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CN118984563A - Energy storage high voltage box, cooling system and control method of air-cooled converter - Google Patents

Energy storage high voltage box, cooling system and control method of air-cooled converter Download PDF

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Publication number
CN118984563A
CN118984563A CN202411063066.5A CN202411063066A CN118984563A CN 118984563 A CN118984563 A CN 118984563A CN 202411063066 A CN202411063066 A CN 202411063066A CN 118984563 A CN118984563 A CN 118984563A
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CN
China
Prior art keywords
air
cooling
heat exchanger
water
pipeline
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202411063066.5A
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Chinese (zh)
Inventor
吕庆林
徐牧野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Desheng New Energy Technology Co ltd
Original Assignee
Zhejiang Desheng New Energy Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Zhejiang Desheng New Energy Technology Co ltd filed Critical Zhejiang Desheng New Energy Technology Co ltd
Priority to CN202411063066.5A priority Critical patent/CN118984563A/en
Publication of CN118984563A publication Critical patent/CN118984563A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6563—Gases with forced flow, e.g. by blowers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6566—Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0209—Thermal insulation, e.g. for fire protection or for fire containment or for high temperature environments
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0213—Venting apertures; Constructional details thereof
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136—Forced ventilation, e.g. by fans
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/202—Air circulating in closed loop within enclosure wherein heat is removed through heat-exchangers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20209—Thermal management, e.g. fan control
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
    • H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
    • H05K7/20281—Thermal management, e.g. liquid flow control

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)

Abstract

本发明公开一种储能高压箱、风冷变流器的冷却系统及控制方法，包括液冷机组、冷却管路、风冷变流器和高压箱，冷却管路连接于液冷机组的出口端与出口端之间，冷却管路内安装有扰流件一和扰流件二，扰流件一的两端并联有旁通管路一，旁通管路一安装有水风换热器一和阀装置；扰流件二的两端并联有旁通管路一，旁通管路一安装有水风换热器二；还包括舱室一和舱室二，舱室一开设有通风孔道与外界环境连通，风冷变流器和水风换热器一位于舱室一内，舱室一内还设置有风扇一；高压箱和水风换热器二位于舱室二内，舱室二内还设置有风扇二。本发明能够实现风冷变流器、高压箱等部件的降温，解决了高温工况下的安全性、稳定性、经济性的问题。

The present invention discloses a cooling system and control method for an energy storage high-pressure box and an air-cooled converter, comprising a liquid cooling unit, a cooling pipeline, an air-cooled converter and a high-pressure box, wherein the cooling pipeline is connected between the outlet end and the outlet end of the liquid cooling unit, a spoiler 1 and a spoiler 2 are installed in the cooling pipeline, a bypass pipeline 1 is connected in parallel at both ends of the spoiler 1, and a water-air heat exchanger 1 and a valve device are installed in the bypass pipeline 1; a bypass pipeline 1 is connected in parallel at both ends of the spoiler 2, and a water-air heat exchanger 2 is installed in the bypass pipeline 1; and the present invention also comprises a cabin 1 and a cabin 2, wherein the cabin 1 is provided with a ventilation duct to communicate with the external environment, the air-cooled converter and the water-air heat exchanger 1 are located in the cabin 1, and a fan 1 is also provided in the cabin 1; the high-pressure box and the water-air heat exchanger 2 are located in the cabin 2, and a fan 2 is also provided in the cabin 2. The present invention can realize the cooling of components such as the air-cooled converter and the high-pressure box, and solves the problems of safety, stability and economy under high temperature conditions.

Description

Cooling system and control method for energy storage high-voltage box and air-cooled converter
Technical Field
The invention relates to the technical field of battery energy storage, in particular to a cooling system of an energy storage high-voltage box and an air-cooled converter, and also relates to a control method of the cooling system.
Background
The energy storage cabinet mainly comprises a battery cluster, a converter, a high-voltage box and other components, wherein each component generates heat during working, the battery cluster dissipates heat and cools in a liquid cooling mode, the converter and the high-voltage box generally dissipate heat in an air cooling mode, and the high-voltage box and the battery cluster are placed in a closed battery compartment together; the air-cooled converter is placed in the converter cabin, and the fan is used to radiate heat to the outside, as shown in fig. 2.
The upper limit of the air-cooled heat dissipation mode is lower, and the heat dissipation efficiency of the air-cooled heat dissipation mode is obviously reduced along with the increase of the ambient temperature, especially in hot summer, so that the converter cannot work normally, the working efficiency is reduced, and the economic benefit of the energy storage cabinet is obviously reduced. When encountering severe extreme hot weather, the converter can be stopped even directly, and the equipment cannot work, so that great loss is caused.
The components inside the high-voltage box can always generate heat under the working state, in the existing energy storage cabinet, the high-voltage box and the battery pack are arranged in the same battery compartment, and due to the protection requirement of the battery pack, the space is sealed and insulated, so that the heat dissipation of the high-voltage box is not facilitated. Although the battery pack uses cooling liquid to dissipate heat, certain heat of the battery compartment can be taken away, a small part of the battery pack dissipates heat to the battery compartment in a radiation heat dissipation mode, and particularly under the condition of overhigh external environment temperature, radiation heat dissipation of the battery pack and heat generation of a power element of the high-voltage box are overlapped, so that the temperature inside the high-voltage box exceeds the working temperature of the high-voltage box, and internal key components of the high-voltage box fail due to overhigh temperature, so that the operation stability of the whole system is affected.
There is therefore a need to propose a new solution to this problem.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provide a cooling system of an energy storage high-voltage box and an air-cooled converter, which can realize the cooling of the components such as the air-cooled converter, the high-voltage box and the like, solve the problems of safety, stability and economy under the high-temperature working condition,
In order to achieve the above purpose, the present invention adopts the following technical scheme: the cooling system comprises a liquid cooling unit, a cooling pipeline, an air cooling converter and a high-pressure tank, wherein the cooling pipeline is connected between an outlet end and an outlet end of the liquid cooling unit, a first turbulence piece and a second turbulence piece are arranged in the cooling pipeline, two ends of the first turbulence piece are connected with a first bypass pipeline in parallel, the first bypass pipeline is provided with a first water-air heat exchanger and a valve device, and the valve device can control the on-off of the first bypass pipeline; the two ends of the spoiler II are connected in parallel with a first bypass pipeline, and the first bypass pipeline is provided with a second water-air heat exchanger;
The air cooling converter is characterized by further comprising a first cabin and a second cabin, wherein a ventilation duct is formed in the first cabin and is communicated with the external environment, the air cooling converter and the first water-air heat exchanger are positioned in the first cabin, a first fan is further arranged in the first cabin, and the first fan can realize air circulation between the first water-air heat exchanger and the air cooling converter; the high-pressure tank and the water-air heat exchanger are located in a second cabin, a second fan is further arranged in the second cabin, and air circulation between the second water-air heat exchanger and the high-pressure tank can be achieved through the second fan.
The invention further provides that the first water-wind heat exchanger and the valve device are connected in series with the first bypass pipeline, and the valve device is positioned at the downstream of the first water-wind heat exchanger.
The invention is further arranged that the cabin I is provided with a ventilation duct which is communicated with the external environment; the second cabin is a closed heat insulation cabin.
The invention is further arranged to further comprise a first temperature sensor, wherein the first temperature sensor is arranged on a cooling pipeline at the downstream of the turbulence piece, and the downstream port of the first bypass pipeline is connected with the cooling pipeline between the first turbulence piece and the first temperature sensor.
The invention further provides that the air-cooled converter and the high-voltage box are both provided with temperature sensors.
The invention is further arranged that the first turbulence piece and the second turbulence piece are connected in series with the cooling pipeline, the first turbulence piece is positioned at the upstream of the second turbulence piece, and the first temperature sensor is positioned between the first turbulence piece and the second turbulence piece; the upstream port of the bypass pipeline I is connected with a cooling pipeline between the temperature sensor I and the spoiler II.
The invention further provides a water-air heat exchanger, which also comprises a second temperature sensor and a fourth temperature sensor, wherein the second temperature sensor is arranged on the first bypass pipeline and is arranged at the downstream position of the second water-air heat exchanger; and the temperature sensor IV is arranged at the inlet end of the liquid cooling unit.
The invention further provides a temperature sensor III, and the temperature sensor III is arranged at the outlet end of the liquid cooling unit.
The invention also provides a control method of the cooling system, which adopts the cooling system of the energy storage high-voltage box and the air cooling converter, and comprises the following steps:
The cooling liquid is output from the outlet end of the liquid cooling unit and circulates along a cooling pipeline, and flows through the battery clusters to cool the battery clusters;
Then, the cooling liquid is divided into two paths, the two paths respectively flow through a first water-air heat exchanger and a first turbulence piece, air-cooling heat exchange is realized between the first water-air heat exchanger and the air-cooling converter through a first fan, the first turbulence piece can turbulence the cooling liquid, and then the two paths of cooling liquid are recombined in a cooling pipeline;
Then the cooling liquid is divided into two paths, the two paths respectively flow through a second water-air heat exchanger and a second turbulence piece, air-cooling heat exchange is realized between the second water-air heat exchanger and the high-pressure tank through a second fan, the second turbulence piece can turbulence the cooling liquid, and then the two paths of cooling liquid are recombined in a cooling pipeline;
And then, the cooling liquid flows back to the inlet end of the liquid cooling unit along the cooling pipeline, so that the cooling liquid circulation is realized.
When the temperature of the air-cooled converter 7 is higher than a preset value, a valve device of a bypass pipeline I is opened, cooling liquid flows through a water-air heat exchanger I, and air-cooled heat exchange is realized between the water-air heat exchanger I and the air-cooled converter through a fan I; the temperature difference value between the first temperature sensor and the air-cooled converter is a1, the rotating speed of the first fan is controlled according to the temperature difference value a1, when the temperature of the air-cooled converter exceeds a set value, a valve device on the first bypass pipeline is opened, the rotating speed of the first fan is set to be an initial preset value, and the rotating speed of the first fan is gradually increased until the rotating speed is maximum along with the increase of the temperature difference value a 1;
When the temperature of the air-cooled converter is not higher than a preset value, the valve device of the bypass pipeline I is closed, and the cooling liquid cannot flow through the water-air heat exchanger I;
when the temperature of the high-pressure box is higher than a preset value, the second fan works, the temperature difference between the temperature of the high-pressure box and the first temperature sensor is a2, the temperature difference between the fourth temperature sensor and the third temperature sensor is a3, the temperature difference a2 reaches a set lower limit value and is smaller than a set upper limit value, and when the temperature difference a3 does not exceed the set value, the rotating speed of the second fan is adjusted according to the a2, and the larger the a2 is, the higher the rotating speed is, until the maximum is reached; when the temperature difference a2 is smaller than the set lower limit value or the temperature difference a3 exceeds the set value, the second fan is directly turned off.
In summary, the invention has the following beneficial effects:
According to the invention, the air-cooled converter, the water-air heat exchanger I and the fan I are arranged in the cabin I, the cabin I is provided with a ventilation duct which is communicated with the external environment, and heat dissipation can be realized through air circulation inside and outside the cabin I. When the air cooling converter is in a high-temperature working condition, the heat exchange quantity of natural wind to the air cooling converter can not meet the heat exchange requirement, the water-air heat exchanger can exchange heat between cooling liquid and air to form relatively low-temperature cold air, and the fan can blow cold air to the periphery of the air cooling converter to cool, so that cooling under the high-temperature working condition is realized.
When the system is in a low-temperature working condition, heat of a battery pack in the system is transferred to the cooling liquid through the liquid cooling plate, then the high-temperature cooling liquid flows into the heat exchanger, and as the whole converter cabin is communicated with the external environment, the temperature of the whole converter cabin is basically consistent with the temperature of the external environment and is in a low-temperature environment, the heat can be emitted to the converter cabin through the heat exchanger and then is emitted to the environment through the circulation of the fan, so that a liquid cooling unit refrigerating system with higher power consumption is prevented from being started, and the low-temperature economy of the whole system is improved.
According to the invention, the high-pressure box is arranged in the sealed and heat-insulating cabin II, the water-air heat exchanger II and the fan II are arranged in the cabin II, one path of the water-air heat exchanger II is separated from the cooling pipeline and connected into the water-air heat exchanger II, air circulation can be formed in the cabin II by virtue of the effect of the fan II, the cabin II is cooled, the sealed and heat-insulating cabin II can be ensured to be in a state of approximately keeping constant temperature, the influence of the area caused by the increase of the external temperature is avoided, and the safety and the stability of the system under high temperature are effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of a cooling system of an energy storage high-voltage tank and an air-cooled converter in the present embodiment;
Fig. 2 is a schematic diagram of a prior art structure.
Reference numerals: a liquid cooling unit 1; an outlet end 101; an inlet end 102; a cooling line 2; a battery cluster 3; a battery pack 4; a high-pressure tank 5; cabin one 6; an air-cooled converter 7; a spoiler I8; a bypass line I9; a water-wind heat exchanger I10; a first fan 11; a valve device 12; cabin two 13; a spoiler II 14; a second water-wind heat exchanger 15; a second fan 16; a first temperature sensor 17; a second temperature sensor 18; a third temperature sensor 19; a temperature sensor IV 20; a bypass line one 21;
1' a liquid cooling unit; 2' cooling pipeline; a 3' battery compartment; a 4' battery cluster; a 5' high pressure tank; a 6' converter compartment; 7' converter.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment discloses a cooling system of an energy storage high-voltage tank and an air-cooled converter, referring to fig. 1, the cooling system comprises a liquid cooling unit 1, a cooling pipeline 2, an air-cooled converter 7 and a high-voltage tank 5, wherein the cooling pipeline 2 is connected between an outlet end 101 and an outlet end 102 of the liquid cooling unit 1, and cooling liquid forms circulation between the outlet end 101 and the outlet end 102 of the liquid cooling unit 1 through the cooling pipeline 2.
In addition, the cooling system further comprises a battery cluster 3, and the battery cluster 3 is connected to the cooling pipeline 2 and is positioned near the outlet end 101 of the liquid cooling unit 1. The cooling liquid in the cooling pipeline 2 firstly flows through the battery cluster 3 for heat exchange, and then flows through other components for heat exchange. The battery cluster 3 comprises a plurality of battery packs 4, the battery packs 4 are mutually connected in parallel, and cooling liquid flows through the battery packs 4 to exchange heat respectively and then flows into the cooling pipeline 2 to be converged.
The first spoiler 8 and the second spoiler 14 are arranged in the cooling pipeline 2, and the first spoiler 8 and the second spoiler 14 have certain flow resistance and play roles in balancing flow and spoiler.
The two ends of the spoiler I8 are connected in parallel with a bypass pipeline I9, and the bypass pipeline I9 is provided with a water-air heat exchanger I10 and a valve device 12. When the cooling liquid flows through the first water-air heat exchanger 10, the cooling liquid can exchange heat with the first water-air heat exchanger 10, and the first water-air heat exchanger 10 can exchange heat with air through air circulation, so that the cooling liquid and the air can exchange heat, and low-temperature cold air is formed near the first water-air heat exchanger 10.
The valve device 12 can control the on-off of the bypass line one 9, and the water-air heat exchanger one 10 and the valve device 12 are connected in series with the bypass line one 9, and the valve device 12 is positioned downstream of the water-air heat exchanger one 10. The valve device 12 can specifically adopt a two-way valve, and only plays a role in controlling the on-off of the bypass pipeline one 9.
The two ends of the spoiler II 14 are connected in parallel with a first bypass pipeline 21, and the first bypass pipeline 21 is provided with a second water-air heat exchanger 15. When the cooling liquid flows through the second water-air heat exchanger 15, the cooling liquid can exchange heat with the second water-air heat exchanger 15, and the second water-air heat exchanger 15 can exchange heat with air through air circulation, so that the cooling liquid and the air can exchange heat, and low-temperature cold air is formed near the second water-air heat exchanger 15.
The cooling system in this embodiment further includes a first cabin 6 and a second cabin 13, where the first air-cooled converter 7 and the first water-air heat exchanger 10 are located in the first cabin 6, and a first fan 11 is installed in the first cabin 6, and when the first fan 11 works, it can drive air to circulate, so as to realize cooling and heat exchange between the first water-air heat exchanger 10 and the second air-cooled converter 7, and cool the second air-cooled converter 7.
The high-pressure tank 5 and the second water-air heat exchanger 15 are located in the second cabin 13, the second fan 16 is installed in the second cabin 13, and when the second fan 16 works, air circulation can be driven, so that cooling heat exchange between the second water-air heat exchanger 15 and the high-pressure tank 5 is realized, and the high-pressure tank 5 is cooled.
Due to the design requirement of the high-pressure tank 5, the second cabin 13 is a closed heat insulation cabin and is closed with the external environment, and the second fan 16 drives air to circulate inside the second cabin 13, so that the high-pressure tank 5 is cooled. And the first cabin 6 is provided with a ventilation duct which is communicated with the external environment, and when the first fan 11 works, the first fan can drive the external air to flow through the air-cooled converter 7, so that the air-cooled converter 7 can be cooled by air. In addition, in the air cooling process, by means of the cooling effect of the first water-air heat exchanger 10, cold air with low temperature can be formed, and then the heat dissipation effect of the air-cooled converter 7 can be improved.
The cooling system in this embodiment further includes a plurality of temperature sensors, specifically including a first temperature sensor 17, a second temperature sensor 18, a third temperature sensor 19 and a fourth temperature sensor 20, and the temperature of the cooling liquid in each pipeline in the cooling system is detected by each temperature sensor, so as to obtain the current state of the cooling system, so as to control the cooling system to continuously and stably operate. Temperature sensors are also provided in the air-cooled converter 7 and the high-pressure tank 5, and the temperature in the air-cooled converter 7 and the high-pressure tank 5 is detected by the sensors and is also used as a parameter for cooling system control.
Wherein, the first temperature sensor 17 is installed on the cooling pipeline 2 downstream of the first spoiler 8, and the downstream port of the first bypass pipeline 9 is connected with the cooling pipeline 2 between the first spoiler 8 and the first temperature sensor 17. That is, the cooling liquid is divided into two paths, and after flowing through the spoiler 8 and the water-air heat exchanger 10, the two paths of cooling liquid are converged in the cooling pipeline 2, and the temperature sensor 17 detects the temperature of the converged cooling liquid.
The first turbulence piece 8 can balance the flow of two paths of cooling liquid on one hand, most of cooling can directly circulate from the cooling pipeline 2, and a small part of cooling is shunted to the first bypass pipeline 9 to exchange heat with the first water-air heat exchanger 10 so as to cool the air-cooled converter 7; on the other hand, can carry out the vortex to the coolant liquid in the middle of the pipeline, form the torrent, mix the back at two way coolant liquid, can circulate rapidly for the temperature after the coolant liquid mixes can be quick even.
In addition, the first spoiler 8 and the second spoiler 14 are connected in series with the cooling pipeline 2, the first spoiler 8 is located upstream of the second spoiler 14, and the first temperature sensor 17 is located between the first spoiler 8 and the second spoiler 14. The upstream port of the bypass line one 21 is connected to the cooling line 2 between the temperature sensor one 17 and the spoiler two 14.
The second temperature sensor 18 is installed on the first bypass pipeline 21 and is installed at the downstream position of the second water-air heat exchanger 15, and the temperature of the cooling liquid flowing through the first bypass pipeline 21 after heat exchange of the second water-air heat exchanger 15 can be detected through the second temperature sensor 18. The fourth temperature sensor 20 is mounted at the inlet 102 of the fluid cooling unit 1.
The cooling liquid is divided into two paths when flowing through the second turbulence piece 14 and the second water-air heat exchanger 15, and flows through the second turbulence piece 14 and the second water-air heat exchanger 15 respectively, and then the two paths of cooling liquid are converged in the cooling pipeline 2, and the cooling liquid continues to flow to the inlet end 102 of the liquid cooling unit 1 along the cooling pipeline 2. The temperature sensor four 20 can detect the temperature of the cooling liquid after the confluence, and the temperature represents the temperature after the confluence of the two paths of cooling liquid on one hand, and represents the reflux temperature of the cooling liquid of the liquid cooling unit 1 on the other hand.
The third temperature sensor 19 is attached to the outlet end 101 of the liquid cooling unit 1, and the third temperature sensor 19 can detect the coolant output temperature of the liquid cooling unit 1.
The embodiment also discloses a control method of the cooling system, which adopts the cooling system of the energy storage high-voltage box and the air cooling converter, and the control method specifically comprises the following steps:
The cooling liquid circulates between the outlet end 101 and the inlet end 102 of the liquid cooling unit 1 through the cooling pipe 2. The cooling liquid is output from the outlet end 101 of the liquid cooling unit 1 and flows along the cooling pipeline 2, and flows through the battery clusters 3 to cool the battery clusters 3.
Since the first bypass line 9 is provided with the valve device 12, the first bypass line 9 can be controlled by the valve device 12, and thus whether the cooling liquid flows through the first water-air heat exchanger 10. When the valve device 12 is opened, the cooling liquid is divided into two paths, and flows through the first water-air heat exchanger 10 and the first turbulence piece 8 respectively, air-cooling heat exchange is realized between the first water-air heat exchanger 10 and the air-cooling converter 7 through the first fan 11, the first turbulence piece 8 can turbulence the cooling liquid, and then the two paths of cooling liquid are converged again in the cooling pipeline 2; when the valve device 12 is closed, the coolant does not pass through the first hydro-wind heat exchanger 10, but only passes through the first spoiler 8.
Then the cooling liquid is divided into two paths, the two paths respectively flow through a second water-air heat exchanger 15 and a second turbulence piece 14, air-cooling heat exchange is realized between the second water-air heat exchanger 15 and the high-pressure tank 5 through a second fan 16, the second turbulence piece 14 can turbulence the cooling liquid, and then the two paths of cooling liquid are converged again in the cooling pipeline 2.
Then, the cooling liquid flows back to the inlet end 102 of the liquid cooling unit 1 along the cooling pipeline 2, so that the cooling liquid circulation is realized.
The temperature sensors in the cooling system control system can detect the temperature of the cooling liquid at corresponding positions and the temperatures of the air-cooled converter 7 and the high-pressure tank 5, and control the working state of the cooling system according to the temperatures at the positions.
When the temperature of the air-cooled converter 7 is not higher than the preset value, the heat dissipation of the air-cooled converter 7 can meet the requirement, the valve device 12 of the bypass pipeline I9 is closed, the cooling liquid cannot flow through the water-air heat exchanger I10, and the air-cooled heat exchange can be carried out only through the fan of the air-cooled converter 7.
When the temperature of the air-cooled converter 7 is higher than a preset value, a valve device 12 of a bypass pipeline I9 is opened, cooling liquid flows through a water-air heat exchanger I10, and air-cooled heat exchange is realized between the water-air heat exchanger I10 and the air-cooled converter 7 through a fan I11; and, the supplementary cooling is realized by means of the low temperature of the first water-wind heat exchanger 10. The temperature difference between the air-cooled converter 7 and the first temperature sensor 17 is a1, the rotating speed of the first fan 11 is controlled according to the temperature difference a1, when the temperature of the air-cooled converter 7 exceeds a set value, the valve device 12 on the first bypass pipeline 9 is opened, the rotating speed of the first fan 11 is set to be an initial preset value, and the rotating speed of the first fan 11 is gradually increased until the rotating speed is maximum along with the increase of the temperature difference a 1.
When the temperature of the high-pressure tank 5 is higher than a preset value, the second fan 16 works, the second fan 16 drives air to circulate in the first bypass pipeline 21, and the high-pressure tank 5 can be cooled through the second water-air heat exchanger 15. And, the operation of the second fan 16 is controlled according to the temperature variation between the three temperature sensors.
The temperature difference between the temperature of the high-pressure tank 5 and the temperature of the first temperature sensor 17 is a2, the temperature difference between the fourth temperature sensor 20 and the third temperature sensor 19 is a3, when the temperature difference a2 reaches the set lower limit value and is smaller than the set upper limit value, and when the temperature difference a3 does not exceed the set value, the rotating speed of the second fan 16 is adjusted according to the a2, the higher the rotating speed of the a2 is, the higher the rotating speed of the fan reaches when the a2 reaches the upper limit value, the higher air flow can be formed at the moment, the heat exchange amount between the second water-air heat exchanger 15 and the high-pressure tank 5 is increased, the heat dissipation amount of the high-pressure tank 5 is increased, and the cooling and heat dissipation of the high-pressure tank 5 are facilitated. When the temperature difference a2 is smaller than the set lower limit value or the temperature difference a3 exceeds the set value, the second fan 16 is directly turned off.
And when the temperature of the high-pressure tank 5 is lower than the preset value of the lower limit, the second fan 16 stops operating.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims (10)

1. The cooling system is characterized by comprising a liquid cooling unit (1), a cooling pipeline (2), an air cooling converter (7) and a high-pressure box (5), wherein the cooling pipeline (2) is connected between an outlet end (101) and an outlet end (102) of the liquid cooling unit (1), a first turbulence piece (8) and a second turbulence piece (14) are arranged in the cooling pipeline (2), two ends of the first turbulence piece (8) are connected with a first bypass pipeline (9) in parallel, the first bypass pipeline (9) is provided with a first water-air heat exchanger (10) and a valve device (12), and the valve device (12) can control the on-off of the first bypass pipeline (9); two ends of the spoiler II (14) are connected with a bypass pipeline I (21) in parallel, and the bypass pipeline I (21) is provided with a water-air heat exchanger II (15);
the air cooling system further comprises a first cabin (6) and a second cabin (13), wherein a ventilation duct is formed in the first cabin (6) and is communicated with the external environment, the air cooling converter (7) and the first water-air heat exchanger (10) are located in the first cabin (6), a first fan (11) is further arranged in the first cabin (6), and the first fan (11) can realize air circulation between the first water-air heat exchanger (10) and the air cooling converter (7); the high-pressure tank (5) and the water-air heat exchanger II (15) are located in the cabin II (13), a fan II (16) is further arranged in the cabin II (13), and the fan II (16) can achieve air circulation between the water-air heat exchanger II (15) and the high-pressure tank (5).
2. A cooling system for an energy storage high pressure tank, an air cooled converter according to claim 1, characterized in that the water-air heat exchanger one (10) and the valve means (12) are connected in series to the bypass line one (9), the valve means (12) being located downstream of the water-air heat exchanger one (10).
3. The cooling system of an energy storage high-voltage tank and an air-cooled converter according to claim 1, wherein the second cabin (13) is a closed heat insulation cabin.
4. The cooling system of an energy storage high-voltage tank and an air-cooled converter according to claim 1, further comprising a first temperature sensor (17), wherein the first temperature sensor (17) is mounted on a cooling pipeline (2) downstream of the first spoiler (8), and a downstream port of the first bypass pipeline (9) is connected to the cooling pipeline (2) between the first spoiler (8) and the first temperature sensor (17).
5. The cooling system of an energy-storing high-voltage tank and an air-cooled converter according to claim 4, wherein the air-cooled converter (7) and the high-voltage tank (5) are both provided with temperature sensors.
6. The cooling system of an energy storage high-voltage tank and an air-cooled converter according to claim 4, wherein a first spoiler (8) and a second spoiler (14) are connected in series with the cooling pipeline (2), the first spoiler (8) is positioned upstream of the second spoiler (14), and the first temperature sensor (17) is positioned between the first spoiler (8) and the second spoiler (14); the upstream port of the bypass line I (21) is connected to the cooling line (2) between the temperature sensor I (17) and the spoiler II (14).
7. The cooling system of the energy storage high-voltage box and the air-cooled converter according to claim 6, further comprising a second temperature sensor (18) and a fourth temperature sensor (20), wherein the second temperature sensor (18) is installed on the first bypass pipeline (21) and is installed at a position downstream of the second water-air heat exchanger (15); and the temperature sensor IV (20) is arranged at the inlet end (102) of the liquid cooling unit (1).
8. The cooling system of an energy storage high-voltage tank and an air-cooled converter according to claim 7, further comprising a third temperature sensor (19), wherein the third temperature sensor (19) is mounted at an outlet end (101) of the liquid cooling unit (1).
9. A cooling system control method, characterized in that a cooling system of an energy storage high-voltage tank, an air-cooled converter according to any one of claims 1 to 8 is used, the control method comprising:
The cooling liquid flows along the cooling pipeline (2) from the output end (101) of the liquid cooling unit (1), and flows through the battery cluster (3) to cool the battery cluster (3);
Then, cooling liquid is divided into two paths, the two paths respectively flow through a first water-air heat exchanger (10) and a first turbulence piece (8), air-cooling heat exchange is realized between the first water-air heat exchanger (10) and the air-cooling converter (7) through a first fan (11), the first turbulence piece (8) can turbulence the cooling liquid to realize diversion and depressurization, and then the two paths of cooling liquid are recombined in the cooling pipeline (2);
Then the cooling liquid is divided into two paths, the two paths respectively flow through a second water-air heat exchanger (15) and a second turbulence piece (14), air-cooling heat exchange is realized between the second water-air heat exchanger (15) and the high-pressure tank (5) through a second fan (16), the second turbulence piece (14) can turbulence the cooling liquid to realize diversion and depressurization, and then the two paths of cooling liquid are recombined in the cooling pipeline (2);
and then, the cooling liquid flows back to the inlet end (102) of the liquid cooling unit (1) along the cooling pipeline (2) to realize cooling liquid circulation.
10. A cooling system control method according to claim 9, wherein,
When the temperature of the air-cooled converter (7) is higher than a preset value, a valve device (12) of a bypass pipeline I (9) is opened, cooling liquid flows through a water-air heat exchanger I (10), and air-cooled heat exchange is realized between the water-air heat exchanger I (10) and the air-cooled converter (7) through a fan I (11); the temperature difference value of the air-cooled converter (7) and the first temperature sensor (17) is a1, the rotating speed of the first fan (11) is controlled according to the temperature difference value a1, when the temperature of the air-cooled converter (7) exceeds a set value, a valve device (12) on the first bypass pipeline (9) is opened, the rotating speed of the first fan (11) is set to be an initial preset value, and the rotating speed of the first fan (11) is gradually increased until the rotating speed is maximum along with the increase of the temperature difference value a 1;
When the temperature of the air-cooled converter (7) is not higher than a preset value, the valve device (12) of the bypass pipeline I (9) is closed, and the cooling liquid cannot flow through the water-air heat exchanger I (10);
When the temperature of the high-pressure box (5) is higher than a preset value, the second fan (16) works, the temperature difference value between the temperature of the high-pressure box (5) and the temperature sensor I (17) is a2, the temperature difference value between the temperature sensor IV (20) and the temperature sensor III (19) is a3, the temperature difference value a2 reaches a set lower limit value and is smaller than a set upper limit value, and when the temperature difference value a3 does not exceed the set value, the rotating speed of the second fan (16) is adjusted according to the a2, and the larger the rotating speed of the second fan a2 is, the higher the rotating speed is, until the rotating speed is maximum; when the temperature difference a2 is smaller than the set lower limit value or the temperature difference a3 exceeds the set value, the second fan (16) is directly turned off.
CN202411063066.5A 2024-08-05 2024-08-05 Energy storage high voltage box, cooling system and control method of air-cooled converter Pending CN118984563A (en)

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CN202411063066.5A CN118984563A (en) 2024-08-05 2024-08-05 Energy storage high voltage box, cooling system and control method of air-cooled converter

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Application Number Priority Date Filing Date Title
CN202411063066.5A CN118984563A (en) 2024-08-05 2024-08-05 Energy storage high voltage box, cooling system and control method of air-cooled converter

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CN118984563A true CN118984563A (en) 2024-11-19

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