CN120916322A - Energy storage converter, energy storage system, temperature control method and electric equipment - Google Patents

Abstract

The embodiment of the application relates to the field of energy storage, and provides an energy storage converter, an energy storage system, a temperature control method and electric equipment. The energy storage converter comprises a power circuit board, a heating power module, a liquid cooling tank, other functional modules and a cooling fan, wherein the heating power module is arranged at the bottom of the power circuit board and comprises a power semiconductor device, the liquid cooling tank is used for containing cooling liquid, the heating power module is immersed in the cooling liquid, the other functional modules are arranged above the power circuit board and comprise an inverter, a rectifier, a transformer and a capacitor, and the cooling fan is arranged above the power circuit board and is used for blowing hot air formed above the power circuit board. The heating power module below the power circuit board is immersed in the cooling liquid, the radiating fan is used for radiating heat above the power circuit board, and the air cooling and the liquid cooling are combined for radiating heat of the energy storage converter, so that the problem that the radiating effect is poor in the prior art is solved.

Description

Energy storage converter, energy storage system, temperature control method and electric equipment

Technical Field

The application relates to the field of energy storage, in particular to an energy storage converter, an energy storage system, a temperature control method and electric equipment.

Background

An energy storage converter (Power Conversion System, abbreviated as PCS), also known as an energy storage inverter, is one of the core devices in an energy storage system. The energy storage converter includes power conversion components (e.g., IGBTs), control components, protection components, communication modules, heat dissipation systems (e.g., including heat sinks, fans, or liquid cooling plates), and the like. With the rapid development of energy storage technology, the thermal management requirements of energy storage devices are also increasing.

The power circuit board of the energy storage converter has the functions of electric energy conversion, power control and electric isolation and protection, the power circuit board is a main heat dissipation component in the energy storage device, and the power conversion component is a main heat source in the energy storage device.

In the prior art, the power board is radiated by a radiating mode of the cooling board, so that the problem of poor radiating effect exists.

Disclosure of Invention

The embodiment of the application provides an energy storage converter, an energy storage system, a temperature control method and electric equipment, which are at least beneficial to solving the problem that the heat dissipation effect is poor in the prior art by radiating a power board through a heat dissipation mode of a cooling board.

According to some embodiments of the application, an aspect of the embodiment provides an energy storage converter, which comprises a power circuit board, a heating power module, a liquid cooling tank, other functional modules and a cooling fan, wherein the heating power module is arranged at the bottom of the power circuit board and comprises a power semiconductor device, the liquid cooling tank is used for accommodating cooling liquid, the heating power module is immersed in the cooling liquid, the other functional modules are arranged above the power circuit board and comprise an inverter, a rectifier, a transformer and a capacitor, and the cooling fan is arranged above the power circuit board and is used for blowing hot air formed above the power circuit board.

In some embodiments, the number of the liquid cooling tanks is equal to the number of the heating power modules, the liquid cooling tanks are in one-to-one correspondence with the heating power modules, and the plurality of the heating power modules are respectively immersed in the cooling liquid of the corresponding liquid cooling tanks.

In some embodiments, the number of the liquid cooling tanks is smaller than the number of the heating power modules, and at least one liquid cooling tank is immersed with a plurality of the heating power modules.

In some embodiments, the height of the liquid cooling tank is greater than the thickness of the heating power module, and the difference between the height of the liquid cooling tank and the thickness of the heating power module is less than a preset value.

In some embodiments, the liquid cooling tank further comprises a cooling liquid inlet and a cooling liquid outlet, wherein the cooling liquid inlet and the cooling liquid outlet are embedded on the tank wall of the liquid cooling tank, and the height of the cooling liquid inlet is higher than that of the cooling liquid outlet.

In some embodiments, other heating modules are further mounted on the bottom of the power circuit board, and the other heating modules are immersed in the cooling liquid.

In some embodiments, the thickness of the other heating module is smaller than the thickness of the reference heating module, and the electrical parameter value of the other heating module is equal to the electrical parameter value of the reference heating module.

According to some embodiments of the present application, another aspect of the embodiments of the present application provides an energy storage system, which includes any of the energy storage converters.

In some embodiments, the energy storage system further comprises a compressor, the compressor is located outside the energy storage converter, the compressor comprises a liquid inlet and a liquid outlet, the liquid inlet of the compressor is communicated with the cooling liquid outlet of the liquid cooling tank, and the liquid outlet of the compressor is communicated with the cooling liquid inlet of the liquid cooling tank.

In some embodiments, the energy storage system further comprises a liquid cooling pump and a heat exchanger, the liquid cooling pump pumping the cooling liquid into the heat exchanger to cool the cooling liquid absorbing heat.

According to some embodiments of the present application, another aspect of the embodiments of the present application provides an electric device, where any one of the energy storage converters is used to supply power to the electric device.

The technical scheme provided by the embodiment of the application has the advantages that the heating power module is installed and fixed at the bottom of the power circuit board, liquid cooling heat dissipation is realized by immersing the heating power module by adopting the cooling liquid in the liquid cooling groove, the heat dissipation is realized above the power circuit board by the heat dissipation fan installed above the power circuit board, and the heat dissipation modes of liquid cooling and air cooling are combined for heat dissipation of the energy storage converter, so that the problem that the heat dissipation effect is poor in the prior art for heat dissipation of the power board by the heat dissipation mode of the cooling board is solved.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, which are not to be construed as limiting the embodiments unless specifically claimed, and in order to more clearly illustrate the embodiments of the present application or the concepts of the conventional art, the drawings which are required to be used in the embodiments will be briefly described below, it will be apparent that the drawings in the following description are merely some embodiments of the present application and that other drawings may be obtained by those of ordinary skill in the art without undue burden.

Fig. 1 is a schematic structural diagram of an energy storage converter according to an embodiment of the present application;

FIG. 2 is a block diagram of an in-line package provided in accordance with an embodiment of the present application;

FIG. 3 is a block diagram of a heating power module according to an embodiment of the present application plugged into a power circuit board;

fig. 4 is a schematic diagram of a first structure of a liquid cooling tank according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a second structure of a liquid cooling tank according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a third configuration of a liquid cooling tank according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a cooling liquid inlet and a cooling liquid outlet of a liquid cooling tank according to an embodiment of the present application;

Fig. 8 is a schematic view of a first view angle structure of an energy storage converter according to an embodiment of the present application;

fig. 9 is a schematic diagram of a second view angle structure of an energy storage converter according to an embodiment of the application.

Wherein the above figures include the following reference numerals:

10. the power circuit board, 20 parts of heating power modules, 30 parts of liquid cooling tanks, 40 parts of other functional modules, 50 parts of cooling fans, 60 parts of shells, 70 parts of other heating modules, 80 parts of direct plug-in connectors, 90 parts of cooling liquid inlets, 100 parts of cooling liquid outlets.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures 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 where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, and indicates that three relationships may exist, for example, a and/or B, and may indicate that a exists, and a and B exist at the same time, and B exists. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "fixed" and the like are to be construed broadly and include, for example, fixed connection, detachable connection, or integral connection, mechanical connection, electrical connection, direct connection, indirect connection via an intermediary, communication between two elements, or interaction between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

In the drawings corresponding to the embodiments of the present application, thicknesses and areas of layers are exaggerated for better understanding and convenience of description. When an element (e.g., a layer, film, region, or substrate) is referred to as being "on" or "on" another element, it can be "directly on" the other element or be present between the two elements. Conversely, when it is described that one component is formed on or provided with another component surface, then it is meant that there is no third component between the two components. Further, when it is described that one component is "substantially" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor on a partial edge of the entire surface.

In the description of embodiments of the present application, when a certain component "includes" another component, the other component is not excluded unless otherwise stated, and the other component may be further included. In addition, when an element such as a layer, film, region, or panel is referred to as being "on/on" another element, it can be "directly on" the other element (i.e., no other element is present between the two surfaces of the other element), or another element can be present therebetween. In addition, when a layer, film, region, plate, etc., is "directly on" another element, or when a layer, film, region, plate, etc., is on the surface of another element, it means that no other element is located therebetween.

The terminology used in the description of the various described embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various embodiments described and in the appended claims, the "portion" is also intended to include the plural forms unless the context clearly indicates otherwise. Wherein the components include layers, films, regions, or plates.

As known from the background art, the prior art dissipates heat to the power board by the heat dissipation method of the cooling board, and has the problem of poor heat dissipation effect. In order to solve the problem that the heat dissipation effect is poor in the prior art by radiating the power board through the cooling board, the embodiment of the application provides an energy storage converter, an energy storage system and electric equipment.

Embodiments of the present application will be described in detail below with reference to the attached drawings. However, it will be understood by those of ordinary skill in the art that in various embodiments of the present application, numerous specific details are set forth in order to provide a thorough understanding of the present application. The claimed application may be practiced without these specific details and with various changes and modifications based on the following embodiments.

An embodiment of the present application provides an energy storage converter, as shown in fig. 1, including:

a power circuit board 10;

The power circuit board is a highly integrated electronic component, is specially designed for an energy storage converter (PCS), and has the core function of efficiently converting and managing electric energy. Circuit boards are equipped with critical power electronic components, such as IGBTs and MOSFETs, which are the main components of the heat source.

A heating power module 20, wherein the heating power module 20 is installed at the bottom of the power circuit board 10, and the heating power module 20 comprises a power semiconductor device;

The power semiconductor device is a main heating element of the power circuit board.

In addition, based on the setting of power module that generates heat installs in the bottom of power circuit board, fig. 2 is the structure diagram of straight plug-in components, fig. 3 is the structure diagram of power module that generates heat pegging graft at power circuit board, as shown in fig. 2 and 3, the bottom of power circuit board is equipped with straight plug-in components 80, and power module 20 that generates heat passes through straight plug-in components 80 to be fixed on power circuit board 10, specifically, the pin of power module 20 that generates heat peg graft on straight plug-in components 80 to make the power module that generates heat fix in the bottom of power circuit board 10, through the setting of straight plug-in components 80, simplified the connection between power module 20 that generates heat and the power circuit board 10, improved assembly efficiency. In principle, the direct insert 80 arranged at the bottom of the power circuit board 10 forms stable electrical connection and mechanical fixation between the heating power module 20 and the power circuit board 10, and ensures the normal operation of the heating power module 20 in a liquid cooling environment. In the action and effect, the technology in the embodiment simplifies the assembly process of the energy storage converter, reduces the production cost, and improves the stability and reliability of the system.

A liquid cooling tank 30, wherein the liquid cooling tank 30 accommodates a cooling liquid in which the heat generating power module 20 is immersed;

The heating power module comprises an IGBT (insulated gate bipolar transistor) and a MOSFET (metal-oxide-semiconductor field effect transistor), wherein the IGBT and the MOSFET can generate heat in a switching state, are immersed in cooling liquid, can rapidly remove the heat, and keep the device in a safe working temperature range. The electric energy conversion efficiency and stability of the energy storage converter are improved, and the heat loss is reduced.

In principle, the cooling liquid is used as a heat exchange medium, directly contacts and submerges the heating power module, and takes away heat through the liquid flow of the cooling liquid, so that the instability and inefficiency of air heat dissipation are avoided.

A further functional module 40, wherein the further functional module 40 is mounted above the power circuit board 10, and the further functional module 40 includes an inverter, a rectifier, a transformer, and a capacitor;

In addition, the cooling liquid can be fluorinated liquid or silicone oil, and the fluorinated liquid such as fluorocarbon (e.g. NovecTM series liquid) has the characteristics of low dielectric constant, incombustibility, non-toxicity, environmental protection and the like, is very suitable for directly immersing electronic components, can effectively take away heat without damaging the components, and can not cause circuit faults due to the non-conductive property. Silicone oil is a liquid with good insulation, high thermal stability and chemical stability, is generally used in occasions requiring high insulation, and is suitable for directly immersing heating elements. Silicone oil is not easily evaporated and has good compatibility with most plastics and rubber materials.

By selecting the fluoridized liquid or the silicone oil as the cooling liquid, the high efficiency and the safety of the liquid cooling system are ensured by utilizing the excellent heat conduction performance and the chemical stability of the fluoridized liquid or the silicone oil. The fluorinated liquid and the silicone oil have good thermal conductivity and insulativity in a liquid state, can effectively absorb and transfer heat, and can not damage electronic components.

And a heat radiation fan 50, wherein the heat radiation fan 50 is installed above the power circuit board 10 and is used for blowing hot air formed above the power circuit board 10.

In addition, the heat dissipation fan 50 arranged above the power circuit board 10 dissipates heat above the power circuit board 10, and the embodiment combines a liquid cooling and air cooling heat dissipation mode to dissipate heat of the energy storage converter, so as to provide heat dissipation efficiency of the energy storage converter, thereby solving the problem that the heat dissipation effect is poor in the prior art because the heat dissipation mode of the cooling plate dissipates heat of the power board. The embodiment obviously improves the thermal management capability of the energy storage converter, prolongs the service life of the power semiconductor device, and reduces the noise level when the system operates.

In addition, compared with a single-fan radiating scheme, the scheme of the application adopts liquid cooling to submerge and radiate the heating power module, thereby improving radiating efficiency, combining the liquid cooling with fan radiating, and obviously improving the thermal management capability of the energy storage converter.

In addition, compared with the scheme of cooling the fan by the cooling plate, the scheme of the application has the advantages that the cooling plate can only act on the surface of the heating power module to the heating power module, the scheme of cooling submergence is based on the scheme of cooling the heating power module to realize the complete package of the cooling liquid to the heating power module, and the cooling area of the cooling submergence scheme is cooled by the cooling plate, so that the cooling efficiency of the energy storage converter is improved by combining the cooling of the cooling plate with the cooling of the fan.

In some embodiments, the number of the liquid cooling tanks 30 is equal to the number of the heat generating power modules 20, the liquid cooling tanks 30 are in one-to-one correspondence with the heat generating power modules 20, and the plurality of heat generating power modules 20 are respectively immersed in the cooling liquid of the corresponding liquid cooling tanks 30.

According to the embodiment, by arranging the plurality of independent liquid cooling tanks, each tank corresponds to one heating power module, as shown in fig. 4, each independent liquid cooling tank 30 accommodates one heating power module 20, although each liquid cooling tank 30 is independent, the liquid cooling tanks 30 are mutually communicated through the guide plates and the partition plates to form a continuous cooling liquid flow path, the cooling liquid can uniformly cover all heating power modules through the cooperative design, the overall heat dissipation efficiency is improved, the temperature of each heating power module 20 can be collected through the built-in temperature sampling points of each heating power module 20, the flow direction and the flow velocity of the cooling liquid can be dynamically adjusted according to the heat load of different heating power modules 20, more accurate temperature control and heat dissipation management are realized, and the mutual influence among different heating power modules is avoided. The cooling liquid in each liquid cooling tank only exchanges heat with the corresponding heating power module, so that the efficiency and uniformity of heat exchange are improved. On the effect, the technology in this embodiment can effectively reduce local overheating phenomenon, and promote the stability and reliability of the whole system. In addition, the size and the shape of the liquid cooling groove can be adjusted to adapt to heating power modules of different sizes and types, and diversified heat dissipation requirements are met.

In some embodiments, the number of the liquid cooling tanks 30 is plural, and the number of the liquid cooling tanks 30 is smaller than the number of the heat generating power modules 20, and at least one of the liquid cooling tanks 30 is immersed with the plurality of the heat generating power modules 20.

In this embodiment, a plurality of independent liquid cooling tanks are provided to dissipate heat of the heating power module, so that according to the arrangement of the heating power module on the position of the power circuit board, as shown in fig. 5, at least two heating power modules 20 are immersed in the same liquid cooling tank 30 together, thereby simplifying the system structure and reducing the manufacturing cost. In principle, the common cooling liquid can circulate among the plurality of heating power modules to balance the temperature distribution of each module. The embodiment ensures the heat dissipation effect and improves the economy and practicality of the system.

In addition, in some embodiments, as shown in fig. 6, one liquid cooling tank 30 may be disposed to encapsulate all the heating power modules 20, so that the problem of heat dissipation of all the heating power modules 20 on the power circuit board 10 is solved by one liquid cooling tank 30, the structure of liquid cooling and heat dissipation of the energy storage converter is greatly simplified, the cost is reduced, and the arrangement of one liquid cooling tank 30 corresponding to all the heating power modules 20 has the advantages of simple structure and easy realization of control of circulation refrigeration.

In some embodiments, the height of the liquid cooling tank is greater than the thickness of the heating power module, and the difference between the height of the liquid cooling tank and the thickness of the heating power module is less than a preset value.

Regarding the setting of liquid cooling groove height, the height of liquid cooling groove is greater than the thickness of power module that generates heat, and the difference of the height of liquid cooling groove and the thickness of power module that generates heat is less than the default, wherein the default can be set up according to specific liquid cooling demand, for example the thickness of power module that generates heat is 0.3mm, the difference of the height of liquid cooling groove and the thickness of power module that generates heat is less than 0.3mm can, if this difference is higher than this, can lead to the height of liquid cooling groove too big, lead to the waste of liquid cooling groove material and coolant, in addition, the difference of the height of liquid cooling groove and the thickness of power module that generates heat needs to be greater than 0.2mm, if the difference is less than 0.2mm, the coolant that submergence generates heat power module becomes less, can lead to submergence the radiating efficiency of power module that generates heat worsens, through setting up the height of liquid cooling groove, ensure that the power module that generates heat is fully submergence, the excessive waste of coolant has been avoided simultaneously. In principle, the proper height of the liquid cooling tank ensures the effective contact area between the cooling liquid and the heating power module, and promotes the rapid transfer of heat. In the aspect of the action effect, the technology in the embodiment not only improves the heat dissipation efficiency, but also optimizes the overall design of the energy storage converter, so that the energy storage converter is more compact and saves energy.

In some embodiments, the liquid cooling tank 30 further includes a cooling liquid inlet and a cooling liquid outlet, both of which are embedded on the tank wall of the liquid cooling tank 30, and the height of the cooling liquid inlet is higher than the height of the cooling liquid outlet.

As shown in fig. 7, in this embodiment, by designing the inlet and outlet paths of the cooling liquid, the height of the cooling liquid inlet 90 of the liquid cooling tank 30 is higher than the height of the cooling liquid outlet 100, so that the cooling liquid enters from a high position and flows out from a low position, forming a flow direction from top to bottom, and facilitating the vertical transmission of heat. The embodiment simplifies the complexity of the liquid cooling system, reduces the maintenance cost and improves the utilization rate of the cooling liquid.

In some embodiments, as shown in fig. 8, another heat generating module 70 is further installed at the bottom of the power circuit board 10, and the other heat generating module 70 is immersed in the cooling liquid.

At the bottom of the power circuit board of the energy storage converter (PCS), besides the main power switching devices (such as IGBTs, MOSFETs, etc.), various other heating modules may be installed, and these modules also need to dissipate heat. Specifically, other heat generating modules include:

1. The inductor (Inductors) generates heat during power conversion, especially under high frequency switching and high current conditions. Immersing them in a cooling liquid can effectively reduce the temperature and avoid performance degradation caused by overheating.

2. Resistors (Resistors) in certain circuit designs, the resistors also generate significant heat, especially in situations where energy consumption is significant. By submerged cooling, it is ensured that these resistors still operate stably at high temperatures.

3. The driving circuit is responsible for controlling the opening and closing of the power switch device and also generates a small amount of heat. Immersing this portion of the circuit in a cooling fluid may improve its operational stability and longevity.

DC/DC converter is usually integrated in PCS for regulating DC voltage to adapt to different working conditions. These converters generate heat during operation, requiring efficient heat dissipation.

5. The buffer circuit is used for absorbing voltage spikes generated in the switching moment and also generates certain heat. Immersing this portion of the circuit in a cooling fluid may improve its heat dissipation capability and operational reliability.

6. The capacitor Capacitors is designed to generate less heat, but may also generate heat in certain high-intensity modes of operation, such as fast charge and discharge, and high fluctuating currents. Immersing in the cooling fluid may maintain the capacitor at a lower operating temperature.

7. Relays or contactors in the control circuit of the PCS, the relays or contactors are responsible for the switching on and off of the circuit, which also generate heat during operation, especially when operating frequently. Immersing these components in a cooling fluid may improve their durability and safety.

According to the embodiment, other heating modules at the bottom of the power circuit board are immersed in the cooling liquid, so that the overall heat dissipation of the whole circuit board is realized, and the overall heat management efficiency is improved. In principle, the cooling liquid covers all the heating sources to form a closed heat exchange environment, so that the uniformity and the efficiency of heat dissipation are improved. The technology in the embodiment obviously improves the heat dissipation performance of the energy storage converter, reduces the thermal stress and prolongs the service life of equipment.

In some embodiments, the thickness of the other heating module is smaller than the thickness of the reference heating module, and the electrical parameter value of the other heating module is equal to the electrical parameter value of the reference heating module.

The other heating modules are designed to be thinner than the normal heating module, and meanwhile the same electric parameter value is kept, so that the other heating modules can be integrated at the bottom of the power circuit board, and the cooling liquid in the liquid cooling tank is used for carrying out submerged heat dissipation on the other heating modules, so that the cooling system is an effective strategy for optimizing a heat dissipation scheme of the other heating modules, and particularly in a submerged cooling system. This design may offer several significant advantages:

1. The heat dissipation efficiency is enhanced-thinner heat generating modules mean shorter heat conduction paths, which can reduce thermal resistance, thereby transferring heat to the coolant more quickly. In an immersed system, the thinner the module is in direct contact with the cooling liquid, the better the heat dissipation effect is.

2. The thin design contributes to saving the internal space, which is important for miniaturization and weight saving of the device. In limited space, can install more modules or subassembly, promote the wholeness ability and the efficiency of equipment.

3. The cost is optimized, and the production cost of the module can be reduced by reducing the material consumption. Meanwhile, the thinner design is beneficial to faster heat exchange, reduces the dependence on cooling liquid and the complexity of a circulating system, and further reduces the cost.

4. The thin module provides greater flexibility in structural design, can be more easily adapted to different mounting positions and cooling fluid flowing modes, and is beneficial to improving the optimization degree of the overall design.

According to the embodiment, the heights (thicknesses) of other heating modules below the power circuit board are compressed, so that the other heating modules and the heating power modules below the power board can be immersed together to achieve a better heat dissipation effect. Wherein, other heating modules include inductance.

In some embodiments, the power circuit board includes a temperature control assembly for adjusting a temperature of the cooling fluid and a rotational speed of the cooling fan.

In some embodiments, the power circuit board includes a first temperature detection module and a second temperature detection module, the first temperature detection module is installed inside the heating power module, the first temperature detection module is used for detecting the temperature of the heating power module, the second temperature detection module is located in the liquid cooling tank and immersed in the cooling liquid, and the second temperature detection module is used for detecting the temperature of the cooling liquid.

The first temperature detection module of this embodiment is built-in each power module that generates heat, can each power module's that generates heat temperature in real time, and the second temperature detection module submerges in the liquid cooling liquid near the power module that generates heat, detects the liquid cooling liquid temperature near the power module that generates heat in real time, and wherein, the liquid cooling liquid temperature that the second temperature detection module gathered can be connected to power circuit board through the sampling line. And determining a temperature control strategy in real time according to the acquired temperature of the heating power module and the temperature of the cooling liquid so as to adjust the rotating speed of the cooling fan, the circulating speed of the cooling liquid and the power of the compressor, so that the heating power module works in a normal temperature range.

In addition, as shown in fig. 1 and 9, the energy storage converter has a case 60, the heat radiation fan 50 is mounted on a side wall of the case 60, and each element of the upper surface of the power circuit board 10 is enclosed in the case 60.

According to the embodiment, all key components are packaged in the shell, so that the integrated design of the energy storage converter is realized, and the protection level of the system is improved. In principle, the housing not only provides physical protection, but also isolates the external environment from the effects of internal components, such as dust, humidity, etc. The technology in the embodiment improves the environmental adaptability and safety of the energy storage converter and prolongs the service life of equipment. In other embodiments, the protection performance of the shell can be further improved by optimizing the material and the structure of the shell, such as adopting a material with higher waterproof and dustproof grade, or adding a radiating hole and an air duct so as to adapt to a worse working environment.

The embodiment of the application also provides an energy storage system which comprises any one of the energy storage converters.

According to the embodiment, by integrating any improved energy storage converter, an efficient and reliable energy storage system is constructed, and the overall performance of the system is improved. The energy storage converter is used as a core component of the energy storage system, and the heat dissipation performance of the energy storage converter directly influences the stability and efficiency of the system. The heat dissipation scheme of liquid cooling and air cooling is adopted to dissipate heat of the energy storage converter, so that the energy conversion efficiency and the heat management capability of the energy storage system are remarkably improved, the service life of the system is prolonged, and the operation cost is reduced.

In some embodiments, the energy storage system further comprises a compressor, the compressor is located outside the energy storage converter, the compressor includes a liquid inlet and a liquid outlet, the liquid inlet of the compressor is communicated with the cooling liquid outlet of the liquid cooling tank, and the liquid outlet of the compressor is communicated with the cooling liquid inlet of the liquid cooling tank.

By introducing the compressor, the forced circulation of the cooling liquid is realized, and the heat dissipation effect is enhanced, especially the heat dissipation capability under the high-power density and high-temperature environment. In principle, the compressor compresses the cooling liquid to raise the pressure and temperature, and then releases heat to cool the cooling liquid, and the cooling liquid is recycled back to the liquid cooling tank, so that a closed-loop liquid cooling circulation system is formed. In effect, the technology in this embodiment improves the heat dissipation efficiency and stability of the energy storage system, and reduces the failure rate caused by overheating.

In some embodiments, the energy storage system further comprises a liquid cooling pump and a heat exchanger, wherein the liquid cooling pump pumps the cooling liquid into the heat exchanger to cool the cooling liquid absorbing heat.

According to the embodiment, the liquid cooling pump and the heat exchanger are matched, so that the active circulation and temperature adjustment of the cooling liquid are realized, and the flexibility and the efficiency of the heat dissipation system are improved. The liquid cooling pump drives the cooling liquid to flow, and the heat exchanger releases heat of the cooling liquid through heat exchange with an external cooling medium, so that the temperature of the cooling liquid is reduced. The technology in the embodiment improves the heat radiation capability and the heat stability of the energy storage system, prolongs the service life of equipment and reduces the maintenance cost. In addition, the heat dissipation effect can be further improved by optimizing the designs of the liquid cooling pump and the heat exchanger, such as improving the flow rate of the pump or increasing the heat exchange area of the heat exchanger, so as to meet the heat dissipation requirement of higher power density.

The embodiment of the application also provides a temperature control method of the energy storage converter applying any one of the above, comprising the following steps:

acquiring the temperature of the cooling liquid and the temperature of the heating power module;

And adjusting the rotation speed of the cooling fan and the power of the compressor according to the temperature of the cooling liquid and the temperature of the heating power module, wherein the compressor is positioned outside the energy storage converter and comprises a liquid inlet and a liquid outlet, the liquid inlet of the compressor is communicated with the cooling liquid outlet of the liquid cooling tank, and the liquid outlet of the compressor is communicated with the cooling liquid inlet of the liquid cooling tank.

The power circuit board is also integrated with a temperature control component, the temperature control component comprises a temperature detection module and a temperature control strategy, the temperature of the cooling liquid and the temperature of the heating power module can be monitored in real time, and the circulation rate, the working frequency and the rotating speed of the cooling fan of the compressor can be automatically adjusted so as to cope with different load conditions. The first temperature detection module is arranged inside the heating power module and used for detecting the temperature of the heating power module, the second temperature detection module is distributed at the bottom of the power circuit board and used for detecting the temperature of cooling liquid in the liquid cooling tank, and the temperature control component dynamically adjusts the working power of the compressor, the flow rate of the cooling liquid or the liquid level height of the cooling liquid based on a temperature control strategy and real-time temperature data (cooling liquid temperature and heating power module temperature) to realize the fine control of the temperature of the power element. In addition, the temperature control strategy in the temperature control component can also adopt an intelligent algorithm, the intelligent algorithm can predict the future temperature change trend according to historical data and the current environment temperature by utilizing a model trained by machine learning, and measures are taken in advance to avoid the occurrence of overheat condition.

The temperature control assembly of the embodiment enables the thermal management of the energy storage converter to be more accurate, can dynamically adjust the cooling efficiency according to actual demands, avoids resource waste caused by excessive cooling, and simultaneously prevents equipment faults caused by overheating. The self-adaptive control mode improves the energy efficiency ratio of the system, and has direct influence on reducing the energy consumption and the operation cost of the whole energy storage system. And the intelligent level of the system is enhanced, the operation interface is simplified, and a user can check the temperature state of the power element in real time through the remote monitoring system, so that the operation and maintenance efficiency and the safety are improved.

Specifically, according to the temperature of the cooling liquid and the temperature of the heating power module, the rotation speed of the cooling fan and the power of the compressor are adjusted, and the cooling power module comprises at least one of the following components:

Under the condition that the temperature of the cooling liquid is larger than a cooling liquid temperature threshold value and the temperature of the heating power module is larger than a module temperature threshold value, increasing the rotating speed of the cooling fan to a first preset rotating speed, and increasing the power of the compressor to a first preset power;

When the temperature of the cooling liquid is larger than the temperature threshold of the cooling liquid and the temperature of the heating power module is smaller than or equal to the temperature threshold of the module, the rotating speed of the cooling fan is reduced to a second preset rotating speed, and the power of the compressor is increased to the first preset power, wherein the second preset rotating speed is smaller than the first preset rotating speed;

When the temperature of the cooling liquid is less than or equal to the temperature threshold of the cooling liquid and the temperature of the heating power module is greater than the temperature threshold of the module, the rotating speed of the cooling fan is increased to the first preset rotating speed, and the power of the compressor is increased to the first preset power;

controlling the rotation speed of the cooling fan to be unchanged and controlling the power of the compressor to be unchanged under the condition that the temperature of the cooling liquid is smaller than or equal to the temperature threshold value of the cooling liquid and the temperature of the heating power module is smaller than or equal to the temperature threshold value of the module;

And under the condition that the temperature of the heating power module is larger than a module temperature threshold value and the difference value between the temperature of the heating power module and the temperature of the cooling liquid is smaller than a set difference value, increasing the rotating speed of the cooling fan to the first preset rotating speed, and increasing the power of the compressor to the first preset power.

Specifically, a system architecture for implementing a temperature control method includes:

a temperature control unit (ICU) integrates a microprocessor of an AI algorithm, and the rotation speed of the cooling fan and the power of the compressor are dynamically adjusted based on temperature data.

And the cooling fan is an efficient fan supporting stepless speed regulation, and the rotating speed can be regulated according to the instruction of the ICU.

And the compressor adjusts the refrigeration power and the operation mode according to the signal sent by the ICU so as to control the temperature of the cooling liquid.

The implementation steps and logic for adjusting the rotation speed of the cooling fan and the power of the compressor according to the temperature of the cooling liquid and the temperature of the heating power module comprise:

1. initializing and setting:

the ICU is set to an ideal power module operating temperature range (e.g., 25-40C) and a coolant target temperature range (e.g., 15-25C).

At start-up, the fan and compressor are set to initial parameters such as 50% maximum speed and 50% maximum power.

2. Real-time temperature monitoring and feedback:

The temperature sensor continuously reads the temperature of the power module and the temperature of the cooling liquid, and the data are updated every second and sent to the ICU.

The ICU analyzes the gap between the current temperature state and the set range, and calculates the required heat dissipation and refrigeration intensity.

3. Dynamically adjusting the rotation speed of the cooling fan:

When the power module temperature exceeds the desired upper limit, the ICU immediately increases the fan speed, e.g., by 10% every 1 ℃ increase.

As the temperature decreases, the ICU gradually decreases the fan speed, avoiding excessive power consumption.

If the temperature of the power module is close to the protection shutdown temperature, the fan runs urgently at the maximum rotation speed until the temperature is reduced to be within a safe range.

4. Intelligent adjustment of compressor power:

When the coolant temperature is above the target upper temperature limit, the ICU increases the compressor power, e.g., 20% per 1 ℃ increase.

When the coolant temperature is below the target temperature lower limit, the compressor power is gradually reduced, even paused, to avoid excessive cooling.

The power adjustment of the compressor also considers the real-time heat load of the power module and combines with the temperature of the cooling liquid to achieve the best heat dissipation efficiency.

5. Comprehensive coordination control:

the ICU evaluates the comprehensive effect of heat dissipation and refrigeration in real time, and ensures the stability of the temperature of the power module and the cooling liquid.

Under the changing load condition, the ICU can predict the temperature change trend of the power module, and the working states of the fan and the compressor are adjusted in advance, so that the impact caused by the rapid change of the temperature is avoided.

6. Learning and optimizing:

The ICU learns the temperature change rule of the power module under different loads and the influence of the temperature of the cooling liquid on the heat dissipation effect through continuous data analysis.

Over time, the ICU can continuously optimize the control strategy and increase the response speed and the energy efficiency ratio of the heat dissipation system.

According to the embodiment, through setting different temperature thresholds and preset rotating speeds and powers, intelligent control of the cooling fan and the compressor is realized, and the flexibility and the efficiency of heat management are improved. In principle, according to the temperature of the cooling liquid and the temperature of the heating power module, the rotating speed of the cooling fan and the power of the compressor are automatically adjusted, so that the optimal cooling state under various working conditions is ensured. The embodiment realizes the improvement of the heat management effect of the energy storage converter, reduces the equipment failure rate caused by overheating, and optimizes the energy consumption and the operation cost of the equipment.

Further, according to the temperature of the cooling liquid and the temperature of the heating power module, the speed of the cooling fan and the power of the compressor are regulated, and the method comprises the steps of constructing a temperature regulation mapping table, wherein the temperature regulation mapping table is a mapping relation table of the temperature of the cooling liquid, the temperature of the heating power module, the speed of the cooling fan and the frequency of the compressor; and adjusting the rotating speed of the cooling fan and the power of the compressor according to the temperature adjustment mapping table, the cooling liquid temperature and the heating power module temperature.

According to the embodiment, the temperature regulation mapping table is constructed, so that the accurate control of the rotating speed of the cooling fan and the power of the compressor is realized, and the accuracy and the reliability of thermal management are improved. In principle, the temperature regulation mapping table is obtained based on a large amount of experimental data and working condition analysis, provides corresponding cooling fan rotating speed and compressor frequency for different cooling liquid temperatures and heating power module temperatures, and automatically adjusts the cooling strategy in a table look-up mode. The embodiment realizes the improvement of the heat management efficiency of the energy storage converter, reduces the equipment failure rate caused by overheat, and optimizes the energy consumption and the operation cost of the equipment. In addition, the embodiment further comprises a self-learning mechanism for continuously updating and optimizing the temperature regulation mapping table, so that the technical problem that the heat dissipation effect is reduced after the equipment runs for a long time is solved.

The embodiment of the application also provides electric equipment, and any one of the energy storage converters is adopted to supply power to the electric equipment.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the application and that various changes in form and details may be made therein without departing from the spirit and scope of the application. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the application, and the scope of the application should be assessed accordingly to that of the appended claims.

Claims (16)

1. An energy storage converter, comprising:

a power circuit board;

the heating power module is arranged at the bottom of the power circuit board and comprises a power semiconductor device;

the liquid cooling tank is used for accommodating cooling liquid, and the heating power module is immersed in the cooling liquid;

The other functional modules are arranged above the power circuit board and comprise an inverter, a rectifier, a transformer and a capacitor;

And the cooling fan is arranged above the power circuit board and is used for blowing hot air formed above the power circuit board.

2. The energy storage converter of claim 1, wherein the number of the liquid cooling tanks is equal to the number of the heating power modules, the liquid cooling tanks are in one-to-one correspondence with the heating power modules, and the plurality of the heating power modules are respectively immersed in the cooling liquid of the corresponding liquid cooling tanks.

3. The energy storage converter of claim 1, wherein the number of liquid cooling tanks is less than the number of heat generating power modules, and a plurality of heat generating power modules are immersed in at least one liquid cooling tank.

4. The energy storage converter of claim 1, wherein the height of the liquid cooling tank is greater than the thickness of the heating power module, and a difference between the height of the liquid cooling tank and the thickness of the heating power module is less than a preset value.

5. The energy storage converter of claim 1, wherein the liquid cooling tank further comprises a cooling liquid inlet and a cooling liquid outlet, the cooling liquid inlet and the cooling liquid outlet are embedded on the tank wall of the liquid cooling tank, and the height of the cooling liquid inlet is higher than the height of the cooling liquid outlet.

6. The energy storage converter of claim 1, wherein the bottom of the power circuit board is further provided with other heat generating modules, and the other heat generating modules are immersed in the cooling liquid.

7. The energy storage converter of claim 6, wherein the thickness of the other heating modules is less than the thickness of the reference heating module, and the electrical parameter values of the other heating modules are equal to the electrical parameter values of the reference heating module.

8. The energy storage converter of claim 1, wherein the power circuit board includes a temperature control assembly for regulating the temperature of the coolant and the rotational speed of the cooling fan.

9. The energy storage converter of claim 1, wherein the power circuit board comprises a first temperature detection module and a second temperature detection module, the first temperature detection module is mounted inside the heating power module, the first temperature detection module is used for detecting the temperature of the heating power module, the second temperature detection module is located in the liquid cooling tank and immersed in the cooling liquid, and the second temperature detection module is used for detecting the temperature of the cooling liquid.

10. An energy storage system, characterized in that the energy storage system comprises an energy storage converter according to any one of claims 1 to 9.

11. The energy storage system of claim 10, further comprising a compressor, the compressor being located external to the energy storage converter, the compressor comprising a liquid inlet and a liquid outlet, the liquid inlet of the compressor being in communication with the liquid cooling tank cooling liquid outlet, the liquid outlet of the compressor being in communication with the liquid cooling tank cooling liquid inlet.

12. The energy storage system of claim 10, further comprising a liquid cooled pump and a heat exchanger, the liquid cooled pump pumping the cooling liquid into the heat exchanger to cool the cooling liquid absorbing heat.

13. A temperature control method using the energy storage converter of any one of claims 1 to 9, comprising:

acquiring the temperature of the cooling liquid and the temperature of the heating power module;

According to the temperature of the cooling liquid and the temperature of the heating power module, the rotating speed of the cooling fan and the power of the compressor are adjusted, wherein the compressor is positioned outside the energy storage converter and comprises a liquid inlet and a liquid outlet, the liquid inlet of the compressor is communicated with the cooling liquid outlet of the liquid cooling tank, and the liquid outlet of the compressor is communicated with the cooling liquid inlet of the liquid cooling tank.

14. The method of claim 13, wherein adjusting the rotational speed of the cooling fan and the power of the compressor according to the coolant temperature and the heat generating power module temperature comprises at least one of:

Under the condition that the temperature of the cooling liquid is larger than a cooling liquid temperature threshold value and the temperature of the heating power module is larger than a module temperature threshold value, increasing the rotating speed of the cooling fan to a first preset rotating speed, and increasing the power of the compressor to a first preset power;

When the temperature of the cooling liquid is larger than the temperature threshold of the cooling liquid and the temperature of the heating power module is smaller than or equal to the temperature threshold of the module, the rotating speed of the cooling fan is reduced to a second preset rotating speed, and the power of the compressor is increased to the first preset power, wherein the second preset rotating speed is smaller than the first preset rotating speed;

When the temperature of the cooling liquid is smaller than or equal to the temperature threshold of the cooling liquid and the temperature of the heating power module is larger than the temperature threshold of the module, the rotating speed of the cooling fan is increased to the first preset rotating speed, and the power of the compressor is increased to the first preset power;

when the temperature of the cooling liquid is smaller than or equal to the temperature threshold of the cooling liquid and the temperature of the heating power module is smaller than or equal to the temperature threshold of the module, controlling the rotating speed of the cooling fan to be unchanged, and controlling the power of the compressor to be unchanged;

And under the condition that the temperature of the heating power module is larger than a module temperature threshold value and the difference value between the temperature of the heating power module and the temperature of the cooling liquid is smaller than a set difference value, increasing the rotating speed of the cooling fan to the first preset rotating speed, and increasing the power of the compressor to the first preset power.

15. The method of claim 13, wherein adjusting the rotational speed of the cooling fan and the power of the compressor according to the coolant temperature and the heat generating power module temperature comprises:

Constructing a temperature regulation mapping table, wherein the temperature regulation mapping table is a mapping relation table of the temperature of the cooling liquid and the temperature of the heating power module, the rotating speed of the cooling fan and the frequency of the compressor;

and adjusting the rotating speed of the cooling fan and the power of the compressor according to the temperature adjustment mapping table, the temperature of the cooling liquid and the temperature of the heating power module.

16. A powered device, characterized in that the powered device is powered by an energy storage converter according to any of claims 1 to 9.