Centralized battery energy storage liquid cooling and heating management system
The centralized battery energy storage liquid cooling thermal management system solves the problems of difficult fault repair, high maintenance costs, high energy consumption, and large space occupation of distributed liquid cooling systems in battery energy storage power stations, achieving lower investment and operating energy consumption, and improving system safety and ease of operation and maintenance.
Patent Information
- Application Number
- CN202422905924.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Existing distributed liquid cooling systems for battery energy storage power stations suffer from problems such as difficulty in fault repair, high maintenance costs, high energy consumption, and large space occupation, making it difficult to meet the high-efficiency requirements of large-scale battery energy storage power stations.
A centralized battery energy storage liquid cooling thermal management system is adopted. By centrally arranging large-capacity liquid cooling units and skid-mounted structures, combined with air-cooled and water-cooled integrated liquid cooling units and plate heat exchangers, the cooling of the battery compartment is centrally managed, reducing the amount of cooling medium used and the amount of installation work, and improving system safety and energy efficiency.
It reduces investment costs and operating energy consumption, improves system safety margin and ease of operation and maintenance, reduces energy consumption by 42%, and reduces investment costs and floor space required for cooling media.
Smart Images
Figure CN223567955U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery energy storage heat management related technical field, more accurate to say is related to a centralized battery energy storage liquid cooling heat management system. BACKGROUND
[0002] With the continuous development of battery energy storage technology, the cost of battery energy storage is gradually reduced, and the number of battery energy storage power stations on the power grid side is increasing, and the scale is also increasing. In order to ensure the safe and stable operation of the battery energy storage power station, it is necessary to effectively manage its heat. Specifically, the existing battery energy storage heat management mainly adopts three ways of air cooling, liquid cooling and phase change cooling. Among them, the air cooling method is widely used in the early development stage of battery energy storage, which has the advantages of simple structure, low cost, etc., but the air cooling method has the disadvantages of low heat transfer coefficient, slow cooling speed and poor uniformity, which will cause the service life of the battery to be shortened for a long time, so the air cooling method is gradually eliminated. The phase change cooling method has the advantages of high heat transfer coefficient and fast cooling speed, but has the problems of high material cost, high cooling liquid leakage rate and poor stability, and cannot be applied on a large scale at present. With the increase of battery capacity and charge-discharge rate, the heat generation power of the battery is also larger, and the liquid cooling method has the advantages of good adaptability, good uniformity and low full life cycle cost, so it has become the mainstream cooling management method.
[0003] The battery energy storage power station includes many battery cabins, in order to improve the energy density, more battery packs are arranged in the battery cabin in the limited container space, and each battery pack needs to be temperature controlled. At present, the liquid cooling system of the energy storage power station generally adopts a distributed scheme, an independent liquid cooling system is arranged in each battery cabin, and the liquid cooling systems are not associated with each other. When a single liquid cooling system in the distributed scheme fails, the other liquid cooling systems cannot be replaced, and the corresponding battery cabin loses temperature control, which may cause the risk of battery thermal runaway. The independent liquid cooling system is difficult to maintain, the maintenance cost is high, and the overall energy consumption of multiple liquid cooling systems is also high. In addition, the liquid cooling system occupies a large space in the battery cabin, which reduces the space for arranging battery packs in the battery cabin and affects the energy storage density of the battery energy storage power station. It can be seen that the distributed liquid cooling system of the existing energy storage power station has many defects.
[0004] In summary, the liquid cooling heat management system of the energy storage power station needs to be improved to meet the increasing demand for large-scale and high-efficiency energy storage power stations. UTILITY MODEL CONTENTS
[0005] Therefore, the purpose of the utility model is to provide a centralized battery energy storage liquid cooling heat management system, which manages all battery cabins in the energy storage power station through a centralized liquid cooling system, reduces investment cost, land area and operating energy consumption.
[0006] In order to achieve the above object, the utility model provides centralized battery energy storage liquid cooling heat management system, provides centralized liquid cooling technical scheme for the energy storage power station which is composed of a plurality of energy storage field areas, each energy storage field area includes a plurality of battery cabins, and each battery cabin has a plurality of battery packs, the centralized battery energy storage liquid cooling heat management system includes liquid cooling station, primary side liquid cooling pipeline, CDU cabinet and secondary side liquid cooling pipeline, one CDU cabinet is installed in each battery cabin, the liquid cooling station is connected with the CDU cabinet through the primary side liquid cooling pipeline, the CDU cabinet has plate heat exchanger inside, and the cooling medium in the primary side liquid cooling pipeline and the cooling medium in the secondary side liquid cooling pipeline exchange heat in the plate heat exchanger.
[0007] Preferably, the liquid cooling station includes air cooling and cold water integrated liquid cooling unit and primary side high-level water tank connected by the primary side liquid cooling pipeline.
[0008] Preferably, the air cooling and cold water integrated liquid cooling unit is located at the top of the air outlet.
[0009] Preferably, the CDU cabinet has primary side heat exchange assembly combined with the primary side liquid cooling pipeline and secondary side heat exchange assembly combined with the secondary side liquid cooling pipeline.
[0010] Preferably, the primary side heat exchange assembly includes primary side water inlet valve and primary side water outlet valve installed on the primary side liquid cooling pipeline, the primary side water inlet valve is located at the water inlet end of the plate heat exchanger, and the primary side water outlet valve is located at the water outlet end of the plate heat exchanger, and a primary side bypass valve is arranged in front of the primary side water inlet valve and the primary side water outlet valve.
[0011] Preferably, the secondary side heat exchange assembly includes secondary side water inlet valve, secondary side water outlet valve, internal circulation pump and secondary side high-level water tank installed on the secondary side liquid cooling pipeline, the secondary side water inlet valve is located at the water inlet end of the plate heat exchanger, and the secondary side water outlet valve is located at the water outlet end of the plate heat exchanger.
[0012] Preferably, the primary side liquid cooling pipeline adopts a pipeline made of carbon steel, and the primary side liquid cooling pipeline is a factory prefabricated part and is quickly installed on site.
[0013] Preferably, the secondary side liquid cooling pipeline adopts a combination of stainless steel and nylon material, and the secondary side liquid cooling pipeline is a factory prefabricated part and is quickly installed on site.
[0014] Preferably, the liquid cooling station and the CDU cabinet adopt a pry-mounted structure.
[0015] Compared with the prior art, the centralized battery energy storage liquid cooling heat management system has the following advantages:
[0016] 1、The centralized battery energy storage liquid cooling thermal management system adopts a centralized arrangement of large refrigerating capacity liquid cooling unit, compared with a distributed multi-liquid cooling unit mode, has smaller floor area, lower investment cost and smaller operation energy consumption; is more convenient and efficient to handle during operation and maintenance, and has lower operation and maintenance cost; in terms of operation safety, the system safety margin can be improved by setting a standby unit.
[0017] 2、The centralized battery energy storage liquid cooling thermal management system adopts an air-cooled and water-cooled integrated liquid cooling unit, and the refrigeration coefficient COP is 4.25 (environmental temperature 35℃, cooling medium temperature 18℃), which performs well in energy efficiency, and can fully utilize natural cooling source cooling, and compared with the traditional distributed liquid cooling system, the energy consumption is reduced by 42%; in addition, the air-cooled and water-cooled integrated liquid cooling unit has an intelligent temperature control function, which can automatically select the best cooling mode according to the environmental temperature and the actual demand of the energy storage system, further improving the energy efficiency and stability of the system.
[0018] 3、During the operation of the air-cooled and water-cooled integrated liquid cooling unit of the centralized battery energy storage liquid cooling thermal management system, the high-temperature air outlet of air cooling is sent to a high altitude away from the air inlet, so as to avoid the occurrence of hot air backflow and the formation of heat island effect, and reduce the operation energy consumption.
[0019] 4、The CDU cabinet of the centralized battery energy storage liquid cooling thermal management system has a channel structure for separating the primary and secondary side cooling media by a plate heat exchanger, which reduces the filling amount of the higher-priced secondary side cooling medium, and effectively reduces the investment cost of the cooling medium.
[0020] 5、The primary side liquid cooling pipeline of the centralized battery energy storage liquid cooling thermal management system adopts carbon steel material, which can be pre-fabricated in the factory and quickly installed on site, has low pipeline investment cost, and can reduce the on-site installation workload; the secondary side liquid cooling pipeline adopts a combination of stainless steel and nylon material, which avoids the blockage of the small-diameter pipeline at the inlet and outlet of the battery pack due to rust, and also avoids the reduction of the heat exchange capacity of the liquid cooling plate of the battery pack due to rust. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0022] As Figure 1 shown is a whole schematic view of a centralized battery energy storage liquid cooling thermal management system according to the present application.
[0023] As Figure 2It is the CDU cabinet internal structure schematic view of the centralized battery energy storage liquid cooling thermal management system of the application.
[0024] The reference signs and component parts involved in the drawings are explained:
[0025] 1, liquid cooling station; 11, air-cooled water-cooled integrated liquid cooling unit; 12, primary side high water tank; 2, primary side liquid cooling pipeline; 3, CDU cabinet; 31, primary side water inlet valve; 32, primary side water outlet valve; 33, primary side bypass valve; 34, secondary side water inlet valve; 35, secondary side water outlet valve; 36, plate heat exchanger; 37, secondary side high water tank; 38, internal circulation pump; 4, secondary side liquid cooling pipeline; 5, energy storage field area, 51, battery cabin; 511, battery pack. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0027] As shown in Figure 1 and Figure 2 The centralized battery energy storage liquid cooling thermal management system of the application provides a centralized liquid cooling technical solution for an energy storage power station composed of a plurality of energy storage field areas 5. Each energy storage field area 5 includes a plurality of battery cabins 51, and each battery cabin 51 has a plurality of battery packs 511. The centralized battery energy storage liquid cooling thermal management system includes a liquid cooling station 1, a primary side liquid cooling pipeline 2, a plurality of CDU cabinets 3, and a plurality of secondary side liquid cooling pipelines 4. One CDU cabinet 3 is installed in each battery cabin 51. The liquid cooling station 1 is connected to the CDU cabinet 3 through the primary side liquid cooling pipeline 2. The CDU cabinet 3 has a plate heat exchanger 36 inside. The cooling medium in the primary side liquid cooling pipeline 2 and the cooling medium in the secondary liquid cooling pipeline 4 exchange heat in the plate heat exchanger 36.
[0028] The centralized battery energy storage liquid cooling thermal management system adopts a centralized arrangement of large refrigeration capacity liquid cooling units (water source liquid cooling units, single unit refrigeration capacity 250-1400 kW). Compared with the distributed liquid cooling unit (air source liquid cooling unit, single unit refrigeration capacity 5-80 kW) mode, the system has smaller floor area, lower investment cost, and smaller operating energy consumption. The system is more convenient and efficient to handle during operation and maintenance, and has lower operation and maintenance cost. In terms of operation safety, the system can improve the system safety margin by setting up standby units.
[0029] Specifically, the liquid cooling station 1 includes an air-cooled cold water integrated liquid cooling unit 11 connected by a primary side liquid cooling pipeline 2 and a primary side high-position water tank 12. The air outlet of the air-cooled cold water integrated liquid cooling unit 11 is located at the top, and the high-temperature air outlet gas during operation is transported to a high altitude to avoid hot air backflow or the formation of a heat island effect, and the overall operation energy consumption is smaller. The air-cooled cold water integrated liquid cooling unit 11 is a water source liquid cooling unit, and the mechanical refrigeration coefficient COP is 3-5, while the distributed liquid cooling unit is an air source liquid cooling unit, and the mechanical refrigeration coefficient COP is only 2-3. In the case of an ambient temperature of 35°C and a cooling medium temperature of 18°C, the mechanical refrigeration coefficient COP of the air-cooled cold water integrated liquid cooling unit 11 is higher than 4.25, and the air-cooled cold water integrated liquid cooling unit 11 can fully utilize the natural cooling source for cooling. Compared with the traditional distributed liquid cooling system, the energy consumption is reduced by 42%, and the energy consumption reduction effect is significant. At the same time, the air-cooled cold water integrated liquid cooling unit 11 is a liquid cooling unit with intelligent temperature control function, which can automatically select the best cooling mode according to the actual demand of the environment temperature and the energy storage system, and help to further provide the overall energy efficiency and stability of the system.
[0030] The primary side liquid cooling pipeline 2 adopts a carbon steel pipeline, which is prefabricated in the factory and quickly installed on the construction site. The carbon steel pipeline has a low cost and can be applied to the relatively large-diameter primary side liquid cooling pipeline 2, has a low risk of blockage, and has a small installation workload due to the prefabrication in the factory and quick installation on the construction site. The cooling medium in the primary side liquid cooling pipeline 2 is a mixture of soft water / water and ethylene glycol antifreeze.
[0031] The CDU cabinet 3 also has a primary side heat exchange assembly combined with the primary side liquid cooling pipeline 2 and a secondary side heat exchange assembly combined with the secondary side liquid cooling pipeline 4. The secondary side liquid cooling pipeline 4 adopts a combination of stainless steel and nylon material to avoid blockage of the battery pack inlet and outlet small-diameter pipeline due to rust and to avoid reduction of the heat exchange capacity of the battery pack liquid cooling plate due to rust. The cooling medium in the secondary side liquid cooling pipeline 4 is a mixture of water and ethylene glycol antifreeze / fluorinated electronic liquid. Since the primary side liquid cooling pipeline 2 and the secondary side liquid cooling pipeline 4 are separated by a plate heat exchanger 36, the filling amount of the secondary side cooling medium is reduced, and the unit price of the fluorinated electronic liquid in the secondary side cooling medium is much higher than that of the primary side cooling medium, effectively reducing the investment cost of the secondary side cooling medium.
[0032] The primary side heat exchange assembly comprises a primary side water inlet valve 31 and a primary side water outlet valve 32 installed on the primary side liquid cooling pipeline 2, the primary side water inlet valve 31 is located at the water inlet end of the plate heat exchanger 36, and the primary side water outlet valve 32 is located at the water outlet end of the plate heat exchanger 36. A primary side bypass valve 33 is arranged in front of the primary side water inlet valve 31 and the primary side water outlet valve 32. When heat exchange is needed, the primary side bypass valve 33 is closed, and the primary side water inlet valve 31 and the primary side water outlet valve 32 are turned on; when heat exchange is not needed / maintenance is needed, the primary side bypass valve 33 is turned on, and the primary side water inlet valve 31 and the primary side water outlet valve 32 are closed.
[0033] The secondary side heat exchange assembly comprises a secondary side water inlet valve 34, a secondary side water outlet valve 35, an internal circulation pump 38 and a secondary side high-level water tank 37 connected with the secondary side liquid cooling pipeline 4, the secondary side water inlet valve 34 is located at the water inlet end of the plate heat exchanger 36, and the secondary side water outlet valve 35 is located at the water outlet end of the plate heat exchanger 36. During circulation cooling, the internal circulation pump 38 pressurizes the cooling medium in the secondary side liquid cooling pipeline 4, so that the cooling medium circulates through the battery pack liquid cooling plate and exchanges heat with the battery, and the heated cooling medium flows through the plate heat exchanger 36 and exchanges heat with the cooling medium of the primary side liquid cooling pipeline 2. In order to ensure the operation of the secondary side cooling micro-positive pressure, the secondary side high-level water tank 37 is arranged.
[0034] Further, the liquid cooling station 1 and the CDU cabinet 3 adopt a pry-mounted structure, which is convenient for moving and installing and is conducive to reducing the installation cost.
[0035] The above description of 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 centralized battery energy storage liquid-cooled thermal management system, characterized in that, A centralized liquid cooling technology solution is provided for an energy storage power station consisting of several energy storage areas. Each energy storage area includes several battery compartments, and each battery compartment contains several battery packs. The centralized battery energy storage liquid cooling thermal management system includes a liquid cooling station, primary-side liquid cooling pipelines, CDU cabinets, and secondary-side liquid cooling pipelines. Each battery compartment is equipped with a CDU cabinet. The liquid cooling station is connected to the CDU cabinet through the primary-side liquid cooling pipelines. The CDU cabinet has a plate heat exchanger inside, and the cooling medium in the primary-side liquid cooling pipelines and the cooling medium in the secondary-side liquid cooling pipelines exchange heat in the plate heat exchanger.
2. The centralized battery energy storage liquid cooling and thermal management system as described in claim 1, characterized in that, The liquid cooling station includes an air-cooled chiller unit and a primary-side high-level water tank, which are connected by the primary-side liquid cooling pipeline.
3. The centralized battery energy storage liquid cooling and thermal management system as described in claim 2, characterized in that, The air outlet of the air-cooled chiller unit is located at its top.
4. The centralized battery energy storage liquid cooling and thermal management system as described in claim 1, characterized in that, The CDU cabinet has a primary-side heat exchange assembly connected to the primary-side liquid cooling pipeline and a secondary-side heat exchange assembly connected to the secondary-side liquid cooling pipeline.
5. The centralized battery energy storage liquid cooling and thermal management system as described in claim 4, characterized in that, The primary side heat exchange assembly includes a primary side inlet valve and a primary side outlet valve installed on the primary side liquid cooling pipeline. The primary side inlet valve is located at the inlet end of the plate heat exchanger, and the primary side outlet valve is located at the outlet end of the plate heat exchanger. A primary side bypass valve is provided before the primary side inlet valve and the primary side outlet valve.
6. The centralized battery energy storage liquid cooling and thermal management system as described in claim 4, characterized in that, The secondary heat exchange assembly includes a secondary inlet valve, a secondary outlet valve, an internal circulation pump, and a secondary high-level water tank installed on the secondary liquid cooling pipeline. The secondary inlet valve is located at the inlet end of the plate heat exchanger, and the secondary outlet valve is located at the outlet end of the plate heat exchanger.
7. The centralized battery energy storage liquid cooling and thermal management system as described in claim 1, characterized in that, The primary side liquid cooling pipeline is made of carbon steel and is a prefabricated component that can be quickly installed on site.
8. The centralized battery energy storage liquid cooling and thermal management system as described in claim 1, characterized in that, The secondary liquid cooling pipeline is made of a combination of stainless steel and nylon; and the secondary liquid cooling pipeline is a factory prefabricated component that can be quickly installed on site.
9. The centralized battery energy storage liquid cooling and thermal management system as described in claim 1, characterized in that, The liquid cooling station and the CDU cabinet adopt a skid-mounted structure.