve tower 1 in the embodiment adopts a multi-layer tower structure, each battery module 3 and H-bridge module 4 is located at a different position of the energy storage valve tower 1. In order to make the heat dissipation of each battery module 3 in the energy storage valve tower 1 uniform, the utility model adopts a multi-level parallel distribution pipeline, the main water pipe of the energy storage valve tower 1 is vertically placed on the side of the energy storage valve tower, and the exhaust valve 25 arranged at the highest point of the top is used to exhaust the gas inside the pipeline. The valve tower interlayer pipe is branched from the main water pipe of the energy storage valve tower 1 and is located at the top of the energy storage module 2. The water paths of the valve tower interlayer pipes between the multi-layer energy storage modules 2 are connected in parallel. The energy storage module intercolumn water pipe is branched from the valve tower interlayer pipe, and the water paths of each energy storage module intercolumn water pipe are connected in parallel. The battery module branch pipe is branched from the energy storage module intercolumn water pipe, and the water paths of each battery module branch pipe are connected in parallel. Each water pipe is arranged in parallel in two kinds of one-in-one-out. Therefore, the main water pipe of the energy storage valve tower 1 includes the valve tower main water inlet pipe 9 and the valve tower main water return pipe 10. The valve tower interlayer pipe includes the valve tower interlayer water inlet pipe 11 and the valve tower interlayer water return pipe 12. The energy storage module intercolumn water pipe includes the energy storage module intercolumn water inlet pipe 13 and the energy storage module intercolumn water return pipe 14. The battery module branch pipe includes the battery module water inlet branch pipe 15 and the battery module water return branch pipe 16. The H-bridge branch pipe includes the H-bridge water inlet branch pipe 24 and the H-bridge water return branch pipe 23. The valve tower main water inlet pipe 9 passes through the valve tower interlayer water inlet pipe 11, the energy storage module intercolumn water inlet pipe 13, the H-bridge water inlet branch pipe 24 and the battery module water inlet branch pipe 15 in the flow process, and finally converges to the valve tower main water return pipe 10 through the valve tower interlayer water return pipe 12, the energy storage module intercolumn water return pipe 14, the H-bridge water return branch pipe 23 and the battery module water return branch pipe 16, respectively. Thus, a complete water inlet and water outlet circulation water path is formed inside the energy storage valve tower 1, the water paths of each energy storage module 2 in the energy storage valve tower 1 are connected in parallel, the water paths of each battery module 3 in the energy storage module 2 are connected in parallel, and the cooling medium is distributed through the above multi-level parallel water paths. The flow distribution of each battery module 3 can be uniform, so that the heat dissipation of each battery module 3 in the energy storage valve tower 1 is uniform.

[0039] AsFigure 2 As shown, the cooling system comprises a liquid cooling unit 6, a cold storage tank 7, a water-air heat exchanger 8 and an energy storage valve tower circulating water pump 17;

[0040] The valve tower main water return pipe 10 is in communication with the water inlet of the water-air heat exchanger 8, the first water inlet of the cold storage tank 7 and the water inlet of the liquid cooling unit 6 in sequence;

[0041] The water outlet of the liquid cooling unit 6 is in communication with the second water inlet of the cold storage tank 7, the water inlet of the energy storage valve tower circulating water pump 17 and the valve tower main water inlet pipe 9 in sequence.

[0042] The flow process of the cooling system is as follows: after the first water return pipe of the cold storage tank 7 is in communication with the water inlet of the energy storage valve tower circulating water pump 17, the water return pipe of the energy storage valve tower circulating water pump 17 is in communication with multiple valve tower interlayer pipes, multiple energy storage module intercolumn water pipes, multiple battery module branch pipes and multiple H-bridge branch pipes, and then converges to the valve tower main water return pipe 10, which is in communication with the water inlet pipe of the water-air heat exchanger 8.

[0043] The water return pipe of the water-air heat exchanger 8 is in communication with the first water inlet pipe of the cold storage tank 7; the first water return pipe of the cold storage tank 7 is in communication with the water inlet pipe of the liquid cooling unit 6;

[0044] The water return pipe of the liquid cooling unit 6 is in communication with the second water inlet pipe of the cold storage tank 7.

[0045] A filter 19 is arranged at the water inlet pipe between the cold storage tank and the liquid cooling unit.

[0046] A deionization device 18 is arranged at the water return pipe between the liquid cooling unit and the cold storage tank.

[0047] The valve tower main water inlet pipe 9 extends to the lower region of the cold storage tank 7; the water-air heat exchanger and cold storage tank interpipe 22 is arranged in the upper region of the cold storage tank 7;

[0048] The water inlet pipe between the cold storage tank and the liquid cooling unit 21 extends to the lower region of the cold storage tank 7; the water return pipe between the liquid cooling unit and the cold storage tank 20 is arranged in the upper region of the cold storage tank 7;

[0049] The water-air heat exchanger 8 is located at the bottom of the energy storage valve tower 1;

[0050] An exhaust valve 25 is arranged at the top of the valve tower main water inlet pipe 9 and the valve tower main water return pipe 10;

[0051] A support insulator 5 is arranged at the bottom of the energy storage valve tower 1;

[0052] Water cooling circulation pipes are arranged in the first cold plate and the second cold plate.

[0053] In this scheme, since the high-voltage cascade energy storage system is intermittent charging and discharging, that is, charging and discharging at fixed time every day, and stopping working at other time without heat, and the heat loss during charging and discharging changes greatly, generally at the end of charging and discharging, the heat loss is the largest, the liquid cooling unit 6 providing temperature control for the energy storage system has large power consumption in refrigeration and heating modes, and the efficiency of the liquid cooling unit 6 is greatly affected by the external environment temperature, the higher the external environment temperature, the lower the refrigeration efficiency of the liquid cooling unit 6, and the lower the external environment temperature, the higher the refrigeration efficiency of the liquid cooling unit 6. Therefore, based on the characteristics of intermittent working of the energy storage system and great influence of the liquid cooling unit 6 on the external environment temperature, a cold storage tank 7 is arranged underground, the cold storage tank 7 is made of multi-layer thermal insulation material with low thermal conductivity, which can effectively isolate the heat exchange between the cold storage tank 7 and the external environment; the cold storage tank 7 is in a tank structure, and the cold storage tank 7 and the main inlet and return water pipes of the energy storage valve tower 1 are communicated. Among them, the inlet and return water pipes of the liquid cooling unit 6 are communicated with the cold storage tank 7, the water inlet pipe of the liquid cooling unit 6 extends into the lower part of the tank body, and the main return water pipe of the liquid cooling unit 6 extends into the upper part of the tank body.

[0054] In this embodiment, since the liquid cooling medium has the characteristics of high heat transfer coefficient, large specific heat capacity and fast cooling speed, the compressor is started to refrigerate when the environment is low at night, so that the cooling medium in the cold storage tank 7 is in the allowable low temperature range, when the energy storage valve tower 1 works, the low temperature cooling medium in the cold storage tank 7 is preferentially used for refrigeration, when the cooling medium in the cold storage tank 7 is heated to the allowable range, the external liquid cooling unit 6 is started to refrigerate simultaneously, the temperature of the cooling medium in the cold storage tank 7 is reduced, and the cooling medium in the cold storage tank 7 is always in the safe temperature range.

[0055] When the temperature is low in winter, the internal environment of the high-voltage cascade valve hall needs to be heated by the air conditioner to ensure that the external temperature of the energy storage valve tower 1 is in the appropriate range, and the water-air heat exchanger 8 is connected in series between the main return water pipe 10 of the valve tower and the cold storage tank 7. The water-air heat exchanger 8 is located below the energy storage valve tower 1. When the internal air temperature of the high-voltage cascade valve hall is low in winter, the fan of the water-air heat exchanger 8 starts to work, and the cooling medium absorbing heat of the energy storage system is exchanged to the internal environment space of the high-voltage cascade valve hall through water-air exchange, thereby reducing the working time and power consumption of the external air conditioning system and the liquid cooling unit 6, and effectively improving the efficiency of the energy storage system.

[0056] Therefore, the high-pressure cascade valve hall type energy storage valve tower in the scheme adopts liquid cooling heat dissipation, and the external liquid cooling unit 6 provides the cooling medium after refrigeration to the cold plate of each battery module 3 and H-bridge module through the pipeline circulation, takes away the heat, and returns to the liquid cooling unit 6 for refrigeration, to form an internally closed cooling circulation. The liquid cooling unit 6 has heating and refrigeration functions, and when the temperature is low, the heating function is started, and when the temperature is high, the refrigeration function is started, so that the battery cell and the power control conversion device can operate in a safe and stable temperature range.

[0057] In the scheme, all pipelines and exhaust valves inside the energy storage valve tower are processed by using high insulation materials such as PVDF, PPH and PP, and a deionization device 18 is connected in series on the backwater pipeline 20 between the liquid cooling unit 6 and the cold storage tank 7. The cooling medium after purification treatment of the deionization device 18 has extremely low conductivity, and a filter 19 is connected in series on the water inlet pipeline 21 between the cold storage tank and the liquid cooling unit, so as to avoid that impurities entering the cold storage tank 7 will affect the conductivity and heat dissipation effect. Since the cooling pipeline and the cooling medium inside the energy storage valve tower 1 are insulated, the electrical operation safety of the high-pressure cascade energy storage valve tower will not be affected, and the water cooling system will not cause discharge risk.

[0058] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high pressure cascaded valve hall type energy storage valve tower cooling system, characterized by, The energy storage valve tower (1), a circulating pipeline, and a cooling system in communication with the circulating pipeline are included. The energy storage valve tower (1) is stacked by multiple energy storage modules (2), each of which includes multiple battery modules (3) and H-bridge modules (4); each battery module (3) includes multiple battery cells and a first cold plate; and each H-bridge module (4) includes a control conversion device and a second cold plate. The circulating pipeline includes a main water inlet pipe (9) and a main water return pipe (10) of the valve tower arranged on one side of the energy storage valve tower (1); multiple interlayer pipes are arranged in parallel on the main water inlet pipe (9) of the valve tower, and each interlayer pipe is arranged at the top of each energy storage module (2); multiple energy storage module inter-column water pipes are connected to each interlayer pipe, and the energy storage module inter-column water pipes are arranged in the vertical column gap between adjacent two battery modules (3) or between the battery module (3) and the H-bridge module (4); the energy storage module inter-column water pipes branch out into multiple battery module branch pipes or H-bridge branch pipes; the battery module branch pipes correspond to the battery modules (3) one by one, and the battery module branch pipes are in communication with the first cold plates of the corresponding battery modules (3); the H-bridge branch pipes correspond to the H-bridge modules (4) one by one, and the H-bridge branch pipes are in communication with the second cold plates of the corresponding H-bridge modules (4). The cooling medium in the main water inlet pipe (9) of the valve tower flows through multiple interlayer pipes, multiple energy storage module inter-column water pipes, multiple battery module branch pipes, and multiple H-bridge branch pipes, and then converges into the main water return pipe (10) of the valve tower. The cooling system includes a liquid cooling unit (6), a cold storage tank (7), a water-air heat exchanger (8), and an energy storage valve tower circulating water pump (17). The main water return pipe (10) of the valve tower sequentially passes through the water inlet of the water-air heat exchanger (8), the first water inlet of the cold storage tank (7), and the water inlet of the liquid cooling unit (6). The water outlet of the liquid cooling unit (6) sequentially passes through the second water inlet of the cold storage tank (7), the water inlet of the energy storage valve tower circulating water pump (17), and the main water inlet pipe (9) of the valve tower. A filter (19) is arranged at the water inlet pipe (21) between the cold storage tank and the liquid cooling unit.

2. The high pressure cascade valve hall type energy storage valve tower cooling system according to claim 1, characterized in that, A deionization device (18) is arranged at the water return pipe (20) between the liquid cooling unit and the cold storage tank.

3. The high pressure cascade valve hall type energy storage valve tower cooling system according to claim 1, characterized in that, The main water inlet pipe (9) of the valve tower extends to the lower region of the cold storage tank (7); and the water-air heat exchanger and the cold storage tank inter-pipeline (22) are arranged in the upper region of the cold storage tank (7).

4. The high pressure cascade valve hall type energy storage valve tower cooling system of claim 1, wherein, The water inlet pipe (21) between the cold storage tank and the liquid cooling unit extends to the lower region of the cold storage tank (7); and the water return pipe (20) between the liquid cooling unit and the cold storage tank is arranged in the upper region of the cold storage tank (7).

5. The high pressure cascade valve hall type energy storage valve tower cooling system of claim 1, wherein, The water-air heat exchanger (8) is arranged at the bottom of the energy storage valve tower (1).

6. The high pressure cascade valve hall type energy storage valve tower cooling system of claim 1, wherein, An exhaust valve (25) is arranged at the top of the main water inlet pipe (9) and the main water return pipe (10) of the valve tower.

7. The high pressure cascade valve hall type energy storage valve tower cooling system of claim 1, wherein, A support insulator (5) is arranged at the bottom of the energy storage valve tower (1).

8. The high pressure cascade valve hall type energy storage valve tower cooling system of claim 1, wherein, Water cooling circulation pipelines are arranged in the first cold plate and the second cold plate.

9. The high pressure cascade valve hall type energy storage valve tower cooling system of claim 1, wherein, ​

Images