CN220253324U - Thermal management system for energy storage system, energy storage system and photovoltaic energy storage system - Google Patents

Abstract

The application discloses an energy storage system's thermal management system, energy storage system and photovoltaic energy storage system belongs to energy storage technical field. The energy storage system includes an energy storage battery and a power electronic device, the thermal management system includes: the first path of the first heat exchanger is communicated with the heat exchange circulation loop, the second heat exchanger is an air cooling heat exchanger, and the second heat exchanger is communicated with the heat exchange circulation loop; the second path of the first heat exchanger and the heat exchange part of the energy storage battery are both communicated with the first heat exchange path; the heat exchange part of the power electronic equipment is communicated with the second heat exchange passage; the third heat exchange passage is provided with a radiator; a first pump; and the valve group is connected between the first pump and the first to third heat exchange passages and used for selectively connecting or disconnecting the first pump and the first to third heat exchange passages. Through the arrangement of the valve group, the whole volume of the thermal management system is reduced, and meanwhile, the operation energy efficiency of the system is improved.

Description

Thermal management system for energy storage system, energy storage system and photovoltaic energy storage system

Technical Field

The application belongs to the technical field of energy storage, and particularly relates to a thermal management system of an energy storage system, the energy storage system and a photovoltaic energy storage system.

Background

The energy storage system can be specifically divided into an energy storage battery and power electronic equipment, and in the working process of the energy storage system, the energy storage battery and the power electronic equipment can generate heat, and a temperature control system is required to be built in so that the energy storage battery and the power electronic equipment are in a proper temperature environment. In the related art, two mutually independent temperature control systems are generally utilized to respectively control the temperature of the energy storage battery and the power electronic equipment, but in the scheme, the temperature control system of the whole energy storage system is large in size, poor in energy efficiency and poor in integration level.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides the thermal management system, the energy storage system and the photovoltaic energy storage system of the energy storage system, so that the whole volume of the thermal management system is reduced, and meanwhile, the operation energy efficiency of the system is improved.

In a first aspect, the present application provides a thermal management system for an energy storage system comprising an energy storage battery and a power electronic device, the thermal management system comprising:

the first path of the first heat exchanger is communicated with the heat exchange circulation loop, the second heat exchanger is an air cooling heat exchanger, and the second heat exchanger is communicated with the heat exchange circulation loop;

the second path of the first heat exchanger and the heat exchange part of the energy storage battery are both communicated with the first heat exchange path;

the heat exchange part of the power electronic equipment is communicated with the second heat exchange passage;

a third heat exchange path having a radiator;

a first pump;

and the valve group is connected between the first pump and the first to third heat exchange passages and used for selectively connecting or disconnecting the first pump and the first to third heat exchange passages.

According to the thermal management system of the energy storage system, through the arrangement of the valve bank, the temperature of the energy storage battery and the power electronic equipment is controlled by one system, so that the thermal management system can have more working modes according to different environment temperatures, the whole volume of the thermal management system is reduced, and meanwhile, the operation energy efficiency of the system is improved.

According to one embodiment of the present application, the valve block has first to eighth valve ports, two ends of the first pump are connected to the first valve port and the second valve port, two ends of the second heat exchange passage are connected to the third valve port and the fourth valve port, two ends of the third heat exchange passage are connected to the fifth valve port and the sixth valve port, and two ends of the first heat exchange passage are connected to the seventh valve port and the eighth valve port.

According to one embodiment of the present application, the third heat exchange passage has a first radiator and a second radiator, the valve block further has a ninth valve port and a tenth valve port, two ends of the first radiator are respectively connected with the fifth valve port and the ninth valve port of the valve block, and two ends of the second radiator are respectively connected with the tenth valve port and the sixth valve port of the valve block.

According to one embodiment of the present application, the thermal management system has a first mode of operation in which the first heat exchange passage is closed and the first pump, the second heat exchange passage and the third heat exchange passage are in communication.

According to one embodiment of the present application, the third heat exchange path has a first heat sink and a second heat sink,

in the first working mode, the first heat exchange passage is closed, and the first pump, the second heat exchange passage, the first radiator and the second radiator are communicated.

According to one embodiment of the present application, the third heat exchange path has a first heat sink and a second heat sink,

the thermal management system has a second mode of operation in which the first heat exchange passage is in communication with the second heat sink and the first pump, the second heat exchange passage is in communication with the first heat sink.

According to one embodiment of the present application, in the second operation mode, both the heat exchange circulation loop and the second radiator are in an operation state.

According to one embodiment of the present application, the first heat exchange path has a heater and a second pump.

According to one embodiment of the application, the thermal management system has a third mode of operation in which the first heat exchange path and the second heat exchange path are in communication, the first pump is disconnected, the third heat exchange path is disconnected, and the heater is in an operating state.

According to one embodiment of the present application, the thermal management system has a fourth mode of operation in which the first heat exchange passage and the third heat exchange passage are in communication, the first pump is disconnected, and the second heat exchange passage is disconnected.

According to one embodiment of the present application, the third heat exchange path has a first heat sink and a second heat sink,

in the fourth operation mode, the first heat exchange passage, the first radiator and the second radiator are communicated, the first pump is disconnected, and the second heat exchange passage is disconnected.

In a second aspect, the present application provides an energy storage system comprising:

an energy storage battery and power electronics;

a thermal management system as in any above, electrically connected with the energy storage battery and the power electronics.

According to the energy storage system, through the arrangement of the thermal management system, the scheme of adjusting temperature control of the system according to the external environment and the working state of the device is realized, the occupied space of the energy storage system is greatly reduced, the power consumption is reduced, and the energy is saved.

In a third aspect, the present application provides a photovoltaic energy storage system comprising:

an energy storage system as in the above;

and the photovoltaic power generation system is used for supplying power to the energy storage system.

According to the photovoltaic power generation system, through the arrangement of the energy storage system, the volume of the whole photovoltaic energy storage system is reduced, and therefore the overall structural design is simplified; meanwhile, the power loss during the operation of the system is reduced, so that the purpose of energy conservation is achieved, and the photovoltaic power generation efficiency is further improved.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:

fig. 1 is a schematic structural diagram of an energy storage system in a first mode according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an energy storage system according to an embodiment of the present disclosure in a second mode;

FIG. 3 is a schematic diagram of an energy storage system according to an embodiment of the present disclosure in a third mode;

fig. 4 is a schematic structural diagram of an energy storage system in a fourth mode according to an embodiment of the present application.

Reference numerals:

the energy storage system 100, the energy storage battery 110, the power electronic device 120, the second heat exchange path 150, the first pump 160;

a heat exchange circulation loop 130, a compressor 131, a first heat exchanger 132, a second heat exchanger 133, a throttle device 134;

a first heat exchanging path 140, a heater 141, and a second pump 142;

a third heat exchanging path 170, a first radiator 171, and a second radiator 172;

valve block 8, first port 81, second port 82, third port 83, fourth port 84, fifth port 85, sixth port 86, seventh port 87, eighth port 88, ninth port 89, tenth port 90.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

The present application discloses a thermal management system for an energy storage system 100.

A thermal management system of the energy storage system 100 according to an embodiment of the present application is described below with reference to fig. 1-4.

In some embodiments, as shown in fig. 1-4, an energy storage system 100 includes an energy storage cell 110 and a power electronics device 120, the thermal management system comprising: the heat exchange circulation loop 130, the first heat exchange path 140, the second heat exchange path 150, the third heat exchange path 170, the first pump 160 and the valve group 8.

The first path of the first heat exchanger 132 is communicated with the heat exchange circulation loop 130, the second heat exchanger 133 is an air-cooled heat exchanger, and the second heat exchanger 133 is communicated with the heat exchange circulation loop 130.

The heat exchange circulation loop 130 may be used to help the heat exchange portion of the energy storage battery 110 or the heat exchange portion of the power electronic device 120 to dissipate heat, and the heat exchange mode of the heat exchange circulation loop 130 may be fluorine cooling heat exchange.

As shown in fig. 1-4, the heat exchange circuit 130 may include a compressor 131, a first pass of a first heat exchanger 132, a second heat exchanger 133, and a throttle device 134.

The refrigeration cycle of the refrigeration module can be realized by the following modes: the low-temperature liquid refrigerant flows through the first path of the first heat exchanger 132, the low-temperature liquid refrigerant absorbs heat and is vaporized into a gaseous refrigerant in the first heat exchanger 132, the gaseous refrigerant is compressed into a high-temperature high-pressure gaseous refrigerant through the compressor 131, the high-temperature high-pressure gaseous refrigerant is liquefied into a medium-temperature high-pressure liquid refrigerant through heat release of the condenser, the medium-temperature high-pressure liquid refrigerant is changed into a low-temperature low-pressure liquid refrigerant through the throttling device 134, and in the refrigeration cycle, the first heat exchanger 132 is an evaporator, and the second heat exchanger 133 is a condenser.

It will be appreciated that, as shown in fig. 1 to 4, the first heat exchanger 132 is simultaneously in communication with the heat exchange circulation loop 130 and the first heat exchange passage 140, i.e., the heat exchange circulation loop 130 and the first heat exchange passage 140 exchange heat together, the second heat exchanger 133 is only in communication with the heat exchange circulation loop 130 and is not in independent heat exchange with the second heat exchange passage 150, i.e., the heat exchange circulation loop 130 and the second heat exchange passage 150, and the second heat exchanger 133 is provided with a fan for independent heat dissipation thereof.

The second path of the first heat exchanger 132 and the heat exchanging portion of the energy storage battery 110 are both in communication with the first heat exchanging path 140.

The first heat exchange passage 140 may be used to help the heat exchange portion of the energy storage battery 110 dissipate heat, and the pipe of the first heat exchange passage 140 may be filled with a cooling liquid.

In this embodiment, the low-temperature cooling liquid may pass through the heat exchanging portion of the energy storage battery 110, the low-temperature cooling liquid may absorb the heat of the energy storage battery 110 and then increase in temperature, and then the cooling liquid flows through the first heat exchanger 132 to transfer the heat to the refrigerant in the heat exchanging circulation loop 130, so that the temperature of the cooling liquid in the first heat exchanging passage 140 decreases.

The heat exchanging portion of the power electronics device 120 communicates with the second heat exchanging path 150.

The second heat exchange path 150 may be used to help the heat exchange portion of the energy storage battery 110 dissipate heat, and the pipe of the second heat exchange path 150 may be filled with a cooling liquid.

The power electronics 120 may include, but are not limited to, a power conversion component, a communication module, a detection module, or an interaction module, etc., such as, in some embodiments, the power electronics 120 is a power conversion component.

The third heat exchange passage 170 has a radiator.

The third heat exchange passage 170 may be used to assist the heat exchange portion of the energy storage battery 110 or the heat exchange portion of the power electronic device 120 to dissipate heat, and the heat exchange manner of the third heat exchange passage 170 may be air cooling heat exchange.

The first pump 160 may be a driving pump, and the first pump 160 may drive the coolant to circulate in the pipe to complete the heat exchange cycle.

The valve block 8 is connected between the first pump 160, the first to third heat exchange passages 170, and the valve block 8 is used to selectively connect or disconnect the first pump 160, the first to third heat exchange passages 170.

In practical implementation, as shown in fig. 1 to fig. 4, the thermal management system may include a plurality of working modes, in which each working mode has a difference in a temperature control manner between the heat exchange portion of the energy storage battery 110 and the heat exchange portion of the power electronic device 120, specifically, when the temperature of the system working environment is higher, the heat exchange portion of the energy storage battery 110 may perform fluorine-cooled heat exchange by using the heat exchange circulation loop 130, and the heat exchange portion of the power electronic device 120 may perform air-cooled heat exchange by using the third heat exchange channel 170; or when the temperature of the system working environment is moderate, the heat exchange part of the energy storage battery 110 can perform fluorine cooling heat exchange and air cooling heat exchange by utilizing the heat exchange circulation loop 130 and the third heat exchange passage 170, and the heat exchange part of the power electronic equipment 120 can perform air cooling heat exchange by utilizing the third heat exchange passage 170; or, when the temperature of the system working environment is low, the heat exchange part of the energy storage battery 110 can be preheated by using the heat emitted by the power electronic device 120 and other heat sources; or, when the system is kept stationary after working, the heat exchange portion of the energy storage battery 110 may perform air cooling heat exchange by using the third heat exchange passage 170, and the heat exchange portion of the power electronic device 120 may be kept stationary for heat dissipation.

According to the thermal management system of the energy storage system 100, through the arrangement of the valve group 8, the temperature of the energy storage battery 110 and the temperature of the power electronic equipment 120 are controlled by one system, so that the thermal management system can have more working modes according to different environment temperatures, the overall volume of the thermal management system is reduced, and meanwhile, the operation energy efficiency of the system is improved.

In some embodiments, as shown in fig. 1-4, valve block 8 may have first through eighth ports 88, two ends of first pump 160 may be connected to first and second ports 81 and 82, respectively, two ends of second heat exchange passage 150 may be connected to third and fourth ports 83 and 84, two ends of third heat exchange passage 170 may be connected to fifth and sixth ports 85 and 86, respectively, and two ends of first heat exchange passage 140 may be connected to seventh and eighth ports 87 and 88, respectively.

It will be appreciated that, as shown in fig. 1-4, the valve block 8 may have a first port 81, a second port 82, a third port 83, a fourth port 84, a fifth port 85, a sixth port 86, a seventh port 87, and an eighth port 88, the first port 81 and the second port 82 may be connected to an inlet and an outlet of the first pump 160, respectively, the third port 83 and the fourth port 84 may be connected to an inlet and an outlet of the second heat exchanging passage 150, respectively, the fifth port 85 and the sixth port 86 may be connected to an inlet and an outlet of the third heat exchanging passage 170, respectively, and the seventh port 87 and the eighth port 88 may be connected to an inlet and an outlet of the first heat exchanging passage 140, respectively.

It should be noted that the above-mentioned various operation modes may be realized by changing the communication relationship between the first to eighth valve ports 88 of the valve block 8, in other words, the switching of the communication relationship between the first to eighth valve ports 88 may accomplish the switching of the various operation modes.

According to the thermal management system of the energy storage system 100, through the arrangement of the first valve port 81 to the eighth valve port 88 on the valve bank 8, the valve bank is connected with the first pump 160, the second heat exchange passage 150, the third heat exchange passage 170 and the first heat exchange passage 140, the overall flat cable layout is simplified, and the integration level of the whole system is improved.

In some embodiments, as shown in fig. 1-4, the third heat exchange path 170 may have a first radiator 171 and a second radiator 171, the valve block 8 may further have a ninth valve port 89 and a tenth valve port 90, both ends of the first radiator 171 may be connected to the fifth valve port 85 and the ninth valve port 89 of the valve block 8, respectively, and both ends of the second radiator 172 may be connected to the tenth valve port 90 and the sixth valve port 86 of the valve block 8, respectively.

In this embodiment, as shown in fig. 1-4, the first radiator 171 may be in communication with the first pump 160, the second heat exchange passage 150, the second radiator 172, and the first heat exchange passage 140 through the fifth valve port 85 and the ninth valve port 89, and the second radiator 172 may be in communication with the first pump 160, the second heat exchange passage 150, the first radiator 171, and the first heat exchange passage 140 through the tenth valve port 90 and the sixth valve port 86.

In actual implementation, as shown in fig. 1 to 4, in some operation modes, the first radiator 171 and the second radiator 171 may be communicated as a whole to perform heat dissipation operation as the third heat exchange passage 170; in other modes of operation, the first heat sink 171 and the second heat sink 171 may be separated as separate entities for separate heat dissipating operations.

According to the thermal management system of the energy storage system 100, through the arrangement of the first radiator 171 and the second radiator 171 and the corresponding arrangement of the ninth valve port 89 and the tenth valve port 90, the first radiator 171 and the second radiator 171 are separated and independent in structural arrangement, and the heat is dissipated as a whole or as an independent individual selectively according to different working modes, so that the heat dissipation force of the whole thermal management system is enhanced, and meanwhile, the diversity of the working modes and the flexibility of the system are ensured.

In some embodiments, as shown in fig. 1, the thermal management system may have a first mode of operation in which the first heat exchange passage 140 may be closed and the first pump 160, the second heat exchange passage 150, and the third heat exchange passage 170 may be in communication.

As shown in fig. 1, the first port 81 of the valve block 8 may be in communication with the sixth port 86 of the valve block 8, the second port 82 of the valve block 8 may be in communication with the third port 83 of the valve block 8, the fourth port 84 of the valve block 8 may be in communication with the fifth port 85 of the valve block 8, and the seventh port 87 of the valve block 8 may be in communication with the eighth port 88 of the valve block 8.

In other words, the first heat exchange path 140 is closed to form a loop, the heat exchange circulation loop 130 can dissipate heat from the first heat exchange path 140 through the first heat exchanger 132, the second heat exchange path 150, the third heat exchange path 170 and the first pump 160 are sequentially connected end to form a loop, and the third heat exchange path 170 can dissipate heat from the second heat exchange path 150 through the radiator.

In the first operation mode, that is, in the case where the temperature of the system operating environment is higher, considering that the power electronic device 120 is higher in tolerance temperature than the energy storage battery 110, and the heat dissipation effect of the fluorine-cooled heat exchange is better than that of the air-cooled heat exchange, the energy storage battery 110 may adopt the fluorine-cooled heat exchange, and the power electronic device 120 may adopt the air-cooled heat exchange.

In actual implementation, in the first operation mode, the heat dissipation process of the energy storage battery 110 is as follows: the low-temperature cooling liquid radiates heat for the energy storage battery 110 through the heat exchange part of the energy storage battery 110, the temperature of the low-temperature cooling liquid rises after absorbing the heat, then the low-temperature cooling liquid flows through the second path of the first heat exchanger 132, the heat is transferred to the refrigerant in the heat exchange circulation loop 130 through the first heat exchanger 132, the temperature of the cooling liquid decreases after releasing the heat, and finally the cooling liquid flows back to the heat exchange part of the energy storage battery 110 again.

The heat dissipation process of the power electronic device 120 is as follows: the first pump 160 drives the cooling liquid to flow in the pipeline, so that the low-temperature cooling liquid flows through the heat exchange part of the power electronic device 120 of the second heat exchange channel 150 to dissipate heat of the power electronic device 120, the temperature of the low-temperature cooling liquid rises after absorbing the heat, then the low-temperature cooling liquid flows through the radiator of the third heat exchange channel 170 to dissipate the heat to the air, the temperature of the cooling liquid decreases after releasing the heat, and finally the cooling liquid flows back to the heat exchange part of the power electronic device 120 of the second heat exchange channel 150 again.

According to the thermal management system of the energy storage system 100 provided by the embodiment of the application, through the design of the communication relation between the first valve port 88 and the eighth valve port 88 of the valve group 8 in the first working mode, the heat dissipation requirements of the energy storage battery 110 and the power electronic equipment 120 are met simultaneously in a high-temperature working environment, and a series of domino effects of thermal runaway of the system due to overtemperature are reduced.

In some embodiments, as shown in fig. 1, the third heat exchange path 170 may have a first heat sink 171 and a second heat sink 172, and in the first operation mode, the first heat exchange path 140 may be closed, and the first pump 160, the second heat exchange path 150, the first heat sink 171, and the second heat sink 172 may be in communication.

As shown in fig. 1, the valve block 8 may further have a ninth valve port 89 and a tenth valve port 90, both ends of the first radiator 171 may be connected to the fifth valve port 85 and the ninth valve port 89 of the valve block 8, respectively, both ends of the second radiator 172 may be connected to the tenth valve port 90 and the sixth valve port 86 of the valve block 8, respectively, the first valve port 81 of the valve block 8 may be communicated with the sixth valve port 86 of the valve block 8, the second valve port 82 of the valve block 8 may be communicated with the third valve port 83 of the valve block 8, the fourth valve port 84 of the valve block 8 may be communicated with the fifth valve port 85 of the valve block 8, and the seventh valve port 87 of the valve block 8 may be communicated with the eighth valve port 88 of the valve block 8; the ninth port 89 of the valve block 8 may be in communication with the tenth port 90 of the valve block 8.

As shown in fig. 1, in the first operation mode, the first heat sink 171 and the second heat sink 172 are connected in series and perform heat dissipation for the heat exchanging portion of the power electronic device 120 of the second heat dissipation path.

In actual implementation, in the first operation mode, the heat dissipation process of the energy storage battery 110 is as follows: the low-temperature cooling liquid radiates heat for the energy storage battery 110 through the heat exchange part of the energy storage battery 110, the temperature of the low-temperature cooling liquid rises after absorbing the heat, then the low-temperature cooling liquid flows through the second path of the first heat exchanger 132, the heat is transferred to the refrigerant in the heat exchange circulation loop 130 through the first heat exchanger 132, the temperature of the cooling liquid decreases after releasing the heat, and finally the cooling liquid flows back to the heat exchange part of the energy storage battery 110 again.

The heat dissipation process of the power electronic device 120 is as follows: the first pump 160 drives the coolant to flow in the pipe, so that the low-temperature coolant flows through the heat exchange portion of the power electronic device 120 of the second heat exchange passage 150 to dissipate heat of the power electronic device 120, the low-temperature coolant absorbs heat and then has a temperature rise, then flows through the first radiator 171 of the third heat exchange passage 170 to exchange heat with the external air for the first time, then flows through the second radiator 172 of the third heat exchange passage 170 to exchange heat with the external air for the second time, the temperature of the coolant is reduced after the coolant releases heat, and finally flows back to the heat exchange portion of the power electronic device 120 of the second heat exchange passage 150 again.

According to the heat management system of the energy storage system 100, through the arrangement of the first radiator 171 and the second radiator 172 in the third heat exchange passage 170 in the first working mode, the heat dissipation effect of the radiator on the power electronic equipment 120 is obviously improved by utilizing twice air cooling heat exchange, meanwhile, the heat exchange circulation loop 130 only exchanges heat for the first heat exchange passage 140 and is independently separated from the second heat exchange passage 150 for heat exchange, and the heat dissipation pressure of the whole heat management system in a high-temperature working environment is relieved.

In some embodiments, as shown in fig. 2, the third heat exchange path 170 may have a first heat sink 171 and a second heat sink 172,

the thermal management system may have a second mode of operation in which the first heat exchange passage 140 and the second heat sink 172 may be in communication, and the first pump 160, the second heat exchange passage 150, and the first heat sink 171 may be in communication.

As shown in fig. 2, the valve block 8 may further have a ninth valve port 89 and a tenth valve port 90, both ends of the first radiator 171 may be connected to the fifth valve port 85 and the ninth valve port 89 of the valve block 8, respectively, both ends of the second radiator 172 may be connected to the tenth valve port 90 and the sixth valve port 86 of the valve block 8, the first valve port 81 of the valve block 8 may be connected to the ninth valve port 89 of the valve block 8, the second valve port 82 of the valve block 8 may be connected to the third valve port 83 of the valve block 8, the fourth valve port 84 of the valve block 8 may be connected to the fifth valve port 85 of the valve block 8, the tenth valve port 90 of the valve block 8 may be connected to the eighth valve port 88 of the valve block 8, and the sixth valve port 86 of the valve block 8 may be connected to the seventh valve port 87 of the valve block 8.

In other words, as shown in fig. 2, the first heat exchange path 140 and the second heat radiator 172 are sequentially connected end to form a loop, the heat exchange circulation loop 130 can radiate heat from the first heat exchange path 140 through the first heat exchanger 132, meanwhile, the second heat radiator 172 can radiate heat from the first heat exchange path 140, the second heat exchange path 150, the first heat radiator 171 and the first pump 160 are sequentially connected end to form a loop, and the first heat radiator 171 can radiate heat from the second heat exchange path 150.

In actual implementation, in the second operation mode, the heat dissipation process of the energy storage battery 110 is as follows: the low-temperature cooling liquid passes through the heat exchange part of the energy storage battery 110 to dissipate heat of the energy storage battery 110, the temperature of the low-temperature cooling liquid rises after absorbing heat, then the low-temperature cooling liquid flows through the second path of the first heat exchanger 132, the heat is transferred to the refrigerant in the heat exchange circulation loop 130 through the first heat exchanger 132, the temperature of the cooling liquid decreases after releasing heat, then the cooling liquid flows through the second heat radiator 172 to exchange heat with external air, the temperature of the cooling liquid decreases again after releasing heat, and finally the cooling liquid flows back to the heat exchange part of the energy storage battery 110 again.

The heat dissipation process of the power electronic device 120 is as follows: the first pump 160 drives the coolant to flow in the pipe, so that the low-temperature coolant flows through the heat exchange portion of the power electronic device 120 of the second heat exchange channel 150 to dissipate heat of the power electronic device 120, the low-temperature coolant absorbs heat and then increases in temperature, then flows through the first radiator 171 to dissipate heat to air, the temperature decreases after the coolant releases heat, and finally returns to the heat exchange portion of the power electronic device 120 of the second heat exchange channel 150 again.

According to the thermal management system of the energy storage system 100 provided by the embodiment of the application, through the design of the communication relation between the first valve port 88 and the eighth valve port 88 of the valve group 8 in the second working mode, the heat dissipation requirements of the energy storage battery 110 and the power electronic equipment 120 are met simultaneously in a moderate temperature working environment.

In some embodiments, as shown in fig. 2, in the second mode of operation, both the heat exchange circuit and the second radiator may be in operation.

In this embodiment, in the second operation mode, that is, in the case where the temperature of the system operating environment is moderate, the heat exchange circulation loop 130 may operate at a reduced frequency, and the energy storage battery 110 may use low-frequency fluorine-cooled heat exchange in combination with air-cooled heat exchange, considering that the system heat dissipation pressure is smaller and the power electronic device 120 is tolerant to a higher temperature than the energy storage battery 110 at this time, and the power electronic device 120 may use air-cooled heat exchange.

It should be noted that, the heat dissipation capacity of the second heat sink 172 is relatively strong, so that the heat exchange circulation loop 130 can be supplemented with cold energy, and particularly, when the ambient temperature is further reduced, the heat exchange circulation loop 130 can be completely closed, that is, the first heat exchange passage 140 can completely rely on the second heat exchanger 133 to dissipate heat.

According to the heat management system of the energy storage system 100, the heat exchange circulation loop 130 and the second radiator 172 are designed for radiating heat for the first heat exchange channel 140, and the second radiator 172 bears part of heat radiation tasks, so that the heat exchange circulation loop 130 can operate at a reduced frequency, energy consumption of fluorine cooling heat radiation is reduced, and electric quantity is saved.

In some embodiments, as shown in fig. 1-4, the first heat exchange path 140 may have a heater 141 and a second pump 142.

The heater 141 may be used to preheat the energy storage cell 110, the second pump 142 may be a driving pump, and the second pump 142 may drive the coolant to circulate in the pipe to complete the heat exchange cycle.

In this embodiment, as shown in fig. 1 to 4, when the thermal management system is in the first operation mode or the second operation mode, the heater 141 of the first heat exchanging passage 140 is in a closed state, and the second pump 142 of the first heat exchanging passage 140 is in an open state, thereby driving the cooling liquid in the pipe to continuously circulate and exchange heat.

According to the thermal management system of the energy storage system 100, through the arrangement of the heater 141 and the second pump 142, heat supply to the energy storage battery 110 and driving of cooling liquid in the first heat exchange passage 140 are achieved, so that the energy storage battery 110 can adapt to a high-temperature working environment and a low-temperature working environment, and the working performance of the energy storage battery 110 is optimized.

In some embodiments, as shown in fig. 3, the thermal management system may have a third mode of operation in which the first heat exchange pathway 140 and the second heat exchange pathway 150 may be in communication, the first pump 160 may be disconnected, the third heat exchange pathway 170 may be disconnected, and the heater 141 may be in operation.

It will be appreciated that, as shown in fig. 3, the third valve port 83 of the valve bank 8 may be in communication with the eighth valve port 88 of the valve bank 8, the fourth valve port 84 of the valve bank 8 may be in communication with the seventh valve port 87 of the valve bank 8, the other valve ports may be disconnected, the first heat exchanging channel 140 and the second heat exchanging channel 150 are sequentially connected end to form a loop, the third heat exchanging channel 170 and the first pump 160 are shielded, the heat exchanging circulation loop 130 is in a stop state, and the heater 141 of the first heat exchanging channel 140 and the power electronic device 120 may cooperate to supply heat to the energy storage battery 110.

In the third operation mode, that is, in consideration of the fact that the power electronic device 120 emits a large amount of heat when operating in a low temperature environment, the energy storage battery 110 may be preheated by a combination of the heat supplied from the heater 141 and the heat emitted from the power electronic device 120, and the third heat exchange passage 170 and the first pump 160 may be selectively disconnected in this operation mode due to the problems of the water pump overpressure and the heat leakage from the radiator.

In actual implementation, in the third operation mode, the warm-up process of the energy storage battery 110 is as follows: the second pump 142 drives the cooling liquid to flow in the pipeline, the cooling liquid flows through the heat exchange part of the power electronic device 120 of the second heat exchange passage 150 to absorb heat and then to rise in temperature, then the cooling liquid flows through the heater 141 of the first heat exchange passage 140 again, at this time, the heater 141 is in an operating state, the temperature rises again after the cooling liquid absorbs heat, then the high-temperature cooling liquid flows through the heat exchange part of the energy storage battery 110 to supply heat to the energy storage battery 110, the temperature drops after the cooling liquid releases heat, and finally the cooling liquid flows back to the heat exchange part of the power electronic device 120 of the second heat exchange passage 150 again.

According to the thermal management system of the energy storage system 100, through the design of the communication relation between the first valve port 88 and the eighth valve port 88 of the valve group 8 in the third working mode, waste heat of the power electronic equipment 120 is utilized to combine with the action of the heater 141 in the low-temperature working environment, so that the preheating requirement of the energy storage battery 110 is met, and the preheating efficiency is improved.

In some embodiments, as shown in fig. 4, the thermal management system may have a fourth mode of operation in which the first heat exchange pathway 140 and the third heat exchange pathway 170 may be in communication, the first pump 170 may be disconnected, and the second heat exchange pathway 150 may be disconnected.

It will be appreciated that, as shown in fig. 4, the fifth valve port 85 of the valve bank 8 may be communicated with the eighth valve port 88 of the valve bank 8, the sixth valve port 86 of the valve bank 8 may be communicated with the seventh valve port 87 of the valve bank 8, the other valve ports may be disconnected, the first heat exchanging passage 140 and the third heat exchanging passage 170 are sequentially connected end to form a loop, the second heat exchanging passage 150 and the first pump 160 are shielded, the heat exchanging circulation loop 130 is in a stop state, and the third heat exchanging passage 170 may dissipate heat from the first heat exchanging passage 140 through the radiator.

In the fourth operation mode, that is, in the case of standing after the system works, the fact that the heat dissipation pressure of the system is smaller at this time, and the power conversion unit has lower specific heat capacity can automatically complete standing and cooling without additional heat dissipation configuration is considered, so that the energy storage battery 110 can adopt air cooling heat exchange, and the power electronic equipment 120 can adopt standing and cooling.

In actual implementation, in the fourth operation mode, the heat dissipation process of the energy storage battery 110 is as follows: the second pump 142 drives the coolant to flow in the pipeline, the low-temperature coolant radiates heat to the energy storage battery 110 through the heat exchange part of the energy storage battery 110, the temperature of the low-temperature coolant rises after absorbing the heat, then the coolant flows through the radiator of the third heat exchange passage 170 to exchange heat with the external air, the temperature of the coolant decreases after releasing heat, and finally the coolant flows back to the heat exchange part of the energy storage battery 110 again.

The heat dissipation process of the power electronic device 120 is as follows: the heat exchange portion of the power electronic device 120 is disconnected from other components, and in the standing process, the heat exchange portion of the power electronic device 120 slowly releases heat so as to gradually complete heat dissipation and cooling.

According to the heat management system of the energy storage system 100, through the design of the communication relation between the first valve port 88 and the eighth valve port 88 of the valve group 8 in the fourth working mode, the heat dissipation requirements of the energy storage battery 110 and the power electronic equipment 120 are met under the condition that the system is kept still after working, and the energy waste caused by the fact that the refrigeration cycle is not closed in time after the system stops working is avoided, so that the economical efficiency of the whole system is improved.

In some embodiments, as shown in fig. 4, the third heat exchange path 170 may have a first heat sink 171 and a second heat sink 172,

in the fourth operation mode, the first heat exchange path 140, the first radiator 171, and the second radiator 172 may be connected, the first pump 160 may be turned off, and the second heat exchange path 150 may be turned off.

As shown in fig. 4, the valve block 8 may further have a ninth valve port 89 and a tenth valve port 90, both ends of the first radiator 171 may be connected to the fifth valve port 85 and the ninth valve port 89 of the valve block 8, both ends of the second radiator 172 may be connected to the tenth valve port 90 and the sixth valve port 86 of the valve block 8, the fifth valve port 85 of the valve block 8 may be communicated with the eighth valve port 88 of the valve block 8, the sixth valve port 86 of the valve block 8 may be communicated with the seventh valve port 87 of the valve block 8, the ninth valve port 89 of the valve block 8 may be communicated with the tenth valve port 90 of the valve block 8, and the other valve ports may be disconnected.

As shown in fig. 4, in the fourth operation mode, the first heat sink 171 and the second heat sink 172 are connected in series and perform heat dissipation for the heat exchanging portion of the energy storage battery 110 of the first heat dissipation path.

In actual implementation, in the fourth operation mode, the heat dissipation process of the energy storage battery 110 is as follows: the second pump 142 drives the coolant to flow in the pipe, the low-temperature coolant radiates heat to the energy storage battery 110 through the heat exchanging part of the energy storage battery 110, the temperature of the low-temperature coolant rises after absorbing the heat, then the coolant flows through the first radiator 171 of the third heat exchanging passage 170 to exchange heat with the external air for the first time, then flows through the second radiator 172 of the third heat exchanging passage 170 to exchange heat with the external air for the second time, the temperature of the coolant decreases after radiating heat, and finally returns to the heat exchanging part of the energy storage battery 110 again.

The heat dissipation process of the power electronic device 120 is as follows: the heat exchange portion of the power electronic device 120 is disconnected from other components, and in the standing process, the heat exchange portion of the power electronic device 120 slowly releases heat so as to gradually complete heat dissipation and cooling.

According to the thermal management system of the energy storage system 100, through the arrangement of the first radiator 171 and the second radiator 172 in the third heat exchange passage 170 in the fourth working mode, heat exchange is performed by air cooling twice, so that the heat dissipation effect of the radiator on the energy storage battery 110 is obviously improved, and the heat dissipation efficiency of the system during standing after working is improved.

The present application also discloses an energy storage system 100.

In some embodiments, as shown in fig. 1-4, the energy storage system 100 includes: such as any of the thermal management systems described above, the energy storage battery 110, and the power electronics 120

The thermal management system is electrically connected to the energy storage battery 110 and the power electronics 120.

In practical implementation, the thermal management system may switch between different operation modes according to different operation environment temperatures, and may control the temperatures of the energy storage battery 110 and the power electronic device 120 simultaneously by using one temperature control system, specifically, when the temperature of the system operation environment is higher, the thermal management system may switch between the first operation mode to control the temperatures of the energy storage battery 110 and the power electronic device 120; alternatively, when the temperature of the system operating environment is moderate, the thermal management system may switch the second mode of operation to control the temperature of the energy storage battery 110 and the power electronics 120; alternatively, when the temperature of the system operating environment is low, the thermal management system may switch the third operating mode to control the temperature of the energy storage battery 110 and the power electronics 120; alternatively, the thermal management system may switch the fourth mode of operation to control the temperature of the energy storage battery 110 and the power electronics 120 when the system is stationary after operation.

According to the energy storage system 100 provided by the embodiment of the application, through the arrangement of the thermal management system, the scheme of adjusting temperature control of the system according to the external environment and the working state of the device is realized, the occupied space of the energy storage system 100 is greatly reduced, the power consumption is reduced, and the energy is saved.

The present application also discloses a photovoltaic energy storage system 100.

In some embodiments, the photovoltaic energy storage system 100 includes: a photovoltaic power generation system and an energy storage system 100 as in the above;

the photovoltaic power generation system is used to power the energy storage system 100.

The photovoltaic power generation system may include a photovoltaic module and an inverter unit, where the energy storage battery 110 in the energy storage system 100 may be connected to the dc power output by the photovoltaic module, and other power utilization modules in the energy storage system 100 may be connected to the ac power output by the inverter unit.

According to the photovoltaic energy storage system 100 provided by the embodiment of the application, through the arrangement of the energy storage system 100, the volume of the whole photovoltaic energy storage system 100 is reduced, so that the overall structural design is simplified; meanwhile, the power loss during the operation of the system is reduced, so that the purpose of energy conservation is achieved, and the photovoltaic power generation efficiency is further improved.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the description of the present application, "a first feature", "a second feature" may include one or more of the features.

In the description of the present application, the meaning of "plurality" is two or more.

In the description of this application, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact by another feature therebetween.

In the description of this application, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. A thermal management system for an energy storage system, the energy storage system comprising an energy storage battery and power electronics, the thermal management system comprising:

the first path of the first heat exchanger is communicated with the heat exchange circulation loop, the second heat exchanger is an air cooling heat exchanger, and the second heat exchanger is communicated with the heat exchange circulation loop;

the second path of the first heat exchanger and the heat exchange part of the energy storage battery are both communicated with the first heat exchange path;

the heat exchange part of the power electronic equipment is communicated with the second heat exchange passage;

a third heat exchange path having a radiator;

a first pump;

and the valve group is connected between the first pump and the first to third heat exchange passages and used for selectively connecting or disconnecting the first pump and the first to third heat exchange passages.

2. The thermal management system of an energy storage system of claim 1, wherein the valve block has first through eighth ports, two ends of the first pump are connected to the first and second ports, respectively, two ends of the second heat exchange path are connected to the third and fourth ports, respectively, two ends of the third heat exchange path are connected to the fifth and sixth ports, respectively, and two ends of the first heat exchange path are connected to the seventh and eighth ports, respectively.

3. The thermal management system of an energy storage system of claim 2, wherein the third heat exchange path has a first radiator and a second radiator, the valve block further has a ninth port and a tenth port, two ends of the first radiator are connected to the fifth port and the ninth port of the valve block, respectively, and two ends of the second radiator are connected to the tenth port and the sixth port of the valve block, respectively.

4. The thermal management system of an energy storage system of claim 1, wherein the thermal management system has a first mode of operation in which the first heat exchange pathway is closed and the first pump, the second heat exchange pathway, and the third heat exchange pathway are in communication.

5. The thermal management system of an energy storage system of claim 4, wherein said third heat exchange path has a first heat sink and a second heat sink, said first heat exchange path being closed, said first pump, said second heat exchange path, said first heat sink and said second heat sink being in communication in said first mode of operation.

6. The thermal management system of an energy storage system of claim 1, wherein the third heat exchange path has a first heat sink and a second heat sink, the thermal management system having a second mode of operation in which the first heat exchange path and the second heat sink are in communication and the first pump, the second heat exchange path, and the first heat sink are in communication.

7. The thermal management system of an energy storage system of claim 6, wherein in said second mode of operation, said heat exchange circuit and said second radiator are both in operation.

8. The thermal management system of an energy storage system of claim 1, wherein the first heat exchange pathway has a heater and a second pump.

9. The thermal management system of an energy storage system of claim 8, wherein the thermal management system has a third mode of operation in which the first heat exchange pathway and the second heat exchange pathway are in communication, the first pump is disconnected, the third heat exchange pathway is disconnected, and the heater is in operation.

10. The thermal management system of an energy storage system of claim 1, wherein the thermal management system has a fourth mode of operation in which the first heat exchange passage and the third heat exchange passage are in communication, the first pump is off, and the second heat exchange passage is off.

11. The thermal management system of an energy storage system of claim 10, wherein the third heat exchange path has a first heat sink and a second heat sink, and in the fourth mode of operation, the first heat exchange path, the first heat sink, and the second heat sink are in communication, the first pump is off, and the second heat exchange path is off.

12. An energy storage system, comprising:

an energy storage battery and power electronics;

the thermal management system of any of claims 1-11, electrically connected to the energy storage battery and power electronics.

13. A photovoltaic energy storage system, comprising:

the energy storage system of claim 12;

and the photovoltaic power generation system is used for supplying power to the energy storage system.